/* Skarv Rock Light — sections (owner: frontend-claude) */
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }

/* ---------- 00 HERO ---------- */
#hero {
  --beam-x: 62%; --beam-y: 38%; --beam-on: 0;
  position: relative; isolation: isolate; overflow: clip;
  min-height: 100svh; display: grid; align-items: end;
  padding: calc(var(--header-h) + var(--s-8)) var(--gutter) clamp(var(--s-8), 10vh, var(--s-9));
  background: var(--ink);
}
#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
#hero::before { /* legibility floor + seam into the next section */
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(to top, var(--ink) 0%, transparent 38%),
    linear-gradient(to right, color-mix(in srgb, var(--ink) 70%, transparent), transparent 62%);
}
.hero-inner { position: relative; inline-size: 100%; max-inline-size: var(--measure); margin-inline: auto; display: grid; gap: var(--s-6); justify-items: start; }
.hero-kicker { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-3); color: var(--brass-ink); text-shadow: 0 1px 12px var(--ink); }
.hero-kicker .sep { color: var(--mist); }
#hero-title {
  position: relative; font-size: var(--fs-hero); line-height: var(--lh-tight); font-weight: 400; letter-spacing: -0.025em; max-inline-size: 17ch; text-wrap: balance; word-spacing: 0.03em;
}
.beam-text-base { display: block; color: var(--foam); text-shadow: 0 2px 40px var(--ink); }
.beam-text .line { display: inline-block; }
.beam-text .line + .line { font-style: italic; }
.beam-text-glow {
  position: absolute; inset: 0; display: block; pointer-events: none; color: transparent;
  --glow-core: #fff3cf; --glow-edge: transparent;
  background-image: radial-gradient(circle clamp(9rem, 24vmax, 26rem) at var(--beam-x) var(--beam-y), var(--glow-core), var(--glow-edge) 100%);
  background-attachment: fixed; -webkit-background-clip: text; background-clip: text;
  opacity: calc(var(--beam-on) * 1);
}
html[data-theme="light"] .beam-text-glow { --glow-core: #7d5710; }
.hero-sub { max-inline-size: 31rem; font-size: var(--fs-lg); font-weight: 400; line-height: 1.4; color: var(--foam); text-shadow: 0 1px 24px var(--ink); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--s-4); }
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-6); color: var(--mist); padding-block-start: var(--s-5); border-block-start: 1px solid var(--line); inline-size: min(100%, 36rem); }
.scroll-hint { position: absolute; right: var(--gutter); bottom: var(--s-6); display: flex; flex-direction: column; align-items: center; gap: var(--s-3); color: var(--mist); writing-mode: vertical-rl; }
.scroll-hint-line { inline-size: 1px; block-size: 56px; background: linear-gradient(var(--brass), transparent); }

/* no-WebGL fallback: CSS sea and a static beam */
#hero.no-webgl #hero-canvas { display: none; }
#hero.no-webgl { background:
    radial-gradient(120% 60% at 70% 0%, color-mix(in srgb, var(--sea) 80%, var(--ink)), var(--ink) 70%); }
#hero.no-webgl::after {
  content: ""; position: absolute; z-index: -1; inset: 0; pointer-events: none;
  background: conic-gradient(from 248deg at 72% 22%, transparent 0 8deg, var(--glow) 12deg, transparent 22deg 360deg);
  opacity: 0.55; filter: blur(8px);
}

/* ---------- 01 CROSSING ---------- */
.chart-frame { --chart-grid: var(--line); position: relative; border: 1px solid var(--line-strong); border-radius: var(--radius-lg); overflow: hidden; background: var(--sea); box-shadow: 0 30px 80px -40px var(--shadow); }
#route-chart { inline-size: 100%; block-size: auto; font-family: var(--font-mono); }
.chart-sea { fill: var(--sea); }
.chart-land { fill: var(--ink-2); stroke: var(--line-strong); stroke-width: 1.5; }
.chart-land-rock { fill: var(--ink); stroke: var(--brass-ink); stroke-width: 2; }
.chart-contour path { fill: none; stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 2 6; }
.chart-label { fill: var(--mist); font-size: 12px; letter-spacing: 0.06em; }
.chart-place { fill: var(--foam); font-size: 17px; font-family: var(--font-display); letter-spacing: 0; font-style: normal; }
.chart-sub { font-size: 12px; text-transform: uppercase; }
.chart-sounding { font-size: 12px; opacity: 0.8; }
.chart-harbour circle { fill: var(--foam); }
.chart-light { fill: var(--brass); }
.chart-light-halo { fill: var(--glow); }
.chart-compass circle, .chart-compass path { fill: none; stroke: var(--line-strong); stroke-width: 1.5; }
.chart-compass path { fill: var(--line); }
#route-path { fill: none; stroke: var(--brass-ink); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 1; stroke-dashoffset: 0; }
.route-ghost { fill: none; stroke: var(--mist); stroke-width: 1.5; stroke-dasharray: 3 7; opacity: 0.7; }
.boat-hull { fill: var(--foam); }
.boat-mast { stroke: var(--foam); stroke-width: 1.5; }
.boat-light { fill: var(--brass); }

