/* ══════════════════════════════════════════════
   ONYX & ELECTRIC — Design System
   Tek Chand Sharma Portfolio CSS
   ══════════════════════════════════════════════ */

/* 1. DESIGN TOKENS */
:root {
  --clr-bg:          #0A0C10;
  --clr-surface:     #111318;
  --clr-surface-2:   #16191F;
  --clr-border:      rgba(255,255,255,0.07);
  --clr-accent:      #00E5FF;
  --clr-accent-dim:  rgba(0,229,255,0.12);
  --clr-accent-glow: rgba(0,229,255,0.35);
  --clr-text:        #E8EAF0;
  --clr-text-muted:  #6B7280;
  --clr-success:     #10B981;
  --clr-error:       #EF4444;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'Fira Code', monospace;
  --radius-sm: 0.375rem; --radius-md: 0.75rem;
  --radius-lg: 1.25rem;  --radius-xl: 2rem;
  --radius-full: 9999px;
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 0.15s; --dur-med: 0.3s; --dur-slow: 0.6s;
  --shadow-glow: 0 0 40px rgba(0,229,255,0.35);
  --nav-h: 70px;
}

/* 2. RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  font-family: var(--font-sans);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }

/* 3. NOISE */
.noise-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 4. CURSOR */
@media (pointer: fine) {
  body { cursor: none; }
  .cursor {
    position: fixed; width: 8px; height: 8px;
    background: var(--clr-accent); border-radius: 50%;
    pointer-events: none; z-index: 10000;
    transform: translate(-50%,-50%); mix-blend-mode: screen;
    transition: width var(--dur-fast), height var(--dur-fast);
  }
  .cursor-follower {
    position: fixed; width: 36px; height: 36px;
    border: 1.5px solid var(--clr-accent); border-radius: 50%;
    pointer-events: none; z-index: 9999;
    transform: translate(-50%,-50%); opacity: 0.5;
    transition: transform 0.12s var(--ease-out), width var(--dur-med), height var(--dur-med);
  }
  .cursor.is-hovered { width: 16px; height: 16px; }
  .cursor-follower.is-hovered { width: 60px; height: 60px; opacity: 0.2; }
}

/* 5. SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-accent); border-radius: var(--radius-full); }
::selection { background: var(--clr-accent); color: var(--clr-bg); }

/* 6. BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.4rem; border-radius: var(--radius-full);
  font-size: 0.875rem; font-weight: 600; letter-spacing: 0.02em;
  transition: all var(--dur-med) var(--ease-out);
  position: relative; overflow: hidden; white-space: nowrap;
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(255,255,255,0.08); opacity: 0;
  transition: opacity var(--dur-fast);
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--clr-accent); color: var(--clr-bg);
  box-shadow: 0 0 20px rgba(0,229,255,0.3);
}
.btn-primary:hover { box-shadow: 0 0 35px rgba(0,229,255,0.55); transform: translateY(-2px); }
.btn-ghost {
  background: transparent; color: var(--clr-accent);
  border: 1.5px solid var(--clr-accent);
}
.btn-ghost:hover { background: var(--clr-accent-dim); transform: translateY(-2px); }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }

