/* =====================================================
   AKANUKE LAB - Premium Dark Design System
   Inspired by: fincs.jp
   Design: Minimal, Modern, Sophisticated
   ===================================================== */

/* =====================================================
   1. CSS Variables & Base
   ===================================================== */
:root {
    /* Colors - Deep Black & Electric Blue */
    --bg-primary: #000000;
    --bg-secondary: #050505;
    --bg-tertiary: #0a0a0a;
    --bg-card: rgba(255, 255, 255, 0.02);
    --bg-card-hover: rgba(255, 255, 255, 0.05);
    --bg-glass: rgba(255, 255, 255, 0.03);
    
    --accent-primary: #0066ff;
    --accent-secondary: #0044cc;
    --accent-glow: rgba(0, 102, 255, 0.4);
    --accent-light: #3399ff;
    --accent-gradient: linear-gradient(135deg, #0066ff 0%, #00ccff 100%);
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.4);
    --text-muted: rgba(255, 255, 255, 0.25);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.12);
    --border-accent: rgba(0, 102, 255, 0.3);
    
    /* Typography */
    --font-main: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--accent-glow);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-full);
}

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

::selection {
    background: var(--accent-primary);
    color: var(--text-primary);
}

/* =====================================================
   2. Typography
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.9;
    font-weight: 400;
}

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

strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* =====================================================
   3. Layout
   ===================================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-sm {
    max-width: 960px;
}

.container-lg {
    max-width: 1440px;
}

.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-sm {
    padding: var(--space-2xl) 0;
}

.section-dark {
    background: var(--bg-secondary);
}

/* =====================================================
   4. Header - Glassmorphism
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: transparent;
    transition: var(--transition-base);
}

.header.scrolled {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    z-index: 1001;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: var(--space-xs) 0;
    transition: var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-base);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Menu Button */
.menu-btn {
    display: none;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.menu-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 320px;
    background: rgba(5, 5, 5, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    z-index: 1001;
    transform: translateX(100%);
    transition: var(--transition-base);
    padding: var(--space-xl);
    border-left: 1px solid var(--border-color);
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-base);
}

.mobile-menu-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-base);
}

.mobile-nav-link i {
    width: 24px;
    text-align: center;
    font-size: 1rem;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.mobile-nav-link.active {
    color: var(--accent-primary);
    background: rgba(0, 102, 255, 0.1);
    border: 1px solid var(--border-accent);
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.mobile-overlay.show {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 768px) {
    .nav { display: none; }
    .menu-btn { display: flex; }
}

/* =====================================================
   5. Hero Section - Stunning Visual
   ===================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.hero-gradient-1 {
    width: 800px;
    height: 800px;
    top: -300px;
    right: -200px;
    background: var(--accent-primary);
}

.hero-gradient-2 {
    width: 600px;
    height: 600px;
    bottom: -200px;
    left: -200px;
    background: #0044aa;
    animation-delay: -10s;
}

.hero-gradient-3 {
    width: 400px;
    height: 400px;
    top: 50%;
    left: 50%;
    background: #00ccff;
    opacity: 0.2;
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Grid pattern overlay */
.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black 40%, transparent 100%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    backdrop-filter: blur(10px);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulse-glow 2s infinite;
    box-shadow: 0 0 10px var(--accent-primary);
}

@keyframes pulse-glow {
    0%, 100% { 
        opacity: 1;
        box-shadow: 0 0 10px var(--accent-primary);
    }
    50% { 
        opacity: 0.5;
        box-shadow: 0 0 20px var(--accent-primary);
    }
}

.hero-title {
    margin-bottom: var(--space-lg);
    line-height: 1.1;
}

.hero-title-accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* =====================================================
   6. Buttons - Modern & Interactive
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition-base);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
    color: var(--accent-primary);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1rem;
}

/* =====================================================
   7. Cards - Glassmorphism Style
   ===================================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-light), transparent);
    opacity: 0;
    transition: var(--transition-base);
}

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

.card:hover::before {
    opacity: 1;
}

.card-glow:hover {
    box-shadow: 0 20px 60px -20px var(--accent-glow);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
    box-shadow: 0 10px 30px -10px var(--accent-glow);
}

.card-title {
    font-size: 1.375rem;
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.card-description {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition-base);
}

.card-link:hover {
    gap: var(--space-sm);
    color: var(--accent-light);
}

.card-link i {
    transition: var(--transition-base);
}

.card-link:hover i {
    transform: translateX(4px);
}

/* =====================================================
   8. Grid System
   ===================================================== */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* Tablet */
@media (max-width: 1024px) {
    .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile - すべて1カラムに */
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
    .grid { gap: var(--space-md); }
}

