:root {
    --bg: #f7f8fc;
    --surface: #ffffff;
    --text: #1f2933;
    --muted: #52606d;
    --accent: #2563eb;
    --accent-dark: #1d4ed8;
    --border: #d9e2ec;
    --shadow: 0 15px 35px rgba(37, 99, 235, 0.08);
    --radius: 18px;
    --transition: 180ms ease;
}

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

body {
    margin: 0;
    font-family: "Segoe UI", "Inter", "Helvetica Neue", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-dark);
}

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 1rem;
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    transition: top var(--transition);
    z-index: 100;
}

.skip-link:focus {
    top: 1rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.site-header {
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 0;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.brand-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.brand-tagline {
    font-size: 0.9rem;
    color: var(--muted);
    letter-spacing: 0.02em;
}

.site-nav {
    display: flex;
    gap: 1.5rem;
    font-weight: 600;
}

.site-nav a {
    color: var(--muted);
    position: relative;
    padding-bottom: 0.2rem;
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.site-nav a:hover {
    color: var(--accent);
}

.site-nav a:hover::after {
    transform: scaleX(1);
}

main {
    padding: 3.5rem 0 4.5rem;
}

.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: grid;
    gap: 1.4rem;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: 700;
    color: var(--accent);
    margin: 0;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.3rem, 5vw, 3.1rem);
    line-height: 1.15;
}

.lead {
    margin: 0;
    color: var(--muted);
    font-size: 1.05rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.85rem 1.8rem;
    border-radius: 999px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.button.primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 15px 30px rgba(37, 99, 235, 0.25);
}

.button.primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 18px 35px rgba(37, 99, 235, 0.35);
}

.button.ghost {
    border-color: var(--accent);
    color: var(--accent);
}

.button.ghost:hover {
    background: rgba(37, 99, 235, 0.08);
    transform: translateY(-2px);
}

.search-bar {
    margin-top: 2rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.search-bar input[type="search"] {
    flex: 1;
    min-width: 220px;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
}

.search-bar button {
    border-radius: 999px;
}

.highlight-grid,
.about-grid,
.project-grid,
.contact-panel {
    margin-top: 3rem;
    display: grid;
    gap: 1.5rem;
}

.ai-widget {
    margin-top: 3rem;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(15, 23, 42, 0.08);
    display: grid;
    gap: 1.5rem;
}

.ai-widget-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ai-interests {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.ai-interests button {
    border: 1px solid rgba(37, 99, 235, 0.4);
    border-radius: 999px;
    padding: 0.5rem 1.2rem;
    background: transparent;
    color: var(--accent);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
}

.ai-interests button.active {
    background: var(--accent);
    color: #fff;
}

.ai-result {
    background: rgba(15, 23, 42, 0.04);
    border-radius: 16px;
    padding: 1.5rem;
}

.ai-result h3 {
    margin-top: 0;
}

.ai-result .reason {
    color: var(--muted);
    font-size: 0.95rem;
}

.ai-qa-form {
    display: grid;
    gap: 0.6rem;
}

.qa-input-row {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.qa-input-row input {
    flex: 1;
    min-width: 220px;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    font-size: 1rem;
}

.ai-answer {
    background: rgba(37, 99, 235, 0.08);
    border-radius: 12px;
    padding: 1.25rem;
    font-size: 0.95rem;
}

.highlight-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.highlight-card,
.info-card,
.project-card,
.contact-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.8rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(37, 99, 235, 0.08);
    transition: transform var(--transition), box-shadow var(--transition);
}

.highlight-card:hover,
.info-card:hover,
.project-card:hover,
.contact-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.12);
}

.highlight-card h2,
.info-card h2,
.project-card h2,
.contact-card h2,
.page-header h1 {
    margin-top: 0;
    color: var(--text);
}

.page-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
    display: grid;
    gap: 1rem;
}

.about-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.tag-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tag-list li {
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent-dark);
    font-weight: 600;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.12);
    color: var(--accent-dark);
    font-weight: 600;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.tag-pill.active {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px);
}

.tag-filter {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.project-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.project-card img {
    width: 100%;
    border-radius: calc(var(--radius) - 6px);
    margin-bottom: 1rem;
    object-fit: cover;
    box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.05);
}

.project-card {
    transition: opacity var(--transition);
}

.project-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--muted);
    font-style: italic;
}

.project-detail {
    display: grid;
    gap: 2rem;
}

.project-hero img {
    width: 100%;
    border-radius: var(--radius);
}

.home-featured .project-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.contact-panel {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.contact-card a {
    font-weight: 600;
    word-break: break-word;
}

.contact-form-wrapper {
    margin-top: 2.5rem;
}

.contact-form {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(15, 23, 42, 0.06);
    display: grid;
    gap: 1rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-field label {
    font-weight: 600;
    color: var(--text);
}

