/* ================================================================
   AI-COCOMO コストモデル シミュレータ — スタイルシート
   chidouka-lab.com デザイン統合版
   ================================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* chidouka-lab.com ベースカラー（共通） */
  --bg:          #0B1628;
  --white:       #132035;
  --dark:        #0E1420;
  --mid:         #1E2A40;
  --text-main:   #DDE6F4;
  --text-sub:    #8AAAC8;
  --text-light:  #4E6A88;
  --border:      #1C3050;
  --accent:      #8EB4E3;
  --shadow-sm:   0 2px 8px rgba(0,0,0,.28);
  --shadow-md:   0 4px 20px rgba(0,0,0,.40);
  --shadow-lg:   0 8px 40px rgba(0,0,0,.55);
  --radius:      12px;
  --radius-lg:   20px;
  --max-w:       1040px;
  --header-h:    64px;

  /* AI-COCOMO 固有カラー */
  --cocomo-accent: #5BA4CF;
  --cocomo-green:  #52B788;
  --cocomo-yellow: #E9C46A;
  --cocomo-red:    #E76F51;

  /* コスト3色 */
  --c-human:   #5BA4CF;   /* 青：人的コスト */
  --c-ai:      #52B788;   /* 緑：AIコスト */
  --c-integ:   #E9C46A;   /* 黄：統合コスト */
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Hiragino Kaku Gothic ProN','Hiragino Sans','Yu Gothic','Meiryo',sans-serif;
  background: var(--bg); color: var(--text-main); line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #2A4060; border-radius: 3px; }

/* ================================================================
   ヘッダー
   ================================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #0E1E32; border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 24px; height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.logo-block { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 40px; height: 40px; background: var(--cocomo-accent);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 900; flex-shrink: 0;
}
.logo-text { font-size: 14px; font-weight: 800; color: var(--text-main); white-space: nowrap; }
.logo-sub  { font-size: 10px; color: var(--text-light); letter-spacing: .02em; }
.back-link {
  font-size: 12px; color: var(--text-sub); padding: 6px 12px;
  border-radius: 20px; border: 1px solid var(--border);
  transition: background .2s, color .2s; white-space: nowrap;
}
.back-link:hover { background: rgba(255,255,255,.07); color: var(--text-main); }

/* ================================================================
   ヒーロー
   ================================================================ */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, #0D2040 60%, #0F2A50 100%);
  padding: 48px 24px 40px; text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero-eyebrow {
  font-size: 10px; letter-spacing: 4px; color: var(--cocomo-accent);
  text-transform: uppercase; margin-bottom: 12px;
}
.hero-h1 {
  font-size: clamp(22px, 3.5vw, 36px); font-weight: 900;
  color: #fff; margin-bottom: 10px;
}
.hero-h1 em { color: var(--cocomo-accent); font-style: normal; }
.hero-lead { font-size: 14px; color: rgba(255,255,255,.72); max-width: 520px; margin: 0 auto; }

/* ================================================================
   メインレイアウト
   ================================================================ */
.main-wrap {
  max-width: var(--max-w); margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 800px) {
  .main-wrap { grid-template-columns: 1fr; }
  .result-panel { order: -1; }
}

/* ================================================================
   パネル共通
   ================================================================ */
.panel {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--border); box-shadow: var(--shadow-md);
}
.panel-header {
  padding: 16px 20px 14px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px; cursor: pointer;
}
.panel-title { font-size: 14px; font-weight: 700; color: var(--text-main); flex: 1; }
.panel-icon { font-size: 18px; }
.toggle-arrow {
  font-size: 12px; color: var(--text-light);
  transition: transform .3s;
}
.collapsed .toggle-arrow { transform: rotate(-90deg); }
.panel-body { padding: 20px; }
.panel-body.hidden { display: none; }

/* ================================================================
   モデル概要
   ================================================================ */
.overview-section { margin-bottom: 24px; }
.formula-block {
  background: var(--dark); border-radius: var(--radius);
  padding: 16px 20px; font-family: 'Courier New', monospace;
  font-size: 13px; line-height: 1.9; color: var(--text-sub);
  border: 1px solid var(--border);
}
.formula-block .formula-main { color: var(--cocomo-accent); font-size: 14px; font-weight: 700; }
.formula-block .formula-note { color: var(--text-light); font-size: 12px; }

/* ================================================================
   タブ切替
   ================================================================ */
.tabs-wrap { margin-bottom: 24px; }
.tab-list {
  display: flex; gap: 4px; margin-bottom: 0;
  border-bottom: 1px solid var(--border);
  padding: 0 4px;
}
.tab-btn {
  padding: 8px 14px; font-size: 12px; font-weight: 600;
  color: var(--text-light); background: none; border: none;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  cursor: pointer; transition: color .2s, border-color .2s;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--text-sub); }
.tab-btn.active { color: var(--cocomo-accent); border-bottom-color: var(--cocomo-accent); }
.tab-panel { display: none; padding: 20px 4px 4px; }
.tab-panel.active { display: block; }

/* ================================================================
   パラメータ行
   ================================================================ */
.param-group { margin-bottom: 20px; }
.param-group-title {
  font-size: 11px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--text-light); margin-bottom: 12px; padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.param-row {
  margin-bottom: 14px;
}
.param-label-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 4px; gap: 8px;
}
.param-name {
  font-size: 13px; color: var(--text-main); font-weight: 600;
  display: flex; align-items: center; gap: 6px;
}
.param-symbol {
  font-size: 11px; color: var(--cocomo-accent); font-family: 'Courier New', monospace;
  background: rgba(91,164,207,.12); padding: 1px 6px; border-radius: 4px;
}
.param-value {
  font-size: 13px; font-weight: 700; color: var(--cocomo-accent);
  min-width: 70px; text-align: right; white-space: nowrap;
}
.param-value.sf-label {
  font-size: 11px; color: var(--text-sub); min-width: 80px;
}

