/**
 * Login Sayfası CSS
 * Etüt Merkezi Yönetim Sistemi v2.0
 */

/* Login Body */
.login-body {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
    position: relative;
    overflow: hidden;
}

/* Background Pattern */
.login-body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
}

/* Login Card */
.login-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.6s ease-out;
}

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

/* Login Header */
.login-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.logo-container {
    margin-bottom: var(--spacing-6);
}

.login-logo {
    max-width: 120px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.login-logo:hover {
    transform: scale(1.05);
}

.login-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-subtitle {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

/* Login Form */
.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.form-group {
    margin-bottom: 0;
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-3);
}

.form-label i {
    color: var(--primary-color);
    font-size: var(--font-size-base);
}

.form-input {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-5);
    font-size: var(--font-size-base);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background-color: var(--gray-50);
    transition: all var(--transition-normal);
    font-family: var(--font-family);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

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

/* Password Input Container */
.password-input-container {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.password-toggle:hover {
    color: var(--primary-color);
    background-color: var(--gray-100);
}

/* Form Options */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: var(--spacing-2) 0;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    user-select: none;
}

.checkbox-container input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Login Button */
.btn-login {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn-login:hover::before {
    left: 100%;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-login:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Login Footer */
.login-footer {
    text-align: center;
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--gray-200);
}

.login-footer p {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    margin-bottom: var(--spacing-1);
}

/* Alert Styles for Login */
.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
}

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

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert i {
    font-size: var(--font-size-base);
}

/* Loading Overlay for Login */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--spacing-4);
    z-index: 9999;
    color: white;
    backdrop-filter: blur(5px);
}

.loading-overlay p {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 640px) {
    .login-body {
        padding: var(--spacing-2);
    }
    
    .login-card {
        padding: var(--spacing-6);
        margin: var(--spacing-2);
    }
    
    .login-title {
        font-size: var(--font-size-xl);
    }
    
    .form-input {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: var(--font-size-sm);
    }
    
    .btn-login {
        padding: var(--spacing-3) var(--spacing-5);
        font-size: var(--font-size-sm);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .login-card {
        background: rgba(30, 41, 59, 0.95);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .login-title {
        color: white;
    }
    
    .login-subtitle {
        color: var(--gray-300);
    }
    
    .form-input {
        background-color: rgba(51, 65, 85, 0.5);
        border-color: rgba(255, 255, 255, 0.1);
        color: white;
    }
    
    .form-input:focus {
        background-color: rgba(51, 65, 85, 0.8);
        border-color: var(--primary-color);
    }
    
    .form-input::placeholder {
        color: var(--gray-400);
    }
    
    .form-label {
        color: var(--gray-300);
    }
    
    .checkbox-container {
        color: var(--gray-300);
    }
    
    .login-footer p {
        color: var(--gray-400);
    }
}

/* Animation for form focus */
.form-input:focus + .password-toggle {
    color: var(--primary-color);
}

/* Success animation */
.btn-login.success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

/* Error shake animation */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.form-input.error {
    border-color: var(--error-color);
    animation: shake 0.5s ease-in-out;
}

/* Accessibility */
.form-input:focus,
.btn-login:focus,
.password-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .login-card {
        border: 2px solid var(--gray-800);
    }
    
    .form-input {
        border: 2px solid var(--gray-800);
    }
    
    .btn-login {
        border: 2px solid white;
    }
}