:root {
    --bg-main: #0b132b;
    --bg-card: #1c2541;
    --bg-input: #0b132b;
    --accent-cyan: #00f5d4;
    --accent-yellow: #ffee32;
    --text-light: #ffffff;
    --text-muted: #a0aec0;
    --border-color: rgba(255, 255, 255, 0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: var(--bg-main); color: var(--text-light); padding: 20px; display: flex; flex-direction: column; align-items: center; min-height: 100vh; }
.header { text-align: center; margin-bottom: 20px; }
.header h1 { color: var(--accent-cyan); font-size: 2.2rem; margin-bottom: 5px; }
.header p { color: var(--text-muted); font-size: 0.95rem; }

/* Menu de Abas Superiores */
.nav-categorias { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; max-width: 1100px; margin-bottom: 20px; }
.btn-cat { background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-light); padding: 10px 16px; border-radius: 8px; font-weight: bold; cursor: pointer; transition: all 0.2s; }
.btn-cat:hover { border-color: var(--accent-cyan); }
.btn-cat.active { background: transparent; border: 2px solid var(--accent-cyan); color: var(--accent-cyan); box-shadow: 0 0 10px rgba(0,245,212,0.3); }

/* Select de Temática */
.tematica-container { background: var(--bg-card); border: 1px solid var(--border-color); width: 100%; max-width: 1000px; padding: 12px 20px; border-radius: 8px; display: flex; align-items: center; gap: 15px; margin-bottom: 20px; }
.tematica-container label { color: var(--accent-cyan); font-weight: bold; font-size: 0.9rem; }
.tematica-container select { flex: 1; background: var(--bg-input); color: #fff; border: 1px solid var(--border-color); padding: 10px; border-radius: 6px; font-size: 1rem; cursor: pointer; }

/* Menus do Módulo (Laboratório, Jogo, etc) */
.nav-modulos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; width: 100%; max-width: 1000px; margin-bottom: 20px; }
.btn-mod { background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-muted); padding: 12px; border-radius: 8px; font-weight: bold; cursor: pointer; text-align: center; display: flex; align-items: center; justify-content: center; gap: 8px; }
.btn-mod.active { background: var(--accent-cyan); color: #0b132b; font-weight: 800; border-color: var(--accent-cyan); }

/* Conteúdo Dinâmico */
.content-area { width: 100%; max-width: 1000px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 10px; padding: 25px; min-height: 400px; }