/* ============================================
   CSS VARIABLES (Custom Properties)
   ============================================
   Centralized design tokens for easy theming.
   Change these values to update the entire site's look.
   ============================================ */
:root {
  /* ---- Primary Colors ---- */
  --color-primary: #6366f1; /* Main brand color (Indigo) */
  --color-primary-dark: #4f46e5; /* Darker shade for hover states */
  --color-primary-light: #818cf8; /* Lighter shade for accents */

  /* ---- Secondary Colors ---- */
  --color-secondary: #10b981; /* Accent color (Emerald) */
  --color-secondary-dark: #059669;

  /* ---- Neutral Colors ---- */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #f9fafb; /* Lightest gray - backgrounds */
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280; /* Mid gray - secondary text */
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937; /* Dark gray - primary text */
  --color-gray-900: #111827; /* Darkest - headings */

  /* ---- Semantic Colors ---- */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* ---- Typography ---- */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: "Poppins", -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes - Using clamp() for fluid typography */
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem; /* 36px */
  --font-size-5xl: 3rem; /* 48px */
  --font-size-6xl: 3.75rem; /* 60px */

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* ---- Spacing Scale ---- */
  --spacing-1: 0.25rem; /* 4px */
  --spacing-2: 0.5rem; /* 8px */
  --spacing-3: 0.75rem; /* 12px */
  --spacing-4: 1rem; /* 16px */
  --spacing-5: 1.25rem; /* 20px */
  --spacing-6: 1.5rem; /* 24px */
  --spacing-8: 2rem; /* 32px */
  --spacing-10: 2.5rem; /* 40px */
  --spacing-12: 3rem; /* 48px */
  --spacing-16: 4rem; /* 64px */
  --spacing-20: 5rem; /* 80px */
  --spacing-24: 6rem; /* 96px */

  /* ---- Layout ---- */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-6);
  --section-padding: var(--spacing-20);
  --header-height: 80px;

  /* ---- Borders & Radius ---- */
  --border-radius-sm: 0.25rem; /* 4px */
  --border-radius-md: 0.5rem; /* 8px */
  --border-radius-lg: 1rem; /* 16px */
  --border-radius-xl: 1.5rem; /* 24px */
  --border-radius-full: 9999px; /* Fully rounded */

  /* ---- Shadows ---- */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* ---- Transitions ---- */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* ---- Z-Index Scale ---- */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
  --z-loader: 9999;
}

/* ============================================
   DARK MODE VARIABLES (Phase 9)
   ============================================
   Colors that change in dark mode
   ============================================ */
[data-theme="dark"] {
  --color-white: #0f172a;
  --color-black: #f8fafc;
  --color-gray-50: #1e293b;
  --color-gray-100: #1e293b;
  --color-gray-200: #334155;
  --color-gray-300: #475569;
  --color-gray-400: #64748b;
  --color-gray-500: #94a3b8;
  --color-gray-600: #cbd5e1;
  --color-gray-700: #e2e8f0;
  --color-gray-800: #f1f5f9;
  --color-gray-900: #f8fafc;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3),
    0 4px 6px -4px rgb(0 0 0 / 0.3);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3),
    0 8px 10px -6px rgb(0 0 0 / 0.3);
}

/* Dark mode specific overrides */
[data-theme="dark"] #header {
  background-color: rgba(15, 23, 42, 0.95);
  border-bottom-color: var(--color-gray-200);
}

[data-theme="dark"] .hero-section {
  background: linear-gradient(
    135deg,
    var(--color-gray-50) 0%,
    var(--color-gray-100) 100%
  );
}

[data-theme="dark"] .about-image-placeholder {
  background: linear-gradient(
    135deg,
    var(--color-gray-200),
    var(--color-gray-300)
  );
}

[data-theme="dark"] .skill-bar {
  background-color: var(--color-gray-200);
}

[data-theme="dark"] .portfolio-item {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .project-overlay {
  background: linear-gradient(
    to top,
    rgba(15, 23, 42, 0.95),
    rgba(15, 23, 42, 0.7),
    transparent
  );
}

[data-theme="dark"] .timeline-content {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .timeline::before {
  background-color: var(--color-gray-200);
}