.form-field input,
.form-field textarea {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    font-family: inherit;
}

.field-error {
    color: #dc2626;
    font-size: 0.9rem;
    margin: 0;
}

.hp-field {
    position: absolute;
    left: -9999px;
    opacity: 0;
}

.alert {
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-top: 1rem;
}

.alert.success {
    background: rgba(34, 197, 94, 0.15);
    color: #065f46;
    border: 1px solid rgba(16, 185, 129, 0.6);
}

.site-footer {
    background: #0b172a;
    color: rgba(255, 255, 255, 0.78);
    padding: 2rem 0;
}

.footer-inner {
    text-align: center;
}

@media (max-width: 720px) {
    .site-nav {
        gap: 1rem;
        font-size: 0.95rem;
    }

    .hero {
        padding: 3rem 1.5rem;
    }
}
/* === Neo Theme Layer (drop-in) === */
:root {
  --bg: #070b14;                /* dark space */
  --surface: rgba(13, 18, 31, 0.65);
  --text: #e6f0ff;
  --muted: #9ab0c7;
  --accent: #60a5fa;            /* neon blue */
  --accent-dark: #3b82f6;
  --accent-2: #22d3ee;          /* cyan */
  --accent-3: #c084fc;          /* purple */
  --border: rgba(96,165,250,.25);
  --shadow: 0 18px 50px rgba(0, 148, 255, 0.18);
  --radius: 20px;
  --ring: 0 0 0 1px rgba(96,165,250,.25), 0 0 0 6px rgba(96,165,250,.08);
}

/* Animated star grid background */
body {
  background:
    radial-gradient(1200px 600px at 80% -20%,
      rgba(33, 150, 243, 0.25), transparent 60%),
    radial-gradient(900px 500px at -10% 120%,
      rgba(168, 85, 247, 0.18), transparent 60%),
    /* subtle grid */
    linear-gradient(transparent 98%, rgba(96,165,250,.07) 100%) 0 0/ 100% 34px,
    linear-gradient(90deg, transparent 98%, rgba(96,165,250,.07) 100%) 0 0/ 34px 100%,
    #070b14;
  animation: bgFloat 22s linear infinite;
}
@keyframes bgFloat {
  0%   { background-position:
          0 0, 0 0,
          0 0, 0 0, 0 0; }
  100% { background-position:
          0 0, 0 0,
          0 34px, 34px 0, 0 0; }
}

/* Frosted header with neon underline on hover */
.site-header {
  background: rgba(10, 14, 24, 0.56);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.site-nav a {
  color: #cfe1ff;
  letter-spacing: .02em;
}
.site-nav a::after {
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  filter: drop-shadow(0 0 6px rgba(96,165,250,.7));
}

/* Hero: glass card + gradient title */
.hero {
  background: linear-gradient(180deg, rgba(10,15,26,.65), rgba(9,12,22,.5));
  border: 1px solid var(--border);
  backdrop-filter: blur(14px) saturate(115%);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* soft moving sheen */
  content: "";
  position: absolute; inset: -40%;
  background: conic-gradient(from 0deg,
    rgba(96,165,250,.12), transparent, rgba(34,211,238,.12), transparent,
    rgba(192,132,252,.12), transparent);
  filter: blur(42px);
  animation: spin 18s linear infinite;
  pointer-events: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.eyebrow { color: var(--accent-2); opacity: .95; }
.hero h1 {
  background: linear-gradient(90deg, #e9f2ff, #bcd8ff 40%, #c084fc 70%, #22d3ee 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  text-shadow: 0 0 18px rgba(96,165,250,.15);
}

/* Cards: glass + neon edge */
.highlight-card,
.info-card,
.project-card,
.contact-card {
  background: linear-gradient(180deg, rgba(12,16,27,.7), rgba(8,12,22,.55));
  border: 1px solid var(--border);
  backdrop-filter: blur(10px) saturate(120%);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  position: relative;
}
.highlight-card::after,
.info-card::after,
.project-card::after,
.contact-card::after {
  /* holographic edge */
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(96,165,250,.5), rgba(34,211,238,.25), rgba(192,132,252,.35));
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}

/* Buttons: pill hologram + soft lift */
.button {
  letter-spacing: .02em;
  box-shadow: 0 10px 24px rgba(0, 148, 255, .22);
  transform: translateZ(0); /* enable GPU */
}
.button.primary {
  background: linear-gradient(90deg, var(--accent-dark), var(--accent-2) 60%, var(--accent-3));
  border: 1px solid rgba(96,165,250,.4);
  text-shadow: 0 1px 0 rgba(0,0,0,.15);
}
.button.primary:hover { box-shadow: 0 16px 32px rgba(0, 148, 255, .33); }
.button.ghost {
  border-color: rgba(96,165,250,.45);
  background: linear-gradient(180deg, rgba(96,165,250,.12), rgba(96,165,250,.05));
}
.button.ghost:hover {
  box-shadow: 0 16px 32px rgba(96,165,250,.22);
}

