/* Solar System Lab — main styles */
[hidden] { display: none !important; }

.ssl-container { max-width: 1280px; padding-top: 40px; }

.back-link { display: inline-block; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 24px; transition: color 0.2s ease; }
.back-link:hover { color: var(--accent); }

.ssl-hero { margin-bottom: 24px; }
.ssl-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.ssl-hero .tagline { font-size: 0.95rem; }

/* Stage */
.ssl-stage {
  position: relative; aspect-ratio: 16 / 9; min-height: 420px;
  background: #09121A; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 16px;
}
.ssl-canvas { display: block; width: 100%; height: 100%; cursor: pointer; touch-action: manipulation; }
.ssl-loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--text-muted); margin: 0; }
.ssl-stage-meta {
  position: absolute; bottom: 12px; right: 14px;
  background: rgba(0,0,0,0.55); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; color: var(--text);
}

/* Controls */
.ssl-controls {
  display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 16px; margin-bottom: 16px;
}
.ssl-pill {
  background: var(--bg); color: var(--text-muted);
  border: 1px solid var(--border); padding: 7px 14px;
  font: inherit; font-size: 0.82rem; font-weight: 600;
  cursor: pointer; border-radius: 6px;
  transition: all 0.15s ease;
}
.ssl-pill:hover { color: var(--text); border-color: var(--accent); }
.ssl-pill.is-on { color: var(--accent); border-color: var(--accent); background: var(--accent-glow); }

.ssl-slider {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; color: var(--text-muted);
}
.ssl-slider strong { color: var(--text); font-family: 'JetBrains Mono', monospace; min-width: 36px; display: inline-block; }
.ssl-slider input[type="range"] { width: 120px; accent-color: var(--accent); }

.ssl-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.82rem; color: var(--text-muted); cursor: pointer;
}
.ssl-toggle input { accent-color: var(--accent); }

/* Grid layout for cards */
.ssl-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px; margin-bottom: 16px;
}
.ssl-card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
  display: flex; flex-direction: column; gap: 10px;
}
.ssl-card-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.ssl-section-tag { font-family: 'JetBrains Mono', monospace; font-size: 0.7rem; font-weight: 700; color: var(--accent); letter-spacing: 0.08em; }
.ssl-progress { font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; color: var(--text-muted); }
.ssl-card h3 { margin: 0; font-size: 1rem; font-weight: 700; }

/* Planet picker */
.ssl-planet-picker { display: flex; flex-wrap: wrap; gap: 6px; }
.ssl-planet-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg); color: var(--text-muted);
  border: 1px solid var(--border); padding: 5px 10px;
  font: inherit; font-size: 0.78rem; cursor: pointer;
  border-radius: 999px; transition: all 0.15s ease;
}
.ssl-planet-pill:hover { color: var(--text); border-color: var(--c); }
.ssl-planet-pill.is-on { color: var(--c); border-color: var(--c); background: color-mix(in srgb, var(--c) 12%, transparent); }
.ssl-planet-pill-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c); display: inline-block; }

.ssl-planet-info { display: flex; flex-direction: column; gap: 8px; }
.ssl-planet-desc { color: var(--text-muted); font-size: 0.88rem; margin: 0; line-height: 1.5; }
.ssl-planet-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px 12px; font-size: 0.82rem; }
.ssl-stat { display: flex; justify-content: space-between; gap: 8px; padding: 3px 0; }
.ssl-stat span { color: var(--text-muted); }
.ssl-stat strong { font-family: 'JetBrains Mono', monospace; font-weight: 600; }
.ssl-planet-hint {
  background: var(--bg); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  padding: 8px 12px; border-radius: 6px; font-size: 0.85rem; color: var(--text); margin: 0;
}

/* Lesson */
.ssl-lesson-objective { font-size: 0.88rem; margin: 0; }
.ssl-lesson-card p { margin: 0 0 6px; font-size: 0.88rem; line-height: 1.55; }
.ssl-lesson-hint { color: var(--text-muted); font-size: 0.82rem; }
.ssl-lesson-actions { display: flex; gap: 8px; margin-top: auto; padding-top: 8px; }
.ssl-lesson-actions button { flex: 1; }

/* Quiz */
.ssl-quiz-item { margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px dashed var(--border); }
.ssl-quiz-item:last-of-type { border-bottom: none; padding-bottom: 0; margin-bottom: 0; }
.ssl-quiz-q { font-size: 0.88rem; font-weight: 600; margin-bottom: 8px; }
.ssl-quiz-choices { display: flex; flex-direction: column; gap: 4px; }
.ssl-quiz-choice {
  text-align: left; padding: 7px 11px; font: inherit; font-size: 0.85rem;
  background: var(--bg); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; cursor: pointer; transition: all 0.12s ease;
}
.ssl-quiz-choice:hover:not(:disabled) { border-color: var(--accent); }
.ssl-quiz-choice.is-on { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }
.ssl-quiz-choice.is-correct { background: rgba(74,222,128,0.16); border-color: var(--success); color: var(--success); }
.ssl-quiz-choice.is-wrong { background: rgba(248,113,113,0.16); border-color: var(--danger); color: var(--danger); }
.ssl-quiz-explain { font-size: 0.8rem; margin: 6px 0 0; padding: 6px 10px; border-radius: 6px; }
.ssl-quiz-explain.is-correct { background: rgba(74,222,128,0.08); color: var(--success); }
.ssl-quiz-explain.is-wrong { background: rgba(248,113,113,0.08); color: var(--danger); }
.ssl-quiz-actions { display: flex; gap: 8px; margin-top: 8px; }
.ssl-quiz-result {
  background: var(--accent-glow); border: 1px solid var(--accent); color: var(--accent);
  padding: 10px; border-radius: 6px; text-align: center; font-weight: 700; margin-top: 8px;
}

.ssl-btn-primary, .ssl-btn-ghost {
  font: inherit; font-weight: 600; font-size: 0.88rem;
  padding: 8px 14px; border-radius: 6px; cursor: pointer;
  transition: all 0.15s ease; border: 1px solid transparent;
}
.ssl-btn-primary { background: var(--accent); color: #0b0d12; border-color: var(--accent); }
.ssl-btn-primary:hover:not(:disabled) { transform: translateY(-1px); }
.ssl-btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.ssl-btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.ssl-btn-ghost:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.ssl-btn-ghost:disabled { opacity: 0.4; cursor: not-allowed; }