/* Modern Apple-inspired Login Design */
:root {
    /* Colors */
    --primary-blue: #007AFF;
    --primary-blue-dark: #0056CC;
    --secondary-blue: #5856D6;
    --accent-green: #34C759;
    --accent-orange: #FF9500;
    --accent-red: #FF3B30;
    --accent-purple: #AF52DE;
    
    /* Neutrals */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Backgrounds */
    --bg-primary: #F9FAFB;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F3F4F6;
    
    /* Shadows */
    --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);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--gray-900);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

body.modern-login-page {
    background-image: url('../img/background_new.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: 'Inter', sans-serif;
}

.login-wrapper {
    background: rgba(18, 22, 33, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    color: #fff;
    text-align: center;
}

.login-wrapper .logo {
    width: 80px;
    margin-bottom: 1rem;
}

.login-wrapper h2 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.login-wrapper .subtitle {
    color: #28a745;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.form-control.modern-input {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
}

.form-control.modern-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-control.modern-input:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: #007bff;
    box-shadow: none;
    color: #fff;
}

.btn-modern {
    border-radius: 8px;
    padding: 0.75rem;
    font-weight: 600;
    width: 100%;
    margin-bottom: 0.5rem;
    border: none;
    transition: all 0.3s ease;
}

.btn-login {
    background-color: #dc3545;
    color: #fff;
}

.btn-login:hover {
    background-color: #c82333;
}

.btn-back {
    background-color: #4a5568;
    color: #fff;
}

.btn-back:hover {
    background-color: #2d3748;
}

.alert-modern {
    background-color: rgba(220, 53, 69, 0.3);
    border: 1px solid rgba(220, 53, 69, 0.5);
    color: #f8d7da;
    border-radius: 8px;
}

/* Login Container */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    position: relative;
}

/* Login Card */
.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    width: 100%;
    max-width: 450px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
}

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

.login-logo {
    width: 80px;
    height: auto;
    margin-bottom: var(--space-lg);
}

.login-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
    letter-spacing: -0.02em;
}

.login-subtitle {
    font-size: 1rem;
    color: var(--gray-600);
    font-weight: 400;
}

/* Error Message */
.error-message {
    background: rgba(255, 59, 48, 0.1);
    border: 1px solid rgba(255, 59, 48, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--accent-red);
    font-size: 0.9rem;
}

.error-message svg {
    flex-shrink: 0;
}

/* Form Styles */
.login-form {
    margin-bottom: var(--space-xl);
}

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

.form-group.has-error .form-input {
    border-color: var(--accent-red);
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.1);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--gray-900);
    font-size: 0.9rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper svg {
    position: absolute;
    left: var(--space-sm);
    color: var(--gray-400);
    z-index: 1;
}

.form-input {
    width: 100%;
    padding: var(--space-sm) var(--space-sm) var(--space-sm) calc(var(--space-sm) * 2 + 20px);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--white);
    transition: all 0.2s ease;
    color: var(--gray-900);
}

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

.form-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-input:focus + svg {
    color: var(--primary-blue);
}

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

/* Login Button */
.login-button {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    border: none;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    position: relative;
    overflow: hidden;
}

.login-button::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 0.5s;
}

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

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

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

.login-button:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Back Link */
.back-link {
    text-align: center;
    margin-top: var(--space-lg);
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.back-button:hover {
    color: var(--primary-blue);
    background: var(--gray-50);
    text-decoration: none;
}

.back-button:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Footer */
.login-footer {
    margin-top: var(--space-xl);
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-footer p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-xs);
}

.login-footer p:last-child {
    margin-bottom: 0;
}

.login-footer strong {
    color: var(--white);
    font-weight: 600;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.login-card {
    animation: fadeInUp 0.8s ease-out;
}

.login-footer {
    animation: fadeIn 1s ease-out 0.5s both;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-container {
        padding: var(--space-sm);
    }
    
    .login-card {
        padding: var(--space-xl);
        max-width: 100%;
    }
    
    .login-title {
        font-size: 1.75rem;
    }
    
    .login-subtitle {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: var(--space-lg);
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .login-logo {
        width: 60px;
    }
}

/* Focus States for Accessibility */
button:focus, a:focus, input:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #111827;
        --bg-secondary: #1F2937;
        --bg-tertiary: #374151;
    }
    
    .login-card {
        background: rgba(31, 41, 55, 0.95);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .login-title {
        color: var(--white);
    }
    
    .login-subtitle {
        color: var(--gray-300);
    }
    
    .form-input {
        background: var(--gray-800);
        border-color: var(--gray-600);
        color: var(--white);
    }
    
    .form-input::placeholder {
        color: var(--gray-400);
    }
}