/* ==========================================================================
   Login Page Styles
   Colors: White primary, Dark Blue (#1e3a5f) accent, Red (#dc2626) for errors
   ========================================================================== */

/* CSS Variables */
:root {
    --color-white: #ffffff;
    --color-off-white: #f8fafc;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    --color-dark-blue: #1e3a5f;
    --color-dark-blue-light: #2c5282;
    --color-dark-blue-dark: #1a365d;
    
    --color-red: #dc2626;
    --color-red-light: #fef2f2;
    --color-red-dark: #b91c1c;
    
    --color-info-bg: #eff6ff;
    --color-info-border: #bfdbfe;
    --color-info-text: #1e40af;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Login Page Layout */
.login-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-off-white);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--color-gray-900);
    line-height: 1.5;
}

/* Main Content */
.login-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 1.5rem 3rem;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

/* Login Card */
.login-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: 2.5rem;
    border: 1px solid var(--color-gray-100);
}

.login-card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-card-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-dark-blue);
    margin-bottom: 0.5rem;
}

.login-card-header p {
    font-size: 0.938rem;
    color: var(--color-gray-500);
}

/* Alerts */
.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert-error {
    background-color: var(--color-red-light);
    border: 1px solid var(--color-red);
    color: var(--color-red-dark);
}

.alert-error .alert-icon {
    color: var(--color-red);
    flex-shrink: 0;
}

.alert-info {
    background-color: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    color: var(--color-info-text);
    flex-wrap: wrap;
    justify-content: space-between;
}

.logout-link {
    color: var(--color-dark-blue);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.logout-link:hover {
    color: var(--color-dark-blue-dark);
    text-decoration: underline;
}

/* Form */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
}

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

.forgot-link {
    font-size: 0.813rem;
    color: var(--color-dark-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.forgot-link:hover {
    color: var(--color-dark-blue-dark);
    text-decoration: underline;
}

/* Input Wrapper */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 1rem;
    color: var(--color-gray-400);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    font-size: 0.938rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background-color: var(--color-white);
    color: var(--color-gray-900);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-input:hover {
    border-color: var(--color-gray-300);
}

.form-input:focus {
    border-color: var(--color-dark-blue);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
    color: var(--color-dark-blue);
}

/* Password Toggle Button */
.toggle-password {
    position: absolute;
    right: 0.75rem;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-gray-400);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
    border-radius: var(--radius-sm);
}

.toggle-password:hover {
    color: var(--color-gray-600);
}

.toggle-password:focus {
    outline: none;
    color: var(--color-dark-blue);
}

/* Input with toggle password */
.input-wrapper:has(.toggle-password) .form-input {
    padding-right: 3rem;
}

/* Submit Button */
.btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-dark-blue);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    margin-top: 0.5rem;
}

.btn-submit:hover {
    background-color: var(--color-dark-blue-dark);
    box-shadow: var(--shadow-md);
}

.btn-submit:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.3);
}

.btn-submit:active {
    transform: scale(0.98);
}

.btn-submit svg {
    transition: transform var(--transition-fast);
}

.btn-submit:hover svg {
    transform: translateX(4px);
}

/* Register Prompt */
.register-prompt {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-gray-200);
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

.register-link {
    color: var(--color-dark-blue);
    font-weight: 600;
    text-decoration: none;
    margin-left: 0.25rem;
    transition: color var(--transition-fast);
}

.register-link:hover {
    color: var(--color-dark-blue-dark);
    text-decoration: underline;
}

/* Footer */
.login-footer {
    padding: 1.5rem;
    text-align: center;
    font-size: 0.813rem;
    color: var(--color-gray-500);
    border-top: 1px solid var(--color-gray-200);
    background-color: var(--color-white);
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-main {
        padding: 5rem 1rem 2rem;
    }
    
    .login-card {
        padding: 1.5rem;
        border-radius: var(--radius-lg);
    }
    
    .login-card-header h1 {
        font-size: 1.5rem;
    }
    
    .label-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .forgot-link {
        align-self: flex-end;
        margin-top: -0.25rem;
    }
}

/* Focus visible for accessibility */
@supports selector(:focus-visible) {
    .form-input:focus {
        border-color: var(--color-gray-200);
        box-shadow: none;
    }
    
    .form-input:focus-visible {
        border-color: var(--color-dark-blue);
        box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
    }
}

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