* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --panel-bg: rgba(10, 25, 40, 0.82);
  --panel-border: rgba(120, 200, 255, 0.25);
  --sidebar-w: 486px;   /* desktop right column; the sea is everything left of it */
  --accent: #4fc3f7;
  --accent2: #ffd54f;
  --danger: #ff7043;
  --good: #66bb6a;
  --text: #e8f4fd;
  --text-dim: #8fb8d4;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
}

html, body { height: 100%; overflow: hidden; background: #06121e; }

/* Crawlable SEO copy (#seo-content): kept in the DOM and the accessibility tree
   for search engines and screen readers, but pulled off-screen so it never
   shows over the full-screen game. NOT display:none/visibility:hidden — those
   can suppress indexing; the clip pattern keeps the text live and indexable. */
.seo-content {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* touch-action: pan-y lets the panels scroll vertically but blocks the browser's
   pinch-zoom and double-tap-zoom everywhere in the UI. The 3D canvas sets its own
   touch-action:none (OrbitControls), so the water keeps its camera pinch. */
#app { position: relative; width: 100vw; height: 100vh; height: 100dvh; touch-action: pan-y; }
#scene { position: absolute; inset: 0; display: block; }

/* ---------- boot loader ---------- */
#boot-loader {
  position: fixed; inset: 0; z-index: 100; display: flex;
  align-items: center; justify-content: center; background: #06121e;
  transition: opacity 0.35s ease;
}
#boot-loader.off { opacity: 0; pointer-events: none; }
.boot-spinner {
  width: 44px; height: 44px; border-radius: 50%;
  border: 3px solid rgba(120, 200, 255, 0.2);
  border-top-color: var(--accent);
  animation: boot-spin 0.8s linear infinite;
}
@keyframes boot-spin { to { transform: rotate(360deg); } }

/* ---------- top HUD ----------
   Desktop: a vertical column down the LEFT edge, tucked under the meters.
   Keeping it off-centre frees the top-right corner for the demo/settings
   cluster, which used to overlap the radar. (Phones re-flow it into a flat
   horizontal row — see the mobile block.) */
/* ---------- right sidebar (desktop) ----------
   One column pinned to the right edge holding every control + readout, top to
   bottom: HUD (speed/wind/point-of-sail + radar), the meters row, then the rig
   controls. The sea gets the whole left of the screen; the boat is lens-shifted
   left to sit centred in it (see ui.js #applyFramingShiftX). */
#sidebar {
  position: absolute; top: 0; right: 0; bottom: 0; width: var(--sidebar-w); z-index: 20;
  display: flex; flex-direction: column; gap: 8px;
  padding: 14px;                    /* demo/settings live on the sea, left of here */
  overflow-y: auto; overflow-x: hidden;   /* natural height; only scrolls if a short screen can't fit it */
}

/* Desktop: HUD lives at the top of the right sidebar — speed/wind/point-of-sail
   on the left, the radar spanning the right (top-right). */
/* Top region: a tall radar on the left, and a right column that stacks the HUD
   row (BOARD SPEED / WIND / POINT OF SAIL) above the meters row. The radar
   stretches to the full height of that column. */
#hud-region { width: 100%; display: flex; gap: 8px; align-items: stretch; }
.hud-right { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.compass-box { flex: 0 0 auto; }   /* the radar — a square sized to the section height (see #compass) */

#hud-top {
  width: 100%;
  display: grid; gap: 6px;
  grid-template-columns: 1fr 1fr 1fr;   /* BOARD SPEED · WIND · POINT OF SAIL */
}
.hud-box {
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 10px; padding: 6px 6px; color: var(--text);
  min-width: 0; text-align: center; backdrop-filter: blur(6px);
  display: flex; flex-direction: column; justify-content: flex-start;   /* labels line up at the top */
}
/* Speed box has no sub-line (gust/glide moved out). Keep its label pinned to the
   top (in line with the WIND label) but center the value in the space below. */
#speed-box { display: flex; flex-direction: column; }
#speed-box .hud-value { margin-top: auto; margin-bottom: auto; }
.hud-label { font-size: 8.5px; letter-spacing: 0.8px; color: var(--text-dim); white-space: nowrap; }
.hud-value { font-size: 18px; font-weight: 700; margin-top: 1px; }
#pos-val { font-size: 12.5px; line-height: 1.2; }
.hud-unit { font-size: 9.5px; margin-left: 2px; color: var(--text-dim); }
.hud-sub { font-size: 9px; color: var(--text-dim); margin-top: 1px; min-height: 10px; }
/* Planing indicator lives in the SAIL POWER meter title (right side, where the
   trim word normally sits) — keeps it out of the compact HUD speed box. */
#planing-badge {
  display: none; margin-left: auto; font-size: 8.5px; font-weight: 700; color: #06121e;
  background: var(--accent2); border-radius: 4px; padding: 1px 5px;
  letter-spacing: 0.5px; animation: pulse 0.8s infinite alternate; flex: 0 0 auto;
}
#planing-badge.on { display: inline-block; }
@keyframes pulse { from { opacity: 0.75; } to { opacity: 1; } }
.compass-box { padding: 4px; min-width: 0; display: flex; align-items: center; justify-content: center; }
/* Radar is sized in JS (#sizeRadar) to a square matching the HUD+meters column
   height, so it fits perfectly with no leftover gap under the meters. */
#compass { display: block; }

