:root {
  --bg: #0f1220;
  --panel: #171b2e;
  --accent: #6c5ce7;
  --accent-2: #00cec9;
  --text: #eef0f7;
  --muted: #9aa0b4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--panel);
  border-bottom: 1px solid #2a2f45;
}

.navbar .brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.navbar nav a {
  color: var(--accent-2);
  text-decoration: none;
  margin-left: 1rem;
}

.navbar .welcome {
  color: var(--muted);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem;
}

.hero {
  text-align: center;
  padding: 3rem 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 12px;
  margin-bottom: 2rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2.5rem;
}

.hero .tagline {
  font-size: 1.1rem;
  margin: 0.25rem 0;
}

.hero .details {
  font-weight: 600;
  margin: 0.5rem 0;
}

.hero .description {
  max-width: 640px;
  margin: 1rem auto 0;
  color: #f0f0ff;
}

.hero .cta {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.5rem;
  background: var(--bg);
  color: var(--text);
  border-radius: 8px;
  text-decoration: none;
}

.hero .badge {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.4rem 1rem;
  background: rgba(0,0,0,0.25);
  border-radius: 8px;
}

.block {
  background: var(--panel);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid #2a2f45;
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.speaker-card {
  background: #1f2440;
  border-radius: 10px;
  padding: 1rem;
}

.speaker-title {
  color: var(--accent-2);
  font-size: 0.9rem;
}

.speaker-bio {
  color: var(--muted);
  font-size: 0.9rem;
}

.api-link {
  margin-top: 1rem;
  font-size: 0.85rem;
}

.api-link a {
  color: var(--accent-2);
}

.login-box {
  max-width: 360px;
  margin: 2rem auto;
  background: var(--panel);
  padding: 2rem;
  border-radius: 12px;
}

.login-box h2 {
  margin-top: 0;
}

.login-box form {
  display: flex;
  flex-direction: column;
}

.login-box label {
  margin-top: 1rem;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.login-box input {
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid #2a2f45;
  background: #0f1220;
  color: var(--text);
}

.login-box button {
  margin-top: 1.5rem;
  padding: 0.7rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

.login-box .error {
  color: #ff7675;
}

.login-box .hint {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}