:root {
  color-scheme: light;
  --color-canvas: #efe1bd;
  --color-surface: #fff9e9;
  --color-surface-muted: #e7d2a3;
  --color-ink: #2b2118;
  --color-ink-muted: #594633;
  --color-border: #765433;
  --color-brand: #162822;
  --color-brand-soft: #203c32;
  --color-primary: #92382d;
  --color-primary-dark: #67251e;
  --color-secondary: #235e4a;
  --color-focus: #0d6070;
  --color-gold: #d6aa50;
  --color-track: #d8bd87;
  --c-deepfake: #4c4e98;
  --c-verify: #24678b;
  --c-algo: #2f7655;
  --c-scam: #a8442e;
  --c-privacy: #315c50;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-1: 0 3px 0 rgb(43 33 24 / 20%);
  --shadow-2: 0 10px 30px rgb(43 33 24 / 16%), 0 4px 0 rgb(43 33 24 / 15%);
  --focus-ring: 0 0 0 3px var(--color-surface), 0 0 0 6px var(--color-focus);
  --motion-fast: 120ms;
  --motion-normal: 220ms;
  --ease-out: cubic-bezier(.2, .8, .2, 1);
  --ad-header-offset: calc(184px + env(safe-area-inset-top, 0px));
  font-family: ui-rounded, "PingFang TC", "Noto Sans TC", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--ad-header-offset);
}

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  color: var(--color-ink);
  background:
    radial-gradient(circle at 12% 8%, rgb(255 249 233 / 92%) 0 10rem, transparent 28rem),
    radial-gradient(circle at 90% 25%, rgb(55 100 76 / 12%), transparent 34rem),
    linear-gradient(180deg, #f7edcf 0%, var(--color-canvas) 58%, #dfc68e 100%);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

body::before,
body::after {
  position: fixed;
  inset: auto 0 0;
  height: 22vh;
  content: "";
  pointer-events: none;
  z-index: -1;
}

body::before {
  opacity: .14;
  background:
    linear-gradient(145deg, transparent 0 47%, var(--color-brand) 48% 54%, transparent 55%) 0 100% / 34% 100% repeat-x;
  mask-image: linear-gradient(to top, #000, transparent);
}

body::after {
  height: 100%;
  opacity: .2;
  background-image: radial-gradient(rgb(118 84 51 / 45%) .55px, transparent .75px);
  background-size: 7px 7px;
  mix-blend-mode: multiply;
}

img { max-width: 100%; }

a { color: inherit; }

button,
input,
label,
select,
textarea { font: inherit; }

button,
a { touch-action: manipulation; }

h1,
h2,
h3,
p { margin-top: 0; }

h1,
h2 {
  margin-bottom: var(--space-3);
  font-size: clamp(2rem, 6vw, 3.3rem);
  line-height: 1.12;
  letter-spacing: .04em;
}

h3 {
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  line-height: 1.35;
}

.ad-skip-link {
  position: fixed;
  top: calc(8px + env(safe-area-inset-top, 0px));
  left: calc(8px + env(safe-area-inset-left, 0px));
  z-index: 9999;
  min-height: 44px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: #fff;
  background: var(--color-brand);
  transform: translateY(-150%);
}

.ad-skip-link:focus { transform: translateY(0); }

.ad-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding:
    calc(10px + env(safe-area-inset-top, 0px))
    calc(14px + env(safe-area-inset-right, 0px))
    8px
    calc(14px + env(safe-area-inset-left, 0px));
  color: var(--color-surface);
  background:
    linear-gradient(135deg, rgb(255 255 255 / 6%), transparent 36%),
    var(--color-brand);
  border-bottom: 3px solid var(--color-gold);
  box-shadow: 0 6px 24px rgb(22 40 34 / 22%);
}

.ad-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  min-height: 48px;
  color: inherit;
  text-decoration: none;
}

.ad-brand__seal {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ad-brand__eyebrow,
.ad-brand__title { display: block; }

.ad-brand__eyebrow {
  color: #dac994;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
}

.ad-brand__title {
  font-size: 1.22rem;
  font-weight: 900;
  letter-spacing: .12em;
  line-height: 1.15;
}

.ad-nav { margin-top: 7px; }

.ad-nav__group {
  display: flex;
  gap: 8px;
}

.ad-nav__core {
  justify-content: space-between;
}

.ad-nav__realms {
  position: relative;
  margin: 7px -14px -8px;
  padding: 7px 14px 10px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-padding-inline: 14px;
  scroll-snap-type: inline proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--color-gold) rgb(0 0 0 / 20%);
  background:
    linear-gradient(90deg, rgb(255 255 255 / 10%), transparent 24px) left / 32px 100% no-repeat,
    linear-gradient(270deg, rgb(214 170 80 / 24%), transparent 28px) right / 40px 100% no-repeat,
    rgb(0 0 0 / 14%);
}

.ad-nav__realms::-webkit-scrollbar { height: 4px; }
.ad-nav__realms::-webkit-scrollbar-thumb { background: var(--color-gold); border-radius: 99px; }

.ad-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 11px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: #f8efd7;
  font-size: .82rem;
  font-weight: 700;
  line-height: 1.15;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--motion-fast), color var(--motion-fast), transform var(--motion-fast);
}

