/* EuroNautica Maritime Surveying: Admiralty chart sheet */
:root {
  --ern-paper: #F7F5EE;
  --ern-paper-deep: #EFEBDF;
  --ern-admiralty: #0C1E35;
  --ern-admiralty-soft: #2A3C55;
  --ern-rhumb: #9D174D;
  --ern-rhumb-wash: rgba(157, 23, 77, 0.08);
  --ern-brass: #B45309;
  --ern-brass-wash: rgba(180, 83, 9, 0.12);
  --ern-grid: #DDD6C7;
  --ern-shoal: #D6E4EC;
  --ern-ink-muted: #4C5A6B;
  --ern-cinzel: 'Cinzel', 'Trajan Pro', Georgia, serif;
  --ern-mulish: 'Mulish', 'Segoe UI', system-ui, sans-serif;
  --ern-b612: 'B612 Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --ern-measure: 72ch;
  --ern-sheet: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.ern-chart-paper {
  margin: 0;
  background-color: var(--ern-paper);
  background-image:
    linear-gradient(var(--ern-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--ern-grid) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  color: var(--ern-admiralty);
  font-family: var(--ern-mulish);
  font-size: 1.0625rem;
  line-height: 1.65;
}
a { color: var(--ern-rhumb); text-underline-offset: 3px; }
a:hover { color: var(--ern-admiralty); }
:focus-visible { outline: 3px solid var(--ern-brass); outline-offset: 2px; }
.ern-mono { font-family: var(--ern-b612); font-size: 0.92em; letter-spacing: 0.01em; }
.ern-skip { position: absolute; left: -999px; top: 0; background: var(--ern-admiralty); color: var(--ern-paper); padding: 0.6rem 1rem; z-index: 10; }
.ern-skip:focus { left: 1rem; }

/* Position strip and bridge bar */
.ern-position-strip { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1rem; padding: 0.35rem 1rem; background: var(--ern-paper-deep); border-bottom: 1px solid var(--ern-grid); color: var(--ern-ink-muted); font-size: 0.8rem; letter-spacing: 0.04em; }
.ern-strip-sep { color: var(--ern-rhumb); }
.ern-bridge-bar { background: var(--ern-admiralty); color: var(--ern-paper); border-bottom: 4px solid var(--ern-brass); }
.ern-bridge-inner { max-width: var(--ern-sheet); margin: 0 auto; padding: 0.9rem 1.25rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.ern-crest { display: flex; align-items: center; gap: 0.75rem; color: var(--ern-paper); text-decoration: none; }
.ern-rose { width: 46px; height: 46px; flex: none; }
.ern-rose-ring { fill: none; stroke: var(--ern-paper); stroke-width: 1.6; }
.ern-rose-ring-in { stroke: var(--ern-brass); stroke-dasharray: 2 3; }
.ern-rose-n { fill: var(--ern-rhumb); }
.ern-rose-s { fill: var(--ern-paper); }
.ern-rose-ew { fill: #8A9AB0; }
.ern-rose-hub { fill: var(--ern-brass); }
.ern-crest-words { display: flex; flex-direction: column; line-height: 1.15; }
.ern-crest-name { font-family: var(--ern-cinzel); font-weight: 700; font-size: 1.45rem; letter-spacing: 0.08em; }
.ern-crest-sub { font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: #C9D2DE; }
.ern-helm-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.ern-helm-link { color: var(--ern-paper); text-decoration: none; font-weight: 500; font-size: 0.95rem; padding: 0.3rem 0; border-bottom: 2px solid transparent; }
.ern-helm-link:hover, .ern-helm-link[aria-current="page"] { color: var(--ern-paper); border-bottom-color: var(--ern-brass); }

