* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: radial-gradient(circle at top left, #0f2027, #203a43, #2c5364);
    color: #f0f0f0;
    min-height: 100vh;
}

#sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 220px;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    display: flex;
    flex-direction: column;
}

#sidebar .logo-area-spacer { padding-top: 10px; }

#sidebar nav a {
    display: block;
    padding: 12px 20px;
    color: #ddd;
    text-decoration: none;
    transition: 0.2s;
}
#sidebar nav a:hover { background: rgba(255,255,255,0.08); color: #00c6ff; }

#content {
    margin-left: 220px;
    padding: 30px;
}

.card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 25px;
    margin-bottom: 25px;
    backdrop-filter: blur(10px);
}

.card h2 { margin-top: 0; color: #00c6ff; }

label { display: block; margin: 12px 0 6px; color: #ccc; font-weight: 500; }

input[type=text], input[type=password], select {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: none;
    background: rgba(255,255,255,0.08);
    color: #fff;
}

input[type=color] {
    width: 60px;
    height: 36px;
    border: none;
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
}

button, .btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 30px;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: #fff;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
}
button:hover, .btn:hover { transform: translateY(-2px); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 20px; }

.preset-swatch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 10px;
    border: 2px solid transparent;
    cursor: pointer;
    margin: 4px;
    background: rgba(255,255,255,0.05);
}
.preset-swatch.ativo { border-color: #00c6ff; }
.preset-swatch .dot { width: 18px; height: 18px; border-radius: 50%; display: inline-block; }

.color-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.color-row label { margin: 0; width: 220px; flex-shrink: 0; }
.color-row input[type=range] { accent-color: #00c6ff; }

.login-container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    padding: 30px 25px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    width: 320px;
    text-align: center;
    margin: 10vh auto;
}
.login-container h2 { color: #00c6ff; }
.error-message {
    margin-top: 10px;
    background: rgba(255, 0, 0, 0.1);
    padding: 10px;
    border-radius: 8px;
    color: #ff6b6b;
}