/* ==========================================================================
   順手工具箱 — 共用樣式
   設計系統：暖白底 + 燒橘主色 + 深青次色
   ========================================================================== */

:root {
  --bg: #fbfaf8;
  --bg-sunk: #f2efe9;
  --surface: #ffffff;
  --surface-2: #f8f6f2;
  --border: #e4dfd6;
  --border-strong: #cfc8ba;

  --ink: #1c1a17;
  --ink-2: #4a453d;
  --ink-3: #7a7266;

  --brand: #e8562a;
  --brand-ink: #b83d16;
  --brand-wash: #fdeee8;
  --accent: #1e4d5c;
  --accent-wash: #e6eff1;

  --ok: #2f7d4f;
  --warn: #b8860b;
  --danger: #c0392b;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;

  --shadow-1: 0 1px 2px rgba(28, 26, 23, .05);
  --shadow-2: 0 4px 14px rgba(28, 26, 23, .08);
  --shadow-3: 0 12px 32px rgba(28, 26, 23, .12);

  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Roboto Mono", "Courier New", monospace;

  --wrap: 1140px;
  --header-h: 60px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17161a;
    --bg-sunk: #101013;
    --surface: #201f24;
    --surface-2: #26252b;
    --border: #35333b;
    --border-strong: #4a4752;

    --ink: #f0ede8;
    --ink-2: #c2bcb3;
    --ink-3: #8e877e;

    --brand: #ff7a52;
    --brand-ink: #ff9877;
    --brand-wash: #33201a;
    --accent: #7fc4d8;
    --accent-wash: #1b2c32;

    --ok: #6ec48e;
    --warn: #dfb45b;
    --danger: #ef7a6c;

    --shadow-1: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow-2: 0 4px 14px rgba(0, 0, 0, .35);
    --shadow-3: 0 12px 32px rgba(0, 0, 0, .45);
  }
}

:root[data-theme="dark"] {
  --bg: #17161a;
  --bg-sunk: #101013;
  --surface: #201f24;
  --surface-2: #26252b;
  --border: #35333b;
  --border-strong: #4a4752;

  --ink: #f0ede8;
  --ink-2: #c2bcb3;
  --ink-3: #8e877e;

  --brand: #ff7a52;
  --brand-ink: #ff9877;
  --brand-wash: #33201a;
  --accent: #7fc4d8;
  --accent-wash: #1b2c32;

  --ok: #6ec48e;
  --warn: #dfb45b;
  --danger: #ef7a6c;

  --shadow-1: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-2: 0 4px 14px rgba(0, 0, 0, .35);
  --shadow-3: 0 12px 32px rgba(0, 0, 0, .45);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--brand-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.25rem); }
h2 { font-size: clamp(1.25rem, 1.05rem + .8vw, 1.5rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--brand); color: #fff; padding: 10px 16px; z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header__bar {
  display: flex; align-items: center; gap: 16px;
  height: var(--header-h);
}

.brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 800; font-size: 1.05rem; color: var(--ink);
  text-decoration: none; white-space: nowrap; letter-spacing: -.02em;
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 28px; height: 28px; flex: none;
  display: grid; place-items: center;
  background: var(--brand); color: #fff;
  border-radius: 8px; font-size: 15px;
  transform: rotate(-4deg);
}

.hsearch { position: relative; flex: 1 1 auto; max-width: 420px; margin-left: auto; }
.hsearch input {
  width: 100%; height: 38px;
  padding: 0 14px 0 36px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink); font: inherit; font-size: .92rem;
}
.hsearch input::placeholder { color: var(--ink-3); }
.hsearch input:focus { border-color: var(--brand); outline: none; box-shadow: 0 0 0 3px var(--brand-wash); }
.hsearch__icon {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  color: var(--ink-3); pointer-events: none; font-size: .95rem;
}

.hsearch__results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-3);
  max-height: 60vh; overflow-y: auto; padding: 6px; z-index: 60;
}
.hsearch__results a {
  display: block; padding: 8px 12px; border-radius: var(--radius-sm);
  color: var(--ink); font-size: .9rem; text-decoration: none;
}
.hsearch__results a:hover,
.hsearch__results a.is-active { background: var(--brand-wash); color: var(--brand-ink); }
.hsearch__results .muted { color: var(--ink-3); font-size: .82rem; margin-left: 6px; }
.hsearch__results .empty { padding: 12px; color: var(--ink-3); font-size: .9rem; }

.theme-toggle {
  flex: none; width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--border-strong); border-radius: 50%;
  background: var(--surface); color: var(--ink-2);
  cursor: pointer; font-size: 15px; line-height: 1;
}
.theme-toggle:hover { border-color: var(--brand); color: var(--brand); }

