/* ============================================================
   ToolBox · 工具盒子 — Shared Styles
   ============================================================ */
:root {
  --bg: #0e0d0b;
  --bg-2: #151311;
  --bg-3: #1c1a17;
  --line: rgba(245, 230, 200, 0.08);
  --line-strong: rgba(245, 230, 200, 0.16);
  --text: #f5ecd7;
  --text-dim: rgba(245, 236, 215, 0.68);
  --text-faint: rgba(245, 236, 215, 0.48);
  --accent: #d4940a;
  --accent-soft: rgba(212, 148, 10, 0.10);
  --accent-glow: rgba(212, 148, 10, 0.20);
  --good: #4ade80;
  --bad: #f87171;
  --radius-s: 4px;
  --radius-m: 8px;
  --radius-l: 14px;
  --font-serif: 'Fraunces', 'Georgia', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;
}

/* ====== LIGHT THEME ====== */
:root[data-theme="light"] {
  --bg: #f8f6f1;
  --bg-2: #ffffff;
  --bg-3: #eee9df;
  --line: rgba(40, 30, 10, 0.10);
  --line-strong: rgba(40, 30, 10, 0.18);
  --text: #1a1408;
  --text-dim: rgba(26, 20, 8, 0.65);
  --text-faint: rgba(26, 20, 8, 0.42);
  --accent: #b07808;
  --accent-soft: rgba(176, 120, 8, 0.10);
  --accent-glow: rgba(176, 120, 8, 0.18);
  --good: #16a34a;
  --bad: #dc2626;
}
:root[data-theme="light"] body::before {
  background-image:
    radial-gradient(circle at 15% 20%, rgba(176, 120, 8, 0.04), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(176, 120, 8, 0.03), transparent 45%);
}
:root[data-theme="light"] .nav {
  background: rgba(248, 246, 241, 0.9);
}
:root[data-theme="light"] .btn-primary {
  color: #fff;
}
:root[data-theme="light"] #qr-canvas {
  background: #fff;
  border: 1px solid var(--line-strong);
}
:root[data-theme="light"] .toast {
  background: var(--bg-2);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(212, 148, 10, 0.04), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(212, 148, 10, 0.03), transparent 45%);
  pointer-events: none;
  z-index: 0;
}

/* =============== NAVBAR =============== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 13, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark { font-family: var(--font-serif); font-size: 22px; color: var(--accent); line-height: 1; }
.brand-name { font-family: var(--font-serif); font-weight: 600; font-size: 18px; letter-spacing: -0.01em; }
.brand-tag { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 0.12em; text-transform: uppercase; }
.nav-links { display: flex; gap: 28px; }
.nav-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.nav-link:hover { color: var(--accent); }

/* =============== HERO =============== */
.hero {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  padding: 96px 32px 64px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 60px;
  align-items: center;
  z-index: 1;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent-glow); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(44px, 7vw, 88px);
  line-height: 0.98;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}
.hero-title em { font-style: italic; color: var(--accent); font-weight: 400; }
.hero-sub { font-size: 17px; color: var(--text-dim); max-width: 520px; line-height: 1.7; margin-bottom: 40px; }
.hero-cta { display: flex; gap: 12px; margin-bottom: 56px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 48px; padding-top: 32px; border-top: 1px solid var(--line); }
.stat { display: flex; flex-direction: column; }
.stat-num { font-family: var(--font-serif); font-size: 36px; font-weight: 600; letter-spacing: -0.02em; color: var(--accent); line-height: 1; }
.stat-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 8px; letter-spacing: 0.08em; text-transform: uppercase; }

/* Hero decorative SVG */
.hero-deco { position: relative; display: flex; justify-content: center; align-items: center; opacity: 0.8; }
.deco-svg { width: 100%; max-width: 420px; height: auto; }
.deco-ring { fill: none; stroke: var(--line-strong); stroke-width: 1; }
.deco-ring:nth-child(1) { stroke: rgba(245, 158, 11, 0.4); }
.deco-ring:nth-child(2) { stroke: rgba(245, 158, 11, 0.25); }
.deco-line { stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 4 4; }
.deco-text { font-family: var(--font-serif); font-style: italic; font-size: 64px; fill: var(--accent); font-weight: 400; }