[data-theme="dark"] .testimonial-card {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .contact-form-wrapper {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-200);
  color: var(--color-gray-800);
}

[data-theme="dark"] .form-group input::placeholder,
[data-theme="dark"] .form-group textarea::placeholder {
  color: var(--color-gray-400);
}

[data-theme="dark"] .filter-btn {
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
}

[data-theme="dark"] .tech-icon {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .service-card {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .social-link {
  background-color: var(--color-gray-100);
}

[data-theme="dark"] .page-loader {
  background: var(--color-gray-50);
}

/* ============================================
   CSS RESET & BASE STYLES
   ============================================
   Modern CSS reset for consistent cross-browser rendering.
   Removes default margins, padding, and sets box-sizing.
   ============================================ */

/* ============================================
   PAGE LOADER (Phase 9)
   ============================================ */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loader);
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-4);
}

.spinner-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 3px solid transparent;
}

.spinner-ring:nth-child(1) {
  border-top-color: var(--color-primary);
  animation: spin 1.2s linear infinite;
}

.spinner-ring:nth-child(2) {
  border-right-color: var(--color-secondary);
  animation: spin 1.2s linear infinite 0.15s;
}

.spinner-ring:nth-child(3) {
  border-bottom-color: var(--color-primary-light);
  animation: spin 1.2s linear infinite 0.3s;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loader-text {
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ============================================
   SKIP LINK (Accessibility)
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-semibold);
  z-index: 10000;
  transition: top var(--transition-fast);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--spacing-4);
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

/* ============================================
   THEME TOGGLE (Phase 9)
   ============================================ */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-gray-100);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  margin-right: var(--spacing-4);
  overflow: hidden;
}

.theme-toggle:hover {
  background: var(--color-gray-200);
  transform: scale(1.05);
}

.theme-toggle i {
  position: absolute;
  font-size: var(--font-size-lg);
  transition: all var(--transition-normal);
}

.theme-toggle .fa-moon {
  color: var(--color-gray-700);
  opacity: 1;
  transform: rotate(0deg);
}

.theme-toggle .fa-sun {
  color: var(--color-warning);
  opacity: 0;
  transform: rotate(-180deg);
}

[data-theme="dark"] .theme-toggle {
  background: var(--color-gray-100);
}

[data-theme="dark"] .theme-toggle .fa-moon {
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle .fa-sun {
  opacity: 1;
  transform: rotate(0deg);
}

/* ============================================
   SCROLL REVEAL ANIMATIONS (Phase 9)
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Staggered reveal for children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-stagger.revealed > *:nth-child(1) {
  transition-delay: 0.1s;
}
.reveal-stagger.revealed > *:nth-child(2) {
  transition-delay: 0.2s;
}
.reveal-stagger.revealed > *:nth-child(3) {
  transition-delay: 0.3s;
}
.reveal-stagger.revealed > *:nth-child(4) {
  transition-delay: 0.4s;
}
.reveal-stagger.revealed > *:nth-child(5) {
  transition-delay: 0.5s;
}
.reveal-stagger.revealed > *:nth-child(6) {
  transition-delay: 0.6s;
}

.reveal-stagger.revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* Box sizing rules */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Remove default margin and set core body defaults */
html {
  scroll-behavior: smooth; /* Smooth scrolling for anchor links */
  scroll-padding-top: var(--header-height); /* Offset for fixed header */
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-700);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
}

h1 {
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
}
h2 {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
}
h3 {
  font-size: clamp(var(--font-size-2xl), 3vw, var(--font-size-4xl));
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-base);
}

/* Paragraphs */
p {
  margin-bottom: var(--spacing-4);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Lists */
ul,
ol {
  list-style: none;
}

/* Buttons */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Form elements */
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================
   UTILITY CLASSES
   ============================================
   Reusable utility classes for common patterns.
   ============================================ */

/* Container - Centers content with max-width */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Section - Standard section padding */
.section {
  padding: var(--section-padding) 0;
}

/* Screen reader only - Visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Text alignment */
.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}
.text-right {
  text-align: right;
}

/* ============================================
   HEADER & NAVIGATION STYLES
   ============================================
   Fixed header with navigation links.
   Phase 2: Complete navigation with mobile menu
   ============================================ */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: none;
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
}

