@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-dark: #0a0a0f;
  --bg-gradient: radial-gradient(circle at 50% 0%, #1a1a2e 0%, #0a0a0f 70%);
  --surface: rgba(20, 20, 30, 0.5);
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --gold: #f8c755;
  --gold-glow: rgba(248, 199, 85, 0.2);
  --text: #f0f0f5;
  --muted: #8a8a9e;
  --locked: #2a2a3e;
}

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

body {
  background: var(--bg-dark);
  background-image: var(--bg-gradient);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  min-height: 100vh;
  padding-bottom: 4rem;
}

header {
  text-align: center;
  padding: 4rem 2rem;
  background: radial-gradient(ellipse at 50% 10%, rgba(248,199,85,0.1) 0%, transparent 70%);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

h1 span {
  color: var(--gold);
  background: linear-gradient(135deg, #fff, var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sub {
  color: var(--muted);
  font-size: 1.2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.module-section {
  margin-top: 4rem;
}

.module-title {
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 2rem;
  border-bottom: 2px solid rgba(248,199,85,0.2);
  padding-bottom: 0.5rem;
  display: inline-block;
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.lesson-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Status: Liberada */
.lesson-card.unlocked {
  border-left: 4px solid var(--gold);
}

.lesson-card.unlocked:hover {
  transform: translateY(-5px);
  border-color: var(--gold);
  box-shadow: 0 8px 25px var(--gold-glow);
  background: rgba(248,199,85,0.05);
}

/* Status: Bloqueada */
.lesson-card.locked {
  border-left: 4px solid var(--locked);
  opacity: 0.6;
  cursor: not-allowed;
  filter: grayscale(100%);
}

.lesson-card.locked:hover {
  opacity: 0.8;
}

.lesson-num {
  font-size: 0.9rem;
  color: var(--gold);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
}

.locked .lesson-num {
  color: var(--muted);
}

.lesson-title {
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.4;
  flex-grow: 1;
}

.icon-status {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 1.2rem;
}

.unlocked .icon-status { content: "▶"; color: var(--gold); }
.locked .icon-status { content: "🔒"; color: var(--muted); }