/* =============== TOOL CARDS (Homepage) =============== */
.tool-grid {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 32px 96px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
}
.tool-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  padding: 32px 24px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px -12px rgba(245, 158, 11, 0.15);
}
.tool-card-idx { font-family: var(--font-mono); font-size: 11px; color: var(--accent); letter-spacing: 0.1em; }
.tool-card-name { font-family: var(--font-serif); font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.tool-card-desc { font-size: 13px; color: var(--text-dim); line-height: 1.6; }
.tool-card-arrow { margin-top: auto; font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); transition: color 0.2s; }
.tool-card:hover .tool-card-arrow { color: var(--accent); }

/* =============== TOOL PAGE LAYOUT =============== */
.tool-page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 48px 32px 96px;
  position: relative;
  z-index: 1;
}
.tool-header { margin-bottom: 40px; }
.tool-breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.tool-breadcrumb a { color: var(--text-dim); text-decoration: none; }
.tool-breadcrumb a:hover { color: var(--accent); }
.tool-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.tool-desc { font-size: 16px; color: var(--text-dim); margin-top: 12px; max-width: 640px; line-height: 1.7; }

.tool-body {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  padding: 40px;
}
.tool-body-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
}
.tool-body-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.tool-body-two-col .panel-col textarea { min-height: 280px; }

/* =============== AD SLOT =============== */
.ad-slot { max-width: 1240px; margin: 0 auto; padding: 16px 32px; }
.ad-horizontal { border: 1px dashed var(--line-strong); border-radius: var(--radius-m); padding: 32px; text-align: center; min-height: 100px; background: var(--bg-2); }
.ad-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 8px; }
.ad-in-content { margin: 24px 0; min-height: 90px; border: 1px dashed var(--line-strong); border-radius: var(--radius-m); padding: 16px; text-align: center; background: var(--bg-3); }
.ad-top { margin-top: 24px; margin-bottom: 16px; }
.ad-top > div { min-height: 90px; border: 1px dashed var(--line-strong); border-radius: var(--radius-m); padding: 16px; text-align: center; background: var(--bg-2); }
.ad-bottom { margin-top: 32px; margin-bottom: 16px; }
.ad-bottom > div { min-height: 90px; border: 1px dashed var(--line-strong); border-radius: var(--radius-m); padding: 16px; text-align: center; background: var(--bg-2); }

/* =============== FORM ELEMENTS =============== */
.field-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: -8px; }
.textarea, .input, .select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-s);
  padding: 14px 16px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  transition: border-color 0.2s, background 0.2s;
  resize: vertical;
}
.textarea:focus, .input:focus, .select:focus { outline: none; border-color: var(--accent); background: var(--bg-3); }
.textarea { min-height: 120px; }
.code-area { font-family: var(--font-mono); font-size: 13px; line-height: 1.7; }
.mono-input { font-family: var(--font-mono); font-size: 13px; text-transform: uppercase; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.btn-row { display: flex; gap: 12px; margin-top: 8px; flex-wrap: wrap; }
.btn-row.wrap { flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-s);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
  text-decoration: none;
  background: transparent;
  color: var(--text);
}
.btn-primary { background: var(--accent); color: #1a1207; font-weight: 600; }
.btn-primary:hover { background: #e0a010; transform: translateY(-1px); box-shadow: 0 8px 24px -6px var(--accent-glow); }
.btn-ghost { border-color: var(--line-strong); color: var(--text-dim); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* Status */
.status { font-family: var(--font-mono); font-size: 12px; padding: 8px 0; min-height: 24px; }
.status.good { color: var(--good); }
.status.bad { color: var(--bad); }

/* =============== QR =============== */
.qr-box {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 340px;
}
#qr-canvas { background: #fff; border-radius: var(--radius-s); max-width: 100%; height: auto; }

/* =============== PASSWORD =============== */
.slider-row { display: flex; align-items: center; gap: 16px; }
.slider { flex: 1; accent-color: var(--accent); }
.slider-val { font-family: var(--font-mono); font-size: 22px; color: var(--accent); min-width: 32px; text-align: right; }
.checkboxes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 16px 0; }
.check { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-dim); cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }

