@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

/* ── Variables ──────────────────────────────────── */
:root {
  --c-primary:       #16a34a;
  --c-primary-h:     #15803d;
  --c-primary-bg:    #f0fdf4;
  --c-accent:        #2563eb;
  --c-green:         #16a34a;
  --c-red:           #dc2626;
  --c-yellow:        #d97706;

  --bg:              #f8fafc;
  --bg-surface:      #ffffff;
  --bg-alt:          #f1f5f9;
  --border:          #e2e8f0;
  --border-focus:    #16a34a;

  --text:            #0f172a;
  --text-2:          #475569;
  --text-3:          #94a3b8;

  --topnav-h:        68px;
  --bn-h:            60px;

  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  14px;
  --r-card: 12px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 8px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 24px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.04);
  --shadow-card: 0 0 0 1px rgba(0,0,0,.03), 0 2px 4px rgba(0,0,0,.06);
  --shadow-hover: 0 0 0 1px rgba(22,163,74,.12), 0 4px 12px rgba(0,0,0,.10);

  --font: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'PingFang TC',
    'Microsoft JhengHei', 'Noto Sans TC', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Courier New', monospace;

  --dur: .16s;
  --dur-md: .22s;
}

[data-theme="dark"] {
  --bg:          #0f172a;
  --bg-surface:  #1e293b;
  --bg-alt:      #162032;
  --border:      #2d3f55;
  --c-primary-bg:#052e16;

  --text:   #f1f5f9;
  --text-2: #94a3b8;
  --text-3: #64748b;

  --shadow-card: 0 0 0 1px rgba(255,255,255,.04), 0 2px 6px rgba(0,0,0,.3);
  --shadow-hover: 0 0 0 1px rgba(22,163,74,.25), 0 4px 14px rgba(0,0,0,.35);
}

/* ── Reset ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: clamp(15px, 1.1vw, 18px);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: var(--font); }

/* ── Layout ──────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Top navigation ───────────────────────────────── */
#topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topnav-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  z-index: 200;
  box-shadow: var(--shadow-xs);
}

.topnav-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 28px;
  gap: 2px;
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  margin-right: 16px;
  flex-shrink: 0;
}
.logo:hover { text-decoration: none; }
.logo-text {
  font-size: clamp(17px, 1.4vw, 22px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.2px;
}

.topnav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

/* Dropdown */
.nav-dd { position: relative; }

.nav-dd-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 9px 16px;
  font-size: clamp(15px, 1.2vw, 18px);
  font-weight: 500;
  color: var(--text-2);
  background: none;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background var(--dur), color var(--dur);
  white-space: nowrap;
  font-family: var(--font);
}
.nav-dd-btn:hover { background: var(--bg-alt); color: var(--text); }
.nav-dd-btn.active { color: var(--c-primary); font-weight: 600; }

.dd-chevron {
  opacity: .45;
  transition: transform var(--dur);
}
.nav-dd:hover .dd-chevron,
.nav-dd:focus-within .dd-chevron { transform: rotate(180deg); opacity: .7; }

.nav-dd-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 168px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  padding: 5px;
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--dur), visibility var(--dur), transform var(--dur);
}
.nav-dd:hover .nav-dd-panel,
.nav-dd:focus-within .nav-dd-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dd-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  font-size: clamp(13px, 1vw, 16px);
  color: var(--text-2);
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background var(--dur), color var(--dur);
}
.nav-dd-item:hover { background: var(--bg-alt); color: var(--text); text-decoration: none; }
.nav-dd-item.active { color: var(--c-primary); background: var(--c-primary-bg); }
[data-theme="dark"] .nav-dd-item.active { background: rgba(22,163,74,.12); }
.nav-dd-item svg { flex-shrink: 0; opacity: .55; }

/* Direct nav link */
.nav-link {
  display: flex;
  align-items: center;
  padding: 9px 16px;
  font-size: clamp(15px, 1.2vw, 18px);
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background var(--dur), color var(--dur);
  white-space: nowrap;
}
.nav-link:hover { background: var(--bg-alt); color: var(--text); text-decoration: none; }
.nav-link.active { color: var(--c-primary); font-weight: 600; }

/* Right actions */
.topnav-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

