/* =========================================================================
   modern-ui.css  —  Loaded LAST. Centered-immersive hero + modernized UI.

   Two jobs:
     1) Re-stage the hero as a centered, immersive composition: a full-bleed
        ambient 3D backdrop (#hero-3d.hero-3d--bg) with the identity in a
        frosted-glass panel floating over it.
     2) A light, site-wide modernization pass (glass section headers, refined
        section titles, smoother section dividers) that harmonizes with the new
        per-section 3D accents (section-three.css).

   Everything keys off the existing CSS custom properties so light/dark themes
   and the live accent system keep working.
   ========================================================================= */

/* =========================================================================
   1. HERO — centered immersive
   ========================================================================= */

.hero--immersive {
  text-align: center;
}

/* ---- Full-bleed ambient 3D backdrop ----
   Overrides the right-side centerpiece sizing from three-scene.css so the
   Three.js layer fills the whole hero behind the content. The #id selector is
   needed to beat three-scene.css's `#hero-3d` (specificity 100). */
#hero-3d.hero-3d--bg {
  position: absolute;
  inset: 0;
  width: 100%;
  max-width: none;
  min-height: 0;
  margin: 0;
  aspect-ratio: auto;
  display: block;
  z-index: 0;
  pointer-events: none;
}

/* The backdrop glow is brightest in the centre, falling off to the edges so
   text stays legible and the panel reads as floating in front of it. */
.hero-3d--bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 48%,
    transparent 30%,
    color-mix(in srgb, var(--bg-primary) 55%, transparent) 72%,
    var(--bg-primary) 100%);
  pointer-events: none;
  z-index: 2;
}

/* Larger, centred fallback orb for the full-bleed slot (mobile / no-WebGL). */
.hero-3d--bg .hero-3d-fallback {
  inset: 22% 30%;
  filter: blur(46px);
  opacity: 0.55;
}
@media (max-width: 768px) {
  .hero-3d--bg .hero-3d-fallback { inset: 18% 18%; filter: blur(38px); }
}

/* ---- Centered content column ---- */
.hero-content.hero-content--center {
  display: flex;
  align-items: center;
  justify-content: center;
  grid-template-columns: none;   /* cancel the old 2-col grid */
  position: relative;
  z-index: 2;
  width: 100%;
}

/* ---- Frosted glass identity panel ---- */
.hero-panel {
  position: relative;
  width: min(94vw, 780px);
  text-align: center;
  padding: clamp(1.75rem, 4vw, 3.25rem) clamp(1.5rem, 4vw, 3.25rem);
  border-radius: 30px;
  background: color-mix(in srgb, var(--bg-primary) 62%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary-color) 22%, var(--border-color));
  -webkit-backdrop-filter: blur(20px) saturate(150%);
          backdrop-filter: blur(20px) saturate(150%);
  box-shadow:
    0 40px 90px -30px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    0 1px 0 rgba(255, 255, 255, 0.08) inset;
  overflow: hidden;
}
[data-theme="dark"] .hero-panel {
  background: color-mix(in srgb, var(--bg-primary) 58%, transparent);
  box-shadow:
    0 50px 110px -35px rgba(0, 0, 0, 0.75),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset,
    0 1px 0 rgba(255, 255, 255, 0.07) inset;
}

/* Animated accent hairline sweeping along the panel's top edge. */
.hero-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--primary-color),
    var(--secondary-color),
    var(--accent-color),
    transparent);
  background-size: 200% 100%;
  animation: heroPanelSweep 6s linear infinite;
  opacity: 0.9;
}
@keyframes heroPanelSweep {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-panel::before { animation: none; }
}

/* ---- Availability status pill ---- */
.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1.4rem;
  padding: 0.4rem 0.95rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-secondary, var(--text-primary));
  background: color-mix(in srgb, var(--accent-color) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-color) 35%, transparent);
  border-radius: 999px;
}
.hero-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
  animation: heroStatusPulse 2s ease-out infinite;
}
@keyframes heroStatusPulse {
  0%   { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); }
  70%  { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-status-dot { animation: none; }
}

/* ---- Centre the existing hero internals inside the panel ---- */
.hero--immersive .hero-title { margin-bottom: 1rem; }
.hero--immersive .hero-title .gradient-text {
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.02;
}
.hero--immersive .name-first,
.hero--immersive .name-last { display: inline-block; }

.hero--immersive .hero-research-tag {
  margin: 0 auto 1rem;
}

.hero--immersive .hero-subtitle {
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  margin: 0 auto 1rem;
}