/* ---------- meters ---------- */
/* Desktop: SAIL POWER + BALANCE side by side, in the sidebar flow. */
#meters {
  width: 100%;
  display: flex; flex-direction: row; gap: 8px;
}
#meters .meter-block { flex: 1; min-width: 0; }
#meters .meter-block:first-child { flex: 1.55; }   /* SAIL POWER needs room for the trim word / PLANING! badge */
.meter-block {
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 10px; padding: 6px 11px; color: var(--text); backdrop-filter: blur(6px);
}
.meter-title { font-size: 8.5px; letter-spacing: 0.8px; color: var(--text-dim); margin-bottom: 6px; display: flex; align-items: center; white-space: nowrap; }
.meter-hint { display: none; }   /* verbose caption — the diamond/band read for themselves */
#trim-state { margin-left: auto; font-weight: 700; flex: 0 0 auto; }
/* While planing the JS blanks the trim word so the PLANING! badge owns the
   right slot — but an empty flex item with margin-left:auto still eats the free
   space and strands the badge mid-row. Drop it from layout so the badge (also
   margin-left:auto) sits flush right. Desktop and mobile both. */
#trim-state:empty { display: none; }
#trim-state.luff  { color: var(--text-dim); }
#trim-state.good  { color: var(--good); }
#trim-state.stall { color: var(--danger); }
.meter-track {
  position: relative; height: 10px; border-radius: 5px;
  background: rgba(255,255,255,0.08); overflow: visible;
}
.meter-fill {
  height: 100%; width: 0%; border-radius: 5px;
  background: linear-gradient(90deg, #29b6f6, #ffd54f 75%, #ff7043);
  transition: width 0.12s linear;
}
#required-band {
  position: absolute; top: 0; height: 100%; background: rgba(255, 213, 79, 0.35);
  border: 1px solid rgba(255, 213, 79, 0.7); border-radius: 4px; width: 20%; left: 20%;
}
#lean-marker {
  position: absolute; top: 50%; width: 12px; height: 12px; background: var(--accent);
  transform: translate(-50%, -50%) rotate(45deg); left: 25%;
  border: 1px solid white; transition: left 0.1s linear;
}

/* ---------- hint bar ---------- */
/* Centred over the SEA (viewport minus the sidebar), like the boat — not the
   whole page. Mobile resets left:50% (no sidebar there). */
#hint-bar {
  position: absolute; bottom: 18px; left: calc(50% - var(--sidebar-w) / 2); transform: translateX(-50%);
  max-width: 640px; pointer-events: none; text-align: center;
}
#hint-text {
  display: inline-block; background: var(--panel-bg); border: 1px solid var(--panel-border);
  color: var(--accent2); border-radius: 10px; padding: 8px 18px; font-size: 13px;
  backdrop-filter: blur(6px); transition: opacity 0.3s;
}
#hint-text:empty { opacity: 0; }
#hint-text.warn { color: var(--danger); font-weight: 700; animation: pulse 0.5s infinite alternate; }

