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

body {
  font-family: 'Segoe UI', sans-serif;
  color: #1a1a2e;
  line-height: 1.6;
}

/* NAV */
nav {
  position: sticky; top: 0;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  z-index: 100;
}
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 1rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { font-size: 1.3rem; font-weight: 700; color: #4a00e0; }
nav ul { list-style: none; display: flex; gap: 1.5rem; }
nav a { text-decoration: none; color: #333; font-weight: 500; }
nav a:hover { color: #4a00e0; }
.btn-nav {
  background: #4a00e0; color: #fff !important;
  padding: 0.5rem 1.2rem; border-radius: 6px;
}

/* HERO */
.hero {
  background: linear-gradient(135deg, #4a00e0 0%, #8e2de2 100%);
  color: white;
  text-align: center;
  padding: 5rem 2rem;
  min-height: 90vh;
  display: flex; align-items: center; justify-content: center;
}
.tag {
  background: rgba(255,255,255,0.15);
  display: inline-block;
  padding: 0.3rem 1rem; border-radius: 20px;
  font-size: 0.9rem; margin-bottom: 1rem;
}
.hero h1 { font-size: 3.5rem; font-weight: 800; margin-bottom: 0.5rem; }
.subtitle { font-size: 1.3rem; opacity: 0.9; margin-bottom: 2.5rem; }

/* COUNTDOWN */
.countdown {
  display: flex; gap: 1rem; justify-content: center;
  margin-bottom: 2.5rem; flex-wrap: wrap;
}
.cd-block {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  min-width: 90px;
  text-align: center;
}
.cd-block span {
  display: block; font-size: 2.8rem; font-weight: 800; line-height: 1;
}
.cd-block small { font-size: 0.75rem; opacity: 0.8; text-transform: uppercase; }
.btn-hero {
  display: inline-block;
  background: #fff; color: #4a00e0;
  font-weight: 700; font-size: 1.1rem;
  padding: 1rem 2.5rem; border-radius: 8px;
  text-decoration: none;
  transition: transform 0.2s;
}
.btn-hero:hover { transform: translateY(-2px); }

/* SECTIONS */
.section { padding: 5rem 2rem; }
.bg-light { background: #f8f7ff; }
.container { max-width: 1100px; margin: 0 auto; }
.section h2 {
  font-size: 2rem; font-weight: 700;
  margin-bottom: 2rem; color: #4a00e0;
}

/* STATS */
.stats {
  display: flex; gap: 2rem; flex-wrap: wrap;
  margin-top: 2rem;
}
.stat {
  text-align: center; flex: 1; min-width: 120px;
  background: #fff; border-radius: 12px;
  padding: 1.5rem; box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.stat strong { display: block; font-size: 2rem; color: #4a00e0; }

/* SCHEDULE TABS */
.tabs { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.tab {
  padding: 0.6rem 1.2rem; border: 2px solid #4a00e0;
  background: transparent; color: #4a00e0;
  border-radius: 6px; cursor: pointer; font-weight: 600;
  transition: all 0.2s;
}
.tab.active { background: #4a00e0; color: #fff; }
.sched-item {
  display: flex; gap: 1.5rem; align-items: flex-start;
  padding: 1rem; border-left: 3px solid #4a00e0;
  margin-bottom: 1rem; background: #fff; border-radius: 0 8px 8px 0;
  box-shadow: 0 1px 6px rgba(0,0,0,0.05);
}
.time {
  font-weight: 700; color: #4a00e0;
  min-width: 55px; font-size: 0.9rem;
}
.sched-item p { color: #666; font-size: 0.9rem; margin-top: 0.2rem; }

/* SPEAKERS */
.speakers-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}
.speaker-card {
  background: #fff; border-radius: 16px;
  padding: 2rem; text-align: center;
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
  transition: transform 0.2s;
}
.speaker-card:hover { transform: translateY(-4px); }
.avatar {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, #4a00e0, #8e2de2);
  color: white; font-weight: 700; font-size: 1.3rem;
  border-radius: 50%; display: flex; align-items: center;
  justify-content: center; margin: 0 auto 1rem;
}
.speaker-card h3 { font-size: 1rem; margin-bottom: 0.3rem; }
.speaker-card p { color: #888; font-size: 0.85rem; }

/* VENUE */
.venue-info {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2rem;
  align-items: center;
}
.venue-info p { margin-bottom: 0.6rem; }
.map-placeholder {
  background: linear-gradient(135deg, #e8e0ff, #d4c5ff);
  border-radius: 16px; height: 220px;
  display: flex; align-items: center; justify-content: center;
  text-align: center; font-size: 1.5rem; color: #4a00e0;
}

/* REGISTER FORM */
.reg-form {
  background: #fff; border-radius: 16px;
  padding: 2.5rem; box-shadow: 0 2px 24px rgba(0,0,0,0.08);
  max-width: 700px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.9rem; }
.form-group input, .form-group select {
  width: 100%; padding: 0.7rem 1rem;
  border: 2px solid #e0e0e0; border-radius: 8px;
  font-size: 1rem; transition: border 0.2s;
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: #4a00e0;
}
.btn-submit {
  background: #4a00e0; color: #fff;
  border: none; border-radius: 8px;
  padding: 0.9rem 2rem; font-size: 1rem;
  font-weight: 700; cursor: pointer;
  transition: background 0.2s;
}
.btn-submit:hover { background: #3600b0; }
.success-msg {
  margin-top: 1.5rem; padding: 1rem 1.5rem;
  background: #e6ffed; color: #176337;
  border-radius: 8px; font-weight: 600;
}

/* FAQ */
.faq { max-width: 700px; }
.faq-item { border-bottom: 1px solid #e0e0e0; }
.faq-q {
  width: 100%; text-align: left; background: none;
  border: none; padding: 1rem 0;
  font-size: 1rem; font-weight: 600;
  cursor: pointer; display: flex; justify-content: space-between;
}
.faq-q span { font-size: 1.4rem; color: #4a00e0; transition: transform 0.2s; }
.faq-a { display: none; padding: 0 0 1rem; color: #555; }
.faq-a.open { display: block; }

/* FOOTER */
footer {
  background: #1a1a2e; color: #aaa;
  text-align: center; padding: 2rem;
}
footer a { color: #8e2de2; }

@media (max-width: 600px) {
  .hero h1 { font-size: 2.2rem; }
  .form-row { grid-template-columns: 1fr; }
  .venue-info { grid-template-columns: 1fr; }
  nav ul { display: none; }
}