.ad-nav__realms .ad-nav__link { scroll-snap-align: start; }

.ad-nav__core .ad-nav__link { flex: 1; }

.ad-nav__link:hover { background: rgb(255 255 255 / 10%); }

.ad-nav__link:active { transform: translateY(2px); }

.ad-nav__link.is-active {
  color: var(--color-brand);
  background: var(--color-gold);
  border-color: #f5d98e;
}

.ad-nav__link.is-active::after {
  position: absolute;
  bottom: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.ad-main {
  width: min(100%, 1080px);
  min-height: 68vh;
  margin: 0 auto;
  padding:
    24px
    calc(16px + env(safe-area-inset-right, 0px))
    calc(72px + env(safe-area-inset-bottom, 0px))
    calc(16px + env(safe-area-inset-left, 0px));
  outline: none;
}

.ad-main:focus-visible { box-shadow: inset var(--focus-ring); }

.ad-main h1:focus,
.ad-main h2:focus {
  outline: none;
  text-decoration: underline 3px var(--color-gold);
  text-underline-offset: .18em;
}

.ad-main > :is(
  .ad-hero,
  .ad-rank-card,
  .ad-onboarding,
  .ad-section-heading,
  .ad-theme-grid,
  .ad-theme-hero,
  .ad-case-list,
  .ad-scenario,
  .ad-clue-list,
  .ad-game-panel,
  .ad-badge-grid,
  .ad-stats-grid,
  .ad-transfer-panel,
  .ad-guide-grid,
  .ad-privacy-summary,
  .ad-reset-panel,
  .ad-fieldwork,
  .ad-reflection
) {
  animation: ad-rise var(--motion-normal) var(--ease-out) both;
}

.ad-kicker {
  margin-bottom: 7px;
  color: var(--color-primary);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.ad-page-lead {
  max-width: 46rem;
  color: var(--color-ink-muted);
  font-size: 1.08rem;
  line-height: 1.75;
  text-wrap: pretty;
}

.ad-hero {
  position: relative;
  display: grid;
  overflow: hidden;
  margin-bottom: var(--space-5);
  border: 2px solid #73532e;
  border-radius: var(--radius-lg);
  background: #10261f;
  box-shadow: var(--shadow-2);
  isolation: isolate;
}

.ad-hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  border: 7px double rgb(221 181 94 / 48%);
  border-radius: calc(var(--radius-lg) - 3px);
  content: "";
  pointer-events: none;
}

.ad-hero__image {
  grid-area: 1 / 1;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: 67% center;
}

.ad-hero__copy {
  z-index: 1;
  margin: -24px 12px 12px;
  padding: 22px 18px;
  color: var(--color-ink);
  background: rgb(255 249 233 / 94%);
  border: 1px solid rgb(118 84 51 / 48%);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 26px rgb(16 28 23 / 28%);
  backdrop-filter: blur(8px);
}

.ad-hero__copy h1 { margin-bottom: 12px; }

.ad-hero__lead {
  max-width: 38rem;
  color: #463629;
  font-size: 1.02rem;
}

.ad-hero__rule {
  margin: 12px 0 0;
  color: var(--color-ink-muted);
  font-size: .86rem;
}

.ad-hero__cta { width: 100%; }

.ad-rank-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2px 12px;
  margin-bottom: var(--space-7);
  padding: 16px 18px;
  color: #fff9e9;
  background: linear-gradient(135deg, var(--color-brand-soft), var(--color-brand));
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.ad-rank-card__label {
  grid-column: 1 / -1;
  color: #dbc98c;
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .14em;
}

.ad-rank-card strong { font-size: 1.35rem; }

.ad-rank-card__points {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.ad-rank-card__next {
  grid-column: 1 / -1;
  color: #dbc98c;
  font-size: .82rem;
}

.ad-onboarding {
  scroll-margin-top: 180px;
  margin-bottom: var(--space-7);
  padding: 22px;
  background: rgb(255 249 233 / 90%);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.ad-onboarding h2 { font-size: clamp(1.65rem, 5vw, 2.4rem); }

.ad-learning-loop {
  display: grid;
  gap: 10px;
  margin: 18px 0 20px;
  padding: 0;
  list-style: none;
  counter-reset: learning-step;
}

.ad-learning-loop li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 2px 10px;
  padding: 12px;
  background: #f5e8c8;
  border-radius: var(--radius-sm);
  counter-increment: learning-step;
}

.ad-learning-loop li::before {
  display: grid;
  grid-row: 1 / 3;
  width: 30px;
  height: 30px;
  place-items: center;
  color: #fff;
  background: var(--color-secondary);
  border-radius: 50%;
  content: counter(learning-step);
  font-weight: 900;
}

.ad-learning-loop span { color: var(--color-ink-muted); }

.ad-section-heading {
  margin: var(--space-6) 0 var(--space-4);
}

.ad-section-heading h3 { margin: 0; }

.ad-theme-grid,
.ad-case-list,
.ad-clue-list,
.ad-record-list {
  padding: 0;
  list-style: none;
}