/* ---------- toast (why an action was blocked) ---------- */
#toast {
  position: absolute; left: calc(50% - var(--sidebar-w) / 2); bottom: 78px; z-index: 25;
  transform: translateX(-50%) translateY(8px);
  max-width: min(440px, 90vw); pointer-events: none; text-align: center;
  background: var(--panel-bg); border: 1px solid var(--accent2); color: var(--accent2);
  border-radius: 10px; padding: 10px 16px; font-size: 13px; line-height: 1.35;
  backdrop-filter: blur(6px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  opacity: 0; transition: opacity 0.2s ease, transform 0.2s ease;
}
#toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- welcome overlay ---------- */
/* The CARD is a fixed frame that stays put; only its inner .w-scroll region
   scrolls, so the SAIL AWAY button (a plain flex footer) is always pinned to
   the card's bottom with no gap. The card's max-height is capped in JS to
   window.innerHeight (#sizeWelcomeCard) rather than 100dvh — some in-app
   WebViews (Telegram, Instagram, …) over-measure dvh, which would push the
   button below the fold; window.innerHeight is measured reliably. */
#welcome-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  overflow: hidden;
  background: rgba(4, 16, 28, 0.55); z-index: 30;
  padding: 14px;
}
#welcome-overlay.off { display: none; }
#welcome-card {
  background: var(--panel-bg); border: 1px solid var(--accent); border-radius: 16px;
  padding: 26px 34px 0; color: var(--text); width: 100%; max-width: 560px; backdrop-filter: blur(10px);
  font-size: 13px; line-height: 1.55;
  max-height: 100%;   /* JS (#sizeWelcomeCard) caps this to window.innerHeight for WebViews */
  overflow: hidden;
  display: flex; flex-direction: column;
}
/* Only the text scrolls; the card frame + SAIL AWAY footer stay fixed. */
#welcome-card .w-scroll {
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  flex: 1 1 auto; min-height: 0;
}
#welcome-card .w-title { font-size: 22px; font-weight: 800; letter-spacing: 2px; color: var(--accent); margin-bottom: 12px; }
#welcome-card p { margin: 8px 0; }
#welcome-card ol { margin: 10px 0 10px 20px; }
#welcome-card li { margin: 6px 0; }
#welcome-card .w-goal { color: var(--text-dim); }
#welcome-card .w-tip {
  margin-top: 12px; padding: 10px 12px; border-radius: 10px;
  background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.10);
  color: var(--text-dim); font-size: 12.5px;
}
#welcome-card .w-tip b { color: var(--text); }
#welcome-close {
  /* plain footer at the card's bottom — the card doesn't scroll, only .w-scroll does */
  flex: 0 0 auto;
  margin: 14px -34px 0; padding: 15px 34px calc(15px + env(safe-area-inset-bottom, 0px));
  background: var(--accent); color: #06121e; border: none;
  border-radius: 0 0 15px 15px; font-size: 14px; font-weight: 800; letter-spacing: 2px;
  cursor: pointer; font-family: inherit;
}
#welcome-close:hover { filter: brightness(1.15); }

/* ---------- about overlay ---------- */
#about-overlay {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(4, 16, 28, 0.55); z-index: 31;
}
#about-overlay.off { display: none; }
#about-card {
  background: var(--panel-bg); border: 1px solid var(--accent); border-radius: 16px;
  padding: 26px 34px; color: var(--text); max-width: 400px; width: calc(100% - 48px);
  backdrop-filter: blur(10px); text-align: center; font-size: 13px; line-height: 1.55;
}
#about-card .w-title { font-size: 22px; font-weight: 800; letter-spacing: 2px; color: var(--accent); margin-bottom: 16px; }
.about-app { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 4px 0 2px; }
/* App-icon tile (its own light-sky background baked in) */
.about-app img { border-radius: 13px; }
.about-app-name { font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.about-tagline { margin: 8px 0 18px; color: var(--text-dim); }
.about-author { display: flex; flex-direction: column; gap: 3px; margin: 4px 0 14px; }
.about-madeby { font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--text-dim); }
.about-name { font-size: 17px; font-weight: 700; }
.about-email { color: var(--accent); text-decoration: none; font-size: 13px; }
.about-email:hover { text-decoration: underline; }
.about-thanks { color: var(--text-dim); margin: 0 0 10px; }
.about-github {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--text); text-decoration: none; font-size: 13px; font-weight: 600;
  padding: 8px 16px; border: 1px solid var(--line, rgba(255,255,255,.18)); border-radius: 10px;
}
.about-github:hover { border-color: var(--accent); color: var(--accent); }
.about-github svg { display: block; }
/* Quiet "Made in Ukraine 🇺🇦" line — small and dim so it reads as a footnote. */
.about-madein { margin: 4px 0 14px; font-size: 11px; letter-spacing: 0.5px; color: var(--text-dim); opacity: 0.7; }
#about-close {
  margin-top: 16px; width: 100%; background: var(--accent); color: #06121e; border: none;
  border-radius: 10px; padding: 12px; font-size: 14px; font-weight: 800; letter-spacing: 2px;
  cursor: pointer; font-family: inherit;
}
#about-close:hover { filter: brightness(1.15); }

