:root {
    --na-primary: #3D1A5B;
    --na-primary-soft: #5a2d80;
    --na-accent: #F4D17E;
    --na-bg: #f6f4fb;
    --na-text: #1f1235;
    --na-muted: #6b6783;
    --na-border: #e6e1ee;
    --na-error: #c62828;
    --na-radius: 12px;
    --na-shadow: 0 18px 48px rgba(61, 26, 91, 0.12);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--na-text);
    background: var(--na-bg);
}

[dir="rtl"] body { font-family: 'Tajawal', 'Cairo', 'Segoe UI', sans-serif; }

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px 16px;
    background:
        radial-gradient(1200px 600px at -10% -10%, rgba(244, 209, 126, 0.25), transparent 60%),
        radial-gradient(1000px 500px at 110% 110%, rgba(61, 26, 91, 0.18), transparent 60%),
        var(--na-bg);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: #fff;
    border: 1px solid var(--na-border);
    border-radius: var(--na-radius);
    box-shadow: var(--na-shadow);
    padding: 36px 32px;
}

.auth-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 18px;
}

.auth-logo img { height: 72px; width: auto; }

.auth-title {
    margin: 0 0 6px;
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    color: var(--na-primary);
}

.auth-subtitle {
    margin: 0 0 28px;
    text-align: center;
    color: var(--na-muted);
    font-size: 14px;
}

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

.form-field { display: flex; flex-direction: column; gap: 6px; }

.form-field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--na-text);
}

.form-field input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--na-border);
    border-radius: 10px;
    font-size: 14px;
    background: #fff;
    color: var(--na-text);
    transition: border-color .15s, box-shadow .15s;
}

.form-field input:focus {
    outline: none;
    border-color: var(--na-primary);
    box-shadow: 0 0 0 3px rgba(61, 26, 91, 0.12);
}

.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--na-muted);
}

.checkbox { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.checkbox input { accent-color: var(--na-primary); }

.btn-primary {
    background: var(--na-primary);
    color: #fff;
    border: none;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, transform .05s;
}

.btn-primary:hover { background: var(--na-primary-soft); }
.btn-primary:active { transform: translateY(1px); }

.alert {
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 13px;
    margin-bottom: 16px;
}

.alert-danger {
    background: #fdecea;
    color: var(--na-error);
    border: 1px solid #f5c2c0;
}

.field-error {
    font-size: 12px;
    color: var(--na-error);
}

.auth-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 12px;
    color: var(--na-muted);
}

.lang-switch {
    position: absolute;
    top: 18px;
    inset-inline-end: 22px;
    display: inline-flex;
    gap: 6px;
    background: #fff;
    border: 1px solid var(--na-border);
    border-radius: 999px;
    padding: 4px;
}

.lang-switch a {
    text-decoration: none;
    color: var(--na-muted);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 999px;
}

.lang-switch a.active {
    background: var(--na-primary);
    color: #fff;
}