/* 7. NAVBAR */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  z-index: 1000; transition: background var(--dur-med), box-shadow var(--dur-med);
}
.navbar.scrolled {
  background: rgba(10,12,16,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--clr-border), 0 8px 32px rgba(0,0,0,0.4);
}
.nav-container {
  max-width: 1180px; margin: 0 auto; padding: 0 2rem; height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
}
.nav-logo {
  font-family: var(--font-mono); font-size: 1.2rem; font-weight: 700; line-height: 1;
  transition: filter var(--dur-med);
}
.nav-logo:hover { filter: drop-shadow(0 0 8px var(--clr-accent)); }
.logo-bracket { color: var(--clr-accent); }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-link {
  font-size: 0.875rem; font-weight: 500; color: var(--clr-text-muted);
  position: relative; padding-bottom: 2px; transition: color var(--dur-med);
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
  background: var(--clr-accent); border-radius: var(--radius-full);
  transition: width var(--dur-med) var(--ease-out);
}
.nav-link:hover, .nav-link.active { color: var(--clr-accent); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 1rem; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; justify-content: space-between; width: 24px; height: 18px; }
.bar {
  display: block; width: 100%; height: 2px; background: var(--clr-text);
  border-radius: var(--radius-full); transition: transform var(--dur-med) var(--ease-out), opacity var(--dur-med), background var(--dur-med);
}
.hamburger.is-active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.is-active .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.is-active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.hamburger.is-active .bar { background: var(--clr-accent); }
.mobile-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  z-index: 999; opacity: 0; pointer-events: none; transition: opacity var(--dur-med);
}
.mobile-overlay.is-active { opacity: 1; pointer-events: all; }

