/* ============================================================
   HOME — hero, program, speakers, info, partners
   ============================================================ */

/* ---------- HERO ---------- */
.hero { position: relative; min-height: 68vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-slides { position: relative; width: 100%; min-height: 68vh; }
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease-in-out; display: flex; align-items: center; justify-content: center; }
.hero-slide.active { opacity: 1; z-index: 1; }

.hero-bg { position: absolute; inset: 0; }
.hero-bg-1 { background: linear-gradient(135deg, #eaf3ff 0%, #f7fbff 45%, #e8f0ff 100%); }
.hero-bg-2 { background: linear-gradient(135deg, #eef4ff 0%, #ffffff 50%, #e9f2ff 100%); }
.hero-bg-3 { background: linear-gradient(135deg, #e8f1ff 0%, #f4f9ff 55%, #eaf3ff 100%); }
.hero-bg::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 25% 40%, rgba(0,108,238,0.10) 0%, transparent 45%),
              radial-gradient(circle at 78% 30%, rgba(25,77,165,0.08) 0%, transparent 45%);
}
/* 옅은 도트 그리드 */
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(0,108,238,0.08) 1px, transparent 1px);
  background-size: 26px 26px; opacity: 0.5;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
          mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
}

.hero-content { position: relative; z-index: 2; text-align: center; padding: 120px 24px 52px; max-width: 920px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px; border-radius: 50px;
  background: rgba(0,108,238,0.10); border: 1px solid rgba(0,108,238,0.22);
  color: var(--blue); font-size: 14px; font-weight: 600; margin-bottom: 24px;
}
.hero-title { font-family: var(--font-heading); font-size: clamp(2rem, 5vw, 3.8rem); color: var(--text-strong); font-weight: 500; margin-bottom: 20px; line-height: 1.15; }
.hero-title strong {
  display: block; font-weight: 800;
  background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-ddd { text-align: center; font-family: var(--font-heading); font-weight: 800; font-size: 1.68rem; letter-spacing: 6px; color: #ff9a33; margin: 0 0 10px; }
.ddd-letter { color: #ff9a33; font-size: 1.2em; font-weight: 800; }
.hero-info { display: flex; align-items: center; justify-content: center; gap: 16px; color: var(--text-muted); font-size: 16px; margin-bottom: 32px; flex-wrap: wrap; }
.hero-info-date { margin-bottom: 8px; }
.hero-info .divider { width: 4px; height: 4px; border-radius: 50%; background: var(--text-dim); }

.countdown { display: flex; justify-content: center; gap: 10px; margin-bottom: 22px; }
.countdown-box {
  display: flex; flex-direction: column; align-items: center;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 8px 12px; min-width: 54px; box-shadow: var(--shadow-sm);
}
.countdown-num { font-family: var(--font-heading); font-size: 1.35rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.countdown-label { font-size: 9px; color: var(--text-dim); letter-spacing: 1.5px; margin-top: 3px; font-weight: 600; }

.hero-cta { display: flex; gap: 16px; justify-content: center; margin-bottom: 16px; flex-wrap: wrap; }
.hero-free { font-size: 13px; color: var(--text-dim); font-style: italic; }

.slide-controls { position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 10px; z-index: 10; }
.slide-btn {
  width: 30px; height: 22px; border-radius: 50px; border: 1px solid var(--border);
  background: #fff; color: var(--navy); cursor: pointer; font-size: 11px;
  display: flex; align-items: center; justify-content: center; transition: all var(--transition); box-shadow: var(--shadow-sm);
}
.slide-btn:hover { border-color: var(--blue); color: var(--blue); }
.slide-dots { display: flex; gap: 8px; }
.slide-dot { width: 10px; height: 10px; border-radius: 50%; border: none; background: #cdd9e6; cursor: pointer; transition: all var(--transition); }
.slide-dot.active { background: var(--blue); transform: scale(1.3); }

/* ---------- PROGRAM ---------- */
.program-section { padding: 56px 0; }
.day-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; flex-wrap: wrap; }
.day-tab {
  padding: 8px 60px; border-radius: 50px; border: 1px solid var(--border);
  background: #fff; color: var(--text-muted); font-weight: 700; font-size: 15px;
  cursor: pointer; transition: all var(--transition); font-family: var(--font-heading);
}
.day-tab span { display: inline; font-size: 12px; font-weight: 500; color: var(--text-dim); margin-top: 0; margin-left: 8px; }
.day-tab.active, .day-tab:hover { background: var(--gradient); color: #fff; border-color: transparent; box-shadow: 0 6px 18px rgba(0,108,238,0.25); }
.day-tab.active span, .day-tab:hover span { color: rgba(255,255,255,0.85); }

