/* mobile-first. Light mode is blue on near-white; dark mode is a green-black
   forest scheme. Every accent is a variable so no hard-coded hue can survive a
   theme switch. */
:root {
  color-scheme: light dark;
  --page: #e9eef5; --surface: #ffffff;
  --ink: #101826; --ink-2: #46536a; --muted: #7f8b9e;
  --line: #d9e1ec;
  --accent: #2a78d6; --accent-2: #1c5cab; --accent-deep: #0d366b; --accent-ink: #ffffff;
  --hero-ink: #ffffff; --hero-ink-2: #c7dbf5;
  --scrim: 6, 24, 48;
  --shadow: 0 1px 2px rgba(16, 38, 74, .06), 0 6px 20px rgba(16, 38, 74, .07);
  --badge-bg: #fdeee7; --badge-ink: #a33f1c;
  --rest-bg: #fdf4dd; --rest-ink: #7d5c05; --rest-chip: #8a6410;
}
/* Dark values live in a mixin-ish block applied from two scopes: the OS setting
   (unless the reader has explicitly stamped light) and the reader's own choice,
   which must win either way. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page: #080d0a; --surface: #111a14;
    --ink: #e9f2ec; --ink-2: #aec2b5; --muted: #7b8e82;
    --line: #21301f;
    --accent: #2fb178; --accent-2: #1c7a52; --accent-deep: #0a2a1c; --accent-ink: #04170f;
    --hero-ink: #ffffff; --hero-ink-2: #bfe0cd;
    --scrim: 5, 20, 13;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 20px rgba(0, 0, 0, .34);
    --badge-bg: #33220f; --badge-ink: #eeb277;
  --rest-bg: #2b2410; --rest-ink: #e3c069; --rest-chip: #4a3c14;
    --rest-bg: #2b2410; --rest-ink: #e3c069; --rest-chip: #4a3c14;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --page: #080d0a; --surface: #111a14;
  --ink: #e9f2ec; --ink-2: #aec2b5; --muted: #7b8e82;
  --line: #21301f;
  --accent: #2fb178; --accent-2: #1c7a52; --accent-deep: #0a2a1c; --accent-ink: #04170f;
  --hero-ink: #ffffff; --hero-ink-2: #bfe0cd;
  --scrim: 5, 20, 13;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 20px rgba(0, 0, 0, .34);
  --badge-bg: #33220f; --badge-ink: #eeb277;
  --rest-bg: #2b2410; --rest-ink: #e3c069; --rest-chip: #4a3c14;
  color-scheme: dark;
}
/* Theme toggle: the glyph reports the mode you are *in* — sun while light,
   moon while dark. Only one of the two is ever displayed, so the button reads
   as a single control. Every rule here mirrors a palette rule above, so the
   icon can never disagree with the colours on screen. */
.theme-toggle { cursor: pointer; padding: 0; font: inherit; }
.theme-toggle .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: none; }
}
:root[data-theme="dark"] .theme-toggle .i-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: none; }
:root[data-theme="light"] .theme-toggle .i-moon { display: none; }
:root[data-theme="light"] .theme-toggle .i-sun { display: block; }
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--page); color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", sans-serif;
  line-height: 1.55;
}
/* Hero */
.hero {
  position: relative; overflow: hidden; color: var(--hero-ink);
  background: linear-gradient(155deg, var(--accent-deep) 0%, var(--accent-2) 55%, var(--accent) 100%);
}
.hero.has-photo {
  background: var(--accent-deep) center/cover no-repeat;
}
/* The photo rides on the header's own background-image (set inline, so a stale
   cached stylesheet can never leave it stranded in the flow as a loose block). */
/* Scrim only where the text actually sits, so the photograph stays visible */
.hero.has-photo::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, rgba(var(--scrim), .76) 0%, rgba(var(--scrim), .48) 42%,
              rgba(var(--scrim), .16) 68%, rgba(var(--scrim), 0) 100%);
}
/* Actions sit in the flow beside the download button rather than floating in a
   corner, where a wrapped headline used to run underneath them. */
.hero-actions {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  justify-content: space-between;
}
/* Publisher links: frosted discs that read as part of the photo's own UI */
.hero-links { display: flex; gap: 8px; }
.hero-links a, .hero-links button {
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  color: #fff; background: rgba(255, 255, 255, .15);
  border: 1px solid rgba(255, 255, 255, .34);
  -webkit-backdrop-filter: blur(7px); backdrop-filter: blur(7px);
  transition: background .16s ease, transform .16s ease;
}
.hero-links a:focus-visible, .hero-links button:focus-visible {
  outline: 2px solid #fff; outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(var(--scrim), .55);
}
.hero-links a:hover, .hero-links button:hover {
  background: rgba(255, 255, 255, .32); transform: translateY(-2px);
}
.hero-links svg { width: 20px; height: 20px; display: block; }
.foot-links { display: flex; gap: 8px; margin-bottom: 12px; }
.foot-links a {
