:root {
  /* [視覺] 白天模式 (Light Mode) 預設：灰白/深藍/深灰 高級感 */
  --bg-main: #f5f6f8;    /* 低調灰白背景 */
  --bg-card: #ffffff;    /* 純白卡片 */
  --bg-input: #f9f9fa;   /* 極淺灰輸入框 */
  --bg-warm: #eef0f4;    /* 軌道背景 */
  
  --text-main: #2d3748;  /* 深灰色主要文字 */
  --text-muted: #718096; /* 淺灰色提示文字 */
  
  --accent: #1e457d;     /* 深藍色強調 (主視覺DNA) */
  --accent-hover: #2a5a9e; 
  --divider: #e2e8f0;    /* 淡灰色分割線 */
  
  --r: 12px;
  --r-sm: 6px;
  --shadow: 0 4px 20px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.03); /* 輕微陰影 */
  
  /* 圖表專用動態變數 */
  --chart-color-1: #1e457d; /* 深藍 */
  --chart-color-2: #8ba8d4; /* 淺藍 */
  --chart-grid: #e2e8f0;
  --chart-text: #718096;
}

[data-theme="dark"] {
  /* [視覺] 夜間模式 (Dark Mode)：黑色貴金屬 (Black & Gold) */
  --bg-main: #000000;    /* 純黑 */
  --bg-card: #141414;    /* 深灰卡片 */
  --bg-input: #080808;   /* 更深的灰色 */
  --bg-warm: #1e1e1e;
  
  --text-main: #dddddd;  /* 米白文字 */
  --text-muted: #888888;
  
  --accent: #f2c230;     /* 金黃色 (Gold) */
  --accent-hover: #ffdf85; 
  --divider: #333333;
  
  --shadow: none; /* 夜間模式無陰影，靠層次 */
  
  --chart-color-1: #f2c230; /* 金黃 */
  --chart-color-2: #ffffff; /* 純白 */
  --chart-grid: #333333;
  --chart-text: #888888;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', 'Noto Sans TC', sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  padding-bottom: 75px; 
  transition: background-color 0.3s, color 0.3s; /* 平滑切換模式 */
}

/* ── TOP BAR ── */
.topbar { 
  background: var(--accent); /* 白天深藍，夜間金黃(被覆蓋) */
  padding: 13px 20px; 
  display: flex; 
  align-items: center; 
  gap: 14px; 
  position: sticky; 
  top: 0; 
  z-index: 200; 
  transition: background-color 0.3s;
}
[data-theme="dark"] .topbar {
  background: var(--bg-main);
  border-bottom: 2px solid var(--accent);
}
.topbar-logo { 
  font-family: 'DM Serif Display', serif; 
  font-size: 18px; 
  color: #fff; 
  letter-spacing: -0.02em; 
  transition: opacity 0.2s; 
}
.topbar-logo:hover { opacity: 0.8; }
.topbar-logo em { 
  color: #f2c2c2; /* 白天預設粉色 */
  font-style: italic; 
}
[data-theme="dark"] .topbar-logo em {
  color: var(--accent); /* 夜間模式金色 */
}
.header-icons { margin-left: auto; display: flex; align-items: center; }
.theme-toggle { cursor: pointer; color: #fff; font-size: 18px; transition: opacity 0.2s; opacity: 0.8; }
.theme-toggle:hover { opacity: 1; }

/* ── CONTAINER ── */
.container { max-width: 1060px; margin: 0 auto; padding: 0 16px 20px; }

/* ── MODULE & TOGGLE TABS (修復：縮小字體的 Grid 排列) ── */
.toggle-rail { 
  display: grid; 
  grid-template-columns: repeat(4, 1fr); 
  background: var(--bg-warm); 
  padding: 4px; 
  border-radius: var(--r-sm); 
  gap: 4px; 
}
.module-rail { 
  display: grid; 
  grid-template-columns: repeat(3, 1fr); 
  background: var(--bg-warm); 
  padding: 4px; 
  border-radius: var(--r-sm); 
  gap: 4px; 
  margin-bottom: 0; 
}