/* ---------- crash overlay ---------- */
#crash-overlay {
  position: absolute; inset: 0; display: none; align-items: center; justify-content: center;
  background: rgba(4, 16, 28, 0.45); z-index: 20;
  cursor: pointer; touch-action: none;
}
/* stop iOS from selecting text / showing the callout when you press-and-hold */
#crash-overlay, #crash-overlay * {
  user-select: none; -webkit-user-select: none; -webkit-touch-callout: none;
}
#crash-overlay.on { display: flex; }
#crash-card {
  background: var(--panel-bg); border: 2px solid var(--danger); border-radius: 16px;
  padding: 28px 40px; text-align: center; color: var(--text); max-width: 480px;
  backdrop-filter: blur(8px);
}
#crash-title { font-size: 34px; font-weight: 800; color: var(--danger); letter-spacing: 2px; }
#crash-reason { font-size: 15px; margin-top: 10px; }
#crash-lesson { font-size: 12px; margin-top: 12px; color: var(--accent2); line-height: 1.5; }
#crash-timer { font-size: 11px; margin-top: 14px; color: var(--text-dim); }

/* ---------- control panel ---------- */
/* ---------- top-right buttons (info + settings) ---------- */
/* Demo + settings sit on the sea; the gap to the panel's visible edge (radar/HUD,
   which starts 14px inside the sidebar padding) matches the 6px demo↔settings gap.
   right = sidebar width − 14px padding + 6px gap. */
#top-buttons { position: absolute; right: calc(var(--sidebar-w) - 8px); top: 14px; z-index: 30; display: flex; gap: 6px; }
/* Demo transport (pause). On BOTH desktop and phone this lives here, away from
   the top-right cluster — on desktop that cluster would otherwise grow left into
   the centred HUD (WIND box + compass) whenever a demo runs. The holder is a
   zero-size flex box until a demo un-hides its button. Desktop home: the clear
   bottom-left corner; phones re-home it top-right (mobile block below). */
#demo-transport {
  position: absolute; z-index: 30; display: flex; gap: 6px;
  left: 14px; bottom: 14px;
}
#app.demo-running .demo-only { display: flex !important; }
#settings-toggle {
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 8px; color: var(--text); backdrop-filter: blur(6px);
  cursor: pointer; font-family: inherit; font-weight: 700; letter-spacing: 1.5px;
  padding: 6px 9px; display: flex; align-items: center; justify-content: center;
}
#settings-toggle svg { display: block; }
#settings-toggle:hover, #settings-toggle.open { border-color: var(--accent); color: var(--accent); }

/* ---------- pause button (shown only while a demo runs) ---------- */
#pause-toggle {
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 8px; color: var(--text); backdrop-filter: blur(6px);
  cursor: pointer; font-family: inherit; font-weight: 700;
  padding: 6px 9px; display: flex; align-items: center; justify-content: center;
  transition: transform 0.12s ease;
}
#pause-toggle svg { display: block; }
#pause-toggle:hover { border-color: var(--accent); color: var(--accent); }
/* the pause pill turns amber while everything is frozen */
#pause-toggle.paused { border-color: var(--accent); color: var(--accent); }
/* both are demo-only: hidden until #demo-transport is marked demo-on (they live
   in that holder on every viewport — see #demo-transport above) */
.demo-only { display: none !important; }

/* ---------- guided-demo button ---------- */
#demo-toggle {
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 8px; color: var(--text); backdrop-filter: blur(6px);
  cursor: pointer; font-family: inherit; font-weight: 700; letter-spacing: 1.5px;
  font-size: 11px; padding: 6px 11px; display: flex; align-items: center; gap: 6px;
}
#demo-toggle svg { display: block; }
#demo-toggle:hover, #demo-toggle.open { border-color: var(--accent); color: var(--accent); }
/* while a tour runs the pill IS the stop button — red so it reads as "■ stop" */
#demo-toggle.running {
  border-color: var(--danger); color: var(--danger);
  box-shadow: 0 0 10px rgba(255, 112, 67, 0.4);
}
#demo-toggle.running:hover { border-color: var(--danger); color: var(--danger); }

/* ---------- demo popover ---------- */
#demo-panel {
  position: absolute; right: calc(var(--sidebar-w) + 2px); top: 52px; width: 280px; z-index: 30;
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 12px; color: var(--text); backdrop-filter: blur(8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4); overflow: hidden;
}
#demo-panel.off { display: none; }
#demo-close {
  background: none; border: 1px solid var(--panel-border); color: var(--text);
  border-radius: 6px; width: 22px; height: 22px; cursor: pointer; font-size: 15px; line-height: 1;
}
.demo-intro { font-size: 11px; line-height: 1.5; color: var(--text-dim); margin-bottom: 12px; }
.demo-mode {
  display: block; width: 100%; text-align: left; margin-bottom: 8px;
  background: rgba(255,255,255,0.06); border: 1px solid var(--panel-border);
  border-radius: 8px; padding: 9px 12px; color: var(--text); cursor: pointer; font-family: inherit;
}
.demo-mode:hover { border-color: var(--accent); }
.demo-mode.active { border-color: var(--good); background: rgba(102, 187, 106, 0.14); }
.demo-mode-name { display: block; font-size: 12px; font-weight: 700; letter-spacing: 0.5px; }
.demo-mode-desc { display: block; font-size: 10px; line-height: 1.4; color: var(--text-dim); margin-top: 2px; }

