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

:root {
  --bg:       #f7f6f2;
  --surface:  #ffffff;
  --surface2: #eeecea;
  --border:   rgba(0, 0, 0, 0.08);
  --accent:   #6b2191;
  --accent-light: #f3e8ff;
  --text:     #111827;
  --muted:    #6b7280;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Outfit', sans-serif;
  --font-mono:    'Space Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.accent { color: var(--accent); }

/* === NAVIGATION === */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 20px 0;
  transition: all 0.3s ease;
}
nav.scrolled {
  background: rgba(247, 246, 242, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; }
.nav-logo-img { height: 40px; width: auto; display: block; }
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a {
  font-size: 15px; color: var(--muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  border-radius: 4px;
  transition: all 0.2s !important;
}
.nav-cta:hover { background: var(--accent); color: #fff !important; }

/* === HERO === */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden;
  padding: 120px 24px 80px;
  background-color: #c8bfb4;
  background-image: url('west building.png');
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: scroll;
  -webkit-transform: translateZ(0);
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(255, 255, 255, 0.68);
  z-index: 0;
  pointer-events: none;
}
.hero-grid { display: none; }
.hero-content {
  position: relative; z-index: 1;
  max-width: 1160px; margin: 0 auto; width: 100%;
  text-align: center;
}
.hero-btns { position: relative; z-index: 1; }
.hero-tag {
  font-family: var(--font-mono);
  font-size: 13px; font-weight: 700; color: var(--accent);
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 24px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.18);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(72px, 13vw, 160px);
  font-weight: 700; line-height: 0.9;
  letter-spacing: -6px;
  color: var(--text);
  margin-bottom: 24px;
}
.hero-sub {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 300; color: var(--muted);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
  text-shadow: 0 0 16px rgba(255,255,255,1), 0 0 32px rgba(255,255,255,1);
}
.hero-desc {
  font-size: 17px; color: var(--muted);
  max-width: 520px; margin: 0 auto 40px;
  text-shadow: 0 0 12px rgba(255,255,255,1), 0 0 24px rgba(255,255,255,1);
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

/* === BUTTONS === */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-family: var(--font-body);
  font-size: 15px; font-weight: 500;
  border-radius: 4px;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #1e40af; transform: translateY(-1px); }
.btn-ghost { border: 1px solid rgba(0,0,0,0.2); color: var(--text); background: rgba(255,255,255,0.85); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: rgba(255,255,255,0.95); }
.btn-outline { border: 1px solid var(--border); color: var(--muted); padding: 10px 22px; background: transparent; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }


/* === SECTIONS === */
.section { padding: 100px 0; }
.section-alt { background: var(--surface); }

.section-header { margin-bottom: 60px; }
.section-tag {
  font-family: var(--font-mono);
  font-size: 12px; color: var(--accent);
  letter-spacing: 2px; text-transform: uppercase;
  display: block; margin-bottom: 16px;
}
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700; letter-spacing: -2px;
  color: var(--text);
}

/* === ABOUT === */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
  align-items: start;
}
.about-text p { color: var(--muted); margin-bottom: 20px; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.highlight {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.highlight:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(30, 58, 138, 0.08);
}
.hl-icon {
  font-size: 24px; display: block;
  color: var(--accent); margin-bottom: 12px;
  font-family: var(--font-mono);
}
.highlight h3 {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 600;
  margin-bottom: 8px; color: var(--text);
}
.highlight p { font-size: 14px; color: var(--muted); }

/* === SPEAKERS === */
.speakers-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.speaker-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  display: flex; gap: 18px;
  transition: all 0.2s;
}
.speaker-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(30, 58, 138, 0.08);
  background: var(--surface);
}
.speaker-info h3 {
  font-family: var(--font-display);
  font-size: 17px; font-weight: 600;
  margin-bottom: 6px; color: var(--text);
}
.speaker-talk {
  font-size: 14px; color: var(--text);
  font-style: italic; margin-bottom: 10px;
}
.speaker-abstract {
  font-size: 13px; color: var(--muted);
  padding: 10px 12px;
  background: var(--surface);
  border-left: 2px solid var(--accent);
  border-radius: 0 4px 4px 0;
  line-height: 1.6;
}

