:root {
  --ink: #3f2832;
  --ink-soft: #6b4f57;
  --paper: #fbf1dc;
  --paper-2: #f3e2c0;
  --wood: #b86f50;
  --wood-dark: #743f39;
  --grass: #8fc65a;
  --accent: #e4654f;
  --sky: #4a90b8;
  --pixel: "Silkscreen", "Noto Sans TC", system-ui, sans-serif;
  --body: "Noto Sans TC", system-ui, -apple-system, "PingFang TC", sans-serif;
  --gutter: 16px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: #6aa84f;
  color: var(--ink);
  font-family: var(--body);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

#game {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh; height: 100dvh;
  display: block;
  image-rendering: pixelated;
  touch-action: none;
  cursor: pointer;
}

/* ---------- buttons ---------- */
.btn, .btn-icon {
  font: 700 14px/1 var(--body);
  color: var(--ink);
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 6px;
  padding: 9px 14px;
  box-shadow: 0 3px 0 var(--ink);
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover, .btn-icon:hover { background: #fff8e8; }
.btn:active, .btn-icon:active { transform: translateY(3px); box-shadow: 0 0 0 var(--ink); }
.btn:focus-visible, .btn-icon:focus-visible, .close:focus-visible { outline: 3px solid var(--sky); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #ef7863; }
.btn-icon { padding: 8px 10px; }

/* ---------- HUD ---------- */
.hud {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; align-items: center; gap: 12px;
  padding: max(10px, env(safe-area-inset-top)) var(--gutter) 10px;
  pointer-events: none;
  z-index: 5;
}
.hud > * { pointer-events: auto; }
.hud-name {
  display: flex; flex-direction: column;
  background: var(--paper); border: 3px solid var(--ink); border-radius: 6px;
  padding: 6px 12px; box-shadow: 0 3px 0 var(--ink);
}
.hud-name strong { font: 400 18px/1.1 var(--pixel); }
.hud-name span { font-size: 12px; color: var(--ink-soft); }
.hud-progress {
  display: flex; gap: 4px; align-items: center;
  background: rgba(63, 40, 50, .78); color: #fff;
  border-radius: 6px; padding: 6px 10px;
  font: 700 13px/1 var(--body);
}
.hud-progress .dot { width: 12px; height: 12px; border-radius: 3px; background: rgba(255,255,255,.25); }
.hud-progress .dot.on { background: #ffd35c; }
.hud-progress .label { margin-left: 6px; }
.hud-actions { margin-left: auto; display: flex; gap: 8px; }

.prompt {
  position: fixed; left: 50%; bottom: 72px; transform: translateX(-50%);
  background: var(--ink); color: #fff;
  font: 500 15px/1.3 var(--body);
  padding: 8px 14px; border-radius: 6px; z-index: 4;
  pointer-events: none; text-align: center; max-width: calc(100vw - 32px);
}
.prompt kbd {
  display: inline-block; background: var(--paper); color: var(--ink);
  border-radius: 4px; padding: 1px 6px; margin: 0 2px; font: inherit;
}
.hint {
  position: fixed; left: var(--gutter); bottom: 12px; z-index: 3;
  font: 500 12px/1.3 var(--body); color: #fff;
  background: rgba(63, 40, 50, .6); padding: 5px 9px; border-radius: 5px;
  transition: opacity .6s;
}
.hint.fade { opacity: 0; }
.credit {
  position: fixed; right: var(--gutter); bottom: 12px; z-index: 3;
  font-size: 11px; color: #fff; background: rgba(63, 40, 50, .5);
  padding: 4px 8px; border-radius: 5px;
}
.credit a { color: #ffe9a8; }

