/* ==========================================================================
   Portfolio Website - Futuristic/Cyber Theme
   Nitheesh Kumar Senthilnathan
   ========================================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&display=swap');

/* ==========================================================================
   1. Design Tokens
   ========================================================================== */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.05);
  --accent-green: #00ffab;
  --accent-cyan: #00e5ff;
  --accent-green-dim: rgba(0, 255, 171, 0.15);
  --accent-cyan-dim: rgba(0, 229, 255, 0.15);
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-heading: #ffffff;
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(0, 255, 171, 0.25);

  /* Typography */
  --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --nav-height: 70px;
  --container-max: 1100px;
  --section-padding: 5rem 2rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-blur: blur(12px);
  --glass-border: 1px solid var(--border-glass);
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--accent-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-cyan);
}

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */
h1, h2, h3, h4 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.1rem; }

.section-title {
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
  color: var(--accent-green);
  text-shadow: 0 0 10px rgba(0, 255, 171, 0.3), 0 0 40px rgba(0, 255, 171, 0.1);
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan));
  margin: 0.8rem auto 0;
  border-radius: 2px;
}

.glow-text {
  text-shadow: 0 0 10px rgba(0, 255, 171, 0.4), 0 0 40px rgba(0, 255, 171, 0.15);
}

.text-accent {
  color: var(--accent-green);
}

/* ==========================================================================
   4. Utility
   ========================================================================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   5. Navigation
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-glass);
  z-index: 1000;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: 1px;
}

.nav-logo .accent {
  color: var(--accent-green);
}

.nav-links {
  display: flex;
  gap: 1.8rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  position: relative;
  padding: 0.3rem 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-green);
  transition: width var(--transition-medium);
  border-radius: 1px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-green);
}

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

.nav-social {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav-social a {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-social a:hover {
  color: var(--accent-green);
  transform: translateY(-2px);
}

.nav-social svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-fast);
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.nav-toggle.open .hamburger {
  background: transparent;
}

.nav-toggle.open .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open .hamburger::after {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: calc(var(--nav-height) + 2rem) 2rem 4rem;
}

#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-green);
  box-shadow: 0 0 30px rgba(0, 255, 171, 0.2), 0 0 60px rgba(0, 255, 171, 0.1);
  margin-bottom: 1.5rem;
  animation: glow-pulse 3s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
  from { box-shadow: 0 0 20px rgba(0, 255, 171, 0.2), 0 0 40px rgba(0, 255, 171, 0.08); }
  to   { box-shadow: 0 0 35px rgba(0, 255, 171, 0.35), 0 0 70px rgba(0, 255, 171, 0.15); }
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-heading), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.2rem;
  color: var(--text-secondary);
  min-height: 1.8rem;
  margin-bottom: 2rem;
}

.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent-green);
  margin-left: 3px;
  vertical-align: text-bottom;
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-social {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.hero-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition-medium);
}

.hero-social a:hover {
  color: var(--accent-green);
  border-color: var(--accent-green);
  box-shadow: 0 0 20px rgba(0, 255, 171, 0.2);
  transform: translateY(-3px);
}

.hero-social svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s ease-in-out infinite;
  color: var(--text-secondary);
  z-index: 1;
}

.scroll-indicator svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(10px); }
}

/* ==========================================================================
   7. Sections
   ========================================================================== */
.section {
  padding: var(--section-padding);
  padding-top: calc(var(--nav-height) + 3rem);
  position: relative;
}

.page-section {
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 3rem);
}

/* ==========================================================================
   8. Glass Card
   ========================================================================== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: 15px;
  padding: 2rem;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 255, 171, 0.08);
  border-color: var(--border-glass-hover);
}

/* ==========================================================================
   9. About Section (Home page)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  max-width: var(--container-max);
  margin: 0 auto;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.highlight-item {
  text-align: center;
  padding: 1.5rem 1rem;
}

.highlight-item .number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-green);
  display: block;
}

.highlight-item .label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* ==========================================================================
   10. Timeline (Experience & Education)
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-green), var(--accent-cyan), transparent);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 45%;
  margin-bottom: 3rem;
}

