/* ===== ICBM Conference — New Theme ===== */
:root {
  --primary: #112369;
  --primary-light: #1a3399;
  --primary-dark: #0b1745;
  --secondary: #D82C20;
  --secondary-light: #e8453a;
  --secondary-dark: #b01f16;
  --accent: #c9a84c;
  --text: #222;
  --text-light: #555;
  --text-muted: #888;
  --bg: #fff;
  --bg-alt: #f4f6fb;
  --bg-dark: #0d1b3e;
  --border: #dde2ee;
  --radius: 10px;
  --shadow: 0 2px 16px rgba(17,35,105,.08);
  --shadow-lg: 0 8px 32px rgba(17,35,105,.12);
  --transition: .3s ease;
  --max-w: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; color: var(--text); background: var(--bg); line-height: 1.7; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--secondary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; color: var(--primary); margin-bottom: 12px; position: relative; display: inline-block; }
.section-header h2::after { content: ''; display: block; width: 60px; height: 3px; background: var(--secondary); margin: 12px auto 0; border-radius: 2px; }
.section-header p { color: var(--text-light); font-size: 1.05rem; max-width: 700px; margin: 0 auto; }
.mt-4 { margin-top: 24px; }

/* ===== BUTTONS ===== */
.btn { display: inline-block; padding: 12px 28px; border-radius: var(--radius); font-weight: 600; font-size: .95rem; cursor: pointer; transition: all var(--transition); border: 2px solid transparent; text-align: center; }
.btn-primary { background: var(--secondary); color: #fff; border-color: var(--secondary); }
.btn-primary:hover { background: var(--secondary-dark); border-color: var(--secondary-dark); color: #fff; }
.btn-outline { background: transparent; color: #fff; border-color: #fff; }
.btn-outline:hover { background: #fff; color: var(--primary); }
.btn-outline-dark { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline-dark:hover { background: var(--primary); color: #fff; }

/* ===== HEADER / NAVBAR ===== */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: #fff; transition: box-shadow var(--transition); }
.site-header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.1); }
.navbar { display: flex; align-items: center; justify-content: space-between; padding: 0 24px; max-width: var(--max-w); margin: 0 auto; height: 72px; }
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand img { height: 48px; width: auto; }
.nav-brand .brand-text { display: flex; flex-direction: column; }
.nav-brand .logo-text { font-size: 1.3rem; font-weight: 800; color: var(--primary); letter-spacing: 1px; line-height: 1.2; }
.nav-brand .logo-sub { font-size: .7rem; color: var(--secondary); font-weight: 600; letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links > li > a { padding: 8px 14px; font-weight: 600; font-size: .88rem; color: var(--primary); text-transform: uppercase; letter-spacing: .5px; border-radius: 6px; transition: all var(--transition); }
.nav-links > li > a:hover, .nav-links > li > a.active { color: var(--secondary); background: rgba(216,44,32,.06); }
.nav-dropdown { position: relative; }
.dropdown-menu { position: absolute; top: 100%; left: 0; background: #fff; min-width: 220px; border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(8px); transition: all var(--transition); z-index: 100; }
.nav-dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu li a { display: block; padding: 8px 20px; font-size: .85rem; color: var(--text); font-weight: 500; }
.dropdown-menu li a:hover { background: var(--bg-alt); color: var(--secondary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--primary); margin: 5px 0; transition: all var(--transition); border-radius: 2px; }

/* ===== HERO ===== */
.hero { min-height: 700px; display: flex; align-items: center; justify-content: center; text-align: center; background: url('../../maju.webp') center/cover no-repeat; color: #fff; padding: 120px 24px 80px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: rgba(11, 25, 68, 0.72); }
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero .overline { font-size: .9rem; text-transform: uppercase; letter-spacing: 3px; color: var(--accent); margin-bottom: 12px; font-weight: 600; }
.hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; line-height: 1.2; }
.hero h1 span { color: var(--accent); }