#menu-toggle { display: none; }

/* Mobile nav overlay (full-screen drawer below topnav) */
#nav-overlay {
  display: none;
  position: fixed;
  top: var(--topnav-h);
  left: 0; right: 0; bottom: 0;
  background: var(--bg-surface);
  overflow-y: auto;
  z-index: 190;
  border-top: 1px solid var(--border);
}
#nav-overlay.open { display: block; }

.nav-overlay-inner { padding: 8px 0 48px; }

.mob-nav-section {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}
.mob-nav-section:last-child { border-bottom: none; }

.mob-nav-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-3);
  padding: 8px 20px 4px;
}

.mob-nav-item {
  display: block;
  padding: 14px 20px;
  font-size: 17px;
  color: var(--text-2);
  text-decoration: none;
  transition: background var(--dur), color var(--dur);
}
.mob-nav-item:hover { background: var(--bg-alt); color: var(--text); text-decoration: none; }
.mob-nav-item.active { color: var(--c-primary); font-weight: 600; }

/* Main content */
#page-content {
  flex: 1;
  padding: calc(var(--topnav-h) + 48px) 60px 72px;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

#bottom-nav { display: none; }

/* Icon button (theme toggle etc.) */
.icon-btn {
  width: 34px; height: 34px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: background var(--dur);
}
.icon-btn:hover { background: var(--bg-alt); }

/* ── Cards ───────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 22px 24px;
  box-shadow: var(--shadow-card);
}
.card + .card { margin-top: 14px; }

.card-title {
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 650;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -.1px;
}

/* ── Page header ─────────────────────────────────── */
.page-header { margin-bottom: 24px; }
.page-title {
  font-size: clamp(20px, 1.8vw, 30px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.4px;
  line-height: 1.3;
}
.page-desc {
  color: var(--text-2);
  font-size: clamp(14px, 1.1vw, 17px);
  margin-top: 5px;
  line-height: 1.55;
}

/* ── Form controls ────────────────────────────────── */
.form-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  min-width: 140px;
}
.form-group label {
  font-size: clamp(12px, 0.9vw, 14px);
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: .1px;
  text-transform: uppercase;
}
.form-hint {
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--text-3);
  margin-top: 2px;
}

input[type="number"],
input[type="text"],
input[type="date"],
select {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-surface);
  color: var(--text);
  font-size: clamp(14px, 1.1vw, 16px);
  font-family: var(--font);
  transition: border-color var(--dur), box-shadow var(--dur);
  outline: none;
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }

input:focus, select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(22,163,74,.12);
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* Segment control */
.segment-group {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--bg-alt);
}
.segment-btn {
  flex: 1;
  padding: 8px 4px;
  font-size: clamp(13px, 1vw, 15px);
  font-weight: 500;
  color: var(--text-2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--dur), color var(--dur);
  white-space: nowrap;
  font-family: var(--font);
}
.segment-btn.active {
  background: var(--c-primary);
  color: white;
  font-weight: 600;
}

/* Stepper input */
.stepper {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
  transition: border-color var(--dur), box-shadow var(--dur);
}
.stepper:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(22,163,74,.12);
}
.stepper input {
  border: none;
  border-radius: 0;
  text-align: center;
  flex: 1;
  min-width: 0;
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}
.stepper input:focus { box-shadow: none; border: none; }
.stepper-btn {
  width: 36px;
  height: 38px;
  background: var(--bg-alt);
  color: var(--text-2);
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--dur), color var(--dur);
  cursor: pointer;
  border: none;
  font-family: var(--font);
}
.stepper-btn:hover { background: var(--border); color: var(--text); }

/* ── Result cards ─────────────────────────────────── */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}
.result-item {
  background: var(--bg-alt);
  border-radius: 10px;
  padding: 14px 16px;
  border: 1px solid transparent;
}
.result-label {
  font-size: clamp(11px, 0.85vw, 13px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-3);
  margin-bottom: 5px;
}
.result-value {
  font-size: clamp(18px, 1.5vw, 24px);
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
  letter-spacing: -.4px;
  line-height: 1.2;
}
.result-value.green { color: var(--c-green); }
.result-value.red   { color: var(--c-red); }