/* Header scrolled state - adds shadow */
#header.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Logo Styling */
.logo a {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  position: relative;
  transition: color var(--transition-fast);
}

.logo a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: var(--border-radius-full);
  transition: width var(--transition-normal);
}

.logo a:hover {
  color: var(--color-primary);
}

.logo a:hover::after {
  width: 100%;
}

/* Navigation Links */
.nav-links {
  display: flex;
  gap: var(--spacing-8);
}

.nav-links li {
  position: relative;
}

.nav-links a {
  color: var(--color-gray-600);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
  transition: width var(--transition-normal);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Active link state */
.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a.active::after {
  width: 100%;
}

/* Mobile menu toggle - Hidden on desktop */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: var(--spacing-2);
  z-index: var(--z-fixed);
}

.hamburger .bar {
  width: 28px;
  height: 3px;
  background-color: var(--color-gray-700);
  border-radius: var(--border-radius-full);
  transition: all var(--transition-normal);
  transform-origin: center;
}

/* Hamburger animation when active */
.hamburger.active .bar:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active .bar:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   SECTION PLACEHOLDER STYLES
   ============================================
   Temporary styles for section placeholders.
   These will be replaced in subsequent phases.
   ============================================ */

/* ============================================
   HERO SECTION STYLES (Phase 3)
   ============================================
   Full-screen landing section with animations
   ============================================ */

/* Hero Section Layout */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    135deg,
    var(--color-gray-50) 0%,
    var(--color-white) 50%,
    var(--color-gray-100) 100%
  );
  padding-top: var(--header-height);
}

/* Animated Background Shapes */
.hero-bg-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
  filter: blur(60px);
  animation: float 20s ease-in-out infinite;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: linear-gradient(
    135deg,
    var(--color-primary-light),
    var(--color-primary)
  );
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(
    135deg,
    var(--color-secondary),
    var(--color-secondary-dark)
  );
  bottom: -10%;
  left: -5%;
  animation-delay: -5s;
}

.shape-3 {
  width: 300px;
  height: 300px;
  background: linear-gradient(
    135deg,
    var(--color-info),
    var(--color-primary-light)
  );
  top: 50%;
  left: 30%;
  animation-delay: -10s;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(20px, -30px) rotate(5deg);
  }
  50% {
    transform: translate(-20px, 20px) rotate(-5deg);
  }
  75% {
    transform: translate(30px, 10px) rotate(3deg);
  }
}

/* Hero Container */
.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

/* Hero Content */
.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-greeting {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
  animation: fadeInUp 0.8s ease-out 0.1s backwards;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
  line-height: 1.1;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-name span {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Typing Animation */
.hero-title-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-6);
  animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.hero-title-static {
  color: var(--color-gray-700);
}

.hero-title-dynamic {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.typing-cursor {
  color: var(--color-primary);
  font-weight: var(--font-weight-light);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  max-width: 500px;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-8);
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

/* CTA Buttons */
.hero-cta {
  display: flex;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
  animation: fadeInUp 0.8s ease-out 0.5s backwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-gray-700);
  border: 2px solid var(--color-gray-300);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-3px);
}

/* Social Links */
.hero-social {
  display: flex;
  gap: var(--spacing-4);
  animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  border-radius: var(--border-radius-full);
  background-color: var(--color-white);
  color: var(--color-gray-600);
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Hero Image */
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.hero-image-wrapper {
  position: relative;
  width: 400px;
  height: 400px;
}

.hero-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: morphShape 8s ease-in-out infinite;
  box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
}

.hero-image-placeholder i {
  font-size: 8rem;
  color: var(--color-white);
  opacity: 0.9;
}

@keyframes morphShape {
  0%,
  100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
  25% {
    border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%;
  }
  50% {
    border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%;
  }
  75% {
    border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%;
  }
}

/* Decorative Elements */
.hero-decoration {
  position: absolute;
  border-radius: var(--border-radius-full);
  animation: pulse 3s ease-in-out infinite;
}

.dec-1 {
  width: 20px;
  height: 20px;
  background-color: var(--color-secondary);
  top: 10%;
  right: 10%;
  animation-delay: 0s;
}