/* 8. SECTION BASE */
.section { padding: 5rem 0; }
.section-container { max-width: 1180px; margin: 0 auto; padding: 0 2rem; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-tag {
  display: inline-block; font-family: var(--font-mono); font-size: 0.8rem;
  font-weight: 500; color: var(--clr-accent); letter-spacing: 0.12em;
  text-transform: uppercase; margin-bottom: 0.5rem;
}
.section-title {
  font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--clr-text) 40%, var(--clr-text-muted));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* 9. HERO */
.hero {
  min-height: 100dvh; display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  padding: calc(var(--nav-h) + 2rem) 2rem 5rem;
}
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--clr-border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 20%, transparent 80%);
}
.hero::after {
  content: ''; position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
  width: 700px; height: 400px;
  background: radial-gradient(ellipse at center, rgba(0,229,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.particle {
  position: absolute; width: 2px; height: 2px; background: var(--clr-accent);
  border-radius: 50%; opacity: 0; animation: float-particle linear infinite;
}
@keyframes float-particle {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.6; } 90% { opacity: 0.2; }
  100% { transform: translateY(-20px) scale(1); opacity: 0; }
}
.hero-container { position: relative; z-index: 1; text-align: center; max-width: 820px; width: 100%; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 1rem; background: var(--clr-surface);
  border: 1px solid var(--clr-border); border-radius: var(--radius-full);
  font-size: 0.8rem; font-weight: 500; color: var(--clr-text-muted);
  margin-bottom: 2rem; animation: fade-slide-down 0.8s var(--ease-out) both;
}
.badge-dot {
  width: 8px; height: 8px; background: var(--clr-success);
  border-radius: 50%; position: relative;
}
.badge-dot::after {
  content: ''; position: absolute; inset: -3px; border-radius: 50%;
  background: var(--clr-success); opacity: 0.4; animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50% { transform: scale(1.8); opacity: 0; }
}
.hero-name {
  display: flex; flex-direction: column; align-items: center;
  font-size: clamp(3rem, 9vw, 6rem); font-weight: 900; letter-spacing: -0.04em;
  line-height: 1.05; margin-bottom: 1.5rem;
  animation: fade-slide-down 0.9s 0.1s var(--ease-out) both;
}
.name-line { display: block; }
.name-line.accent { color: var(--clr-accent); text-shadow: 0 0 60px rgba(0,229,255,0.4); }
.hero-role {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem); color: var(--clr-text-muted);
  margin-bottom: 1.5rem; animation: fade-slide-down 1s 0.2s var(--ease-out) both;
  font-family: var(--font-mono);
}
.role-prefix { margin-right: 0.4em; }
.role-typed { color: var(--clr-accent); }
.role-cursor { color: var(--clr-accent); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.15rem); color: var(--clr-text-muted);
  max-width: 520px; margin: 0 auto 3rem;
  animation: fade-slide-down 1.1s 0.3s var(--ease-out) both;
}
.hero-tagline strong { color: var(--clr-text); font-weight: 600; }
.hero-ctas {
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem;
  animation: fade-slide-down 1.2s 0.4s var(--ease-out) both;
}
.hero-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 2rem; flex-wrap: wrap;
  animation: fade-slide-down 1.3s 0.5s var(--ease-out) both;
}
.stat-card { text-align: center; }
.stat-num {
  display: block; font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 800;
  color: var(--clr-accent); line-height: 1; letter-spacing: -0.02em;
}
.stat-label {
  display: block; font-size: 0.75rem; font-weight: 500; color: var(--clr-text-muted);
  letter-spacing: 0.05em; text-transform: uppercase; margin-top: 0.25rem;
}
.stat-divider { width: 1px; height: 40px; background: var(--clr-border); }
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--clr-text-muted);
  animation: scroll-bounce 2s ease-in-out infinite, fade-slide-down 1.5s 1s var(--ease-out) both;
}
.scroll-mouse {
  width: 22px; height: 36px; border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-full); display: flex; justify-content: center; padding-top: 6px;
}
.scroll-wheel {
  width: 4px; height: 8px; background: var(--clr-accent);
  border-radius: var(--radius-full); animation: scroll-wheel 2s ease-in-out infinite;
}
@keyframes scroll-wheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* 10. ABOUT */
.about { background: linear-gradient(180deg, var(--clr-bg), var(--clr-surface)); }
.about-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 4rem; align-items: start; }
.about-visual { display: flex; flex-direction: column; gap: 2rem; align-items: center; }
.about-avatar-wrap { position: relative; width: 280px; height: 280px; }
.avatar-ring {
  position: absolute; inset: -6px; border-radius: var(--radius-lg);
  background: conic-gradient(from 0deg, var(--clr-accent), transparent 40%, var(--clr-accent) 60%, transparent 80%, var(--clr-accent));
  animation: spin 6s linear infinite; opacity: 0.5;
}
@keyframes spin { to { transform: rotate(360deg); } }
.avatar-inner {
  position: relative; width: 100%; height: 100%;
  background: var(--clr-surface-2); border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.avatar-code { padding: 1.5rem; font-family: var(--font-mono); font-size: 0.72rem; line-height: 1.9; }
.avatar-code pre { margin: 0; }
.c-keyword { color: #C792EA; } .c-class { color: #FFCB6B; }
.c-prop { color: #82AAFF; }   .c-string { color: #C3E88D; }
.c-num { color: var(--clr-accent); } .c-fn { color: #89DDFF; }
.about-links { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }
.social-link {
  display: flex; align-items: center; gap: 0.25rem;
  padding: 0.5rem 1rem; background: var(--clr-surface-2);
  border: 1px solid var(--clr-border); border-radius: var(--radius-full);
  font-size: 0.8rem; font-weight: 500; color: var(--clr-text-muted);
  transition: all var(--dur-med) var(--ease-out);
}
.social-link i { font-size: 1rem; }
.social-link:hover {
  border-color: var(--clr-accent); color: var(--clr-accent);
  background: var(--clr-accent-dim); transform: translateY(-2px);
}
.about-greeting { font-size: 1.6rem; font-weight: 700; margin-bottom: 1.5rem; letter-spacing: -0.02em; }
.about-bio { color: var(--clr-text-muted); margin-bottom: 1rem; font-size: 1rem; line-height: 1.8; }
.about-bio strong { color: var(--clr-text); font-weight: 600; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-top: 2rem; }
.highlight-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; color: var(--clr-text-muted); }
.highlight-item i { color: var(--clr-accent); font-size: 1.1rem; flex-shrink: 0; }

