:root {
  --bg: #061018;
  --bg-2: #0a1c28;
  --surface: #0e2433;
  --surface-2: #123044;
  --line: rgba(94, 234, 212, 0.16);
  --text: #e7f6f2;
  --muted: #8aa8b0;
  --teal: #2ee6c5;
  --teal-dim: rgba(46, 230, 197, 0.12);
  --amber: #ffb020;
  --coral: #ff6b7a;
  --violet: #b49cff;
  --danger: #ff4d6d;
  --ok: #5dffb1;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --eng: "IBM Plex Sans", "Noto Sans TC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --A: #2ee6c5;
  --B: #ffb020;
  --C: #ff6b7a;
  --D: #b49cff;
  --ALL: #7fd4ff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { background: var(--bg); color-scheme: dark; }
body {
  margin: 0;
  color: var(--text);
  font-family: var(--font);
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(46, 230, 197, 0.08), transparent 55%),
    radial-gradient(900px 500px at 110% 10%, rgba(180, 156, 255, 0.08), transparent 50%),
    var(--bg);
  overflow: hidden;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.rail {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: 7px;
  background: linear-gradient(180deg, var(--teal), #1a6b8a 55%, var(--violet));
  z-index: 5;
}

#app {
  position: relative;
  z-index: 1;
  height: 100%;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  padding-left: 7px;
}

/* HUD */
.hud {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 22px 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.hud-left { display: flex; align-items: center; gap: 10px; color: var(--muted); min-width: 280px; }
.hud-mark {
  color: #041018;
  background: var(--teal);
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.hud-id { color: var(--teal); }
.hud-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--teal); opacity: 0.6; }
.hud-mid { flex: 1; }
.progress {
  display: flex;
  height: 6px;
  gap: 3px;
  border-radius: 99px;
}
.progress span {
  flex: 1;
  background: #163445;
  border-radius: 99px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.progress span.on { background: color-mix(in srgb, var(--c) 55%, #163445); }
.progress span.now::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--c);
  box-shadow: 0 0 10px var(--c);
}
.hud-right { display: flex; align-items: center; gap: 8px; }
.timer {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 4px 6px 4px 10px;
  border-radius: 999px;
}
.timer[data-state="warn"] { border-color: color-mix(in srgb, var(--amber) 50%, transparent); }
.timer[data-state="over"] { border-color: var(--coral); animation: pulse 1s ease-in-out infinite; }
.timer-who { color: var(--muted); font-size: 11px; min-width: 28px; }
.timer-val { font-variant-numeric: tabular-nums; font-weight: 600; font-size: 14px; }
button { font-family: inherit; color: inherit; }
.timer-btn, .icon-btn, .nav-btn, .btn, .mini-btn {
  font-family: inherit;
  cursor: pointer;
  border: 0;
}
.timer-btn {
  background: var(--teal);
  color: #041018;
  font-weight: 700;
  font-size: 11px;
  border-radius: 999px;
  padding: 5px 10px;
}
.icon-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 12px;
}
.icon-btn:hover, .nav-btn:hover { border-color: var(--teal); }

/* locks */
.locks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 4px 22px 8px;
}
.lock {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 12px;
  padding: 7px 12px;
  font-family: inherit;
  opacity: 0.55;
  transition: 0.25s ease;
}
.lock.on {
  opacity: 1;
  color: var(--text);
  border-color: color-mix(in srgb, var(--teal) 45%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--teal) 20%, transparent);
}
.lock-key { font-family: var(--mono); font-size: 11px; color: var(--teal); }
.lock-zh { font-weight: 700; letter-spacing: 0.12em; }
.lock-en { margin-left: auto; font-family: var(--eng); font-size: 12px; color: var(--teal); }

/* stage */
.stage {
  margin: 0 22px;
  min-height: 0;
  background: linear-gradient(180deg, rgba(14,36,51,0.92), rgba(10,24,34,0.92));
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  position: relative;
  outline: none;
  box-shadow: var(--shadow);
}
.slide {
  height: 100%;
  padding: 28px 36px 24px;
  display: flex;
  flex-direction: column;
  animation: rise 0.45s ease;
  overflow: auto;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@keyframes pulse {
  50% { box-shadow: 0 0 0 4px rgba(255, 107, 122, 0.18); }
}

