/* ============================================
   DEVELOPER PORTFOLIO — Dark Cyberpunk Theme
   Colors: Neon Green #00ff88, Cyan #00d4ff, 
           Hot Pink #ff0080, Dark #0a0a0f
   Fonts: JetBrains Mono, Inter
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ── CSS Custom Properties ── */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --text-primary: #e0e0e0;
  --text-secondary: #8888aa;
  --text-muted: #555577;
  --accent-green: #00ff88;
  --accent-cyan: #00d4ff;
  --accent-pink: #ff0080;
  --accent-purple: #8b5cf6;
  --border-color: #2a2a3e;
  --border-glow: rgba(0, 255, 136, 0.3);
  --gradient-primary: linear-gradient(135deg, #00ff88, #00d4ff);
  --gradient-hero: linear-gradient(135deg, #0a0a0f 0%, #12121a 50%, #1a1a2e 100%);
  --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --font-heading: 'JetBrains Mono', 'Fira Code', monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* Light mode */
[data-theme="light"] {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f5;
  --text-primary: #1a1a2e;
  --text-secondary: #555577;
  --text-muted: #8888aa;
  --accent-green: #00c96a;
  --accent-cyan: #0099cc;
  --border-color: #e0e0e8;
  --border-glow: rgba(0, 201, 106, 0.2);
  --shadow-glow: 0 0 20px rgba(0, 201, 106, 0.1);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --gradient-hero: linear-gradient(135deg, #f5f5f7 0%, #e8e8f0 50%, #ffffff 100%);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul { list-style: none; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--accent-green);
  border-radius: 4px;
}

/* ── Navigation ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

[data-theme="light"] .navbar {
  background: rgba(245, 245, 247, 0.85);
}

.navbar.scrolled {
  padding: 10px 0;
  box-shadow: var(--shadow-glow);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-green);
  letter-spacing: -0.5px;
}

.nav-logo span {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

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

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent-green);
  box-shadow: var(--shadow-glow);
  transform: rotate(20deg);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Hero Section ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 60% 80%, rgba(255, 0, 128, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

/* Grid Background */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 255, 136, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: 50px;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--accent-green);
  margin-bottom: 24px;
  animation: fadeInDown 0.6s ease forwards;
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

.hero h1 .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.4s;
  opacity: 0;
}

/* Typing animation container */
.typing-wrapper {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.3s;
  opacity: 0;
}

.typing-wrapper .cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent-green);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.6s;
  opacity: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #0a0a0f;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 255, 136, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* ── Section Styles ── */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ── About Section ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image .image-frame {
  width: 100%;
  aspect-ratio: 4/5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  position: relative;
}

.about-image .image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-image .image-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, var(--bg-primary));
  z-index: 1;
}

.about-image .floating-badge {
  position: absolute;
  bottom: -16px;
  right: -16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-card);
  z-index: 2;
}

.floating-badge .badge-number {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-green);
}

.floating-badge .badge-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

.about-text h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.stat-item {
  text-align: center;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.stat-item:hover {
  border-color: var(--accent-green);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-green);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Skills / Tech Stack ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.skill-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

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

.skill-card .skill-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.08);
  border-radius: var(--radius-sm);
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: var(--accent-green);
}

.skill-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.skill-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tags span {
  padding: 4px 12px;
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: 50px;
  font-size: 0.75rem;
  font-family: var(--font-heading);
  color: var(--accent-green);
}

/* ── Projects Grid ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 32px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.project-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
}

.project-image {
  width: 100%;
  height: 220px;
  background: var(--bg-secondary);
  overflow: hidden;
  position: relative;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.08);
}

.project-image .project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 15, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.project-overlay a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-green);
  color: #0a0a0f;
  border-radius: 50%;
  font-size: 1.1rem;
  transition: var(--transition);
}

.project-overlay a:hover {
  transform: scale(1.15);
}

.project-info {
  padding: 24px;
}

.project-info .project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.project-tags span {
  padding: 3px 10px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 50px;
  font-size: 0.7rem;
  font-family: var(--font-heading);
  color: var(--accent-cyan);
}

.project-info h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.project-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Contact Section ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-item .icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  color: var(--accent-green);
  flex-shrink: 0;
}

.contact-item span {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-links a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--accent-green);
  border-color: var(--accent-green);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-green);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

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

.form-status {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 16px;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  color: var(--accent-green);
}

.form-status.error {
  display: block;
  background: rgba(255, 0, 128, 0.1);
  border: 1px solid rgba(255, 0, 128, 0.3);
  color: var(--accent-pink);
}

.btn-submit {
  width: 100%;
  padding: 16px;
  font-size: 1rem;
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── Footer ── */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.footer a:hover {
  text-decoration: underline;
}

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--accent-green);
  color: #0a0a0f;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 15px rgba(0, 255, 136, 0.3);
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 25px rgba(0, 255, 136, 0.5);
}

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

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

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

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

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ── Page Header (for inner pages) ── */
.page-header {
  padding: 140px 0 60px;
  background: var(--gradient-hero);
  text-align: center;
  position: relative;
}

.page-header::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 255, 136, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.page-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

/* ── Timeline ── */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  padding-left: 40px;
  margin-bottom: 40px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 255, 136, 0.2);
}

.timeline-item .date {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.timeline-item h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.timeline-item .company {
  font-size: 0.9rem;
  color: var(--accent-green);
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    gap: 24px;
    border-left: 1px solid var(--border-color);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
  }

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

  .nav-links a {
    font-size: 1.1rem;
  }

  .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-buttons { flex-direction: column; }
  .about-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .section { padding: 60px 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .about-stats { grid-template-columns: 1fr; }
  .stat-item { padding: 16px; }
  .hero { padding-top: 100px; }
}