/* ==========================================================================
   CSS Variables & Theme Tokens
   ========================================================================== */
   :root {
    /* Color Palette - Dark (Default) */
    --bg-primary: #0a0a0c;
    --bg-secondary: #121216;
    --text-primary: #ffffff;
    --text-secondary: #a0a0ab;
    
    --accent-color: #ffab60;
    --accent-hover: #e07830;
    --accent-gradient: linear-gradient(135deg, #ff8a50 0%, #ffc06a 100%);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-blur: blur(12px);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Noto Sans JP', 'Outfit', sans-serif;
    
    /* Spacing & Utilities */
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --border-radius-full: 9999px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    
    --accent-color: #e07830;
    --accent-hover: #d06015;
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: clip;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* Background Elements */
.bg-shape {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.5;
    pointer-events: none;
    animation: float 20s infinite alternate ease-in-out;
}

.shape-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(255,171,96,0.2) 0%, rgba(255,171,96,0) 70%);
}

.shape-2 {
    bottom: 20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(255,138,80,0.2) 0%, rgba(255,138,80,0) 70%);
    animation-delay: -5s;
}

.bg-grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 50;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Animations */
@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(5%, 5%); }
}

@keyframes slideUpFade {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

.animate-up {
    animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--border-radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(255, 171, 96, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 171, 96, 0.4);
}

.btn-secondary {
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--glass-bg);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: all var(--transition-normal);
    border-top: none;
    border-left: none;
    border-right: none;
    border-radius: 0;
}

.navbar.scrolled {
    background: var(--glass-bg);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo i {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.nav-link:hover {
    color: var(--text-primary);
}

/* Mobile nav icon links (hidden on desktop) */
.nav-icon-link {
    display: none;
}

@media (max-width: 768px) {
    .nav-icon-link {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        border: 1px solid var(--glass-border);
        color: var(--text-secondary);
        font-size: 1.2rem;
        transition: all var(--transition-fast);
    }

    .nav-icon-link:hover {
        color: var(--text-primary);
        background: var(--glass-bg);
    }
}

/* Language Selector */
.lang-selector {
    position: relative;
    display: inline-block;
}

.lang-menu {
    position: absolute;
    top: 120%;
    right: 0;
    min-width: 120px;
    padding: 8px 0;
    border-radius: var(--border-radius-sm);
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.lang-selector:hover .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-menu a {
    padding: 8px 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.lang-menu a:hover {
    color: var(--accent-color);
    background: rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 60px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: var(--border-radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--accent-color);
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.repo-links {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.divider {
    color: var(--text-secondary);
    opacity: 0.5;
}

.repo-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

.repo-link:hover {
    color: var(--text-primary);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    border-radius: 40px;
    padding: 12px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: perspective(1000px) rotateY(-10deg) rotateX(5deg);
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.phone-mockup:hover {
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg) translateY(-10px);
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    overflow: hidden;
    background: #000;
    position: relative;
}

.phone-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.floating-card {
    position: absolute;
    padding: 12px 20px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    animation: float 6s infinite ease-in-out alternate;
}

.floating-card i {
    font-size: 1.2rem;
    color: var(--accent-color);
}

.filter-card {
    top: 20%;
    left: -40px;
}

.grain-card {
    bottom: 30%;
    right: -60px;
    animation-delay: -3s;
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features {
    padding: 100px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: 30px;
}

.feature-card {
    padding: 32px;
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--glass-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Guides Section
   ========================================================================== */
.guides {
    padding: 60px 24px 100px;
    max-width: 1000px;
    margin: 0 auto;
}

.guides-container {
    border-radius: var(--border-radius-lg);
    padding: 60px;
    position: relative;
    overflow: hidden;
}

.guides-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(255,171,96,0.1), transparent 50%);
    pointer-events: none;
}

.guides-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.guides-content p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.guide-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.guide-card {
    display: flex;
    align-items: center;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    gap: 20px;
    transition: all var(--transition-normal);
}

.guide-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
    border-color: rgba(255, 255, 255, 0.15);
}

.guide-card i[class*="ph-logo"] {
    font-size: 2.5rem;
    color: var(--text-primary);
}

.guide-card div {
    flex: 1;
}

.guide-card h4 {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.guide-card span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.guide-card .arrow {
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: transform var(--transition-fast);
}

.guide-card:hover .arrow {
    color: var(--accent-color);
    transform: translateX(5px);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: 40px 24px;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
        gap: 80px;
    }

    .hero-content {
        margin: 0 auto;
    }

    .hero-subtitle {
        margin: 0 auto 40px;
    }

    .hero-actions {
        justify-content: center;
    }

    .repo-links {
        justify-content: center;
    }

    .hero-visual {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        padding-bottom: 20px;
    }

    .phone-mockup {
        transform: none;
        margin: 0 auto;
    }
    
    .phone-mockup:hover {
        transform: translateY(-10px);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: flex;
        gap: 12px;
    }

    .nav-links .nav-link {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .guides-container {
        padding: 40px 24px;
    }
    
    .filter-card, .grain-card {
        display: none; /* Hide floating cards on small screens */
    }

    .wiki-header {
        padding: 100px 16px 40px;
    }
    
    .step-card {
        padding: 30px 20px;
    }
    
    .step-number {
        left: -10px;
        top: -15px;
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .nav-container {
        padding: 12px 12px;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .nav-links {
        gap: 8px;
    }

    .nav-icon-link, .icon-btn {
        width: 36px;
        height: 36px;
    }
}

/* Custom Store Buttons */
.btn-patreon {
    background: #FF424D;
    color: white;
    border-color: #FF424D;
    box-shadow: 0 4px 14px 0 rgba(255, 66, 77, 0.39);
    transition: all var(--transition-normal);
}

.btn-patreon:hover {
    background: #FF5A64;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 66, 77, 0.4);
}

.btn-booth {
    background: #99282D;
    color: white;
    border-color: #99282D;
    box-shadow: 0 4px 14px 0 rgba(153, 40, 45, 0.39);
    transition: all var(--transition-normal);
}

.btn-booth:hover {
    background: #B02B33;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(153, 40, 45, 0.4);
}