.dec-2 {
  width: 15px;
  height: 15px;
  background-color: var(--color-primary-light);
  bottom: 20%;
  left: 5%;
  animation-delay: 1s;
}

.dec-3 {
  width: 25px;
  height: 25px;
  background-color: var(--color-warning);
  top: 60%;
  right: 0;
  animation-delay: 2s;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.3);
    opacity: 0.7;
  }
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  animation: fadeInUp 0.8s ease-out 0.8s backwards;
  transition: color var(--transition-fast);
}

.scroll-indicator:hover {
  color: var(--color-primary);
}

.mouse {
  width: 26px;
  height: 40px;
  border: 2px solid currentColor;
  border-radius: 20px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 8px;
  background-color: currentColor;
  border-radius: var(--border-radius-full);
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
  50% {
    transform: translateX(-50%) translateY(10px);
    opacity: 0.5;
  }
}

/* ============================================
   ABOUT SECTION STYLES (Phase 4)
   ============================================
   Professional bio with image and stats
   ============================================ */

/* Section Header - Reusable */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-16);
}

.section-subtitle {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-2);
}

.section-title {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  color: var(--color-gray-900);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: var(--border-radius-full);
}

/* About Section */
.about-section {
  background-color: var(--color-white);
  padding: var(--section-padding) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-16);
  align-items: center;
  margin-bottom: var(--spacing-16);
}

/* About Image */
.about-image {
  position: relative;
}

.about-image-wrapper {
  position: relative;
  max-width: 400px;
  margin: 0 auto;
}

/* Profile Image */
.about-img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 4/5;
  background: linear-gradient(
    135deg,
    var(--color-gray-100),
    var(--color-gray-200)
  );
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-image-placeholder::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-secondary) 100%
  );
  opacity: 0.1;
}

.about-image-placeholder i {
  font-size: 6rem;
  color: var(--color-gray-400);
  position: relative;
  z-index: 1;
}

/* Experience Badge */
.experience-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: var(--color-white);
  padding: var(--spacing-6);
  border-radius: var(--border-radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: float 3s ease-in-out infinite;
}

.badge-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.badge-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.9;
}

/* About Content */
.about-content {
  padding-left: var(--spacing-8);
}

.about-heading {
  font-size: var(--font-size-2xl);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-6);
  line-height: var(--line-height-tight);
}

.about-text {
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-4);
}

/* About Info Grid */
.about-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-4);
  margin: var(--spacing-8) 0;
  padding: var(--spacing-6);
  background-color: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.info-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  font-weight: var(--font-weight-medium);
}

.info-value {
  font-size: var(--font-size-base);
  color: var(--color-gray-800);
  font-weight: var(--font-weight-semibold);
}

.status-available {
  color: var(--color-success);
}

.status-available::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: 50%;
  margin-right: var(--spacing-2);
  animation: pulse 2s infinite;
}

/* About CTA */
.about-cta {
  display: flex;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* About Stats */
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-6);
  padding: var(--spacing-10);
  background: linear-gradient(
    135deg,
    var(--color-gray-900),
    var(--color-gray-800)
  );
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-4);
}

.stat-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: var(--border-radius-lg);
  flex-shrink: 0;
}

.stat-icon i {
  font-size: var(--font-size-xl);
  color: var(--color-white);
}

.stat-content {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-top: var(--spacing-1);
}

/* ============================================
   SKILLS SECTION STYLES (Phase 5)
   ============================================
   Skills with progress bars, circles, and services
   ============================================ */

/* Skills Section */
.skills-section {
  background-color: var(--color-gray-50);
  padding: var(--section-padding) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-16);
}

/* Skills Category */
.skills-category {
  background-color: var(--color-white);
  padding: var(--spacing-8);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
}

.skills-category-title {
  font-size: var(--font-size-xl);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-6);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.skills-category-title i {
  color: var(--color-primary);
}

/* Skill Bars */
.skill-bars {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.skill-item {
  width: 100%;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-2);
}

.skill-name {
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.skill-percent {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.skill-bar {
  height: 10px;
  background-color: var(--color-gray-200);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  width: var(--progress);
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: var(--border-radius-full);
  position: relative;
  animation: progressFill 1.5s ease-out;
}