.crossing-grid { margin-block-start: var(--s-8); display: grid; gap: var(--s-8); }
.crossing-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-6); counter-reset: step; }
.crossing-steps li { position: relative; padding-block-start: var(--s-5); border-block-start: 1px solid var(--line-strong); display: grid; gap: var(--s-2); align-content: start; transition: border-color var(--t-med); }
.crossing-steps li::before { content: ""; position: absolute; top: -4px; left: 0; inline-size: 7px; block-size: 7px; border-radius: 50%; background: var(--brass); }
.crossing-steps li:hover { border-block-start-color: var(--brass-ink); }
.crossing-steps h3 { font-size: var(--fs-lg); font-weight: 400; line-height: 1.15; }
.crossing-steps p { color: var(--mist); font-size: var(--fs-sm); line-height: 1.5; }
.step-time { color: var(--brass-ink); }
.crossing-rules { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-5); padding: var(--s-5) var(--s-6); border: 1px solid var(--line); border-radius: var(--radius-lg); background: color-mix(in srgb, var(--sea) 40%, transparent); }
.crossing-rules dd { font-size: var(--fs-md); }

/* ---------- 02 ROOMS (the tower) ---------- */
.tower { display: grid; justify-items: center; gap: var(--s-2); }
.room {
  --w: 100%; --lit: 0; --mx: 50%; --my: 50%;
  position: relative; inline-size: var(--w); display: grid; grid-template-columns: auto 1fr auto; grid-template-areas: "win head specs" "win desc specs" "win choose specs";
  column-gap: var(--s-6); row-gap: var(--s-3); align-items: start; padding: var(--s-6) var(--s-7);
  background: linear-gradient(135deg, color-mix(in srgb, var(--sea) 80%, var(--ink)), var(--ink-2));
  border: 1px solid var(--line-strong); border-radius: var(--radius-lg); overflow: hidden;
  transition: transform var(--t-med) var(--ease-out), border-color var(--t-fast), box-shadow var(--t-med);
}
.room[data-level="3"] { --w: 78%; border-radius: 60px 60px var(--radius-lg) var(--radius-lg); }
.room[data-level="2"] { --w: 90%; }
.room::before { /* pointer spotlight: the lantern follows you */
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: var(--lit);
  background: radial-gradient(22rem circle at var(--mx) var(--my), var(--glow), transparent 65%); transition: opacity var(--t-med);
}
.room:hover, .room:focus-within { --lit: 0.5; transform: translateY(-3px); border-color: var(--brass-ink); box-shadow: 0 24px 60px -30px var(--shadow); }
.room-window { grid-area: win; position: relative; inline-size: clamp(64px, 8vw, 104px); aspect-ratio: 3 / 4; border-radius: 999px 999px 6px 6px; border: 2px solid var(--line-strong); background: linear-gradient(to bottom, var(--sea), var(--ink)); overflow: hidden; }
.room-window::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 50% 70%, var(--brass), transparent 70%); opacity: 0.12; transition: opacity var(--t-med); }
.room:hover .room-window::after, .room:focus-within .room-window::after { opacity: 0.85; }
.room[data-room="lamp-room"] .room-window { border-radius: 50%; aspect-ratio: 1; }
.room[data-room="lamp-room"] .room-window::before { content: ""; position: absolute; inset: -40%; background: conic-gradient(from 0deg, transparent 0 40deg, var(--glow) 55deg, transparent 70deg 360deg); }
.room:not([data-room="lamp-room"]) .room-window::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(var(--line-strong), var(--line-strong)) 50% 0 / 1px 100% no-repeat, linear-gradient(var(--line-strong), var(--line-strong)) 0 42% / 100% 1px no-repeat; }
.room-head { grid-area: head; display: grid; gap: var(--s-1); }
.room-level { color: var(--brass-ink); }
.room-name { font-size: var(--fs-xl); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; }
.room-desc { grid-area: desc; max-inline-size: 34rem; color: var(--mist); font-size: var(--fs-md); }
.room-specs { grid-area: specs; display: grid; gap: var(--s-3); min-inline-size: 11rem; padding-inline-start: var(--s-5); border-inline-start: 1px solid var(--line); }
.room-specs dd { font-size: var(--fs-md); }
.room-choose { grid-area: choose; justify-self: start; display: inline-flex; align-items: center; gap: var(--s-2); min-height: 44px; font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--foam); text-decoration: none; border-block-end: 1px solid var(--brass-ink); }
.room-choose span { transition: transform var(--t-med) var(--ease-out); }
.room-choose:hover span { transform: translateY(4px); }
.tower-base { inline-size: 100%; margin-block-start: var(--s-3); padding-block-start: var(--s-3); border-block-start: 1px dashed var(--line-strong); color: var(--mist); text-align: center; }