/* ── Tables ──────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(13px, 1vw, 15px);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}
thead tr {
  background: var(--bg-alt);
}
th {
  padding: 9px 14px;
  text-align: right;
  font-size: clamp(11px, 0.85vw, 13px);
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .5px;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}
th:first-child { text-align: left; }
td {
  padding: 9px 14px;
  text-align: right;
  border-top: 1px solid var(--border);
  color: var(--text-2);
  font-size: clamp(13px, 1vw, 15px);
}
td:first-child { text-align: left; color: var(--text); font-weight: 500; }
tbody tr:hover { background: rgba(0,0,0,.02); }
[data-theme="dark"] tbody tr:hover { background: rgba(255,255,255,.03); }
tbody tr.highlight { background: var(--c-primary-bg); }
tbody tr.highlight td { color: var(--c-primary); font-weight: 600; }
.text-green { color: var(--c-green) !important; font-weight: 600; }
.text-red   { color: var(--c-red)   !important; font-weight: 600; }

/* ── Buttons ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: clamp(13px, 1vw, 15px);
  font-weight: 600;
  font-family: var(--font);
  transition: background var(--dur), box-shadow var(--dur), transform .1s;
  cursor: pointer;
  border: none;
  letter-spacing: -.1px;
}
.btn:active { transform: scale(.98); }
.btn-primary {
  background: var(--c-primary);
  color: white;
  box-shadow: 0 1px 3px rgba(22,163,74,.25);
}
.btn-primary:hover { background: var(--c-primary-h); box-shadow: 0 2px 6px rgba(22,163,74,.3); }
.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 1.5px solid var(--c-primary);
}
.btn-outline:hover { background: var(--c-primary-bg); }

/* ── Home page ───────────────────────────────────── */

/* Hero: centered, full width */
.home-hero {
  text-align: center;
  padding: 80px 48px 72px;
  margin-bottom: 64px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: clamp(12px, 0.95vw, 15px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--c-primary);
  background: var(--c-primary-bg);
  border: 1px solid rgba(22,163,74,.2);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 32px;
}
[data-theme="dark"] .hero-badge { border-color: rgba(22,163,74,.3); }

.home-hero h1 {
  font-size: clamp(36px, 4vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.4px;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-accent { color: var(--c-primary); }

.home-hero > p {
  font-size: clamp(15px, 1.2vw, 19px);
  color: var(--text-2);
  line-height: 1.8;
  max-width: 520px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.btn-lg {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--r-md);
  font-size: clamp(14px, 1.1vw, 17px);
  font-weight: 600;
  letter-spacing: -.1px;
  text-decoration: none;
  transition: background var(--dur), box-shadow var(--dur-md), transform .12s, border-color var(--dur), color var(--dur);
  cursor: pointer;
}
.btn-lg:hover { text-decoration: none; transform: translateY(-1px); }
.btn-lg svg { display: block; flex-shrink: 0; }

.btn-lg-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(22,163,74,.28);
}
.btn-lg-primary:hover { background: var(--c-primary-h); color: #fff; box-shadow: 0 4px 16px rgba(22,163,74,.38); }

.btn-lg-secondary {
  background: var(--bg-surface);
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-lg-secondary:hover { background: var(--bg-alt); border-color: var(--c-primary); color: var(--c-primary); }

/* Section wrappers */
.home-section { margin-bottom: 60px; }

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(11px, 0.85vw, 13px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .9px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 13px;
  background: var(--c-primary);
  border-radius: 2px;
  flex-shrink: 0;
}

.section-more {
  font-size: clamp(12px, 0.95vw, 14px);
  color: var(--c-primary);
  font-weight: 500;
  text-decoration: none;
  transition: opacity var(--dur);
}
.section-more:hover { opacity: .75; text-decoration: underline; }

/* Hot tools: 4 large vertical cards in a row */
.hot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.hot-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px 22px 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-decoration: none;
  transition: border-color var(--dur), box-shadow var(--dur-md), transform .15s;
  cursor: pointer;
  box-shadow: var(--shadow-card);
}
.hot-card:hover {
  border-color: rgba(22,163,74,.4);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  text-decoration: none;
}

.hot-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--c-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  flex-shrink: 0;
}
.hot-icon svg { display: block; width: 26px; height: 26px; }

.hot-title {
  font-size: clamp(15px, 1.3vw, 21px);
  font-weight: 650;
  color: var(--text);
  letter-spacing: -.2px;
  line-height: 1.3;
}
.hot-desc {
  font-size: clamp(13px, 1.1vw, 17px);
  color: var(--text-2);
  line-height: 1.6;
  margin-top: 4px;
}

/* Category rows (All tools) */
.cat-list {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.cat-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: background var(--dur);
  cursor: pointer;
}
.cat-row:last-child { border-bottom: none; }
.cat-row:hover { background: var(--bg-alt); text-decoration: none; }