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 8px;
}
.slide h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 3.4vw, 46px);
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1.15;
}
.sub {
  color: var(--muted);
  margin: 0 0 18px;
  font-size: 16px;
}
.term {
  font-family: var(--eng);
  color: var(--teal);
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.term-amber { color: var(--amber); font-family: var(--eng); font-weight: 600; }
.term-coral { color: var(--coral); font-family: var(--eng); font-weight: 600; }

/* dock */
.dock {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 22px 14px;
}
.nav-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px;
}
.nav-btn-next { background: color-mix(in srgb, var(--teal) 16%, var(--surface)); }
.dock-info { display: flex; align-items: center; gap: 10px; min-width: 280px; }
.chip {
  font-family: var(--mono);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.chip[data-p="A"] { color: var(--A); border-color: color-mix(in srgb, var(--A) 40%, transparent); }
.chip[data-p="B"] { color: var(--B); border-color: color-mix(in srgb, var(--B) 40%, transparent); }
.chip[data-p="C"] { color: var(--C); border-color: color-mix(in srgb, var(--C) 40%, transparent); }
.chip[data-p="D"] { color: var(--D); border-color: color-mix(in srgb, var(--D) 40%, transparent); }
.slide-label { color: var(--muted); font-size: 13px; }
.page-num { font-family: var(--mono); color: var(--muted); font-size: 12px; }
.dock-jump { margin-left: auto; display: flex; gap: 6px; }
.jump-btn {
  font-family: var(--mono);
  font-size: 11px;
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
}
.jump-btn:hover, .jump-btn.on { color: var(--text); border-color: var(--line); }

/* cover */
.cover {
  padding: 0;
  position: relative;
  color: white;
}
.cover-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4,14,22,0.88) 0%, rgba(4,14,22,0.55) 55%, rgba(4,14,22,0.25) 100%),
    url("../assets/cyberport.jpg") center/cover no-repeat;
}
.cover-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 3px,
    rgba(46, 230, 197, 0.03) 3px 4px
  );
  pointer-events: none;
}
.cover-inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 48px 48px 40px;
  max-width: 920px;
}
.cover h1 { font-size: clamp(36px, 5vw, 62px); }
.cover-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0 22px; }
.pill {
  font-size: 13px;
  background: rgba(6, 16, 24, 0.55);
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
}
.team-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.team-card {
  background: rgba(6, 16, 24, 0.62);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  min-width: 160px;
  cursor: pointer;
  text-align: left;
}
.team-card b { display: block; }
.team-card span { color: var(--muted); font-size: 12px; }
.team-card[data-p="A"] { border-top: 3px solid var(--A); }
.team-card[data-p="B"] { border-top: 3px solid var(--B); }
.team-card[data-p="C"] { border-top: 3px solid var(--C); }
.team-card[data-p="D"] { border-top: 3px solid var(--D); }
.team-card:hover { border-color: var(--teal); }

/* grids */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; flex: 1; min-height: 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; flex: 1; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; flex: 1; }
.card {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p, .card li { color: #d5ebe6; font-size: 14.5px; line-height: 1.55; }
.card ul { margin: 0; padding-left: 18px; }
.who { font-family: var(--mono); font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.agenda-card {
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s;
  display: flex;
  flex-direction: column;
  min-height: 0;
  text-align: left;
}
.agenda-card:hover { transform: translateY(-3px); }
.agenda-card .mins { margin-top: auto; font-family: var(--mono); color: var(--teal); font-size: 12px; }

/* lists */
.bullets { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.bullets li {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  line-height: 1.5;
}
.bullets li::before {
  content: "▸";
  color: var(--teal);
  margin-right: 8px;
}

