/* ============================================================
   Moonlight White Tiger Project — Design System
   ============================================================
   月白コハクブランド共通のデザイントークンとUIコンポーネント。
   公式サイト・各アプリ（apps/）から読み込んで使用する。

   使い方:
     <link rel="stylesheet" href="/brand/brand.css" />

   ドキュメント: docs/design-system.md
   ============================================================ */

/* ============================================================
   1. Design Tokens
   資料・ロゴから抽出:
     月白 / 深いネイビー / シアン〜ブルーのグラデ / 琥珀(アクセント)
============================================================ */
:root {
  /* base */
  --c-bg:        #f4fafc;   /* 月白色 */
  --c-panel:     #ffffff;
  --c-navy:      #0c2340;   /* 深いネイビー（ロゴ文字色） */
  --c-ink:       #17324f;   /* 本文 */
  --c-muted:     #54718a;
  --c-moon:      #eef8fc;

  /* brand chromatics */
  --c-teal:      #52d3a8;
  --c-cyan:      #38c3e2;
  --c-blue:      #2b7cd9;
  --c-blue-deep: #1c5cb8;
  --c-cyan-text: #0f7fa8;   /* 小さな文字用の読めるシアン */
  --c-amber:     #d9a248;   /* 琥珀 — アクセントのみ */

  /* gradients（資料背景・青枠と同じ流れ） */
  --grad-brand:  linear-gradient(115deg, #62d8ac 0%, #38c3e2 46%, #2b7cd9 100%);
  --grad-frame:  linear-gradient(115deg, #45cfd6 0%, #2b7cd9 100%);
  --grad-hairline: linear-gradient(to right, #52d3a8, #38c3e2, #2b7cd9);

  /* structure */
  --border-frame:  1px solid rgba(43, 124, 217, 0.22);
  --border-dim:    1px solid rgba(43, 124, 217, 0.12);
  --radius-card:   10px;
  --header-h:      60px;
  --space-section: 112px;
  --shadow-panel:  0 10px 34px rgba(12, 47, 84, 0.08);
  --shadow-hover:  0 16px 44px rgba(43, 124, 217, 0.2), 0 0 18px rgba(56, 195, 226, 0.14);

  --font-mono: "Consolas", "SFMono-Regular", "Courier New", monospace;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", sans-serif;
}

/* アニメーション抑制（全プロダクト共通） */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ============================================================
   2. Layout primitives
============================================================ */
.container {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 0 26px;
}

.section {
  padding: var(--space-section) 0;
  position: relative;
  overflow: clip;
  scroll-margin-top: var(--header-h);
}

.section-compact { padding: 72px 0; }

/* ============================================================
   3. 資料パネル（設定資料のフレーム言語を継承したカード）
============================================================ */
.doc-panel {
  position: relative;
  background: var(--c-panel);
  border: var(--border-frame);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-panel);
}

/* コーナー装飾（HUDブラケット） */
.hud-corners::before,
.hud-corners::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}
.hud-corners::before {
  top: -2px;
  left: -2px;
  border-top: 2.5px solid var(--c-cyan);
  border-left: 2.5px solid var(--c-cyan);
  border-top-left-radius: 8px;
}
.hud-corners::after {
  bottom: -2px;
  right: -2px;
  border-bottom: 2.5px solid var(--c-blue);
  border-right: 2.5px solid var(--c-blue);
  border-bottom-right-radius: 8px;
}

/* 斜めスラッシュバー（資料フレーム上部の ▰▰▰▰ 装飾） */
.hud-slash {
  display: inline-block;
  height: 10px;
  background: repeating-linear-gradient(
    -60deg,
    var(--c-cyan) 0 8px,
    transparent 8px 15px
  );
  opacity: 0.75;
  border-radius: 2px;
}

.hud-slash--white {
  background: repeating-linear-gradient(
    -60deg,
    rgba(255, 255, 255, 0.92) 0 8px,
    transparent 8px 15px
  );
}

/* シェブロン 》》》（ロゴ・資料の矢印モチーフ） */
.hud-chevrons {
  display: inline-flex;
  gap: 5px;
}
.hud-chevrons i {
  width: 12px;
  height: 14px;
  background: currentColor;
  clip-path: polygon(0 0, 45% 0, 100% 50%, 45% 100%, 0 100%, 55% 50%);
}

/* ホバー時に上辺を走る光のライン（近未来UI） */
.hud-sweep {
  position: relative;
  overflow: hidden;
}

