:root {
  --bg: #0b1220;
  --surface: #0e1628;
  --surface-2: #111a30;
  --text: #e6eefc;
  --muted: #98a6c5;
  --border: #1b2742;

  --primary: #22d3ee;
  --primary-contrast: #07111e;
  --accent: #a78bfa;

  --glow: 0 0 24px color-mix(in oklab, var(--primary) 55%, transparent);

  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --maxw: 1120px;

  /* Responsive gutter (safe-area aware) */
  --gutter: clamp(16px, 5vw, 24px);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f8fafc;
  --surface-2: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --primary: #0ea5e9;
  --primary-contrast: #ffffff;
  --accent: #7c3aed;
  --glow: 0 0 8px color-mix(in oklab, var(--primary) 40%, transparent);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 15% -10%, #0f1b35 0%, transparent 60%), var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* --------------------------------------------------
   Parallax starfield (dark theme only)
   Pure CSS + small JS helper to generate star layers.
   We keep tiny (1–3px) elements with huge box-shadow lists.
   This avoids massive DOM nodes & preserves performance.
--------------------------------------------------- */
html[data-theme="dark"] body {
  background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
  overflow-x: hidden;
}
html[data-theme="light"] #stars,
html[data-theme="light"] #stars2,
html[data-theme="light"] #stars3 { opacity: 0 !important; }

#stars, #stars2, #stars3 {
  position: fixed;
  top: 0; left: 0;
  width: 1px; height: 1px;
  display: block;
  pointer-events: none;
  z-index: -1; /* behind all content */
  background: transparent;
  opacity: 1;
  transition: opacity .35s ease;
}
#stars2 { width: 2px; height: 2px; }
#stars3 { width: 3px; height: 3px; }

/* Animations (different speeds for depth) */
#stars { animation: animStar 50s linear infinite; }
#stars2 { animation: animStar 100s linear infinite; }
#stars3 { animation: animStar 150s linear infinite; }

/* Clone second set 2000px below for seamless upward scroll */
#stars:after, #stars2:after, #stars3:after {
  content: "";
  position: absolute;
  top: 2000px;
  width: inherit; height: inherit;
  box-shadow: inherit;
}

/* Fallback minimal stars (will be replaced by JS) */
#stars { box-shadow: 10px 20px #fff, 50px 300px #fff, 120px 800px #fff; }
#stars2 { box-shadow: 30px 400px #fff, 200px 1200px #fff; }
#stars3 { box-shadow: 80px 1600px #fff, 400px 1900px #fff; }

@keyframes animStar {
  from { transform: translateY(0); }
  to { transform: translateY(-2000px); }
}

img { max-width: 100%; display: block; object-fit: cover; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
p { margin: 0 0 1rem; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .75rem; font-family: "Oxanium", "Space Grotesk", ui-sans-serif; }
h1 { font-size: clamp(2rem, 6vw, 3.25rem); letter-spacing: 0.2px; }
h2 { font-size: clamp(1.45rem, 4.5vw, 2.1rem); }
h3 { font-size: clamp(1.05rem, 3.5vw, 1.3rem); }

.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-left: calc(var(--gutter) + env(safe-area-inset-left));
  padding-right: calc(var(--gutter) + env(safe-area-inset-right));
}
.section { padding-block: clamp(2.5rem, 6vw, 4rem); }
.section-intro { color: var(--muted); margin-bottom: 1.5rem; }
.small { font-size: .9rem; color: var(--muted); }
.muted { color: var(--muted); }
:where(input, textarea, button, a) { -webkit-tap-highlight-color: transparent; }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; left: 1rem; top: 1rem; z-index: 1000; width: auto; height: auto; padding: .5rem .75rem;
  background: var(--surface); color: var(--text); border-radius: 6px; outline: 2px solid var(--primary);
}

/* Header (full-bleed, elevated, auto-hide support) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding-block: .75rem;
  /* Full-width glassy background */
  background: color-mix(in oklab, var(--bg) 88%, black 12%);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--border);
  /* Shadow to look above content */
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
  /* Slide away on scroll down */
  transform: translateY(0);
  transition: transform .28s ease-in-out, box-shadow .2s ease;
}
/* Let header stretch to the edges; keep safe gutters for content */
.site-header.container {
  max-width: none;
  margin-inline: 0;
  padding-left: calc(var(--gutter) + env(safe-area-inset-left));
  padding-right: calc(var(--gutter) + env(safe-area-inset-right));
}
.site-header.hide { transform: translateY(-100%); }

.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--text); font-weight: 700; letter-spacing: .3px; }
.brand img { width: 30px; height: 30px; border-radius: 8px; box-shadow: var(--glow); }
.brand-text { letter-spacing: .3px; }

