/*!
 * NEXUS Backoffice - Authentication Styles
 * Module: auth.css
 * Version: 2.0.0
 * Updated: 2025-11-07 - Modern centered layout
 */

/* ========================================
   AUTH LAYOUT (Centered Design)
   ======================================== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background: linear-gradient(135deg,
        rgba(52, 152, 219, 0.05) 0%,
        rgba(155, 89, 182, 0.05) 100%
    );
    position: relative;
    overflow: hidden;
}

/* Animated background pattern */
.auth-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(52, 152, 219, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(155, 89, 182, 0.03) 0%, transparent 50%);
    animation: rotateBackground 30s linear infinite;
    pointer-events: none;
}

@keyframes rotateBackground {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.auth-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
}

/* Logo Section */
.auth-logo {
    text-align: center;
    margin-bottom: var(--space-2xl);
    animation: fadeInDown 0.6s ease-out;
}

.auth-logo i {
    font-size: 3.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    margin-bottom: var(--space-sm);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.auth-logo h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.5px;
}

.auth-logo p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin: var(--space-xs) 0 0 0;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Auth Card */
.auth-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow:
        0 4px 6px rgba(0, 0, 0, 0.07),
        0 10px 20px rgba(0, 0, 0, 0.1),
        0 0 0 1px var(--border-primary);
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out 0.2s both;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.auth-card:hover {
    transform: translateY(-2px);
    box-shadow:
        0 8px 12px rgba(0, 0, 0, 0.1),
        0 16px 32px rgba(0, 0, 0, 0.12),
        0 0 0 1px var(--border-primary);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.auth-footer {
    text-align: center;
    margin-top: var(--space-xl);
    animation: fadeIn 0.6s ease-out 0.4s both;
}

.auth-footer p {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin: 0;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Theme Toggle Position (Floating) */
.theme-toggle-floating {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    .auth-wrapper {
        padding: var(--space-lg);
    }

    .auth-card {
        padding: var(--space-xl);
    }

    .auth-logo i {
        font-size: 3rem;
    }

    .auth-logo h1 {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 480px) {
    .auth-wrapper {
        padding: var(--space-md);
        align-items: flex-start;
        padding-top: var(--space-2xl);
    }

    .auth-card {
        padding: var(--space-lg);
    }

    .auth-logo {
        margin-bottom: var(--space-xl);
    }

    .auth-logo i {
        font-size: 2.5rem;
    }
}

/* ========================================
   AUTH HEADER
   ======================================== */
.auth-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.auth-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.auth-header p {
    margin: 0;
    font-size: var(--font-size-base);
}

/* ========================================
   FORM CONTROLS
   ======================================== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-text {
    display: block;
    margin-top: var(--space-sm);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ========================================
   INPUT GROUP (PASSWORD TOGGLE)
   ======================================== */
.input-group {
    display: flex;
    gap: 0;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    flex: 1;
}

.input-group .btn-icon {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-left: none;
    width: 44px;
    height: 44px;
}

/* ========================================
   PASSWORD STRENGTH METER
   ======================================== */
.password-strength-meter {
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    width: 0%;
    transition: width var(--transition-normal), background-color var(--transition-normal);
    border-radius: var(--radius-full);
}

.password-strength-text {
    display: block;
    margin-top: var(--space-xs);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ========================================
   PASSWORD REQUIREMENTS
   ======================================== */
.password-requirements {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
}

.password-requirements p {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.password-requirements ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.password-requirements li {
    padding: var(--space-xs) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.password-requirements li::before {
    content: '○';
    color: var(--text-muted);
    font-size: var(--font-size-lg);
}

.password-requirements li.valid {
    color: var(--success);
}

.password-requirements li.valid::before {
    content: '✓';
    color: var(--success);
    font-weight: var(--font-weight-bold);
}

/* ========================================
   CODE INPUT GROUP (2FA)
   ======================================== */
.code-input-group {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    align-items: center;
    margin: var(--space-xl) 0;
}

.code-separator {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-muted);
    padding: 0 var(--space-xs);
}

.code-input {
    width: 52px;
    height: 60px;
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.code-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
    transform: scale(1.08);
}

.code-input.filled {
    background-color: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
}

.code-input.error {
    border-color: var(--error);
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* ========================================
   2FA SETUP STEPS
   ======================================== */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.step-card {
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    gap: var(--space-md);
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.step-content p {
    margin: 0 0 var(--space-sm) 0;
    color: var(--text-secondary);
}

.step-content ul {
    margin: 0;
    padding-left: var(--space-lg);
    color: var(--text-secondary);
}

.step-content li {
    margin: var(--space-xs) 0;
}

/* ========================================
   QR CODE
   ======================================== */
.qr-code-container {
    margin: var(--space-md) 0;
    text-align: center;
}

.qr-code {
    max-width: 200px;
    border: 4px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    background: white;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    background-color: var(--bg-tertiary);
    border: 2px dashed var(--border-primary);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.qr-placeholder i {
    font-size: var(--text-2xl);
    color: var(--text-muted);
}

.qr-placeholder p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ========================================
   MANUAL ENTRY (2FA)
   ======================================== */
.manual-entry {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.manual-entry summary {
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    color: var(--accent-primary);
    user-select: none;
}

.manual-entry summary:hover {
    color: var(--accent-hover);
}

.secret-code {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: var(--space-md) 0;
}

.secret-code code {
    flex: 1;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    letter-spacing: 2px;
    color: var(--accent-primary);
}

/* ========================================
   VERIFY ICON (2FA)
   ======================================== */
.verify-icon {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.verify-icon i {
    font-size: var(--text-2xl);
    color: var(--accent-primary);
}

/* ========================================
   INFO CARD (REGISTRATION)
   ======================================== */
.info-card {
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-xl);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
}

.info-row:not(:last-child) {
    border-bottom: 1px solid var(--border-secondary);
}

.info-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.info-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

/* ========================================
   CHECKBOX LABEL
   ======================================== */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    margin-top: 2px;
    flex-shrink: 0;
}

.checkbox-label a {
    color: var(--accent-primary);
    text-decoration: none;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.alert i {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-success {
    background-color: rgba(46, 204, 113, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

/* ========================================
   LINKS
   ======================================== */
.link-primary {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

.link-primary:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.link-secondary {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

.link-secondary:hover {
    color: var(--accent-primary);
    text-decoration: underline;
}

/* ========================================
   DIVIDER
   ======================================== */
.divider {
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin: var(--space-lg) 0;
    position: relative;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background-color: var(--border-primary);
}

.divider::before {
    left: 0;
}

.divider::after {
    right: 0;
}

/* ========================================
   EMPTY STATE
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) 0;
}

.empty-state-icon {
    font-size: var(--text-2xl);
    color: var(--warning);
    margin-bottom: var(--space-md);
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.empty-state-message {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin: 0 0 var(--space-xl) 0;
}

/* ========================================
   HELP TEXT
   ======================================== */
.help-text {
    text-align: center;
    margin: var(--space-lg) 0;
}

.help-text p {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.help-text i {
    color: var(--info);
}

/* ========================================
   LOADING STATE
   ======================================== */
.btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid var(--text-inverse);
    border-radius: var(--radius-full);
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 480px) {
    .code-input {
        width: 44px;
        height: 52px;
        font-size: var(--font-size-2xl);
    }

    .verify-icon i {
        font-size: var(--text-2xl);
    }

    .step-card {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin: 0 auto;
    }
}