/* 11. SKILLS */
.skills { background: var(--clr-surface); }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; }
.skill-card {
  background: var(--clr-surface-2); border: 1px solid var(--clr-border);
  border-radius: var(--radius-md); padding: 1.5rem 1rem; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  font-size: 0.85rem; font-weight: 500; color: var(--clr-text-muted);
  transition: all var(--dur-med) var(--ease-out); cursor: default; position: relative; overflow: hidden;
}
.skill-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--clr-accent); transform: scaleX(0); transition: transform var(--dur-med) var(--ease-out);
}
.skill-card:hover {
  border-color: var(--clr-accent); color: var(--clr-text);
  transform: translateY(-4px); box-shadow: var(--shadow-glow);
}
.skill-card:hover::before { transform: scaleX(1); }
.skill-icon { font-size: 2rem; line-height: 1; transition: transform var(--dur-med); }
.skill-card:hover .skill-icon { transform: scale(1.1); }

/* 12. TIMELINE */
.experience { background: var(--clr-bg); }
.timeline { position: relative; padding-left: 2.5rem; }
.timeline::before {
  content: ''; position: absolute; left: 12px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--clr-accent) 0%, transparent 100%);
}
.timeline-item { position: relative; margin-bottom: 3rem; }
.timeline-item::before {
  content: ''; position: absolute; left: -2.5rem; top: 8px;
  width: 10px; height: 10px; border-radius: 50%; background: var(--clr-accent);
  box-shadow: 0 0 12px rgba(0,229,255,0.35); border: 2px solid var(--clr-bg);
}
.timeline-card {
  background: var(--clr-surface); border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: border-color var(--dur-med), box-shadow var(--dur-med);
}
.timeline-card:hover { border-color: rgba(0,229,255,0.3); box-shadow: 0 4px 32px rgba(0,229,255,0.07); }
.timeline-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap;
}
.timeline-role { font-size: 1.1rem; font-weight: 700; color: var(--clr-text); letter-spacing: -0.01em; }
.timeline-company {
  display: inline-block; font-size: 0.8rem; font-weight: 600; color: var(--clr-accent);
  background: var(--clr-accent-dim); padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full); margin-top: 0.25rem;
}
.timeline-period { font-family: var(--font-mono); font-size: 0.75rem; color: var(--clr-text-muted); white-space: nowrap; padding-top: 4px; }
.timeline-desc { color: var(--clr-text-muted); font-size: 0.9rem; line-height: 1.75; }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-top: 1rem; }
.tag {
  font-size: 0.72rem; font-weight: 600; color: var(--clr-text-muted);
  background: var(--clr-surface-2); border: 1px solid var(--clr-border);
  padding: 0.2rem 0.6rem; border-radius: var(--radius-full); letter-spacing: 0.03em;
}

/* 13. CONTACT */
.contact { background: linear-gradient(180deg, var(--clr-surface), var(--clr-bg)); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 4rem; align-items: start; }
.contact-desc { color: var(--clr-text-muted); font-size: 1rem; line-height: 1.8; margin-bottom: 3rem; }
.contact-channels { display: flex; flex-direction: column; gap: 1rem; }
.channel-item {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.5rem; background: var(--clr-surface);
  border: 1px solid var(--clr-border); border-radius: var(--radius-md);
  transition: all var(--dur-med) var(--ease-out);
}
.channel-item:hover { border-color: var(--clr-accent); background: var(--clr-accent-dim); transform: translateX(4px); }
.channel-item i { font-size: 1.5rem; color: var(--clr-accent); flex-shrink: 0; }
.channel-label { display: block; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--clr-text-muted); }
.channel-val { display: block; font-size: 0.9rem; font-weight: 500; color: var(--clr-text); }
.contact-form {
  background: var(--clr-surface); border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl); padding: 2.5rem;
  display: flex; flex-direction: column; gap: 1.5rem;
}
.form-group { display: flex; flex-direction: column; gap: 0.25rem; }
.form-group label {
  font-size: 0.8rem; font-weight: 600; color: var(--clr-text-muted);
  letter-spacing: 0.05em; text-transform: uppercase;
}
.form-group input, .form-group textarea {
  background: var(--clr-bg); border: 1px solid var(--clr-border);
  border-radius: var(--radius-md); padding: 0.85rem 1rem;
  font-family: var(--font-sans); font-size: 0.95rem; color: var(--clr-text);
  transition: border-color var(--dur-med), box-shadow var(--dur-med);
  resize: vertical; outline: none; width: 100%;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--clr-text-muted); }
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--clr-accent); box-shadow: 0 0 0 3px rgba(0,229,255,0.12);
}
.form-group input.is-error, .form-group textarea.is-error {
  border-color: var(--clr-error); box-shadow: 0 0 0 3px rgba(239,68,68,0.12);
}

