/*
  Melika Shirian Academic Homepage
  - Vanilla CSS
  - Galaxy palette with CSS variables
  - Accessible focus + reduced motion support
*/

:root {
  /* Space dawn (light) */
  --bg: #F7F9FF;
  --surface: #FFFFFF;
  --text: #0B1020;
  --muted: #4B5563;
  --primary: #5B7CFF;
  --secondary: #9B5CFF;
  --accent: #12C2E9;
  --border: rgba(11,16,32,0.12);

  --shadow: 0 20px 60px rgba(11,16,32,0.12);
  --radius: 18px;
  --radius-sm: 14px;
  --container: 1100px;

  --focus: 0 0 0 4px color-mix(in oklab, var(--accent) 55%, transparent);
  --nav-h: 68px;
  --nav-inset: 14px;

  color-scheme: light;
}

[data-theme="dark"] {
  /* Deep space (dark) */
  --bg: #050814;
  --surface: rgba(255,255,255,0.06);
  --text: #EAF0FF;
  --muted: #A7B0C0;
  --primary: #7AA2FF;
  --secondary: #B38CFF;
  --accent: #22D3EE;
  --border: rgba(234,240,255,0.14);

  --shadow: 0 24px 70px rgba(0,0,0,0.55);

  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 20% -10%, color-mix(in oklab, var(--primary) 22%, transparent), transparent 60%),
              radial-gradient(900px 500px at 85% 10%, color-mix(in oklab, var(--secondary) 18%, transparent), transparent 60%),
              radial-gradient(900px 500px at 55% 105%, color-mix(in oklab, var(--accent) 16%, transparent), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-radius: 10px;
}

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

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 1000;
  padding: 10px 12px;
  background: color-mix(in oklab, var(--surface) 92%, var(--bg));
  border: 1px solid var(--border);
  border-radius: 12px;
  transform: translateY(-130%);
  transition: transform 180ms ease;
}
.skip-link:focus { transform: translateY(0); }

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.bg__canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.bg__noise {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.06) 0 1px, transparent 2px),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,0.05) 0 1px, transparent 2px),
    radial-gradient(circle at 40% 80%, rgba(255,255,255,0.04) 0 1px, transparent 2px);
  mix-blend-mode: overlay;
  opacity: 0.35;
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--bg) 75%, transparent);
  border-bottom: 1px solid var(--border);
}

.nav {
  width: min(var(--container), calc(100% - (var(--nav-inset) * 2)));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--nav-h);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.nav__brandMark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(140deg, var(--accent), var(--secondary));
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 20%, transparent);
}

.nav__toggle {
  display: none;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 12px;
  font-weight: 650;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__links a {
  padding: 10px 10px;
  border-radius: 12px;
  color: color-mix(in oklab, var(--text) 88%, var(--muted));
}

.nav__links a:hover {
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  text-decoration: none;
}

.theme {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  color: var(--text);
  cursor: pointer;
  font-weight: 650;
}

.theme__icon {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, var(--accent), var(--secondary));
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 22%, transparent);
}

.section {
  padding: 70px 0;
}

.section__header {
  display: grid;
  gap: 6px;
  margin-bottom: 10px;
}

.section__header .muted {
  margin: 0;
}

.section__header h2 {
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 3.8vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0;
}

h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin: 0;
  letter-spacing: -0.02em;
}

h3 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.muted { color: var(--muted); }

.hero {
  padding-top: 48px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 24px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--muted);
  font-weight: 650;
}

.tagline {
  margin: 10px 0 8px;
  font-size: 1.1rem;
  color: color-mix(in oklab, var(--text) 88%, var(--muted));
}

.lead {
  margin: 12px 0 0;
  max-width: 70ch;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease, color 180ms ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--accent) 28%, var(--border));
  background: color-mix(in oklab, var(--surface) 92%, var(--accent) 6%);
}

.btn:active { transform: translateY(0); }

.btn--primary {
  border-color: color-mix(in oklab, var(--primary) 45%, var(--border));
  background: linear-gradient(140deg, color-mix(in oklab, var(--primary) 82%, var(--surface)), color-mix(in oklab, var(--secondary) 40%, var(--surface)));
}

.btn--ghost {
  background: transparent;
}

.linksRow {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: color-mix(in oklab, var(--text) 88%, var(--muted));
}

.dot { opacity: 0.7; }

.fine {
  margin-top: 16px;
  font-size: 0.92rem;
  color: var(--muted);
}

.pill {
  display: inline-block;
  margin: 4px 6px 0 0;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
}

.hero__media {
  display: grid;
  justify-items: center;
}

.avatar {
  width: min(320px, 70vw);
  aspect-ratio: 1 / 1;
  border-radius: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
}

.card {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 12px 50px rgba(0,0,0,0.06);
}

.card__title { margin-bottom: 6px; }
.card__meta { margin: 0 0 10px; color: var(--muted); }

.grid2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.bullets {
  margin: 10px 0 0;
  padding-left: 18px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  color: color-mix(in oklab, var(--text) 92%, var(--muted));
  font-weight: 650;
  font-size: 0.95rem;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.chips--interactive .chip--btn {
  cursor: pointer;
}