/* ---------- demo narration banner ----------
   Shares the SAME bottom slot as every transient message: low-centre on desktop,
   full-width just above the control sheet on phones (bottom set in JS). */
#demo-caption {
  position: absolute; left: calc(50% - var(--sidebar-w) / 2); bottom: 58px; z-index: 24;
  transform: translateX(-50%);
  max-width: min(560px, 92vw); pointer-events: none; text-align: center;
  background: var(--panel-bg); border: 1px solid var(--good); border-radius: 10px;
  padding: 8px 16px; backdrop-filter: blur(6px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
  transition: opacity 0.3s ease;
}
#demo-caption.off { opacity: 0; }
#demo-cap { font-size: 13px; line-height: 1.4; color: var(--text); }

/* ---------- settings popover ---------- */
/* Settings is a full-screen centred modal (same pattern as #about-overlay):
   a dim backdrop + a card. #settings-panel is the backdrop, #settings-card the card. */
#settings-panel {
  position: absolute; inset: 0; z-index: 31;
  display: flex; align-items: center; justify-content: center;
  background: rgba(4, 16, 28, 0.55);
}
#settings-panel.off { display: none; }
#settings-card {
  width: 400px; max-width: calc(100% - 40px); max-height: calc(100% - 40px);
  overflow-y: auto; color: var(--text);
  background: var(--panel-bg); border: 1px solid var(--accent);
  border-radius: 16px; backdrop-filter: blur(10px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
  padding: 26px 32px;
}
/* centred title, same treatment as the About modal's .w-title */
#settings-card .w-title {
  font-size: 22px; font-weight: 800; letter-spacing: 2px; color: var(--accent);
  text-align: center; margin-bottom: 20px;
}
/* .settings-header is still used by the guided-demo popover (its own × close) */
.settings-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; font-size: 11px; letter-spacing: 2px; color: var(--accent);
  border-bottom: 1px solid var(--panel-border);
}
.settings-body { padding: 14px; }
/* the card owns the padding now; the settings body sits flush inside it */
#settings-card .settings-body { padding: 0; }
/* settings section titles sit 2px larger than the in-panel controls for readability */
#settings-card .ctl-label { font-size: 14px; }
/* bottom CLOSE button — identical to the About modal's #about-close */
#settings-close {
  margin-top: 20px; width: 100%; background: var(--accent); color: #06121e; border: none;
  border-radius: 10px; padding: 12px; font-size: 14px; font-weight: 800; letter-spacing: 2px;
  cursor: pointer; font-family: inherit;
}
#settings-close:hover { filter: brightness(1.15); }
.settings-action {
  display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%;
  margin-top: 4px; padding: 9px; background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border); border-radius: 8px; color: var(--text);
  cursor: pointer; font-family: inherit; font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
}
.settings-action svg { display: block; }
.settings-action:hover { border-color: var(--accent); color: var(--accent); }

/* Language dropdown — enough locales that a segmented row won't fit. */
.lang-select {
  width: 100%; padding: 8px 10px; background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border); border-radius: 8px; color: var(--text);
  font-family: inherit; font-size: 12px; cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8' fill='none' stroke='%238fb8d4' stroke-width='1.6'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; background-size: 11px;
}
.lang-select:focus { outline: none; border-color: var(--accent); }
.lang-select option { background: #0a1928; color: var(--text); }

/* Desktop: the rig controls are the bottom section of the sidebar column
   (the sidebar itself scrolls if the stack is taller than the viewport). */
#panel {
  width: 100%;
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 12px; color: var(--text); backdrop-filter: blur(8px);
}
.panel-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 11px 15px; font-size: 13px; letter-spacing: 2px; color: var(--accent);
  border-bottom: 1px solid var(--panel-border); position: sticky; top: 0;
  background: rgba(10, 25, 40, 0.95); border-radius: 12px 12px 0 0;
}
/* No collapsing on desktop — the panel is always open there. The toggle (and the
   header-tap collapse in ui.js) come back only on the mobile bottom sheet. */
#panel-toggle {
  display: none;
  background: none; border: 1px solid var(--panel-border); color: var(--text);
  border-radius: 6px; width: 22px; height: 22px; cursor: pointer; font-size: 14px; line-height: 1;
}
#panel-body { padding: 11px 15px 12px; }

