/* Echo Valley Media — Corporate Site
 * v0.1 ミニマル初稿
 */

:root {
  --color-bg: #fbf9f5;
  --color-surface: #ffffff;
  --color-text: #2a2a2a;
  --color-text-muted: #5f5f5f;
  --color-primary: #1e3a5f;
  --color-primary-hover: #15294a;
  --color-accent: #c89456;
  --color-border: #e6e1d8;
  --max-width: 1080px;
  --font-jp: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Meiryo", sans-serif;
  --font-en: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-jp);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: var(--color-primary-hover);
}

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

/* ===== Header ===== */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand a {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
  color: var(--color-text);
}

.brand-mark {
  font-family: var(--font-en);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.brand-sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.18em;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

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

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

/* ===== Hero ===== */
.hero {
  padding: 6rem 1.5rem 5rem;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(251,249,245,0) 0%, rgba(251,249,245,1) 100%),
    radial-gradient(ellipse at center top, rgba(30,58,95,0.06) 0%, transparent 60%);
}

.hero-tagline {
  font-family: var(--font-en);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem;
  color: var(--color-primary);
}

.hero-tagline-jp {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 500;
  letter-spacing: 0.08em;
  margin: 0 0 2rem;
  color: var(--color-text);
}

.hero-lead {
  max-width: 640px;
  margin: 0 auto;
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 2;
}

/* ===== Section ===== */
.section {
  padding: 4.5rem 1.5rem;
}

.section.alt {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-heading {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.5rem;
  text-align: center;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 0 3rem;
  text-align: center;
}

/* ===== Business cards ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(30,58,95,0.08);
}

.card-label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  margin: 0 0 0.75rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
  color: var(--color-text);
}

.card-tagline {
  font-style: italic;
  color: var(--color-primary);
  margin: 0 0 1rem;
  font-size: 0.95rem;
}

.card-desc {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin: 0 0 1.5rem;
  flex: 1;
}

.card-link {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  align-self: flex-start;
}

.card-link::after {
  content: " →";
  transition: margin-left 0.2s ease;
}

.card-link:hover::after {
  margin-left: 0.25rem;
}

/* ===== Values list ===== */
.values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  max-width: 820px;
  margin: 0 auto;
}

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

.value-label {
  font-family: var(--font-en);
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}

.value-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ===== About / generic prose ===== */
.prose {
  max-width: 760px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 2;
  color: var(--color-text);
}

.prose h2 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 3rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.prose h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--color-primary);
}

.prose p {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
}

.prose ul,
.prose ol {
  padding-left: 1.5rem;
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
}

.prose li {
  margin: 0 0 0.5rem;
}

.prose .lead {
  font-size: 1.1rem;
  color: var(--color-text);
}

.prose dl {
  margin: 0;
  display: grid;
  grid-template-columns: 8em 1fr;
  gap: 0.5rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.prose dt {
  color: var(--color-text);
  font-weight: 500;
}

.prose dd {
  margin: 0;
}

/* ===== Page header (sub pages) ===== */
.page-header {
  padding: 4rem 1.5rem 2.5rem;
  text-align: center;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-header-label {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.5rem;
}

.page-header-title {
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0;
}

/* ===== Footer ===== */
.site-footer {
  background-color: #f1ede5;
  padding: 3.5rem 1.5rem 2rem;
  border-top: 1px solid var(--color-border);
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-brand .brand-mark {
  font-size: 1.2rem;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0.75rem 0 0;
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text);
  margin: 0 0 0.85rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin: 0 0 0.5rem;
  font-size: 0.88rem;
}

.footer-col a {
  color: var(--color-text-muted);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 2.5rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.footer-bottom .footer-oripa {
  font-size: 0.78rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .nav ul {
    gap: 1.25rem;
  }

  .hero {
    padding: 4rem 1.5rem 3.5rem;
  }

  .section {
    padding: 3.5rem 1.5rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
  }

  .prose dl {
    grid-template-columns: 1fr;
    gap: 0.25rem 0;
  }

  .prose dt {
    margin-top: 0.75rem;
  }
}