.cat-icon-wrap {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--c-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  flex-shrink: 0;
}
.cat-icon-wrap svg { display: block; width: 20px; height: 20px; }

.cat-body { flex: 1; min-width: 0; }
.cat-title {
  font-size: clamp(14px, 1.2vw, 19px);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.1px;
}
.cat-desc {
  font-size: clamp(12px, 1vw, 16px);
  color: var(--text-2);
  margin-top: 3px;
  line-height: 1.45;
}

.cat-count {
  font-size: clamp(12px, 0.9vw, 14px);
  font-weight: 600;
  color: var(--text-3);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
}

.cat-arrow {
  color: var(--text-3);
  flex-shrink: 0;
  transition: transform var(--dur), color var(--dur);
  display: flex;
  align-items: center;
}
.cat-row:hover .cat-arrow { transform: translateX(3px); color: var(--c-primary); }

/* ── Wiki ────────────────────────────────────────── */
.wiki-search-bar {
  position: relative;
  margin-bottom: 16px;
}
.wiki-search-bar input {
  padding-left: 38px;
  font-size: 14.5px;
}
.wiki-search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-3);
  pointer-events: none;
}

.wiki-cat-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.wiki-cat-btn {
  padding: 5px 12px;
  border-radius: 99px;
  font-size: clamp(12px, 0.95vw, 14px);
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  cursor: pointer;
  font-family: var(--font);
  transition: background var(--dur), color var(--dur), border-color var(--dur);
}
.wiki-cat-btn.active {
  background: var(--c-primary);
  color: white;
  border-color: var(--c-primary);
}
.wiki-cat-btn:hover:not(.active) { border-color: var(--c-primary); color: var(--c-primary); }

.wiki-list { display: flex; flex-direction: column; gap: 10px; }
.wiki-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px 18px;
  cursor: pointer;
  transition: border-color var(--dur), box-shadow var(--dur);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: var(--shadow-xs);
}
.wiki-card:hover { border-color: rgba(22,163,74,.35); box-shadow: var(--shadow-md); }
.wiki-card-emoji { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.wiki-card-body { flex: 1; min-width: 0; }
.wiki-card-title { font-size: clamp(14px, 1.2vw, 18px); font-weight: 650; color: var(--text); margin-bottom: 3px; letter-spacing: -.1px; }
.wiki-card-summary { font-size: clamp(12px, 1vw, 15px); color: var(--text-2); line-height: 1.5; }
.wiki-card-tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 7px; }
.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--bg-alt);
  color: var(--text-3);
  border: 1px solid var(--border);
  letter-spacing: .1px;
}
.tag.tag-green {
  background: #f0fdf4;
  color: #15803d;
  border-color: #bbf7d0;
}
.tag.tag-red {
  background: #fef2f2;
  color: #dc2626;
  border-color: #fca5a5;
}
[data-theme="dark"] .tag.tag-green { background: #052e16; color: #4ade80; border-color: #166534; }
[data-theme="dark"] .tag.tag-red   { background: #450a0a; color: #f87171; border-color: #991b1b; }

/* ── Article ─────────────────────────────────────── */
.article-header { margin-bottom: 24px; }
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: clamp(13px, 1vw, 15px);
  color: var(--text-3);
  margin-bottom: 12px;
  cursor: pointer;
}
.article-back:hover { color: var(--c-primary); }
.article-title { font-size: clamp(20px, 1.8vw, 28px); font-weight: 700; letter-spacing: -.4px; color: var(--text); margin-bottom: 8px; }
.article-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.article-body { line-height: 1.8; max-width: 760px; }
.article-body h2 {
  font-size: clamp(16px, 1.3vw, 20px);
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  letter-spacing: -.2px;
}
.article-body h3 {
  font-size: clamp(14px, 1.1vw, 17px);
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 8px;
}
.article-body p { margin-bottom: 12px; color: var(--text-2); }
.article-body ul, .article-body ol {
  margin: 8px 0 12px 20px;
  color: var(--text-2);
}
.article-body li { margin-bottom: 4px; }
.article-body strong { color: var(--text); font-weight: 700; }
.article-body code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: clamp(12px, 0.95vw, 14px);
  color: var(--c-accent);
}
.article-body .info-box {
  background: var(--c-primary-bg);
  border: 1px solid #bbf7d0;
  border-left: 3px solid var(--c-primary);
  border-radius: var(--r-sm);
  padding: 12px 16px;
  margin: 14px 0;
  font-size: clamp(13px, 1vw, 15px);
  color: #166534;
  line-height: 1.6;
}
[data-theme="dark"] .article-body .info-box {
  border-color: #166534;
  border-left-color: var(--c-primary);
  color: #4ade80;
}
.article-body .warning-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 3px solid var(--c-yellow);
  border-radius: var(--r-sm);
  padding: 12px 16px;
  margin: 14px 0;
  font-size: clamp(13px, 1vw, 15px);
  color: #92400e;
  line-height: 1.6;
}
[data-theme="dark"] .article-body .warning-box {
  background: #1c1400;
  border-color: #78350f;
  color: #fbbf24;
}
.article-body .formula-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 18px;
  margin: 14px 0;
  font-family: var(--font-mono);
  font-size: clamp(12px, 0.95vw, 15px);
  color: var(--text);
}
.article-body table { font-size: clamp(13px, 1vw, 15px); margin: 14px 0; }
.article-body table th { font-size: clamp(11px, 0.9vw, 13px); text-align: left; }
.article-body table td { text-align: left; }