/* 修復：縮小按鈕與文字，確保完美塞入一行 */
.toggle-btn, .module-btn { 
  border: none; 
  background: transparent; 
  padding: 8px 0; 
  font-family: inherit; 
  font-size: 12px; /* 縮小字體 */
  font-weight: 600; 
  color: var(--text-muted); 
  border-radius: 4px; 
  cursor: pointer; 
  transition: all 0.2s; 
  text-align: center; 
  white-space: nowrap; /* 絕對不換行 */
  letter-spacing: -0.5px; /* 微縮字距 */
}
.toggle-btn.active { 
  background: var(--bg-card); 
  color: var(--accent); 
  box-shadow: 0 1px 3px rgba(0,0,0,0.15); 
}
[data-theme="dark"] .toggle-btn.active { box-shadow: 0 1px 3px rgba(0,0,0,0.5); }

/* 修復：針對提前還款的 3 顆按鈕組，字體再稍微調整 */
.strategy-rail { grid-template-columns: repeat(3, 1fr); }
.strategy-rail .toggle-btn { font-size: 11px; padding: 8px 2px; }

.module-btn { border: 1px solid var(--divider); background: var(--bg-card); padding: 10px 4px; }
.module-btn:hover { color: var(--text-main); background: var(--bg-input); }
.module-btn.active { background: var(--bg-input); color: var(--accent); border-color: var(--accent); }

/* ── TAB CONTENT & GRID SYSTEM ── */
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeUp 0.3s ease; }
@keyframes fadeUp { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

.layout-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.grid-1 { display: grid; grid-template-columns: 1fr; gap: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }

/* ── CARD ── */
.card { 
  background: var(--bg-card); 
  border-radius: var(--r); 
  padding: 20px; 
  box-shadow: var(--shadow); 
  border: 1px solid var(--divider); 
  transition: background-color 0.3s, border-color 0.3s;
}
.card-title { 
  font-size: 17px; 
  font-weight: 700; 
  color: var(--text-main); 
  margin-bottom: 20px; 
  padding-bottom: 12px; 
  border-bottom: 1px solid var(--divider); 
  display: flex; 
  align-items: center; 
  line-height: 1.2; 
}

/* ── FORM FIELDS ── */
.field { position: relative; margin-bottom: 14px; }
.field label { display: flex; justify-content: space-between; align-items: center; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; }

.field input, .field select { 
  width: 100%; 
  padding: 10px 12px; 
  border: 1px solid var(--divider); 
  box-shadow: none;
  border-radius: var(--r-sm); 
  font-size: 14px; 
  font-family: inherit; 
  color: var(--text-main); 
  background-color: var(--bg-input); 
  transition: all 0.2s; 
}

[data-theme="dark"] .field input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(0.8); }

.field input:focus, .field select:focus { 
  outline: none; border-color: var(--accent); 
  box-shadow: 0 0 0 3px rgba(30, 69, 125, 0.1); 
}
[data-theme="dark"] .field input:focus, [data-theme="dark"] .field select:focus { box-shadow: 0 0 0 3px rgba(242, 194, 48, 0.1); }

.field input[readonly] { background: var(--bg-warm); color: var(--text-muted); cursor: not-allowed; font-weight: 600; border: 1px dashed var(--divider); }
.field-hint { font-size: 11px; color: var(--accent); margin-top: 4px; }
.step-add-btn { background: var(--bg-input); border: 1px dashed var(--divider); color: var(--text-muted); padding: 8px 12px; border-radius: var(--r-sm); cursor: pointer; font-size: 13px; width: 100%; transition: all 0.2s; }
.step-add-btn:hover { background: var(--bg-warm); color: var(--text-main); }
.fbadge { font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 4px; }
.fbadge-auto { background: var(--bg-warm); color: var(--accent); }

.sep { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; color: var(--accent); margin: 20px 0 12px; display: flex; align-items: center; gap: 10px; }
.sep::after { content:''; flex:1; height:1px; background: var(--divider); }

/* ── BUTTONS SYSTEM ── */
.btn { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; padding: 12px 16px; font-family: inherit; font-size: 15px; font-weight: 600; border-radius: var(--r-sm); cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); border: none; margin-top: 10px; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 2px 6px rgba(0,0,0,0.15); }
[data-theme="dark"] .btn-primary { color: #000; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-input); color: var(--text-main); border: 1px solid var(--divider); }
.btn-secondary:hover { background: var(--bg-warm); transform: translateY(-1px); }