.timeline-item:nth-child(odd) {
  margin-left: 5%;
}

.timeline-item:nth-child(even) {
  margin-left: 50%;
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 15px rgba(0, 255, 171, 0.4);
  z-index: 2;
}

.timeline-item:nth-child(odd)::before {
  right: -7%;
  transform: translateX(50%);
}

.timeline-item:nth-child(even)::before {
  left: -7%;
  transform: translateX(-50%);
}

.timeline-card {
  padding: 1.5rem;
}

.timeline-card .company-logo {
  width: 45px;
  height: 45px;
  border-radius: 10px;
  object-fit: contain;
  margin-bottom: 0.8rem;
  background: rgba(255,255,255,0.08);
  padding: 4px;
}

.timeline-card h3 {
  color: var(--accent-green);
  margin-bottom: 0.2rem;
  font-size: 1.15rem;
}

.timeline-card .company {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.timeline-card .meta {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
}

.timeline-card ul {
  list-style: none;
}

.timeline-card ul li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.timeline-card ul li::before {
  content: '\25B8';
  position: absolute;
  left: 0;
  color: var(--accent-green);
}

/* ==========================================================================
   11. Skills
   ========================================================================== */
.skills-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: var(--container-max);
  margin: 0 auto;
}

.skill-category h3 {
  color: var(--accent-green);
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-glass);
}

.skill-item {
  margin-bottom: 1.2rem;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.skill-header .skill-name {
  color: var(--text-primary);
}

.skill-header .skill-level {
  color: var(--text-secondary);
}

.skill-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan));
  border-radius: 3px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.skill-bar-fill.visible {
  /* width set via inline style */
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.skill-tag {
  padding: 0.35rem 0.9rem;
  border-radius: 20px;
  font-size: 0.8rem;
  background: var(--glass-bg);
  border: var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* ==========================================================================
   12. Project Cards
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: var(--container-max);
  margin: 0 auto;
}

.project-card {
  overflow: hidden;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
}

.project-card:hover {
  color: inherit;
}

.project-card-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.project-card:hover .project-card-image img {
  transform: scale(1.05);
}

.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 15, 0.9) 0%, transparent 60%);
  opacity: 0.7;
  transition: opacity var(--transition-medium);
}

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

.project-card-body {
  padding: 1.5rem;
}

.project-card-body h3 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
  color: var(--text-heading);
  transition: color var(--transition-fast);
}

.project-card:hover .project-card-body h3 {
  color: var(--accent-green);
}

.project-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tag {
  padding: 0.25rem 0.7rem;
  border-radius: 15px;
  font-size: 0.72rem;
  background: var(--accent-green-dim);
  color: var(--accent-green);
  font-weight: 500;
}

/* ==========================================================================
   13. Project Detail Page
   ========================================================================== */
.project-detail {
  padding: var(--section-padding);
  padding-top: calc(var(--nav-height) + 3rem);
  max-width: var(--container-max);
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--accent-green);
}

.project-detail h1 {
  color: var(--accent-green);
  text-shadow: 0 0 10px rgba(0, 255, 171, 0.3);
  margin-bottom: 0.5rem;
  font-size: 2.4rem;
}

.project-detail .project-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.project-detail-section {
  margin-bottom: 2.5rem;
}

.project-detail-section h2 {
  color: var(--accent-green);
  font-size: 1.4rem;
  margin-bottom: 1rem;
  text-shadow: 0 0 8px rgba(0, 255, 171, 0.15);
}

.project-detail-section h3 {
  color: var(--text-heading);
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.project-detail-section p {
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.project-detail-section ul {
  list-style: none;
}

.project-detail-section ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.project-detail-section ul li::before {
  content: '\25B8';
  position: absolute;
  left: 0;
  color: var(--accent-green);
}

.project-image {
  border-radius: 12px;
  border: 1px solid var(--border-glass);
  margin: 1.5rem 0;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.image-grid img {
  border-radius: 10px;
  border: 1px solid var(--border-glass);
  transition: transform var(--transition-fast);
}

.image-grid img:hover {
  transform: scale(1.02);
}

.two-col-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.two-col-images img {
  border-radius: 12px;
  border: 1px solid var(--border-glass);
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border-radius: 10px;
  overflow: hidden;
}

