:root {
    /* Variáveis do Tema Claro (Padrão) */
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #dee2e6;
    --navbar-bg: #343a40;
    --navbar-text: #ffffff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --transition-speed: 0.3s;
}

/* Variáveis do Tema Escuro */
[data-theme="dark"] {
    --primary-color: #375a7f;
    --bg-color: #1a1a1a;
    --card-bg: #2c2c2c;
    --text-color: #e0e0e0;
    --text-muted: #aaaaaa;
    --border-color: #444444;
    --navbar-bg: #000000;
    --navbar-text: #e0e0e0;
    --shadow: 0 4px 6px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

a { color: var(--primary-color); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Navbar Responsiva --- */
.navbar {
    background-color: var(--navbar-bg);
    color: var(--navbar-text);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.brand {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand img { height: 40px; } /* Ajuste o tamanho do logo aqui */

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info { font-size: 0.9rem; }
.user-info small { color: #ccc; display: block; font-size: 0.75rem; }

.btn-theme {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.3);
    color: var(--navbar-text);
    padding: 5px 10px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1.2rem;
}

.btn-logout {
    color: #ff6b6b;
    font-weight: bold;
}

/* --- Layout Geral --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

h1, h2, h3 { margin-top: 0; }

/* --- Cards (Estatísticas e Info) --- */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card h3 { font-size: 1rem; color: var(--text-muted); margin-bottom: 5px; }
.card .value { font-size: 2rem; font-weight: bold; color: var(--primary-color); }
.card .icon { font-size: 2.5rem; opacity: 0.2; position: absolute; right: 20px; top: 20px; }
.card-relative { position: relative; }

/* --- Tabelas Responsivas --- */
.table-responsive {
    overflow-x: auto;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px; /* Garante que a tabela não esmague em mobile */
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: rgba(0,0,0,0.05);
    font-weight: 600;
}

tr:hover { background-color: rgba(0,0,0,0.02); }

/* --- Elementos de Áudio --- */
.audio-player-wrapper audio {
    width: 100%;
    height: 40px;
    border-radius: 20px;
}

.badge {
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    color: white;
}
.badge-new { background-color: var(--success-color); }
.badge-info { background-color: var(--primary-color); }

/* --- Filtros --- */
.search-box {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.form-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-group { flex: 1; min-width: 200px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 500; }
.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.2s;
}
.btn-primary { background-color: var(--primary-color); color: white; }
.btn:hover { opacity: 0.9; }

/* --- Responsividade (Mobile) --- */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .nav-controls {
        width: 100%;
        justify-content: space-between;
    }

    .form-group { width: 100%; }
    
    .card .icon { font-size: 2rem; }
}