/* ============================================
   Minpaku Lab. - Premium Landing Page Styles
   Theme: Minimal Modern Art & Intelligent
   ============================================ */

/* ============================================
   CSS Variables & Design System
   ============================================ */
:root {
    /* Color Palette - Light Theme */
    --color-bg-primary: #fafaf9;
    --color-bg-secondary: #f5f5f4;
    --color-text-primary: #1c1917;
    --color-text-secondary: #57534e;
    --color-gold: #d4af37;
    --color-border: #e7e5e4;
    --color-accent-dark: #292524;
    
    /* Typography */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;
    
    /* Transitions */
    --transition-smooth: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.3s ease;
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3 {
    font-family: var(--font-serif);
    font-weight: 300;
    letter-spacing: 0.05em;
    line-height: 1.4;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(250, 250, 249, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
}

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

.header-logo {
    height: 40px;
    width: auto;
    transition: var(--transition-fast);
}

.header-logo:hover {
    opacity: 0.8;
}

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

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

/* ============================================
   Animation Classes
   ============================================ */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease, transform 1s ease;
}

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

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    padding-top: 80px; /* Header height offset */
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1200px;
    padding: var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 300;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-line {
    display: block;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1.2s ease forwards;
    opacity: 0;
}

.hero-line:nth-child(1) {
    animation-delay: 0.3s;
}

.hero-line:nth-child(2) {
    animation-delay: 0.6s;
}

.hero-line:nth-child(3) {
    animation-delay: 0.9s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(30px);
    }
}

.hero-subtitle {
    font-size: clamp(0.875rem, 1.5vw, 1.125rem);
    font-weight: 300;
    letter-spacing: 0.15em;
    color: var(--color-gold);
    text-transform: uppercase;
    animation: fadeInUp 1.2s ease forwards;
    animation-delay: 1.2s;
    opacity: 0;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    z-index: 2;
    animation: fadeInUp 1.2s ease forwards;
    animation-delay: 1.5s;
    opacity: 0;
}

.scroll-text {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-text-secondary);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gold), transparent);
    animation: scrollLineMove 2s ease-in-out infinite;
}

@keyframes scrollLineMove {
    0%, 100% {
        transform: translateY(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateY(20px);
    }
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.section-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 300;
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    letter-spacing: 0.05em;
}

/* ============================================
   Market Analysis Section
   ============================================ */
.market-section {
    background-color: var(--color-bg-primary);
    position: relative;
}

.market-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 100px;
    background: linear-gradient(to bottom, transparent, var(--color-gold));
}

.market-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.stat-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s ease;
}

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

.stat-card:hover {
    background: #ffffff;
    border-color: var(--color-gold);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.stat-visual {
    width: 100%;
    height: 120px;
    margin-bottom: var(--spacing-md);
}

.stat-graph {
    width: 100%;
    height: 100%;
}

.graph-line {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawLine 2s ease forwards;
}

@keyframes drawLine {
    to {
        stroke-dashoffset: 0;
    }
}

.stat-number {
    font-size: clamp(3rem, 5vw, 4.5rem);
    font-weight: 300;
    color: var(--color-gold);
    line-height: 1;
    font-family: var(--font-serif);
    letter-spacing: 0.05em;
}

.stat-unit {
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    color: var(--color-gold);
    margin-bottom: var(--spacing-sm);
    font-weight: 300;
}

.stat-label {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.stat-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    letter-spacing: 0.02em;
}

/* ============================================
   Solution Section
   ============================================ */
.solution-section {
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.solution-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.solution-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease, transform 1s ease;
}

.solution-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.solution-item-reverse {
    direction: rtl;
}

.solution-item-reverse > * {
    direction: ltr;
}

.solution-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1/1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.solution-illustration {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.minimal-icon {
    width: 70%;
    height: 70%;
    transition: var(--transition-smooth);
}