/* Clean footer (homepage) */
.footer-clean { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.footer-social { display: flex; align-items: center; gap: 24px; }
.footer-social a { color: #fff; transition: opacity .2s; }
.footer-social a:hover { opacity: .7; }
.footer-contact-link { color: #fff; font-size: .95rem; font-weight: 600; transition: opacity .2s; }
.footer-contact-link:hover { opacity: .7; }
.site-footer:has(.footer-clean) { padding: 0; }
.hero-white-title h1, .hero-white-title h1 span { color: #fff !important; }
.hero .subtitle { font-size: 1.1rem; opacity: .9; margin-bottom: 8px; }
.hero .meta { font-size: .95rem; opacity: .8; margin-bottom: 28px; }
.hero .hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }
.hero-small { min-height: 340px; }

/* ===== CARDS ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.card { background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card h3 { font-size: 1.15rem; color: var(--primary); margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: .92rem; }
.card .card-icon { font-size: 2rem; margin-bottom: 12px; }

/* ===== YEAR CARDS (Home) ===== */
.year-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px; }
.year-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border); }
.year-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.year-card .year-card-header { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; padding: 28px; }
.year-card .year-card-header h3 { font-size: 1.4rem; margin-bottom: 4px; }
.year-card .year-card-header .theme { font-size: .88rem; opacity: .85; font-style: italic; }
.year-card .year-card-body { padding: 24px; }
.year-card .year-card-body p { color: var(--text-light); font-size: .92rem; margin-bottom: 12px; }
.year-card .year-card-body .date-badge { display: inline-block; background: var(--bg-alt); color: var(--primary); padding: 4px 12px; border-radius: 20px; font-size: .82rem; font-weight: 600; margin-bottom: 16px; }
.year-card .year-card-footer { padding: 0 24px 24px; }

/* ===== TRACKS ===== */
.tracks-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.track-card { background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); border-left: 4px solid var(--secondary); transition: all var(--transition); }
.track-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.track-card h3 { font-size: 1rem; color: var(--primary); margin-bottom: 12px; text-transform: uppercase; letter-spacing: .5px; }
.track-card ul { padding-left: 18px; list-style: disc; }
.track-card ul li { font-size: .9rem; color: var(--text-light); margin-bottom: 4px; }
.track-card .track-chairs { margin-top: 12px; font-size: .82rem; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 10px; }
.track-card .track-chairs strong { color: var(--primary); }

/* ===== PERSON / CHAIR / SPEAKER CARDS ===== */
.people-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.person-card { background: #fff; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); text-align: center; transition: all var(--transition); }
.person-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.person-card img { width: 100px; height: 100px; border-radius: 50%; object-fit: cover; margin: 0 auto 14px; border: 3px solid var(--bg-alt); }
.person-card h4 { color: var(--primary); font-size: 1rem; margin-bottom: 4px; }
.person-card .role { color: var(--secondary); font-size: .82rem; font-weight: 600; margin-bottom: 6px; }
.person-card .affiliation { color: var(--text-muted); font-size: .82rem; margin-bottom: 8px; }
.person-card p { font-size: .85rem; color: var(--text-light); text-align: left; }

/* Person detail (full bio) */
.person-detail { background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); display: flex; gap: 24px; align-items: flex-start; margin-bottom: 20px; transition: all var(--transition); }
.person-detail:hover { box-shadow: var(--shadow-lg); }
.person-detail img { width: 110px; height: 110px; border-radius: 50%; object-fit: cover; flex-shrink: 0; border: 3px solid var(--bg-alt); }
.person-detail .person-info h4 { color: var(--primary); font-size: 1.05rem; margin-bottom: 2px; }
.person-detail .person-info .role { color: var(--secondary); font-size: .82rem; font-weight: 600; }
.person-detail .person-info .affiliation { color: var(--text-muted); font-size: .82rem; margin-bottom: 8px; }
.person-detail .person-info p { font-size: .88rem; color: var(--text-light); }

/* ===== SPEAKER POSTER GRID (2025) ===== */
.speaker-poster-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.speaker-poster-card { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); cursor: pointer; transition: all var(--transition); }
.speaker-poster-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.speaker-poster-card img { width: 100%; height: auto; display: block; }

/* Modal overlay for speaker posters */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.85); z-index: 2000; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.active { display: flex; }
.modal-overlay img { max-width: 90vw; max-height: 90vh; border-radius: var(--radius); }
.modal-overlay .modal-close { position: absolute; top: 20px; right: 30px; font-size: 2rem; color: #fff; cursor: pointer; background: none; border: none; line-height: 1; }