.ad-theme-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.ad-theme-card {
  --theme-accent: var(--color-secondary);
  min-width: 0;
  background: var(--color-surface);
  border: 2px solid var(--theme-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: transform var(--motion-normal) var(--ease-out), box-shadow var(--motion-normal);
}

.ad-theme-card--deepfake { --theme-accent: var(--c-deepfake); }
.ad-theme-card--verify { --theme-accent: var(--c-verify); }
.ad-theme-card--algo { --theme-accent: var(--c-algo); }
.ad-theme-card--scam { --theme-accent: var(--c-scam); }
.ad-theme-card--privacy { --theme-accent: var(--c-privacy); }

.ad-theme-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
  width: calc((100% - 12px) / 2);
  justify-self: center;
}

.ad-theme-card a {
  display: flex;
  height: 100%;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
}

.ad-theme-card img {
  display: block;
  width: 100%;
  height: auto;
  flex: 0 0 auto;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--theme-accent);
}

.ad-theme-card__copy {
  display: flex;
  min-width: 0;
  padding: 12px;
  flex-direction: column;
}

.ad-theme-card__realm,
.ad-theme-card__tier {
  color: var(--theme-accent);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .08em;
}

.ad-theme-card strong {
  margin: 3px 0 6px;
  font-size: 1rem;
  line-height: 1.35;
}

.ad-theme-card__blurb {
  display: none;
  color: var(--color-ink-muted);
  font-size: .88rem;
}

.ad-theme-card__tier { margin-top: auto; padding-top: 8px; }

.ad-theme-hero {
  --theme-accent: var(--color-secondary);
  display: grid;
  gap: 18px;
  margin-bottom: var(--space-7);
  padding: 18px;
  background: rgb(255 249 233 / 88%);
  border: 2px solid var(--theme-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
}

.ad-theme-hero--deepfake { --theme-accent: var(--c-deepfake); }
.ad-theme-hero--verify { --theme-accent: var(--c-verify); }
.ad-theme-hero--algo { --theme-accent: var(--c-algo); }
.ad-theme-hero--scam { --theme-accent: var(--c-scam); }
.ad-theme-hero--privacy { --theme-accent: var(--c-privacy); }

.ad-theme-hero__image {
  display: block;
  width: min(68vw, 260px);
  height: auto;
  aspect-ratio: 1;
  margin: 0 auto;
  align-self: start;
  object-fit: cover;
  border: 4px solid var(--theme-accent);
  border-radius: 32% 68% 56% 44% / 48% 42% 58% 52%;
  box-shadow: 0 12px 30px color-mix(in srgb, var(--theme-accent) 30%, transparent);
}

.ad-theme-hero__copy { align-self: center; }
.ad-theme-hero__copy > p:not(.ad-kicker) { color: var(--color-ink-muted); }

.ad-action-row {
  display: flex;
  gap: 10px;
  flex-direction: column;
}

.ad-button,
.ad-file-label,
.ad-mode-button,
.ad-nav__more {
  display: inline-flex;
  min-width: 48px;
  min-height: 48px;
  margin: 6px 0;
  padding: 11px 16px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-1);
  transition: transform var(--motion-fast), box-shadow var(--motion-fast), background var(--motion-fast);
}

.ad-button:hover,
.ad-file-label:hover,
.ad-mode-button:hover,
.ad-nav__more:hover { filter: brightness(1.04); }

.ad-button:active,
.ad-file-label:active,
.ad-mode-button:active,
.ad-nav__more:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgb(43 33 24 / 16%);
}

.ad-button[aria-pressed="true"],
.ad-mode-button[aria-pressed="true"] {
  color: #fff;
  background: var(--color-secondary);
  border-color: #153f32;
  box-shadow: inset 0 2px 0 rgb(0 0 0 / 18%), var(--shadow-1);
}

.ad-button--primary {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary-dark);
}

.ad-button--secondary,
.ad-file-label {
  color: var(--color-secondary);
  background: var(--color-surface);
  border-color: var(--color-secondary);
}

.ad-option {
  width: 100%;
  justify-content: flex-start;
  color: var(--color-ink);
  background: #fffdf4;
  text-align: left;
}

.ad-option:hover:not(:disabled) {
  color: #14392e;
  background: #e8f2e9;
  border-color: var(--color-secondary);
}

.ad-option.is-correct {
  color: #123d2e;
  border-color: #267151;
  background: #dff0df;
  box-shadow: inset 5px 0 0 #267151;
}

.ad-option.is-wrong {
  color: #5f2118;
  border-color: #a8442e;
  background: #f6ded5;
  box-shadow: inset 5px 0 0 #a8442e;
}

.ad-button:disabled {
  cursor: not-allowed;
  opacity: 1;
  color: #5b5044;
  background: #e8dfcb;
  border-color: #8b7a64;
  box-shadow: none;
  filter: saturate(.65);
}

.ad-option.is-correct:disabled,
.ad-option.is-wrong:disabled {
  opacity: 1;
  filter: none;
}

.ad-option.is-correct:disabled {
  color: #123d2e;
  border-color: #267151;
  background: #dff0df;
  box-shadow: inset 5px 0 0 #267151;
}