.chips--interactive .chip--btn:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--accent) 35%, var(--border));
}

.details {
  margin-top: 12px;
  border-top: 1px dashed var(--border);
  padding-top: 10px;
}

.details summary {
  cursor: pointer;
  font-weight: 750;
}

.details__body { margin-top: 8px; }

.pubDash {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

.pubDash__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.stat__label { color: var(--muted); font-weight: 650; font-size: 0.95rem; }
.stat__value { font-weight: 900; font-size: 1.35rem; letter-spacing: -0.02em; }

.pubDash__chart {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.barRow {
  display: grid;
  grid-template-columns: 100px 1fr 40px;
  gap: 10px;
  align-items: center;
  margin: 8px 0;
}

.barLabel { color: var(--muted); font-weight: 650; font-size: 0.95rem; }
.barTrack {
  height: 10px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--surface) 78%, transparent);
  border: 1px solid var(--border);
  overflow: hidden;
}

.barFill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), color-mix(in oklab, var(--secondary) 50%, var(--primary)));
  transition: width 260ms ease;
}

.barFill--secondary { background: linear-gradient(90deg, var(--secondary), color-mix(in oklab, var(--primary) 40%, var(--secondary))); }
.barFill--accent { background: linear-gradient(90deg, var(--accent), color-mix(in oklab, var(--primary) 25%, var(--accent))); }

.barValue { font-weight: 850; }

.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0 18px;
}

.filter {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  border-radius: 999px;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 750;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.filter:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--accent) 30%, var(--border));
}

.filter:active { transform: translateY(0); }

.filter.is-active {
  border-color: color-mix(in oklab, var(--accent) 40%, var(--border));
  background: linear-gradient(140deg, color-mix(in oklab, var(--accent) 26%, var(--surface)), color-mix(in oklab, var(--secondary) 14%, var(--surface)));
}

.timeline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.yearPill {
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  font-weight: 750;
}

.pubList {
  display: grid;
  gap: 12px;
}

.pub {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  border-radius: var(--radius);
  padding: 16px;
}

.pub__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-weight: 800;
  font-size: 0.9rem;
}

.badge--published { border-color: color-mix(in oklab, var(--primary) 45%, var(--border)); }
.badge--under-review { border-color: color-mix(in oklab, var(--secondary) 45%, var(--border)); }
.badge--preprint { border-color: color-mix(in oklab, var(--accent) 45%, var(--border)); }

.pub__title { margin: 0; font-weight: 900; letter-spacing: -0.02em; }
.pub__meta { margin: 8px 0 0; color: var(--muted); }

.pub__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.pub__links a, .pub__links button {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 10px;
  font-weight: 750;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.pub__links a:hover, .pub__links button:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--accent) 28%, var(--border));
  text-decoration: none;
}

.pub__links a:active, .pub__links button:active { transform: translateY(0); }

.pub__links a.is-placeholder {
  opacity: 0.65;
}

.bib {
  margin-top: 10px;
  padding: 12px;
  border-radius: 14px;
  border: 1px dashed var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  color: color-mix(in oklab, var(--text) 88%, var(--muted));
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.92rem;
  overflow-x: auto;
}

.linkGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.iconLink {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  font-weight: 750;
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.iconLink--soft {
  background: color-mix(in oklab, var(--surface) 86%, transparent);
}

.iconLink__icon {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
}

.iconLink:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--accent) 28%, var(--border));
  background: color-mix(in oklab, var(--surface) 90%, var(--accent) 6%);
  text-decoration: none;
}

.iconLink:active { transform: translateY(0); }

.iconLink.is-placeholder {
  opacity: 0.6;
  pointer-events: none;
}

.form .field { margin-top: 12px; }

label { display: block; font-weight: 750; margin-bottom: 6px; }

input, textarea {
  width: 100%;
  border-radius: 14px;
  padding: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  color: var(--text);
}

textarea { resize: vertical; min-height: 130px; }

.error {
  margin: 6px 0 0;
  color: color-mix(in oklab, #ff3b7a 70%, var(--text));
  min-height: 1.3em;
  font-weight: 650;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  background: color-mix(in oklab, var(--bg) 85%, transparent);
}

.footer__grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer__links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms ease, transform 520ms ease;
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover, .chips--interactive .chip--btn:hover { transform: none; }
  .barFill { transition: none; }
}

/* Responsive */
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__media { order: -1; justify-items: start; }
  .pubDash { grid-template-columns: 1fr; }
  .pubDash__stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .grid2 { grid-template-columns: 1fr; }

  .nav__toggle { display: inline-flex; }

  .nav__links {
    position: absolute;
    top: calc(var(--nav-h) - 4px);
    left: 0;
    right: 0;
    padding: 12px;
    margin: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: color-mix(in oklab, var(--bg) 92%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
  }

  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 12px; }
  .theme { justify-content: center; }

  .linkGrid { grid-template-columns: 1fr; }
}