/*
 * Aesthetic: "modern nautical chart" — light, high-contrast, sunlight-legible.
 * This is an OFFLINE tool used on a boat — NO web fonts or CDN assets.
 * Visual interest comes from colour, paper-on-water depth, instrument-style
 * tabular/mono numerals, and motion only. Fonts are system stacks.
 *
 * Type scale is sized for glance-and-go use on deck (base 16px, no reading
 * text below ~13px, mono readouts are the most legible thing on screen).
 *
 * The whole palette lives in :root — swap these to re-theme. A dark
 * "deep-water" variant (bg #0a141c / panel #14222e / accent #4cc1f0 /
 * ink #eaf1f6 / warn #f3c969 / good #5fd99a / bad #f0857f) is available
 * on request.
 */

/* ---------- self-hosted fonts (Source superfamily, latin subset) ----------
   Bundled in webapp/public/fonts/ so the chosen fonts render identically with
   no network dependency (works fully offline). */
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal; font-weight: 400; font-display: swap;
  src: url(fonts/source-sans-3-400.woff2) format('woff2');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal; font-weight: 500; font-display: swap;
  src: url(fonts/source-sans-3-500.woff2) format('woff2');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal; font-weight: 600; font-display: swap;
  src: url(fonts/source-sans-3-600.woff2) format('woff2');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal; font-weight: 700; font-display: swap;
  src: url(fonts/source-sans-3-700.woff2) format('woff2');
}
@font-face {
  font-family: 'Source Code Pro';
  font-style: normal; font-weight: 400; font-display: swap;
  src: url(fonts/source-code-pro-400.woff2) format('woff2');
}
@font-face {
  font-family: 'Source Code Pro';
  font-style: normal; font-weight: 500; font-display: swap;
  src: url(fonts/source-code-pro-500.woff2) format('woff2');
}

:root {
  /* ---- nautical chart (light) ---- */
  --bg: #e9f0f4;            /* pale chart water */
  --bg-deep: #dde8ee;       /* gradient floor */
  --panel: #ffffff;         /* chart paper */
  --field: #f1f6f9;         /* recessed inputs */
  --panel-edge: rgba(20, 60, 90, 0.015);
  --zebra: rgba(18, 70, 100, 0.035);

  --ink: #15293a;           /* deep soundings navy */
  --muted: #455765;         /* slate label text (AA on white) */
  --faint: #5f7480;         /* AA-safe slate for fine print + separators */

  /* primary — petrol / ocean blue-teal (hue ~199): UI, links, icons */
  --accent: #0d5a7a;
  --accent-strong: #093f57; /* darker primary (hover/rules) */
  --accent-dim: rgba(13, 90, 122, 0.12);
  --glow: rgba(13, 90, 122, 0.28);
  --on-accent: #ffffff;     /* text on accent fills */

  /* secondary — chart cerise/magenta (hue ~330), split-complementary to the
     primary; used only in small doses (brand blip, pinned-wreck state) */
  --secondary: #c03071;
  --secondary-strong: #9c2659;
  --secondary-dim: rgba(192, 48, 113, 0.14);
  --mark: var(--secondary); /* brand blip = secondary */

  /* semantic triad — conventional ok/caution/error, tuned to a tonal family
     and AA on white; harmonised with the brand wheel:
     warn ≈ complement of primary, good analogous to primary, bad analogous
     to secondary */
  --good: #1f7a4d;          /* safe green   (hue ~150, 4.8:1) */
  --warn: #bd6a0a;          /* caution orange (hue ~32, 4.6:1) */
  --bad: #c0392b;           /* hazard red   (hue ~7, 5.0:1) */

  --border: #c7d4dc;        /* light hairline */
  --tag-bg: rgba(20, 45, 60, 0.06);

  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 40, 60, 0.05), 0 10px 26px -18px rgba(16, 40, 60, 0.22);
  --shadow-strong: 0 14px 30px -16px rgba(16, 40, 60, 0.30);