.ad-option.is-wrong:disabled {
  color: #5f2118;
  border-color: #a8442e;
  background: #f6ded5;
  box-shadow: inset 5px 0 0 #a8442e;
}

.ad-button:focus-visible,
.ad-file-label:focus-within,
.ad-mode-button:focus-visible,
.ad-nav__more:focus-visible,
.ad-nav__link:focus-visible,
.ad-brand:focus-visible,
.ad-theme-card a:focus-visible,
.ad-case-link:focus-visible,
.ad-feedback:focus-visible,
.ad-reflection:focus-within,
#gc-visitors:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.ad-case-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.ad-case-link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 12px;
  min-height: 72px;
  padding: 14px 16px;
  align-items: center;
  color: inherit;
  background: rgb(255 249 233 / 88%);
  border: 1px solid rgb(118 84 51 / 62%);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: 0 4px 14px rgb(43 33 24 / 9%);
  transition: transform var(--motion-fast), border-color var(--motion-fast);
}

.ad-case-link:hover { transform: translateY(-2px); border-color: var(--color-primary); }

.ad-case-link strong {
  overflow-wrap: anywhere;
  font-size: 1.02rem;
}

.ad-case-link__level {
  grid-row: 1 / 3;
  padding: 4px 8px;
  color: var(--color-primary-dark);
  background: #f1d7c3;
  border-radius: var(--radius-pill);
  font-size: .72rem;
  font-weight: 900;
}

.ad-case-link__go {
  color: var(--color-ink-muted);
  font-size: .78rem;
}

.ad-case-link__recommend {
  width: fit-content;
  padding: 2px 8px;
  color: #fff;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: .72rem;
  font-weight: 900;
}

.ad-fieldwork-list { align-items: stretch; }

.ad-fieldwork-list > li { min-width: 0; }

.ad-fieldwork-link {
  grid-template-areas:
    "duration title"
    "duration theme"
    ". action";
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto 1fr;
  height: 100%;
  align-items: start;
  gap: 4px 12px;
}

.ad-fieldwork-link .ad-case-link__level {
  grid-area: duration;
  align-self: start;
  white-space: nowrap;
}

.ad-fieldwork-link__title {
  grid-area: title;
  line-height: 1.4;
}

.ad-fieldwork-link__theme {
  grid-area: theme;
  color: var(--color-ink-muted);
}

.ad-fieldwork-link .ad-case-link__go {
  grid-area: action;
  align-self: end;
  padding-top: 10px;
  font-weight: 800;
}

@media (min-width: 640px) {
  .ad-fieldwork-link__title { min-block-size: 2.8em; }
}

.ad-scenario,
.ad-game-panel,
.ad-transfer-panel {
  padding: 18px;
  background: rgb(255 249 233 / 94%);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
}

.ad-scenario {
  position: relative;
  max-width: min(48rem, 70ch);
  padding: 28px clamp(18px, 3vw, 26px) 22px;
  font-size: clamp(1rem, 1.7vw, 1.08rem);
  line-height: 1.85;
  letter-spacing: .01em;
  text-wrap: pretty;
}

.ad-scenario::before {
  position: absolute;
  top: 9px;
  left: 18px;
  width: 42px;
  height: 3px;
  border-radius: 4px;
  background: var(--color-primary);
  content: "";
}

.ad-scenario__paragraph {
  max-width: 68ch;
  margin: 0;
}

.ad-scenario__paragraph + .ad-scenario__paragraph {
  margin-top: 1em;
  padding-top: .85em;
  border-top: 1px dashed rgb(118 84 51 / 42%);
}

.ad-scenario strong,
.ad-scenario mark {
  color: var(--color-primary-dark);
  background: linear-gradient(transparent 62%, rgb(214 170 80 / 36%) 62%);
}

.ad-subheading { margin: 28px 0 10px; }

.ad-clue-list {
  display: grid;
  gap: 8px;
  max-width: min(48rem, 70ch);
  margin: 0 0 28px;
}

.ad-clue-list li {
  position: relative;
  padding: 10px 12px 10px 42px;
  background: rgb(255 249 233 / 70%);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
}

.ad-clue-list li::before {
  position: absolute;
  top: 10px;
  left: 12px;
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  color: #fff;
  background: var(--color-secondary);
  border-radius: 50%;
  content: "?";
  font-size: .78rem;
  font-weight: 900;
}

.ad-game-panel {
  width: min(100%, 760px);
  margin-top: 18px;
  scroll-margin-top: calc(var(--ad-header-offset) + 12px);
}

.ad-question {
  margin-bottom: 16px;
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.7;
  white-space: pre-line;
}

.ad-feedback {
  margin: 16px 0 8px;
  padding: 12px 14px;
  color: #392b1f;
  background: #efe0b9;
  border-left: 5px solid var(--color-gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.ad-feedback:focus-visible { border-radius: var(--radius-sm); }

.ad-feedback.is-correct { background: #dff0df; border-left-color: #267151; }
.ad-feedback.is-wrong { background: #f6ded5; border-left-color: #a8442e; }
.ad-feedback p:last-child { margin-bottom: 0; }