/* timeline */
.tl { display: grid; gap: 8px; flex: 1; overflow: auto; }
.tl-item {
  display: grid;
  grid-template-columns: 140px 18px 1fr;
  gap: 12px;
  align-items: stretch;
  cursor: pointer;
}
.tl-date {
  font-family: var(--mono);
  color: var(--teal);
  font-size: 13px;
  padding-top: 10px;
  text-align: right;
}
.tl-dot {
  position: relative;
}
.tl-dot::before {
  content: "";
  position: absolute;
  left: 6px; top: 0; bottom: -8px;
  width: 2px;
  background: #1e4454;
}
.tl-item:last-child .tl-dot::before { display: none; }
.tl-dot::after {
  content: "";
  position: absolute;
  left: 1px; top: 14px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--teal);
}
.tl-body {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
}
.tl-body strong { display: block; margin-bottom: 2px; }
.tl-item.open .tl-body { border-color: var(--teal); }
.tl-extra { display: none; color: var(--muted); font-size: 13px; margin-top: 4px; }
.tl-item.open .tl-extra { display: block; }

/* chain */
.chain {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}
.chain-step {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 12px;
  min-height: 150px;
  opacity: 0.38;
  transform: translateY(8px);
  transition: 0.35s ease;
}
.chain-step.on {
  opacity: 1;
  transform: none;
  border-color: color-mix(in srgb, var(--coral) 50%, var(--line));
}
.num {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--coral);
}
.chain-step h3 { margin: 6px 0; font-size: 16px; }
.chain-step p { margin: 0; color: var(--muted); font-size: 13px; }
.terminal {
  font-family: var(--mono);
  background: #07141c;
  border: 1px solid #1d4a4a;
  border-radius: 12px;
  padding: 12px 14px;
  min-height: 92px;
  font-size: 13px;
  color: #9ff3d8;
  white-space: pre-wrap;
}
.play-row { display: flex; gap: 8px; margin: 4px 0 12px; }
.mini-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 12px;
}
.mini-btn.primary { background: var(--teal); color: #041018; font-weight: 700; border-color: transparent; }

/* gaps */
.gap {
  cursor: pointer;
  min-height: 180px;
  position: relative;
  overflow: hidden;
  text-align: left;
}
.gap .front, .gap .back { transition: 0.25s ease; }
.gap .back { display: none; }
.gap.open .front { display: none; }
.gap.open .back { display: block; }
.gap-idx {
  font-family: var(--mono);
  font-size: 28px;
  color: var(--teal);
  line-height: 1;
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 999px;
  margin-top: 8px;
}
.tag.dpp4 { background: rgba(255,107,122,0.15); color: var(--coral); }
.tag.dpp2 { background: rgba(255,176,32,0.15); color: var(--amber); }

/* dwell */
.days {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 8px;
  margin: 8px 0 14px;
}
.day {
  background: #102230;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 6px;
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.day.hot { background: rgba(255, 77, 109, 0.16); color: var(--coral); border-color: rgba(255,77,109,0.4); }
.day.boom { background: var(--coral); color: #2b0610; font-weight: 700; }

/* stats */
.stat {
  text-align: left;
  padding: 18px;
}
.stat .n {
  font-family: var(--mono);
  font-size: clamp(28px, 4vw, 48px);
  color: var(--teal);
  font-weight: 600;
  line-height: 1;
}
.stat .l { margin-top: 8px; color: var(--muted); }

/* files */
.files { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.file {
  background: #102230;
  border: 1px dashed #2a5a5a;
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  min-height: 92px;
  text-align: left;
}
.file .cls { font-family: var(--mono); font-size: 10px; color: var(--coral); letter-spacing: 0.14em; }
.file.open { border-style: solid; border-color: var(--teal); }
.file h4 { margin: 6px 0 4px; font-size: 14px; }
.file p { margin: 0; font-size: 12px; color: var(--muted); display: none; }
.file.open p { display: block; }

/* compare */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  flex: 1;
}
.split .card h3 { font-size: 18px; }

/* map table */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table th, .table td {
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}
.table th { color: var(--muted); font-weight: 500; font-size: 12px; letter-spacing: 0.08em; }
.table tr { cursor: pointer; }
.table tr.on td { background: rgba(46,230,197,0.06); }