/* inline info/warning boxes outside article-body */
.info-box {
  background: var(--c-primary-bg);
  border: 1px solid #bbf7d0;
  border-left: 3px solid var(--c-primary);
  border-radius: var(--r-sm);
  padding: 12px 16px;
  margin: 14px 0;
  font-size: clamp(13px, 1vw, 15px);
  color: #166534;
  line-height: 1.6;
}
[data-theme="dark"] .info-box { border-color: #166534; border-left-color: var(--c-primary); color: #4ade80; }
.warning-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 3px solid var(--c-yellow);
  border-radius: var(--r-sm);
  padding: 12px 16px;
  margin: 14px 0;
  font-size: clamp(13px, 1vw, 15px);
  color: #92400e;
  line-height: 1.6;
}
[data-theme="dark"] .warning-box { background: #1c1400; border-color: #78350f; color: #fbbf24; }
.formula-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: clamp(12px, 0.95vw, 14px);
  color: var(--text-2);
  display: inline-block;
}

/* ── Breadcrumb ───────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-3); text-decoration: none; }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb-sep { font-size: 10px; opacity: .5; }

/* ── Empty / loading ──────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 56px 20px;
  color: var(--text-3);
}
.empty-state svg { margin: 0 auto 14px; display: block; opacity: .3; }
.empty-state p { font-size: 13.5px; }

/* ── Divider ─────────────────────────────────────── */
.divider { height: 1px; background: var(--border); margin: 18px 0; }

/* ── Tooltip ─────────────────────────────────────── */
.tooltip-wrap { position: relative; display: inline-flex; align-items: center; gap: 4px; }
.tooltip-icon { color: var(--text-3); cursor: help; }
.tooltip-text {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg-surface);
  font-size: 12px;
  padding: 5px 9px;
  border-radius: var(--r-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s;
  z-index: 10;
}
.tooltip-wrap:hover .tooltip-text { opacity: 1; }

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 768px) {
  /* Mobile: show hamburger, hide desktop links */
  #menu-toggle { display: flex; }
  .topnav-links { display: none; }
  .topnav-inner { padding: 0 14px; }

  #page-content {
    padding: calc(var(--topnav-h) + 20px) 16px calc(var(--bn-h) + 20px);
  }

  #bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: var(--bn-h);
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    z-index: 100;
  }
  .bn-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--text-3);
    font-size: 11px;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--dur);
    padding-bottom: 2px;
  }
  .bn-item.active { color: var(--c-primary); }
  .bn-item.active svg { stroke: var(--c-primary); }
  .bn-item svg { stroke: var(--text-3); transition: stroke var(--dur); }

  .form-row { flex-direction: column; }
  .form-group { min-width: 0; }

  .result-grid { grid-template-columns: repeat(2, 1fr); }

  /* Mobile hero: left-aligned, compact */
  .home-hero {
    text-align: left;
    padding: 36px 20px 32px;
    margin-bottom: 40px;
  }
  .hero-badge { margin-bottom: 20px; }
  .home-hero h1 { font-size: 30px; letter-spacing: -.6px; margin-bottom: 14px; }
  .home-hero > p { font-size: 14px; margin: 0 0 28px; max-width: none; }
  .hero-actions { justify-content: flex-start; }
  .btn-lg { padding: 11px 20px; font-size: 14px; }

