/* ============================================================
   CIVIC-AI Workshop — Stylesheet
   Palette: warm cream · navy anchor · cardinal red · orchid · gold
   Fonts: Nunito (body) + Crimson Pro (display)
   ============================================================ */

:root {
  --cream:          #F6F1E8;
  --cream-dark:     #EDE5D4;
  --dark-surface:   #162040;
  --primary-text:   #1C2B4A;
  --secondary-text: #5C6070;
  --text-on-dark:   #F6F1E8;
  --cardinal:       #8C1515;
  --orchid:         #8B5E96;
  --gold:           #C4963A;
  --gold-faint:     rgba(196, 150, 58, 0.35);
  --max-width:      900px;
}

/* --- RESET & BASE ----------------------------------------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Nunito', sans-serif;
  font-size: 11pt;
  line-height: 1.65;
  background: var(--cream);
  color: var(--primary-text);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--cardinal);
  text-decoration: underline;
}

/* --- NAVBAR ----------------------------------------------- */
#navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark-surface);
  border-bottom: 1px solid var(--gold-faint);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  font-family: 'Crimson Pro', serif;
  font-style: italic;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-on-dark);
  letter-spacing: 0.03em;
  padding: 0.7rem 0;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-brand:hover { color: var(--gold); text-decoration: none; }

.nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.nav-links a {
  display: block;
  padding: 0.7rem 0.75rem;
  color: rgba(246, 241, 232, 0.65);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-on-dark);
  border-bottom-color: var(--cardinal);
  text-decoration: none;
}

/* --- HERO ------------------------------------------------- */
#hero {
  background:
    linear-gradient(rgba(22, 32, 64, 0.72), rgba(22, 32, 64, 0.82)),
    url('img/hero_nus_com3.jpg')
    center / cover no-repeat;
  background-color: var(--dark-surface); /* fallback */
  padding: 6rem 1.5rem 5.5rem;
  text-align: center;
  color: var(--text-on-dark);
  border-bottom: 1px solid var(--gold-faint);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-label {
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.hero-acronym-small {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(246, 241, 232, 0.55);
  margin-top: 0.75rem;
  margin-bottom: 1.5rem;
}

#hero h1 {
  font-family: 'Crimson Pro', serif;
  font-style: italic;
  font-size: clamp(2.3rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-on-dark);
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  text-wrap: balance;
}

#hero h1 .hi {
  color: var(--gold);
}

.hero-meta {
  font-size: 1.2rem;
  color: rgba(246, 241, 232, 0.85);
  margin-bottom: 2.5rem;
  letter-spacing: 0.02em;
}

.hero-meta strong {
  color: var(--text-on-dark);
  font-weight: 700;
}

.hero-meta .sep {
  opacity: 0.4;
  margin: 0 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.9rem;
  border-radius: 3px;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
  cursor: pointer;
}

.btn-primary {
  background: var(--cardinal);
  color: var(--text-on-dark);
}
.btn-primary:hover {
  background: #a01818;
  color: var(--text-on-dark);
  text-decoration: none;
  transform: translateY(-1px);
}

/* --- SECTIONS --------------------------------------------- */
section {
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--gold-faint);
}

section:nth-of-type(even) {
  background: var(--cream-dark);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

section h2 {
  font-family: 'Crimson Pro', serif;
  font-style: italic;
  font-size: 2rem;
  font-weight: 600;
  color: var(--primary-text);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

/* --- ABOUT ------------------------------------------------ */
#about p {
  margin-bottom: 0.85rem;
  color: var(--primary-text);
}

.theme-list {
  list-style: none;
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.theme-list li {
  padding: 0.6rem 0.9rem 0.6rem 1.1rem;
  border-left: 3px solid var(--orchid);
  color: var(--primary-text);
  background: rgba(139, 94, 150, 0.05);
  border-radius: 0 3px 3px 0;
  line-height: 1.55;
}

.theme-list li strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary-text);
}

/* --- PROGRAMME -------------------------------------------- */
.programme-days {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 0.25rem;
}

@media (max-width: 580px) {
  .programme-days { grid-template-columns: 1fr; }
}

.day-card {
  background: var(--cream);
  border: 1px solid var(--cream-dark);
  border-top: 3px solid var(--gold);
  border-radius: 4px;
  padding: 1.5rem 1.25rem;
}

.day-card h3 {
  font-family: 'Crimson Pro', serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary-text);
  margin-bottom: 0.2rem;
}

.day-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--cardinal);
  font-weight: 700;
  margin-bottom: 1.1rem;
}

.schedule-row {
  display: flex;
  gap: 0.85rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--cream-dark);
  font-size: 0.88rem;
  align-items: baseline;
}
.schedule-row:last-child { border-bottom: none; }

.s-time {
  color: var(--secondary-text);
  min-width: 80px;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  font-size: 0.82rem;
  padding-top: 0.1rem;
}

