/* ==========================================================================
   ITI monogatari | Official Teaser LP Minimal Stylesheet
   Design Approach: Minimal Editorial & Modern Japanese Typography
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-primary: #FAF9F5;
  --bg-card: #FFFFFF;
  --text-main: #1C1E21;
  --text-muted: #55585D;
  --text-subtle: #84878D;
  --border-subtle: #E6E3D8;
  --accent-terra: #B85D3B;
  --accent-navy: #1B365D;
  --accent-green: #2E7D32;

  /* Typography */
  --font-serif: "Shippori Mincho", "Noto Serif JP", serif;
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-en: "Plus Jakarta Sans", var(--font-sans);

  /* Spacing */
  --container-width: 860px;
}

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

html {
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  line-height: 1.85;
  letter-spacing: 0.03em;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  padding: 32px 0;
  border-bottom: 1px solid var(--border-subtle);
  background-color: rgba(250, 249, 245, 0.95);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
}

.brand-logo {
  height: 52px;
  width: auto;
  display: block;
  object-fit: contain;
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.site-main {
  flex: 1;
  padding: 80px 0 100px 0;
}

.main-article {
  display: flex;
  flex-direction: column;
  gap: 64px;
}

.divider {
  border: 0;
  height: 1px;
  background-color: var(--border-subtle);
  margin: 0;
}

/* Vision Section */
.vision-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section-lead-label {
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-terra);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.vision-statement {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--text-main);
  margin-bottom: 12px;
}

.statement-body {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 2.1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.statement-notice {
  font-size: 0.95rem;
  color: var(--text-main);
  background-color: #F2EFE9;
  padding: 16px 20px;
  border-left: 3px solid var(--accent-navy);
  margin-top: 8px;
}

/* Sub Headings */
.sub-heading {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.sub-lead {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* Notice & Contact Section */
.notice-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.notice-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.9;
}

.contact-box {
  margin-top: 12px;
  display: inline-flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 24px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  width: fit-content;
}

.contact-label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-subtle);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-email {
  font-family: var(--font-en);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-terra);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: opacity 0.2s ease;
}

.contact-email:hover {
  opacity: 0.75;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  background-color: #FAF9F5;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-subtle);
  gap: 16px;
  flex-wrap: wrap;
}

.footer-company {
  font-weight: 500;
  color: var(--text-muted);
}

.footer-copy {
  font-family: var(--font-en);
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .brand-logo {
    height: 42px;
  }

  .site-main {
    padding: 56px 0 72px 0;
  }

  .main-article {
    gap: 48px;
  }

  .contact-box {
    width: 100%;
    flex-direction: column;
    gap: 6px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .sp-break {
    display: inline;
  }
}

@media (min-width: 769px) {
  .sp-break {
    display: none;
  }
}