/* ==========================================================================
   ネコの手 AI - Design System & Modern CSS
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&family=Outfit:wght@400;600;700;800&display=swap');

:root {
    --font-jp: 'Noto Sans JP', sans-serif;
    --font-en: 'Outfit', sans-serif;
    
    /* Core Theme Colors */
    --bg-dark: #090d16;
    --bg-surface: #111827;
    --bg-card: #1f2937;
    --bg-glass: rgba(31, 41, 55, 0.7);
    
    --primary: #f97316;
    --primary-light: #fb923c;
    --primary-dark: #ea580c;
    
    --secondary: #06b6d4;
    --secondary-light: #22d3ee;
    
    --accent-glow: rgba(249, 115, 22, 0.25);
    
    --text-main: #f9fafb;
    --text-sub: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-highlight: rgba(249, 115, 22, 0.4);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --shadow-glow: 0 0 30px rgba(249, 115, 22, 0.2);
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Basic Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography Utility */
.font-en { font-family: var(--font-en); }
.gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Section Common */
.section {
    padding: 5rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3.5rem;
}

.section-badge {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: rgba(249, 115, 22, 0.15);
    border: 1px solid var(--primary);
    color: var(--primary-light);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-sub);
    font-size: 1.05rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(249, 115, 22, 0.6);
}

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    border-color: var(--secondary);
    color: var(--secondary-light);
    transform: translateY(-2px);
}

/* Header Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(9, 13, 22, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--text-main);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

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

/* Hero Section */
.hero {
    padding-top: 150px;
    padding-bottom: 80px;
    background: radial-gradient(circle at 20% 20%, rgba(249, 115, 22, 0.12) 0%, transparent 40%),
                radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.12) 0%, transparent 40%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid var(--secondary);
    border-radius: var(--radius-full);
    color: var(--secondary-light);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.25;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-sub);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.stat-item h4 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-light);
}

.stat-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-img-box {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-highlight);
}

.hero-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.hero-img-box:hover img {
    transform: scale(1.03);
}

/* Pain Points / Problems */
.problem-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    height: 100%;
}

.problem-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.problem-icon {
    width: 50px;
    height: 50px;
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.problem-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

/* Story / Profile Section */
.story-box {
    background: linear-gradient(135deg, var(--bg-surface), var(--bg-card));
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    padding: 3.5rem 3rem;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 3rem;
    align-items: center;
}

.profile-img {
    border-radius: var(--radius-md);
    border: 3px solid var(--primary);
    box-shadow: var(--shadow-card);
}

.story-content h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1.25rem;
}

.story-lead {
    font-size: 1.1rem;
    color: var(--primary-light);
    font-weight: 700;
    margin-bottom: 1rem;
}

.story-text p {
    margin-bottom: 1rem;
    color: var(--text-sub);
}

/* Services Grid */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2.5rem 2rem;
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    border-color: var(--secondary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.15);
}

.service-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    padding: 0.25rem 0.75rem;
    background: rgba(6, 182, 212, 0.15);
    color: var(--secondary-light);
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: var(--radius-full);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    color: var(--primary-light);
}

.service-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.service-list {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-color);
}

.service-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-sub);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.service-list i {
    color: #10b981;
}

/* Simulator Widget */
.simulator-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-card);
}

.sim-control {
    margin-bottom: 2rem;
}

.sim-control label {
    display: block;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

.sim-slider {
    width: 100%;
    accent-color: var(--primary);
    cursor: pointer;
}

.sim-result-box {
    background: var(--bg-dark);
    padding: 2rem;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.sim-result-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-light);
}

/* FAQ Accordion */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active {
    border-color: var(--primary);
}

.faq-question {
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.1rem;
}

.faq-answer {
    padding: 0 2rem 1.5rem;
    color: var(--text-sub);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Contact CTA Banner */
.cta-box {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.2), rgba(6, 182, 212, 0.2));
    border: 1px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-grid, .story-box, .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .hero-title { font-size: 2.3rem; }
    .nav-links { display: none; }
}