/* ==========================================================================
   gigaraku.com | Design System & Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Color Tokens & Theme Variables
   -------------------------------------------------------------------------- */
:root {
    /* Color Palette */
    --bg-dark: #070c18;
    --bg-surface: #0f172a;
    --bg-card: rgba(15, 23, 42, 0.65);
    --bg-card-hover: rgba(30, 41, 59, 0.8);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Brand Colors */
    --tech-blue: #2563eb;
    --tech-blue-light: #3b82f6;
    --tech-blue-glow: rgba(37, 99, 235, 0.35);
    
    --accent-orange: #f97316;
    --accent-orange-light: #ff7849;
    --accent-orange-glow: rgba(249, 115, 22, 0.35);
    
    --sage-green: #10b981;
    --sage-green-light: #34d399;
    --sage-green-glow: rgba(16, 185, 129, 0.35);

    /* Glassmorphism Defaults */
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-hover: rgba(255, 255, 255, 0.25);
    --glass-blur: blur(16px);
    
    /* Layout & Geometry */
    --container-width: 1200px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & General Setup
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Outfit', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

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

ul {
    list-style: none;
}

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

/* --------------------------------------------------------------------------
   3. Background Lights & Patterns
   -------------------------------------------------------------------------- */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: -2;
    opacity: 0.45;
}

.bg-glow-1 {
    top: -10%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--tech-blue-glow) 0%, transparent 70%);
}

.bg-glow-2 {
    top: 40%;
    right: -10%;
    width: 55vw;
    height: 55vw;
    background: radial-gradient(circle, var(--accent-orange-glow) 0%, transparent 70%);
}

.bg-grid-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   4. Layout & Containers
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 7rem 0;
}

.section-header {
    margin-bottom: 4rem;
}

.section-subtitle {
    display: inline-block;
    font-family: 'Outfit', sans-serif;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-orange);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 680px;
}

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

.text-center .section-description {
    margin: 0 auto;
}

/* Glassmorphism Card Utility */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

/* --------------------------------------------------------------------------
   5. Buttons & Badges
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 1.1rem 2.25rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--tech-blue) 0%, var(--accent-orange) 100%);
    color: #ffffff;
    box-shadow: 0 8px 25px var(--tech-blue-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(249, 115, 22, 0.4);
    filter: brightness(1.1);
}

.btn-glass {
    background: var(--glass-bg);
    border-color: var(--glass-border);
    color: var(--text-primary);
    backdrop-filter: var(--glass-blur);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--glass-border-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border-color: var(--glass-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--tech-blue);
    color: var(--tech-blue-light);
    background: rgba(37, 99, 235, 0.1);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(37, 99, 235, 0.12);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--tech-blue-light);
    margin-bottom: 1.5rem;
}

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

/* --------------------------------------------------------------------------
   6. Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1.25rem 0;
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    padding: 0.8rem 0;
    background: rgba(7, 12, 24, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-text-giga {
    color: var(--text-primary);
}

.logo-text-raku {
    background: linear-gradient(135deg, var(--tech-blue-light), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-dot {
    font-size: 1.1rem;
    color: var(--accent-orange);
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: width var(--transition-normal);
}

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

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

/* --------------------------------------------------------------------------
   7. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
    padding-top: 10rem;
    padding-bottom: 4rem;
    position: relative;
}

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

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -1px;
    margin-bottom: 1.5rem;
}

.highlight-orange {
    color: var(--accent-orange);
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2.25rem;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.85rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-visual {
    position: relative;
}

.visual-card-wrapper {
    position: relative;
}

.visual-card {
    padding: 0.75rem;
    overflow: hidden;
    position: relative;
}

.hero-img {
    width: 100%;
    height: auto;
    border-radius: calc(var(--radius-lg) - 4px);
}

.visual-overlay-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1.1rem;
    background: rgba(7, 12, 24, 0.85);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

.badge-top-right {
    top: 1.5rem;
    right: 1.5rem;
}

.badge-bottom-left {
    bottom: 1.5rem;
    left: 1.5rem;
}

.text-orange { color: var(--accent-orange); }
.text-green { color: var(--sage-green); }
.text-blue { color: var(--tech-blue-light); }

/* --------------------------------------------------------------------------
   8. Concept Banner Section (New Specific Concept Design)
   -------------------------------------------------------------------------- */
.concept-banner-section {
    padding: 3rem 0 5rem;
}

.concept-box {
    padding: 3.5rem 3rem;
    text-align: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    position: relative;
}

.concept-badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 2px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--accent-orange);
    margin-bottom: 1.25rem;
}