.s-event { color: var(--primary-text); line-height: 1.45; }

.s-type {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--orchid);
  font-weight: 700;
  margin-bottom: 0.1rem;
}

/* --- SPEAKERS --------------------------------------------- */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2rem 1.5rem;
  margin-top: 0.5rem;
}

.speaker-card {
  text-align: center;
  background: #fff;
  border: 1px solid var(--cream-dark);
  border-radius: 10px;
  padding: 1.5rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

/* KEYNOTE badge */
.speaker-badge {
  position: absolute;
  top: -0.6rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--orchid);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.2rem 0.75rem;
  border-radius: 20px;
  white-space: nowrap;
}

.speaker-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  display: block;
  margin: 0.5rem auto 0.85rem;
  background: var(--cream-dark);
  border: 2px solid rgba(139, 94, 150, 0.35);
}

.speaker-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.speaker-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--primary-text);
  margin-bottom: 0.15rem;
}

.speaker-affil {
  font-size: 0.8rem;
  color: var(--secondary-text);
  margin-bottom: 0.75rem;
}

.speaker-talk-title {
  font-family: 'Crimson Pro', serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  text-align: left;
  width: 100%;
}

.speaker-abstract {
  font-size: 0.82rem;
  color: var(--secondary-text);
  line-height: 1.55;
  text-align: left;
  width: 100%;
}

/* Keep old .speaker-talk for backward compat */
.speaker-talk {
  font-family: 'Crimson Pro', serif;
  font-style: italic;
  font-size: 0.9rem;
  color: var(--primary-text);
  line-height: 1.4;
}

/* --- ORGANIZERS ------------------------------------------- */
.organizers-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2rem;
  margin-top: 0.5rem;
}

.organizer-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.organizer-photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--cream-dark);
  border: 2px solid var(--gold-faint);
}

.organizer-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Lab logo variant — wider, no circular crop */
.organizer-logo {
  width: 120px;
  height: 56px;
  border-radius: 6px;
  background: #fff;
}

.organizer-logo img {
  object-fit: contain;
  padding: 4px;
}

.organizer-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary-text);
}

.organizer-affil {
  font-size: 0.8rem;
  color: var(--secondary-text);
}

/* --- REGISTRATION ----------------------------------------- */
.reg-dates {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.date-chip {
  background: var(--dark-surface);
  color: var(--text-on-dark);
  border-radius: 4px;
  padding: 0.85rem 1.4rem;
  min-width: 170px;
}

.chip-label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.chip-date {
  font-family: 'Crimson Pro', serif;
  font-size: 1.1rem;
  font-weight: 600;
}

/* --- REGISTRATION note ------------------------------------ */
.reg-note {
  font-size: 0.85rem;
  color: var(--secondary-text);
  margin: -0.5rem 0 1.5rem;
  text-align: center;
}

.reg-centered {
  justify-content: center;
}

#registration .section-inner {
  text-align: center;
}

#registration .btn {
  display: inline-block;
}

/* --- PROGRAMME timezone note ------------------------------ */
.programme-tz {
  font-size: 0.82rem;
  color: var(--secondary-text);
  margin-bottom: 1rem;
}

/* --- COUNTDOWN TIMER -------------------------------------- */
.countdown-wrap {
  margin: 1.5rem auto 1.75rem;
  text-align: center;
}

.countdown-timer {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 10px;
  padding: 0.75rem 1.5rem;
  backdrop-filter: blur(4px);
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 3rem;
}

.countdown-unit span {
  font-family: 'Nunito', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.countdown-unit label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.65);
  margin-top: 0.2rem;
}

.countdown-sep {
  font-size: 1.6rem;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  align-self: flex-start;
  padding-top: 0.15rem;
}

.countdown-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  margin-top: 0.6rem;
}

.countdown-live {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gold);
}

/* --- CONTACT & ACKNOWLEDGEMENTS --------------------------- */
#contact p { margin-bottom: 0.6rem; }
#contact a { color: var(--cardinal); }
#contact a:hover { text-decoration: underline; }

.contact-intro {
  text-align: center;
}

.contact-email {
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.ack-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-text);
  margin: 1.5rem 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.ack-grant {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--secondary-text);
  line-height: 1.6;
  border-left: 3px solid var(--gold-faint);
  padding-left: 1rem;
}

/* --- FOOTER ----------------------------------------------- */
footer {
  background: var(--dark-surface);
  color: rgba(246, 241, 232, 0.45);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  border-top: 1px solid var(--gold-faint);
}

/* --- MOBILE NAV ------------------------------------------- */
@media (max-width: 640px) {
  .nav-inner { flex-direction: column; align-items: flex-start; gap: 0; }
  .nav-links { width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; }
  .nav-links a { white-space: nowrap; padding: 0.5rem 0.6rem; font-size: 0.75rem; }
  #hero { padding: 4rem 1.25rem 3.5rem; }
}