/* ── RESULTS & AI INSIGHTS ── */
.res-hero { text-align: center; padding: 20px 16px; border-radius: var(--r-sm); margin-bottom: 16px; background: var(--bg-input); border: 1px solid var(--accent); }
.res-hero.red { border-color: #ff4d4d; }
[data-theme="dark"] .res-hero.red { background: #2a1111; }
[data-theme="light"] .res-hero.red { background: #fff0f0; }
.res-hero.red .res-label, .res-hero.red .res-number, .res-hero.red .res-number span { color: #ff4d4d; }

.res-label { font-size: 11px; font-weight: 700; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: 6px; }
.res-number { font-size: 32px; font-weight: 700; color: var(--accent); }
.res-number span { font-size: 16px; color: var(--text-main); font-weight: 500; }
.res-sub { font-size: 13px; color: var(--text-muted); margin-top:4px; }

.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 16px; }
.stat-item { background: var(--bg-input); border-radius: var(--r-sm); padding: 12px; border: 1px solid var(--divider); }
.stat-label { font-size: 11px; color: var(--text-muted); font-weight: 600; margin-bottom: 4px; }
.stat-val { font-size: 16px; font-weight: 700; color: var(--text-main); }

.ai-insight-box { background: var(--bg-input); border-left: 4px solid var(--accent); padding: 16px; border-radius: 0 var(--r-sm) var(--r-sm) 0; margin-top: 20px; font-size: 13px; line-height: 1.65; color: var(--text-main); }
.ai-insight-box strong { color: var(--accent); font-weight: 700; }

/* ── TABLES ── */
.tbl-wrap { border: 1px solid var(--divider); border-radius: var(--r-sm); max-height: 350px; overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 11px; white-space: nowrap; }
th { background: var(--bg-warm); color: var(--text-main); padding: 8px 2px; text-align: right; font-weight: 600; position: sticky; top: 0; z-index: 10; }
td { padding: 8px 2px; border-bottom: 1px solid var(--divider); text-align: right; color: var(--text-main); }
.grace-row td { background: var(--bg-input); color: var(--accent); }

/* ── 修復手機版原生選單與日期的破圖 (URL-Encoded SVG) ── */
select, input[type="date"] {
  -webkit-appearance: none; 
  -moz-appearance: none; 
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23718096' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 10.5L8 15l4.5-4.5h-9zm9-5L8 1 3.5 5.5h9z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; 
  background-position: right 12px center; 
  background-size: 14px; 
  padding-right: 36px !important; 
  cursor: pointer;
}

[data-theme="dark"] select, [data-theme="dark"] input[type="date"] {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23888888' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 10.5L8 15l4.5-4.5h-9zm9-5L8 1 3.5 5.5h9z'/%3E%3C/svg%3E");
}

/* ── 多目標比較器 ── */
.compare-obj { padding: 12px; border-radius: var(--r-sm); border: 1px solid var(--divider); }
.compare-obj-a { background: rgba(30, 69, 125, 0.05); border-color: rgba(30, 69, 125, 0.2); }
[data-theme="dark"] .compare-obj-a { background: rgba(242, 194, 48, 0.05); border-color: rgba(242, 194, 48, 0.2); }
.compare-obj-b { background: var(--bg-input); }

/* ── 頁尾 & Bottom Bar ── */
footer { width: 100%; background-color: var(--bg-card); color: var(--text-muted); text-align: center; padding: 30px 20px 40px 20px; font-size: 13px; border-top: 1px solid var(--divider); }
.footer-copyright a { color: var(--accent); text-decoration: none; font-weight: bold; }
.footer-nav { display: flex; justify-content: center; gap: 6px; width: 100%; flex-wrap: wrap; }
.footer-nav button { background: var(--bg-input); color: var(--text-main); border: 1px solid var(--divider); padding: 10px 12px; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: bold; transition: opacity 0.2s; display: flex; justify-content: center; align-items: center; gap: 6px; }
.footer-nav button:hover { opacity: 0.8; }
.btn-share { background: #1c1e21 !important; color: white !important; border: none !important; }
.btn-export { background: #2c3e50 !important; color: white !important; border: none !important; }

.bottom-bar { position: fixed; bottom: 0; left: 0; width: 100%; background-color: var(--bg-main); border-top: 1px solid var(--divider); display: flex; justify-content: space-around; align-items: center; padding: 8px 0 calc(8px + env(safe-area-inset-bottom)); z-index: 1000; }
.bottom-bar a { display: flex; flex-direction: column; align-items: center; text-decoration: none; color: var(--text-muted); font-size: 11px; font-weight: 600; gap: 4px; transition: color 0.2s; flex: 1; }
.bottom-bar a:hover { color: var(--accent); }
.bottom-bar .icon { font-size: 22px; }