/* =====================================================
   9. Section Headers
   ===================================================== */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-2xl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--accent-primary);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-md);
}

.section-label i {
    font-size: 0.75rem;
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* =====================================================
   10. Stats - Animated Numbers
   ===================================================== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-xl);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat {
    text-align: center;
    padding: var(--space-md);
}

.stat-value {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: var(--space-sm);
    font-weight: 500;
}

/* =====================================================
   11. Footer - Minimal
   ===================================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-2xl) 0;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
}

.footer-nav {
    display: flex;
    gap: var(--space-xl);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-base);
}

.footer-link:hover {
    color: var(--accent-primary);
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =====================================================
   12. Animations - Scroll Reveal
   ===================================================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-scale.visible {
    opacity: 1;
    transform: scale(1);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Hover Effects */
.hover-lift {
    transition: var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-8px);
}

.hover-glow {
    transition: var(--transition-base);
}

.hover-glow:hover {
    box-shadow: 0 0 40px var(--accent-glow);
}

/* Card Glow Effect */
.glow-hover {
    position: relative;
}

.glow-hover::after {
    content: '';
    position: absolute;
    inset: -1px;
    background: var(--accent-gradient);
    border-radius: inherit;
    opacity: 0;
    z-index: -1;
    transition: var(--transition-base);
    filter: blur(20px);
}

.glow-hover:hover::after {
    opacity: 0.3;
}

/* =====================================================
   13. Flow Chart Components
   ===================================================== */

/* Flow Steps Container (for index.html) */
.flow-steps-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.flow-step-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 280px;
}

.flow-step-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.flow-step-label {
    font-size: 0.9375rem;
    font-weight: 600;
}

.flow-step-arrow {
    color: var(--accent-primary);
    font-size: 1rem;
    opacity: 0.6;
}

/* Desktop: horizontal layout */
@media (min-width: 769px) {
    .flow-steps-container {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .flow-step-item {
        flex-direction: column;
        text-align: center;
        padding: 1rem;
        width: auto;
        max-width: none;
    }
    
    .flow-step-icon {
        width: 64px;
        height: 64px;
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }
    
    .flow-step-arrow {
        transform: rotate(-90deg);
    }
}

.flow-stage {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
    transition: var(--transition-base);
}

.flow-stage:hover {
    border-color: var(--border-light);
}

.flow-stage-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.flow-stage-number {
    width: 56px;
    height: 56px;
    background: var(--accent-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: 0 10px 30px -10px var(--accent-glow);
}

.flow-stage-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.flow-stage-subtitle {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.flow-arrow {
    display: flex;
    justify-content: center;
    padding: var(--space-lg) 0;
    color: var(--accent-primary);
    font-size: 2rem;
    animation: bounce-down 2s infinite;
}

@keyframes bounce-down {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50% { transform: translateY(10px); opacity: 1; }
}

.flow-node {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    text-align: center;
    transition: var(--transition-base);
    cursor: pointer;
}

.flow-node:hover {
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
    transform: scale(1.05);
    box-shadow: 0 10px 30px -10px var(--accent-glow);
}

.flow-node-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-sm);
    font-size: 1.25rem;
    transition: var(--transition-base);
}

.flow-node:hover .flow-node-icon {
    background: var(--accent-gradient);
    border-color: transparent;
}

.flow-node-title {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.flow-node-sub {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* =====================================================
   14. Tags & Badges
   ===================================================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.tag:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
}

.tag-blue {
    background: rgba(0, 102, 255, 0.1);
    border-color: var(--border-accent);
    color: var(--accent-light);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =====================================================
   15. Tables
   ===================================================== */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: var(--bg-secondary);
}

.table td {
    font-size: 0.9375rem;
}

.table tbody tr {
    transition: var(--transition-base);
}

.table tbody tr:hover {
    background: var(--bg-card-hover);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* =====================================================
   16. Checklist
   ===================================================== */
.checklist {
    list-style: none;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.checklist-item:last-child {
    border-bottom: none;
}

.checklist-item:hover {
    padding-left: var(--space-sm);
}

.checklist-icon {
    width: 24px;
    height: 24px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    margin-top: 2px;
    box-shadow: 0 4px 10px -4px var(--accent-glow);
}

.checklist-icon.error {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    box-shadow: none;
}

.checklist-text {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* =====================================================
   17. Tabs
   ===================================================== */
.tabs {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-xs);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    min-width: 120px;
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.tab-btn.active {
    background: var(--accent-gradient);
    color: var(--text-primary);
    box-shadow: 0 4px 15px -4px var(--accent-glow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   18. Accordion
   ===================================================== */
.accordion-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.accordion-item:hover {
    border-color: var(--border-light);
}

.accordion-header {
    padding: var(--space-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-base);
    font-weight: 600;
}