/* Chartroom and dossiers */
.ern-chartroom { max-width: var(--ern-sheet); margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.ern-survey-dossier { position: relative; background: var(--ern-paper); border: 1px solid var(--ern-admiralty); outline: 1px solid var(--ern-admiralty); outline-offset: 4px; margin: 1.75rem 0 2.5rem; padding: 2rem clamp(1.1rem, 3.5vw, 2.75rem); box-shadow: 0 1px 0 var(--ern-grid); }
.ern-dossier-reading { max-width: 860px; margin-left: auto; margin-right: auto; }
.ern-folio { margin: 0 0 0.5rem; color: var(--ern-rhumb); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }
.ern-dossier-title { font-family: var(--ern-cinzel); font-weight: 700; font-size: clamp(1.75rem, 4vw, 2.65rem); line-height: 1.15; letter-spacing: 0.02em; margin: 0 0 0.9rem; }
.ern-lede { font-size: 1.16rem; color: var(--ern-admiralty-soft); max-width: var(--ern-measure); margin: 0 0 1rem; }
.ern-byline { font-size: 0.9rem; color: var(--ern-ink-muted); border-top: 1px solid var(--ern-grid); padding-top: 0.7rem; margin: 1rem 0 0; }
.ern-dossier-head { border-bottom: 3px double var(--ern-admiralty); padding-bottom: 1.2rem; margin-bottom: 1.5rem; }
.ern-section-head { margin-bottom: 1.4rem; }
.ern-section-lede { max-width: var(--ern-measure); color: var(--ern-admiralty-soft); margin: 0; }
.ern-compass-head { font-family: var(--ern-cinzel); font-weight: 600; font-size: clamp(1.3rem, 2.6vw, 1.7rem); line-height: 1.25; margin: 2rem 0 0.75rem; display: flex; align-items: baseline; gap: 0.6rem; }
.ern-section-head .ern-compass-head { margin-top: 0; }
.ern-compass-head::before { content: ''; flex: none; width: 0.75rem; height: 0.75rem; transform: rotate(45deg) translateY(-0.1rem); border: 2px solid var(--ern-rhumb); background: linear-gradient(135deg, var(--ern-rhumb) 50%, transparent 50%); }
.ern-prose { max-width: var(--ern-measure); }
.ern-prose p { margin: 0 0 1rem; }
.ern-list { padding-left: 1.2rem; margin: 0 0 1.2rem; }
.ern-list li { margin-bottom: 0.45rem; }
.ern-list li::marker { color: var(--ern-brass); }
.ern-course-line { font-size: 0.88rem; color: var(--ern-ink-muted); margin: 0.25rem 0 0; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.ern-course-sep { color: var(--ern-rhumb); }
.ern-revised { color: var(--ern-ink-muted); margin-top: 2rem; }

/* Title cartouche */
.ern-chart-title { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 2rem; align-items: start; }
.ern-title-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; margin: 1.4rem 0 0; }
.ern-ink-link { color: var(--ern-admiralty); font-weight: 700; }

/* Vessel particulars */
.ern-vessel-particulars { margin: 0 0 1.5rem; border-top: 3px solid var(--ern-brass); background: var(--ern-paper-deep); }
.ern-particular { display: grid; grid-template-columns: minmax(8rem, 38%) 1fr; gap: 0.75rem; padding: 0.55rem 0.9rem; border-bottom: 1px solid var(--ern-grid); }
.ern-particular dt { font-weight: 700; font-size: 0.86rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ern-admiralty-soft); }
.ern-particular dd { margin: 0; }
.ern-particular-key { background: var(--ern-rhumb-wash); }
.ern-particular-key dd { color: var(--ern-rhumb); font-weight: 700; font-size: 1.15rem; }

/* Sounding schedule */
.ern-table-wrap { overflow-x: auto; margin: 1.25rem 0 1.5rem; }
.ern-sounding-schedule { width: 100%; border-collapse: collapse; font-size: 0.94rem; background: var(--ern-paper); }
.ern-sounding-schedule caption { caption-side: top; text-align: left; font-family: var(--ern-b612); font-size: 0.8rem; color: var(--ern-rhumb); padding-bottom: 0.5rem; letter-spacing: 0.03em; }
.ern-sounding-schedule th, .ern-sounding-schedule td { text-align: left; padding: 0.5rem 0.7rem; border-bottom: 1px solid var(--ern-grid); vertical-align: top; }
.ern-sounding-schedule thead th { border-top: 3px solid var(--ern-brass); border-bottom: 2px solid var(--ern-admiralty); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; }
.ern-sounding-schedule tbody th { font-weight: 700; }
.ern-sounding-schedule tbody tr:nth-child(even) { background: rgba(221, 214, 199, 0.3); }

/* Margin notes and return bearings */
.ern-margin-note { border-left: 4px solid var(--ern-brass); background: var(--ern-brass-wash); padding: 0.9rem 1.2rem; margin: 1.5rem 0; max-width: var(--ern-measure); }
.ern-margin-note p { margin: 0; }
.ern-margin-kicker { color: var(--ern-brass); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.35rem !important; }
.ern-return-bearing { border: 2px solid var(--ern-admiralty); background: linear-gradient(90deg, var(--ern-admiralty) 0 8px, var(--ern-paper-deep) 8px); padding: 1.2rem 1.4rem 1.2rem 1.9rem; margin: 1.5rem 0 2rem; }
.ern-return-bearing p { margin: 0 0 0.6rem; max-width: var(--ern-measure); }
.ern-return-kicker { color: var(--ern-rhumb); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em; }
.ern-return-heading { font-family: var(--ern-cinzel); font-weight: 700; font-size: 1.3rem; }
.ern-brass-button { display: inline-block; background: var(--ern-admiralty); color: var(--ern-paper); border: 0; border-bottom: 3px solid var(--ern-brass); padding: 0.7rem 1.3rem; font: 700 0.98rem var(--ern-mulish); letter-spacing: 0.02em; text-decoration: none; cursor: pointer; }
.ern-brass-button:hover { background: var(--ern-rhumb); color: var(--ern-paper); }

