:root {
  --purple: #7c3aed;
  --purple-light: #a78bfa;
  --orange: #f97316;
  --pink: #ec4899;
  --dark: #1e1b4b;
  --white: #ffffff;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', sans-serif;
  background: var(--dark);
  color: var(--white);
  line-height: 1.6;
  min-height: 100vh;
}

.campaign-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: linear-gradient(90deg, var(--purple), var(--pink));
  text-align: center; padding: 10px 16px; font-size: 0.85rem; font-weight: 500;
}
.campaign-bar strong { font-weight: 800; }

.landing { padding-top: 44px; }

.hero {
  min-height: 90vh; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 60px 24px;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(124,58,237,0.3) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 80% 80%, rgba(249,115,22,0.15) 0%, transparent 50%);
}
.hero-content { max-width: 600px; }

.event-tag {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em;
  color: var(--purple-light); margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.8rem); font-weight: 800; line-height: 1.1; margin-bottom: 16px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--orange), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-sub { font-size: 1.05rem; opacity: 0.8; margin-bottom: 36px; }

.countdown {
  display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 36px;
}
.countdown-item {
  background: rgba(255,255,255,0.08); border-radius: 12px; padding: 16px 20px; min-width: 72px;
}
.countdown-item span { display: block; font-size: 2rem; font-weight: 800; }
.countdown-item label { font-size: 0.7rem; opacity: 0.6; }
.countdown-sep { font-size: 1.5rem; font-weight: 700; opacity: 0.3; padding-bottom: 16px; }

.signup-form {
  display: flex; max-width: 440px; margin: 0 auto 12px; gap: 0;
  border-radius: 12px; overflow: hidden; box-shadow: 0 8px 32px rgba(124,58,237,0.3);
}
.signup-form input {
  flex: 1; padding: 16px 20px; border: none; font-family: inherit; font-size: 0.95rem;
  background: rgba(255,255,255,0.95); color: var(--dark);
}
.signup-form input:focus { outline: none; }
.btn-cta {
  padding: 16px 24px; background: linear-gradient(135deg, var(--orange), var(--pink));
  color: var(--white); border: none; font-family: inherit; font-size: 0.95rem; font-weight: 700;
  cursor: pointer; white-space: nowrap; transition: opacity 0.2s; text-decoration: none;
  display: inline-block;
}
.btn-cta:hover { opacity: 0.9; }
.btn-lg { padding: 18px 40px; border-radius: 12px; font-size: 1.05rem; }
.signup-note { font-size: 0.85rem; opacity: 0.6; }
.signup-note strong { color: var(--orange); }

.speakers, .agenda { padding: 60px 24px; max-width: 800px; margin: 0 auto; }
.speakers h2, .agenda h2 { text-align: center; font-size: 1.5rem; margin-bottom: 32px; }

.speaker-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.speaker {
  text-align: center; padding: 28px 16px; background: rgba(255,255,255,0.05);
  border-radius: 16px; border: 1px solid rgba(255,255,255,0.08);
}
.speaker-avatar {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 12px;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; font-weight: 700;
}
.speaker h3 { font-size: 0.95rem; margin-bottom: 6px; }
.speaker p { font-size: 0.8rem; opacity: 0.6; }

.agenda-list { display: flex; flex-direction: column; gap: 0; }
.agenda-item {
  display: flex; gap: 20px; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.agenda-item time { font-size: 0.9rem; font-weight: 700; color: var(--purple-light); min-width: 56px; }
.agenda-item h4 { font-size: 0.95rem; margin-bottom: 4px; }
.agenda-item p { font-size: 0.85rem; opacity: 0.6; }

.cta-bottom {
  text-align: center; padding: 80px 24px;
  background: linear-gradient(to top, rgba(124,58,237,0.15), transparent);
}
.cta-bottom h2 { font-size: 1.75rem; margin-bottom: 12px; }
.cta-bottom > p { opacity: 0.7; margin-bottom: 28px; }
.cta-links { margin-top: 24px; display: flex; justify-content: center; gap: 24px; }
.cta-links a { color: var(--purple-light); text-decoration: none; font-size: 0.9rem; }
.cta-links a:hover { text-decoration: underline; }

.footer { text-align: center; padding: 24px; font-size: 0.8rem; opacity: 0.5; }

.countdown-item label { font-size: 0.7rem; opacity: 0.6; }
.countdown-item .cd-label { display: block; font-size: 0.7rem; opacity: 0.6; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.success-modal {
  position: fixed; inset: 0; z-index: 200; display: flex;
  align-items: center; justify-content: center;
  background: rgba(0,0,0,0.7); transition: opacity 0.3s;
}
.success-modal.hidden { opacity: 0; pointer-events: none; }
.modal-backdrop { position: absolute; inset: 0; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }
.modal-content {
  background: var(--white); color: var(--dark); border-radius: 20px;
  padding: 40px; text-align: center; max-width: 360px;
}
.modal-icon {
  display: flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--purple), var(--pink)); color: var(--white);
  font-size: 1.5rem; font-weight: 700;
}
.modal-content h3 { font-size: 1.25rem; margin-bottom: 8px; }
.modal-content p { font-size: 0.9rem; color: #666; margin-bottom: 20px; }
.modal-content button {
  padding: 12px 32px; background: var(--purple); color: var(--white);
  border: none; border-radius: 8px; font-family: inherit; font-size: 0.95rem;
  cursor: pointer;
}

@media (max-width: 640px) {
  .speaker-grid { grid-template-columns: 1fr; }
  .signup-form { flex-direction: column; border-radius: 12px; }
  .countdown-item { min-width: 56px; padding: 12px 14px; }
  .countdown-item span { font-size: 1.5rem; }
  .cta-links { flex-direction: column; gap: 12px; }
}