/* quiz */
.quiz-q {
  font-size: 22px;
  font-weight: 700;
  margin: 6px 0 16px;
}
.options { display: grid; gap: 10px; }
.opt {
  text-align: left;
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}
.opt.correct { border-color: var(--ok); background: rgba(93,255,177,0.1); }
.opt.wrong { border-color: var(--coral); background: rgba(255,107,122,0.1); }
.quiz-fb { margin-top: 12px; color: var(--muted); min-height: 24px; }
.score-big {
  font-family: var(--mono);
  font-size: 64px;
  color: var(--teal);
  margin: 8px 0;
}

/* takeaway */
.take {
  background:
    linear-gradient(180deg, rgba(14,36,51,0.4), rgba(6,16,24,0.55)),
    url("../assets/skyline.jpg") center/cover;
  border-radius: 18px;
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px solid var(--line);
}
.take h2 { font-size: clamp(26px, 3vw, 40px); margin: 0 0 18px; }
.lock-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.lock-big {
  background: rgba(6,16,24,0.72);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
}
.lock-big b { display: block; font-size: 22px; letter-spacing: 0.12em; }
.quote {
  font-size: 20px;
  line-height: 1.5;
  background: rgba(6,16,24,0.72);
  border-left: 4px solid var(--teal);
  padding: 14px 16px;
  border-radius: 0 12px 12px 0;
}

/* notes / modal */
.notes {
  position: fixed;
  right: 18px;
  bottom: 72px;
  width: 340px;
  max-height: 46vh;
  overflow: auto;
  background: #07141d;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 14px;
  z-index: 20;
  box-shadow: var(--shadow);
}
.notes-head { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.notes-body { font-size: 14px; line-height: 1.55; }
.modal {
  position: fixed;
  inset: 0;
  background: rgba(2, 8, 12, 0.72);
  display: none;
  place-items: center;
  z-index: 30;
  padding: 20px;
}
.modal.open {
  display: grid;
}
.modal[hidden] {
  display: none !important;
  pointer-events: none;
}
.modal-card {
  background: #0c1f2b;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  max-width: 640px;
  width: 100%;
}
.modal-card h2 { margin: 0 0 8px; }
.lede { color: var(--muted); }
.help-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; margin: 16px 0; }
.help-grid div { display: flex; gap: 6px; align-items: center; font-size: 14px; }
kbd {
  font-family: var(--mono);
  font-size: 11px;
  background: #102634;
  border: 1px solid #2a5560;
  border-bottom-width: 2px;
  padding: 2px 6px;
  border-radius: 6px;
}
.btn {
  background: var(--teal);
  color: #041018;
  font-weight: 800;
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 14px;
}
.help-tip { color: var(--muted); font-size: 13px; }

.insight-banner {
  margin-top: auto;
  background: linear-gradient(90deg, rgba(46,230,197,0.14), rgba(46,230,197,0.04));
  border: 1px solid color-mix(in srgb, var(--teal) 35%, transparent);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 16px;
}

.columns-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; flex: 1; }

.photo-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  min-height: 180px;
  background: url("../assets/cyberport-water.jpg") center/cover;
}

.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 12px;
  font-family: inherit;
  cursor: pointer;
}
.tab.on { color: #041018; background: var(--teal); border-color: transparent; font-weight: 700; }

.scrollish { overflow: auto; }

@media (max-width: 1280px) {
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .chain { grid-template-columns: repeat(3, 1fr); }
  .files, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .days { grid-template-columns: repeat(5, 1fr); }
}

@media (max-height: 760px) {
  .locks { display: none; }
  .slide { padding: 18px 24px 16px; }
  .chain-step { min-height: 120px; }
}

@media (max-width: 980px) {
  body { overflow: auto; }
  #app { height: auto; min-height: 100%; }
  .stage { min-height: 70vh; }
  .grid-2, .grid-3, .grid-4, .grid-5, .split, .chain, .files, .lock-row, .columns-3 {
    grid-template-columns: 1fr;
  }
  .hud { flex-wrap: wrap; }
  .locks { display: none; }
  .cover-inner { padding: 28px 20px; }
  .slide { padding: 20px; }
  .help-grid { grid-template-columns: 1fr; }
  .dock { flex-wrap: wrap; }
  .dock-jump { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}