.ad-reward-note {
  color: var(--color-secondary);
  font-weight: 800;
}

.ad-technique-lesson {
  margin: 16px 0;
  padding: 14px;
  background: #f5e8c8;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
}

.ad-technique-lesson ul { margin: 8px 0 16px; padding-left: 22px; }
.ad-technique-lesson p { margin: 8px 0 12px; }
.ad-source-note { color: var(--color-ink-muted); font-size: .84rem; }
.ad-outcome-actions { margin-top: 18px; }
.ad-lock-panel ul { padding-left: 22px; }

.ad-mode-switcher {
  display: flex;
  width: fit-content;
  max-width: 100%;
  margin: 0 0 20px;
  padding: 4px;
  gap: 4px;
  overflow-x: auto;
  background: rgb(231 210 163 / 76%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: inset 0 1px 3px rgb(43 33 24 / 14%);
  scrollbar-width: thin;
}

.ad-mode-button {
  min-height: 44px;
  margin: 0;
  padding: 8px 14px;
  flex: 0 0 auto;
  color: var(--color-ink);
  background: transparent;
  border-color: transparent;
  border-radius: var(--radius-pill);
  box-shadow: none;
  white-space: nowrap;
}

.ad-guide-grid,
.ad-capability-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 14px;
  margin: 20px 0;
  padding: 0;
  list-style: none;
}

.ad-hero__actions { margin: 14px 0 8px; }

.ad-hero__actions .ad-button { margin: 0; }

.ad-usage-steps {
  display: grid;
  gap: 10px;
  padding-left: 24px;
}

.ad-usage-steps li { padding-left: 6px; }

.ad-guide-grid--audiences > li {
  display: flex;
  flex-direction: column;
}

.ad-guide-grid--audiences .ad-button {
  width: fit-content;
  margin-top: auto;
}

.ad-feature-guide {
  display: grid;
  grid-template-columns: minmax(7rem, .32fr) 1fr;
  gap: 0;
  margin: 0;
  border: 1px solid rgb(118 84 51 / 48%);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.ad-feature-guide dt,
.ad-feature-guide dd {
  margin: 0;
  padding: 12px 14px;
  border-bottom: 1px solid rgb(118 84 51 / 32%);
}

.ad-feature-guide dt {
  color: var(--color-primary-dark);
  background: rgb(231 210 163 / 56%);
  font-weight: 900;
}

.ad-feature-guide dd { background: rgb(255 253 244 / 76%); }

.ad-feature-guide > :nth-last-child(-n + 2) { border-bottom: 0; }

.ad-guide-note {
  border-left: 7px solid var(--color-gold);
  background: linear-gradient(135deg, rgb(255 249 233 / 96%), rgb(231 210 163 / 58%));
}

@media (max-width: 520px) {
  .ad-feature-guide { grid-template-columns: 1fr; }
  .ad-feature-guide dt { border-bottom: 0; }
  .ad-feature-guide > :nth-last-child(2) { border-bottom: 0; }
}

.ad-privacy-summary,
.ad-reset-panel,
.ad-fieldwork,
.ad-reflection {
  width: min(100%, 760px);
  margin: 20px 0;
  padding: clamp(16px, 3vw, 22px);
  background: rgb(255 249 233 / 94%);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.ad-privacy-summary {
  border-left: 7px solid var(--color-secondary);
  background: linear-gradient(135deg, rgb(223 240 223 / 82%), rgb(255 249 233 / 96%));
}

.ad-reset-panel {
  border-style: dashed;
  border-color: var(--color-primary);
  background: rgb(246 222 213 / 58%);
}

.ad-fieldwork {
  border-color: var(--color-secondary);
  background: linear-gradient(145deg, rgb(255 249 233 / 96%), rgb(231 210 163 / 64%));
}

.ad-reflection {
  border-left: 7px solid var(--color-gold);
}

.ad-evidence-card,
.ad-guide-grid > *,
.ad-capability-list > * {
  min-width: 0;
  padding: 16px;
  color: var(--color-ink);
  background: rgb(255 253 244 / 92%);
  border: 1px solid rgb(118 84 51 / 58%);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgb(43 33 24 / 9%);
}

.ad-evidence-card {
  position: relative;
  padding-left: 48px;
}

.ad-evidence-card::before {
  position: absolute;
  top: 16px;
  left: 14px;
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: #fff;
  background: var(--color-secondary);
  border-radius: 50%;
  content: "✓";
  font-weight: 900;
}

.ad-capability-list li::marker { color: var(--color-primary); }

.ad-privacy-summary > :last-child,
.ad-reset-panel > :last-child,
.ad-fieldwork > :last-child,
.ad-reflection > :last-child,
.ad-evidence-card > :last-child { margin-bottom: 0; }

.ad-progress-label {
  margin-bottom: 8px;
  color: var(--color-ink-muted);
  font-size: .84rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
}

.ad-game-panel > .ad-progress-label:first-child {
  position: sticky;
  top: calc(var(--ad-header-offset) + 8px);
  z-index: 20;
  width: fit-content;
  min-height: 44px;
  margin: -8px 0 8px -8px;
  padding: 10px 12px;
  align-content: center;
  color: var(--color-primary-dark);
  background: rgb(255 249 233 / 96%);
  border: 1px solid rgb(118 84 51 / 55%);
  border-radius: var(--radius-pill);
  box-shadow: 0 5px 18px rgb(43 33 24 / 14%);
  backdrop-filter: blur(10px);
}