/* ---------- touch controls ---------- */
.touch { display: none; }
@media (pointer: coarse) {
  .touch { display: block; }
  .hint, .credit { display: none; }
  .dpad {
    position: fixed; left: var(--gutter); bottom: calc(18px + env(safe-area-inset-bottom));
    width: 138px; height: 138px; z-index: 4;
    display: grid; grid-template: repeat(3, 1fr) / repeat(3, 1fr);
  }
  .dpad button, .abtn {
    background: rgba(251, 241, 220, .85); color: var(--ink);
    border: 3px solid var(--ink); border-radius: 8px; font-size: 16px;
    touch-action: none; user-select: none; -webkit-user-select: none;
  }
  .dpad button.held, .abtn.held { background: #ffd35c; }
  .dpad [data-dir=up] { grid-area: 1 / 2; }
  .dpad [data-dir=left] { grid-area: 2 / 1; }
  .dpad [data-dir=right] { grid-area: 2 / 3; }
  .dpad [data-dir=down] { grid-area: 3 / 2; }
  .abtn {
    position: fixed; right: var(--gutter); bottom: calc(40px + env(safe-area-inset-bottom));
    width: 64px; height: 64px; border-radius: 50%; z-index: 4;
    font: 400 22px/1 var(--pixel);
  }
  .prompt { bottom: calc(170px + env(safe-area-inset-bottom)); }
}

/* ---------- overlays & panel ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  padding: var(--gutter);
  background: rgba(40, 26, 32, .45);
}
.overlay[hidden] { display: none; }
.panel {
  position: relative;
  width: min(720px, 100%); max-height: calc(100dvh - 32px);
  overflow: auto;
  background: var(--paper);
  border: 4px solid var(--ink); border-radius: 10px;
  box-shadow: 0 6px 0 var(--ink), inset 0 0 0 4px var(--paper-2);
  padding: 28px 28px 24px;
  animation: pop .18s ease-out;
}
@keyframes pop { from { transform: scale(.94); opacity: 0; } }
.close {
  position: sticky; float: right; top: 0; margin: -12px -12px 0 8px;
  width: 36px; height: 36px; border-radius: 6px;
  border: 3px solid var(--ink); background: var(--paper-2); color: var(--ink);
  font: 400 16px/1 var(--pixel); cursor: pointer; z-index: 1;
}
.panel h2 { font: 700 26px/1.25 var(--body); margin: 0 0 2px; }
.panel .sub { margin: 0 0 18px; color: var(--ink-soft); font-size: 14px; }
.panel .sub b { color: var(--wood-dark); }
.panel h3 { font: 700 17px/1.35 var(--body); margin: 20px 0 6px; }
.panel h3 a { color: inherit; text-decoration-color: var(--wood); text-underline-offset: 3px; }
.panel p { margin: 0 0 10px; line-height: 1.75; font-size: 15px; }
.panel ul { margin: 6px 0 10px; padding-left: 1.2em; line-height: 1.7; font-size: 15px; }
.panel li::marker { color: var(--wood); }
.card {
  background: #fff9ec; border: 2px solid #e2c99c; border-radius: 8px;
  padding: 14px 16px; margin: 12px 0;
}
.card h3 { margin-top: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 2px; padding: 0; list-style: none; }
.chips li {
  font-size: 12.5px; line-height: 1; padding: 6px 9px;
  background: var(--paper-2); border-radius: 999px; border: 1.5px solid #d9bf8f;
}
.chips.strong li { background: var(--ink); color: #fff; border-color: var(--ink); }
.links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.links a { text-decoration: none; }
.timeline { list-style: none; padding: 0; margin: 8px 0; }
.timeline li { display: grid; grid-template-columns: 56px 1fr; gap: 10px; padding: 6px 0; border-bottom: 1px dashed #dcc39a; }
.timeline b { font-family: var(--pixel); color: var(--wood-dark); }
.panel-foot { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; font-size: 13px; color: var(--ink-soft); }

/* ---------- intro ---------- */
.intro { background: rgba(40, 26, 32, .35); }
.intro-card { text-align: center; width: min(520px, 100%); padding: 32px 26px 24px; }
.intro-card .eyebrow { font: 400 14px/1 var(--pixel); color: var(--ink-soft); margin: 0 0 6px; letter-spacing: .08em; }
.intro-card h1 { font: 400 44px/1.05 var(--pixel); margin: 0 0 14px; color: var(--wood-dark); }
.intro-card .lead { font-size: 16px; }
.intro-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin: 18px 0 14px; }
.intro-card .small { font-size: 12.5px; color: var(--ink-soft); margin: 0; }