.hud-sweep::after {
  content: "";
  position: absolute;
  top: 0;
  left: -45%;
  width: 45%;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--sweep-color, rgba(56, 195, 226, 0.9)),
    transparent
  );
  opacity: 0;
  transition: left 0.55s ease, opacity 0.2s ease;
  pointer-events: none;
}

.hud-sweep:hover::after,
.hud-sweep:focus-visible::after,
.hud-sweep:focus-within::after {
  left: 100%;
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .hud-sweep::after { display: none; }
}

/* 回路ライン背景（シアン / ホワイト） */
.circuit-cyan {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='460' height='460' viewBox='0 0 460 460' fill='none' stroke='%232b7cd9' stroke-width='1.6'%3E%3Cpath d='M20 60h150l40 40h120'/%3E%3Ccircle cx='340' cy='100' r='3.4'/%3E%3Cpath d='M60 400V280l30-30V180'/%3E%3Ccircle cx='90' cy='176' r='3.4'/%3E%3Cpath d='M420 200v110l-40 40'/%3E%3Ccircle cx='376' cy='354' r='3.4'/%3E%3Crect x='16' y='56' width='7' height='7' fill='%232b7cd9' stroke='none'/%3E%3Crect x='416' y='196' width='7' height='7' fill='%232b7cd9' stroke='none'/%3E%3Cpath d='M220 430h120'/%3E%3Ccircle cx='346' cy='430' r='3.4'/%3E%3C/svg%3E");
  background-size: 460px 460px;
}

.circuit-white {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='460' height='460' viewBox='0 0 460 460' fill='none' stroke='%23ffffff' stroke-width='1.6'%3E%3Cpath d='M20 60h150l40 40h120'/%3E%3Ccircle cx='340' cy='100' r='3.4'/%3E%3Cpath d='M60 400V280l30-30V180'/%3E%3Ccircle cx='90' cy='176' r='3.4'/%3E%3Cpath d='M420 200v110l-40 40'/%3E%3Ccircle cx='376' cy='354' r='3.4'/%3E%3Crect x='16' y='56' width='7' height='7' fill='%23ffffff' stroke='none'/%3E%3Crect x='416' y='196' width='7' height='7' fill='%23ffffff' stroke='none'/%3E%3Cpath d='M220 430h120'/%3E%3Ccircle cx='346' cy='430' r='3.4'/%3E%3C/svg%3E");
  background-size: 460px 460px;
}

/* ============================================================
   4. セクション見出し（資料シートのタイトル形式）
      [NO.01] 見出し ／ EN LABEL ▰▰▰▰
============================================================ */
.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.sec-no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: #fff;
  background: var(--grad-frame);
  padding: 5px 12px 4px;
  border-radius: 4px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  white-space: nowrap;
}

.sec-titles {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.sec-ja {
  margin: 0;
  font-size: clamp(1.6rem, 3.4vw, 2.05rem);
  color: var(--c-navy);
  letter-spacing: 0.1em;
  font-weight: 700;
  line-height: 1.3;
}

.sec-en {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-cyan-text);
}

.sec-line {
  flex: 1 1 60px;
  height: 10px;
  min-width: 60px;
  background: repeating-linear-gradient(
    -60deg,
    rgba(43, 124, 217, 0.35) 0 8px,
    transparent 8px 15px
  );
  border-radius: 2px;
}

/* ============================================================
   5. ボタン（HUDシステムUI）
      .mwt-btn + .mwt-btn--primary / --secondary / --ghost
============================================================ */
.mwt-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  padding: 13px 34px;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background 0.2s, color 0.2s, box-shadow 0.25s, transform 0.2s;
}

/* ホバー時に流れる光 */
.mwt-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    transparent 40%,
    var(--btn-shine, rgba(255, 255, 255, 0.45)) 50%,
    transparent 60%
  );
  transform: translateX(-130%);
  transition: transform 0.55s ease;
  pointer-events: none;
}

.mwt-btn:hover::after,
.mwt-btn:focus-visible::after {
  transform: translateX(130%);
}

@media (prefers-reduced-motion: reduce) {
  .mwt-btn::after { display: none; }
}

.mwt-btn--primary {
  background: var(--grad-frame);
  color: #fff;
  box-shadow: 0 6px 18px rgba(43, 124, 217, 0.28);
}

.mwt-btn--primary:hover,
.mwt-btn--primary:focus-visible {
  box-shadow:
    0 12px 30px rgba(43, 124, 217, 0.4),
    0 0 18px rgba(56, 195, 226, 0.3);
  transform: translateY(-2px);
}

