:root {
  --bg: #f5efe4;
  --bg-accent: #ead8bc;
  --surface: rgba(255, 252, 246, 0.9);
  --surface-strong: #fffdf7;
  --text: #1f1e1a;
  --muted: #615b4f;
  --line: rgba(56, 44, 25, 0.16);
  --accent: #0f766e;
  --accent-strong: #115e59;
  --shadow: 0 24px 80px rgba(54, 42, 21, 0.14);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(176, 88, 58, 0.16), transparent 24%),
    linear-gradient(145deg, var(--bg), #f8f4eb 42%, var(--bg-accent));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(31, 30, 26, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 30, 26, 0.025) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 90%);
}

.page-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 56px;
  display: grid;
  gap: 24px;
}

.hero-card,
.result-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  padding: 36px;
}

.hero-card::after,
.result-card::after {
  content: "";
  position: absolute;
  inset: auto -120px -120px auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 118, 110, 0.12), transparent 68%);
}

.eyebrow,
.result-title {
  margin: 0 0 10px;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-strong);
  font-weight: 600;
}

h1 {
  margin: 0;
  max-width: 12ch;
  font-family: "Fraunces", serif;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  line-height: 0.95;
}

.lede,
.result-subtitle,
.status-message {
  color: var(--muted);
}

.lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 1.05rem;
  line-height: 1.7;
}

.lookup-form {
  margin-top: 28px;
}

.field-label,
.meta-label {
  display: block;
  margin-bottom: 10px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  min-width: 0;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(56, 44, 25, 0.14);
  background: var(--surface-strong);
  color: var(--text);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

textarea {
  resize: vertical;
  min-height: 160px;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: rgba(17, 94, 89, 0.54);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.16);
}

.input-hint {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.actions-row {
  display: flex;
  justify-content: flex-start;
  margin-top: 14px;
}

button {
  border: 0;
  border-radius: 18px;
  padding: 16px 22px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, background-color 160ms ease;
}

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

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

#submit-button {
  color: #f5fcfb;
  background: linear-gradient(135deg, var(--accent), #1d8d84);
}

.secondary-button {
  color: var(--accent-strong);
  background: rgba(15, 118, 110, 0.1);
}

.meta-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.meta-strip > div {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 253, 247, 0.7);
  border: 1px solid rgba(56, 44, 25, 0.1);
}

code,
.result-output {
  font-family: "IBM Plex Sans", sans-serif;
}

#normalized-doi {
  display: block;
  max-height: 5.5em;
  overflow: auto;
  color: var(--text);
  font-weight: 600;
}

.status-message {
  margin: 18px 0 0;
  min-height: 1.5em;
}

.result-card {
  padding: 28px;
}

.result-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.result-subtitle {
  margin: 0;
}

.result-output {
  margin: 18px 0 0;
  padding: 22px;
  min-height: 340px;
  overflow: auto;
  border-radius: 22px;
  background: #1e1f1d;
  color: #f7f4eb;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

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

  .hero-card,
  .result-card {
    border-radius: 22px;
  }

  .hero-card,
  .result-card {
    padding: 20px;
  }

  .meta-strip,
  .result-header {
    grid-template-columns: 1fr;
    display: grid;
  }

  .result-header {
    justify-content: stretch;
  }

  #submit-button,
  .secondary-button {
    width: 100%;
  }

  h1 {
    max-width: 100%;
  }
}