  width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center;
  color: var(--ink-2); background: var(--surface); border: 1px solid var(--line);
  transition: color .16s ease, border-color .16s ease;
}
.foot-links a:hover { color: var(--accent); border-color: var(--accent); }
.foot-links svg { width: 17px; height: 17px; }
.hero.has-photo h1, .hero.has-photo .sub, .hero.has-photo .hint {
  text-shadow: 0 1px 12px rgba(var(--scrim), .7);
}
/* Soft fade into the page instead of a silhouette — a jagged profile cut over
   a real photograph reads as torn paper, not as mountains. */
.hero.has-photo::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 96px; z-index: 2;
  background: linear-gradient(180deg,
              color-mix(in srgb, var(--page) 0%, transparent) 0%,
              color-mix(in srgb, var(--page) 70%, transparent) 55%, var(--page) 100%);
  pointer-events: none;
}
.hero.has-photo .hero-inner { padding-bottom: 104px; }
.hero-inner { max-width: 960px; margin: 0 auto; padding: 34px 16px 150px; position: relative; z-index: 2; }
/* The name reads whole, but the initials Taiwanese hikers actually say — TMB —
   stay at full strength while the rest of the letters ease back a little. */
.hero h1 {
  font-size: 1.75rem; margin: 0 0 4px; letter-spacing: .01em;
  color: color-mix(in srgb, var(--hero-ink) 62%, transparent);
}
.hero h1 .ini { color: var(--hero-ink); font-weight: 800; }
.hero .sub { color: var(--hero-ink-2); margin: 0 0 18px; font-size: 1rem; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; padding: 0; list-style: none; }
.hero-stats li {
  background: rgba(255, 255, 255, .14); border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 999px; padding: 4px 13px; font-size: .86rem;
  font-variant-numeric: tabular-nums; backdrop-filter: blur(2px);
}
.hero .hint { color: var(--hero-ink-2); font-size: .84rem; margin: -12px 0 16px; }
.dl-all {
  display: inline-block; background: #ffffff; color: var(--accent-deep);
  padding: 11px 20px; border-radius: 12px; text-decoration: none; font-weight: 700;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .18);
}
.ridge { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; height: 150px; display: block; z-index: 0; }
/* Cards */
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px 48px; }
.legend { color: var(--ink-2); font-size: .8rem; margin: 0 0 12px; }
/* Safety notice: uses the hazard tokens already in the palette, so it reads as
   the same family as the per-day caution badges. */
.notice {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--badge-bg); color: var(--badge-ink);
  border-radius: 12px; padding: 12px 14px; margin: 16px 0 14px;
  font-size: .87rem; line-height: 1.62;
}
.notice svg { flex: none; width: 1.2em; height: 1.2em; margin-top: .18em; }
.notice p { margin: 0; }
.howto { margin: 0 0 14px; font-size: .85rem; color: var(--ink-2); }
.howto summary {
  cursor: pointer; color: var(--accent); font-weight: 600;
  list-style-position: inside;
}
.howto p { margin: 8px 0 0 4px; line-height: 1.66; }
.wrap.flow .legend { padding-top: 4px; }
.grid { display: grid; gap: 18px; grid-template-columns: 1fr; position: relative; z-index: 2; }
@media (min-width: 768px) { .grid { grid-template-columns: 1fr 1fr; } }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 16px; display: flex; flex-direction: column; gap: 10px;
  box-shadow: var(--shadow);
}
@media (hover: hover) and (pointer: fine) {
  .card { transition: transform .15s ease, box-shadow .15s ease; }
  .card:hover { transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(16, 38, 74, .09), 0 14px 34px rgba(16, 38, 74, .13); }
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card h2 { font-size: 1.05rem; margin: 0; display: flex; align-items: center; gap: 8px; }
.dnum {
  background: linear-gradient(150deg, var(--accent-deep), var(--accent));
  color: #fff; border-radius: 9px; padding: 3px 9px; font-size: .95rem; letter-spacing: .02em;
}
.dnum.rest-num { background: var(--rest-chip); color: #fff; }
.card .date { color: var(--muted); font-weight: 400; font-size: .88rem; }
.route { margin: 0; color: var(--ink); font-weight: 650; }
.badge {
  background: var(--badge-bg); color: var(--badge-ink);
  font-size: .75rem; padding: 3px 9px; border-radius: 999px; white-space: nowrap;
}
.badge.calm { background: var(--rest-bg); color: var(--rest-ink); }
.thumb {
  width: 100%; height: auto; border-radius: 12px;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; }
.chip {
  background: var(--page); border: 1px solid var(--line); border-radius: 999px;
  padding: 2px 10px; font-size: .82rem; color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.dl {