.accordion-header:hover {
    background: var(--bg-card-hover);
}

.accordion-header i {
    transition: var(--transition-base);
}

.accordion-item.open .accordion-header i {
    transform: rotate(180deg);
}

.accordion-content {
    padding: 0 var(--space-lg) var(--space-lg);
    color: var(--text-secondary);
    display: none;
}

.accordion-item.open .accordion-content {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   19. Progress Bar
   ===================================================== */
.progress-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* =====================================================
   20. Timeline
   ===================================================== */
.timeline {
    position: relative;
    padding-left: var(--space-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-primary), transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-xl) - 5px);
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--accent-gradient);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--accent-glow);
}

.timeline-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.timeline-content {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* =====================================================
   21. Utilities
   ===================================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.py-sm { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-md { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-lg { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }

.px-sm { padding-left: var(--space-sm); padding-right: var(--space-sm); }
.px-md { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-lg { padding-left: var(--space-lg); padding-right: var(--space-lg); }

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.border { border: 1px solid var(--border-color); }
.border-accent { border-color: var(--border-accent); }

.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-card { background: var(--bg-card); }
.bg-gradient { background: var(--accent-gradient); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-glow { box-shadow: var(--shadow-glow); }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* =====================================================
   Mobile First - Responsive Utilities
   ===================================================== */
@media (max-width: 768px) {
    .md\:hidden { display: none !important; }
    .md\:block { display: block !important; }
    
    /* セクション余白調整 */
    .section {
        padding: var(--space-xl) 0;
    }
    
    .section-sm {
        padding: var(--space-lg) 0;
    }
    
    /* コンテナパディング */
    .container {
        padding: 0 var(--space-md);
    }
    
    /* タイポグラフィ調整 */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.125rem; }
    
    .hero-description {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .section-header {
        margin-bottom: var(--space-xl);
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    /* カード調整 */
    .card {
        padding: var(--space-lg);
    }
    
    .card-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
        margin-bottom: var(--space-md);
    }
    
    .card-title {
        font-size: 1.125rem;
    }
    
    /* ボタン調整 */
    .btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.875rem;
        width: 100%;
        justify-content: center;
    }
    
    .btn-lg {
        padding: var(--space-md) var(--space-xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    /* Stats調整 */
    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    /* フロー関連 */
    .flow-stage {
        padding: var(--space-lg);
    }
    
    .flow-stage-header {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    .flow-stage-number {
        width: 44px;
        height: 44px;
        font-size: 1.125rem;
    }
    
    .flow-node {
        padding: var(--space-sm);
    }
    
    .flow-node-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .flow-node-title {
        font-size: 0.75rem;
    }
    
    .flow-node-sub {
        font-size: 0.625rem;
    }
    
    /* テーブル調整 */
    .table th,
    .table td {
        padding: var(--space-sm);
        font-size: 0.8125rem;
    }
    
    /* 余白ユーティリティ */
    .mb-xl { margin-bottom: var(--space-lg); }
    .mb-2xl { margin-bottom: var(--space-xl); }
    .mt-xl { margin-top: var(--space-lg); }
    .mt-2xl { margin-top: var(--space-xl); }
    
    br.md\:hidden { display: none; }
}

@media (max-width: 480px) {
    .sm\:hidden { display: none !important; }
    .sm\:block { display: block !important; }
    
    /* より小さい画面 */
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.375rem; }
    
    .container {
        padding: 0 var(--space-sm);
    }
    
    .card {
        padding: var(--space-md);
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
}

/* =====================================================
   22. Special Effects
   ===================================================== */
/* Noise texture overlay */
.noise-overlay::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.02;
    pointer-events: none;
    z-index: 9999;
}

/* Cursor glow effect */
.cursor-glow {
    position: fixed;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
}

/* Divider */
.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-light), transparent);
    margin: var(--space-xl) 0;
}

/* =====================================================
   23. Page Specific Styles
   ===================================================== */
/* Funnel specific */
.funnel-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
}

/* Persona cards */
.persona-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: var(--transition-base);
}

.persona-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.persona-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    box-shadow: 0 10px 30px -10px var(--accent-glow);
}

/* Category filter buttons */
.category-btn {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.category-btn:hover {
    border-color: var(--border-light);
    color: var(--text-primary);
}

.category-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: var(--text-primary);
}

/* Entry card for strategy page */
.entry-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
}

.entry-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -20px var(--accent-glow);
}

/* Quick links */
.quick-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.quick-link:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateX(8px);
}

.quick-link-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

/* =====================================================
   24. Print Styles
   ===================================================== */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .header, .footer, .mobile-menu, .mobile-overlay {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .card {
        break-inside: avoid;
        border: 1px solid #ddd;
    }
}