/* ========================================
   Modern, Refined Corporate Design
   Inspired by: Sequoia, Linear, Vercel
   ======================================== */

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

:root {
    /* Refined Color Palette */
    --color-bg: #ffffff;
    --color-bg-alt: #fafaf9;
    --color-text: #0f172a;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-accent: #0f172a;

    /* Typography - Using Inter for Latin, Noto Sans JP for Japanese */
    --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont,
                 "Segoe UI", "Helvetica Neue", Arial, sans-serif;

    /* Refined Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Container */
    --container-max: 1100px;
}

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'kern' 1, 'liga' 1;
}

/* ========================================
   Container
   ======================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-8);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-5);
    }
}

/* ========================================
   Header
   ======================================== */

.header {
    padding: var(--space-10) 0;
    border-bottom: 1px solid var(--color-border);
}

.logo {
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--color-accent);
}

@media (max-width: 768px) {
    .header {
        padding: var(--space-8) 0;
    }
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    height: 500px;
    overflow: hidden;
    background: linear-gradient(135deg, #fafaf9 0%, #ffffff 100%);
}

.hero-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

@media (max-width: 768px) {
    .hero {
        height: 350px;
    }
}

/* ========================================
   Company Info Section
   ======================================== */

.company-info {
    padding: var(--space-24) 0;
    background-color: var(--color-bg-alt);
}

.section-title {
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-12);
    color: var(--color-text-muted);
}

.info-grid {
    max-width: 50rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-10) var(--space-12);
}

.info-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.info-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.info-value {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text);
    font-weight: 400;
}

.text-secondary {
    display: block;
    margin-top: var(--space-1);
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    font-family: 'Inter', sans-serif;
}

@media (max-width: 768px) {
    .company-info {
        padding: var(--space-20) 0;
    }

    .section-title {
        font-size: 0.75rem;
        margin-bottom: var(--space-8);
    }

    .info-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .info-label {
        font-size: 0.6875rem;
    }

    .info-value {
        font-size: 0.875rem;
    }
}

/* ========================================
   Contact Section
   ======================================== */

.contact {
    padding: var(--space-24) 0;
}

.contact .section-title {
    margin-bottom: var(--space-8);
}

.contact-text {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 38rem;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    padding: var(--space-3) var(--space-6);
    border: 1.5px solid var(--color-border);
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: var(--color-bg);
    letter-spacing: -0.01em;
}

.contact-email:hover {
    border-color: var(--color-accent);
    background-color: var(--color-bg-alt);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.contact-email:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .contact {
        padding: var(--space-20) 0;
    }

    .contact-email {
        font-size: 0.9375rem;
        padding: var(--space-3) var(--space-5);
        width: 100%;
        justify-content: center;
    }
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-12) 0 var(--space-8);
    border-top: 1px solid var(--color-border-light);
}

.footer-text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 400;
    letter-spacing: 0.01em;
}

@media (max-width: 768px) {
    .footer {
        padding: var(--space-10) 0 var(--space-8);
    }

    .footer-text {
        font-size: 0.6875rem;
    }
}

/* ========================================
   Accessibility & Performance
   ======================================== */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}