@media (max-width: 640px) {
  .hud { flex-wrap: wrap; gap: 8px; }
  .hud-name strong { font-size: 16px; }
  .hud-progress { order: 3; }
  .btn { font-size: 13px; padding: 8px 10px; }
  .panel { padding: 22px 18px 18px; }
  .panel h2 { font-size: 22px; }
  .intro-card h1 { font-size: 36px; }
  .timeline li { grid-template-columns: 48px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .panel { animation: none; }
}

/* ---------- speech bubble ---------- */
.bubble {
  position: fixed; z-index: 6; transform: translate(-50%, -100%);
  width: max-content; max-width: min(280px, calc(100vw - 32px));
  background: #fff; color: var(--ink);
  border: 3px solid var(--ink); border-radius: 10px;
  padding: 10px 30px 10px 12px; font-size: 14.5px; line-height: 1.6;
  box-shadow: 0 3px 0 var(--ink); cursor: pointer;
}
.bubble[hidden] { display: none; }
.bubble::after {
  content: ""; position: absolute; left: 50%; bottom: -11px; margin-left: -8px;
  border: 8px solid transparent; border-top-color: var(--ink); border-bottom: 0;
}
.bubble .more { position: absolute; right: 10px; bottom: 8px; font-size: 11px; color: var(--wood); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: .2; } }
.panel .chips { padding-left: 0; }

/* ---------- intro contact & language ---------- */
.intro-card { position: relative; }
.intro-lang { position: absolute; top: 12px; right: 12px; font-size: 12px; padding: 6px 9px; }
a.btn { display: inline-flex; align-items: center; text-decoration: none; }
.intro-contact {
  margin: 4px 0 14px; padding: 12px 14px; background: var(--paper-2);
  border: 2px dashed #d9bf8f; border-radius: 8px;
}
.contact-mail { display: inline-block; font-weight: 700; color: var(--ink); font-size: 15px; text-decoration: none; margin-bottom: 8px; word-break: break-all; }
.contact-mail:hover { text-decoration: underline; }
.contact-row { display: flex; flex-wrap: wrap; gap: 6px 14px; justify-content: center; align-items: center; font-size: 14px; }
.contact-row a { color: var(--wood-dark); font-weight: 600; text-underline-offset: 3px; }
.contact-row a.dl {
  background: var(--ink); color: #fff; text-decoration: none; border-radius: 5px; padding: 5px 10px; font-size: 13px;
}
.lead-note { background: #fff4d6; border-left: 4px solid #e4a72b; padding: 8px 12px; border-radius: 4px; }

/* ---------- case study ---------- */
.figure { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0 6px; }
.figure figure { margin: 0; }
.figure svg { display: block; width: 100%; height: auto; border-radius: 6px; border: 2px solid var(--ink); }
.figure figcaption { font-size: 13px; margin-top: 6px; color: var(--ink-soft); line-height: 1.4; }
.decision h3 { display: flex; gap: 8px; align-items: center; }
.decision .num {
  flex: none; width: 24px; height: 24px; border-radius: 50%; background: var(--accent); color: #fff;
  font: 700 13px/24px var(--body); text-align: center;
}
.decision p { margin-bottom: 4px; }
.decision .why { color: var(--ink-soft); }
.flow { list-style: none; padding: 0; margin: 8px 0 12px; display: flex; flex-wrap: wrap; gap: 6px; counter-reset: step; }
.flow li {
  counter-increment: step; background: var(--paper-2); border: 1.5px solid #d9bf8f; border-radius: 999px;
  padding: 5px 12px 5px 6px; font-size: 13.5px; display: flex; align-items: center; gap: 6px;
}
.flow li::before {
  content: counter(step); width: 20px; height: 20px; border-radius: 50%; background: var(--ink); color: #fff;
  font-size: 11px; display: grid; place-items: center;
}
@media (max-width: 520px) { .figure { grid-template-columns: 1fr; } }