.nav-menu { display: flex; align-items: center; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.nav-menu a { color: var(--text); padding: .45rem .6rem; border-radius: 8px; }
.nav-menu a:hover { background: var(--surface-2); text-decoration: none; box-shadow: var(--glow); }
.nav-toggle { display: none; background: none; border: 0; padding: .25rem; cursor: pointer; }
.nav-toggle-bar { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; }

.theme-toggle { border: 1px solid var(--border); background: var(--surface-2); color: var(--text); padding: .4rem .5rem; border-radius: 10px; cursor: pointer; box-shadow: var(--glow); }
/* Ensure the icon inherits the button color (light in dark mode, dark in light mode) */
.theme-toggle svg { display: block; color: inherit; }
.theme-toggle svg path { fill: currentColor !important; }

/* Hero */
.hero {
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 2rem; align-items: center;
  padding: 3rem 0 2rem;
}
.hero .eyebrow { color: var(--muted); text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; }
.hero .tagline { color: color-mix(in oklab, var(--text) 85%, var(--accent) 15%); margin-bottom: .5rem; }
.hero .summary { color: var(--text); }
.hero .cta { display: flex; gap: .75rem; margin-top: 1rem; flex-wrap: wrap; }
.hero .socials { list-style: none; display: flex; gap: .75rem; padding: 0; margin: 1rem 0 0; }
.hero .socials a { display: inline-flex; border: 1px solid var(--border); padding: .45rem; border-radius: 10px; background: var(--surface-2); }
.hero .socials a:hover { background: color-mix(in oklab, var(--surface-2) 75%, var(--accent) 25%); box-shadow: var(--glow); }
.hero-media { display: flex; justify-content: center; }
.avatar { width: min(220px, 60vw); height: auto; aspect-ratio: 1/1; border-radius: 24px; border: 1px solid var(--border); box-shadow: var(--shadow), var(--glow); background: var(--surface-2); padding: 10px; object-fit: cover; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .7rem 1rem; border-radius: 999px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { transform: translateY(-1px); text-decoration: none; box-shadow: var(--glow); }
.btn.primary { background: linear-gradient(135deg, color-mix(in oklab, var(--primary) 85%, #ffffff 15%), color-mix(in oklab, var(--accent) 60%, #000 40%)); color: var(--primary-contrast); border-color: color-mix(in oklab, var(--primary) 60%, black 40%); }

/* Projects */
.projects-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.project-card {
  grid-column: span 6;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column; min-height: 100%;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.project-card:hover { transform: translateY(-3px); box-shadow: var(--shadow), var(--glow); border-color: color-mix(in oklab, var(--accent) 60%, var(--border)); }
/* Smaller, capped media height */
.project-media {
  height: clamp(120px, 22vw, 180px);
  background: #0b1220;
  display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}
.project-media img { width: 100%; height: 100%; object-fit: cover; }
.project-body { padding: 1rem; display: grid; gap: .5rem; }
.project-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .25rem; }
.tag { font-size: .8rem; color: var(--muted); border: 1px solid var(--border); padding: .15rem .5rem; border-radius: 999px; background: var(--surface-2); }
.project-links { display: flex; gap: .5rem; margin-top: auto; padding: 0 1rem 1rem; }
.project-links a { padding: .5rem .7rem; border: 1px solid var(--border); border-radius: 10px; background: color-mix(in oklab, var(--surface-2) 80%, black 20%); }

/* About */
.about-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.highlights, .facts { margin: .5rem 0 0; padding-left: 1.2rem; }

/* Skills */
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; }
.chips li { border: 1px solid var(--border); padding: .45rem .75rem; border-radius: 999px; background: var(--surface-2); color: var(--text); }

/* Experience */
.timeline { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.timeline-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }

/* Contact */
.contact-actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: .75rem; }
.contact-form { margin-top: 1rem; display: grid; gap: .75rem; max-width: 600px; }
.contact-form label { display: grid; gap: .35rem; color: var(--muted); }
.contact-form input, .contact-form textarea {
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  border-radius: 10px; padding: .75rem .85rem; width: 100%;
}
.contact-form input[aria-invalid="true"], .contact-form textarea[aria-invalid="true"] {
  outline: 2px solid #ef4444; border-color: #ef4444;
}
.contact-form button { align-self: start; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; text-align: center; }

/* Reveal animation */
.reveal { opacity: 0; translate: 0 12px; transition: opacity .6s ease, translate .6s ease; }
.reveal.visible { opacity: 1; translate: 0 0; }

/* Responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero .cta, .hero .socials { justify-content: center; }
  .projects-grid .project-card { grid-column: span 12; }
  .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .nav-menu {
    position: absolute;
    right: calc(var(--gutter) + env(safe-area-inset-right));
    top: 64px;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: .5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    gap: .25rem;
    max-width: calc(100vw - (2 * var(--gutter)));
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { display: block; padding: .6rem .8rem; }
}