:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #3f37c9;
    --success: #4cc9f0;
    --danger: #f72585;
    --warning: #f8961e;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius: 0.375rem;
    --radius-lg: 0.5rem;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
}

a {
    text-decoration: none;
    color: inherit;
}

button, input, select, textarea {
    font-family: inherit;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

.text-center {
    text-align: center;
}

.mt-3 { margin-top: 1rem; }
.mb-3 { margin-bottom: 1rem; }
.p-3 { padding: 1rem; }

/* Main Page Styles */
.main-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('https://images.unsplash.com/photo-1601597111151-db1c9b9b1a77?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 2rem;
}

.color-box {
    max-width: 600px;
    width: 100%;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    color: var(--white);
    backdrop-filter: blur(10px);
    background-color: rgba(0, 0, 0, 0.5);
}

/* Admin Styles */
.admin-header {
    background: var(--dark);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-nav {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
}

.admin-nav a {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.admin-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

/* Color Picker */
.color-options {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0;
}

.color-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    border: 2px solid var(--gray-light);
    transition: var(--transition);
}

.color-option input[type="radio"] {
    display: none;
}

.color-option input[type="radio"]:checked + .color-swatch {
    border-color: var(--dark);
    transform: scale(1.1);
    box-shadow: var(--shadow);
}

/* Responsive */
@media (max-width: 768px) {
    .color-options {
        flex-direction: column;
    }
    
    .admin-nav {
        flex-direction: column;
    }
}