/* ── Tokens ─────────────────────────────────────────── */
:root {
  --bg:          #09090b;
  --bg-2:        #0f0f12;
  --surface:     rgba(255,255,255,0.04);
  --surface-hover: rgba(255,255,255,0.07);
  --border:      rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);
  --text:        #fafafa;
  --text-muted:  #a1a1aa;
  --accent:      #6366f1;
  --accent-glow: rgba(99,102,241,0.35);
  --orb-1:       rgba(99,102,241,0.18);
  --orb-2:       rgba(139,92,246,0.14);

  --font-head:   'Archivo', sans-serif;
  --font-body:   'Space Grotesk', sans-serif;

  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;

  --ease-out:    cubic-bezier(0.16,1,0.3,1);
  --ease-in-out: cubic-bezier(0.4,0,0.2,1);
  --dur-fast:    150ms;
  --dur-mid:     250ms;
  --dur-slow:    400ms;
}

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── Layout helpers ─────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 64px);
}

.section { padding-block: clamp(80px, 12vw, 140px); }

/* ── Glass ──────────────────────────────────────────── */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
}

/* ── Buttons ────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--dur-mid) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
}
.btn-primary:hover {
  background: #7577f3;
  box-shadow: 0 0 36px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-ghost {
  background: var(--surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--text);
  transform: translateY(-1px);
}
.btn-lg { padding: 16px 32px; font-size: 1rem; }

/* ── Nav ────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background var(--dur-mid) var(--ease-in-out),
              border-color var(--dur-mid) var(--ease-in-out),
              padding var(--dur-mid) var(--ease-in-out);
}
.nav.scrolled {
  background: rgba(9,9,11,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.nav-inner {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  transition: opacity var(--dur-fast);
}
.nav-logo:hover { opacity: 0.8; }
.logo-mark {
  color: var(--accent);
  font-size: 1.1rem;
  line-height: 1;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--dur-fast);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-fast);
}

/* ── Hero ───────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-block: 120px 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: drift 12s ease-in-out infinite alternate;
}
.orb-1 {
  width: 600px;
  height: 600px;
  top: -20%;
  left: -10%;
  background: var(--orb-1);
  animation-duration: 14s;
}
.orb-2 {
  width: 500px;
  height: 500px;
  bottom: -15%;
  right: -10%;
  background: var(--orb-2);
  animation-duration: 10s;
  animation-delay: -4s;
}
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.08); }
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding-inline: 24px;
  animation: fadeUp var(--dur-slow) var(--ease-out) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 28px;
  animation: fadeUp var(--dur-slow) var(--ease-out) 100ms both;
}
.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px rgba(34,197,94,0.6);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.hero-heading {
  font-family: var(--font-head);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeUp var(--dur-slow) var(--ease-out) 180ms both;
}
.hero-heading em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: 40px;
  animation: fadeUp var(--dur-slow) var(--ease-out) 250ms both;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp var(--dur-slow) var(--ease-out) 320ms both;
}
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0.5;
  animation: fadeUp var(--dur-slow) var(--ease-out) 500ms both;
}
.scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(0.7); transform-origin: top; }
}

/* ── Section labels ─────────────────────────────────── */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-heading {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 24px;
}

/* ── About ──────────────────────────────────────────── */
.about { background: var(--bg-2); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}
.about-text p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 16px;
  max-width: 480px;
}
.about-text p em {
  color: var(--text);
  font-style: italic;
}
.about-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stat {
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color var(--dur-mid), background var(--dur-mid);
}
.stat:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}
.stat-num {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ── Work ───────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.project-card {
  padding: clamp(28px, 4vw, 40px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--dur-mid) var(--ease-out),
              background var(--dur-mid) var(--ease-out),
              transform var(--dur-mid) var(--ease-out);
  cursor: default;
}
.project-card:hover, .project-card:focus-visible {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
  outline: none;
}
.project-card--wide { grid-column: 1 / -1; }
.project-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 99px;
  padding: 4px 12px;
  align-self: flex-start;
}
.project-card h3 {
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.project-card p {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.6;
  flex: 1;
}
.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.project-link {
  color: var(--accent);
  font-weight: 600;
  transition: letter-spacing var(--dur-fast), color var(--dur-fast);
}
.project-link:hover { letter-spacing: 0.04em; color: #a78bfa; }

/* ── Contact ────────────────────────────────────────── */
.contact .container { display: flex; justify-content: center; }
.contact-inner {
  padding: clamp(48px, 8vw, 80px);
  text-align: center;
  max-width: 640px;
  width: 100%;
  position: relative;
  overflow: hidden;
}
.contact-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 0%, var(--accent-glow), transparent);
  pointer-events: none;
}
.contact-sub {
  color: var(--text-muted);
  margin-bottom: 36px;
  font-size: 1rem;
}

/* ── Footer ─────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 28px;
  background: var(--bg);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-logo {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.6;
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--dur-fast);
}
.footer-links a:hover { color: var(--text); }

/* ── Scroll reveal ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(9,9,11,0.96);
    backdrop-filter: blur(24px);
    justify-content: center;
    align-items: center;
    gap: 36px;
    z-index: 99;
  }
  .nav-links.open a { font-size: 1.5rem; color: var(--text); }
  .nav-toggle { display: flex; z-index: 101; }
  .nav-toggle.open span:first-child { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:last-child  { transform: translateY(-7px) rotate(-45deg); }

  .about-grid { grid-template-columns: 1fr; }
  .about-stats { flex-direction: row; flex-wrap: wrap; }
  .stat { flex: 1; min-width: 120px; }

  .projects-grid { grid-template-columns: 1fr; }
  .project-card--wide { grid-column: 1; }

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

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; max-width: 280px; }
}