/* =========================================================
   スマッシュアリーナ（仮）— 非公式ファンメイド たたき台 CSS
   Minecraft 風（草・土・石）／角ばった UI／依存なし
   ========================================================= */

:root {
  --grass: #5d8a3c;
  --grass-dark: #3e5f28;
  --grass-light: #7cb34a;
  --dirt: #8b5a2b;
  --dirt-dark: #5c3a1a;
  --stone: #7a7a7a;
  --stone-dark: #4a4a4a;
  --stone-light: #9a9a9a;
  --bedrock: #1a1a1a;
  --ui-dark: #1e1e1e;
  --ui-panel: #2b2b2b;
  --ui-border: #0a0a0a;
  --gold: #e0c040;
  --gold-dim: #a88a20;
  --danger: #c04040;
  --text: #f0f0e8;
  --text-muted: #b8b8a8;
  --placeholder: #e8a838;
  --shadow: rgba(0, 0, 0, 0.55);
  --max: 960px;
  --pixel: 4px;
  --font: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
  --font-pixel: "Courier New", Consolas, "Lucida Console", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background:
    repeating-linear-gradient(
      90deg,
      #2a2a2a 0 8px,
      #262626 8px 16px
    ),
    var(--bedrock);
  background-color: var(--bedrock);
  min-height: 100vh;
}

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

a {
  color: var(--gold);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: #ffe070;
  text-decoration: underline;
}

code {
  font-family: var(--font-pixel);
  font-size: 0.9em;
  background: #111;
  padding: 0.1em 0.35em;
  border: 2px solid var(--stone-dark);
  color: var(--grass-light);
}

.inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.placeholder {
  color: var(--placeholder);
  font-weight: 700;
  border-bottom: 2px dashed var(--placeholder);
}

/* ---------- 非公式バー（最重要・常時表示） ---------- */
.unofficial-bar {
  background: var(--danger);
  color: #fff;
  text-align: center;
  padding: 0.55rem 1rem;
  border-bottom: 4px solid #801818;
  position: sticky;
  top: 0;
  z-index: 100;
}

.unofficial-bar p {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ---------- ヘッダー ---------- */
.site-header {
  background: linear-gradient(180deg, var(--grass) 0%, var(--grass-dark) 100%);
  border-bottom: 6px solid var(--dirt-dark);
  box-shadow: 0 4px 0 var(--shadow);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 0.9rem 0 0.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-pixel);
  font-weight: 700;
  font-size: 1.15rem;
  text-shadow: 2px 2px 0 var(--ui-border);
}

.brand-icon {
  display: inline-grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  background: var(--dirt);
  border: 3px solid var(--ui-border);
  color: var(--gold);
  font-size: 0.85rem;
}

.brand-sub {
  font-size: 0.85em;
  color: #dceec0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  font-size: 0.9rem;
}

.nav a {
  color: #fff;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.25rem 0.55rem;
  border: 2px solid rgba(0, 0, 0, 0.45);
  text-decoration: none;
}

.nav a:hover,
.nav a:focus-visible {
  background: rgba(0, 0, 0, 0.45);
  color: var(--gold);
  text-decoration: none;
}

.header-disclaimer {
  margin: 0;
  padding: 0.45rem 1rem 0.7rem;
  text-align: center;
  font-size: 0.8rem;
  color: #e8f5d0;
  background: rgba(0, 0, 0, 0.28);
  border-top: 2px solid rgba(0, 0, 0, 0.25);
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  background:
    linear-gradient(180deg, #87ceeb 0%, #6bb3d9 55%, var(--grass) 55%, var(--grass-dark) 100%);
  padding: 2.5rem 0 0;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding-bottom: 2rem;
}

.hero-badge {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.35rem 0.7rem;
  background: var(--danger);
  color: #fff;
  font-family: var(--font-pixel);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 3px solid #801818;
  box-shadow: 3px 3px 0 var(--ui-border);
}

.hero-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-pixel);
  font-size: clamp(1.8rem, 6vw, 2.8rem);
  line-height: 1.2;
  color: #1a1a1a;
  text-shadow:
    3px 3px 0 #fff,
    -1px -1px 0 #fff,
    1px -1px 0 #fff,
    -1px 1px 0 #fff;
}

.hero-kari {
  font-size: 0.55em;
  color: #333;
  text-shadow: none;
  background: rgba(255, 255, 255, 0.65);
  padding: 0.1em 0.35em;
  border: 3px solid #333;
  vertical-align: middle;
}

.hero-lead {
  margin: 0 0 1.25rem;
  max-width: 36em;
  color: #1a2a10;
  font-size: 1.05rem;
  background: rgba(255, 255, 255, 0.55);
  padding: 0.75rem 1rem;
  border: 3px solid rgba(0, 0, 0, 0.35);
}

.hero-unofficial-box {
  margin: 0 0 1.25rem;
  padding: 0.85rem 1rem;
  background: #fff3cd;
  color: #3a2a00;
  border: 4px solid #c04040;
  box-shadow: 4px 4px 0 var(--ui-border);
  max-width: 40em;
}

.hero-unofficial-box p {
  margin: 0;
  font-size: 0.95rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-dirt {
  height: 28px;
  background:
    repeating-linear-gradient(
      90deg,
      var(--dirt) 0 16px,
      var(--dirt-dark) 16px 32px
    );
  border-top: 4px solid var(--grass-dark);
  box-shadow: inset 0 4px 0 rgba(0, 0, 0, 0.2);
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-pixel);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.65rem 1.15rem;
  border: 4px solid var(--ui-border);
  box-shadow: 4px 4px 0 var(--ui-border);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.05s, box-shadow 0.05s;
}

