/* Theme Variables */
:root {
    /* Light theme (default) */
    --background-color: #ffffff;
    --text-color: #333333;
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    /* Form colors */
    --form-bg: #ffffff;
    --form-border: #dee2e6;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-text: #495057;
    --input-placeholder: #6c757d;
    --input-focus-border: #80bdff;
    --input-focus-shadow: rgba(0, 123, 255, 0.25);
    
    /* Banner colors */
    --banner-bg: #f8d7da;
    --banner-text: #721c24;
    --banner-border: #f5c6cb;
    
    /* Card & Container */
    --card-shadow: rgba(0, 0, 0, 0.1);
    --container-shadow: rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-speed: 0.3s;
}

/* Dark theme */
.dark-theme {
    --background-color: #1a1a1a;
    --text-color: #ffffff;
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    
    /* Form colors - Dark */
    --form-bg: #2d2d2d;
    --form-border: #404040;
    --input-bg: #333333;
    --input-border: #404040;
    --input-text: #ffffff;
    --input-placeholder: #888888;
    --input-focus-border: #0d6efd;
    --input-focus-shadow: rgba(13, 110, 253, 0.25);
    
    /* Banner colors - Dark */
    --banner-bg: #472b2e;
    --banner-text: #f8d7da;
    --banner-border: #712d34;
    
    /* Card & Container - Dark */
    --card-shadow: rgba(0, 0, 0, 0.3);
    --container-shadow: rgba(0, 0, 0, 0.4);
}

/* Base styles */
body {
    background-color: var(--background-color);
    color: var(--text-color);
    transition: all var(--transition-speed) ease;
    min-height: 100vh;
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
}

/* Form Container Styles */
.form-container {
    background-color: var(--form-bg);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 4px 6px var(--card-shadow);
    border: 1px solid var(--form-border);
    transition: all var(--transition-speed) ease;
    opacity: 0;
    transform: translateY(20px);
    display: none;
}

.form-container.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Form Elements */
.form-control {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--input-text);
    transition: all var(--transition-speed) ease;
    padding: 10px 15px;
    border-radius: 5px;
}

.form-control:focus {
    background-color: var(--input-bg);
    border-color: var(--input-focus-border);
    color: var(--input-text);
    box-shadow: 0 0 0 0.25rem var(--input-focus-shadow);
}

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

/* Button Styles */
.btn {
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    filter: brightness(110%);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    filter: brightness(110%);
    transform: translateY(-1px);
}

/* Theme Switcher */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 15px;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Construction Banner */
.construction-banner {
    background-color: var(--banner-bg);
    color: var(--banner-text);
    border: 1px solid var(--banner-border);
    border-radius: 8px;
    padding: 25px;
    margin: 30px auto;
    max-width: 600px;
    text-align: center;
    box-shadow: 0 6px 12px var(--card-shadow);
    transition: all var(--transition-speed) ease;
    animation: fadeInDown 0.5s ease-out;
}

.construction-banner h2 {
    margin-top: 0;
    font-size: 24px;
    font-weight: 600;
    color: var(--banner-text);
}

.construction-banner p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 0;
}

.construction-icon {
    font-size: 48px;
    margin-bottom: 15px;
    animation: bounce 2s infinite;
}

/* Password Strength Indicators */
.password-strength {
    margin-top: 8px;
    font-size: 14px;
    transition: all var(--transition-speed) ease;
}

.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-info { color: var(--info-color) !important; }

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .form-container {
        padding: 20px;
        margin: 10px;
    }
    
    .construction-banner {
        margin: 15px;
        padding: 20px;
    }
    
    .construction-banner h2 {
        font-size: 20px;
    }
    
    .btn {
        padding: 8px 16px;
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: 15px;
    }
    
    .construction-banner {
        padding: 15px;
    }
    
    .construction-banner h2 {
        font-size: 18px;
    }
    
    .construction-icon {
        font-size: 36px;
    }
    
    .btn-group {
        flex-direction: column;
        gap: 10px;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Focus Styles */
:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .theme-switch-wrapper,
    .construction-banner {
        display: none;
    }
}