/* ---------- 03 WEATHER ---------- */
#weather {
  /* storm palette, both themes */
  --ink: #050b14; --ink-2: #08121f; --sea: #0b1a2b; --foam: #eef3f7; --mist: #a9b8c8; --brass-ink: #e0ae52; --brass: #d9a441;
  --line: rgba(233,238,243,.16); --line-strong: rgba(233,238,243,.3); --glow: rgba(217,164,65,.5);
  color: var(--foam);
  background: linear-gradient(to bottom, transparent 0, var(--ink) 8rem, var(--ink) calc(100% - 8rem), transparent 100%);
}
main > #weather { padding-block: clamp(10rem, 16vw, 13rem); }
.weather-inner { max-inline-size: var(--measure); margin-inline: auto; transform-origin: 50% 50%; transform: rotate(calc(var(--storm) * -1.2deg)); }
.weather-inner .section-head { margin-inline: 0; }
#storm-reading { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-6); margin-block-end: var(--s-8); padding-block: var(--s-6); border-block: 1px solid var(--line-strong); }
.reading dd { font-size: var(--fs-xl); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; }
#storm-log { margin: 0; padding: var(--s-6) var(--s-6) var(--s-6) var(--s-7); border-inline-start: 3px solid var(--brass); background: color-mix(in srgb, var(--sea) 60%, transparent); border-radius: 0 var(--radius-lg) var(--radius-lg) 0; display: grid; gap: var(--s-4); }
.storm-log-meta { color: var(--brass-ink); }
.storm-log-text, .storm-log-typed { max-inline-size: 46rem; font-size: var(--fs-lg); line-height: 1.5; font-weight: 400; text-transform: none; letter-spacing: 0; }
.storm-log-typed { font-family: var(--font-mono); font-size: var(--fs-md); color: var(--foam); white-space: pre-wrap; min-block-size: 5lh; }
.storm-log-typed:empty { display: none; }
.storm-log-typed:not(:empty)::after { content: ""; display: inline-block; inline-size: 0.55em; block-size: 1em; margin-inline-start: 2px; vertical-align: -0.12em; background: var(--brass); animation: caret 1s steps(1) infinite; }
#storm-log:has(.storm-log-typed:not(:empty)) .storm-log-text { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.storm-log-foot { color: var(--mist); font-size: var(--fs-sm); font-style: italic; }