/* Desktop only: the panel sits at its natural height (it does NOT stretch to the
   bottom — that made huge gaps on tall screens). Each row gets a fixed, roomy
   spacing instead, the same on every screen size. */
@media (min-width: 769px) {
  #panel-body .ctl { margin-bottom: 15px; }
  #panel-body .ctl:last-child { margin-bottom: 0; }
  /* Desktop: Autopilot lives inside the SAIL SHEET row (so mobile can right-align
     it on that line), but here it wraps to its OWN full-width row above the sheet
     label — its historic "own top row", set off with a divider. (Selector is
     scoped to .sheet-head to outrank the base #autotrim-row rule below it.) */
  .sheet-head { flex-wrap: wrap; }
  .sheet-head #autotrim-row { order: -1; flex: 0 0 100%; border-bottom: 1px solid var(--panel-border); padding-bottom: 10px; margin-bottom: 10px; }
  /* wind icon on the TRUE WIND label, like the mobile wind fader */
  #wind-ctl .ctl-label::before { content: "💨"; font-size: 13px; line-height: 1; }
  /* the SPLASH! crash card centres in the SEA (viewport minus the sidebar), like the boat */
  #crash-overlay { padding-right: var(--sidebar-w); }
}
#panel.collapsed #panel-body { display: none; }

.ctl { margin-bottom: 11px; }
.ctl-label {
  font-size: 12px; letter-spacing: 1.2px; color: var(--text-dim); margin-bottom: 5px;
  display: flex; align-items: center; gap: 6px;
}
.ctl-value { margin-left: auto; color: var(--text); font-weight: 700; font-size: 14px; }
.ctl-hint { margin-left: auto; letter-spacing: 0; text-transform: none; font-size: 10px; color: var(--text-dim); opacity: 0.75; font-weight: 400; }
.key-hint {
  font-size: 10px; color: var(--text-dim); border: 1px solid var(--panel-border);
  border-radius: 4px; padding: 0 4px;
}
.ctl-sub { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--text-dim); margin-top: 4px; }

/* sliders own their touch drag in both axes (esp. the vertical wind fader),
   and swallow pinch so two fingers on a slider can't zoom the page either */
input[type="range"] { width: 100%; accent-color: var(--accent); height: 20px; touch-action: none; }
.slider-wrap { position: relative; touch-action: none; }   /* own the whole wrap's touch, not just the thin input */
#sheet-optimal {
  position: absolute; top: -3px; width: 3px; height: 14px; background: var(--good);
  border-radius: 2px; left: 50%; pointer-events: none; transition: left 0.15s linear;
  box-shadow: 0 0 6px var(--good);
}

.seg { display: flex; gap: 4px; }
.seg button {
  flex: 1; background: rgba(255,255,255,0.06); color: var(--text-dim);
  border: 1px solid var(--panel-border); border-radius: 6px; padding: 11px 3px;
  font-size: 11.5px; cursor: pointer; font-family: inherit;
}
.seg button:hover { background: rgba(255,255,255,0.12); }
.seg button.active { background: var(--accent); color: #06121e; font-weight: 700; border-color: var(--accent); }
.seg button.blocked { outline: 1px solid var(--danger); }

.toggle-row {
  display: flex; align-items: center; gap: 8px; font-size: 13.5px; cursor: pointer;
  padding: 5px 0; user-select: none;
}
.toggle-row input { accent-color: var(--accent); width: 17px; height: 17px; }
.sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.sheet-head .ctl-label { margin-bottom: 0; flex: 0 1 auto; min-width: 0; }
#autotrim-row { font-size: 14px; flex: none; padding: 0; white-space: nowrap; }   /* Autopilot label a touch larger than the rest */
/* Daggerboard (left) + Harness (right) share one row, spread to the edges so
   the free space on the right is used instead of stacking them. Slightly
   smaller so both labels — incl. the long ones (uk "Зачепитися в трапецію") —
   fit side by side; longer translations wrap back to two lines gracefully. */
.toggles-row {
  display: flex; flex-direction: row; flex-wrap: wrap;
  justify-content: space-between; align-items: center; gap: 4px 6px;
}
.toggles-row .toggle-row { font-size: 12.5px; gap: 7px; flex: 0 1 auto; white-space: nowrap; }
.toggles-row .toggle-row input { width: 16px; height: 16px; }