/* === AGENDA === */
.agenda-days { display: flex; flex-direction: column; gap: 40px; }
.agenda-day {
  border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
  background: var(--surface);
}
.day-header {
  padding: 18px 32px;
  background: var(--accent);
  display: flex; align-items: center; gap: 20px;
}
.day-num {
  font-family: var(--font-mono);
  font-size: 12px; color: rgba(255,255,255,0.7); letter-spacing: 1px;
}
.day-date { font-size: 15px; color: #fff; font-weight: 500; }
.day-events { padding: 4px 0; }
.event {
  display: flex; gap: 24px;
  padding: 14px 32px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.event:last-child { border-bottom: none; }
.event:hover { background: var(--bg); }
.event-time {
  font-family: var(--font-mono);
  font-size: 12px; color: var(--muted);
  min-width: 90px; padding-top: 4px;
  flex-shrink: 0;
}
.event-info h4 { font-size: 15px; font-weight: 500; margin-bottom: 2px; color: var(--text); }
.event-info p { font-size: 13px; color: var(--muted); }
.event-talk { }
.event-break { opacity: 0.65; }
.talk-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--accent); background: var(--accent-light);
  padding: 2px 8px; border-radius: 3px;
  margin-bottom: 4px;
}

/* === VENUE === */
.venue-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: center;
}
.venue-info h3 {
  font-family: var(--font-display);
  font-size: 24px; font-weight: 600;
  margin-bottom: 14px; color: var(--text);
}
.venue-address {
  font-family: var(--font-mono);
  font-size: 14px; color: var(--muted);
  line-height: 1.8; margin-bottom: 20px;
}
.venue-info > p { color: var(--muted); margin-bottom: 28px; }
.venue-links { display: flex; gap: 12px; }
.venue-map-placeholder {
  height: 320px;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  background-image:
    linear-gradient(rgba(30, 58, 138, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 138, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}
.map-inner { text-align: center; }
.map-inner span {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700;
  color: var(--accent);
  display: block; margin-bottom: 8px;
}
.map-inner p { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }

/* === REGISTER === */
.register-section { background: var(--accent); }
.register-inner { text-align: center; max-width: 560px; margin: 0 auto; }
.register-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 700; letter-spacing: -2px;
  color: #fff; margin-bottom: 16px;
}
.register-inner > p { color: rgba(255,255,255,0.75); margin-bottom: 36px; font-size: 17px; }
.register-form {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center;
}
.register-form input {
  flex: 1; min-width: 240px;
  padding: 14px 20px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  background: rgba(255,255,255,0.15);
  color: #fff; font-size: 15px;
  font-family: var(--font-body);
  outline: none;
}
.register-form input::placeholder { color: rgba(255,255,255,0.5); }
.register-form input:focus { border-color: rgba(255,255,255,0.7); background: rgba(255,255,255,0.2); }
.register-section .btn-primary {
  background: #fff; color: var(--accent);
}
.register-section .btn-primary:hover { background: #f0f4ff; }

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .speakers-grid { grid-template-columns: repeat(2, 1fr); }
  .venue-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .hero-title { letter-spacing: -3px; }
  .nav-links li:not(:last-child) { display: none; }
  .about-highlights { grid-template-columns: 1fr; }
  .speakers-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .day-header { padding: 14px 20px; }
  .event { padding: 12px 20px; gap: 16px; }
  .event-time { min-width: 70px; }
}

footer {
  background: #111827;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 32px;
}
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 60px; margin-bottom: 48px;
}
.footer-logo-img {
  height: 36px; width: auto;
  display: block; margin-bottom: 14px;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.45); line-height: 1.6; }
.footer-links h4, .footer-contact h4 {
  font-size: 11px; font-weight: 600;
  color: rgba(255,255,255,0.4); letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 15px; color: rgba(255,255,255,0.5); transition: color 0.2s; }
.footer-links a:hover { color: #fff; }
.footer-contact p { font-size: 14px; color: rgba(255,255,255,0.45); line-height: 1.7; }
.footer-contact a { color: rgba(255,255,255,0.6); transition: color 0.2s; }
.footer-contact a:hover { color: #fff; }