  --bg-grad:
    radial-gradient(1100px 560px at 80% -15%, rgba(13, 90, 122, 0.07), transparent 60%),
    linear-gradient(180deg, #f1f6f9 0%, var(--bg) 46%, var(--bg-deep) 100%);
  --header-grad: linear-gradient(180deg, rgba(244, 249, 251, 0.96), rgba(237, 244, 247, 0.80));

  /* web fonts (Source superfamily) with system-stack fallbacks for offline */
  --sans: "Source Sans 3", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "Source Code Pro", ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  min-height: 100vh;
  font: 16px/1.55 var(--sans);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); text-decoration: underline; }

/* ---------- header / nav ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 13px 22px 0;
  background: var(--header-grad);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
header .brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  letter-spacing: 0.03em;
  font-size: 18px;
}
header .brand::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mark);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mark) 16%, transparent);
  flex: none;
}
header .brand .sub {
  color: var(--muted);
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0;
}

nav {
  margin-top: 10px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
nav a {
  position: relative;
  font-size: 15px;
  color: var(--muted);
  padding: 9px 13px;
  border-radius: 7px 7px 0 0;
}
nav a:hover { color: var(--ink); text-decoration: none; background: var(--accent-dim); }
nav a.active { color: var(--accent); font-weight: 600; }
nav a.active::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px; bottom: -1px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px 2px 0 0;
}

main {
  padding: 26px 22px 8px;
  max-width: 1120px;
  margin: 0 auto;
}

h1 {
  font-size: 27px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
h2 {
  font-size: 13px;
  margin: 18px 0 10px;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- panels ---------- */
.panel {
  position: relative;
  background: linear-gradient(180deg, var(--panel-edge), transparent 60%), var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

/* ---------- forms ---------- */
.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 13px;
  align-items: end;
}
label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.01em;
}
label.checkbox-label { flex-direction: row; align-items: center; gap: 8px; }
label.checkbox-label input { width: auto; }

input[type="number"], input[type="date"], input[type="text"], select {
  background: var(--field);
  border: 1px solid var(--border);
  color: var(--ink);
  padding: 9px 11px;
  border-radius: 7px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
input[type="checkbox"] { accent-color: var(--accent); width: 17px; height: 17px; }

button {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: var(--on-accent);
  border: none;
  padding: 10px 18px;
  border-radius: 7px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  box-shadow: 0 2px 12px -3px var(--glow);
  transition: filter 0.15s, box-shadow 0.15s, transform 0.07s;
}
button:hover { filter: brightness(1.06); box-shadow: 0 4px 18px -3px var(--glow); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }

/* keyboard focus rings for interactive elements (inputs handled above) */
button:focus-visible,
nav a:focus-visible,
.card:focus-visible,
details.advanced > summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* search/lookup buttons sitting in a .controls grid cell: natural width */
.controls label button { align-self: start; }

.form-actions { margin-top: 16px; }
.form-actions button { padding: 12px 28px; font-size: 16px; }

/* ---------- home feature cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 13px;
  margin-top: 4px;
  margin-bottom: 16px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-edge), transparent 60%), var(--panel);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 0.12s, border-color 0.15s, box-shadow 0.15s;
}
.card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow-strong), 0 0 0 1px var(--accent-dim);
}
.card .card-title {
  font-weight: 600;
  font-size: 16px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 7px;
}
.card .card-title::after {
  content: "→";
  margin-left: auto;
  color: var(--faint);
  transition: transform 0.15s, color 0.15s;
}
.card:hover .card-title::after { transform: translateX(3px); color: var(--accent); }
.card .card-desc { font-size: 14px; color: var(--muted); line-height: 1.5; }