/* ツールチップ */
.tooltip-wrap { position: relative; display: inline-flex; }
.tooltip-btn {
  width: 16px; height: 16px; border-radius: 50%;
  background: rgba(255,255,255,.1); border: 1px solid var(--border);
  color: var(--text-light); font-size: 10px; font-weight: 700;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; line-height: 1;
}
.tooltip-box {
  display: none; position: absolute; bottom: calc(100% + 6px); left: 50%;
  transform: translateX(-50%); width: 220px;
  background: #1A2D48; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 12px;
  font-size: 11px; color: var(--text-sub); line-height: 1.6;
  z-index: 200; box-shadow: var(--shadow-md); pointer-events: none;
}
.tooltip-wrap:hover .tooltip-box,
.tooltip-btn:focus + .tooltip-box { display: block; }

/* スライダー */
.param-slider {
  width: 100%; height: 4px;
  -webkit-appearance: none; appearance: none;
  background: var(--border); border-radius: 2px; outline: none; cursor: pointer;
}
.param-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--cocomo-accent); cursor: pointer;
  box-shadow: 0 0 0 3px rgba(91,164,207,.2);
  transition: box-shadow .2s;
}
.param-slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 5px rgba(91,164,207,.3);
}
.param-slider::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--cocomo-accent); cursor: pointer; border: none;
}

/* セレクトボックス */
.param-select {
  width: 100%; padding: 8px 12px; border-radius: var(--radius);
  background: var(--dark); border: 1px solid var(--border);
  color: var(--text-main); font-size: 13px; cursor: pointer;
}

/* タブ内サマリー */
.tab-summary {
  margin-top: 16px; padding: 12px 16px;
  background: var(--dark); border-radius: var(--radius);
  border: 1px solid var(--border);
  font-family: 'Courier New', monospace; font-size: 12px;
  color: var(--text-sub); line-height: 1.9;
}
.tab-summary .val { color: var(--cocomo-accent); font-weight: 700; }

/* ================================================================
   結果パネル（右サイドバー）
   ================================================================ */
.result-panel { position: sticky; top: calc(var(--header-h) + 16px); }
@media (max-width: 800px) {
  .result-panel { position: static; }
}

.metric-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; padding: 16px;
}
.metric-card {
  background: var(--dark); border-radius: var(--radius);
  border: 1px solid var(--border); padding: 12px 14px;
}
.metric-label { font-size: 10px; color: var(--text-light); margin-bottom: 4px; letter-spacing: .5px; }
.metric-value { font-size: 18px; font-weight: 800; color: var(--cocomo-accent); line-height: 1.2; }
.metric-value.big { font-size: 14px; }
.metric-unit { font-size: 11px; color: var(--text-sub); margin-top: 2px; }
.metric-save { font-size: 16px; font-weight: 800; color: var(--cocomo-green); line-height: 1.2; }

/* 計算過程 */
.calc-detail {
  padding: 16px 20px; border-top: 1px solid var(--border);
}
.calc-block { margin-bottom: 14px; }
.calc-block-title {
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--cocomo-accent);
  margin-bottom: 6px; padding-bottom: 4px;
  border-bottom: 1px solid rgba(91,164,207,.2);
}
.calc-line {
  font-size: 11px; font-family: 'Courier New', monospace;
  color: var(--text-sub); line-height: 2.0; white-space: pre-wrap;
  word-break: break-all;
}
.calc-line .cv { color: var(--text-main); font-weight: 700; }
.calc-line .cy { color: var(--cocomo-yellow); }

/* 横棒グラフ */
.bar-section { padding: 16px 20px; border-top: 1px solid var(--border); }
.bar-title { font-size: 11px; color: var(--text-light); margin-bottom: 10px; letter-spacing: 1px; }
.bar-wrap {
  height: 28px; border-radius: 6px; overflow: hidden;
  display: flex; margin-bottom: 10px;
}
.bar-seg {
  height: 100%; display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: rgba(0,0,0,.7);
  transition: width .4s ease;
  overflow: hidden; white-space: nowrap;
}
.bar-human { background: var(--c-human); }
.bar-ai    { background: var(--c-ai); }
.bar-integ { background: var(--c-yellow, var(--c-integ)); }
.bar-legend { display: flex; gap: 12px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 11px; color: var(--text-sub); }
.legend-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

/* ================================================================
   プリセット
   ================================================================ */
.preset-section { margin-bottom: 24px; }
.preset-list { display: flex; flex-direction: column; gap: 8px; padding: 16px; }
.preset-btn {
  padding: 10px 16px; border-radius: var(--radius);
  background: var(--dark); border: 1px solid var(--border);
  color: var(--text-sub); font-size: 12px; font-weight: 600;
  cursor: pointer; text-align: left; transition: background .2s, color .2s, border-color .2s;
  line-height: 1.4;
}
.preset-btn:hover { background: rgba(91,164,207,.12); color: var(--text-main); border-color: var(--cocomo-accent); }
.preset-btn small { display: block; font-weight: 400; font-size: 11px; color: var(--text-light); margin-top: 2px; }

/* ================================================================
   フッター
   ================================================================ */
.site-footer {
  background: var(--dark); border-top: 1px solid var(--border);
  text-align: center; padding: 32px 24px;
  font-size: 12px; color: var(--text-light); line-height: 2.0;
}
.site-footer a { color: var(--accent); }
.site-footer a:hover { text-decoration: underline; }