/* CanWeKnow — 公開的知識手帳 */

:root {
  --paper: #f4ede1;
  --paper-deep: #e9dfcf;
  --card: #fffaf3;
  --ink: #1b2a4a;
  --ink-soft: #4d5b73;
  --rule: #d7c7b0;
  --margin-red: #d98980;
  --tomato: #e03a24;
  --tomato-ink: #b72c1a;
  --leaf: #2b7a4b;
  --leaf-pale: #e5f2e8;
  --warn: #7a2e22;
  --white: #fffdf8;
  --shadow: 4px 4px 0 #1b2a4a;
  --font-display: "Fraunces", "Noto Serif TC", "Source Han Serif TC", "Songti TC", Georgia, serif;
  --font-serif: "Noto Serif TC", "Source Han Serif TC", "Songti TC", "PMingLiU", Georgia, serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Hiragino Sans CNS", "Microsoft JhengHei", sans-serif;
  --measure: 40rem;
  --wrap: 70rem;
  --wrap-narrow: 44rem;
  --radius: 3px;
  --header-h: 4.25rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
}

body {
  min-height: 100dvh;
  position: relative;
}

@media (min-width: 900px) {
  body {
    background-image:
      linear-gradient(90deg, transparent 3.1rem, var(--margin-red) 3.1rem, var(--margin-red) 3.22rem, transparent 3.22rem);
    background-attachment: fixed;
  }
}

.page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
  background-image:
    radial-gradient(circle at 20% 10%, #fff 0.6px, transparent 0.8px),
    radial-gradient(circle at 80% 40%, #1b2a4a 0.4px, transparent 0.7px);
  background-size: 7px 9px, 11px 13px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3.5rem;
  z-index: 100;
  padding: 0.5rem 0.8rem;
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
}

.skip-link:focus {
  top: 0.75rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#chrome,
#main {
  position: relative;
  z-index: 1;
}

#main:focus {
  outline: none;
}

#main:focus-visible {
  outline: none;
}

:focus-visible {
  outline: 3px solid var(--tomato);
  outline-offset: 3px;
}

h1[tabindex="-1"]:focus,
h1[tabindex="-1"]:focus-visible,
h2[tabindex="-1"]:focus,
h2[tabindex="-1"]:focus-visible {
  outline: none;
}

.wrap {
  width: min(var(--wrap), calc(100% - 2rem));
  margin-inline: auto;
}

.wrap-narrow {
  width: min(var(--wrap-narrow), calc(100% - 2rem));
  margin-inline: auto;
}

.prose {
  max-width: var(--measure);
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.01em;
  text-wrap: pretty;
  overflow-wrap: break-word;
}

h1 {
  font-size: clamp(1.85rem, 4.2vw, 3.15rem);
  margin: 0 0 0.75rem;
}

h2 {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  margin: 0 0 0.6rem;
}

p {
  margin: 0 0 0.85rem;
}

a {
  color: var(--ink);
}

img,
svg {
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--paper) 92%, white);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  flex-wrap: wrap;
  padding: 0.7rem 0;
  min-height: var(--header-h);
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--ink);
}

.wordmark-mark {
  display: inline-flex;
  width: 1.35rem;
  height: 1.55rem;
  border: 1.5px solid var(--ink);
  background: var(--card);
  position: relative;
  flex: none;
  top: 0.12rem;
}

.wordmark-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 0.38rem;
  background: var(--tomato);
}

.wordmark-name {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  line-height: 1;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.7rem 1rem;
  margin-left: auto;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .header-nav {
    width: 100%;
    margin-left: 0;
    justify-content: space-between;
  }
}

.header-link {
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.28em;
  background: none;
  border: 0;
  padding: 0.35rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 48px;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 2px solid transparent;
  white-space: normal;
  text-align: center;
  max-width: 100%;
}

.btn-primary {
  background: var(--tomato);
  color: var(--white);
  border-color: var(--tomato-ink);
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--ink);
}

.btn-primary:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--ink);
}

.btn-ghost {
  background: var(--card);
  color: var(--ink);
  border-color: var(--ink);
}

.btn-ghost:hover {
  background: var(--paper-deep);
}

.btn-block {
  width: 100%;
}

.hero {
  padding: 2.2rem 0 1.4rem;
}

.kicker {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin-bottom: 0.55rem;
}

.hero h1 {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.55rem;
  display: inline-block;
  max-width: 100%;
}

.lede {
  font-size: 1.12rem;
  max-width: 34rem;
  color: var(--ink);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  margin: 1.25rem 0 1.8rem;
}

.text-link {
  background: none;
  border: 0;
  padding: 0.25rem 0;
  min-height: 44px;
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.28em;
  cursor: pointer;
}