.solution-item:hover .solution-illustration {
    background: #ffffff;
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.15);
    transform: scale(1.05);
}

.solution-item:hover .minimal-icon {
    transform: scale(1.1);
}

/* SVG Animation */
.minimal-icon circle,
.minimal-icon line,
.minimal-icon polyline,
.minimal-icon path,
.minimal-icon rect,
.minimal-icon ellipse {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawSVG 2s ease forwards;
}

@keyframes drawSVG {
    to {
        stroke-dashoffset: 0;
    }
}

.solution-item.visible .minimal-icon circle,
.solution-item.visible .minimal-icon line,
.solution-item.visible .minimal-icon polyline,
.solution-item.visible .minimal-icon path,
.solution-item.visible .minimal-icon rect,
.solution-item.visible .minimal-icon ellipse {
    animation: drawSVG 2s ease forwards;
}

.solution-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
    filter: grayscale(0%) contrast(1.05);
    display: none; /* Hide images as we're using illustrations */
}

.solution-item:hover .solution-image img {
    transform: scale(1.05);
}

.solution-content {
    padding: var(--spacing-md);
}

.solution-number {
    font-size: 1rem;
    color: var(--color-gold);
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-sm);
    font-weight: 300;
}

.solution-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

.solution-description {
    font-size: clamp(1rem, 1.2vw, 1.125rem);
    line-height: 2;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

.solution-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.solution-features li {
    position: relative;
    padding-left: var(--spacing-md);
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    letter-spacing: 0.02em;
}

.solution-features li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-gold);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    background: var(--color-bg-secondary);
    position: relative;
    text-align: center;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-gold), transparent);
}

.cta-content {
    max-width: 900px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
    letter-spacing: 0.05em;
}

.cta-description {
    font-size: clamp(1rem, 1.2vw, 1.125rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 2;
    letter-spacing: 0.02em;
}

.cta-button {
    display: inline-block;
    padding: 1.25rem 3rem;
    background: transparent;
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    font-family: var(--font-sans);
    text-decoration: none;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-gold);
    transition: left 0.6s ease;
    z-index: -1;
}

.cta-button:hover {
    color: #ffffff;
}

.cta-button:hover::before {
    left: 0;
}

.cta-note {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.05em;
}

/* Contact Information */
.contact-info {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.contact-email {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: var(--color-gold);
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: var(--transition-fast);
    position: relative;
}

.contact-email::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--color-gold);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s ease;
}

.contact-email:hover {
    opacity: 0.8;
}

.contact-email:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-accent-dark);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
    color: #f5f5f4;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-logo {
    font-size: 1.5rem;
    font-family: var(--font-serif);
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--color-gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.footer-copyright {
    font-size: 0.875rem;
    color: #a8a29e;
    letter-spacing: 0.05em;
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-2xl: 5rem;
    }
    
    .solution-item,
    .solution-item-reverse {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        direction: ltr;
    }
    
    .solution-image {
        order: -1;
        aspect-ratio: 1/1;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .market-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* Mobile */
@media (max-width: 640px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-2xl: 4rem;
    }
    
    html {
        font-size: 14px;
    }
    
    .header-logo {
        height: 32px;
    }
    
    .hero-section {
        padding-top: 70px;
    }
    
    .hero-title {
        letter-spacing: 0.05em;
    }
    
    .hero-line {
        margin-bottom: var(--spacing-sm);
    }
    
    .section-padding {
        padding: var(--spacing-xl) 0;
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .solution-content {
        padding: 0;
    }
    
    .solution-grid {
        gap: var(--spacing-xl);
    }
    
    .solution-image {
        max-width: 250px;
    }
    
    .minimal-icon {
        width: 80%;
        height: 80%;
    }
    
    .cta-button {
        padding: 1rem 2rem;
        width: 100%;
        max-width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* High Resolution */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .scroll-indicator {
        display: none;
    }
    
    .hero-canvas {
        display: none;
    }
}