/* category strip
   分類數量會隨著工具增加而變多，所以寬螢幕允許換行，
   窄螢幕才改成橫向捲動，並在右側加漸層提示還有更多。 */
.catnav {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: relative;
}
.catnav__inner {
  display: flex; gap: 4px;
  flex-wrap: wrap;
  padding-block: 6px;
}
.catnav a {
  flex: none; padding: 6px 13px; border-radius: 999px;
  font-size: .87rem; color: var(--ink-2); text-decoration: none; white-space: nowrap;
}

@media (max-width: 860px) {
  .catnav__inner {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    /* 讓最後一項不會被右側漸層蓋住 */
    padding-right: 34px;
  }
  .catnav__inner::-webkit-scrollbar { display: none; }

  .catnav::after {
    content: "";
    position: absolute; top: 0; bottom: 0; right: 0;
    width: 40px; pointer-events: none;
    background: linear-gradient(to right, transparent, var(--surface) 70%);
  }
}
.catnav a:hover { background: var(--surface-2); color: var(--ink); text-decoration: none; }
.catnav a.is-active { background: var(--brand); color: #fff; }

/* ---------- hero ---------- */
.hero { padding: 48px 0 28px; text-align: center; }
.hero h1 { margin-bottom: .3em; }
.hero p { color: var(--ink-2); max-width: 46ch; margin-inline: auto; font-size: 1.02rem; }
.hero__count {
  display: inline-block; margin-top: 4px;
  background: var(--accent-wash); color: var(--accent);
  padding: 3px 12px; border-radius: 999px;
  font-size: .82rem; font-weight: 600;
}

/* ---------- tool grid ---------- */
.group { margin-bottom: 44px; scroll-margin-top: calc(var(--header-h) + 60px); }
.group__head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 14px; }
.group__head h2 { margin: 0; }
.group__head span { color: var(--ink-3); font-size: .85rem; }

.grid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}

.card {
  display: flex; flex-direction: column; gap: 4px;
  padding: 15px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  color: var(--ink); text-decoration: none;
  transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-color: var(--brand);
  text-decoration: none;
}
.card__top { display: flex; align-items: center; gap: 9px; }
.card__icon { font-size: 1.15rem; line-height: 1; flex: none; }
.card__title { font-weight: 700; font-size: .98rem; }
.card__desc { color: var(--ink-3); font-size: .84rem; line-height: 1.55; }

.no-result { padding: 40px 0; text-align: center; color: var(--ink-3); }

/* ---------- tool page ---------- */
.crumb { font-size: .84rem; color: var(--ink-3); padding: 18px 0 0; }
.crumb a { color: var(--ink-3); }
.crumb a:hover { color: var(--brand); }
.crumb span { margin: 0 6px; opacity: .6; }

.tool-head { padding: 10px 0 22px; }
.tool-head h1 { display: flex; align-items: center; gap: 12px; margin-bottom: .25em; }
.tool-head h1 .emoji { font-size: 1.1em; line-height: 1; }
.tool-head .lede { color: var(--ink-2); max-width: 62ch; margin: 0; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  padding: 24px;
  margin-bottom: 28px;
}
@media (max-width: 560px) { .panel { padding: 18px 15px; } }

.panel--flat { box-shadow: none; background: var(--surface-2); }

.panel__title {
  font-weight: 700; font-size: .95rem; color: var(--ink-2);
  margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}

/* form controls */
.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field > label,
.label {
  display: block; font-size: .87rem; font-weight: 600;
  color: var(--ink-2); margin-bottom: 6px;
}
.hint { font-size: .8rem; color: var(--ink-3); margin-top: 5px; }

input[type="text"], input[type="number"], input[type="password"],
input[type="url"], input[type="date"], input[type="time"], input[type="search"],
textarea, select {
  width: 100%;
  padding: 9px 12px;
  font: inherit; font-size: .95rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
}
textarea { resize: vertical; min-height: 130px; line-height: 1.6; }
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-wash);
}
input[type="range"] { width: 100%; accent-color: var(--brand); }
input[type="color"] { width: 54px; height: 38px; padding: 3px; cursor: pointer; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--brand); width: 16px; height: 16px; }

.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > * { flex: 1 1 160px; min-width: 0; }
.row--tight { gap: 8px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 9px 18px;
  font: inherit; font-size: .92rem; font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--brand); color: #fff;
  cursor: pointer; white-space: nowrap;
  transition: filter .14s ease, transform .1s ease;
}
.btn:hover { filter: brightness(1.07); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn--ghost { background: transparent; color: var(--ink-2); border-color: var(--border-strong); }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); filter: none; }
.btn--sm { padding: 6px 12px; font-size: .84rem; }
.btn--lg { padding: 12px 26px; font-size: 1rem; }
.btn--block { width: 100%; }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* chip / segmented */
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  padding: 5px 13px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: var(--surface);
  color: var(--ink-2); font-size: .85rem; cursor: pointer; font-family: inherit;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.is-on { background: var(--brand); border-color: var(--brand); color: #fff; }