.search-panel {
  background: var(--card);
  border: 1.5px solid var(--ink);
  box-shadow: var(--shadow);
  padding: 1rem 1rem 1.1rem;
  margin: 0 0 2rem;
}

.search-panel label {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.search-input {
  width: 100%;
  min-height: 56px;
  border: 0;
  border-bottom: 2px solid var(--ink);
  background: transparent;
  border-radius: 0;
  padding: 0.4rem 0.1rem 0.5rem;
  font-size: 1.15rem;
  appearance: none;
}

.search-input::placeholder {
  color: var(--ink-soft);
  opacity: 0.85;
}

.search-hint {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0 0 1rem;
}

.section-head h2 {
  margin: 0;
}

.count-pill {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  gap: 1.1rem;
  padding-bottom: 3rem;
}

@media (min-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  background: var(--card);
  border: 1.5px solid var(--ink);
  padding: 1.05rem 1.05rem 1.1rem 1.85rem;
  text-decoration: none;
  color: inherit;
  min-width: 0;
  box-shadow: 3px 3px 0 color-mix(in srgb, var(--ink) 18%, var(--paper));
  position: relative;
}

.card::before,
.card::after {
  content: "";
  position: absolute;
  left: 0.42rem;
  width: 0.46rem;
  height: 0.46rem;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
}

.card::before { top: 1.15rem; }
.card::after { top: 2.05rem; }

.card:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 color-mix(in srgb, var(--ink) 22%, var(--paper));
}

.card-claim {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  line-height: 1.45;
  margin: 0;
}

.card-meta {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  align-items: center;
  color: var(--ink-soft);
}

.evidence-count {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--leaf);
  font-weight: 700;
}

.evidence-count::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  background: var(--leaf);
  border-radius: 50%;
}

.card-go {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.empty-state {
  background: var(--card);
  border: 1.5px dashed var(--ink);
  padding: 1.6rem 1.2rem;
  text-align: left;
}

.empty-state h2 {
  margin-bottom: 0.4rem;
}

.know-bar {
  margin: 0.15rem 0 0;
}

.know-bar-caption {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0 0 0.35rem;
}

.know-bar-track {
  position: relative;
  height: 0.72rem;
  background: var(--paper-deep);
  border: 1.5px solid var(--ink);
  overflow: hidden;
}

.know-bar-fill {
  height: 100%;
  width: var(--fill, 30%);
  background: var(--leaf);
}

.know-bar[data-status="unverified"] .know-bar-fill {
  background: repeating-linear-gradient(
    90deg,
    var(--ink) 0 7px,
    transparent 7px 13px
  );
  opacity: 0.45;
}

.know-bar[data-status="conditional"] .know-bar-fill {
  background: var(--leaf);
}

.know-bar[data-status="disputed"] .know-bar-fill {
  background: repeating-linear-gradient(
    -45deg,
    var(--tomato) 0 6px,
    var(--ink) 6px 12px
  );
}

.stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.55rem;
  padding: 0.2rem 0.55rem 0.15rem;
  border: 2px solid currentColor;
  border-radius: 2px;
  font-weight: 700;
  transform: rotate(-1.4deg);
  width: fit-content;
  max-width: 100%;
}

.stamp-mark {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
}

.stamp-unverified { color: var(--ink); }
.stamp-conditional { color: var(--leaf); }
.stamp-disputed { color: var(--warn); }

.back-row {
  padding: 1rem 0 0.3rem;
}

.detail-hero {
  padding: 1.15rem 0 1.4rem;
}

.claim-sentence {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.4;
  margin: 0;
}

.section {
  padding: 1.25rem 0 0.4rem;
  border-top: 1px solid var(--rule);
}

.section-label {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0 0 0.45rem;
  font-family: var(--font-serif);
}

.summary-line {
  font-size: 1.05rem;
  max-width: var(--measure);
}

.meta-row {
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.3rem 0 0.6rem;
}

.tag {
  display: inline-block;
  padding: 0.28rem 0.65rem;
  border: 1.5px solid var(--ink);
  background: var(--white);
  font-size: 0.95rem;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.evidence-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 800px) {
  .evidence-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.mini-card {
  background: var(--card);
  border: 1.5px solid var(--ink);
  padding: 0.9rem 0.95rem;
  min-width: 0;
}

.mini-card h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  margin: 0 0 0.35rem;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}

.mini-card .n {
  color: var(--leaf);
  font-variant-numeric: tabular-nums;
}

.mini-card.is-counter {
  border-color: var(--warn);
}

.mini-card.is-counter .n {
  color: var(--warn);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0.2rem 0 0.6rem;
  border-left: 2px solid var(--ink);
}