/* ===== SUBMISSION TYPES ===== */
.submission-types { display: grid; gap: 20px; max-width: 900px; margin: 0 auto; }
.sub-type { background: #fff; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); border-left: 4px solid var(--secondary); }
.sub-type h4 { color: var(--primary); margin-bottom: 4px; }
.sub-type .limit { display: inline-block; background: var(--bg-alt); color: var(--secondary); font-size: .78rem; font-weight: 700; padding: 2px 10px; border-radius: 12px; margin-bottom: 8px; }
.sub-type-desc { font-size: .9rem; color: var(--text-light); margin-bottom: 10px; }
.review-toggle { background: none; border: none; color: var(--primary); font-weight: 600; font-size: .85rem; cursor: pointer; display: flex; align-items: center; gap: 6px; padding: 4px 0; }
.review-toggle:hover { color: var(--secondary); }
.review-toggle .arrow { font-size: .7rem; transition: transform var(--transition); }
.review-toggle.open .arrow { transform: rotate(90deg); }
.review-criteria { display: none; margin-top: 10px; padding: 14px; background: var(--bg-alt); border-radius: 8px; }
.review-criteria.open { display: block; }
.review-criteria ul { padding-left: 18px; list-style: disc; }
.review-criteria ul li { font-size: .85rem; color: var(--text-light); margin-bottom: 4px; }

/* ===== SUBMISSION DETAILS ===== */
.submission-details { max-width: 900px; margin: 36px auto 0; }
.submission-details h3 { color: var(--primary); font-size: 1.2rem; margin: 30px 0 16px; }
.instruction-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.instruction-item { background: #fff; border-radius: 8px; padding: 16px; box-shadow: 0 1px 6px rgba(0,0,0,.05); border: 1px solid var(--border); }
.instruction-item strong { display: block; color: var(--primary); font-size: .88rem; margin-bottom: 4px; }
.instruction-item span { font-size: .84rem; color: var(--text-light); }
.page-limits-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: .9rem; }
.page-limits-table th { background: var(--primary); color: #fff; padding: 10px 14px; text-align: left; }
.page-limits-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.formatting-list { max-width: 900px; margin: 0 auto; padding-left: 20px; list-style: disc; }
.formatting-list li { font-size: .9rem; color: var(--text-light); margin-bottom: 8px; }
.formatting-list li strong { color: var(--text); }
.resources-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 12px; }
.resource-link { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: #fff; border: 1px solid var(--border); border-radius: 8px; font-size: .85rem; font-weight: 500; color: var(--primary); transition: all var(--transition); }
.resource-link:hover { border-color: var(--secondary); color: var(--secondary); transform: translateY(-2px); box-shadow: var(--shadow); }
.resource-link .icon { font-size: 1.2rem; }

/* ===== REGISTRATION TABLE ===== */
.reg-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.reg-table th { background: var(--primary); color: #fff; padding: 12px 14px; text-align: left; font-size: .82rem; text-transform: uppercase; letter-spacing: .5px; }
.reg-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.reg-table tr:hover td { background: var(--bg-alt); }

/* ===== KEY DATES TABLE ===== */
.dates-table { width: 100%; border-collapse: collapse; font-size: .9rem; max-width: 700px; margin: 0 auto; }
.dates-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.dates-table td:first-child { font-weight: 600; color: var(--primary); }
.dates-table tr:last-child td { border-bottom: none; }

/* ===== JOURNALS LIST ===== */
.journals-list { max-width: 800px; margin: 0 auto; }
.journal-item { padding: 16px; background: #fff; border-radius: 8px; margin-bottom: 10px; box-shadow: 0 1px 4px rgba(0,0,0,.04); border: 1px solid var(--border); display: flex; align-items: center; gap: 12px; }
.journal-item .j-num { width: 32px; height: 32px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: .78rem; font-weight: 700; flex-shrink: 0; }
.journal-item a { font-weight: 500; font-size: .9rem; }