.mwt-btn--navy {
  background: var(--c-navy);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(56, 195, 226, 0.35);
}

.mwt-btn--navy:hover,
.mwt-btn--navy:focus-visible {
  background: #143156;
  box-shadow:
    inset 0 0 0 1px rgba(127, 231, 242, 0.85),
    0 8px 22px rgba(12, 35, 64, 0.3);
  transform: translateY(-2px);
}

.mwt-btn--secondary {
  background: var(--c-panel);
  color: var(--c-navy);
  --btn-shine: rgba(56, 195, 226, 0.3);
  box-shadow: inset 0 0 0 1px rgba(43, 124, 217, 0.3);
}

.mwt-btn--secondary:hover,
.mwt-btn--secondary:focus-visible {
  box-shadow:
    inset 0 0 0 1px rgba(43, 124, 217, 0.6),
    0 8px 20px rgba(12, 35, 64, 0.16);
  transform: translateY(-2px);
}

/* ============================================================
   6. タグ / バッジ / チップ
============================================================ */
/* モノスペースの管理番号タグ（REF-01 など） */
.mwt-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: #fff;
  background: var(--grad-frame);
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
}

.mwt-tag--navy { background: var(--c-navy); }

/* 状態バッジ */
.mwt-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  border-radius: 4px;
  padding: 4px 10px;
  border: 1px solid;
}

.mwt-badge--amber {
  color: #8a5f1d;
  border-color: rgba(217, 162, 72, 0.5);
  background: rgba(217, 162, 72, 0.08);
}

.mwt-badge--ok {
  color: #10645e;
  border-color: rgba(82, 211, 168, 0.6);
  background: rgba(82, 211, 168, 0.1);
}

.mwt-badge--blue {
  color: var(--c-blue-deep);
  border-color: rgba(43, 124, 217, 0.4);
  background: rgba(43, 124, 217, 0.07);
}

/* 白ピルチップ（名前表記などグラデ背景上で使用） */
.mwt-chip {
  display: inline-block;
  background: rgba(255, 255, 255, 0.94);
  color: var(--c-navy);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  padding: 6px 16px;
  border-radius: 999px;
  box-shadow: 0 2px 10px rgba(12, 35, 64, 0.15);
}

/* ============================================================
   7. インフォメーションパネル / 通知
============================================================ */
.mwt-info {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 20px;
  background: rgba(43, 124, 217, 0.06);
  border: 1px dashed rgba(43, 124, 217, 0.35);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--c-ink);
  letter-spacing: 0.04em;
}

.mwt-note {
  border-left: 3px solid rgba(217, 162, 72, 0.6);
  background: rgba(217, 162, 72, 0.06);
  border-radius: 0 6px 6px 0;
  padding: 12px 18px;
  font-size: 0.92rem;
  color: var(--c-ink);
}

/* ============================================================
   8. モーダル（<dialog> 用）
============================================================ */
.mwt-modal {
  border: none;
  padding: 0;
  border-radius: 12px;
  background: var(--c-panel);
  color: var(--c-ink);
  box-shadow:
    0 0 0 1.5px rgba(56, 195, 226, 0.5),
    0 40px 100px rgba(4, 16, 34, 0.6);
}

.mwt-modal::backdrop {
  background: rgba(6, 21, 42, 0.86);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.mwt-modal[open] {
  animation: mwt-modal-in 0.32s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.mwt-modal[open]::backdrop {
  animation: mwt-backdrop-in 0.32s ease;
}

@keyframes mwt-modal-in {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to   { opacity: 1; transform: none; }
}

@keyframes mwt-backdrop-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ============================================================
   9. ローディング（三日月スピナー）
============================================================ */
.mwt-loading {
  display: inline-block;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 3px solid rgba(56, 195, 226, 0.2);
  border-top-color: var(--c-cyan);
  animation: mwt-spin 0.9s linear infinite;
}

@keyframes mwt-spin {
  to { transform: rotate(360deg); }
}

/* 三日月マーク（静的な装飾） */
.mwt-crescent {
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  box-shadow: inset -6px -2px 0 var(--c-amber);
  transform: rotate(18deg);
}

/* ============================================================
   10. スクロール出現アニメーション
       JS側で .in-view を付与（website/src/layouts/BaseLayout.astro 参照）
============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   11. ユーティリティ
============================================================ */
/* 公開前後で表示を切り替え（<html>.revealed と併用） */
html:not(.revealed) .when-revealed { display: none !important; }
html.revealed .when-sealed { display: none !important; }

/* スクリーンリーダー専用テキスト */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}