:root {
  --bg: linear-gradient(160deg, #f4efe6 0%, #d7e6eb 45%, #f7faf1 100%);
  --panel: rgba(255, 255, 255, 0.82);
  --panel-border: rgba(28, 41, 47, 0.12);
  --ink: #162126;
  --muted: #506168;
  --accent: #0e6b63;
  --ok: #2f7d4f;
  --warn: #b37a10;
  --bad: #b1442f;
  --soft: #7f8f95;
  --shadow: 0 22px 60px rgba(22, 33, 38, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Hiragino Sans", sans-serif;
  background: var(--bg);
  min-height: 100vh;
}

button,
input,
textarea {
  font: inherit;
}

.shell {
  width: min(1080px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  padding: 8px 4px 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
button {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
}

h1 {
  margin: 0;
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 0.95;
}

.lede {
  max-width: 62ch;
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.panel {
  backdrop-filter: blur(18px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.controls {
  display: grid;
  gap: 18px;
  padding: 24px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.95rem;
  font-weight: 700;
}

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

.stage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.stage {
  display: grid;
  gap: 12px;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.stage-step {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
}

textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ② 整形結果: 文献ごとの行（番号＋ヘアライン区切り） */
.ref-editor {
  counter-reset: refnum;
  border: 1px solid rgba(22, 33, 38, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.8);
  min-height: 260px;
  max-height: 520px;
  overflow-y: auto;
}

.ref-editor.is-disabled {
  opacity: 0.6;
}

.ref-row {
  counter-increment: refnum;
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 10px;
  align-items: start;
  padding: 8px 14px;
  border-bottom: 1px solid rgba(22, 33, 38, 0.09);
}

.ref-row:last-child {
  border-bottom: 0;
}

.ref-row:focus-within {
  background: rgba(14, 107, 99, 0.07);
}

.ref-num {
  text-align: right;
  padding-top: 2px;
  color: var(--soft);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  user-select: none;
}

.ref-num::before {
  content: counter(refnum);
}

/* 行内エディタ: 枠なし・透明背景にして「行」を視覚単位にする */
.ref-input {
  width: 100%;
  min-height: 1.6em;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  resize: none;
  overflow: hidden;
  line-height: 1.6;
}

.ref-input:focus {
  outline: none;
}

.ref-empty {
  margin: 0;
  padding: 16px;
  color: var(--muted);
  line-height: 1.6;
}

.ref-hint {
  margin: 8px 2px 0;
  font-size: 0.8rem;
  color: var(--soft);
  line-height: 1.6;
}

.ref-hint kbd {
  font: inherit;
  padding: 1px 5px;
  border: 1px solid rgba(22, 33, 38, 0.2);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.7);
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(22, 33, 38, 0.18);
  border-radius: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink);
}

textarea {
  resize: vertical;
  min-height: 260px;
  line-height: 1.6;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.checkbox-row input {
  width: 18px;
  height: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 13px 20px;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

#clean,
#run {
  background: var(--ink);
  color: white;
}

#reclean,
#download {
  background: rgba(14, 107, 99, 0.14);
  color: var(--accent);
}

.status,
#summary {
  margin: 0;
  color: var(--muted);
}

.results-panel {
  margin-top: 24px;
  padding: 24px;
}

.results-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.results {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.result-card {
  border: 1px solid rgba(22, 33, 38, 0.08);
  border-left-width: 8px;
  border-radius: 18px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.74);
}

.result-card.ok { border-left-color: var(--ok); }
.result-card.partial { border-left-color: var(--soft); }
.result-card.likely-wrong { border-left-color: var(--warn); }
.result-card.not-found { border-left-color: var(--bad); }
.result-card.retracted {
  border-left-color: #8a0303;
  border-left-width: 12px;
  background: rgba(177, 68, 47, 0.08);
  box-shadow: 0 0 0 2px rgba(138, 3, 3, 0.25);
}
.result-card.website { border-left-color: var(--soft); }
.result-card.year-warning { border-left-color: var(--warn); }
.result-card.error { border-left-color: var(--bad); }

.result-card.retracted .badge {
  background: #8a0303;
  color: #fff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.result-card-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.result-title {
  margin: 0;
  font-size: 1.05rem;
}

.badge {
  flex: none;
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(22, 33, 38, 0.08);
  font-size: 0.8rem;
  font-weight: 700;
}

.result-input {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
  word-break: break-word;
}

.result-meta {
  margin: 14px 0 0;
  padding-left: 18px;
  line-height: 1.7;
}

.empty {
  margin: 0;
  color: var(--muted);
}

.notice {
  margin-top: 18px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
}

.notice h3 {
  margin: 0 0 6px;
  font-size: 0.9rem;
  color: var(--ink);
}

.notice ul {
  margin: 0 0 12px;
  padding-left: 20px;
}

.notice ul:last-child {
  margin-bottom: 0;
}

.notice a {
  color: var(--accent);
}

.site-footer {
  margin-top: 40px;
  padding: 16px 4px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 720px) {
  .shell {
    width: min(100vw - 20px, 1080px);
    padding-top: 20px;
  }

  .controls,
  .results-panel {
    padding: 18px;
    border-radius: 20px;
  }

  .stage-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    line-height: 1.05;
  }
}