/* ============================
   DESIGN TOKENS — Nocturne
   ============================ */
:root {
  --color-bg: #161826;
  --color-surface: #232532;
  --color-text: #e9e9ed;
  --color-accent: #9184d9;
  --color-accent-2: #a7a1db;
  --color-divider: color-mix(in srgb, #e9e9ed 16%, transparent);

  --color-neutral-100: #f3f5fe;
  --color-neutral-200: #e4e7f5;
  --color-neutral-300: #cfd3e5;
  --color-neutral-400: #b2b6ca;
  --color-neutral-700: #595d6c;
  --color-neutral-800: #3f424d;
  --color-neutral-900: #292b31;

  --color-accent-100: #f5f4ff;
  --color-accent-300: #d2cefd;
  --color-accent-800: #423a6a;
  --color-accent-900: #2b2741;

  --font-heading: "Inter", system-ui, sans-serif;
  --font-heading-weight: 500;
  --font-body: "Inter", system-ui, sans-serif;

  --space-1: 3px;
  --space-2: 6px;
  --space-3: 9px;
  --space-4: 12px;
  --space-6: 18px;
  --space-8: 24px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --shadow-sm: 0 0 0 1px var(--color-neutral-800);
  --shadow-md: 0 0 0 1px var(--color-neutral-700), 0 6px 18px rgba(0,0,0,0.55);
  --shadow-lg: 0 0 0 1px var(--color-neutral-400), 0 16px 40px rgba(0,0,0,0.65);

  --content-width: 960px;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Ambient background glow — drifts slowly behind the whole page. Placed
   first in the DOM with position:fixed + no z-index, so later, unpositioned
   content simply paints over it in normal tree order. */
.ambient-glow {
  position: fixed;
  inset: -15%;
  background: radial-gradient(ellipse 55% 45% at 50% 50%, var(--color-accent-900) 0%, transparent 70%);
  opacity: 0.9;
  pointer-events: none;
  animation: driftGlow 24s ease-in-out infinite alternate;
}
@keyframes driftGlow {
  0%   { transform: translate(-10%, -8%) scale(1); }
  50%  { transform: translate(9%, 5%) scale(1.2); }
  100% { transform: translate(-6%, 9%) scale(1.05); }
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0;
}

p { margin: 0; }
a { color: var(--color-accent-300); text-decoration: none; }
a:hover { color: var(--color-accent); text-decoration: underline; }
img { display: block; max-width: 100%; }

.container { max-width: var(--content-width); margin: 0 auto; padding: 0 var(--space-6); }

.hr {
  height: 1px; border: 0; margin: var(--space-6) 0;
  background: linear-gradient(to right,
    transparent, var(--color-divider) 48px,
    var(--color-divider) calc(100% - 48px), transparent);
}

/* ============================
   BUTTONS
   ============================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  transition: background 0.2s ease, transform 0.35s var(--ease-spring);
}
.btn-primary { color: var(--color-accent); border-color: var(--color-accent); }
.btn-primary:hover { background: color-mix(in srgb, var(--color-accent) 12%, transparent); text-decoration: none; transform: translateY(-3px) scale(1.03); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); text-decoration: none; transform: translateY(-3px) scale(1.03); }
.btn:active { transform: translateY(0) scale(0.97); transition: transform 0.15s ease; }

/* ============================
   TAGS
   ============================ */
.tag {
  display: inline-flex; align-items: center; font-size: 12px;
  letter-spacing: 0.02em; padding: 5px 12px;
  border-radius: 6px;
  transition: transform 0.3s var(--ease-spring), background 0.2s ease;
}
.tag-accent { background: var(--color-accent-800); color: var(--color-accent-100); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }
.skills-row .tag:hover, .about-tags .tag:hover { transform: translateY(-3px) scale(1.08); }

/* ============================
   CARDS
   ============================ */
.card {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-4); border-radius: var(--radius-md); background: var(--color-surface);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s ease;
}
.card:hover { transform: translateY(-6px) scale(1.015); box-shadow: var(--shadow-md); }
.card-kicker { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent-300); }
.card-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 17px; line-height: 1.25; color: var(--color-text); }
.card-body { margin: 0; font-size: 13px; opacity: 0.8; flex: 1; line-height: 1.6; }
.card-meta { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--color-neutral-400); }
.card-link { font-size: 13px; font-weight: 500; color: var(--color-accent); margin-top: var(--space-1); }
.elev-sm { box-shadow: var(--shadow-sm); }

/* ============================
   NAV
   ============================ */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  backdrop-filter: blur(8px);
  background: color-mix(in oklch, var(--color-bg) 85%, transparent);
}
.nav-brand { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 18px; color: var(--color-text); margin-right: auto; }
.nav-brand:hover { color: var(--color-text); text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: var(--space-6); list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--color-neutral-300); font-size: 14px; }
.nav-links a:hover { color: var(--color-accent); text-decoration: none; }
.nav-resume { color: var(--color-accent) !important; border: 1px solid var(--color-accent); padding: 6px 14px; border-radius: var(--radius-md); }
.nav-toggle { display: none; }

