/* ========================================
   PORTFOLIO DESIGN SYSTEM
   Dark Theme | Neon Green Accent
   ======================================== */

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

/* ── CSS Variables ── */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: #0f0f0f;
  --bg-card-hover: #161616;
  --border-color: #1e1e1e;
  --border-glow: rgba(0, 255, 136, 0.15);

  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;

  --accent: #00ff88;
  --accent-dim: rgba(0, 255, 136, 0.1);
  --accent-medium: rgba(0, 255, 136, 0.25);
  --accent-secondary: #00d4ff;
  --accent-secondary-dim: rgba(0, 212, 255, 0.1);

  --gradient-accent: linear-gradient(135deg, #00ff88, #00d4ff);
  --gradient-bg: linear-gradient(135deg, rgba(0,255,136,0.05), rgba(0,212,255,0.05));

  --font-body: 'Inter', -apple-system, sans-serif;
  --font-heading: 'Poppins', sans-serif;
  --font-mono: 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(0,255,136,0.08);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --nav-height: 70px;
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent-medium);
  color: #fff;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* ── Navigation ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.95);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.nav-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.5px;
}

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

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
  z-index: 1001;
}

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

.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);
}

/* ── Section Base ── */
.section {
  padding: 100px 0;
  position: relative;
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

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

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

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(0,255,136,0.04) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(0,212,255,0.03) 0%, transparent 50%);
  animation: heroBgMove 20s ease-in-out infinite alternate;
}

@keyframes heroBgMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-3%, -2%); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-greeting::before {
  content: '>';
  opacity: 0.5;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
}

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

.hero-title {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-title .cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  animation: blink 1s infinite;
  vertical-align: middle;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
}

.btn-primary:hover {
  background: #33ff99;
  color: #0a0a0a;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,255,136,0.3);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

.btn-ghost {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background: var(--accent-medium);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
}

/* ── About Section ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.9;
}

.about-detail-cards {
  display: grid;
  gap: 16px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.about-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.about-card-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.about-card h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

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

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

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}

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

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.skill-category-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
}

.skill-category h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
}

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

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 6px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-secondary);
  transition: var(--transition);
}

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

/* ── Tools Grid ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
}

.tool-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: default;
}

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

.tool-icon {
  font-size: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-item span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
}

/* ── Project Cards ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.project-card-header {
  padding: 28px 28px 0;
}

.project-card-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.project-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-card-body {
  padding: 0 28px;
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
}

.project-card-footer {
  padding: 20px 28px 28px;
  display: flex;
  gap: 10px;
  margin-top: auto;
}

/* ── Experience Timeline ── */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

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

.timeline-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 48px;
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  border-radius: 50%;
  z-index: 1;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.timeline-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.timeline-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-card .timeline-org {
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.timeline-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.timeline-card ul {
  margin-top: 10px;
}

.timeline-card ul li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}

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

/* ── Achievements ── */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.achievement-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  display: flex;
  gap: 16px;
  align-items: start;
}

.achievement-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.achievement-icon {
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.achievement-card h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.achievement-card p {
  font-size: 0.83rem;
  color: var(--text-secondary);
}

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

.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.8;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: var(--transition);
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.contact-link-icon {
  font-size: 1.1rem;
  width: 32px;
  text-align: center;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

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

.form-status {
  font-size: 0.85rem;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(0,255,136,0.1);
  color: var(--accent);
  border: 1px solid rgba(0,255,136,0.2);
}

.form-status.error {
  display: block;
  background: rgba(255,68,68,0.1);
  color: #ff4444;
  border: 1px solid rgba(255,68,68,0.2);
}

/* ── Footer ── */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: var(--transition);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.footer-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

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

.footer-copy span {
  color: var(--accent);
}

/* ── Blog Cards ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.blog-card-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.blog-card-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 10px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.blog-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.blog-card .read-more {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 6px;
}

.blog-card .read-more:hover {
  gap: 10px;
}

/* ── Blog Post Page ── */
.blog-post {
  max-width: 780px;
  margin: 0 auto;
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 100px;
}

.blog-post-header {
  margin-bottom: 40px;
}

.blog-post-header h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.blog-post-meta {
  display: flex;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.blog-post-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-secondary);
}

.blog-post-content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 40px 0 16px;
}

.blog-post-content h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 12px;
}

.blog-post-content p {
  margin-bottom: 20px;
}

.blog-post-content code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  background: var(--bg-tertiary);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.blog-post-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
}

.blog-post-content pre code {
  background: none;
  border: none;
  padding: 0;
}

.blog-post-content ul,
.blog-post-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.blog-post-content ul li,
.blog-post-content ol li {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.blog-post-content ul li {
  list-style: disc;
}

.blog-post-content ol li {
  list-style: decimal;
}

.blog-post-content img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin: 24px 0;
}

/* ── Project Detail Page ── */
.project-detail {
  max-width: 860px;
  margin: 0 auto;
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 100px;
}

.project-detail-header {
  margin-bottom: 40px;
}

.project-detail-header h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.project-detail-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.project-detail-section {
  margin-bottom: 40px;
}

.project-detail-section h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.project-detail-section h2::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--accent);
  border-radius: 2px;
}

.project-detail-section p,
.project-detail-section li {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
}

.project-detail-section ul {
  padding-left: 20px;
}

.project-detail-section ul li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 16px;
}

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

.project-screenshots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.project-screenshots img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.project-screenshots img:hover {
  border-color: var(--accent);
  transform: scale(1.02);
}

/* ── Resume Page ── */
.resume-container {
  max-width: 860px;
  margin: 0 auto;
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 100px;
  text-align: center;
}

.resume-container h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.resume-container .resume-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.resume-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 48px;
}

.resume-preview {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
}

.resume-preview iframe {
  width: 100%;
  height: 700px;
  border: none;
  border-radius: var(--radius-lg);
}

/* ── Page Header (for subpages) ── */
.page-header {
  padding: calc(var(--nav-height) + 60px) 0 40px;
  text-align: center;
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 300px;
  background: var(--gradient-bg);
  pointer-events: none;
}

.page-header h1 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
}

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

/* ── Filter Buttons ── */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ── Scroll Animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ──  Back Link ── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 32px;
  transition: var(--transition);
}

.back-link:hover {
  color: var(--accent);
  gap: 10px;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero-name {
    font-size: 3rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    padding: 80px 24px 24px;
    gap: 4px;
    transition: var(--transition);
  }

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

  .nav-links a {
    width: 100%;
    padding: 12px 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-name {
    font-size: 2.2rem;
  }

  .hero-title {
    font-size: 0.95rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    text-align: center;
    justify-content: center;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.7rem;
  }

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

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  }

  .tool-item {
    padding: 16px 10px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .page-header h1 {
    font-size: 1.8rem;
  }

  .project-detail-header h1,
  .blog-post-header h1 {
    font-size: 1.6rem;
  }

  .resume-actions {
    flex-direction: column;
    align-items: center;
  }
}

/* ── Overlay for mobile nav ── */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ── Divider ── */
.section-divider {
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
  margin: 0 auto 48px;
}

/* ── Experience Page specific ── */
.exp-page-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

@media (max-width: 768px) {
  .exp-page-grid {
    grid-template-columns: 1fr;
  }
}

.exp-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}

.exp-stat-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.exp-stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.exp-stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}