@keyframes progressFill {
  from {
    width: 0;
  }
  to {
    width: var(--progress);
  }
}

/* Circle Skills */
.skill-circles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
}

.circle-skill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-3);
}

.circle-progress {
  position: relative;
  width: 100px;
  height: 100px;
}

.circle-progress svg {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.circle-bg {
  fill: none;
  stroke: var(--color-gray-200);
  stroke-width: 8;
}

.circle-fill {
  fill: none;
  stroke: url(#gradient);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: calc(283 - (283 * var(--progress)) / 100);
  transition: stroke-dashoffset 1.5s ease-out;
}

.circle-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-800);
}

.circle-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  text-align: center;
}

/* Tech Stack */
.tech-stack {
  margin-bottom: var(--spacing-16);
}

.tech-stack-title {
  font-size: var(--font-size-xl);
  color: var(--color-gray-900);
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.tech-icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-6);
}

.tech-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4);
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  min-width: 80px;
}

.tech-icon:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.tech-icon:hover i {
  color: var(--color-primary);
  transform: scale(1.1);
}

.tech-icon i {
  font-size: var(--font-size-3xl);
  color: var(--color-gray-600);
  transition: all var(--transition-normal);
}

.tech-icon span {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-6);
}

.service-card {
  background-color: var(--color-white);
  padding: var(--spacing-8);
  border-radius: var(--border-radius-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover .service-icon {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
}

.service-card:hover .service-icon i {
  color: var(--color-white);
}

.service-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--spacing-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-100);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
}

.service-icon i {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  transition: all var(--transition-normal);
}

.service-title {
  font-size: var(--font-size-lg);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-3);
}

.service-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* ============================================
   PORTFOLIO SECTION STYLES (Phase 6)
   ============================================
   Project showcase with filters and hover effects
   ============================================ */

/* Portfolio Section */
.portfolio-section {
  background-color: var(--color-white);
  padding: var(--section-padding) 0;
}

/* Filter Buttons */
.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-12);
}

.filter-btn {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  background-color: var(--color-gray-100);
  border-radius: var(--border-radius-full);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.filter-btn:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-200);
}

.filter-btn.active {
  color: var(--color-white);
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

/* Portfolio Item */
.portfolio-item {
  transition: all var(--transition-normal);
}

.portfolio-item.hidden {
  display: none;
}

/* Portfolio Card */
.portfolio-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

/* Portfolio Image */
.portfolio-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.portfolio-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-card:hover .portfolio-img {
  transform: scale(1.1);
}

.portfolio-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--color-gray-100),
    var(--color-gray-200)
  );
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-image-placeholder i {
  font-size: 3rem;
  color: var(--color-gray-400);
}

/* Portfolio Overlay */
.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.9),
    rgba(16, 185, 129, 0.9)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-normal);
}

.portfolio-card:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-links {
  display: flex;
  gap: var(--spacing-4);
}

.portfolio-link {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-white);
  border-radius: var(--border-radius-full);
  color: var(--color-gray-800);
  font-size: var(--font-size-lg);
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.portfolio-card:hover .portfolio-link {
  transform: translateY(0);
  opacity: 1;
}

.portfolio-card:hover .portfolio-link:nth-child(2) {
  transition-delay: 0.1s;
}

.portfolio-link:hover {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  transform: scale(1.1);
}

/* Portfolio Info */
.portfolio-info {
  padding: var(--spacing-6);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.portfolio-category {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-2);
}

.portfolio-title {
  font-size: var(--font-size-lg);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.portfolio-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
}

.portfolio-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.portfolio-tech span {
  font-size: var(--font-size-xs);
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
  border-radius: var(--border-radius-full);
}

/* Portfolio CTA */
.portfolio-cta {
  text-align: center;
}

/* ============================================
   EXPERIENCE SECTION STYLES (Phase 7)
   ============================================
   Timeline, education, and testimonials
   ============================================ */

/* Experience Section */
.experience-section {
  background-color: var(--color-gray-50);
  padding: var(--section-padding) 0;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-16);
}

