/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties for consistent theming */
:root {
    /* Color Palette - Soft Dark Theme */
    --bg-primary: linear-gradient(135deg, #0f172a 0%, #1e293b 25%, #334155 75%, #475569 100%);
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-card-hover: rgba(51, 65, 85, 0.9);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --accent-primary: #60a5fa;
    --accent-secondary: #a78bfa;
    --accent-tertiary: #22d3ee;
    
    --border-color: rgba(148, 163, 184, 0.2);
    --border-hover: rgba(203, 213, 225, 0.3);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

/* Base HTML and Body */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: var(--space-xl) 0;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.main-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
    font-family: var(--font-mono);
}

.title-accent {
    color: var(--accent-primary);
}

.title-by {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 0.7em;
}

.title-author {
    color: var(--accent-secondary);
}

.subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: var(--space-sm);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dojo Grid */
.dojo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Dojo Card Styles */
.dojo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    min-height: 200px;
    backdrop-filter: blur(20px);
}

.dojo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.dojo-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.dojo-card:hover::before {
    transform: scaleX(1);
}

.dojo-card:hover .dojo-icon {
    color: var(--accent-primary);
    transform: scale(1.1);
}

.dojo-card:hover .dojo-number {
    opacity: 1;
    transform: translateY(0);
}

/* Dojo Content */
.dojo-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    height: 100%;
    position: relative;
    padding-bottom: 60px;
}

.dojo-icon {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    transition: all var(--transition-normal);
}

.dojo-icon svg {
    width: 64px;
    height: 64px;
}

.dojo-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-family: var(--font-mono);
}

.dojo-subtitle {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    font-family: var(--font-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dojo-number {
    position: absolute;
    bottom: 16px;
    right: 16px;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-tertiary);
    opacity: 0.4;
    font-family: var(--font-mono);
    transform: translateY(10px);
    transition: all var(--transition-normal);
    z-index: 1;
}

/* Lock Icon Styles */
.lock-icon {
    position: absolute;
    top: 16px;
    left: 16px;
    opacity: 0.8;
    z-index: 2;
}

/* Locked Dojo Styles */
.dojo-locked {
    opacity: 0.5;
    filter: grayscale(80%);
    cursor: not-allowed;
    pointer-events: none;
}

.dojo-locked:hover {
    transform: none;
    background: var(--bg-card);
    border-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

.dojo-locked .dojo-icon {
    opacity: 0.4;
}

.dojo-locked .dojo-title {
    color: var(--text-muted);
}

.dojo-locked .dojo-number {
    opacity: 0.2;
}

/* Responsive Grid Adjustments */
@media (max-width: 768px) {
    .dojo-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .dojo-card {
        padding: var(--space-lg);
        min-height: 160px;
    }
    
    .dojo-icon svg {
        width: 40px;
        height: 40px;
    }
    
    .dojo-number {
        font-size: 2.5rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .dojo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .dojo-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1400px) {
    .dojo-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Footer */
.footer {
    margin-top: var(--space-2xl);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
}

.footer-tagline {
    font-family: var(--font-mono);
    color: var(--accent-tertiary);
    font-weight: 500;
}

/* Accessibility and Focus States */
.dojo-card:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.dojo-card:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Smooth scrolling for all elements */
* {
    scroll-behavior: smooth;
}

/* Additional hover effects for enhanced interactivity */
@media (hover: hover) {
    .dojo-card:hover .dojo-title {
        color: var(--accent-primary);
        transition: color var(--transition-fast);
    }
    
    .dojo-card:hover .dojo-subtitle {
        color: var(--accent-tertiary);
        transition: color var(--transition-fast);
    }
}

/* Print styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .dojo-card {
        background: white;
        border: 1px solid #ccc;
        box-shadow: none;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}