/* ============================
   HERO
   ============================ */
.hero {
  max-width: var(--content-width); margin: 0 auto;
  padding: var(--space-8) var(--space-6) calc(var(--space-8) * 1.5);
  display: flex; flex-direction: column; gap: var(--space-4);
}
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes tagPulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-accent) 35%, transparent); }
  50% { box-shadow: 0 0 16px 3px color-mix(in srgb, var(--color-accent) 45%, transparent); }
}
@keyframes gradientSweep { to { background-position: 200% center; } }

.hero .tag {
  width: max-content;
  animation: fadeUp 0.7s ease-out both, tagPulse 2.6s ease-in-out 0.7s infinite;
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  background: linear-gradient(90deg,
    var(--color-text) 0%, var(--color-accent-2) 30%, var(--color-accent) 50%,
    var(--color-accent-2) 70%, var(--color-text) 100%);
  background-size: 220% auto;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: fadeUp 0.8s ease-out 0.05s both, gradientSweep 7s linear 0.9s infinite;
}
.hero-tagline { font-size: 20px; color: var(--color-neutral-300); max-width: 560px; animation: fadeUp 0.8s ease-out 0.12s both; }
.hero-actions { display: flex; gap: var(--space-3); margin-top: var(--space-2); flex-wrap: wrap; animation: fadeUp 0.8s ease-out 0.2s both; }

/* ============================
   SECTION HEADER
   ============================ */
.section { max-width: var(--content-width); margin: 0 auto; padding: var(--space-8) var(--space-6); }
.section-kicker { color: var(--color-accent-300); }
.section-title { font-size: clamp(1.6rem, 4vw, 2rem); margin: var(--space-2) 0 var(--space-6); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-item { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-item.is-visible { opacity: 1; transform: translateY(0); }

/* ============================
   ABOUT
   ============================ */
.about-grid { display: grid; grid-template-columns: 240px 1fr; gap: var(--space-6); align-items: start; }
.about-photo { width: 100%; height: 260px; object-fit: cover; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.about-text p { color: var(--color-neutral-200); line-height: 1.75; margin-bottom: var(--space-3); }
.about-text strong { color: var(--color-text); font-weight: 600; }
.about-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-4) 0 var(--space-4); }

/* ============================
   SKILLS
   ============================ */
.skills-group { margin-bottom: var(--space-4); }
.skills-label { color: var(--color-neutral-400); font-size: 13px; margin-bottom: var(--space-3); text-transform: uppercase; letter-spacing: 0.04em; }
.skills-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ============================
   PROJECTS
   ============================ */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.project-card { text-decoration: none; }
.project-icon { font-size: 28px; }

/* ============================
   EDUCATION / TIMELINE
   ============================ */
.timeline { position: relative; padding-left: var(--space-6); }
.timeline-rule {
  position: absolute; left: 5px; top: 4px; bottom: 4px; width: 1px;
  background: linear-gradient(to bottom, transparent, var(--color-neutral-700) 8%, var(--color-neutral-700) 92%, transparent);
}
.timeline-item { position: relative; margin-bottom: var(--space-4); }
.timeline-dot {
  position: absolute; left: calc(-1 * var(--space-6) + 1px); top: 22px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--color-accent); box-shadow: 0 0 0 4px var(--color-bg);
}
.timeline-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--space-2); }

/* ============================
   FOOTER
   ============================ */
.footer { padding: var(--space-8) var(--space-6) calc(var(--space-8) * 1.5); text-align: center; }
.footer-name { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 18px; color: var(--color-text); margin-bottom: var(--space-1); }
.footer-sub { font-size: 13px; color: var(--color-neutral-400); margin-bottom: var(--space-4); }
.footer-social { display: flex; justify-content: center; gap: var(--space-3); margin-bottom: var(--space-4); }
.social-link {
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--color-surface); border: 1px solid var(--color-divider);
  transition: background 0.2s ease, transform 0.2s ease;
}
.social-link:hover { background: var(--color-neutral-800); transform: translateY(-2px); }
.social-link img { width: 20px; height: 20px; object-fit: contain; border-radius: 50%; }
.footer-copy { font-size: 12px; color: var(--color-neutral-700); }

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 720px) {
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { height: 220px; }
  .projects-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-item, .hero .tag, .hero h1, .hero-tagline, .hero-actions,
  .ambient-glow, .btn, .tag, .card {
    opacity: 1 !important; transform: none !important; animation: none !important; transition: none !important;
  }
  .hero h1 {
    background: none !important; color: var(--color-text) !important; -webkit-text-fill-color: var(--color-text) !important;
  }
}