/**
 * Login Page Styles
 * Uses design tokens from design-system.css
 * Version: 2.0.0
 */

/* ========================================
   1. LOGIN WRAPPER & CARD
   ======================================== */

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.5s ease-out;
}

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

/* ========================================
   2. LOGIN HEADER
   ======================================== */

.login-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--text-inverse);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.login-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--spacing-sm) 0;
    position: relative;
    z-index: 1;
}

.login-header h1 .highlight {
    color: #ffd700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.login-header p {
    margin: 0;
    opacity: 0.95;
    font-size: var(--font-size-base);
    position: relative;
    z-index: 1;
}

/* ========================================
   3. LOGIN BODY
   ======================================== */

.login-body {
    padding: var(--spacing-2xl) var(--spacing-lg);
}

/* ========================================
   4. FORM ELEMENTS
   ======================================== */

.form-group-login {
    margin-bottom: var(--spacing-lg);
}

.form-label-login {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-label-login .required {
    color: var(--color-danger);
    margin-left: var(--spacing-xs);
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    z-index: 1;
}

.input-icon-right {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    cursor: pointer;
    z-index: 10;
    transition: color var(--transition-fast);
}

.input-icon-right:hover {
    color: var(--color-primary);
}

.form-control-login {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 2.75rem;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.form-control-login:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(6, 101, 208, 0.15);
}

.form-control-login.is-invalid {
    border-color: var(--color-danger);
    padding-right: 2.75rem;
}

.form-control-login.is-invalid:focus {
    box-shadow: 0 0 0 0.2rem rgba(224, 79, 26, 0.15);
}

.invalid-feedback-login {
    display: none;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
}

.form-control-login.is-invalid ~ .invalid-feedback-login {
    display: block;
}

/* ========================================
   5. FORM OPTIONS
   ======================================== */

.form-options {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.remember-me {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.remember-me input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.remember-me label {
    margin: 0;
    cursor: pointer;
    user-select: none;
    color: var(--text-secondary);
}

/* ========================================
   6. LOGIN BUTTON
   ======================================== */

.btn-login {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-inverse);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

.btn-login:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-login:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-login.loading {
    position: relative;
    color: transparent;
}

.btn-login.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    margin-left: -0.75rem;
    margin-top: -0.75rem;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--text-inverse);
    border-radius: 50%;
    animation: spin var(--transition-base) linear infinite;
}

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

/* ========================================
   7. LOGIN FOOTER
   ======================================== */

.login-footer {
    padding: var(--spacing-lg);
    background-color: var(--bg-secondary);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-color-light);
}

/* ========================================
   8. ALERT MESSAGES (Using Alert Component)
   ======================================== */

.login-body .alert-enhanced {
    animation: slideInDown var(--transition-base) ease-out;
    margin-bottom: var(--spacing-lg);
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-body .alert-enhanced-content {
    align-items: flex-start;
}

.login-body .alert-enhanced-icon {
    margin-top: 0.25rem;
}

.login-body .alert-enhanced ul {
    margin: 0;
    padding-left: 1.25rem;
}

.login-body .alert-enhanced ul li {
    margin-bottom: 0.25rem;
}

.login-body .alert-enhanced ul li:last-child {
    margin-bottom: 0;
}

/* Legacy alert-login class for backward compatibility */
.alert-login {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-danger);
    background-color: #f8d7da;
    color: #721c24;
    animation: slideInDown var(--transition-base) ease-out;
}

.alert-login ul {
    margin: var(--spacing-xs) 0 0 0;
    padding-left: var(--spacing-lg);
}

.alert-login li {
    margin-bottom: var(--spacing-xs);
}

.alert-login li:last-child {
    margin-bottom: 0;
}

/* ========================================
   9. RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 576px) {
    .login-wrapper {
        padding: var(--spacing-sm);
    }

    .login-header {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .login-header h1 {
        font-size: var(--font-size-2xl);
    }

    .login-body {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .login-footer {
        padding: var(--spacing-md);
    }
}

/* ========================================
   10. ACCESSIBILITY
   ======================================== */

.login-card *:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .login-card {
        border: 2px solid var(--border-color-dark);
    }
    
    .form-control-login {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .login-card,
    .alert-login,
    .btn-login {
        animation: none;
        transition: none;
    }
}