.btn-row { display: flex; gap: 6px; }
.action-btn {
  flex: 1; background: rgba(79, 195, 247, 0.15); border: 1px solid var(--accent);
  color: var(--accent); border-radius: 8px; padding: 13px 4px; font-size: 13px;
  font-weight: 700; cursor: pointer; font-family: inherit; letter-spacing: 1px;
}
.action-btn:hover { background: rgba(79, 195, 247, 0.3); }
.action-btn:disabled { opacity: 0.35; cursor: default; }
.action-btn.subtle { border-color: var(--panel-border); color: var(--text-dim); }

#help-note {
  position: absolute; bottom: 6px; left: 14px; font-size: 10px; color: rgba(200,230,255,0.4);
  pointer-events: none;
}

/* =====================================================================
   MOBILE  —  bottom-sheet controls, compact HUD, touch-friendly
   ===================================================================== */
@media (max-width: 768px) {

  /* The desktop right-sidebar wrapper dissolves on phones: its children
     (#hud-top, #meters, #panel) go back to being positioned against #app so
     every mobile rule below keeps working exactly as before. */
  #sidebar, #hud-region, .hud-right { display: contents; }
  #hud-top, #meters { position: absolute; }

  /* ---- control panel becomes a collapsible bottom sheet ----
     Anchored to the bottom of #app, which is sized with 100dvh (dynamic
     viewport height). dvh excludes the iOS Safari bottom toolbar, so the
     bar — and its toggle — sit ABOVE the browser chrome instead of behind
     it (position:fixed / 100vh both hide it under the toolbar). */
  #panel {
    position: absolute;
    left: 0; right: 0; top: auto; bottom: 0;
    width: 100%; max-width: 100%;
    max-height: 62vh; max-height: 62dvh;   /* generous cap — trimmed content fits without scrolling */
    border-radius: 16px 16px 0 0;
    border-left: 0; border-right: 0; border-bottom: 0;
    box-shadow: 0 -10px 28px rgba(0, 0, 0, 0.45);
    -webkit-overflow-scrolling: touch;
  }

  /* the tappable / swipeable bar (also the whole collapsed state) */
  .panel-header {
    position: relative;
    align-items: center;
    padding: 5px 14px 4px;                                   /* thinner header */
    padding-bottom: calc(4px + env(safe-area-inset-bottom)); /* clear the home bar */
    border-radius: 16px 16px 0 0;
    cursor: pointer;
    font-size: 11px;
  }
  #panel-toggle {
    display: inline-block;
    width: 26px; height: 22px; font-size: 17px; line-height: 1;
    background: rgba(79, 195, 247, 0.16); border-color: var(--accent); color: var(--accent);
  }
  /* the open sheet doesn't need the header's home-bar padding — the body has it */
  #panel:not(.collapsed) .panel-header { padding-bottom: 8px; }

  #panel-body {
    padding: 8px 12px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom));
  }

  /* ---- controls ~2x more compact ---- */
  .ctl { margin-bottom: 6px; }
  .ctl-label { font-size: 9px; margin-bottom: 3px; gap: 5px; }
  .ctl-value { font-size: 10px; }
  .ctl-sub { font-size: 8px; margin-top: 2px; }
  .key-hint { font-size: 8px; padding: 0 3px; }
  .seg { gap: 4px; }
  .seg button { padding: 7px 2px; font-size: 9px; border-radius: 5px; }
  .action-btn { padding: 8px 4px; font-size: 10px; }
  .btn-row { gap: 5px; }
  .toggle-row { padding: 3px 0; font-size: 10.5px; gap: 7px; }
  .toggle-row input { width: 16px; height: 16px; }
  input[type="range"] { height: 20px; }

  /* the two soft orientation hints are redundant on phones (the live value
     already reads it out) — reclaim the vertical space. Rake's stays. */
  .ctl-sub-soft { display: none; }

  /* Auto-trim rides on the SAIL SHEET label line instead of its own row */
  .sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 3px; }
  .sheet-head .ctl-label { margin-bottom: 0; flex: 0 1 auto; min-width: 0; }
  #autotrim-row { padding: 0; flex: none; font-size: 12px; white-space: nowrap; }
  .tr-note { display: none; }               /* "(sheets for you)" — desktop only */

  /* Daggerboard + Harness already share a row (base rule); nothing extra here. */

  /* ---- demo transport (pause): tucked snug under the BALANCE meter (which
     bottoms at ~77px) with a 6px gap, so no dead space opens above it. The wind
     fader begins just below this row — the region between the meter and the
     fader is exactly one button tall, filled by the button while a demo runs. ---- */
  #demo-transport {
    position: absolute; z-index: 16; right: 8px; left: auto; bottom: auto;
    top: calc(83px + env(safe-area-inset-top));
    display: flex; gap: 5px;
  }

