@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,600;8..60,700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ink: #1B2A3F;
  --ink-soft: #33475F;
  --paper: #EDE7DA;
  --paper-raised: #F7F3E9;
  --brass: #A9813F;
  --brass-deep: #7C5E2C;
  --line: #C9BFA8;
  --text: #262320;
  --text-muted: #5B564C;
  --ok: #4B6E53;
  --warn: #9C4A3A;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(27,42,63,0.035) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(27,42,63,0.035) 40px);
}

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.masthead {
  border-bottom: 3px double var(--ink);
  padding-bottom: 18px;
  margin-bottom: 40px;
  text-align: center;
}

.masthead .eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass-deep);
  margin-bottom: 6px;
}

.masthead h1 {
  font-family: 'Source Serif 4', serif;
  font-weight: 700;
  font-size: 38px;
  margin: 0 0 8px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.masthead p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 32px;
  box-shadow: 0 1px 0 var(--line);
}

label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

textarea {
  width: 100%;
  min-height: 120px;
  padding: 14px 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 2px;
  resize: vertical;
}

textarea:focus, button:focus, .btn:focus {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

.hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 10px;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  background: var(--ink);
  color: var(--paper-raised);
  border: none;
  padding: 13px 28px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.15s ease;
}

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

.banner {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  padding: 12px 16px;
  border: 1px dashed var(--brass);
  color: var(--brass-deep);
  background: rgba(169, 129, 63, 0.08);
  margin-bottom: 28px;
  border-radius: 2px;
}

.error {
  color: var(--warn);
  font-size: 14px;
  margin-top: 14px;
}

.disclaimer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ---- Results page ---- */

.result-card {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 28px 32px;
  margin-bottom: 28px;
  overflow: hidden;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.patent-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--brass-deep);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.patent-title {
  font-family: 'Source Serif 4', serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin: 4px 0 0;
}

/* The stamp: signature element, evokes an official seal */
.stamp {
  flex-shrink: 0;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  border: 3px solid var(--brass);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transform: rotate(-8deg);
  position: relative;
}

.stamp::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--brass);
  border-radius: 50%;
}

.stamp .tier-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--brass-deep);
  line-height: 1.25;
}

.range-line {
  margin-bottom: 22px;
}

.range-line .label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.range-line .value {
  font-family: 'Source Serif 4', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
}

.bars {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.bar-row {
  display: grid;
  grid-template-columns: 150px 1fr 40px;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.bar-track {
  background: var(--paper);
  border: 1px solid var(--line);
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--ink-soft);
}

.explanation h4 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 10px;
}

.explanation ul {
  margin: 0;
  padding-left: 18px;
}

.explanation li {
  margin-bottom: 8px;
  font-size: 14.5px;
}

.data-note {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--brass-deep);
  font-style: italic;
}

.back-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--ink-soft);
}