.day-panel { display: none; }
.day-panel.active { display: block; }
.day-venue {
  display: inline-block; margin-left: 50%; transform: translateX(-50%);
  text-align: center; color: var(--navy); font-size: 14px; font-weight: 600; margin-bottom: 24px;
  padding: 8px 20px; background: var(--bg-tint); border-radius: 50px; border: 1px solid rgba(0,108,238,0.15);
}

.session-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; transition: all var(--transition); box-shadow: var(--shadow-sm); }
.session-card:hover { border-color: rgba(0,108,238,0.3); box-shadow: var(--shadow); }
.session-card.active { border-color: var(--blue); }
.session-header { padding: 20px 24px; cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.session-label { flex: 1; }
.session-num { display: inline-block; font-size: 12px; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; padding: 2px 10px; background: rgba(0,108,238,0.1); border-radius: 4px; }
.session-header h3 { font-size: 16px; font-weight: 700; color: var(--text-strong); line-height: 1.5; }
.session-header h3 em { font-style: italic; color: var(--navy); font-weight: 500; font-size: 14px; }
.session-toggle { font-size: 24px; color: var(--blue); flex-shrink: 0; width: 32px; text-align: center; }

.session-body { max-height: 0; overflow: hidden; transition: max-height 0.5s cubic-bezier(0.4,0,0.2,1); padding: 0 24px; }
.session-card.active .session-body { padding-bottom: 24px; }

.organizer-badge { display: flex; align-items: baseline; gap: 8px; margin-bottom: 16px; padding: 12px 16px; background: rgba(25,77,165,0.06); border-radius: var(--radius-xs); border-left: 3px solid var(--navy); }
.organizer-badge span { font-size: 12px; font-weight: 700; color: var(--navy); text-transform: uppercase; letter-spacing: 1px; white-space: nowrap; }
.organizer-badge { font-size: 14px; color: var(--text-muted); }

.talk-item { display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--border-soft, #eef2f6); align-items: flex-start; }
.talk-item:last-child { border-bottom: none; }
.talk-time { font-size: 14px; font-weight: 700; color: var(--blue); white-space: nowrap; min-width: 100px; font-family: var(--font-heading); }
.talk-detail { flex: 1; }
.talk-title { font-size: 14px; color: var(--text); margin-bottom: 4px; line-height: 1.5; font-weight: 500; }
.talk-speaker { font-size: 13px; color: var(--text-muted); }
.panel-discussion { opacity: 0.7; }
.panel-discussion .talk-title { font-style: italic; }

.chair-info { display: flex; align-items: baseline; gap: 8px; margin-top: 16px; padding: 12px 16px; background: rgba(0,108,238,0.05); border-radius: var(--radius-xs); border-left: 3px solid var(--blue); font-size: 14px; color: var(--text-muted); }
.chair-info span { font-size: 12px; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: 1px; }

/* ---------- PROGRAM AT A GLANCE (timetable) ---------- */
.glance-day { display: none; }
.glance-day.active { display: block; }
.glance-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.glance-table thead th { background: var(--gradient); color: #fff; text-align: left; padding: 18px 22px; font-family: var(--font-heading); font-size: 16px; line-height: 1.5; }
.glance-table thead th .bold { font-weight: 700; }
.glance-table .g-venue { font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.85); }
.glance-table td { border-top: 1px solid var(--border); vertical-align: middle; }
.g-time { width: 28%; padding: 16px 18px; font-family: var(--font-heading); font-weight: 700; font-size: 14px; color: var(--blue); background: var(--bg-tint); white-space: nowrap; }
.g-host { display: block; max-width: 92px; max-height: 30px; margin-top: 8px; object-fit: contain; }
.g-cont { padding: 0; }
.g-extra .g-cont { padding: 14px 22px; font-size: 14px; font-weight: 600; color: var(--text-muted); }
.g-extra .g-time { color: var(--text-dim); background: #fbfcfe; }
.g-kind-meal .g-cont, .g-kind-event .g-cont { color: var(--navy); }
.g-session { cursor: pointer; }
.g-sess-btn { width: 100%; display: flex; align-items: center; gap: 14px; padding: 16px 22px; background: none; border: none; text-align: left; cursor: pointer; font-family: var(--font-body); }
.g-session:hover .g-cont { background: rgba(0,108,238,0.04); }
.g-sess-num { flex-shrink: 0; font-family: var(--font-heading); font-size: 12px; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: 1px; padding: 3px 10px; background: rgba(0,108,238,0.1); border-radius: 4px; }
.g-sess-title { flex: 1; font-size: 15px; font-weight: 700; color: var(--text-strong); line-height: 1.45; }
.g-sess-title em { font-style: italic; font-weight: 500; font-size: 13px; color: var(--navy); }
.g-toggle { flex-shrink: 0; font-size: 22px; color: var(--blue); width: 28px; text-align: center; }
.g-detail-row { display: none; }
.g-detail-row.open { display: table-row; }
.g-detail { padding: 4px 22px 22px; background: #fbfcfe; }
.glance-table .g-detail .talk-list { margin-top: 4px; }