/* Micro-interactions */
.highlight-card:hover,
.info-card:hover,
.project-card:hover,
.contact-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 56px rgba(0, 148, 255, .18);
}

/* Tags: glowing chips */
.tag-list li {
  background: linear-gradient(180deg, rgba(34,211,238,.16), rgba(96,165,250,.12));
  color: #dff7ff;
  border: 1px solid rgba(96,165,250,.35);
  text-shadow: 0 1px 0 rgba(0,0,0,.35);
}

/* Footer: starfield fade */
.site-footer {
  background: radial-gradient(800px 300px at 50% -10%, rgba(37,99,235,.25), transparent 70%),
              #050914;
  border-top: 1px solid rgba(96,165,250,.18);
}
/* ===============================
   NEO-AURORA UPGRADE (drop-in)
   =============================== */

/* 1) dual theme tokens (dark default) */
:root,
:root[data-theme="dark"] {
  --bg: #05080f;
  --surface: rgba(12,16,27,.62);
  --text: #eaf2ff;
  --muted: #9fb2c9;
  --accent: #7cc9ff;      /* ice blue */
  --accent-dark: #3b82f6;
  --accent-2: #22d3ee;    /* cyan */
  --accent-3: #c084fc;    /* purple */
  --border: rgba(124,201,255,.24);
  --shadow: 0 18px 50px rgba(0, 160, 255, 0.18);
  --ring: 0 0 0 1px rgba(124,201,255,.22), 0 0 0 6px rgba(124,201,255,.08);
  --radius: 20px;
  --noise: url("data:image/svg+xml;utf8,\
<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60'>\
<filter id='n'><feTurbulence baseFrequency='0.75' numOctaves='2' /></filter>\
<rect width='100%' height='100%' filter='url(%23n)' opacity='0.06'/>\
</svg>");
}
:root[data-theme="light"] {
  --bg: #f6faff;
  --surface: rgba(255,255,255,.82);
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-2: #0891b2;
  --accent-3: #7c3aed;
  --border: rgba(37,99,235,.22);
  --shadow: 0 20px 55px rgba(37, 99, 235, 0.18);
  --ring: 0 0 0 1px rgba(37,99,235,.22), 0 0 0 6px rgba(37,99,235,.08);
}

/* 2) animated aurora + soft grid + film grain */
body {
  background:
   radial-gradient(1200px 600px at 85% -20%, rgba(124,201,255,.24), transparent 60%),
   radial-gradient(900px 520px at -10% 120%, rgba(192,132,252,.20), transparent 60%),
   /* floating aurora ribbons */
   conic-gradient(from 180deg at 60% 20%, rgba(34,211,238,.12), transparent 25%, rgba(124,201,255,.14), transparent 50%, rgba(192,132,252,.12), transparent 75%, rgba(34,211,238,.12)) 0 0/140% 140%,
   /* subtle grid */
   linear-gradient(transparent 97%, rgba(124,201,255,.07) 100%) 0 0/100% 34px,
   linear-gradient(90deg, transparent 97%, rgba(124,201,255,.07) 100%) 0 0/34px 100%,
   var(--bg);
  animation: auroraShift 28s linear infinite;
  position: relative;
  isolation: isolate;
}
body::after {
  /* film grain */
  content: "";
  position: fixed; inset: 0; pointer-events: none;
  background-image: var(--noise);
  mix-blend-mode: overlay;
  opacity: .7;
}
@keyframes auroraShift {
  0%   { background-position: 0 0, 0 0, 0 0, 0 0, 0 0, 0 0; }
  100% { background-position: 0 0, 0 0, 120% 80%, 0 34px, 34px 0, 0 0; }
}

/* respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  body { animation: none; }
  .hero::before, .shine, .scanline { display: none !important; }
}

/* 3) header: glass + neon active underline */
.site-header {
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.site-nav a {
  color: color-mix(in oklab, var(--text), #90caf9 45%);
  letter-spacing: .02em;
}
.site-nav a[aria-current="page"]::after,
.site-nav a:hover::after {
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  filter: drop-shadow(0 0 6px color-mix(in oklab, var(--accent), white 20%));
}