/* ===== DOWNLOADS ===== */
.downloads-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.download-item { display: flex; align-items: center; gap: 12px; padding: 16px; background: #fff; border-radius: 8px; border: 1px solid var(--border); box-shadow: 0 1px 4px rgba(0,0,0,.04); transition: all var(--transition); }
.download-item:hover { border-color: var(--secondary); transform: translateY(-2px); box-shadow: var(--shadow); }
.download-item .dl-icon { font-size: 1.4rem; }
.download-item span { font-size: .88rem; color: var(--primary); font-weight: 500; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.contact-card { background: #fff; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); border-top: 3px solid var(--secondary); }
.contact-card h4 { color: var(--primary); margin-bottom: 4px; }
.contact-card .contact-role { font-size: .82rem; color: var(--secondary); font-weight: 600; margin-bottom: 10px; }
.contact-card p { font-size: .88rem; color: var(--text-light); margin-bottom: 4px; }
.contact-card a { color: var(--primary); font-weight: 500; }

/* ===== FOOTER ===== */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.8); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; padding-bottom: 40px; }
.footer-col h4 { color: #fff; margin-bottom: 14px; font-size: 1.05rem; }
.footer-col p { font-size: .88rem; margin-bottom: 8px; }
.footer-col ul li { margin-bottom: 6px; }
.footer-col ul li a { color: rgba(255,255,255,.7); font-size: .88rem; }
.footer-col ul li a:hover { color: var(--accent); }
.footer-col a { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; text-align: center; font-size: .82rem; color: rgba(255,255,255,.5); }

/* ===== SCROLL TO TOP ===== */
.scroll-top { position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px; border-radius: 50%; background: var(--secondary); color: #fff; border: none; font-size: 1.2rem; cursor: pointer; opacity: 0; visibility: hidden; transition: all var(--transition); z-index: 999; box-shadow: var(--shadow); }
.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { background: var(--secondary-dark); transform: translateY(-3px); }

/* Countdown */
.cd-box { background: rgba(255,255,255,.15); backdrop-filter: blur(6px); border-radius: 12px; padding: 16px 22px; min-width: 80px; text-align: center; }
.cd-num { display: block; font-size: 2.2rem; font-weight: 800; color: #fff; line-height: 1.1; }
.cd-label { display: block; font-size: .75rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,.8); margin-top: 4px; }

/* ===== ANIMATIONS ===== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== ACCORDION ===== */
.accordion { max-width: 800px; margin: 0 auto; }
.accordion-item { background: #fff; border-radius: 8px; margin-bottom: 8px; box-shadow: 0 1px 4px rgba(0,0,0,.04); border: 1px solid var(--border); overflow: hidden; }
.accordion-header { padding: 16px 20px; font-weight: 600; color: var(--primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-size: .95rem; }
.accordion-header:hover { background: var(--bg-alt); }
.accordion-header .arrow { transition: transform var(--transition); font-size: .8rem; }
.accordion-item.open .accordion-header .arrow { transform: rotate(180deg); }
.accordion-body { padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .4s ease; }
.accordion-item.open .accordion-body { max-height: 600px; padding: 0 20px 16px; }
.accordion-body p, .accordion-body li { font-size: .9rem; color: var(--text-light); }

/* ===== COMMITTEE SECTION ===== */
.committee-group { margin-bottom: 36px; }
.committee-group h3 { color: var(--primary); font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 2px solid var(--secondary); display: inline-block; }
.committee-list { font-size: .9rem; color: var(--text-light); line-height: 1.8; }
.committee-list strong { color: var(--text); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.8rem; }
  .hero { min-height: 400px; padding: 90px 16px 40px; }
  .section { padding: 50px 0; }
  .section-header h2 { font-size: 1.5rem; }
  .nav-links { position: fixed; top: 72px; left: 0; width: 100%; background: #fff; flex-direction: column; padding: 20px; gap: 0; box-shadow: var(--shadow-lg); transform: translateY(-120%); transition: transform var(--transition); z-index: 99; max-height: calc(100vh - 72px); overflow-y: auto; }
  .nav-links.open { transform: translateY(0); }
  .nav-links > li { width: 100%; }
  .nav-links > li > a { display: block; padding: 12px 16px; }
  .nav-toggle { display: block; }
  .dropdown-menu { position: static; box-shadow: none; opacity: 1; visibility: visible; transform: none; padding-left: 16px; display: none; }
  .nav-dropdown.open .dropdown-menu { display: block; }
  .person-detail { flex-direction: column; align-items: center; text-align: center; }
  .person-detail .person-info p { text-align: center; }
  .card-grid, .tracks-grid, .people-grid { grid-template-columns: 1fr; }
  .year-cards { grid-template-columns: 1fr; }
}