/**
 * Admin Login Page CSS
 * Mobile-first responsive design
 * Note: Base styles are loaded via HTML link tag
 */

/* Login Page Layout */
.login-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-link) 0%, var(--btn-secondary-bg) 100%);
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Login Header */
.login-header {
    background: var(--color-link);
    color: var(--color-on-brand);
    padding: var(--spacing-lg);
    text-align: center;
}

.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 50%;
    background: #ffffff;
    padding: var(--spacing-sm);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.login-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.login-title {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 700;
}

.login-subtitle {
    margin: var(--spacing-xs) 0 0;
    font-size: 0.95rem;
    opacity: 0.9;
    font-weight: 400;
}

/* Login Form */
.login-form {
    padding: var(--spacing-lg);
}

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

.login-form .form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.95rem;
}

.login-form .form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    background-color: var(--color-surface);
    color: var(--color-text);
}

.login-form .form-input:focus {
    outline: none;
    border-color: var(--color-link);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

/* Remember Me Checkbox */
.login-remember {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.login-remember input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--color-link);
}

.login-remember label {
    cursor: pointer;
    user-select: none;
    font-size: 0.95rem;
    color: var(--color-text);
}

/* Login Button */
.login-button {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--btn-primary-bg) 0%, var(--btn-primary-hover) 100%);
    color: var(--color-on-brand);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-shadow);
}

.login-button:active {
    transform: translateY(0);
}

.login-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Login Footer */
.login-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-surface-muted);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.login-footer-text {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Error State */
.form-input.error {
    border-color: var(--red);
}

.form-error {
    color: var(--red);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    display: block;
}

/* Loading State */
.login-button.loading {
    position: relative;
    color: transparent;
}

.login-button.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-on-brand);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

[data-theme="dark"] .login-container {
    border: 1px solid var(--color-border);
}

[data-theme="dark"] .login-logo {
    background: #ffffff;
    border: 1px solid var(--color-border);
}

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

/* Tablet & Desktop */
@media (min-width: 768px) {
    .login-page {
        padding: var(--spacing-xl);
    }
    
    .login-container {
        max-width: 420px;
    }
    
    .login-header {
        padding: var(--spacing-lg) var(--spacing-xl);
    }
    
    .login-logo {
        width: 90px;
        height: 90px;
    }
    
    .login-form {
        padding: var(--spacing-lg) var(--spacing-xl);
    }
}

/* Large Desktop */
@media (min-width: 1024px) {
    .login-container {
        max-width: 440px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}