/* ── Modal ── */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); display: none; align-items: center; justify-content: center; z-index: 9999; }
.modal-content { background: var(--bg-card); max-width: 520px; width: 90%; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); overflow: hidden; border: 1px solid var(--divider); }
.modal-header { padding: 18px 20px; border-bottom: 1px solid var(--divider); display: flex; justify-content: space-between; align-items: center; background: var(--bg-input); }
.modal-title { font-size: 18px; font-weight: bold; color: var(--accent); }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); }
.modal-body { padding: 24px; line-height: 1.7; color: var(--text-main); font-size: 15px; }
.modal-body h3 { color: var(--accent); margin-bottom: 10px; }

/* ============================================================
   🖨️ 原生列印 / PDF 輸出專屬樣式 (@media print)
============================================================ */
@media print {
    .topbar, .bottom-bar, footer, #role-module-picker, 
    .btn, .btn-primary, .btn-secondary, .step-add-btn, 
    .theme-toggle, .modal-overlay, .pdf-ignore {
        display: none !important;
    }
    body { background: #ffffff !important; color: #000000 !important; padding: 0 !important; }
    .container { padding: 0 !important; max-width: 100% !important; }
    .card { box-shadow: none !important; border: 1px solid #cbd5e0 !important; margin-bottom: 20px !important; page-break-inside: avoid !important; }
    .tbl-wrap { max-height: none !important; overflow: visible !important; border: none !important; }
    input, select { border: none !important; background: transparent !important; color: #000000 !important; font-weight: 700 !important; padding: 0 !important; -webkit-appearance: none !important; appearance: none !important; }
    * { -webkit-print-color-adjust: exact !important; print-color-adjust: exact !important; }
}

/* ============================================================
   🌟 精華截圖圖檔 專屬樣式設定
============================================================ */
/* 當卡片正在被截圖時，隱藏表格、分隔線與截圖按鈕本身 */
.exporting-img .hide-in-img {
    display: none !important;
}

/* 確保截出來的圖片具有高對比度 (與 PDF 同等清晰度) */
.mode-pdf {
    --bg-main: #ffffff !important;
    --bg-card: #ffffff !important;
    --text-main: #000000 !important; 
    --text-muted: #4a5568 !important; 
    --divider: #cbd5e0 !important;   
}

.mode-pdf * { animation: none !important; transition: none !important; -webkit-font-smoothing: antialiased; }
.mode-pdf input, .mode-pdf select { color: #000000 !important; font-weight: 600 !important; border-color: var(--divider) !important; }
.mode-pdf .res-number { color: #000000 !important; }
/* ============================================================
   📄 官方合約與文件下載區 (Doc Cards)
============================================================ */
.doc-card { 
  background: var(--bg-input); 
  border: 1px solid var(--divider); 
  border-radius: var(--r-sm); 
  padding: 16px; 
  margin-bottom: 12px; 
  transition: transform 0.2s, border-color 0.2s; 
}
.doc-card:hover { 
  transform: translateY(-2px); 
  border-color: var(--accent); 
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.doc-title { 
  font-size: 15px; 
  font-weight: 700; 
  color: var(--text-main); 
  margin-bottom: 8px; 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
}
.doc-desc { 
  font-size: 13px; 
  color: var(--text-muted); 
  line-height: 1.6; 
  margin-bottom: 14px; 
}

/* 內政部官方標籤 */
.badge { 
  font-size: 11px; 
  padding: 3px 8px; 
  border-radius: 12px; 
  font-weight: 700; 
}
.badge.official { 
  background: rgba(30, 69, 125, 0.1); 
  color: var(--accent); 
}
[data-theme="dark"] .badge.official { 
  background: rgba(242, 194, 48, 0.15); 
}

/* 下載按鈕 */
.btn-link { 
  display: inline-block; 
  background: transparent; 
  color: var(--accent); 
  border: 1px solid var(--accent); 
  padding: 6px 14px; 
  border-radius: var(--r-sm); 
  font-size: 12px; 
  font-weight: 600; 
  text-decoration: none; 
  transition: all 0.2s; 
  text-align: center; 
}
.btn-link:hover { 
  background: var(--accent); 
  color: var(--bg-card); 
}