/* output blocks */
.out {
  background: var(--bg-sunk);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: var(--mono); font-size: .9rem;
  white-space: pre-wrap; word-break: break-all;
  min-height: 52px; margin: 0;
}
.out--big {
  font-size: clamp(1.8rem, 1rem + 4vw, 3rem);
  font-weight: 800; text-align: center;
  font-family: var(--font); letter-spacing: -.02em;
  padding: 26px 14px; word-break: normal;
}
.out--empty { color: var(--ink-3); font-style: normal; }

.stat-row { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); }
.stat {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px; text-align: center;
}
.stat__num { font-size: 1.45rem; font-weight: 800; color: var(--brand); line-height: 1.2; }
.stat__label { font-size: .78rem; color: var(--ink-3); margin-top: 2px; }

table.data { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.data th, table.data td { padding: 9px 10px; border-bottom: 1px solid var(--border); text-align: left; }
table.data th { color: var(--ink-2); font-weight: 600; background: var(--surface-2); }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.note {
  background: var(--accent-wash);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px; font-size: .89rem; color: var(--ink-2);
}
.note strong { color: var(--ink); }
.note--warn { background: var(--brand-wash); border-left-color: var(--brand); }

/* copyable grid (symbols / emoji) */
.pick-grid {
  display: grid; gap: 6px;
  grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
}
.pick {
  aspect-ratio: 1; display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); font-size: 1.35rem; cursor: pointer;
  transition: transform .1s ease, border-color .1s ease;
  font-family: inherit; color: var(--ink); padding: 0;
}
.pick:hover { border-color: var(--brand); background: var(--brand-wash); transform: scale(1.06); }
.pick--wide { aspect-ratio: auto; padding: 10px 8px; font-size: .95rem; word-break: break-all; }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px);
  background: var(--ink); color: var(--bg);
  padding: 10px 20px; border-radius: 999px;
  font-size: .88rem; font-weight: 600;
  opacity: 0; pointer-events: none; z-index: 99;
  transition: opacity .2s ease, transform .2s ease;
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* tool page content sections */
.prose { max-width: 70ch; }
.prose h2 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1em; }
.prose li { margin-bottom: .4em; }
.prose code {
  background: var(--bg-sunk); padding: 2px 6px;
  border-radius: 4px; font-family: var(--mono); font-size: .88em;
}

.faq details {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 8px; background: var(--surface);
}
.faq summary {
  padding: 12px 16px; cursor: pointer; font-weight: 600;
  font-size: .93rem; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "＋"; color: var(--brand); margin-right: 8px; font-weight: 700; }
.faq details[open] summary::before { content: "－"; }
.faq .a { padding: 0 16px 14px; color: var(--ink-2); font-size: .91rem; }

.related { margin-top: 12px; }

/* ---------- 廣告版位 ----------
   預留固定高度是關鍵：廣告載入前後版面高度不變，
   才不會造成內容位移（CLS），那會直接拖累 Core Web Vitals。 */
.ad-slot {
  display: block;
  position: relative;
  margin: 30px 0;
  padding: 22px 12px 12px;
  min-height: 268px;                 /* 250 廣告高度 + 標籤與內距 */
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.ad-slot__label {
  position: absolute; top: 6px; left: 12px;
  font-size: .7rem; letter-spacing: .05em;
  color: var(--ink-3);
}
.ad-slot .adsbygoogle { width: 100%; }

@media (max-width: 560px) {
  .ad-slot { min-height: 300px; }    /* 手機版位通常較高 */
}

@media print {
  .ad-slot { display: none !important; }
}

/* ---------- footer ---------- */
.site-footer {
  margin-top: 56px; padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
  font-size: .87rem; color: var(--ink-3);
}
.site-footer__cols {
  display: grid; gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin-bottom: 24px;
}
.site-footer h4 { font-size: .85rem; color: var(--ink-2); margin-bottom: 8px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 5px; }
.site-footer a { color: var(--ink-3); }
.site-footer a:hover { color: var(--brand); }
.site-footer__base {
  padding-top: 18px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}

/* ---------- utilities ---------- */
.mt-0 { margin-top: 0; } .mt-1 { margin-top: 10px; } .mt-2 { margin-top: 20px; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 10px; } .mb-2 { margin-bottom: 20px; }
.tc { text-align: center; }
.muted { color: var(--ink-3); }
.small { font-size: .85rem; }
.mono { font-family: var(--mono); }
.hidden { display: none !important; }
.nowrap { white-space: nowrap; }

@media (max-width: 640px) {
  .site-header__bar { gap: 10px; }
  .brand span:not(.brand__mark) { display: none; }
  .hero { padding: 30px 0 20px; }
}

@media print {
  .site-header, .catnav, .site-footer, .btn, .theme-toggle { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}