/* 4) hero: layered glow + “scanline” */
.hero {
  background: linear-gradient(180deg, color-mix(in oklab, var(--surface) 75%, transparent),
                                     color-mix(in oklab, var(--surface) 55%, transparent));
  border: 1px solid var(--border);
  backdrop-filter: blur(14px) saturate(118%);
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute; inset: -40%;
  background: conic-gradient(from 0deg,
    rgba(124,201,255,.14), transparent, rgba(34,211,238,.12), transparent,
    rgba(192,132,252,.14), transparent);
  filter: blur(42px);
  animation: spin 22s linear infinite;
  pointer-events: none;
}
.hero::after {
  /* ultra subtle scanline sweep */
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 0 45%, rgba(255,255,255,.06) 50%, transparent 55% ) 0 0/100% 14px;
  opacity: .25;
  animation: scan 6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes scan { to { background-position-y: 14px; } }

.eyebrow { color: var(--accent-2); opacity: .95; }
.hero h1 {
  background: linear-gradient(90deg, #ffffff, #cfe7ff 40%, var(--accent-3) 70%, var(--accent-2) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 18px color-mix(in oklab, var(--accent), white 30%);
}

/* 5) cards: holographic edge + depth */
.highlight-card,
.info-card,
.project-card,
.contact-card {
  background: linear-gradient(180deg, color-mix(in oklab, var(--surface) 82%, transparent),
                                     color-mix(in oklab, var(--surface) 60%, transparent));
  border: 1px solid var(--border);
  backdrop-filter: blur(10px) saturate(120%);
  box-shadow: 0 10px 28px rgba(0,0,0,.35);
  position: relative;
  transform-style: preserve-3d;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.highlight-card:hover,
.info-card:hover,
.project-card:hover,
.contact-card:hover {
  transform: translateY(-8px) perspective(800px) rotateX(2deg);
  box-shadow: 0 24px 56px rgba(0, 160, 255, .18);
  border-color: color-mix(in oklab, var(--border), var(--accent) 35%);
}
.project-card::after,
.highlight-card::after,
.info-card::after,
.contact-card::after {
  /* iridescent outline using mask hack */
  content: "";
  position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(135deg, rgba(124,201,255,.60), rgba(34,211,238,.30), rgba(192,132,252,.45));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}

/* 6) project grid: reveal panel on hover (pure CSS) */
.project-card {
  overflow: hidden;
}
.project-card .reveal {
  max-height: 0;
  opacity: 0;
  transition: max-height .35s ease, opacity .35s ease;
}
.project-card:hover .reveal {
  max-height: 200px;
  opacity: 1;
}

/* 7) buttons: hologram pill + animated shine */
.button {
  letter-spacing: .02em;
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
}
.button.primary {
  background: linear-gradient(90deg, var(--accent-dark), var(--accent-2) 60%, var(--accent-3));
  border: 1px solid color-mix(in oklab, var(--accent), #fff 10%);
  box-shadow: 0 12px 28px rgba(0, 148, 255, .22);
}
.button.primary:hover { box-shadow: 0 18px 38px rgba(0, 148, 255, .33); }
.button.primary::after {
  /* shine sweep */
  content: "";
  position: absolute; inset: -120% -40% auto -40%;
  height: 260%; transform: rotate(25deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent);
  animation: sweep 2.4s ease-in-out infinite;
}
@keyframes sweep { 0% { left: -140%; } 60%,100% { left: 120%; } }

.button.ghost {
  border-color: color-mix(in oklab, var(--accent), #fff 15%);
  background: linear-gradient(180deg, color-mix(in oklab, var(--accent) 16%, transparent),
                                     color-mix(in oklab, var(--accent) 6%, transparent));
}

/* 8) tags: glass chips with neon dot */
.tag-list li {
  position: relative;
  padding-left: 1.3rem;
  background: linear-gradient(180deg, color-mix(in oklab, var(--accent-2) 18%, transparent),
                                     color-mix(in oklab, var(--accent) 12%, transparent));
  border: 1px solid color-mix(in oklab, var(--accent), #fff 25%);
  color: color-mix(in oklab, var(--text), #e0f2ff 15%);
}
.tag-list li::before {
  content: "";
  position: absolute; left: .55rem; top: 50%; translate: 0 -50%;
  width: 6px; height: 6px; border-radius: 999px;
  background: radial-gradient(circle at 50% 50%, #fff, var(--accent));
  box-shadow: 0 0 12px color-mix(in oklab, var(--accent), #fff 15%);
}

/* 9) footer: aurora edge */
.site-footer {
  background:
    radial-gradient(800px 300px at 50% -10%, color-mix(in oklab, var(--accent), transparent 60%), transparent 70%),
    color-mix(in oklab, var(--bg), #000 10%);
  border-top: 1px solid var(--border);
}

/* 10) utility: perspective hover for any grid */
.perspective-grid > *:hover {
  transform: translateY(-8px) perspective(900px) rotateX(2.5deg);
}

/* 11) optional: smooth anchors globally */
html { scroll-behavior: smooth; }
.tag-filter-label {
    font-weight: 600;
    color: var(--muted);
}