/* FlameSpark.xyz - Flame + Spark Theme */
:root {
  --flame-orange: #ff6b35;
  --flame-red: #e63946;
  --flame-yellow: #ffc857;
  --flame-dark: #1a1a2e;
  --flame-darker: #0f0f1a;
  --bg-card: rgba(255, 107, 53, 0.08);
  --text-primary: #fff;
  --text-muted: #a0a0a0;
  --success: #2ecc71;
  --error: #e74c3c;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(255, 107, 53, 0.15);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Nunito', 'Segoe UI', system-ui, sans-serif;
  background: linear-gradient(135deg, var(--flame-darker) 0%, var(--flame-dark) 50%, #16213e 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,107,53,0.2);
}
.logo { font-size: 1.5rem; font-weight: 800; color: var(--flame-yellow); }
.logo span { color: var(--flame-orange); }
nav { display: flex; gap: 1.5rem; align-items: center; }
nav a { color: var(--text-muted); text-decoration: none; font-weight: 600; transition: color 0.2s; }
nav a:hover { color: var(--flame-yellow); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--flame-orange), var(--flame-red));
  color: white;
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
}
.btn-primary:hover { box-shadow: 0 6px 25px rgba(255, 107, 53, 0.5); }
.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: var(--flame-yellow);
  border: 2px solid rgba(255,200,87,0.4);
}
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--flame-yellow); }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(255,107,53,0.2);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.subject-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: inherit;
}
.subject-card .icon { font-size: 2.5rem; }
.subject-card h3 { color: var(--flame-yellow); margin-bottom: 0.25rem; }
.subject-card p { color: var(--text-muted); font-size: 0.9rem; }

/* Dashboard stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat { text-align: center; padding: 1rem; background: rgba(255,107,53,0.15); border-radius: var(--radius); }
.stat-value { font-size: 1.75rem; font-weight: 800; color: var(--flame-yellow); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* Forms */
input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 2px solid rgba(255,107,53,0.3);
  background: rgba(0,0,0,0.3);
  color: white;
  font-size: 1rem;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--flame-orange);
  box-shadow: 0 0 0 3px rgba(255,107,53,0.2);
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-weight: 600; color: var(--text-muted); }

/* Lesson / Questions */
.question-card {
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid var(--flame-orange);
}
.question-card.correct { border-left-color: var(--success); }
.question-card.incorrect { border-left-color: var(--error); }
.options { display: flex; flex-direction: column; gap: 0.5rem; }
.option {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.option:hover { background: rgba(255,107,53,0.2); border-color: rgba(255,107,53,0.4); }
.option.selected { border-color: var(--flame-orange); background: rgba(255,107,53,0.2); }
.option.correct { border-color: var(--success); background: rgba(46,204,113,0.2); }
.option.incorrect { border-color: var(--error); background: rgba(231,76,60,0.2); }
.feedback { margin-top: 1rem; padding: 1rem; border-radius: 8px; font-size: 0.95rem; }
.feedback.correct { background: rgba(46,204,113,0.2); color: #2ecc71; }
.feedback.incorrect { background: rgba(231,76,60,0.2); color: #e74c3c; }

/* Progress bar */
.progress-bar {
  height: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--flame-orange), var(--flame-yellow));
  border-radius: 4px;
  transition: width 0.3s;
}

/* Badges */
.badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.4rem 0.8rem; background: rgba(255,200,87,0.2); border-radius: 999px; font-size: 0.85rem; margin: 0.25rem; }
.badges-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* Level labels */
.level-spark { color: #ffc857; }
.level-flame { color: #ff6b35; }
.level-blaze { color: #e63946; }
.level-inferno { color: #ff1744; text-shadow: 0 0 10px rgba(255,23,68,0.5); }

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 2rem;
}
.hero h1 { font-size: 3rem; margin-bottom: 1rem; background: linear-gradient(135deg, var(--flame-yellow), var(--flame-orange)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.25rem; color: var(--text-muted); max-width: 500px; margin: 0 auto 2rem; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  nav { gap: 0.75rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}