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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #1a1a2e;
  background: #f8f9fc;
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Hero === */
.hero {
  padding: 100px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, #eef1f8 0%, #f8f9fc 100%);
}

.hero-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #4a6cf7;
  background: rgba(74, 108, 247, 0.08);
  border: 1px solid rgba(74, 108, 247, 0.15);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: #111;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 500;
  color: #3a3a5c;
  line-height: 1.5;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1rem;
  color: #6b7094;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* === Button === */
.btn-primary {
  display: inline-block;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: #1a1a2e;
  border: none;
  padding: 14px 32px;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}

.btn-primary:hover {
  background: #2d2d52;
  transform: translateY(-1px);
}

.hero-hint {
  margin-top: 14px;
  font-size: 14px;
  color: #6b7094;
}

/* === Mockup === */
.mockup {
  padding: 40px 0 80px;
}

.mockup-window {
  max-width: 680px;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
  box-shadow:
    0 2px 4px rgba(0,0,0,0.04),
    0 8px 24px rgba(0,0,0,0.07),
    0 24px 48px rgba(0,0,0,0.05);
  background: #fff;
}

.mockup-toolbar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 18px;
  background: #f0f1f5;
  border-bottom: 1px solid #e4e6ed;
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.mockup-url {
  margin-left: 14px;
  font-size: 12.5px;
  color: #888;
  font-weight: 500;
  background: #fff;
  padding: 4px 14px;
  border-radius: 6px;
  border: 1px solid #e4e6ed;
}

.mockup-content {
  padding: 0;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid #f0f1f5;
}

.mockup-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4a6cf7, #6b8cff);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mockup-channel-name {
  font-size: 15px;
  font-weight: 600;
  color: #1a1a2e;
}

.mockup-channel-meta {
  font-size: 12.5px;
  color: #999;
  margin-top: 1px;
}

.mockup-live-badge {
  margin-left: auto;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  background: #e53e3e;
  padding: 4px 10px;
  border-radius: 6px;
  animation: livePulse 2s ease-in-out infinite;
}

@keyframes livePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.mockup-messages {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.msg {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.msg-time {
  font-size: 12px;
  color: #b0b4c8;
  min-width: 38px;
  padding-top: 6px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.msg-bubble {
  background: #f4f5fa;
  border-radius: 10px;
  padding: 10px 14px;
  max-width: 480px;
}

.msg-author {
  font-size: 13px;
  font-weight: 600;
  color: #4a6cf7;
  margin-bottom: 3px;
}

.msg-text {
  font-size: 14px;
  color: #2c2c44;
  line-height: 1.5;
}

.msg-recent .msg-bubble {
  background: #eef0ff;
  border: 1px solid rgba(74, 108, 247, 0.12);
}

/* === Features === */
.features {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: #111;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: #fff;
  border: 1px solid #ebedf5;
  border-radius: 14px;
  padding: 28px 24px;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.feature-card:hover {
  border-color: #d0d4e4;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #f0f2ff;
  color: #4a6cf7;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: #6b7094;
  line-height: 1.6;
}

/* === Coming Soon === */
.coming-soon {
  padding: 40px 0 100px;
}

.coming-soon-card {
  text-align: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #2d2d52 100%);
  border-radius: 18px;
  padding: 56px 32px;
  color: #fff;
}

.coming-soon-card h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.coming-soon-card p {
  font-size: 15px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 28px;
}

.coming-soon-card .btn-primary {
  background: #fff;
  color: #1a1a2e;
}

/* === Footer === */
.footer {
  padding: 32px 0;
  border-top: 1px solid #ebedf5;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-size: 15px;
  font-weight: 600;
  color: #1a1a2e;
}

.footer-copy {
  font-size: 13px;
  color: #999;
}

/* === Responsive === */
@media (max-width: 640px) {
  .hero {
    padding: 72px 0 48px;
  }

  .hero-subtitle br {
    display: none;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .mockup-window {
    border-radius: 10px;
  }

  .coming-soon-card {
    padding: 40px 24px;
  }

  .footer .container {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}