/* ========================================
   Mayone Co., Ltd. — Company Website
   Design System & Styles
   ======================================== */

:root {
    /* Neutral palette — clean, professional, tech-forward */
    --bg: #0b0b0f;
    --bg-elevated: #121217;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --text-tertiary: #48484a;

    --accent: #2563eb;
    --accent-hover: #3b82f6;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
    --duration: 0.35s;
}

/* ===== Reset ===== */
*, *::before, *::after {
    margin: 0; padding: 0;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }

/* ===== Typography ===== */
.eyebrow {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}

h1, h2, h3 {
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.15;
    color: var(--text-primary);
}

h2 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 20px; }
h3 { font-size: 1.2rem; margin-bottom: 8px; }

.body-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    max-width: 560px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 520px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: all var(--duration) var(--ease);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-sm { padding: 8px 18px; font-size: 0.9rem; }
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn:not(.btn-sm):not(.btn-lg) { padding: 12px 24px; }

.btn-primary {
    background: var(--text-primary);
    color: var(--bg);
}
.btn-primary:hover { background: #d1d1d6; }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--border-hover); }

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-outline:hover { background: rgba(255,255,255,0.05); border-color: var(--border-hover); }

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: all var(--duration) var(--ease);
}

.navbar.scrolled {
    background: rgba(11, 11, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.nav-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo img, .logo svg { height: 40px; width: auto; }
.logo-text { font-weight: 700; font-size: 1.3rem; letter-spacing: -0.02em; }

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--duration) var(--ease);
}
.nav-links a:hover { color: var(--text-primary); }

.mobile-menu-btn {
    display: none;
    background: none; border: none; cursor: pointer;
    flex-direction: column; gap: 5px;
}
.mobile-menu-btn span {
    width: 22px; height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--duration) var(--ease);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    max-width: 1120px;
    margin: 0 auto;
}

.hero-inner { max-width: 720px; }

.hero-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-tertiary);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
}

.hero-title em {
    font-style: italic;
    background: linear-gradient(135deg, var(--accent), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions { display: flex; gap: 12px; justify-content: center; }

.hero-scroll-hint {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px; height: 48px;
    background: linear-gradient(to bottom, var(--text-tertiary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* ===== Section Grid (Text + Image) ===== */
.section-grid {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}
.section-grid.reverse { direction: rtl; }
.section-grid.reverse > * { direction: ltr; }

.section-image img {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

/* ===== About Stats ===== */
.about-section { padding: 120px 0; }

.stats-row {
    max-width: 1120px;
    margin: 80px auto 0;
    padding: 40px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    gap: 32px;
    flex-wrap: wrap;
}

.stat { text-align: center; flex: 1; min-width: 140px; }
.stat-value {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.stat-divider {
    width: 1px; height: 48px;
    background: var(--border);
}

/* ===== Expertise ===== */
.expertise-section {
    padding: 120px 24px;
    max-width: 1120px;
    margin: 0 auto;
}

.section-header { margin-bottom: 56px; }

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.expertise-card {
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--duration) var(--ease);
}

.expertise-card:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-2px);
}

.card-icon {
    width: 56px; height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
    color: var(--accent);
    margin-bottom: 20px;
}

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

/* ===== Products ===== */
.products-section {
    padding: 120px 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.product-list { margin-top: 32px; }

.product-item {
    display: flex;
    align-items: baseline;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.product-item:first-child { border-top: 1px solid var(--border); }

.product-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    min-width: 120px;
}

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

/* ===== Culture / Values ===== */
.culture-section {
    padding: 120px 24px;
    max-width: 1120px;
    margin: 0 auto;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.value-card {
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--duration) var(--ease);
}

.value-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.value-number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-tertiary);
    display: block;
    margin-bottom: 24px;
}

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

/* ===== Contact CTA ===== */
.contact-section {
    padding: 120px 24px;
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.contact-card h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
    line-height: 1.7;
}

.contact-actions { display: flex; justify-content: center; gap: 12px; }

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--border);
    padding: 64px 24px 32px;
    background: var(--bg);
}

.footer-inner {
    max-width: 1120px;
    margin: 0 auto;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 64px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.footer-brand { max-width: 280px; }
.footer-logo-svg { height: 36px; margin-bottom: 12px; }
.footer-tagline { font-size: 0.9rem; color: var(--text-tertiary); }

.footer-nav { display: flex; gap: 64px; }

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.footer-col a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--duration) var(--ease);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Legal Pages (Privacy & Terms) ===== */
.legal-page {
    padding: 140px 24px 80px;
    max-width: 800px;
    margin: 0 auto;
}
.legal-content {
    padding: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
.legal-content h1 { font-size: 2.2rem; margin-bottom: 12px; }
.legal-content h2 { font-size: 1.2rem; margin-top: 32px; margin-bottom: 12px; }
.legal-content p, .legal-content li {
    color: var(--text-secondary);
    margin-bottom: 14px;
    font-size: 0.95rem;
    line-height: 1.8;
}
.legal-content ul { margin-left: 20px; margin-bottom: 20px; }
.last-updated {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 36px !important;
    display: block;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .section-grid { grid-template-columns: 1fr; gap: 40px; }
    .section-grid.reverse { direction: ltr; }
    .expertise-grid { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: 1fr; }
    .footer-nav { flex-wrap: wrap; gap: 40px; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        background: rgba(11,11,15,0.97);
        backdrop-filter: blur(20px);
        padding: 24px;
        border-bottom: 1px solid var(--border);
        gap: 16px;
    }
    .mobile-menu-btn { display: flex; }
    .hero-title { font-size: 2.5rem; }
    .stats-row { flex-direction: column; gap: 24px; text-align: center; }
    .stat-divider { width: 80px; height: 1px; }
    .footer-top { flex-direction: column; gap: 40px; }
    .footer-nav { flex-direction: column; gap: 32px; }
    .contact-actions { flex-direction: column; }
    .hero-scroll-hint { display: none; }
    .legal-content { padding: 28px; }
}