:root {
    --bg-dark: #0f172a;
    --bg-panel: #1e293b;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --danger: #ef4444;
    --success: #22c55e;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', sans-serif; }

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    padding-bottom: 120px; /* Espaço para o player */
}

/* Utils */
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
.btn {
    padding: 10px 20px; border: none; border-radius: 8px; cursor: pointer;
    font-weight: 600; transition: 0.3s; text-decoration: none; display: inline-block;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); }
.btn-danger { background: var(--danger); color: white; }
.input-field {
    width: 100%; padding: 12px; margin: 10px 0;
    background: var(--bg-panel); border: 1px solid #334155;
    color: white; border-radius: 8px;
}


/* Alertas */
.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid var(--success);
    color: var(--success);
}
.alert-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--danger);
    color: var(--danger);
}

/* Landing Page */
.hero {
    height: 100vh; display: flex; flex-direction: column;
    justify-content: center; align-items: center; text-align: center;
    background: radial-gradient(circle at center, #1e1b4b 0%, #0f172a 100%);
}
.hero h1 { font-size: 3.5rem; margin-bottom: 20px; background: linear-gradient(to right, #818cf8, #c084fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

/* Dashboard Grid */
.grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px;
}
.card {
    background: var(--bg-panel); padding: 20px; border-radius: 16px;
    box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,0.05);
    transition: 0.3s; position: relative;
}
.card:hover { transform: translateY(-5px); border-color: var(--primary); }
.card-tag {
    position: absolute; top: 15px; right: 15px;
    padding: 4px 10px; border-radius: 20px; font-size: 0.7rem; font-weight: bold;
    text-transform: uppercase;
}
.tag-loop { background: rgba(99, 102, 241, 0.2); color: #818cf8; }
.tag-playback { background: rgba(34, 197, 94, 0.2); color: #4ade80; }

/* Player Bar */
.player-bar {
    position: fixed; bottom: 0; left: 0; width: 100%;
    background: rgba(30, 41, 59, 0.95); backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255,255,255,0.1); padding: 15px 30px;
    display: flex; align-items: center; justify-content: space-between;
    z-index: 1000;
}
.player-controls { display: flex; align-items: center; gap: 20px; }
.control-btn {
    background: none; border: none; color: white; font-size: 1.5rem; cursor: pointer;
}
.control-btn:hover { color: var(--primary); }
.slider-group { display: flex; flex-direction: column; width: 150px; }
.slider-group label { font-size: 0.7rem; color: var(--text-muted); }
input[type=range] { width: 100%; cursor: pointer; }

/* Forms */
.auth-box {
    background: var(--bg-panel); padding: 40px; border-radius: 16px;
    width: 100%; max-width: 400px; box-shadow: var(--shadow);
}