.hero--immersive .hero-description {
  max-width: 56ch;
  margin: 0 auto 2rem;
}

/* ---- Stats as glass cards, centered ---- */
.hero--immersive .hero-stats {
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.hero--immersive .hero-stats .stat {
  min-width: 104px;
  padding: 0.85rem 1.1rem;
  border-radius: 16px;
  background: color-mix(in srgb, var(--bg-secondary) 55%, transparent);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast, 0.2s ease),
              border-color var(--transition-fast, 0.2s ease),
              box-shadow var(--transition-fast, 0.2s ease);
}
.hero--immersive .hero-stats .stat:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--primary-color) 50%, transparent);
  box-shadow: 0 12px 30px -12px color-mix(in srgb, var(--primary-color) 60%, transparent);
}
.hero--immersive .hero-stats .stat-number {
  font-size: 1.9rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---- Buttons centered; icon-only social chips ---- */
.hero--immersive .hero-buttons.hero-buttons-research {
  justify-content: center;
  align-items: center;
}
.btn.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: 50%;
  font-size: 1.1rem;
  color: var(--text-primary);
  background: color-mix(in srgb, var(--bg-secondary) 60%, transparent);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast, 0.2s ease),
              color var(--transition-fast, 0.2s ease),
              border-color var(--transition-fast, 0.2s ease),
              box-shadow var(--transition-fast, 0.2s ease);
}
.btn.btn-icon:hover {
  transform: translateY(-3px);
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  box-shadow: 0 12px 26px -10px color-mix(in srgb, var(--primary-color) 70%, transparent);
}

/* =========================================================================
   2. SITE-WIDE MODERN POLISH
   ========================================================================= */

/* Section titles: tighter, gradient underline accent. */
.section-header { position: relative; }
.section-title {
  letter-spacing: -0.02em;
}
.section-header .section-title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin: 0.9rem auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  background-size: 200% 100%;
  animation: heroPanelSweep 5s linear infinite;
}
@media (prefers-reduced-motion: reduce) {
  .section-header .section-title::after { animation: none; }
}

/* Give the live-citation dot a gentle pulse to echo the hero status dot. */
.stat-live-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  vertical-align: middle;
  animation: heroStatusPulse 2.4s ease-out infinite;
}
@media (prefers-reduced-motion: reduce) {
  .stat-live-dot { animation: none; }
}

/* =========================================================================
   3. HONORS & AWARDS — rebuilt from scratch.
   Each card: a photocard (certificate preview, with gradient/icon fallback
   until an <img> is added) + a certificate button (pending until linked).
   New `*-v2` classes so the legacy .award-card rules in fixes.css don't apply;
   .award-title/.award-org/.award-date are re-scoped under .award-card-v2.
   ========================================================================= */
.awards-grid-v2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr));
  gap: clamp(1.25rem, 2.6vw, 1.9rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

.award-card-v2 {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: color-mix(in srgb, var(--bg-primary) 80%, transparent);
  border: 1px solid var(--border-color);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
          backdrop-filter: blur(12px) saturate(120%);
  box-shadow: var(--shadow-light);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.4s ease,
              border-color 0.4s ease;
}
.award-card-v2:hover {
  transform: translateY(-7px);
  box-shadow: 0 26px 60px -24px color-mix(in srgb, var(--primary-color) 55%, transparent),
              var(--shadow-large);
  border-color: color-mix(in srgb, var(--primary-color) 55%, transparent);
}

/* ---- Photocard (certificate preview) ---- */
.award-photo {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 20% 0%, color-mix(in srgb, var(--primary-color) 32%, transparent), transparent 60%),
    linear-gradient(135deg,
      color-mix(in srgb, var(--primary-color) 26%, var(--bg-secondary)),
      color-mix(in srgb, var(--secondary-color) 26%, var(--bg-secondary)));
  border-bottom: 1px solid var(--border-color);
}
/* Real certificate image (added later) sits on top and fills the card. */
.award-photo-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  z-index: 1;
}
/* Gradient/icon placeholder — hides automatically once an <img> is present. */
.award-photo-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(2.4rem, 6vw, 3.2rem);
  color: color-mix(in srgb, var(--text-primary) 28%, transparent);
  text-shadow: 0 4px 18px color-mix(in srgb, var(--primary-color) 40%, transparent);
}
.award-photo:has(.award-photo-img) .award-photo-fallback { display: none; }
/* subtle sheen sweep on hover */
.award-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, 0.14) 50%, transparent 65%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
  z-index: 2;
  pointer-events: none;
}
.award-card-v2:hover .award-photo::after { transform: translateX(120%); }