.data-table th,
.data-table td {
  padding: 0.8rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border-glass);
}

.data-table th {
  background: rgba(0, 255, 171, 0.08);
  color: var(--accent-green);
  font-weight: 600;
  font-size: 0.9rem;
}

.data-table td {
  color: var(--text-primary);
  font-size: 0.9rem;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Project Links */
.project-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border-radius: 25px;
  background: var(--glass-bg);
  border: var(--glass-border);
  color: var(--accent-green);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-medium);
}

.project-link:hover {
  border-color: var(--accent-green);
  box-shadow: 0 0 20px rgba(0, 255, 171, 0.15);
  transform: translateY(-2px);
  color: var(--accent-green);
}

.project-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ==========================================================================
   14. Blog
   ========================================================================== */
.blog-container {
  max-width: 800px;
  margin: 0 auto;
}

.blog-card {
  padding: 2.5rem;
}

.blog-card .blog-date {
  font-size: 0.82rem;
  color: var(--accent-green);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.blog-card h2 {
  margin-bottom: 1.5rem;
  color: var(--text-heading);
}

.blog-card p {
  margin-bottom: 1.2rem;
  color: var(--text-primary);
  line-height: 1.8;
}

.blog-card h3 {
  color: var(--accent-green);
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}

/* ==========================================================================
   15. Contact
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  max-width: var(--container-max);
  margin: 0 auto;
  align-items: start;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-info-item .icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--accent-green-dim);
  color: var(--accent-green);
  flex-shrink: 0;
}

.contact-info-item .icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.contact-info-item .details h4 {
  color: var(--text-heading);
  font-size: 0.95rem;
  margin-bottom: 0.1rem;
}

.contact-info-item .details p,
.contact-info-item .details a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.contact-social {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--glass-bg);
  border: var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition-medium);
}

.contact-social a:hover {
  color: var(--accent-green);
  border-color: var(--accent-green);
  box-shadow: 0 0 15px rgba(0, 255, 171, 0.15);
}

.contact-social svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-green);
  box-shadow: 0 0 15px rgba(0, 255, 171, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border: none;
  border-radius: 25px;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
  color: var(--bg-primary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-medium);
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 255, 171, 0.25);
}

/* ==========================================================================
   16. Footer
   ========================================================================== */
.footer {
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border-glass);
  text-align: center;
  margin-top: 3rem;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

.footer-social svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.82rem;
}

/* ==========================================================================
   17. Scroll Animations
   ========================================================================== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-left"] {
  transform: translateX(-30px);
}

[data-animate="fade-left"].visible {
  transform: translateX(0);
}

[data-animate="fade-right"] {
  transform: translateX(30px);
}

[data-animate="fade-right"].visible {
  transform: translateX(0);
}

[data-animate="scale"] {
  transform: scale(0.95);
}

[data-animate="scale"].visible {
  transform: scale(1);
}

/* ==========================================================================
   18. Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: calc(var(--nav-height) + 2rem) 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition-medium);
    border-left: 1px solid var(--border-glass);
  }

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

  .nav-links a {
    font-size: 1rem;
  }

  .nav-social {
    display: none;
  }

  /* Timeline responsive */
  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: calc(100% - 50px);
    margin-left: 50px;
  }

  .timeline-item::before,
  .timeline-item:nth-child(odd)::before,
  .timeline-item:nth-child(even)::before {
    left: -37px;
    transform: none;
  }

  /* About grid */
  .about-grid {
    grid-template-columns: 1fr;
  }

  /* Contact grid */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Projects grid */
  .projects-grid {
    grid-template-columns: 1fr;
  }

  /* Two col images */
  .two-col-images {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  html { font-size: 14px; }

  .hero h1 { font-size: 2.2rem; }
  .hero-photo { width: 140px; height: 140px; }

  .section-title { font-size: 1.8rem; }

  .glass-card { padding: 1.5rem; }

  .about-highlights {
    grid-template-columns: 1fr 1fr;
  }

  .skills-categories {
    grid-template-columns: 1fr;
  }
}