/* Shared accessibility and responsive refinements for the official guide. */
:root {
  --focus: #9ad1ff;
  --content: 1180px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
}

body {
  min-width: 0;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}

.wrap {
  width: min(100% - 28px, var(--content));
  max-width: var(--content);
  padding-inline: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

header {
  box-shadow: 0 8px 24px rgba(0, 0, 0, .28);
}

.hd {
  flex-wrap: wrap;
  min-height: 64px;
}

.brand {
  flex: 0 0 auto;
  line-height: 1.15;
  letter-spacing: 0;
}

nav {
  min-width: 0;
  flex-wrap: wrap;
  overflow-x: visible;
  scrollbar-width: thin;
  overscroll-behavior-inline: contain;
  padding: 4px 0;
}

nav a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.playbar .wrap {
  min-height: 44px;
}

.btn {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.panel {
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .16);
}

.panel-h {
  min-height: 44px;
}

.card {
  border-radius: 8px;
  min-width: 0;
  transition: border-color .16s ease, background-color .16s ease;
}

a.card:hover {
  border-color: #7d6a32;
  background: #202b42;
  text-decoration: none;
}

.card p {
  line-height: 1.65;
}

.tw {
  border: 1px solid var(--line);
  border-radius: 8px;
  scrollbar-color: #52617f #101627;
}

.tw table {
  min-width: 680px;
}

.tw th {
  top: 0;
  z-index: 2;
}

tbody tr:nth-child(even) td {
  background: rgba(255, 255, 255, .015);
}

.searchbar input,
.searchbar select {
  min-height: 44px;
}

.searchbar input::placeholder {
  color: #a7b4ca;
}

.ico {
  flex: none;
}

footer .wrap {
  align-items: center;
}

footer a {
  display: inline-block;
  padding-block: 4px;
}

@media (max-width: 900px) {
  html {
    scroll-padding-top: 130px;
  }

  .hd {
    display: block;
    padding-bottom: 4px;
  }

  .brand {
    padding: 8px 0 5px;
    font-size: 19px;
  }

  nav {
    margin: 0 -14px;
    padding: 4px 14px 8px;
    border-top: 1px solid rgba(143, 160, 191, .14);
  }

  nav a {
    padding-inline: 12px;
  }

  .playbar .wrap > span:last-child {
    width: 100%;
  }

  .cols {
    gap: 0;
  }

  footer .wrap {
    display: block;
    text-align: center;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 14px;
  }

  main {
    padding-top: 16px;
  }

  .playbar {
    padding-block: 8px;
  }

  .playbar .wrap {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .playbar .wrap > span {
    grid-column: 1 / -1;
  }

  .playbar .btn {
    width: 100%;
    padding-inline: 8px;
    font-size: 13px;
  }

  .panel-b {
    padding: 12px;
  }

  .hero {
    min-height: 330px;
  }

  .hero .wrap {
    padding-block: 42px;
  }

  .hero h1 {
    font-size: 34px;
    letter-spacing: 0;
  }

  .hero p br {
    display: none;
  }

  .hero .btns,
  .hero .btn {
    width: 100%;
  }

  h2.sec {
    font-size: 21px;
    letter-spacing: 0;
  }

  .tw {
    margin-inline: -12px;
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }

  th,
  td {
    padding: 8px;
  }

  .toc {
    flex-wrap: wrap;
    overflow-x: visible;
    padding-bottom: 5px;
  }

  .toc a {
    flex: none;
    min-height: 38px;
    display: inline-flex;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card {
    transition: none;
  }
}

/* ==========================================================
   導覽列:「📚 圖鑑 ▾」下拉選單 + 手機漢堡選單
   (沿用站內既有 --gold / --panel / --line 配色)
   ========================================================== */
.burger {
  display: none;
  background: var(--panel2);
  border: 1px solid var(--line);
  color: var(--gold2);
  border-radius: 8px;
  font: 700 20px/1 inherit;
  padding: 0 12px;
  cursor: pointer;
}

.burger:hover {
  background: var(--panel);
  color: var(--gold);
}

nav .navgrp {
  position: relative;
  display: inline-flex;
}

nav .navgrp-btn {
  background: none;
  border: 0;
  font: 700 14px/1 inherit;
  color: var(--tx);
  padding: 7px 13px;
  min-height: 42px;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  white-space: nowrap;
}

nav .navgrp-btn:hover {
  background: var(--panel2);
  color: var(--gold2);
}

nav .navgrp.on > .navgrp-btn {
  background: var(--gold);
  color: #191400;
}

nav .navgrp .caret {
  font-size: 11px;
  transition: transform .15s ease;
}

nav .navgrp.open > .navgrp-btn .caret {
  transform: rotate(180deg);
}

nav .navdrop {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 60;
  min-width: 176px;
  display: none;
  flex-direction: column;
  gap: 2px;
  margin-top: 4px;
  padding: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .5);
}

nav .navgrp.open > .navdrop {
  display: flex;
}

nav .navdrop a {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 700;
  color: var(--tx);
  white-space: nowrap;
}

nav .navdrop a:hover {
  background: var(--panel2);
  color: var(--gold2);
  text-decoration: none;
}

nav .navdrop a.on {
  background: var(--gold);
  color: #191400;
}

/* 桌機:滑鼠移入即展開(觸控裝置不套用,改用點擊) */
@media (hover: hover) and (pointer: fine) and (min-width: 901px) {
  nav .navgrp:hover > .navdrop {
    display: flex;
  }

  nav .navgrp:hover > .navgrp-btn .caret {
    transform: rotate(180deg);
  }
}

/* 手機:漢堡選單 + 圖鑑改為可點開的折疊清單 */
@media (max-width: 900px) {
  .hd {
    position: relative;
  }

  .burger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 9px;
    right: 0;
    min-height: 44px;
    min-width: 48px;
  }

  .brand {
    padding-right: 58px;
  }

  nav {
    display: none;
  }

  nav.open {
    display: flex;
    flex-direction: column;
    /* 必須 nowrap:column + wrap + max-height 會被拆成多欄而爆出畫面 */
    flex-wrap: nowrap;
    align-items: stretch;
    max-height: calc(100vh - 150px);
    overflow-y: auto;
    overflow-x: hidden;
  }

  nav.open > a {
    justify-content: flex-start;
    padding-inline: 12px;
  }

  nav .navgrp {
    display: block;
    width: 100%;
  }

  nav .navgrp-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 10px 12px;
    min-height: 44px;
    font-size: 15px;
  }

  nav .navdrop {
    position: static;
    min-width: 0;
    margin-top: 0;
    padding: 2px 0 6px 16px;
    background: transparent;
    border: 0;
    border-left: 2px solid var(--line);
    margin-left: 12px;
    box-shadow: none;
  }

  nav .navdrop a {
    justify-content: flex-start;
    white-space: normal;
  }
}