.btn:hover,
.btn:focus-visible {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ui-border);
  text-decoration: none;
}

.btn-primary {
  background: var(--gold);
  color: #1a1a1a;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: #1a1a1a;
  background: #f0d050;
}

.btn-ghost {
  background: var(--ui-panel);
  color: var(--text);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--gold);
}

.btn-disabled,
.btn[aria-disabled="true"] {
  background: var(--stone);
  color: #ddd;
  pointer-events: none;
  opacity: 0.85;
  cursor: not-allowed;
}

/* ---------- セクション共通 ---------- */
.section {
  padding: 2.5rem 0;
  background: var(--ui-dark);
}

.section-alt {
  background: var(--ui-panel);
  border-block: 4px solid var(--stone-dark);
}

.section-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-pixel);
  font-size: clamp(1.25rem, 3.5vw, 1.6rem);
  color: var(--gold);
  border-left: 8px solid var(--grass);
  padding-left: 0.65rem;
  text-shadow: 2px 2px 0 #000;
}

.section-lead {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  max-width: 42em;
}

/* ---------- 機能カード ---------- */
.feature-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature-card {
  background: #222;
  border: 4px solid var(--ui-border);
  box-shadow: 4px 4px 0 #000;
  padding: 1.1rem;
}

.feature-card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-pixel);
  font-size: 1.05rem;
  color: var(--grass-light);
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.6rem;
  background: var(--dirt);
  border: 3px solid var(--ui-border);
  font-family: var(--font-pixel);
  font-weight: 700;
  color: var(--gold);
  font-size: 0.95rem;
}

/* ---------- ダウンロード ---------- */
.download-panel {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1.2fr 1fr;
  background: #1a1a1a;
  border: 4px solid var(--stone);
  box-shadow: 6px 6px 0 #000;
  padding: 1.25rem;
}

.download-meta dl {
  margin: 0;
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.45rem 0.75rem;
}

.download-meta dt {
  margin: 0;
  color: var(--stone-light);
  font-size: 0.85rem;
}

.download-meta dd {
  margin: 0;
  font-size: 0.95rem;
}

.download-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.5rem 0 0.5rem 1rem;
  border-left: 3px dashed var(--stone-dark);
}

.download-note {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- 手順 ---------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.steps li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: #222;
  border: 3px solid var(--ui-border);
  padding: 1rem;
  box-shadow: 3px 3px 0 #000;
}

.step-num {
  flex-shrink: 0;
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  background: var(--grass);
  border: 3px solid var(--ui-border);
  font-family: var(--font-pixel);
  font-weight: 700;
  color: #fff;
}

.steps h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  color: var(--gold);
}

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

/* ---------- 注意 ---------- */
.notes-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.notes-list li {
  padding: 0.85rem 1rem;
  background: #1a1a1a;
  border-left: 6px solid var(--gold-dim);
  border: 3px solid var(--ui-border);
  border-left-width: 6px;
  border-left-color: var(--gold-dim);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.notes-list strong {
  color: var(--text);
}

/* ---------- クレジット ---------- */
.credits-box {
  background: #1a1a1a;
  border: 4px solid var(--stone-dark);
  padding: 1.25rem 1.35rem;
  box-shadow: 4px 4px 0 #000;
}

.credits-box h3 {
  margin: 1.1rem 0 0.35rem;
  font-family: var(--font-pixel);
  font-size: 1rem;
  color: var(--grass-light);
}

.credits-box h3:first-child {
  margin-top: 0;
}

.credits-box p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* ---------- フッター ---------- */
.site-footer {
  background: var(--dirt-dark);
  border-top: 6px solid var(--dirt);
  padding: 1.5rem 0 2rem;
  text-align: center;
}

.footer-unofficial {
  margin: 0 0 0.5rem;
  padding: 0.6rem 0.85rem;
  background: rgba(0, 0, 0, 0.35);
  border: 3px solid var(--danger);
  color: #ffe0e0;
  font-size: 0.95rem;
}

.footer-copy {
  margin: 0.75rem 0 0.35rem;
  font-size: 0.85rem;
  color: #c8a888;
}

.footer-en {
  margin: 0;
  font-size: 0.75rem;
  color: #a08060;
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 720px) {
  .download-panel {
    grid-template-columns: 1fr;
  }

  .download-action {
    border-left: none;
    border-top: 3px dashed var(--stone-dark);
    padding: 1rem 0 0;
  }

  .download-meta dl {
    grid-template-columns: 1fr;
    gap: 0.15rem 0;
  }

  .download-meta dt {
    margin-top: 0.4rem;
  }

  .nav {
    width: 100%;
  }

  .unofficial-bar p {
    font-size: 0.78rem;
  }
}

@media (max-width: 420px) {
  .inner {
    width: min(100% - 1.25rem, var(--max));
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .hero-actions {
    flex-direction: column;
  }
}

/* 印刷時も非公式表記を残す */
@media print {
  .unofficial-bar,
  .header-disclaimer,
  .hero-unofficial-box,
  .footer-unofficial {
    background: #fff !important;
    color: #000 !important;
    border-color: #000 !important;
  }
}