  align-self: flex-start; background: linear-gradient(150deg, var(--accent), var(--accent-2));
  color: var(--accent-ink); padding: 9px 18px; border-radius: 11px;
  text-decoration: none; font-weight: 650; font-size: .95rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .22);
}
.card.rest { border-style: dashed; }
/* 行前/行後 folds span the grid and open into their own two-column flow */
.phase { grid-column: 1 / -1; }
.phase summary {
  cursor: pointer; color: var(--ink-2); font-size: .9rem;
  padding: 8px 6px; border-radius: 10px;
}
.phase summary:hover { background: var(--surface); }
.phase-days { display: grid; gap: 12px; margin-top: 8px; }
@media (min-width: 768px) { .phase-days { grid-template-columns: 1fr 1fr; } }
.card.rest .note { color: var(--ink-2); font-size: .92rem; margin: 0; }
/* Photo strip */
.shots { margin-top: 34px; }
.shots h2 { font-size: 1.05rem; margin: 0 0 4px; }
.shots .lead { color: var(--ink-2); font-size: .88rem; margin: 0 0 14px; }
.shots-grid { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 768px) { .shots-grid { grid-template-columns: 1fr 1fr; } }
.shot { margin: 0; }
.shot img {
  width: 100%; height: 220px; object-fit: cover; display: block;
  border-radius: 14px; border: 1px solid var(--line); box-shadow: var(--shadow);
}
.shot figcaption { color: var(--muted); font-size: .8rem; margin-top: 6px; }
.site-foot {
  margin-top: 32px; padding-top: 14px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: .8rem;
}
.site-foot a { color: inherit; }

/* ---- Friendly reading (opt-in) -------------------------------------------
   Nothing above this line changes: with no data-size attribute the page is
   pixel-for-pixel the default design. These steps are percentages of the
   reader's own browser default, so someone who already enlarged text
   system-wide gets this on top of it instead of having it overwritten. Type,
   line-height and tap targets grow; the column width deliberately does not,
   so lines stay a comfortable length rather than running edge to edge. */
:root[data-size="l"] { font-size: 112.5%; }
:root[data-size="xl"] { font-size: 125%; }
:root[data-size="l"] body, :root[data-size="xl"] body { line-height: 1.68; }
:root[data-size="l"] .hero-links a, :root[data-size="l"] .hero-links button {
  width: 43px; height: 43px;
}
:root[data-size="xl"] .hero-links a, :root[data-size="xl"] .hero-links button {
  width: 47px; height: 47px;
}
:root[data-size="l"] .hero-links svg { width: 22px; height: 22px; }
:root[data-size="xl"] .hero-links svg { width: 24px; height: 24px; }
:root[data-size="l"] .foot-links a, :root[data-size="xl"] .foot-links a {
  width: 38px; height: 38px;
}
:root[data-size="l"] .foot-links svg, :root[data-size="xl"] .foot-links svg {
  width: 20px; height: 20px;
}
.size-toggle { cursor: pointer; padding: 0; font: inherit; }
/* Download feedback: phones acknowledge a download with almost nothing, so
   people tap again and save five copies. One quiet toast per tap. */
.toast {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%) translateY(8px);
  background: var(--ink); color: var(--surface); border-radius: 12px;
  padding: 10px 18px; font-size: .88rem; line-height: 1.5; max-width: 88vw;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .25); opacity: 0; pointer-events: none;
  transition: opacity .25s ease, transform .25s ease; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
/* Webviews that cannot download at all (FB, IG…) get a standing notice */
.iab-warn {
  background: var(--badge-bg); color: var(--badge-ink);
  padding: 10px 16px; font-size: .85rem; line-height: 1.6; text-align: center;
}

/* Route switcher panel: in the content flow, not a dropdown — .hero clips
   overflow for the photo, and pushing content down reads plainer than a cover. */
.routes-panel {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 10px; margin: 16px 0 4px; box-shadow: var(--shadow);
  display: grid; gap: 8px;
}
.routes-panel[hidden] { display: none; }
.routes-head { margin: 2px 4px 2px; font-size: .8rem; color: var(--muted); }
.route {
  display: flex; gap: 12px; align-items: center; padding: 8px;
  border-radius: 11px; text-decoration: none; color: inherit;
}
a.route:hover { background: var(--page); }
.route img {
  width: 96px; height: 62px; object-fit: cover; border-radius: 8px; flex: none;
  background: var(--page);
}
.route strong { display: block; font-size: .98rem; }
.route span { display: block; font-size: .82rem; color: var(--ink-2); }
.route .route-stats { color: var(--muted); font-variant-numeric: tabular-nums; }
.route.cur { background: var(--page); }