@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --green-900: #1b4332;
  --green-800: #2d6a4f;
  --green-700: #40916c;
  --green-500: #74c69d;
  --green-200: #d8f3dc;
  --green-50:  #f0f7f4;
  --white:     #ffffff;
  --gray-900:  #1c1c1e;
  --gray-700:  #3c3c3e;
  --gray-500:  #6c757d;
  --gray-100:  #f4f4f6;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
  --radius:    10px;
  --radius-lg: 16px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-900);
  background: var(--white);
}

/* ── NAV ─────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(27, 67, 50, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: 56px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  margin-right: auto;
}

.nav-logo svg { flex-shrink: 0; }

.nav-logo-text {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: 0.02em;
}

nav a {
  color: rgba(255,255,255,0.82);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.35rem 0.65rem;
  border-radius: 5px;
  transition: color 0.2s, background 0.2s;
}

nav a:hover {
  color: var(--white);
  background: rgba(255,255,255,0.12);
}

/* ── HERO ─────────────────────────────────────────────── */
.hero {
  background: linear-gradient(145deg, var(--green-900) 0%, var(--green-800) 60%, var(--green-700) 100%);
  color: var(--white);
  padding: 5rem 2rem 4.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 110%, rgba(116,198,157,0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero-bean {
  display: flex;
  justify-content: center;
  margin-bottom: 1.4rem;
}

.hero h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--green-500);
}

.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.88;
  font-weight: 300;
  margin-bottom: 1.6rem;
}

.hero-meta {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
  margin-top: 0.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  padding: 0.35rem 1rem;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ── LAYOUT ───────────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

section:nth-child(even) {
  background: var(--green-50);
}

.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-700);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--green-900);
  line-height: 1.25;
  margin-bottom: 2rem;
}

.section-title::after {
  content: '';
  display: block;
  width: 44px;
  height: 3px;
  background: var(--green-500);
  border-radius: 2px;
  margin-top: 0.6rem;
}

/* ── OVERVIEW ─────────────────────────────────────────── */
.overview-intro {
  font-size: 1.05rem;
  color: var(--gray-700);
  margin-bottom: 2.5rem;
}

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (max-width: 680px) {
  .overview-grid { grid-template-columns: 1fr; }
}

.overview-card {
  background: var(--white);
  border: 1px solid var(--green-200);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}

.overview-card h3 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--green-900);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.overview-card h3 .card-icon {
  width: 26px;
  height: 26px;
  background: var(--green-200);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.85rem;
}

.overview-card p {
  font-size: 0.93rem;
  color: var(--gray-700);
  line-height: 1.7;
}

/* ── TUTORIAL ─────────────────────────────────────────── */
.tutorial-intro {
  font-size: 1rem;
  color: var(--gray-700);
  margin-bottom: 2.5rem;
}

.schedule {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--green-200);
  box-shadow: var(--shadow-md);
}

.schedule-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  background: var(--white);
  border-bottom: 1px solid var(--green-200);
}

.schedule-item:last-child { border-bottom: none; }

.schedule-item.break {
  background: linear-gradient(90deg, var(--green-50) 0%, var(--white) 100%);
}

.schedule-item.break .schedule-body {
  color: var(--green-700);
  font-weight: 500;
}

.schedule-time {
  background: var(--green-900);
  color: rgba(255,255,255,0.9);
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 0.75rem;
  text-align: center;
  line-height: 1.4;
  flex-shrink: 0;
}

.schedule-item.break .schedule-time {
  background: var(--green-700);
}

.schedule-time .duration {
  margin-top: 0.2rem;
  font-size: 0.68rem;
  opacity: 0.7;
  font-weight: 400;
}

.schedule-body {
  padding: 1.1rem 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.25rem;
}

.schedule-body h4 {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--green-900);
  line-height: 1.35;
}

.schedule-body .presenter {
  font-size: 0.78rem;
  color: var(--gray-500);
  font-style: italic;
}

