/* Vaucanson Zen Theme - Unified Design System */

:root {
    /* Light Theme (Default) */
    --zen-bg-primary: #f5f5f0;
    --zen-bg-secondary: #ffffff;
    --zen-bg-tertiary: #fafaf8;
    --zen-text-primary: #1a1a1a;
    --zen-text-secondary: #4a5568;
    --zen-text-muted: #718096;
    --zen-border: rgba(0, 0, 0, 0.1);
    --zen-shadow: rgba(0, 0, 0, 0.1);
    --zen-accent: #8b5cf6;
    --zen-accent-light: #a78bfa;
    --zen-accent-dark: #7c3aed;
    --zen-hover-bg: rgba(139, 92, 246, 0.05);
    --zen-card-bg: rgba(255, 255, 255, 0.8);
    --zen-overlay: rgba(0, 0, 0, 0.5);
    --zen-gradient: linear-gradient(135deg, #f5f5f0 0%, #e5e5e0 100%);
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --zen-bg-primary: #1a1a1a;
        --zen-bg-secondary: #2d2d2d;
        --zen-bg-tertiary: #242424;
        --zen-text-primary: #f5f5f0;
        --zen-text-secondary: #9ca3af;
        --zen-text-muted: #6b7280;
        --zen-border: rgba(255, 255, 255, 0.1);
        --zen-shadow: rgba(0, 0, 0, 0.3);
        --zen-accent: #8b5cf6;
        --zen-accent-light: #a78bfa;
        --zen-accent-dark: #7c3aed;
        --zen-hover-bg: rgba(139, 92, 246, 0.1);
        --zen-card-bg: rgba(45, 45, 45, 0.8);
        --zen-overlay: rgba(0, 0, 0, 0.7);
        --zen-gradient: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    }
}

/* Manual Theme Toggle Classes */
body.zen-light {
    --zen-bg-primary: #f5f5f0;
    --zen-bg-secondary: #ffffff;
    --zen-bg-tertiary: #fafaf8;
    --zen-text-primary: #1a1a1a;
    --zen-text-secondary: #4a5568;
    --zen-text-muted: #718096;
    --zen-border: rgba(0, 0, 0, 0.1);
    --zen-shadow: rgba(0, 0, 0, 0.1);
    --zen-hover-bg: rgba(139, 92, 246, 0.05);
    --zen-card-bg: rgba(255, 255, 255, 0.8);
    --zen-overlay: rgba(0, 0, 0, 0.5);
    --zen-gradient: linear-gradient(135deg, #f5f5f0 0%, #e5e5e0 100%);
}

body.zen-dark {
    --zen-bg-primary: #1a1a1a;
    --zen-bg-secondary: #2d2d2d;
    --zen-bg-tertiary: #242424;
    --zen-text-primary: #f5f5f0;
    --zen-text-secondary: #9ca3af;
    --zen-text-muted: #6b7280;
    --zen-border: rgba(255, 255, 255, 0.1);
    --zen-shadow: rgba(0, 0, 0, 0.3);
    --zen-hover-bg: rgba(139, 92, 246, 0.1);
    --zen-card-bg: rgba(45, 45, 45, 0.8);
    --zen-overlay: rgba(0, 0, 0, 0.7);
    --zen-gradient: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--zen-gradient);
    color: var(--zen-text-primary);
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* Ensō Circle Component */
.enso-circle {
    stroke: var(--zen-accent);
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    opacity: 0.8;
}

.enso-bg {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    opacity: 0.05;
    pointer-events: none;
    animation: rotateEnso 60s linear infinite;
}

@keyframes rotateEnso {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Cards */
.zen-card {
    background: var(--zen-card-bg);
    border: 1px solid var(--zen-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.zen-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--zen-accent), transparent);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.zen-card:hover {
    transform: translateY(-5px);
    border-color: var(--zen-accent);
    box-shadow: 0 20px 40px var(--zen-shadow);
}

/* Buttons */
.zen-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(139, 92, 246, 0.2) 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50px;
    color: var(--zen-text-primary);
    text-decoration: none;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.zen-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
    border-color: rgba(139, 92, 246, 0.5);
}

.zen-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.3), transparent);
    transition: left 0.5s;
}

.zen-button:hover::before {
    left: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 300;
    letter-spacing: 0.05em;
    color: var(--zen-text-primary);
}

.zen-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 200;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--zen-text-primary) 0%, var(--zen-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--zen-card-bg);
    border: 1px solid var(--zen-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--zen-accent);
}

.theme-toggle-icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-toggle-icon {
    transform: rotate(180deg);
}

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

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--zen-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--zen-accent);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--zen-accent-dark);
}

/* Responsive */
@media (max-width: 768px) {
    .zen-card {
        padding: 1.5rem;
    }
    
    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }
    
    .zen-title {
        letter-spacing: 0.1em;
    }
}

/* Utility Classes */
.zen-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.zen-grid {
    display: grid;
    gap: 2rem;
}

.zen-flex {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.zen-mt-1 { margin-top: 0.5rem; }
.zen-mt-2 { margin-top: 1rem; }
.zen-mt-3 { margin-top: 1.5rem; }
.zen-mt-4 { margin-top: 2rem; }
.zen-mt-5 { margin-top: 3rem; }

.zen-mb-1 { margin-bottom: 0.5rem; }
.zen-mb-2 { margin-bottom: 1rem; }
.zen-mb-3 { margin-bottom: 1.5rem; }
.zen-mb-4 { margin-bottom: 2rem; }
.zen-mb-5 { margin-bottom: 3rem; }