/* Figures */
.ern-figure { margin: 0; }
.ern-lines-svg, .ern-osm-svg { width: 100%; height: auto; display: block; background: var(--ern-paper-deep); border: 1px solid var(--ern-grid); }
.ern-figcaption { font-size: 0.9rem; color: var(--ern-ink-muted); margin-top: 0.7rem; max-width: var(--ern-measure); }
.ern-lp-grid line { stroke: var(--ern-grid); stroke-width: 1; }
.ern-lp-centre { stroke: var(--ern-admiralty-soft) !important; stroke-dasharray: 8 4 2 4; }
.ern-lp-label, .ern-lp-caption, .ern-lp-tag, .ern-osm-key text, .ern-dl-gauge text { font-family: var(--ern-b612); font-size: 11px; fill: var(--ern-ink-muted); }
.ern-lp-caption { fill: var(--ern-rhumb); letter-spacing: 0.08em; }
.ern-lp-tag { fill: var(--ern-rhumb); }
.ern-lp-hull { fill: rgba(214, 228, 236, 0.55); stroke: var(--ern-admiralty); stroke-width: 2; }
.ern-lp-sheer { fill: none; stroke: var(--ern-admiralty); stroke-width: 3; }
.ern-lp-lwl { stroke: var(--ern-rhumb); stroke-width: 2.4; }
.ern-lp-keel, .ern-lp-rudder { fill: var(--ern-admiralty-soft); stroke: var(--ern-admiralty); stroke-width: 1.5; }
.ern-lp-shaft { stroke: var(--ern-admiralty); stroke-width: 2; }
.ern-lp-buttock, .ern-lp-water { fill: none; stroke: var(--ern-admiralty-soft); stroke-width: 1; stroke-dasharray: 5 4; }
.ern-lp-water-low { stroke-dasharray: 2 4; }
.ern-lp-sounding { fill: var(--ern-paper); stroke: var(--ern-brass); stroke-width: 2.5; }
.ern-osm-cell text { font-family: var(--ern-b612); font-size: 11px; fill: var(--ern-admiralty); }
.ern-osm-dry rect, rect.ern-osm-dry { fill: #E7EEF2; stroke: var(--ern-grid); }
.ern-osm-fair rect, rect.ern-osm-fair { fill: #C9DAE4; stroke: var(--ern-grid); }
.ern-osm-damp rect, rect.ern-osm-damp { fill: #F0C9A0; stroke: var(--ern-brass); }
.ern-osm-wet rect, rect.ern-osm-wet { fill: var(--ern-rhumb); stroke: var(--ern-admiralty); }
.ern-osm-wet text { fill: var(--ern-paper); font-weight: 700; }
.ern-osm-keel { stroke: var(--ern-admiralty); stroke-width: 2; stroke-dasharray: 10 5; }