.concept-equation {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.5px;
}

.giga-highlight {
    color: var(--tech-blue-light);
    text-shadow: 0 0 20px var(--tech-blue-glow);
}

.raku-highlight {
    color: var(--accent-orange);
    text-shadow: 0 0 20px var(--accent-orange-glow);
}

.math-op {
    color: var(--text-muted);
    margin: 0 0.5rem;
}

.concept-sub-equation {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.concept-quote-jp {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    background: rgba(7, 12, 24, 0.6);
    border-left: 4px solid var(--accent-orange);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    max-width: 800px;
    margin: 0 auto;
}

.quote-icon {
    font-size: 1.5rem;
    color: var(--accent-orange);
}

.concept-quote-jp p {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.7;
    margin: 0;
}

/* --------------------------------------------------------------------------
   9. Stats Banner
   -------------------------------------------------------------------------- */
.stats-banner {
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.4);
    padding: 2.5rem 0;
}

.stats-container {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-family: 'Outfit', sans-serif;
    font-size: 2.25rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 0.4rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

/* --------------------------------------------------------------------------
   10. About Section
   -------------------------------------------------------------------------- */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.about-card {
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.bg-blue-light { background: rgba(37, 99, 235, 0.15); color: var(--tech-blue-light); }
.bg-green-light { background: rgba(16, 185, 129, 0.15); color: var(--sage-green); }
.bg-orange-light { background: rgba(249, 115, 22, 0.15); color: var(--accent-orange); }

.about-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   11. Focus Section
   -------------------------------------------------------------------------- */
.focus-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.focus-card {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.focus-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.focus-number {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.1);
    line-height: 1;
}

.focus-badge {
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(37, 99, 235, 0.2);
    color: var(--tech-blue-light);
}

.badge-green { background: rgba(16, 185, 129, 0.2); color: var(--sage-green); }
.badge-orange { background: rgba(249, 115, 22, 0.2); color: var(--accent-orange); }

.focus-icon-box {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
}

.focus-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.focus-card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.focus-list {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.focus-list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* --------------------------------------------------------------------------
   12. Insights Section
   -------------------------------------------------------------------------- */
.insights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.insight-card {
    padding: 2rem;
}

.insight-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.insight-tag {
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(37, 99, 235, 0.2);
    color: var(--tech-blue-light);
}

.tag-green { background: rgba(16, 185, 129, 0.2); color: var(--sage-green); }
.tag-orange { background: rgba(249, 115, 22, 0.2); color: var(--accent-orange); }

.insight-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.insight-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

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

/* --------------------------------------------------------------------------
   13. CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
    padding: 5rem 0;
}

.cta-box {
    padding: 4.5rem 2rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(249, 115, 22, 0.15) 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.cta-box h2 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-box p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background: #040810;
    border-top: 1px solid var(--glass-border);
    padding: 5rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3.5rem;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 1rem;
    max-width: 320px;
}

.footer-links h4, .footer-social h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

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

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--accent-orange);
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-icons a:hover {
    background: var(--accent-orange);
    color: #ffffff;
    border-color: var(--accent-orange);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   15. Modal & Form Styles
   -------------------------------------------------------------------------- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(4, 8, 16, 0.85);
    backdrop-filter: blur(12px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: 1.5rem;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    max-width: 520px;
    width: 100%;
    padding: 3rem 2.5rem;
    position: relative;
    background: #0f172a;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-header {
    margin-bottom: 2rem;
}

.modal-header h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--tech-blue-light);
}

.btn-block {
    width: 100%;
}

.form-status {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.9rem;
}

.form-status.success { color: var(--sage-green); }
.form-status.error { color: #ef4444; }

/* --------------------------------------------------------------------------
   16. Animations & Keyframes
   -------------------------------------------------------------------------- */
@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
    100% { transform: scale(1); opacity: 1; }
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }
.delay-4 { transition-delay: 0.6s; }

/* --------------------------------------------------------------------------
   17. Media Queries & Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .about-grid, .focus-cards, .insights-grid {
        grid-template-columns: 1fr;
    }

    .concept-equation {
        font-size: 2.2rem;
    }

    .stat-divider {
        display: none;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        padding: 6rem 2rem;
        transition: right var(--transition-normal);
    }

    .main-nav.active {
        right: 0;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
    }

    .mobile-toggle {
        display: flex;
        z-index: 101;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }

    .hero-title {
        font-size: 2rem;
    }

    .concept-box {
        padding: 2.5rem 1.5rem;
    }

    .concept-quote-jp {
        flex-direction: column;
        text-align: center;
        border-left: none;
        border-top: 3px solid var(--accent-orange);
        border-radius: 0 0 var(--radius-md) var(--radius-md);
    }
}