.ad-game-panel > .ad-progress-label:first-child + .ad-progress {
  position: sticky;
  top: calc(var(--ad-header-offset) + 58px);
  z-index: 19;
  margin: -1px 0 18px;
  box-shadow: 0 4px 12px rgb(43 33 24 / 12%);
}

.ad-sticky-progress {
  position: sticky;
  top: calc(var(--ad-header-offset) + 8px);
  z-index: 30;
  display: grid;
  grid-template-columns: auto minmax(80px, 1fr);
  gap: 6px 14px;
  width: min(100%, 760px);
  min-height: 52px;
  margin: 12px 0 18px;
  padding: 9px 12px;
  align-items: center;
  color: var(--color-ink);
  background: rgb(255 249 233 / 96%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 22px rgb(43 33 24 / 16%);
  backdrop-filter: blur(10px);
}

.ad-sticky-progress .ad-progress {
  margin: 0;
}

.ad-progress-note {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--color-ink-muted);
  font-size: .88rem;
  line-height: 1.45;
}

.ad-progress {
  height: 12px;
  margin: -1px 0 18px;
  overflow: hidden;
  background: var(--color-track);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
}

.ad-progress__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), #e4a841);
  transform-origin: left;
  transition: transform var(--motion-normal) var(--ease-out);
}

.ad-battle-guardian {
  display: block;
  width: min(52vw, 220px);
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border: 4px solid var(--color-primary);
  border-radius: 50%;
  box-shadow: var(--shadow-2);
}

.ad-badge-grid,
.ad-stats-grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.ad-badge-card,
.ad-stat-card {
  padding: 18px;
  background: rgb(255 249 233 / 92%);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.ad-badge-card h3,
.ad-stat-card h3 { margin-bottom: 10px; }

.ad-record-list { margin: 0; }
.ad-record-list li { padding: 7px 0; border-top: 1px dashed #c7ab75; }

.ad-stat-card { border-top: 7px solid var(--color-secondary); }
.ad-stat-card--deepfake { border-top-color: var(--c-deepfake); }
.ad-stat-card--verify { border-top-color: var(--c-verify); }
.ad-stat-card--algo { border-top-color: var(--c-algo); }
.ad-stat-card--scam { border-top-color: var(--c-scam); }
.ad-stat-card--privacy { border-top-color: var(--c-privacy); }

.ad-stat-card strong { display: block; color: var(--color-primary); font-size: 1.15rem; }
.ad-stat-card p { margin: 8px 0 0; color: var(--color-ink-muted); }
.ad-stat-card span { color: var(--color-ink-muted); font-size: .84rem; }

.ad-transfer-panel {
  display: grid;
  width: min(100%, 620px);
  min-width: 0;
  gap: 10px;
  max-width: 620px;
  margin-top: 28px;
}

.ad-file-input {
  width: 100%;
  min-width: 0;
  min-height: 48px;
  max-width: 100%;
  padding: 10px;
  color: var(--color-ink);
  background: #fffdf4;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.ad-game-panel label {
  display: inline-flex;
  min-height: 44px;
  margin: 8px 0 5px;
  align-items: center;
  color: var(--color-ink);
  font-weight: 800;
}

.ad-game-panel select,
.ad-game-panel input[type="text"],
.ad-game-panel textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 12px;
  color: var(--color-ink);
  background: #fffdf4;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 2px 5px rgb(43 33 24 / 8%);
  scroll-margin-top: calc(var(--ad-header-offset) + 16px);
  scroll-margin-bottom: 32vh;
}

.ad-game-panel select { max-width: 24rem; }

.ad-game-panel textarea {
  display: block;
  min-height: 132px;
  resize: vertical;
  line-height: 1.65;
}

.ad-game-panel textarea::placeholder { color: #735e47; opacity: 1; }

.ad-game-panel select:focus-visible,
.ad-game-panel input[type="text"]:focus-visible,
.ad-game-panel textarea:focus-visible,
.ad-file-input:focus-visible {
  outline: none;
  border-color: var(--color-focus);
  box-shadow: var(--focus-ring);
}

.ad-transfer-panel > * {
  max-width: 100%;
  overflow-wrap: anywhere;
}

.ad-import-message { margin-top: 12px; font-weight: 800; }

.ad-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding:
    18px
    calc(16px + env(safe-area-inset-right, 0px))
    calc(64px + env(safe-area-inset-bottom, 0px))
    calc(16px + env(safe-area-inset-left, 0px));
  color: var(--color-ink-muted);
  font-size: .82rem;
}

.ad-footer__links a,
.ad-source-note a,
.ad-legal a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-focus);
  font-weight: 800;
  text-underline-offset: 3px;
}

.ad-legal {
  width: min(100%, 860px);
  padding: clamp(24px, 5vw, 52px);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgb(255 249 233 / 94%);
  box-shadow: var(--shadow-2);
}