/* =============== COUNT STATS =============== */
.stats-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin-top: 24px; }
.stat-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: border-color 0.2s, transform 0.2s;
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.stat-card-num { font-family: var(--font-serif); font-size: 32px; font-weight: 600; color: var(--accent); letter-spacing: -0.02em; line-height: 1; }
.stat-card-label { font-family: var(--font-mono); font-size: 10px; color: var(--text-faint); letter-spacing: 0.08em; text-transform: uppercase; }

/* =============== COLOR =============== */
.color-row { display: flex; gap: 12px; align-items: stretch; }
.color-input { width: 80px; height: 48px; border: 1px solid var(--line-strong); border-radius: var(--radius-s); background: var(--bg); cursor: pointer; padding: 4px; }
.color-row .input { flex: 1; }
.color-values { display: flex; flex-direction: column; gap: 10px; padding: 16px 0; }
.color-val-row { display: flex; align-items: center; gap: 16px; }
.color-val-label { font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); width: 60px; letter-spacing: 0.08em; }
.color-preview { background: var(--accent); border-radius: var(--radius-m); min-height: 200px; border: 1px solid var(--line); transition: background 0.3s; }
.palette { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-m); padding: 20px; }
.palette-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
.palette-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; border-radius: var(--radius-s); overflow: hidden; }
.palette-swatch { height: 60px; cursor: pointer; transition: transform 0.15s; }
.palette-swatch:hover { transform: scaleY(1.1); }

/* =============== ABOUT =============== */
.about { position: relative; z-index: 1; }
.about-inner { max-width: 1240px; margin: 0 auto; padding: 96px 32px; }
.about-text { font-family: var(--font-serif); font-size: clamp(18px, 2vw, 24px); line-height: 1.6; color: var(--text-dim); max-width: 780px; margin-top: 24px; margin-bottom: 56px; }
.about-text strong { color: var(--accent); font-weight: 600; }
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.about-card { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius-l); padding: 32px 28px; transition: border-color 0.2s, transform 0.2s; }
.about-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.about-idx { font-family: var(--font-mono); font-size: 12px; color: var(--accent); letter-spacing: 0.1em; }
.about-h { font-family: var(--font-serif); font-size: 22px; font-weight: 600; letter-spacing: -0.01em; margin: 16px 0 10px; }
.about-p { color: var(--text-dim); font-size: 14px; line-height: 1.7; }

/* =============== FOOTER =============== */
.footer { border-top: 1px solid var(--line); padding: 40px 32px; position: relative; z-index: 1; }
.footer-inner { max-width: 1240px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-brand { font-family: var(--font-serif); font-size: 16px; font-weight: 600; display: flex; align-items: center; gap: 10px; }
.footer-meta { font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }

/* =============== TOAST =============== */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg-3);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 12px 20px;
  border-radius: var(--radius-m);
  font-family: var(--font-mono);
  font-size: 13px;
  animation: toast-in 0.3s ease-out, toast-out 0.3s ease-in 1.7s forwards;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
@keyframes toast-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toast-out { from { opacity: 1; } to { opacity: 0; transform: translateY(-8px); } }

/* =============== PRIVACY PAGE =============== */
.content-page { max-width: 800px; margin: 0 auto; padding: 48px 32px 96px; position: relative; z-index: 1; }
.content-page h1 { font-family: var(--font-serif); font-size: 36px; font-weight: 600; margin-bottom: 24px; }
.content-page h2 { font-family: var(--font-serif); font-size: 22px; font-weight: 600; margin: 32px 0 12px; color: var(--accent); }
.content-page p { color: var(--text-dim); line-height: 1.8; margin-bottom: 16px; }
.content-page ul { color: var(--text-dim); line-height: 1.8; margin-bottom: 16px; padding-left: 24px; }

/* =============== RESPONSIVE =============== */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 64px 20px 80px; gap: 40px; }
  .hero-deco { max-width: 240px; margin: 0 auto; }
  .tool-grid { grid-template-columns: repeat(2, 1fr); padding: 48px 20px; }
  .tool-body { padding: 24px; }
  .tool-body-grid, .tool-body-two-col { grid-template-columns: 1fr; gap: 24px; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-inner { padding: 64px 20px; }
  .nav-inner { padding: 14px 20px; }
  .checkboxes { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .tool-page { padding: 32px 20px 64px; }
}
@media (max-width: 500px) {
  .tool-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 44px; }
}