/* ---------- SPEAKERS ---------- */
.speakers-section { padding: 56px 0 28px; background: var(--bg-secondary); }
.speakers-carousel-wrap { position: relative; padding: 0 48px; }
.speakers-carousel { overflow: hidden; }
.speakers-track { display: flex; transition: transform 0.5s cubic-bezier(0.4,0,0.2,1); }
.speaker-card { flex: 0 0 20%; padding: 12px; box-sizing: border-box; text-align: center; }
.speaker-img {
  width: 150px; height: 150px; border-radius: 50%; margin: 0 auto 16px; overflow: hidden; position: relative;
  background: #e9f1fb; border: 3px solid #fff; box-shadow: 0 6px 18px rgba(16,40,80,0.12); transition: all var(--transition);
}
.speaker-img img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.speaker-card:hover .speaker-img { border-color: var(--blue); transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,108,238,0.22); }
.speaker-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-family: var(--font-heading); font-size: 32px; font-weight: 700; color: var(--blue); background: #e9f1fb; }
.speaker-card h4 { font-size: 15px; color: var(--text-strong); margin-bottom: 4px; }
.speaker-card p { font-size: 12px; color: var(--text-muted); line-height: 1.4; }

.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border);
  background: #fff; color: var(--navy); cursor: pointer; font-size: 18px;
  display: flex; align-items: center; justify-content: center; transition: all var(--transition); box-shadow: var(--shadow-sm);
}
.carousel-btn:hover { border-color: var(--blue); color: var(--blue); }
.carousel-prev { left: 0; }
.carousel-next { right: 0; }
.speakers-more { text-align: center; margin-top: 40px; }

/* ---------- INFO CARDS ---------- */
.info-section { padding: 100px 0; }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.info-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 48px 40px; text-align: center; transition: all var(--transition); position: relative; overflow: hidden; box-shadow: var(--shadow-sm); }
.info-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); opacity: 0; transition: opacity var(--transition); }
.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.info-card:hover::before { opacity: 1; }
.info-card-icon { margin-bottom: 20px; color: var(--blue); display: flex; justify-content: center; }
.info-card h3 { font-size: 22px; margin-bottom: 12px; }
.info-highlight { color: var(--navy); font-weight: 700; margin-bottom: 8px; }
.info-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 20px; }
.info-card-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- PARTNERS ---------- */
.partners-section { padding: 20px 0 48px; }
.partners-marquee { overflow: hidden; position: relative; }
.partners-marquee::before, .partners-marquee::after { content: ''; position: absolute; top: 0; bottom: 0; width: 80px; z-index: 2; }
.partners-marquee::before { left: 0; background: linear-gradient(to right, var(--bg-primary), transparent); }
.partners-marquee::after { right: 0; background: linear-gradient(to left, var(--bg-primary), transparent); }
.partners-track { display: flex; gap: 32px; animation: marquee 30s linear infinite; width: max-content; }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.partner-logo {
  display: flex; align-items: center; justify-content: center;
  min-width: 180px; height: 90px; padding: 16px 28px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: all var(--transition); filter: grayscale(60%); opacity: 0.85;
}
.partner-logo img { max-height: 56px; width: auto; object-fit: contain; }
.partner-logo:hover { filter: none; opacity: 1; border-color: var(--blue); box-shadow: var(--shadow-sm); }