:root {
  color-scheme: light;
  --bg: #f7f7f5;
  --panel: #ffffff;
  --border: #e0dfd9;
  --border-strong: #d4d4d0;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --muted-soft: #9b9b93;
  --success: #1a7f4b;
  --danger: #b84040;
}

* {
  box-sizing: border-box;
}

/* body {
  margin: 0;
  min-height: 100vh;
  background: #ffffff;
  color: var(--text);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
} */
body {
  margin: 0;
  min-height: 100vh;
  background: #f6f3ee;
  color: var(--text);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}



.page {
  width: 100%;
  max-width: 1700px;
  margin: 0 auto;
  padding: 28px 48px 36px;
}

.header-bar {
  width: 100%;
  padding: 10px 30px;
  background:
    linear-gradient(180deg, rgba(255, 253, 250, 0.644) 0%, rgba(246, 243, 238, 0.72) 100%),
    linear-gradient(90deg, #c5c1ba 0%, #cfc4b1 52%, #dfe8e2 100%);
  border-bottom: 1px solid rgba(76, 76, 74, 0.202);
  box-shadow: 0 14px 28px rgba(149, 149, 149, 0.08);
}

.header-inner {
  width: 100%;
  max-width: 1540px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  gap: 18px;
}

.app-shell {
  width: 100%;
  max-width: 1540px;
  margin: 0 auto;
  min-height: auto;
  display: grid;
  grid-template-columns: minmax(960px, 1fr) 420px;
  gap: 44px;
  align-items: start;
}

.main-pane,
.side-pane {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.side-pane {
  padding-top: 0;
  min-height: 100%;
  justify-content: center;
}


.title {
  margin: 0;
  font-size: 39px;
  font-weight: 500;
  font-family: serif, Georgia, "Times New Roman", Times;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.subtitle {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  color: var(--muted);
}

.card {
  background: color-mix(in srgb, var(--panel) 88%, #faf6ef 12%);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 28px 24px;
  box-shadow: 0 18px 48px rgba(48, 42, 31, 0.06);
}
#result-card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 8px 0 0;
}


.bottom-panel {
  width: 100%;
  max-width: 1540px;
  margin: 28px auto 0;
}

.workspace-card {
  padding: 0 0 18px;
  background: transparent;
  border: none;
  box-shadow: none;
}

.section-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.card-note {
  margin: -2px 0 10px;
  font-size: 14px;
  color: var(--muted-soft);
}

.stack {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  margin-bottom: 18px;
}

.input-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
}


textarea {
  width: 100%;
  min-height: 450px;
  padding: 16px 18px;
  font-size: 16px;
  line-height: 1.55;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  resize: vertical;
  background: rgba(255, 255, 255, 0.82);
  color: var(--text);
  outline: none;
  transition: border-color 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}


textarea:focus {
  border-color: #a48b68;
  background: #fffdfa;
  box-shadow: 0 0 0 4px rgba(164, 139, 104, 0.12);
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-width: 146px;
  padding: 14px 22px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.04em;
  background: var(--text);
  color: #ffffff;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(26, 26, 26, 0.18);
  transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}
button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(26, 26, 26, 0.2);
}
button:disabled {
  background: var(--muted-soft);
  cursor: not-allowed;
  box-shadow: none;
}

.error-msg {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--danger);
}



/* hide component */
.hidden {
  display: none;
}


.result-visual {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 4px 0 0;
}

.result-meter {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.probability-ring {
  --ring-angle: 0deg;
  --ring-color: hsl(8 72% 46%);
  width: 138px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    conic-gradient(var(--ring-color) 0 var(--ring-angle), #e8e8e4a4 var(--ring-angle) 360deg);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.probability-ring-inner {
  width: calc(100% - 16px);
  height: calc(100% - 16px);
  border-radius: 50%;
  background: #f6f3ee;
  color: var(--text);
  display: grid;
  place-items: center;
}

.probability-value {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.result-copy {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}
.result-eyebrow {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.result-description {
  margin: 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--muted);
}



.classification {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}
.classification-decision {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
}
/* green for same author */
.classification-decision.is-same {
  color: var(--success);
}
/* red for different author */
.classification-decision.is-different {
  color: var(--danger);
}



.sidebar-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(210px, 250px));
  justify-content: start;
  gap: 10px;
}


.performance-card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.metric-main {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.metric-summary {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.meta-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-right: 0;
}
.meta-value {
  font-size: 22px;
  letter-spacing: -0.2px;
}

.meta-label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.03em;
}
.metric-rating {
  font-size: 13px;
  font-weight: 600;
  color: #8b7355;
  letter-spacing: 0.02em;
}

.metric-note {
  margin: 0;
  font-size: 11px;
  line-height: 1.45;
  color: var(--muted-soft);
}



@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .side-pane {
    padding-top: 0;
  }
  .bottom-panel {
    margin-top: 20px;
  }
  .result-visual {
    align-items: flex-start;
  }

  .stack {
    grid-template-columns: 1fr;
  }
  .sidebar-stats {
    grid-template-columns: 1fr;
    gap: 14px;
    justify-content: stretch;
  }
  .metric-main {
    gap: 6px;
  }
}

@media (max-width: 720px) {
  .page {
    padding: 20px 16px 28px;
  }
  .card {
    padding: 20px 18px;
  }
  .header-bar {
    padding: 12px 30px;
  }
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 3px;
  }
  .title {
    font-size: 26px;
    white-space: normal;
  }
  textarea {
    min-height: 220px;
  }
  .result-visual {
    flex-direction: column;
    gap: 16px;
  }
  .probability-ring {
    width: 120px;
  }
  .probability-value {
    font-size: 26px;
  }

  .metric-main {
    gap: 6px;
  }}