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

/* Base */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  background: #000;
  color: #fff;
  line-height: 1.5;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 48px;
}

.logo {
  font-size: 28px;
  font-weight: 700;
}

.logo span {
  color: #e62b1e;
}

nav a {
  margin-left: 24px;
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  opacity: 0.85;
}

nav a:hover {
  opacity: 1;
}

/* Hero */
.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 24px;
}

.hero h1 {
  font-size: clamp(42px, 6vw, 80px);
  font-weight: 800;
  margin-bottom: 16px;
}

.hero p {
  max-width: 600px;
  font-size: 18px;
  opacity: 0.85;
  margin-bottom: 32px;
}

.hero button {
  background: #e62b1e;
  color: #fff;
  border: none;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 999px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hero button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(230, 43, 30, 0.4);
}

/* Talks */
.talks {
  padding: 80px 48px;
}

.talks h2 {
  font-size: 36px;
  margin-bottom: 40px;
}

.talk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.talk-card {
  background: #111;
  border-radius: 16px;
  padding: 16px;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.talk-card:hover {
  transform: translateY(-6px);
  background: #151515;
}

.thumbnail {
  width: 100%;
  height: 140px;
  background: linear-gradient(135deg, #333, #111);
  border-radius: 12px;
  margin-bottom: 16px;
}

.talk-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.talk-card p {
  font-size: 14px;
  opacity: 0.7;
}

/* Footer */
footer {
  text-align: center;
  padding: 32px;
  font-size: 14px;
  opacity: 0.6;
}