/**
 * SONEUK Modern Design System
 * Modern, responsive design with Tailwind-inspired utilities
 */

:root {
    /* SONEUK Brand Colors */
    --soneuk-primary: #28a745;
    --soneuk-primary-dark: #218838;
    --soneuk-primary-light: #34ce57;
    --soneuk-secondary: #007bff;
    --soneuk-accent: #ffc107;
    --soneuk-dark: #1a1a1a;
    --soneuk-light: #f8f9fa;
    
    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
}

/* Modern Reset & Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: #333;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modern Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Modern Buttons */
.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
}

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

.btn-modern-primary:hover {
    background: var(--soneuk-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-modern-secondary {
    background: var(--soneuk-secondary);
    color: white;
}

.btn-modern-secondary:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-modern-outline {
    background: transparent;
    border: 2px solid var(--soneuk-primary);
    color: var(--soneuk-primary);
}

.btn-modern-outline:hover {
    background: var(--soneuk-primary);
    color: white;
    transform: translateY(-2px);
}

/* Modern Cards */
.card-modern {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card-modern:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-modern-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-modern-body {
    padding: var(--spacing-lg);
}

.card-modern-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--soneuk-light);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* Modern Badges */
.badge-modern {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--soneuk-primary);
    color: white;
}

.badge-modern-secondary {
    background: var(--soneuk-secondary);
}

.badge-modern-accent {
    background: var(--soneuk-accent);
    color: #333;
}

/* Modern Forms */
.form-modern {
    width: 100%;
}

.form-modern-group {
    margin-bottom: var(--spacing-md);
}

.form-modern-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: #333;
}

.form-modern-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: white;
}

.form-modern-input:focus {
    outline: none;
    border-color: var(--soneuk-primary);
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
}

/* Modern Grid System */
.grid-modern {
    display: grid;
    gap: var(--spacing-lg);
}

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

.grid-modern-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-modern-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Modern Sections */
.section-modern {
    padding: var(--spacing-2xl) 0;
}

.section-modern-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-modern-title h2 {
    font-size: 2.5rem;
    color: var(--soneuk-dark);
    margin-bottom: var(--spacing-sm);
}

.section-modern-title p {
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Modern Hero Section */
.hero-modern {
    position: relative;
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--soneuk-primary) 0%, var(--soneuk-primary-dark) 100%);
    color: white;
    overflow: hidden;
}

.hero-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-modern-content {
    position: relative;
    z-index: 1;
}

/* Modern Navigation */
.nav-modern {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Modern Footer */
.footer-modern {
    background: var(--soneuk-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-modern a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-modern a:hover {
    color: var(--soneuk-primary-light);
}

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

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Responsive Utilities */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .section-modern {
        padding: var(--spacing-xl) 0;
    }
    
    .grid-modern-2,
    .grid-modern-3,
    .grid-modern-4 {
        grid-template-columns: 1fr;
    }
}

/* Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--soneuk-primary), var(--soneuk-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-modern {
    box-shadow: var(--shadow-lg);
}

.rounded-modern {
    border-radius: var(--radius-lg);
}