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

html {
    height: 100%;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    min-height: 100vh;
    min-height: calc(var(--vh, 1vh) * 100);
    display: flex;
    flex-direction: column;
}

/* Login Container */
.login-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 20px;
}

/* Header */
.login-header {
    text-align: center;
    padding: 20px 0 30px;
    position: relative;
}

.logo-container {
    margin-bottom: 20px;
}

.logo {
    height: 60px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.institution-name {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.login-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.login-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    opacity: 0.8;
}

/* Login Card */
.login-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    max-width: 440px;
    width: 100%;
    margin: 0 auto 30px;
    padding: 30px;
    position: relative;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

.alert-error {
    background-color: #ffebee;
    border: 1px solid #ffcdd2;
    color: var(--error-color);
}

.alert-success {
    background-color: #e8f5e9;
    border: 1px solid #c8e6c9;
    color: var(--success-color);
}

.alert-icon {
    font-size: 16px;
    flex-shrink: 0;
    line-height: 1.2;
}

/* Form */
.login-form {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.label-text {
    flex: 1;
}

.required {
    color: var(--error-color);
    font-size: 12px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--white);
    color: var(--text-primary);
    transition: all 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb, 0, 51, 102), 0.1);
}

.form-input::placeholder {
    color: #999;
    opacity: 0.7;
}

.input-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
    opacity: 0.8;
}

/* Password Wrapper */
.password-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1;
    border-radius: 4px;
    transition: color 0.2s;
}

.password-toggle:hover {
    color: var(--primary-color);
    background: rgba(0,0,0,0.05);
}

.password-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb, 0, 51, 102), 0.2);
}

/* Buttons */
.form-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 30px;
}

.btn {
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
    position: relative;
    min-height: 48px;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #e8e8e8;
    border-color: var(--primary-color);
}

.btn-apply {
    background-color: var(--warning-color);
    color: white;
}

.btn-apply:hover {
    background-color: #d45a00;
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

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

.btn.loading {
    cursor: wait;
}

.btn-text {
    transition: opacity 0.2s;
}

.btn-loader {
    display: none;
    font-size: 20px;
    animation: pulse 1.5s infinite;
}

/* Links */
.login-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.login-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Info Section */
.login-info {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--text-secondary);
}

.info-item {
    margin-bottom: 15px;
}

.info-item ul {
    list-style: none;
    margin-top: 8px;
    padding-left: 0;
}

.info-item li {
    padding: 2px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-item li:before {
    content: "•";
    color: var(--primary-color);
    font-size: 16px;
}

.security-notice {
    background: var(--bg-light);
    border-radius: 6px;
    padding: 10px 15px;
    text-align: center;
    margin-top: 15px;
    color: var(--text-secondary);
}

/* Footer */
.login-footer {
    margin-top: auto;
    padding: 20px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    border-top: 1px solid rgba(0,0,0,0.1);
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 10px 0;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.browser-info {
    margin-top: 10px;
    font-size: 11px;
    opacity: 0.7;
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .login-container {
        padding: 10px;
    }
    
    .login-header {
        padding: 15px 0 20px;
    }
    
    .logo {
        height: 50px;
    }
    
    .institution-name {
        font-size: 20px;
    }
    
    .login-title {
        font-size: 18px;
    }
    
    .login-card {
        padding: 20px;
        margin-bottom: 20px;
    }
    
    .btn {
        padding: 12px 16px;
        min-height: 44px;
    }
    
    .login-links {
        gap: 15px;
    }
    
    .footer-links {
        gap: 15px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .login-container {
        padding: 8px;
    }
    
    .logo {
        height: 40px;
    }
    
    .institution-name {
        font-size: 18px;
    }
    
    .login-card {
        padding: 16px;
        border: none;
        box-shadow: none;
        background: transparent;
    }
    
    .form-input {
        padding: 10px 14px;
    }
    
    .btn {
        padding: 12px;
    }
    
    .login-links {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 8px;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .form-input {
        border-width: 2px;
    }
    
    .btn {
        border-width: 2px;
    }
}

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

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
        color: #e0e0e0;
    }
    
    .login-card {
        background: #2d2d2d;
        border-color: #404040;
        box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    
    .form-input {
        background: #3d3d3d;
        border-color: #505050;
        color: #e0e0e0;
    }
    
    .form-input::placeholder {
        color: #aaa;
    }
    
    .btn-secondary {
        background: #3d3d3d;
        border-color: #505050;
        color: #e0e0e0;
    }
    
    .btn-secondary:hover {
        background: #4d4d4d;
    }
    
    .security-notice {
        background: #3d3d3d;
        color: #aaa;
    }
    
    .login-footer {
        border-top-color: #404040;
        color: #aaa;
    }
    
    .footer-links a {
        color: #aaa;
    }
    
    .alert-error {
        background-color: #3a1d1d;
        border-color: #5d3636;
    }
    
    .alert-success {
        background-color: #1d3a1d;
        border-color: #365d36;
    }
}

/* Print Styles */
@media print {
    .login-container {
        max-width: none;
        padding: 0;
    }
    
    .login-card,
    .login-footer {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .btn,
    .login-link,
    .footer-links,
    .password-toggle {
        display: none !important;
    }
}