/* ═══════════════════════════════════════════════════════════
   PORTFOLIO — CSS COMPLET
   Stack design: Dark tech / minimaliste / premium
   Fonts: Syne (display) + JetBrains Mono (code)
═══════════════════════════════════════════════════════════ */

/* ─── VARIABLES ─────────────────────────────────────────── */
:root {
  --bg:           #080c10;
  --bg-1:         #0d1117;
  --bg-2:         #111820;
  --bg-card:      #0f1620;
  --border:       rgba(255,255,255,0.07);
  --border-hover: rgba(99,179,237,0.3);
  --text:         #e2e8f0;
  --text-muted:   #64748b;
  --text-dim:     #8899aa;
  --accent:       #3b9eff;
  --accent-dim:   rgba(59,158,255,0.15);
  --accent-glow:  rgba(59,158,255,0.4);
  --green:        #00d68f;
  --red:          #ff5c5c;
  --yellow:       #f5c518;
  --radius:       8px;
  --radius-lg:    16px;
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-display: 'Syne', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
}

/* ─── RESET ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: var(--font-mono); }

/* ─── SCROLLBAR ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }

/* ─── CONTAINER ─────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── SECTION BASE ──────────────────────────────────────── */
.section { padding: 100px 0; }
.section-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 48px;
  color: var(--text);
}
.accent { color: var(--accent); }

/* ─── REVEAL ANIMATIONS ─────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ─── BUTTONS ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  border: 2px solid var(--accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-sm { padding: 8px 20px; font-size: 0.8rem; }
.btn-full { width: 100%; justify-content: center; }

/* ════════════════════════════════════════════════════════════
   NAV
════════════════════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, border-bottom 0.4s;
}
#navbar.scrolled {
  background: rgba(8, 12, 16, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo-bracket { color: var(--text-muted); }
.logo-accent { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 0.82rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover, .nav-links a:hover::after { color: var(--text); width: 100%; }
.nav-cta {
  padding: 7px 18px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent) !important;
}
.nav-cta:hover { background: var(--accent-dim); }
.nav-burger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.nav-burger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--text);
  transition: var(--transition);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-menu.open { opacity: 1; pointer-events: all; }
.mobile-menu ul { text-align: center; }
.mobile-menu li { margin: 24px 0; }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
}
.mobile-menu a:hover { color: var(--accent); }

/* ════════════════════════════════════════════════════════════
   HERO
════════════════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 120px 24px 80px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}
.hero-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,158,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,158,255,0.04) 1px, transparent 1px);
  background-size: 50px 50px;
}
.hero-glow {
  position: absolute;
  top: -200px; left: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(59,158,255,0.06) 0%, transparent 70%);
  border-radius: 50%;
  animation: glow-move 8s ease-in-out infinite alternate;
}
@keyframes glow-move {
  to { transform: translate(200px, 100px); }
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,214,143,0.1);
  border: 1px solid rgba(0,214,143,0.25);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.75rem;
  color: var(--green);
  margin-bottom: 24px;
}
.tag-dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.08;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.title-accent { color: var(--accent); }
.hero-subtitle {
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 460px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}
.stat { text-align: left; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-plus { font-size: 1.2rem; }
.stat-label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.stat-divider {
  width: 1px; height: 40px;
  background: var(--border);
}

/* Terminal */
.hero-terminal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 0 40px rgba(59,158,255,0.08), 0 20px 60px rgba(0,0,0,0.5);
}
.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border);
}
.t-dot { width: 10px; height: 10px; border-radius: 50%; }
.t-dot.red { background: var(--red); }
.t-dot.yellow { background: var(--yellow); }
.t-dot.green { background: var(--green); }
.t-title {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-left: 8px;
}
.terminal-body { padding: 20px; }
.t-line {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 2;
  color: var(--text);
}
.t-prompt { color: var(--accent); margin-right: 8px; }
.t-output { color: var(--text-dim); padding-left: 16px; }
.t-accent { color: var(--accent); }
.t-cursor {
  animation: blink 1s step-end infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

/* ════════════════════════════════════════════════════════════
   ABOUT
════════════════════════════════════════════════════════════ */
.about { background: var(--bg-1); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: start;
}
.about-text p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 16px;
  max-width: 560px;
}
.about-philosophy {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  padding: 20px;
  border-left: 2px solid var(--accent);
  background: var(--accent-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.phi-icon {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  flex-shrink: 0;
}
.about-philosophy p {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
  margin: 0;
}
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: sticky;
  top: 100px;
}
.card-inner { padding: 0; }
.card-section {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.card-section:last-child { border-bottom: none; }
.card-section h4 {
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.card-section li {
  font-size: 0.82rem;
  color: var(--text-dim);
  padding: 3px 0;
}
.card-section li::before { content: '→ '; color: var(--accent); font-size: 0.7rem; }

/* ════════════════════════════════════════════════════════════
   SKILLS
════════════════════════════════════════════════════════════ */
.skills { background: var(--bg); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.skill-category:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 20px rgba(59,158,255,0.06);
}
.cat-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  display: inline-block;
  background: rgba(59,158,255,0.1);
  border: 1px solid rgba(59,158,255,0.2);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  transition: var(--transition);
  cursor: default;
}
.pill:hover {
  background: rgba(59,158,255,0.2);
  border-color: var(--accent);
}