/* 14. TOAST */
.toast-container {
  position: fixed; top: 1.5rem; right: 1.5rem; z-index: 9000;
  display: flex; flex-direction: column; gap: 0.5rem; pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 1rem; padding: 1rem 1.25rem;
  border-radius: var(--radius-md); font-size: 0.875rem; font-weight: 500;
  pointer-events: all; min-width: 280px; max-width: 400px;
  box-shadow: 0 8px 48px rgba(0,0,0,0.7);
  animation: toast-in 0.4s var(--ease-spring) both; position: relative; overflow: hidden;
}
.toast.is-leaving { animation: toast-out 0.3s var(--ease-out) forwards; }
.toast-success { background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.4); color: var(--clr-success); }
.toast-error   { background: rgba(239,68,68,0.15);  border: 1px solid rgba(239,68,68,0.4);  color: var(--clr-error); }
.toast i { font-size: 1.2rem; flex-shrink: 0; }
.toast-msg { color: var(--clr-text); flex: 1; }
.toast-close { background: none; border: none; color: var(--clr-text-muted); cursor: pointer; font-size: 1rem; display: flex; align-items: center; }
.toast-close:hover { color: var(--clr-text); }
.toast-progress { position: absolute; bottom: 0; left: 0; height: 3px; background: currentColor; animation: toast-progress 4s linear forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateY(-16px) scale(0.95); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes toast-out { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(120%); } }
@keyframes toast-progress { from { width: 100%; } to { width: 0%; } }

/* 15. FOOTER */
.footer { border-top: 1px solid var(--clr-border); padding: 2rem 0; }
.footer-container {
  max-width: 1180px; margin: 0 auto; padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.footer-copy { font-size: 0.82rem; color: var(--clr-text-muted); }
.footer-links { display: flex; gap: 1rem; }
.footer-links a { color: var(--clr-text-muted); font-size: 1.25rem; transition: color var(--dur-med), transform var(--dur-med); }
.footer-links a:hover { color: var(--clr-accent); transform: translateY(-2px); }

/* 16. REVEAL */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* 17. ACCENT */
.accent { color: var(--clr-accent); }

/* 18. SHARED KEYFRAMES */
@keyframes fade-slide-down {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 19. RESPONSIVE — tablet */
@media (max-width: 900px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-visual { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .timeline { padding-left: 2rem; }
  .timeline::before { left: 6px; }
  .timeline-item::before { left: -2rem; }
}

/* 20. RESPONSIVE — mobile */
@media (max-width: 640px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: var(--clr-surface); flex-direction: column; justify-content: center;
    align-items: center; gap: 3rem; transform: translateX(100%);
    transition: transform var(--dur-slow) var(--ease-out); z-index: 1000;
  }
  .nav-links.is-open { transform: translateX(0); }
  .nav-link { font-size: 1.5rem; }
  #nav-cta-btn { display: none; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .btn-lg { width: 100%; max-width: 280px; justify-content: center; }
  .about-highlights { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
  .timeline-header { flex-direction: column; gap: 0.5rem; }
  .contact-form { padding: 2rem; }
  .toast-container { top: 1rem; right: 1rem; left: 1rem; }
  .toast { min-width: unset; max-width: unset; }
  .footer-container { flex-direction: column; text-align: center; }
  .hero-stats { gap: 1.5rem; }
  .stat-divider { height: 30px; }
}