:root {
  --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --card-bg: #1f2937;
  --card-border: rgba(255,255,255,0.1);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-gradient: linear-gradient(90deg, #06b6d4, #8b5cf6);
  --btn-gradient: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
  --input-bg: #111827;
  --input-border: rgba(255,255,255,0.15);
  color-scheme: dark;
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
  color: var(--text-primary);
  padding: 40px 20px;
}

.landing-container {
  max-width: 700px;
  margin: 0 auto;
}

.hero {
  text-align: center;
  margin-bottom: 40px;
  padding-top: 40px;
}

.hero h1 {
  font-size: 42px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  line-height: 1.1;
}

.subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 540px;
  margin: 0 auto;
}

.create-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 32px;
  margin-bottom: 48px;
  box-shadow: 0 0 60px rgba(6, 182, 212, 0.1), 0 8px 32px rgba(0,0,0,0.4);
}

.create-card h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.form-row {
  display: flex;
  gap: 10px;
}

.form-row input {
  flex: 1;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 16px;
  outline: none;
  transition: all 0.2s;
}

.form-row input:focus {
  border-color: #06b6d4;
  box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
}

.form-row input::placeholder {
  color: var(--text-muted);
}

.create-btn {
  padding: 14px 28px;
  border-radius: 12px;
  border: none;
  background: var(--btn-gradient);
  color: white;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.create-btn:hover {
  filter: brightness(1.1);
  transform: scale(1.02);
}

.create-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.msg {
  margin-top: 10px;
  font-size: 14px;
}

.features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 48px;
}

.feature {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 10px;
}

.feature h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.how-it-works {
  text-align: center;
  margin-bottom: 40px;
}

.how-it-works h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.steps {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--btn-gradient);
  color: white;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.step-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.step-arrow {
  font-size: 20px;
  color: var(--text-muted);
}

@media (max-width: 600px) {
  .hero h1 { font-size: 32px; }
  .subtitle { font-size: 16px; }
  .features { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .create-btn { width: 100%; }
  .steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
}