.schedule-body .sub-items {
  list-style: none;
  margin-top: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.schedule-body .sub-items li {
  font-size: 0.8rem;
  color: var(--gray-500);
  padding-left: 1rem;
  position: relative;
}

.schedule-body .sub-items li::before {
  content: '·';
  position: absolute;
  left: 0.3rem;
  color: var(--green-500);
}

.slides-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.4rem;
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--green-700);
  text-decoration: none;
  border: 1px solid var(--green-500);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  width: fit-content;
  transition: background 0.2s, color 0.2s;
}

.slides-link:hover {
  background: var(--green-700);
  color: var(--white);
  border-color: var(--green-700);
}

.slides-link svg { flex-shrink: 0; }

/* ── TOOLS ────────────────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
}

.tool-card {
  background: var(--white);
  border: 1px solid var(--green-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tool-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tool-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--green-900);
}

.tool-card p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
  flex: 1;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--green-700);
  text-decoration: none;
  margin-top: 0.25rem;
  transition: color 0.2s;
}

.tool-link:hover { color: var(--green-900); }

.tool-link svg { flex-shrink: 0; }

.tool-tbd {
  font-size: 0.78rem;
  color: var(--gray-500);
  font-style: italic;
  margin-top: 0.25rem;
}

/* ── PUBLICATIONS ─────────────────────────────────────── */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.pub-item {
  border-left: 3px solid var(--green-500);
  padding: 1rem 0 1rem 1.4rem;
}

.pub-venue {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--green-700);
  border-radius: 4px;
  padding: 0.15rem 0.55rem;
  margin-bottom: 0.5rem;
}

.pub-title {
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--green-900);
  line-height: 1.45;
  margin-bottom: 0.35rem;
}

.pub-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1.5px solid var(--green-500);
  transition: border-color 0.2s, color 0.2s;
}

.pub-title a:hover {
  color: var(--green-700);
  border-color: var(--green-700);
}

.pub-authors {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 0.25rem;
}

.pub-venue-full {
  font-size: 0.85rem;
  color: var(--gray-700);
  font-style: italic;
}

.pub-pdf-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--green-700);
  text-decoration: none;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.pub-pdf-link:hover { color: var(--green-900); }

.pub-tbd {
  display: inline-block;
  font-size: 0.76rem;
  color: var(--gray-500);
  font-style: italic;
  margin-top: 0.5rem;
}

/* ── PEOPLE ───────────────────────────────────────────── */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.person-card {
  background: var(--white);
  border: 1px solid var(--green-200);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.person-avatar {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-700), var(--green-500));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  flex-shrink: 0;
}

.person-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--green-900);
}

.person-card .role {
  font-size: 0.82rem;
  color: var(--green-700);
  font-weight: 500;
  margin-top: -0.4rem;
}

.person-card p {
  font-size: 0.87rem;
  color: var(--gray-700);
  line-height: 1.68;
}

.person-card h3 a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1.5px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}

.person-card h3 a:hover {
  color: var(--green-700);
  border-bottom-color: var(--green-500);
}

/* ── SPONSORS ─────────────────────────────────────────── */
.affiliation-bar {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--gray-500);
  font-size: 0.92rem;
}

.affiliation-bar strong {
  color: var(--green-900);
}

.sponsors-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
}

.sponsor-badge {
  background: var(--white);
  border: 1px solid var(--green-200);
  border-radius: var(--radius-lg);
  padding: 1.1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.sponsor-badge:hover { box-shadow: var(--shadow-md); }

.sponsor-badge span {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green-900);
  text-align: center;
  line-height: 1.4;
}

/* ── FOOTER ───────────────────────────────────────────── */
footer {
  background: var(--green-900);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 2rem;
  font-size: 0.82rem;
}

footer a {
  color: var(--green-500);
  text-decoration: none;
}

footer a:hover { text-decoration: underline; }

footer strong {
  color: rgba(255,255,255,0.9);
}