/**
 * auth.css - Styles authentification (BACKOFFICE)
 * 
 * Design : moderne, clean, fonctionnel
 * Layout : 'auth' (centré, sans sidebar)
 * Convention : BEM (.auth__element--modifier)
 */

/* ============================================================
   LAYOUT AUTH
   ============================================================ */

.auth {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: var(--gray-50);
}

[data-theme="dark"] .auth {
    background: var(--gray-900);
}

.auth__container {
    width: 100%;
    max-width: 440px;
}

/* ============================================================
   CARD
   ============================================================ */

.auth__card {
    background: var(--bg-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .auth__card {
    border-color: var(--gray-700);
}

/* ============================================================
   HEADER
   ============================================================ */

.auth__header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.auth__logo {
    max-height: 48px;
    margin-bottom: var(--space-md);
}

.auth__logo-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    background: var(--primary-50);
    color: var(--primary-500);
    font-size: 28px;
}

.auth__logo-icon--info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
}

.auth__logo-icon--warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

[data-theme="dark"] .auth__logo-icon {
    background: rgba(139, 92, 246, 0.15);
}

[data-theme="dark"] .auth__logo-icon--info {
    background: rgba(59, 130, 246, 0.15);
}

[data-theme="dark"] .auth__logo-icon--warning {
    background: rgba(245, 158, 11, 0.15);
}

.auth__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.auth__subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================================
   FORM FIELDS
   ============================================================ */

.auth__form-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.auth__field {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.auth__label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.auth__input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.auth__input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-tertiary);
    font-size: 16px;
    pointer-events: none;
    transition: color var(--transition-fast);
}

.auth__input {
    width: 100%;
    height: 48px;
    padding: 0 14px 0 42px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    color: var(--text-primary);
    background: var(--bg-surface);
    transition: all var(--transition-fast);
    outline: none;
}

.auth__input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.auth__input:focus ~ .auth__input-icon,
.auth__input:focus + .auth__input-icon {
    color: var(--primary-500);
}

.auth__input::placeholder {
    color: var(--text-tertiary);
}

.auth__input--error {
    border-color: var(--danger) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
}

/* Toggle password */
.auth__toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    font-size: 18px;
    transition: color var(--transition-fast);
}

.auth__toggle-password:hover {
    color: var(--text-primary);
}

/* Error message */
.auth__error {
    font-size: var(--font-size-xs);
    color: var(--danger);
    min-height: 0;
    transition: all var(--transition-fast);
}

.auth__error:empty {
    display: none;
}

/* ============================================================
   PASSWORD STRENGTH
   ============================================================ */

.auth__password-strength {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: 4px;
}

.auth__strength-bar {
    flex: 1;
    height: 4px;
    background: var(--gray-200);
    border-radius: 2px;
    overflow: hidden;
}

[data-theme="dark"] .auth__strength-bar {
    background: var(--gray-700);
}

.auth__strength-fill {
    height: 100%;
    width: 0;
    border-radius: 2px;
    transition: width var(--transition-normal), background-color var(--transition-normal);
}

.auth__strength-fill--weak { width: 25%; background: var(--danger); }
.auth__strength-fill--fair { width: 50%; background: var(--warning); }
.auth__strength-fill--good { width: 75%; background: var(--info); }
.auth__strength-fill--strong { width: 100%; background: var(--success); }

.auth__strength-text {
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}

.auth__strength-text--weak { color: var(--danger); }
.auth__strength-text--fair { color: var(--warning); }
.auth__strength-text--good { color: var(--info); }
.auth__strength-text--strong { color: var(--success); }

/* ============================================================
   OPTIONS (remember + forgot link)
   ============================================================ */

.auth__options {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.auth__checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.auth__checkbox input[type="checkbox"] {
    display: none;
}

.auth__checkbox-mark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.auth__checkbox input:checked + .auth__checkbox-mark {
    background: var(--primary-500);
    border-color: var(--primary-500);
}

.auth__checkbox input:checked + .auth__checkbox-mark::after {
    content: '';
    width: 5px;
    height: 9px;
    border: 2px solid white;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    margin-top: -2px;
}

.auth__link {
    font-size: var(--font-size-sm);
    color: var(--primary-500);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.auth__link:hover {
    color: var(--primary-600);
}

.auth__link--accent {
    font-weight: 600;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.auth__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    height: 48px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.auth__btn--primary {
    background: var(--primary-500);
    color: white;
}

.auth__btn--primary:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.auth__btn--primary:active {
    transform: translateY(0);
}

.auth__btn--primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.auth__btn--oauth {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.auth__btn--oauth:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

[data-theme="dark"] .auth__btn--oauth:hover {
    background: var(--gray-800);
    border-color: var(--gray-600);
}

.auth__oauth-icon {
    flex-shrink: 0;
}

.auth__btn-loader {
    display: inline-flex;
}

/* ============================================================
   DIVIDER
   ============================================================ */

.auth__divider {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

.auth__divider::before,
.auth__divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

/* ============================================================
   ALERT
   ============================================================ */

.auth__alert {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.auth__alert--danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.auth__alert--success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.auth__alert--warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* ============================================================
   SUCCESS STATE
   ============================================================ */

.auth__success {
    text-align: center;
    padding: var(--space-lg) 0;
}

.auth__success-icon {
    font-size: 48px;
    color: var(--success);
    margin-bottom: var(--space-md);
}

.auth__success-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

/* ============================================================
   FOOTER
   ============================================================ */

.auth__footer {
    text-align: center;
    margin-top: var(--space-xl);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes authSpin {
    to { transform: rotate(360deg); }
}

.auth__spin {
    animation: authSpin 0.8s linear infinite;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 480px) {
    .auth {
        padding: var(--space-md);
        align-items: flex-start;
        padding-top: 10vh;
    }

    .auth__card {
        padding: var(--space-xl) var(--space-lg);
        border-radius: var(--radius-lg);
    }

    .auth__title {
        font-size: var(--font-size-xl);
    }
}