/* ============================================
   Ta-BiT Inc. Corporate Website
   Base stylesheet - customize with Claude Code
   ============================================ */

:root {
  /* Color tokens - TODO: finalize with Claude Code */
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-border: #2a2a2a;
  --color-text: #e0e0e0;
  --color-text-muted: #888888;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;

  /* Typography */
  --font-body: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  --font-logo: "Courier New", monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  /* Layout */
  --max-width: 960px;
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Header */
.header {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  font-family: var(--font-logo);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text);
}

.logo-sub {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* Hero */
.hero {
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero-tagline {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* Sections */
section {
  padding: var(--space-lg) 0;
}

h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: 0.05em;
}

/* Services */
.service-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.service-item {
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.service-item h3 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.service-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Company Info Table */
.company-info {
  width: 100%;
  border-collapse: collapse;
}

.company-info th,
.company-info td {
  padding: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
  font-size: 0.9rem;
}

.company-info th {
  width: 120px;
  color: var(--color-text-muted);
  font-weight: 400;
  white-space: nowrap;
}

.company-info td ul {
  list-style: none;
  padding: 0;
}

.company-info td ul li {
  margin-bottom: 0.25rem;
}

.company-info td ul li::before {
  content: "–";
  margin-right: 0.5rem;
  color: var(--color-text-muted);
}

.company-info td p + p {
  margin-top: 0.5rem;
}

/* Contact */
.contact {
  text-align: center;
}

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

.contact-email {
  margin-top: var(--space-md);
}

.contact-email a {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.contact-email a:hover {
  color: var(--color-accent-hover);
}

/* Footer */
.footer {
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-nav {
  margin-top: var(--space-xs);
}

.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.75rem;
}

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

/* Responsive */
@media (max-width: 640px) {
  :root {
    --space-lg: 2.5rem;
    --space-xl: 4rem;
  }

  .hero-tagline {
    font-size: 1.2rem;
  }

  .company-info th {
    display: block;
    width: 100%;
    padding-bottom: 0;
    border-bottom: none;
  }

  .company-info td {
    display: block;
    padding-top: 0.25rem;
  }
}