.ad-legal h1 { font-size: clamp(2rem, 5vw, 3rem); }
.ad-legal h2 { margin-top: 2rem; font-size: clamp(1.35rem, 3vw, 1.8rem); }
.ad-legal h3 { margin-top: 1.5rem; }
.ad-legal code { overflow-wrap: anywhere; }
.ad-legal__status {
  padding: 16px;
  border-left: 5px solid var(--color-gold);
  background: #f3e6c4;
}
.ad-legal__table-wrap { overflow-x: auto; }
.ad-legal table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.ad-legal th,
.ad-legal td { padding: 10px; border: 1px solid var(--color-track); text-align: left; vertical-align: top; }
.ad-legal pre { overflow-x: auto; padding: 16px; border-radius: var(--radius-sm); background: #f1e5c6; white-space: pre-wrap; }

.ad-footer p { max-width: 52rem; }

#gc-visitors {
  position: static;
  display: inline-flex;
  min-height: 44px;
  width: fit-content;
  margin:
    0
    calc(16px + env(safe-area-inset-right, 0px))
    calc(24px + env(safe-area-inset-bottom, 0px))
    auto;
  padding: 7px 12px;
  align-items: center;
  gap: 5px;
  color: #fff;
  background: rgb(22 40 34 / 88%);
  border: 1px solid rgb(214 170 80 / 75%);
  border-radius: var(--radius-pill);
  font-size: .75rem;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  box-shadow: 0 3px 12px rgb(0 0 0 / 22%);
  backdrop-filter: blur(8px);
}

.ad-nav__more {
  min-height: 44px;
  margin: 0;
  padding: 7px 12px;
  flex: 0 0 auto;
  color: var(--color-brand);
  background: var(--color-gold);
  border-color: #f5d98e;
  border-radius: var(--radius-pill);
  box-shadow: none;
  white-space: nowrap;
}

@keyframes ad-rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (hover: hover) {
  .ad-theme-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 30px rgb(43 33 24 / 20%), 0 4px 0 rgb(43 33 24 / 14%);
  }
}

@media (min-width: 640px) {
  .ad-main {
    padding:
      34px
      calc(24px + env(safe-area-inset-right, 0px))
      calc(88px + env(safe-area-inset-bottom, 0px))
      calc(24px + env(safe-area-inset-left, 0px));
  }

  .ad-nav__core { justify-content: flex-start; }
  .ad-nav__core .ad-nav__link { flex: 0 1 auto; min-width: 94px; }

  .ad-hero__copy { padding: 28px; }
  .ad-theme-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .ad-theme-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    width: calc((100% - 16px) / 2);
    justify-self: center;
  }
  .ad-theme-card__blurb { display: block; }
  .ad-theme-card strong { font-size: 1.12rem; }

  .ad-theme-hero { grid-template-columns: minmax(180px, 34%) 1fr; padding: 24px; }
  .ad-theme-hero__image { width: 100%; }
  .ad-action-row { flex-direction: row; flex-wrap: wrap; }
  .ad-action-row .ad-button { flex: 1 1 220px; }

  .ad-case-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ad-badge-grid,
  .ad-stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ad-transfer-panel { grid-template-columns: 1fr 1fr; }
  .ad-file-input { grid-column: 1 / -1; }
  .ad-footer {
    padding-right: calc(24px + env(safe-area-inset-right, 0px));
    padding-left: calc(24px + env(safe-area-inset-left, 0px));
  }
  #gc-visitors { margin-right: calc(24px + env(safe-area-inset-right, 0px)); }
}

@media (max-width: 639px) {
  :root { --ad-header-offset: calc(220px + env(safe-area-inset-top, 0px)); }

  .ad-nav__realms {
    margin-top: 4px;
    padding-top: 3px;
    padding-bottom: 5px;
  }

  .ad-onboarding { scroll-margin-top: calc(var(--ad-header-offset) + 12px); }
}

@media (min-width: 640px) and (max-width: 1099px) {
  :root { --ad-header-offset: calc(106px + env(safe-area-inset-top, 0px)); }

  .ad-header {
    display: grid;
    grid-template-columns: minmax(150px, auto) minmax(0, 1fr);
    gap: 0 14px;
    padding:
      calc(5px + env(safe-area-inset-top, 0px))
      calc(16px + env(safe-area-inset-right, 0px))
      5px
      calc(16px + env(safe-area-inset-left, 0px));
    align-items: center;
  }

  .ad-brand {
    min-height: 44px;
    gap: 8px;
  }

  .ad-brand__seal { width: 36px; height: 36px; }
  .ad-brand__eyebrow { font-size: .64rem; }
  .ad-brand__title { font-size: 1.02rem; letter-spacing: .08em; }

  .ad-nav {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    min-width: 0;
    gap: 2px;
    margin-top: 0;
  }

  .ad-nav__group { gap: 4px; }
  .ad-nav__core { justify-content: flex-end; }
  .ad-nav__core .ad-nav__link { min-width: 76px; }

  .ad-nav > .ad-nav__group:not(.ad-nav__core):not(.ad-nav__realms) {
    justify-content: flex-end;
  }

  .ad-nav__realms {
    grid-column: 1 / -1;
    margin: 0;
    padding: 0 20px 0 0;
    background: transparent;
  }