/* ════════════════════════════════════════════════════════════
   PROJECTS
════════════════════════════════════════════════════════════ */
.projects { background: var(--bg-1); }
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 32px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 40px rgba(59,158,255,0.07);
}
.project-card.featured {
  border-color: rgba(59,158,255,0.2);
  background: linear-gradient(135deg, var(--bg-card), rgba(59,158,255,0.04));
}
.project-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.project-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid rgba(59,158,255,0.2);
}
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ptag {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 4px;
}
.project-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.featured-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  background: var(--accent);
  color: #000;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.project-desc {
  color: var(--text-dim);
  font-size: 0.88rem;
  margin-bottom: 24px;
  max-width: 700px;
  line-height: 1.8;
}
.project-highlights { margin-bottom: 24px; }
.highlight {
  display: flex;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.highlight:last-child { border-bottom: none; }
.h-icon {
  color: var(--accent);
  font-size: 0.6rem;
  margin-top: 5px;
  flex-shrink: 0;
}
.highlight strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text);
  margin-bottom: 4px;
}
.highlight p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}
.project-stats {
  display: flex;
  gap: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.pstat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent);
}
.pstat span {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* Architecture diagram */
.project-architecture {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}
.arch-title {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.arch-diagram {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.arch-node {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  font-size: 0.75rem;
  color: var(--text-dim);
}
.arch-node.accent { border-color: var(--accent); color: var(--accent); }
.arch-arrow { color: var(--text-muted); font-size: 0.8rem; }
.arch-side {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.arch-side span {
  font-size: 0.72rem;
  color: var(--text-muted);
}
.arch-side span::before { content: '  ├ '; color: var(--accent); }
.arch-side span:last-child::before { content: '  └ '; }

/* Book card */
.book-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items: center;
}
.book-3d {
  position: relative;
  width: 120px;
  height: 170px;
  transform-style: preserve-3d;
  transform: perspective(600px) rotateY(-20deg);
  transition: transform 0.5s ease;
}
.book-card:hover .book-3d { transform: perspective(600px) rotateY(-5deg); }
.book-face {
  width: 120px;
  height: 170px;
  background: linear-gradient(135deg, #1a2a4a, #0d1a33);
  border-radius: 2px 6px 6px 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(59,158,255,0.2);
  box-shadow: 0 10px 40px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
}
.book-cover-inner { text-align: center; padding: 16px; }
.book-cover-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 8px;
}
.book-cover-sub {
  font-size: 0.55rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.book-spine {
  position: absolute;
  left: -12px; top: 0;
  width: 12px; height: 170px;
  background: linear-gradient(to right, #091525, #1a2a4a);
  border-radius: 2px 0 0 2px;
  transform: rotateY(90deg) translateZ(0) translateX(-6px);
  transform-origin: right;
}

/* ════════════════════════════════════════════════════════════
   TIMELINE
════════════════════════════════════════════════════════════ */
.timeline-section { background: var(--bg); }
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.tl-item {
  position: relative;
  margin-bottom: 48px;
}
.tl-item:last-child { margin-bottom: 0; }
.tl-dot {
  position: absolute;
  left: -28px;
  top: 6px;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
}
.tl-date {
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.tl-content h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.tl-content p {
  font-size: 0.83rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
}

/* ════════════════════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════════════════════ */
.contact { background: var(--bg-1); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-text p {
  color: var(--text-dim);
  font-size: 0.88rem;
  margin-bottom: 32px;
  max-width: 380px;
  line-height: 1.8;
}
.contact-infos { display: flex; flex-direction: column; gap: 16px; }
.contact-info-item { display: flex; flex-direction: column; gap: 4px; }
.ci-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.contact-info-item a {
  font-size: 0.85rem;
  color: var(--text);
}
.contact-info-item a:hover { color: var(--accent); }
.available-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--green);
}
.avail-dot {
  width: 7px; height: 7px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

/* Form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,158,255,0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.82rem;
  text-align: center;
}
.form-status.success {
  background: rgba(0,214,143,0.1);
  border: 1px solid rgba(0,214,143,0.25);
  color: var(--green);
}
.form-status.error {
  background: rgba(255,92,92,0.1);
  border: 1px solid rgba(255,92,92,0.25);
  color: var(--red);
}

/* ════════════════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════════════════ */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 48px 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
}
.footer-brand .nav-logo { font-size: 1rem; }
.footer-brand p {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 6px;
}
.footer-links {
  display: flex;
  gap: 28px;
}
.footer-links a {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.footer-links a:hover { color: var(--accent); }
.footer-copy { text-align: right; }
.footer-copy p {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: left;
    padding-top: 100px;
  }
  .hero-terminal { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .about-card { position: static; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; gap: 20px; }
  .footer-copy { text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 600px) {
  .section { padding: 70px 0; }
  .nav-links { display: none; }
  .nav-burger { display: flex; }
  .skills-grid { grid-template-columns: 1fr; }
  .project-card { padding: 24px; }
  .book-layout { grid-template-columns: 1fr; text-align: center; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
  .stat-divider { display: none; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}