/* ---- Rank ribbon ---- */
.award-rank {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  padding: 0.3rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-radius: 999px;
  color: #1f2937;
  background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
  box-shadow: 0 4px 14px -4px rgba(0, 0, 0, 0.4);
}
.award-card-v2[data-rank="honor"]   .award-rank { background: linear-gradient(135deg, #fcd34d, #f59e0b); color: #422006; }
.award-card-v2[data-rank="bronze"]  .award-rank { background: linear-gradient(135deg, #f0a868, #c2682b); color: #2a1505; }
.award-card-v2[data-rank="finalist"].award-card-v2 .award-rank {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: #fff;
}

/* ---- Content ---- */
.award-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.25rem 0.75rem;
  flex: 1 1 auto;
}
.award-card-v2 .award-title {
  margin: 0;
  font-size: clamp(1.02rem, 2.3vw, 1.18rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}
.award-card-v2 .award-org {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
  overflow-wrap: anywhere;
}
.award-card-v2 .award-date {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: auto;
  width: fit-content;
  padding: 0.3rem 0.7rem;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 999px;
  color: var(--primary-color);
  background: color-mix(in srgb, var(--primary-color) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary-color) 28%, transparent);
}
.award-card-v2 .award-date i { font-size: 0.72rem; opacity: 0.85; }

/* ---- Certificate button ---- */
.award-actions {
  padding: 0.5rem 1.25rem 1.25rem;
}
.award-cert-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.7rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--primary-color) 70%, transparent);
  transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
}
.award-cert-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 16px 30px -12px color-mix(in srgb, var(--primary-color) 80%, transparent);
}
.award-cert-btn:active { transform: translateY(0); }
.award-cert-btn .award-cert-ext { font-size: 0.72rem; opacity: 0.85; }

/* Pending state — no certificate linked yet. Reads clearly as "coming soon"
   and is non-interactive, but keeps the button's footprint so the layout is
   final. Swap the <button> for an <a> (see the HTML comment) to activate. */
.award-cert-btn--pending {
  cursor: not-allowed;
  color: var(--text-secondary);
  background: color-mix(in srgb, var(--bg-secondary) 70%, transparent);
  border: 1px dashed color-mix(in srgb, var(--primary-color) 35%, var(--border-color));
  box-shadow: none;
}
.award-cert-btn--pending:hover { transform: none; filter: none; box-shadow: none; }
.award-cert-soon {
  margin-left: 0.15rem;
  padding: 0.05rem 0.45rem;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  color: var(--primary-color);
  background: color-mix(in srgb, var(--primary-color) 16%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  .award-card-v2, .award-photo::after, .award-cert-btn { transition: none; }
}

/* =========================================================================
   4. PUBLICATION CARDS — consistency fixes.
   - The header was hardcoded white (a bright bar in dark mode); make it
     theme-aware so it adapts to light/dark.
   - The "accent" research tag was hardcoded GREEN — off-palette and a leak in
     non-blue themes. Tie it to the real accent color (theme-aware).
   ========================================================================= */
.publication-header {
  background: color-mix(in srgb, var(--bg-primary) 88%, transparent);
}
[data-theme="dark"] .publication-header {
  background: color-mix(in srgb, var(--bg-secondary) 78%, transparent);
}
.publication-abstract {
  background: color-mix(in srgb, var(--bg-secondary) 55%, transparent);
}

.research-tag.accent {
  background: linear-gradient(135deg,
    rgba(var(--accent-tertiary-rgb), 0.15), rgba(var(--accent-tertiary-rgb), 0.1));
  color: var(--accent-color);
  border: 1px solid rgba(var(--accent-tertiary-rgb), 0.3);
}

/* =========================================================================
   5. RESPONSIVE
   ========================================================================= */
@media (max-width: 768px) {
  .hero-panel {
    width: min(96vw, 560px);
    padding: 1.5rem 1.25rem;
    border-radius: 22px;
  }
  .hero--immersive .hero-stats .stat { min-width: 88px; padding: 0.7rem 0.8rem; }
  .hero-status { font-size: 0.74rem; }
}
@media (max-width: 480px) {
  .awards-grid-v2 { grid-template-columns: 1fr; }
}

/* =========================================================================
   SKILLS GRID — now 4 category cards (added Generative AI/LLMs). Drop the old
   "3rd card spans full width" rule so all four sit in a clean, even 2x2 grid.
   ========================================================================= */
.skills-container {
  align-items: stretch;                 /* equal-height cards per row */
}
.skills-container .skill-category-card:nth-child(3) {
  grid-column: auto;                    /* was 1 / -1 (full-width) — cancel it */
}
.skills-container .skill-category-card {
  height: 100%;                         /* fill the grid cell for even rows */
}