  .ad-nav__link {
    min-height: 44px;
    padding: 6px 9px;
    font-size: .76rem;
  }

  .ad-onboarding { scroll-margin-top: calc(var(--ad-header-offset) + 12px); }
}

@media (min-width: 768px) {
  .ad-hero { min-height: clamp(470px, 63vw, 520px); }

  .ad-hero__image {
    position: absolute;
    inset: 0;
    height: 100%;
    aspect-ratio: auto;
    object-position: center;
  }

  .ad-hero__copy {
    align-self: center;
    width: min(56%, 520px);
    margin: clamp(26px, 5vw, 42px) auto clamp(26px, 5vw, 42px) clamp(24px, 4vw, 38px);
    background: rgb(255 249 233 / 90%);
  }

  .ad-hero__lead { font-size: 1.08rem; }
  .ad-hero__cta { width: auto; }
}

@media (min-width: 840px) {
  .ad-theme-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .ad-theme-card:last-child:nth-child(odd) {
    grid-column: auto;
    width: auto;
    justify-self: stretch;
  }
  .ad-badge-grid,
  .ad-stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1100px) {
  :root { --ad-header-offset: 16px; }

  body {
    display: grid;
    grid-template-columns: 252px minmax(0, 1fr);
    align-items: start;
  }

  .ad-header {
    position: sticky;
    top: 0;
    grid-column: 1;
    grid-row: 1 / 4;
    width: 252px;
    height: 100dvh;
    padding:
      calc(28px + env(safe-area-inset-top, 0px))
      18px
      calc(28px + env(safe-area-inset-bottom, 0px));
    border-right: 3px solid var(--color-gold);
    border-bottom: 0;
    overflow-y: auto;
  }

  .ad-brand { align-items: flex-start; }
  .ad-brand__seal { width: 52px; height: 52px; }
  .ad-brand__title { font-size: 1.28rem; }

  .ad-nav { margin-top: 30px; }
  .ad-nav__group { flex-direction: column; }
  .ad-nav__core .ad-nav__link { flex: none; }
  .ad-nav__realms {
    margin: 18px 0 0;
    padding: 18px 0 0;
    border-top: 1px solid rgb(214 170 80 / 35%);
    background: transparent;
    overflow: visible;
  }

  .ad-nav__link { justify-content: flex-start; padding-inline: 16px; }
  .ad-nav__link.is-active::after { right: 14px; bottom: auto; }

  .ad-main {
    grid-column: 2;
    width: min(100%, 1120px);
    padding: 48px 40px 100px;
  }

  .ad-footer {
    grid-column: 2;
    width: min(100%, 1120px);
    padding: 24px 40px 64px;
  }

  .ad-theme-grid { gap: 20px; }
  .ad-theme-card__copy { padding: 16px; }
  .ad-case-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  #gc-visitors {
    grid-column: 2;
    margin: 0 40px 32px auto;
  }
}

@media (max-width: 420px) {
  .ad-brand__eyebrow { font-size: .66rem; }
  .ad-brand__title { font-size: 1.08rem; }
  .ad-brand__seal { width: 40px; height: 40px; }
  .ad-nav__link { padding-inline: 8px; font-size: .75rem; }
  .ad-theme-card__copy { padding: 10px; }
  .ad-theme-card strong { font-size: .9rem; }
  .ad-theme-card__realm,
  .ad-theme-card__tier { font-size: .66rem; }

  .ad-game-panel,
  .ad-scenario,
  .ad-privacy-summary,
  .ad-reset-panel,
  .ad-fieldwork,
  .ad-reflection { padding-inline: 14px; }

  .ad-mode-switcher { width: 100%; }
}

@media (forced-colors: active) {
  .ad-nav__link.is-active,
  .ad-button[aria-pressed="true"],
  .ad-mode-button[aria-pressed="true"],
  .ad-option.is-correct,
  .ad-option.is-wrong,
  .ad-feedback,
  .ad-sticky-progress {
    border: 2px solid ButtonText;
    forced-color-adjust: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .ad-main > :is(
    .ad-hero,
    .ad-rank-card,
    .ad-onboarding,
    .ad-section-heading,
    .ad-theme-grid,
    .ad-theme-hero,
    .ad-case-list,
    .ad-scenario,
    .ad-clue-list,
    .ad-game-panel,
    .ad-badge-grid,
    .ad-stats-grid,
    .ad-transfer-panel,
    .ad-guide-grid,
    .ad-privacy-summary,
    .ad-reset-panel,
    .ad-fieldwork,
    .ad-reflection
  ),
  .ad-theme-card,
  .ad-button,
  .ad-mode-button,
  .ad-case-link { transform: none !important; }
}

@media print {
  .ad-header,
  .ad-footer,
  #gc-visitors,
  .ad-button,
  .ad-file-label,
  input[type="file"] { display: none !important; }

  body,
  .ad-main {
    color: #000;
    background: #fff;
  }

  .ad-main {
    width: 100%;
    max-width: none;
    padding: 0;
  }

  .ad-game-panel,
  .ad-stat-card {
    break-inside: avoid;
    box-shadow: none;
  }
}