/* ---------- 04 LAMP ---------- */
.lamp-stage { display: grid; justify-items: center; gap: var(--s-6); padding: var(--s-8) 0; }
#lamp-character { position: relative; inline-size: clamp(180px, 34vw, 320px); aspect-ratio: 1; display: grid; place-items: center; }
#lamp-character::before { content: ""; position: absolute; inset: 22%; border-radius: 50%; background: radial-gradient(circle at 40% 35%, #fff3cf, var(--brass) 55%, #6e4a0c); box-shadow: 0 0 0 2px var(--ink), 0 0 0 3px var(--line-strong); }
.lamp-flash { position: absolute; inset: -40%; border-radius: 50%; pointer-events: none; background: radial-gradient(circle, var(--glow) 0, color-mix(in srgb, var(--glow) 40%, transparent) 25%, transparent 62%); opacity: 0; }
.lamp-ring { position: absolute; inset: 0; border-radius: 50%; border: 1px dashed var(--line-strong); }
.lamp-timeline { position: relative; inline-size: min(100%, 40rem); block-size: 56px; border-block-end: 1px solid var(--line-strong); }
.lamp-tick { position: absolute; bottom: 0; inset-inline-start: calc(var(--at) / 12 * 100%); inline-size: 1px; block-size: 10px; background: var(--line-strong); }
.lamp-tick.is-flash { block-size: 34px; inline-size: 6px; border-radius: 3px 3px 0 0; background: var(--brass); margin-inline-start: -3px; }
.lamp-cursor { position: absolute; bottom: 0; inset-inline-start: 0; inline-size: 2px; block-size: 56px; background: var(--foam); }
.lamp-scale { position: absolute; inset-inline: 0; top: calc(100% + var(--s-2)); display: flex; justify-content: space-between; color: var(--mist); }
.lamp-readout { display: flex; gap: var(--s-6); flex-wrap: wrap; justify-content: center; color: var(--mist); margin-block-start: var(--s-5); }
.lamp-readout-char { color: var(--brass-ink); }
.lamp-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-6) var(--s-5); padding-block-start: var(--s-6); border-block-start: 1px solid var(--line-strong); }
.lamp-specs dd { font-size: var(--fs-lg); font-weight: 400; }

/* ---------- 05 TABLE ---------- */
.menu-week { border-block-start: 1px solid var(--line-strong); }
.menu-week li { position: relative; display: grid; grid-template-columns: 5rem 1fr auto; align-items: baseline; gap: var(--s-4); padding: var(--s-5) var(--s-3); border-block-end: 1px solid var(--line); transition: padding var(--t-med) var(--ease-out), background-color var(--t-fast); }
.menu-week li::before { content: ""; position: absolute; inset-block: 0; inset-inline-start: 0; inline-size: 3px; background: var(--brass); transform: scaleY(0); transform-origin: 50% 100%; transition: transform var(--t-med) var(--ease-out); }
.menu-week li:hover, .menu-week li:focus-within, .menu-week li.is-today { padding-inline-start: var(--s-6); background: color-mix(in srgb, var(--sea) 45%, transparent); }
.menu-week li:hover::before, .menu-week li.is-today::before { transform: scaleY(1); }
.menu-day { color: var(--brass-ink); }
.menu-dish { font-size: var(--fs-xl); font-weight: 400; line-height: 1.1; letter-spacing: -0.015em; }
.menu-note { color: var(--mist); }
.menu-week li.is-today .menu-note::after { content: " · ce soir"; color: var(--brass-ink); }

/* ---------- 06 BOOK ---------- */
.book-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: var(--s-8); align-items: start; }
#tide-calendar { position: sticky; top: calc(var(--header-h) + var(--s-5)); }
.calendar-title { font-size: var(--fs-lg); font-weight: 400; display: grid; gap: var(--s-1); margin-block-end: var(--s-5); }
.calendar-sub { color: var(--mist); font-weight: 400; }
.tide-list { border-block: 3px double var(--line-strong); }
.tide-list li { display: grid; grid-template-columns: 1fr 15rem 4.5rem; align-items: stretch; border-inline-start: 4px solid transparent; border-block-end: 1px solid var(--line); min-block-size: 52px; }
.tide-list li:last-child { border-block-end: 0; }
.tide-list li > *, .tide-list li > button > * { display: flex; align-items: center; padding: var(--s-3) var(--s-3); }
.tide-list li > button { all: unset; box-sizing: border-box; display: contents; cursor: pointer; }
.tide-list li.is-pickable { cursor: pointer; }
.tide-list li.is-pickable:hover, .tide-list li.is-pickable:focus-within { background: var(--foam); color: var(--ink); }
.tide-list li.is-pickable:hover *, .tide-list li.is-pickable:focus-within * { color: inherit; }
.tide-list li.is-selected { border-inline-start-color: var(--brass-ink); font-weight: 700; }
.tide-list li > button:focus-visible { outline: none; }
.tide-list li:has(> button:focus-visible) { outline: 2px solid var(--brass-ink); outline-offset: -2px; }
.tide-date { font-size: var(--fs-md); }
.tide-meta { color: var(--mist); border-inline-start: 1px solid var(--line); }
.tide-status { justify-content: center; min-inline-size: 4rem; border-inline-start: 1px solid var(--line); }
.tide-status::before { content: "[" attr(data-s) "]"; font-weight: 700; }
html[data-theme="light"] .tide-list li[data-status="full"] .tide-date { color: var(--mist); }
.tide-list li[data-status="hold"] .tide-status { color: var(--foam); }
.calendar-legend { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); margin-block-start: var(--s-5); color: var(--mist); }
.calendar-legend b { font-weight: 700; color: var(--foam); }