/* Passage calculator */
.ern-passage-calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.5rem 2.25rem; }
.ern-passage-calc > .ern-section-head { grid-column: 1 / -1; margin-bottom: 0; }
.ern-calc-form { display: grid; gap: 1rem; align-content: start; }
.ern-calc-set { border: 1px solid var(--ern-grid); border-top: 3px solid var(--ern-admiralty); margin: 0; padding: 0.8rem 1rem 1rem; display: grid; gap: 0.7rem; background: var(--ern-paper-deep); }
.ern-calc-legend { font-family: var(--ern-cinzel); font-weight: 700; padding: 0 0.4rem; letter-spacing: 0.05em; }
.ern-field { display: grid; gap: 0.25rem; }
.ern-field-label { font-size: 0.9rem; font-weight: 700; }
.ern-field-hint { font-weight: 400; color: var(--ern-ink-muted); font-size: 0.8rem; }
.ern-input, .ern-select { width: 100%; font: 500 1rem var(--ern-b612); color: var(--ern-admiralty); background: var(--ern-paper); border: 1px solid var(--ern-admiralty-soft); border-radius: 0; padding: 0.5rem 0.6rem; }
.ern-select { font-family: var(--ern-mulish); }
.ern-pair { display: grid; grid-template-columns: 1fr 7.5rem; gap: 0.5rem; }
.ern-calc-actions { margin: 0; }
.ern-calc-results { align-self: start; position: sticky; top: 1rem; }
.ern-calc-readout { margin-bottom: 1rem; }
.ern-dl-scale { margin: 0 0 1rem; }
.ern-dl-caption { margin: 0 0 0.3rem; font-size: 0.92rem; }
.ern-dl-gauge { width: 100%; max-width: 420px; height: auto; display: block; }
.ern-dl-band { stroke: var(--ern-paper); stroke-width: 2; }
.ern-dl-b1 { fill: #E7EEF2; } .ern-dl-b2 { fill: #C9DAE4; } .ern-dl-b3 { fill: #8FAFC4; } .ern-dl-b4 { fill: #4F7292; } .ern-dl-b5 { fill: var(--ern-admiralty); }
.ern-dl-pointer { fill: var(--ern-rhumb); transition: transform 0.35s ease; }
.ern-calc-verdict { border-left: 4px solid var(--ern-rhumb); background: var(--ern-rhumb-wash); padding: 0.7rem 1rem; margin: 0 0 1rem; font-size: 0.96rem; }
.ern-calc-verdict:empty { display: none; }
.ern-watch-table td, .ern-watch-table th { font-family: var(--ern-b612); font-size: 0.85rem; }
.ern-watch-low td { color: var(--ern-rhumb); font-weight: 700; }
.ern-calc-small { font-size: 0.82rem; color: var(--ern-ink-muted); }

/* Checklist and library */
.ern-checklist { list-style: none; margin: 0 0 1.5rem; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.25rem 2rem; }
.ern-check-item { display: grid; grid-template-columns: 2.6rem 1fr; gap: 0.5rem; padding: 0.8rem 0; border-bottom: 1px solid var(--ern-grid); }
.ern-check-item p { margin: 0; }
.ern-check-no { color: var(--ern-rhumb); font-size: 1rem; padding-top: 0.15rem; }
.ern-check-head { font-weight: 700; margin-bottom: 0.2rem !important; }
.ern-captain-notes { background: linear-gradient(180deg, var(--ern-paper) 0, var(--ern-paper-deep) 100%); }
.ern-library { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.ern-library-link { display: flex; flex-direction: column; gap: 0.4rem; height: 100%; padding: 1rem 1.1rem; border: 1px solid var(--ern-admiralty); border-top: 4px solid var(--ern-rhumb); background: var(--ern-paper-deep); color: var(--ern-admiralty); text-decoration: none; }
.ern-library-link:hover { background: var(--ern-paper); border-top-color: var(--ern-brass); }
.ern-library-title { font-family: var(--ern-cinzel); font-weight: 700; font-size: 1.08rem; line-height: 1.3; }
.ern-library-text { font-size: 0.94rem; color: var(--ern-admiralty-soft); }

/* Colophon */
.ern-colophon { background: var(--ern-admiralty); color: #D6DEE8; border-top: 4px solid var(--ern-brass); margin-top: 2rem; }
.ern-colophon a { color: var(--ern-paper); }
.ern-colophon a:hover { color: #F0C9A0; }
.ern-colophon-inner { max-width: var(--ern-sheet); margin: 0 auto; padding: 2.25rem 1.25rem 1rem; display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 1.5rem 2rem; font-size: 0.92rem; }
.ern-colophon-name { font-family: var(--ern-cinzel); font-weight: 700; font-size: 1.1rem; color: var(--ern-paper); margin-top: 0; }
.ern-colophon-head { font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.78rem; color: #F0C9A0; margin-top: 0; }
.ern-colophon-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.4rem; }
.ern-colophon-foot { max-width: var(--ern-sheet); margin: 0 auto; padding: 1rem 1.25rem 1.75rem; border-top: 1px solid var(--ern-admiralty-soft); font-size: 0.78rem; color: #A9B6C6; }

@media (max-width: 900px) {
  .ern-chart-title, .ern-passage-calc { grid-template-columns: 1fr; }
  .ern-calc-results { position: static; }
  .ern-colophon-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .ern-checklist, .ern-library, .ern-colophon-inner { grid-template-columns: 1fr; }
  .ern-particular { grid-template-columns: 1fr; gap: 0.1rem; }
  .ern-bridge-inner { justify-content: center; }
  .ern-survey-dossier { outline-offset: 2px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ern-dl-pointer { transition: none; }
}
@media print {
  body.ern-chart-paper { background: #fff; }
  .ern-bridge-bar, .ern-position-strip, .ern-colophon, .ern-calc-form { display: none; }
  .ern-survey-dossier { outline: none; box-shadow: none; }
}