/* ============================================
   林業芸術社 — 共通スタイルシート
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&display=swap');

:root {
  --color-forest: #025a34;
  --color-forest-deep: #023f26;
  --color-maroon: #4b1817;
  --color-paper: #faf8f4;
  --color-paper-dim: #b8dcd9;
  --color-ink: #1f2420;
  --color-moss: #7c8b6f;
  --color-ochre: #b8860b;
  --color-line: rgba(31, 36, 32, 0.12);

  --font-jp: 'Noto Sans JP', 'Hiragino Sans', sans-serif;

  --container-w: 1120px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
  --space-7: 140px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.9;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* ---------- ヘッダー / ナビ ---------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background: rgba(250, 248, 244, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-line);
}

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

.brand-lockup img {
  height: 44px;
  width: auto;
  display: block;
}

.hamburger {
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  position: fixed;
  top: 12px;
  right: var(--space-3);
  z-index: 200;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-ink);
  margin: 6px auto;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.nav-panel {
  position: fixed;
  top: 0; right: 0;
  height: 100%;
  width: min(340px, 84vw);
  background: var(--color-forest);
  color: var(--color-paper);
  z-index: 150;
  padding: var(--space-6) var(--space-4) var(--space-4);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.nav-panel.is-open { transform: translateX(0); }

.nav-panel a {
  display: block;
  font-size: 17px;
  font-weight: 500;
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(250, 248, 244, 0.16);
  letter-spacing: 0.03em;
}

.nav-panel .nav-current { color: var(--color-ochre); }

.nav-scrim {
  position: fixed;
  inset: 0;
  background: rgba(31, 36, 32, 0.4);
  z-index: 140;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav-scrim.is-open { opacity: 1; pointer-events: auto; }

/* ---------- ヒーロー ---------- */

.hero {
  padding: 180px var(--space-3) var(--space-6);
  background:
    radial-gradient(circle at 82% 18%, rgba(2, 90, 52, 0.10), transparent 55%),
    radial-gradient(circle at 12% 92%, rgba(75, 24, 23, 0.08), transparent 50%);
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-maroon);
  margin-bottom: var(--space-2);
}

.hero h1 {
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--color-forest);
  margin: 0 0 var(--space-3);
}

.hero-lede {
  max-width: 620px;
  font-size: 16px;
  color: var(--color-ink);
  opacity: 0.86;
}

/* ---------- セクション共通 ---------- */

section { padding: var(--space-6) 0; }

.section-tight { padding: var(--space-5) 0; }

.section-alt { background: var(--color-paper-dim); }

.section-dark {
  background: var(--color-forest);
  color: var(--color-paper);
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-maroon);
  margin-bottom: var(--space-2);
}

.section-dark .eyebrow { color: var(--color-ochre); }

h2.section-title {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.6;
  margin: 0 0 var(--space-3);
}

.body-text {
  font-size: 15.5px;
  line-height: 2;
  max-width: 680px;
}

.body-text p { margin: 0 0 1.4em; }

/* ---------- 年輪タイムライン(サイン要素) ---------- */

.ring-timeline {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-5) 0;
  flex-wrap: wrap;
}

.ring-node {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.ring-node .ring-mark {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--color-forest);
  flex-shrink: 0;
}

.ring-node:nth-child(3) .ring-mark { background: var(--color-forest); }

.ring-node .ring-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.ring-connector {
  flex: 1;
  min-width: 40px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--color-forest) 0 6px, transparent 6px 12px);
}

/* ---------- カード ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.link-card {
  display: block;
  padding: var(--space-4) var(--space-3);
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

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

.link-card .lc-index {
  font-size: 12px;
  color: var(--color-moss);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.link-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin: var(--space-1) 0 var(--space-1);
  color: var(--color-forest);
}

.link-card p {
  font-size: 13.5px;
  color: var(--color-ink);
  opacity: 0.75;
  margin: 0;
}

/* ---------- ボタン ---------- */

.btn {
  display: inline-block;
  padding: 14px 34px;
  border-radius: 3px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn-primary {
  background: var(--color-forest);
  color: var(--color-paper);
}

.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-forest);
  color: var(--color-forest);
}

.btn-outline:hover { background: var(--color-forest); color: var(--color-paper); }

/* ---------- フッター ---------- */

.site-footer {
  padding: var(--space-5) 0 var(--space-4);
  background: var(--color-ink);
  color: rgba(250, 248, 244, 0.72);
}

.site-footer .foot-brand {
  color: var(--color-paper);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: var(--space-2);
}

.site-footer a { opacity: 0.85; }
.site-footer a:hover { opacity: 1; text-decoration: underline; }

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-3) 0;
  font-size: 13.5px;
}

.foot-meta {
  font-size: 12px;
  opacity: 0.55;
  margin-top: var(--space-4);
}

/* ---------- ワークショップページ ---------- */

.ws-meta-table {
  width: 100%;
  max-width: 560px;
  border-collapse: collapse;
  margin-top: var(--space-3);
}

.ws-meta-table th,
.ws-meta-table td {
  text-align: left;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
  font-size: 15px;
}

.ws-meta-table th {
  width: 110px;
  color: var(--color-maroon);
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.ws-task-list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  max-width: 680px;
}

.ws-task-list li {
  position: relative;
  padding: 10px 0 10px 28px;
  font-size: 15px;
  line-height: 1.9;
  border-bottom: 1px dashed var(--color-line);
}

.ws-task-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-forest);
}

.ws-lecturer {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  margin-top: var(--space-3);
  padding: var(--space-3);
  background: var(--color-paper-dim);
  border-radius: 4px;
  max-width: 680px;
}

.ws-lecturer .ws-lecturer-name {
  font-weight: 700;
  color: var(--color-forest);
  margin-bottom: 4px;
}

.ws-lecturer .ws-lecturer-role {
  font-size: 13px;
  opacity: 0.75;
  line-height: 1.7;
}

.ws-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--color-forest);
  color: var(--color-paper);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.ws-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 340px));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.ws-index-card {
  display: block;
  overflow: hidden;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

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

.ws-index-card .ws-index-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.ws-index-card .ws-index-body {
  padding: var(--space-3);
}

.ws-index-card .ws-index-date {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-moss);
}

.ws-index-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-forest);
  margin: 6px 0 4px;
}

.ws-index-card p {
  font-size: 13px;
  opacity: 0.75;
  margin: 0;
}

/* ---------- レスポンシブ ---------- */

@media (max-width: 640px) {
  .hero { padding: 150px var(--space-3) var(--space-5); }
  section { padding: var(--space-5) 0; }
  .ring-timeline { gap: var(--space-1); }
}

/* ---------- アクセシビリティ ---------- */

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-ochre);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}