/* ============================================================
   SynData4CV — modern academic theme
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  --c-bg:          #FAFAFB;
  --c-surface:     #FFFFFF;
  --c-surface-2:   #F4F3F7;
  --c-border:      #E7E5EE;
  --c-border-soft: #EFEDF3;
  --c-text:        #1A1625;
  --c-text-soft:   #4B4760;
  --c-muted:       #6B7280;
  --c-primary:     #39275B;
  --c-primary-2:   #5B3F8C;
  --c-accent:      #7B5BF0;
  --c-accent-soft: #EFEAFE;
  --c-warning:     #E0A458;
  --c-success:     #2D9B7E;

  --grad-primary:  linear-gradient(135deg, #39275B 0%, #5B3F8C 55%, #7B5BF0 100%);
  --grad-soft:     linear-gradient(135deg, #EFEAFE 0%, #F4F3F7 100%);

  --shadow-sm:  0 1px 2px rgba(26, 22, 37, 0.06);
  --shadow-md:  0 6px 16px -6px rgba(26, 22, 37, 0.12), 0 2px 4px -2px rgba(26, 22, 37, 0.08);
  --shadow-lg:  0 20px 40px -16px rgba(57, 39, 91, 0.22), 0 6px 12px -6px rgba(26, 22, 37, 0.10);

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-pill: 999px;

  --t-fast: 150ms ease;
  --t-base: 220ms cubic-bezier(.2,.7,.2,1);

  --container: 1100px;
  --container-narrow: 820px;

  --f-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --f-serif: 'Newsreader', 'Source Serif Pro', Georgia, 'Times New Roman', serif;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--c-primary-2);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover { color: var(--c-accent); }

p { margin: 0 0 1em; }

ul, ol { padding-left: 1.25em; margin: 0 0 1em; }
li { margin-bottom: 0.35em; }

strong { font-weight: 600; color: var(--c-text); }

hr {
  border: 0;
  border-top: 1px solid var(--c-border);
  margin: 3rem 0;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--f-sans);
  color: var(--c-text);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 4vw, 2.8rem); }

h2 {
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  letter-spacing: -0.02em;
  position: relative;
}

h3 { font-size: 1.2rem; }

/* H2 = section title with accent bar */
.main-content h2 {
  margin-top: 4rem;
  margin-bottom: 1.4rem;
  padding-left: 0.9rem;
  border-left: 4px solid;
  border-image: var(--grad-primary) 1;
}
.main-content h2:first-child { margin-top: 0; }

.main-content h3 {
  margin-top: 1.8rem;
  font-weight: 600;
  color: var(--c-primary);
}

/* ---------- Site navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border-soft);
}

.site-nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-nav__brand {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--c-text);
  letter-spacing: -0.01em;
}
.site-nav__brand:hover { color: var(--c-primary); }

.site-nav__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.site-nav__links a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  color: var(--c-text-soft);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--r-pill);
  transition: background var(--t-fast), color var(--t-fast);
}
.site-nav__links a:hover {
  background: var(--c-accent-soft);
  color: var(--c-primary);
}
.site-nav__links a.is-current {
  background: var(--c-text);
  color: #fff;
}
.site-nav__links a.is-current:hover { background: var(--c-primary); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  min-height: 540px;
  padding: 5rem 1.5rem 4.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: #1A1625;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: saturate(0.9);
  transform: scale(1.02);
}
.page-2024 .hero__bg { background-image: url('../../pics/seattle_view.jpg'); }
.page-2025 .hero__bg { background-image: url('../../pics/nashvile_view.jpg'); }
.page-2026 .hero__bg { background-image: url('../../pics/denver_view.jpg'); }

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 25% 0%, rgba(123, 91, 240, 0.35), transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(57, 39, 91, 0.55), transparent 55%),
    linear-gradient(180deg, rgba(20, 14, 37, 0.55) 0%, rgba(20, 14, 37, 0.78) 100%);
}

.hero__inner {
  max-width: var(--container);
  width: 100%;
  text-align: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--r-pill);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin-bottom: 1.2rem;
}

.hero__eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #A78BFA;
  box-shadow: 0 0 12px #A78BFA;
}

.hero__title {
  font-family: var(--f-sans);
  font-size: clamp(1.8rem, 4.4vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 1.2rem;
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.3);
}

.hero__title .hero__title-gradient {
  background: linear-gradient(120deg, #fff 0%, #C7B8FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  justify-content: center;
  margin: 0 0 2.2rem;
}

.hero__chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.9rem;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--r-pill);
  font-size: 0.92rem;
  font-weight: 500;
  color: #F5F2FF;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.hero__chip svg { width: 14px; height: 14px; flex-shrink: 0; opacity: 0.9; }

.hero__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.hero__btn {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.1rem;
  border-radius: var(--r-pill);
  font-size: 0.92rem;
  font-weight: 500;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.28);
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.hero__btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
  transform: translateY(-1px);
}

/* ---------- Main content container ---------- */
.main-content {
  max-width: var(--container);
  margin: 0 auto;
  padding: 4rem 1.5rem 2rem;
}

.prose {
  max-width: var(--container-narrow);
  margin: 0 auto;
  color: var(--c-text-soft);
  font-size: 1.02rem;
  line-height: 1.75;
}
.prose ul li { margin-bottom: 0.55em; }

/* ---------- People grid (speakers / organizers) ---------- */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0 0;
}

.person {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem 1rem 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-lg);
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.person:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.person__avatar {
  width: 130px; height: 130px;
  border-radius: 50%;
  padding: 3px;
  background: var(--grad-primary);
  margin-bottom: 0.9rem;
  display: block;
}
.person__avatar img {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--c-surface);
  background: var(--c-surface-2);
}