/* Timeline Column */
.timeline-column {
  background-color: var(--color-white);
  padding: var(--spacing-8);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
}

.timeline-heading {
  font-size: var(--font-size-xl);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-8);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.timeline-heading i {
  color: var(--color-primary);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--spacing-8);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(
    180deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: var(--border-radius-full);
}

/* Timeline Item */
.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--spacing-8) - 6px);
  top: 0;
  width: 14px;
  height: 14px;
  background-color: var(--color-white);
  border: 3px solid var(--color-primary);
  border-radius: 50%;
  z-index: 1;
  transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-dot {
  background-color: var(--color-primary);
  transform: scale(1.3);
}

.timeline-content {
  background-color: var(--color-gray-50);
  padding: var(--spacing-5);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-content {
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  transform: translateX(5px);
}

.timeline-date {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  background-color: rgba(99, 102, 241, 0.1);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--border-radius-full);
  margin-bottom: var(--spacing-2);
}

.timeline-title {
  font-size: var(--font-size-lg);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-1);
}

.timeline-company {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-3);
}

.timeline-company i {
  font-size: var(--font-size-xs);
}

.timeline-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* Testimonials */
.testimonials {
  text-align: center;
}

.testimonials-heading {
  font-size: var(--font-size-2xl);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-10);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-8);
}

/* Testimonial Card */
.testimonial-card {
  background-color: var(--color-white);
  padding: var(--spacing-8);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  text-align: left;
  position: relative;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.testimonial-quote {
  position: absolute;
  top: var(--spacing-6);
  right: var(--spacing-6);
  font-size: var(--font-size-3xl);
  color: var(--color-gray-100);
}

.testimonial-text {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-6);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
}

.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-avatar i {
  color: var(--color-white);
  font-size: var(--font-size-lg);
}

.author-info {
  text-align: left;
}

.author-name {
  font-size: var(--font-size-base);
  color: var(--color-gray-900);
  margin-bottom: 0;
}

.author-title {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* ============================================
   CONTACT SECTION STYLES (Phase 8)
   ============================================
   Contact form and information
   ============================================ */

/* Contact Section */
.contact-section {
  background-color: var(--color-white);
  padding: var(--section-padding) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-12);
  align-items: start;
}

/* Contact Info */
.contact-info {
  background: linear-gradient(
    135deg,
    var(--color-gray-900),
    var(--color-gray-800)
  );
  padding: var(--spacing-10);
  border-radius: var(--border-radius-xl);
  color: var(--color-white);
}

.contact-info-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-4);
}

.contact-info-desc {
  color: var(--color-gray-400);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-8);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
  margin-bottom: var(--spacing-8);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: var(--font-size-lg);
  color: var(--color-white);
}

.contact-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.contact-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.contact-text a,
.contact-text span {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.contact-text a:hover {
  color: var(--color-primary-light);
}

/* Contact Social */
.contact-social {
  border-top: 1px solid var(--color-gray-700);
  padding-top: var(--spacing-6);
}

.social-title {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-4);
}

.social-links {
  display: flex;
  gap: var(--spacing-3);
}

.contact-social .social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-700);
  border-radius: var(--border-radius-full);
  color: var(--color-white);
  transition: all var(--transition-normal);
}

.contact-social .social-link:hover {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  transform: translateY(-3px);
}

/* Contact Form */
.contact-form-wrapper {
  background-color: var(--color-gray-50);
  padding: var(--spacing-10);
  border-radius: var(--border-radius-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.form-input {
  padding: var(--spacing-4);
  font-size: var(--font-size-base);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
  color: var(--color-gray-400);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  display: none;
}

.form-group.error .form-input {
  border-color: var(--color-error);
}

.form-group.error .form-error {
  display: block;
}

.form-submit {
  align-self: flex-start;
  padding: var(--spacing-4) var(--spacing-8);
}

.form-status {
  padding: var(--spacing-4);
  border-radius: var(--border-radius-lg);
  display: none;
  text-align: center;
}

.form-status.success {
  display: block;
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
}

.form-status.error {
  display: block;
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