.timeline li {
  padding: 0 0 1rem 1rem;
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -0.38rem;
  top: 0.35rem;
  width: 0.65rem;
  height: 0.65rem;
  background: var(--card);
  border: 2px solid var(--ink);
}

.timeline time {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
}

.page-cta {
  padding: 1.2rem 0 2.6rem;
}

@media (max-width: 700px) {
  .page-cta {
    position: sticky;
    bottom: 0;
    background: color-mix(in srgb, var(--paper) 94%, white);
    border-top: 1px solid var(--rule);
    padding: 0.8rem 0 calc(0.8rem + env(safe-area-inset-bottom));
    z-index: 15;
  }
}

.wizard-header {
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--paper) 92%, white);
  position: sticky;
  top: 0;
  z-index: 20;
}

.wizard-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem 0.85rem;
  flex-wrap: wrap;
  padding: 0.75rem 0;
  min-height: 3.6rem;
}

.progress {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.progress-dots {
  display: none;
  gap: 0.35rem;
}

@media (min-width: 640px) {
  .progress-dots {
    display: flex;
  }
}

.progress-dots span {
  width: 0.55rem;
  height: 0.55rem;
  border: 1.5px solid var(--ink);
  background: transparent;
}

.progress-dots span.is-done,
.progress-dots span.is-now {
  background: var(--ink);
}

.progress-dots span.is-now {
  background: var(--tomato);
  border-color: var(--tomato-ink);
}

.wizard {
  padding: 1.4rem 0 3rem;
}

.wizard-q {
  margin-bottom: 1.1rem;
}

.example {
  background: var(--leaf-pale);
  border-left: 4px solid var(--leaf);
  padding: 0.8rem 0.9rem;
  margin: 0 0 1rem;
}

.example p {
  margin: 0 0 0.5rem;
}

.choices {
  display: grid;
  gap: 0.7rem;
  margin: 0 0 1.1rem;
}

.choice {
  display: block;
  cursor: pointer;
  position: relative;
}

.choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
}

.choice-card {
  display: block;
  background: var(--card);
  border: 1.5px solid var(--ink);
  padding: 0.95rem 1rem;
}

.choice-card strong {
  display: block;
  font-size: 1.08rem;
  margin-bottom: 0.2rem;
}

.choice-card span {
  color: var(--ink-soft);
}

.choice input:focus-visible + .choice-card {
  outline: 3px solid var(--tomato);
  outline-offset: 3px;
}

.choice input:checked + .choice-card {
  border-width: 2.5px;
  box-shadow: 3px 3px 0 var(--ink);
  background:
    linear-gradient(135deg, var(--tomato) 0 1.15rem, transparent 1.15rem),
    var(--card);
}

.choice input:checked + .choice-card::before {
  content: none;
}

.field-label {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.textarea {
  width: 100%;
  min-height: 10.5rem;
  padding: 0.8rem 0.85rem;
  border: 1.5px solid var(--ink);
  background: var(--card);
  resize: vertical;
  overflow-wrap: anywhere;
}

.dropzone {
  width: 100%;
  min-height: 10.5rem;
  padding: 1.1rem;
  border: 2px dashed var(--ink);
  background:
    repeating-linear-gradient(
      var(--card),
      var(--card) 1.7rem,
      color-mix(in srgb, var(--rule) 70%, white) 1.75rem
    );
  text-align: left;
}

.dropzone.is-filled {
  border-style: solid;
  border-color: var(--leaf);
}

.file-name {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--leaf);
  overflow-wrap: anywhere;
}

.wizard-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.2rem;
}

.field-error {
  color: var(--warn);
  font-weight: 700;
  margin: 0.4rem 0 0;
}

.summary-list {
  background: var(--card);
  border: 1.5px solid var(--ink);
  padding: 0.3rem 1rem 0.6rem;
  margin: 0 0 1rem;
}

.summary-list dt {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-top: 0.85rem;
  font-family: var(--font-serif);
}

.summary-list dd {
  margin: 0.2rem 0 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.success {
  padding: 2.2rem 0 3rem;
}

.success-seal {
  display: inline-block;
  border: 3px solid var(--leaf);
  color: var(--leaf);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-size: 1.15rem;
  padding: 0.35rem 0.7rem;
  transform: rotate(-6deg);
  margin-bottom: 1rem;
}

.success h1 {
  max-width: 18em;
}

.site-footer {
  border-top: 1px solid var(--rule);
  padding: 1rem 0 1.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.not-found {
  padding: 2.5rem 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .btn-primary:hover,
  .card:hover {
    transform: none;
  }
}