:root {
    --bg-1: #020617;
    --bg-2: #0f172a;
    --card: rgba(15, 23, 42, 0.85);

    --border: #1f2937;
    --text: #e5e7eb;
    --muted: #94a3b8;

    --primary: #3b82f6;
    --primary-hover: #2563eb;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-1), var(--bg-2));
    color: var(--text);
}

/* Center layout */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    padding: 20px;
}

/* Card */
.auth-card {
    width: 100%;
    max-width: 400px;
    padding: 36px;

    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;

    backdrop-filter: blur(12px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

/* Header */
.auth-header {
    text-align: center;
    margin-bottom: 24px;
}

.brand {
    font-weight: 600;
    margin-bottom: 8px;
}

.auth-header h1 {
    font-size: 20px;
    margin: 0;
}

.subtitle {
    font-size: 13px;
    color: var(--muted);
    margin-top: 6px;
}

/* Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group label {
    font-size: 13px;
    margin-bottom: 4px;
    display: block;
    color: var(--muted);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;

    border-radius: 8px;
    border: 1px solid var(--border);

    background: rgba(255,255,255,0.02);
    color: var(--text);

    outline: none;
    transition: all 0.2s ease;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59,130,246,0.25);
}

/* Button */
.btn-primary {
    margin-top: 10px;
    padding: 11px;

    border: none;
    border-radius: 8px;

    background: var(--primary);
    color: #fff;
    font-weight: 500;

    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

/* Error */
.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;

    padding: 10px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 12px;
}

/* Footer */
.auth-footer {
    margin-top: 20px;
    text-align: center;
    font-size: 12px;
    color: var(--muted);
}