#booking-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-5); padding-block: var(--s-7); border-block: 3px double var(--line-strong); }
#booking-form > .field-group, #booking-form > .field:not(.field-nights):not(.field-guests), #booking-form > .form-foot { grid-column: 1 / -1; }
.field-group { border: 0; padding: 0; margin: 0; min-inline-size: 0; display: grid; gap: var(--s-3); }
.field-group legend { padding: 0; margin-block-end: var(--s-3); font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--mist); }
.radio-row { display: grid; gap: var(--s-2); }
.radio { position: relative; display: flex; align-items: center; gap: var(--s-3); min-height: 52px; padding: 0 var(--s-2); border-bottom: 1px solid var(--foam); cursor: pointer; }
.radio::before { content: ""; flex: none; inline-size: 14px; block-size: 14px; border: 1px solid currentColor; }
.radio input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.radio span { display: flex; inline-size: 100%; justify-content: space-between; align-items: center; gap: var(--s-3); }
.radio small { color: var(--mist); }
.radio:hover { background: var(--foam); color: var(--ink); }
.radio:hover small { color: inherit; }
.radio:has(input:checked)::before { background: var(--brass-ink); border-color: var(--brass-ink); }
.radio:has(input:checked) span { font-weight: 700; }
.radio:has(input:focus-visible) { outline: 2px solid var(--brass-ink); outline-offset: 2px; }
.field { display: grid; gap: var(--s-2); align-content: start; min-inline-size: 0; }
.field label { font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--mist); }
.optional { color: var(--mist); }
.field input, .field select, .field textarea {
  inline-size: 100%; min-block-size: 48px; padding: var(--s-3) 0; background: transparent; color: var(--foam);
  border: 0; border-bottom: 1px solid var(--foam); border-radius: 0; font-size: var(--fs-md);
}
.field select option { background: var(--ink-2); color: var(--foam); }
.field textarea { resize: vertical; min-block-size: 96px; background-image: repeating-linear-gradient(transparent 0 calc(1.55em - 1px), var(--line) calc(1.55em - 1px) 1.55em); }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--brass-ink); outline-offset: 2px; }
html[data-theme="dark"] .field input:focus-visible, html[data-theme="dark"] .field select:focus-visible, html[data-theme="dark"] .field textarea:focus-visible { outline-color: var(--brass); }
.field [aria-invalid="true"] { border-bottom: 3px solid var(--signal); }
.field-help { color: var(--mist); text-transform: none; letter-spacing: 0.02em; }
.field-error { padding-inline-start: var(--s-3); border-inline-start: 3px solid var(--signal); color: var(--foam); font-size: var(--fs-sm); }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-5); margin-block-start: var(--s-3); }
.form-status { color: var(--foam); font-size: var(--fs-sm); }
.form-status:empty { display: none; }
.form-confirmation { padding: var(--s-7) 0; border-block: 3px double var(--brass-ink); display: grid; gap: var(--s-5); justify-items: start; }
.form-confirmation:focus-visible { outline-offset: 4px; }
.confirmation-title { font-size: var(--fs-xl); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; }
.confirmation-details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-4) var(--s-6); inline-size: 100%; padding-block: var(--s-5); border-block: 1px solid var(--line-strong); }
.confirmation-note { color: var(--mist); max-inline-size: 34rem; }
.book-grid:has(.form-confirmation:not([hidden])) #booking-form { display: none; }
.book-grid > .form-confirmation { grid-column: 2; }

