* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Navigation */
nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-links a:hover, .nav-links a.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

/* Main Content */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.page-header {
    text-align: center;
    color: white;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Form Styling */
.form-container {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
}

.form-control.valid {
    border-color: #28a745;
    background: #f8fff9;
}

.form-control.invalid {
    border-color: #dc3545;
    background: #fff8f8;
}

.validation-icon {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
}

.validation-icon.valid {
    color: #28a745;
}

.validation-icon.invalid {
    color: #dc3545;
}

.input-wrapper {
    position: relative;
}

.error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.error-message.show {
    display: block;
}

/* Checkbox and Radio Styling */
.checkbox-group, .radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checkbox-item, .radio-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-item input, .radio-item input {
    width: auto;
    margin: 0;
}

/* Slider Styling */
.slider-container {
    margin: 1rem 0;
}

.slider-value {
    font-weight: bold;
    color: #667eea;
    margin-left: 1rem;
}

.price-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #e1e5e9;
    outline: none;
    -webkit-appearance: none;
}

.price-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
}

.price-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    border: none;
}

/* Color Picker Styling */
.color-picker-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.color-picker {
    width: 60px;
    height: 40px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.color-value {
    font-weight: bold;
    color: #333;
    padding: 0.5rem;
    background: #f8f9fa;
    border-radius: 5px;
}

/* Button Styling */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #545b62;
}

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

/* Notification Styling */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    max-width: 400px;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification.success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.notification.error {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

.notification-close {
    position: absolute;
    top: 5px;
    right: 10px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: inherit;
}

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

.password-toggle {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: #667eea;
}

/* File Upload Styling */
.file-upload {
    border: 2px dashed #e1e5e9;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-upload:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.file-upload input {
    display: none;
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 20px;
    border-radius: 8px;
    width: 80%;
    max-width: 500px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1rem;
    }

    .form-container {
        padding: 1.5rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .modal-content {
        width: 95%;
        margin: 20% auto;
    }
}