/* collapsible advanced section */
details.advanced {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
details.advanced > summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  user-select: none;
}
details.advanced > summary::-webkit-details-marker { display: none; }
details.advanced > summary::marker { content: ""; }
details.advanced > summary::before {
  content: "▸";
  font-size: 12px;
  transition: transform 0.15s;
}
details.advanced[open] > summary::before { transform: rotate(90deg); }
details.advanced .controls { margin-top: 14px; }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 11px; border-bottom: 1px solid var(--border); }
th {
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.05em;
  border-bottom-color: var(--accent-strong);
}

/* Click-to-sort column headers (Wrecks page): headers look like plain ths.
   Every sortable header reserves a fixed-width arrow slot (::after), which
   stays empty until its column is the active sort — so clicking never
   changes a column's width. */
th[data-key] { cursor: pointer; user-select: none; }
th[data-key]:hover { color: var(--accent-strong); }
th[data-key]::after {
  content: "";
  display: inline-block;
  width: 1.1em;
  margin-left: 4px;
  font-size: 10px;
}
th[aria-sort="ascending"]::after { content: "▲"; }
th[aria-sort="descending"]::after { content: "▼"; }
tbody tr:nth-child(even) td { background: var(--zebra); }
tbody tr:hover td { background: var(--accent-dim); }
td { font-variant-numeric: tabular-nums; }

/* ---------- tags / badges ---------- */
.tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  background: var(--tag-bg);
  color: var(--muted);
  border: 1px solid var(--border);
  white-space: nowrap;
}
.tag.shelter, .tag.ok {
  color: var(--good);
  border-color: color-mix(in srgb, var(--good) 40%, transparent);
  background: color-mix(in srgb, var(--good) 12%, transparent);
}
.tag.warn {
  color: var(--warn);
  border-color: color-mix(in srgb, var(--warn) 40%, transparent);
  background: color-mix(in srgb, var(--warn) 12%, transparent);
}
.tag.bad {
  color: var(--bad);
  border-color: color-mix(in srgb, var(--bad) 40%, transparent);
  background: color-mix(in srgb, var(--bad) 12%, transparent);
}

/* ---------- type icon cells ---------- */
.type-cell { display: flex; align-items: center; gap: 9px; white-space: nowrap; color: var(--ink); }
.type-cell .type-icon {
  display: inline-block;
  width: 22px; height: 22px; flex: 0 0 22px;
  background-color: var(--accent);
  -webkit-mask-position: center; mask-position: center;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-size: contain; mask-size: contain;
}
.type-cell .type-label { font-size: 13px; color: var(--muted); text-transform: capitalize; }

/* ---------- numeric / instrument readouts ---------- */
/* the key information — sized up and weighted so it's the most legible thing */
.slack-cell, .bk-time, .tl-time, .slack-note {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 400;
}
.slack-cell { white-space: nowrap; }
.slack-cell .slack-sep, .slack-sep { color: var(--faint); margin: 0 5px; }

/* inline code (e.g. tide source / coverage on the home page) uses our mono,
   not the browser default monospace */
code, kbd, samp {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.92em;
}

.muted-note { color: var(--muted); font-size: 14px; line-height: 1.55; margin: -2px 0 14px; max-width: 70ch; }

.day-block { margin-bottom: 18px; }
.day-block:last-child { margin-bottom: 0; }
.day-header { font-size: 15px; margin: 12px 0 6px; color: var(--accent); font-weight: 700; letter-spacing: 0.02em; }

.empty { color: var(--muted); font-style: italic; padding: 16px; text-align: center; }

.error {
  color: var(--bad);
  background: color-mix(in srgb, var(--bad) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--bad) 32%, transparent);
  padding: 10px 13px;
  border-radius: 7px;
  font-size: 14px;
  margin-top: 10px;
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 34px;
  padding: 16px 22px 26px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

footer .build-stamp {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  opacity: 0.65;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 560px) {
  header .brand .sub { display: none; }
  main { padding: 18px 14px 8px; }
  h1 { font-size: 23px; }
  .controls { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}