/* ---------- FOOTER ---------- */
#site-footer { position: relative; z-index: var(--z-content); padding: var(--s-9) var(--gutter) var(--s-7); border-block-start: 1px solid var(--line-strong); background: var(--ink-2); }
.footer-grid { max-inline-size: var(--measure); margin-inline: auto; display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: var(--s-8); align-items: start; }
.footer-brand { display: grid; gap: var(--s-3); justify-items: start; }
.footer-brand .mono { color: var(--mist); }
.footer-name { font-size: var(--fs-xl); font-weight: 400; line-height: 1; }
.footer-contact { display: grid; gap: var(--s-4); }
.footer-colophon { color: var(--mist); font-size: var(--fs-sm); max-inline-size: 28rem; }
.footer-fine { max-inline-size: var(--measure); margin: var(--s-8) auto 0; padding-block-start: var(--s-5); border-block-start: 1px solid var(--line); color: var(--mist); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1100px) {
  .room { grid-template-columns: auto 1fr; grid-template-areas: "win head" "win desc" "win specs" "win choose"; padding: var(--s-6); }
  .room-specs { grid-auto-flow: column; grid-auto-columns: 1fr; padding-inline-start: 0; border-inline-start: 0; padding-block: var(--s-3); border-block: 1px solid var(--line); min-inline-size: 0; }
  .room[data-level="3"] { --w: 88%; } .room[data-level="2"] { --w: 94%; }
  .book-grid { grid-template-columns: 1fr; }
  .book-grid > .form-confirmation { grid-column: auto; }
  #tide-calendar { position: static; }
}
@media (max-width: 900px) {
  :root { --header-h: 6.25rem; }
  #site-header { flex-wrap: wrap; gap: 0 var(--s-3); padding-block: var(--s-1); }
  .brand { order: 1; margin-inline-end: auto; }
  #theme-toggle { order: 2; }
  #site-nav { order: 3; inline-size: calc(100% + 2 * var(--gutter)); margin: 0 calc(-1 * var(--gutter)); padding-inline: calc(var(--gutter) - var(--s-3)); overflow-x: auto; scrollbar-width: none; }
  #site-nav::-webkit-scrollbar { display: none; }
  #site-nav a { flex: none; }
  .crossing-steps { grid-template-columns: repeat(2, 1fr); }
  .crossing-rules { grid-template-columns: repeat(2, 1fr); }
  .lamp-specs { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--s-6); }
  .scroll-hint { display: none; }
}
@media (max-width: 640px) {
  #theme-toggle .tw-w { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  :root { --header-h: 6rem; }
  #hero { padding-block-end: var(--s-8); }
  .hero-inner { gap: var(--s-5); }
  .cta, .cta-quiet { inline-size: 100%; justify-content: space-between; }
  .hero-actions { inline-size: 100%; }
  .crossing-steps, .crossing-rules { grid-template-columns: 1fr; }
  .room { grid-template-columns: 1fr; grid-template-areas: "win" "head" "desc" "specs" "choose"; padding: var(--s-5); }
  .room, .room[data-level="3"], .room[data-level="2"] { --w: 100%; }
  .room[data-level="3"] { border-radius: 40px 40px var(--radius-lg) var(--radius-lg); }
  .room-window { inline-size: 56px; }
  .room-specs { grid-auto-flow: row; }
  #storm-reading { grid-template-columns: 1fr; gap: var(--s-4); }
  .menu-week li { grid-template-columns: 3.25rem 1fr; }
  .menu-note { grid-column: 2; }
  .menu-dish { font-size: var(--fs-lg); }
  .tide-list li { grid-template-columns: 1fr 4.5rem; }
  .tide-meta { grid-column: 1; grid-row: 2; }
  .tide-status { grid-column: 2; grid-row: 1 / 3; }
  #booking-form { grid-template-columns: 1fr; }
  .form-confirmation { padding: var(--s-6) 0; }
  .confirmation-details { grid-template-columns: 1fr; }
  .storm-log-text, .storm-log-typed { font-size: var(--fs-md); }
  #storm-log { padding: var(--s-5) var(--s-4) var(--s-5) var(--s-5); }
  /* chart: bigger labels in viewBox units, fewer of them */
  .chart-sounding, .chart-graticule, .chart-sub { display: none; }
  .chart-place { font-size: 34px; }
  .chart-harbour .chart-place { text-anchor: end; }
  #route-path, .route-ghost { stroke-width: 5; }
}
@media (min-width: 1700px) {
  :root { --measure: 80rem; }
}