  /* Hot tools: 2×2 grid on mobile */
  .hot-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .hot-card { padding: 20px 16px 18px; gap: 12px; }
  .hot-icon { width: 44px; height: 44px; border-radius: 12px; }
  .hot-icon svg { width: 22px; height: 22px; }
  .hot-title { font-size: 14px; }
  .hot-desc { font-size: 12px; display: none; }

  /* Category rows: hide description, tighter padding */
  .cat-row { padding: 15px 16px; gap: 12px; }
  .cat-icon-wrap { width: 36px; height: 36px; border-radius: 9px; }
  .cat-icon-wrap svg { width: 18px; height: 18px; }
  .cat-title { font-size: 14px; }
  .cat-desc { display: none; }
  .cat-count { display: none; }

  .home-section { margin-bottom: 40px; }
  .section-header { margin-bottom: 14px; }

  .page-title { font-size: 19px; }
  #page-content { padding: 18px 14px calc(var(--bn-h) + 18px); }
}

@media (max-width: 400px) {
  .result-grid { grid-template-columns: 1fr 1fr; }
}

/* ── Animations ───────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.page-enter { animation: fadeIn .2s ease both; }

@media (prefers-reduced-motion: reduce) {
  .page-enter { animation: none; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}

/* ── Print ────────────────────────────────────────── */
@media print {
  #topnav, #bottom-nav { display: none !important; }
  #page-content { padding: 0; }
  .card { break-inside: avoid; box-shadow: none; border: 1px solid #e2e8f0; }
}

/* ── Cost Averaging Rows ─────────────────────────── */
.avg-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.avg-row:last-child { border-bottom: none; }
.avg-row-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--c-primary);
  color: white;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-bottom: 7px;
}
.avg-row-del {
  width: 26px;
  height: 26px;
  border-radius: var(--r-sm);
  background: #fee2e2;
  color: #dc2626;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  flex-shrink: 0;
  margin-bottom: 7px;
  transition: background var(--dur);
  font-family: var(--font);
}
.avg-row-del:hover { background: #fca5a5; }

/* ── K-Line Patterns ─────────────────────────────── */
.kline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(196px, 1fr));
  gap: 10px;
}
.kline-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px;
  cursor: pointer;
  transition: border-color var(--dur), box-shadow var(--dur);
  box-shadow: var(--shadow-xs);
}
.kline-card:hover { border-color: rgba(22,163,74,.35); box-shadow: var(--shadow-md); }
.kline-card-name { font-size: clamp(15px, 1.2vw, 18px); font-weight: 700; color: var(--text); margin-bottom: 4px; letter-spacing: -.1px; }
.kline-svg-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0;
  background: var(--bg-alt);
  border-radius: 8px;
}

/* ── Sector Cards ────────────────────────────────── */
.sector-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color var(--dur), box-shadow var(--dur);
  box-shadow: var(--shadow-xs);
}
.sector-card:hover { border-color: rgba(22,163,74,.35); box-shadow: var(--shadow-sm); }
.sector-header { display: flex; align-items: center; gap: 10px; }
.sector-toggle { font-size: 16px; color: var(--text-3); flex-shrink: 0; }
.sector-body { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.sector-sub { font-size: clamp(12px, 0.95vw, 15px); color: var(--text-2); padding: 4px 0; border-bottom: 1px dashed var(--border); }
.sector-sub:last-child { border-bottom: none; }

/* ── LocalStorage Tool Items ─────────────────────── */
.tool-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
}
.tool-item:last-child { border-bottom: none; }
.tool-item-badge {
  min-width: 50px;
  padding: 3px 8px;
  background: var(--c-primary-bg);
  color: var(--c-primary);
  font-size: clamp(12px, 0.95vw, 14px);
  font-weight: 700;
  border-radius: 6px;
  text-align: center;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.tool-item-del {
  width: 26px;
  height: 26px;
  border-radius: var(--r-sm);
  background: #fee2e2;
  color: #dc2626;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  flex-shrink: 0;
  transition: background var(--dur);
  font-family: var(--font);
}
.tool-item-del:hover { background: #fca5a5; }

/* ── Responsive additions ─────────────────────────── */
@media (max-width: 768px) {
  .kline-grid { grid-template-columns: repeat(2, 1fr); }
  .avg-row { flex-wrap: wrap; }
}