/* ============================================
   FOOTER STYLES (Phase 8)
   ============================================
   Complete footer with links and social
   ============================================ */
#footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--spacing-16) 0 var(--spacing-6);
  position: relative;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-8);
  padding-bottom: var(--spacing-10);
  border-bottom: 1px solid var(--color-gray-700);
  margin-bottom: var(--spacing-6);
}

/* Footer Brand */
.footer-logo {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  display: inline-block;
  margin-bottom: var(--spacing-4);
}

.footer-logo:hover {
  color: var(--color-primary-light);
}

.footer-desc {
  color: var(--color-gray-400);
  line-height: var(--line-height-relaxed);
  max-width: 300px;
}

/* Footer Titles */
.footer-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-5);
}

/* Footer Navigation */
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer-nav li {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.footer-nav a {
  color: var(--color-gray-400);
  transition: all var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-primary-light);
  transform: translateX(5px);
}

.footer-nav i {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

/* Footer Bottom */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copyright {
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

.footer-social {
  display: flex;
  gap: var(--spacing-4);
}

.footer-social a {
  color: var(--color-gray-400);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  color: var(--color-primary-light);
  transform: translateY(-3px);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-8);
  right: var(--spacing-8);
  width: 50px;
  height: 50px;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: var(--color-white);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: var(--z-fixed);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  color: var(--color-white);
}

/* ============================================
   MICRO-INTERACTIONS (Phase 9)
   ============================================
   Enhanced hover and focus effects
   ============================================ */

/* Magnetic hover effect for buttons */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

/* Card hover lift effect */
.hover-lift {
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

/* Glow effect on focus for form inputs */
.form-group input:focus,
.form-group textarea:focus {
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

/* Icon bounce on hover */
.icon-bounce:hover i {
  animation: iconBounce 0.5s ease;
}

@keyframes iconBounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

/* Underline grow effect for links */
.link-underline {
  position: relative;
}

.link-underline::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}

.link-underline:hover::after {
  width: 100%;
}

/* Shimmer loading effect */
.shimmer {
  position: relative;
  overflow: hidden;
}

.shimmer::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  100% {
    left: 100%;
  }
}

/* Text gradient animation */
.text-gradient-animate {
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary),
    var(--color-primary)
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
  0% {
    background-position: 0% center;
  }
  50% {
    background-position: 100% center;
  }
  100% {
    background-position: 0% center;
  }
}

/* Parallax container */
.parallax-container {
  position: relative;
  overflow: hidden;
}

.parallax-bg {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 140%;
  background-size: cover;
  background-position: center;
  will-change: transform;
}

/* Tilt effect container */
.tilt-effect {
  transform-style: preserve-3d;
  perspective: 1000px;
}

/* Floating animation for decorative elements */
.float-element {
  animation: floatUpDown 4s ease-in-out infinite;
}

@keyframes floatUpDown {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

/* Rotate animation */
.rotate-slow {
  animation: rotateSlow 20s linear infinite;
}

@keyframes rotateSlow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Scale pulse effect */
.scale-pulse {
  animation: scalePulse 2s ease-in-out infinite;
}

@keyframes scalePulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Cursor trail (for decorative purposes) */
.cursor-glow {
  pointer-events: none;
  position: fixed;
  width: 20px;
  height: 20px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.5), transparent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 9998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* Focus visible for accessibility */
.btn:focus-visible,
.nav-links a:focus-visible,
.social-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
  }

  .page-loader {
    display: none;
  }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================
   Mobile-first responsive design.
   
   Breakpoints:
   - sm: 640px  (Small tablets)
   - md: 768px  (Tablets)
   - lg: 1024px (Small laptops)
   - xl: 1280px (Desktops)
   - 2xl: 1536px (Large desktops)
   ============================================ */

/* Small devices (landscape phones, 576px and up) */
@media (max-width: 768px) {
  :root {
    --container-padding: var(--spacing-4);
    --section-padding: var(--spacing-12);
    --header-height: 70px;
  }

  /* Mobile Navigation Menu */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: linear-gradient(
      135deg,
      var(--color-gray-900) 0%,
      var(--color-gray-800) 100%
    );
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-8);
    transition: right var(--transition-normal);
    z-index: var(--z-modal);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    color: var(--color-white);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-4) var(--spacing-8);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
  }

