/* ==========================================
   NYMSLAND UI/UX REDESIGN - DOCUMENTATION STYLES
   ========================================== */

/* === CSS VARIABLES === */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-secondary: #3b82f6;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Space Grotesk', 'Poppins', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === CONTAINER === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* === HERO SECTION === */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

/* === CONCEPT NAVIGATION === */
.concept-nav {
    background: var(--color-surface);
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.concept-nav .container {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    overflow-x: auto;
    scrollbar-width: thin;
}

.concept-nav .container::-webkit-scrollbar {
    height: 4px;
}

.concept-nav .container::-webkit-scrollbar-track {
    background: var(--color-bg);
}

.concept-nav .container::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 2px;
}

.nav-btn {
    flex-shrink: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.nav-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

/* === MAIN CONTENT === */
.main-content {
    padding: var(--spacing-2xl) 0;
    min-height: 60vh;
}

/* === CONCEPT SECTIONS === */
.concept-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.concept-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.concept-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 3px solid var(--color-border);
}

.concept-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.concept-tagline {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--color-text-muted);
    font-style: italic;
}

/* === CONCEPT GRID === */
.concept-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 1024px) {
    .concept-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === CONCEPT CARDS === */
.concept-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.concept-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.concept-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.concept-card h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.concept-card p {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.concept-card ul {
    list-style: none;
    padding-left: 0;
}

.concept-card ul li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
    line-height: 1.7;
}

.concept-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.concept-card strong {
    color: var(--color-text);
    font-weight: 600;
}

/* === COLOR PALETTE CARD === */
.palette-card {
    grid-column: 1 / -1;
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.color-swatch {
    height: 120px;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.color-swatch:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.color-hex {
    font-family: 'Space Grotesk', monospace;
    font-weight: 700;
    font-size: 1rem;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--spacing-xs);
}

.color-name {
    font-size: 0.875rem;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

/* === RECOMMENDATION SECTION === */
.recommendation-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.recommendation-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.recommendation-card.winner {
    border: 3px solid var(--color-success);
    background: linear-gradient(to bottom, rgba(34, 197, 94, 0.05), var(--color-surface));
    position: relative;
    overflow: hidden;
}

.recommendation-card.winner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-success), var(--color-warning), var(--color-success));
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

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

.recommendation-card h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.recommendation-card h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.recommendation-reason {
    font-size: 1.125rem;
    color: var(--color-success);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.recommendation-card ul,
.recommendation-card ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.recommendation-card li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.implementation-strategy,
.technical-notes {
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.implementation-strategy h3,
.technical-notes h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

/* === FOOTER === */
.footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.footer p {
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

/* === RESPONSIVE ADJUSTMENTS === */
@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .concept-nav .container {
        padding: var(--spacing-sm);
    }
    
    .nav-btn {
        font-size: 0.875rem;
        padding: var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-lg) 0;
    }
    
    .concept-card {
        padding: var(--spacing-md);
    }
    
    .color-palette {
        grid-template-columns: 1fr;
    }
}

/* === PRINT STYLES === */
@media print {
    .hero,
    .concept-nav,
    .footer {
        display: none;
    }
    
    .concept-section {
        display: block !important;
        page-break-after: always;
    }
    
    .concept-card {
        page-break-inside: avoid;
    }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* === UTILITY CLASSES === */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}