.person__name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-text);
  margin-bottom: 0.15rem;
}
.person__name a {
  color: inherit;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.person__name a:hover {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

.person__affil {
  font-size: 0.86rem;
  color: var(--c-muted);
  line-height: 1.4;
}

/* ---------- Schedule (timeline) ---------- */
.timeline {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 120px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-accent) 0%, var(--c-primary) 100%);
  opacity: 0.25;
}

.timeline__item {
  position: relative;
  padding: 0.85rem 0 0.85rem 150px;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.timeline__time {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 110px;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--c-muted);
  text-align: right;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: 115px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-surface);
  border: 2px solid var(--c-accent);
  box-shadow: 0 0 0 4px rgba(123, 91, 240, 0.08);
  z-index: 1;
}

.timeline__title {
  font-weight: 500;
  color: var(--c-text);
  flex: 1;
  min-width: 180px;
}
.timeline__title a { color: inherit; }
.timeline__title a:hover { color: var(--c-accent); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.62rem;
  border-radius: var(--r-pill);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.tag--talk    { background: var(--c-accent-soft); color: var(--c-primary); }
.tag--break   { background: #FEF3E2; color: #B5751F; }
.tag--poster  { background: #E2F5EE; color: #1F7A5C; }
.tag--opening { background: #E7E5EE; color: var(--c-text-soft); }
.tag--closing { background: #E7E5EE; color: var(--c-text-soft); }

.schedule-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0.25rem 0 1.25rem;
}
.schedule-meta__chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.85rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  font-size: 0.88rem;
  color: var(--c-text-soft);
}
.schedule-meta__chip strong { color: var(--c-text); }

/* ---------- Papers list ---------- */
.papers {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.paper {
  padding: 0.95rem 1.1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-md);
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.paper:hover {
  border-color: var(--c-accent);
  background: linear-gradient(180deg, #fff 0%, #FBFAFF 100%);
  transform: translateX(2px);
}

.paper__title {
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.45;
  margin-bottom: 0.18rem;
}
.paper__title a { color: var(--c-text); }
.paper__title a:hover { color: var(--c-accent); }

.paper__authors {
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.55;
}

.paper__poster {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.1rem 0.5rem;
  background: var(--c-accent-soft);
  color: var(--c-primary);
  border-radius: var(--r-pill);
  font-size: 0.75rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Awards */
.award {
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  background: var(--grad-soft);
  position: relative;
}
.award::before {
  content: "★";
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-size: 1.4rem;
  color: var(--c-warning);
}
.award__label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 0.5rem;
}
.award__title { font-weight: 600; color: var(--c-text); margin-bottom: 0.25rem; }
.award__authors { font-size: 0.9rem; color: var(--c-muted); }

/* ---------- Important dates ---------- */
.dates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 0;
  list-style: none;
  padding: 0;
}

.date-card {
  padding: 1.1rem 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-md);
  transition: transform var(--t-base), box-shadow var(--t-base);
}
.date-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.date-card--key {
  background: var(--grad-soft);
  border-color: transparent;
  position: relative;
  overflow: hidden;
}
.date-card--key::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-md);
  padding: 1.5px;
  background: var(--grad-primary);
  mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  -webkit-mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.date-card__label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 0.35rem;
}
.date-card__value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-text);
}

/* ---------- Workshops list ---------- */
.workshops {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  margin: 1rem 0 0;
  list-style: none;
  padding: 0;
}
.workshops a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-md);
  color: var(--c-text);
  font-weight: 500;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.workshops a::after {
  content: "→";
  color: var(--c-muted);
  transition: transform var(--t-fast), color var(--t-fast);
}
.workshops a:hover {
  border-color: var(--c-accent);
  background: linear-gradient(180deg, #fff 0%, #FBFAFF 100%);
  color: var(--c-primary);
}
.workshops a:hover::after {
  color: var(--c-accent);
  transform: translateX(3px);
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 5rem;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--c-border);
  text-align: center;
  color: var(--c-muted);
  font-size: 0.88rem;
  background: var(--c-surface);
}
.site-footer p { margin: 0.3rem 0; }
.site-footer a { color: var(--c-text-soft); }

/* ---------- Misc ---------- */
.text-center { text-align: center; }

/* Make the legacy markdown table fall back gracefully if it appears */
.main-content > table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}
.main-content > table td {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--c-border-soft);
  font-size: 0.95rem;
}
.main-content > table tr:first-child td { border-top: none; }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero { min-height: 460px; padding: 4rem 1.25rem 3.5rem; }
  .hero__title { font-size: clamp(1.5rem, 6.5vw, 2.2rem); }
  .main-content { padding: 3rem 1.25rem 1rem; }
  .main-content h2 { margin-top: 3rem; }

  .site-nav__inner { padding: 0.7rem 1rem; flex-wrap: wrap; }
  .site-nav__links { gap: 0.15rem; }
  .site-nav__links a { padding: 0.35rem 0.65rem; font-size: 0.82rem; }

  .timeline::before { left: 90px; }
  .timeline__item { padding-left: 116px; }
  .timeline__time { width: 80px; font-size: 0.8rem; }
  .timeline__item::before { left: 85px; }

  .person__avatar { width: 110px; height: 110px; }
}

@media (max-width: 480px) {
  .timeline::before { display: none; }
  .timeline__item { padding-left: 0; }
  .timeline__time {
    position: static;
    transform: none;
    width: auto;
    text-align: left;
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 600;
    color: var(--c-primary);
  }
  .timeline__item::before { display: none; }
  .timeline__item {
    padding: 0.9rem 1rem;
    background: var(--c-surface);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--r-md);
    margin-bottom: 0.4rem;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}