  .nav-links.active a {
    opacity: 1;
    transform: translateY(0);
  }

  /* Stagger animation for nav links */
  .nav-links.active li:nth-child(1) a {
    transition-delay: 0.1s;
  }
  .nav-links.active li:nth-child(2) a {
    transition-delay: 0.15s;
  }
  .nav-links.active li:nth-child(3) a {
    transition-delay: 0.2s;
  }
  .nav-links.active li:nth-child(4) a {
    transition-delay: 0.25s;
  }
  .nav-links.active li:nth-child(5) a {
    transition-delay: 0.3s;
  }
  .nav-links.active li:nth-child(6) a {
    transition-delay: 0.35s;
  }

  .nav-links a::after {
    bottom: 0;
    background-color: var(--color-primary-light);
  }

  .nav-links a:hover {
    color: var(--color-primary-light);
  }

  .nav-links a.active {
    color: var(--color-primary-light);
  }

  /* Theme toggle mobile */
  .theme-toggle {
    width: 38px;
    height: 38px;
    margin-right: var(--spacing-2);
  }

  /* Show hamburger on mobile */
  .hamburger {
    display: flex;
    z-index: calc(var(--z-modal) + 1);
  }

  .hamburger.active .bar {
    background-color: var(--color-white);
  }

  /* Prevent body scroll when menu is open */
  body.menu-open {
    overflow: hidden;
  }

  /* Hero Section Mobile Styles */
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-10);
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
  }

  .hero-image-wrapper {
    width: 280px;
    height: 280px;
  }

  .hero-image-placeholder i {
    font-size: 5rem;
  }

  .hero-title-wrapper {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
    flex-wrap: wrap;
  }

  .btn {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
  }

  .hero-social {
    justify-content: center;
  }

  .scroll-indicator {
    display: none;
  }

  /* Hide background shapes on mobile for performance */
  .shape {
    display: none;
  }

  /* About Section Mobile Styles */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-10);
    text-align: center;
  }

  .about-image-wrapper {
    max-width: 300px;
  }

  .experience-badge {
    right: 0;
    bottom: -15px;
    padding: var(--spacing-4);
  }

  .badge-number {
    font-size: var(--font-size-2xl);
  }

  .about-content {
    padding-left: 0;
  }

  .about-info {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .about-cta {
    justify-content: center;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: var(--spacing-6);
    gap: var(--spacing-4);
  }

  .stat-item {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-3);
  }

  .stat-icon {
    width: 50px;
    height: 50px;
  }

  .stat-number {
    font-size: var(--font-size-2xl);
  }

  /* Skills Section Mobile Styles */
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .skill-circles {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }

  .circle-progress {
    width: 80px;
    height: 80px;
  }

  .tech-icons {
    gap: var(--spacing-4);
  }

  .tech-icon {
    min-width: 70px;
    padding: var(--spacing-3);
  }

  .tech-icon i {
    font-size: var(--font-size-2xl);
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }

  .service-card {
    padding: var(--spacing-6);
  }

  /* Portfolio Section Mobile Styles */
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .portfolio-filters {
    gap: var(--spacing-2);
  }

  .filter-btn {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-xs);
  }

  /* Experience Section Mobile Styles */
  .experience-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .timeline-column {
    padding: var(--spacing-6);
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .testimonial-card {
    padding: var(--spacing-6);
  }

  /* Contact Section Mobile Styles */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .contact-info {
    padding: var(--spacing-6);
  }

  .contact-form-wrapper {
    padding: var(--spacing-6);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-submit {
    width: 100%;
  }

  /* Footer Mobile Styles */
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-8);
  }

  .footer-desc {
    max-width: 100%;
    margin: 0 auto;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-4);
  }

  .back-to-top {
    right: var(--spacing-4);
    bottom: var(--spacing-4);
    width: 45px;
    height: 45px;
  }
}

/* Tablet breakpoint for portfolio */
@media (min-width: 640px) and (max-width: 1023px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  :root {
    --container-padding: var(--spacing-6);
  }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
  :root {
    --container-padding: var(--spacing-8);
  }
}

/* Extra large devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
  .container {
    padding: 0 var(--spacing-10);
  }
}