  /* ---- TRUE WIND: slim vertical fader on the sea's right edge ----
     Top is fixed just below the transport-button row (83 + 38 + 6 = 127px);
     bottom + slider height are set in JS so it always sits flush above the
     control sheet — so its height scales with the phone's display height. */
  .wind-fader {
    position: absolute; z-index: 15; margin: 0;
    right: calc(6px + env(safe-area-inset-right));
    top: calc(127px + env(safe-area-inset-top));
    bottom: 84px;                        /* JS overrides to track the sheet */
    width: 44px;
    display: flex; flex-direction: column; align-items: center; gap: 5px;
    padding: 8px 4px;
    background: var(--panel-bg); border: 1px solid var(--panel-border);
    border-radius: 12px; backdrop-filter: blur(6px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  }
  .wind-fader .ctl-label {
    flex-direction: column; align-items: center; gap: 1px; margin: 0;
    font-size: 7px; letter-spacing: 0.3px; text-align: center; line-height: 1.1;
  }
  .wind-fader .wind-cap { display: none; }             /* glyph stands in for the caption */
  .wind-fader .ctl-label > span[data-i18n] { display: none; }  /* phones: drop the "WIND SPEED" caption on the vertical fader */
  .wind-fader .ctl-label::before { content: "💨"; font-size: 12px; line-height: 1; }
  .wind-fader .ctl-value { margin: 0; font-size: 8.5px; line-height: 1.1; }
  /* value on top, unit below — and the unit never breaks mid-string */
  .wind-fader .wf-num { display: block; font-size: 11px; font-weight: 700; color: var(--text); }
  .wind-fader .wf-unit { display: block; white-space: nowrap; font-size: 8px; color: var(--text-dim); }
  .wind-fader input[type="range"] {
    writing-mode: vertical-lr; direction: rtl;
    -webkit-appearance: slider-vertical;   /* older iOS Safari fallback; modern uses writing-mode */
    width: 22px; min-height: 70px;         /* height set in JS to fill the fader */
    padding: 0; margin: 0;
  }

  /* ---- top HUD: wide, flat boxes filling the row (compass dropped) ----
     Span from the left edge to just before the top-right buttons; flex:1 makes
     the three boxes wide, which also lets the labels sit on one line (flatter). */
  #hud-top {
    top: calc(6px + env(safe-area-inset-top));
    left: 8px; right: 100px; width: auto; transform: none; max-width: none;   /* clear the demo + gear cluster */
    display: flex; flex-direction: row;                           /* undo the desktop grid */
    gap: 6px; padding: 0; justify-content: flex-start;
  }
  /* boxes stay flat AND a constant height (single-line labels, tight metrics,
     min-height floors every box to the tallest state) so the row never grows or
     shrinks as the gust / planing lines come and go — and never reaches the
     meters row below it. */
  .hud-box { flex: 1; min-width: 0; max-width: none; padding: 2px 8px; border-radius: 8px; min-height: 36px; }
  .hud-label { font-size: 7px; letter-spacing: 0.2px; line-height: 1.1; white-space: nowrap; }
  .hud-value { font-size: 14px; margin-top: 0; line-height: 1.0; }
  .hud-unit { font-size: 8px; margin-left: 2px; }
  #pos-val { font-size: 10px; line-height: 1.05; }
  .hud-sub { font-size: 7px; min-height: 0; line-height: 1.0; }
  #planing-badge { font-size: 7px; padding: 0 4px; margin-left: auto; }   /* flush right in the SAIL POWER row */

  /* ---- radar/compass: floating widget under the meters (no room in the HUD row) ---- */
  .compass-box {
    display: block; position: fixed; z-index: 15;
    top: calc(80px + env(safe-area-inset-top)); left: 8px;
    padding: 3px; min-width: 0; border-radius: 10px;
  }
  #compass { width: 88px; height: 88px; }

  /* ---- meters: one row, power (left) + balance (right) ----
     just below the constant-height HUD row (which bottoms at ~42px). */
  #meters {
    top: calc(45px + env(safe-area-inset-top));
    left: 8px; right: 8px; width: auto;
    flex-direction: row; gap: 6px;
  }
  .meter-block { flex: 1; min-width: 0; padding: 4px 10px; border-radius: 8px; }
  .meter-title { font-size: 7.5px; margin-bottom: 3px; }
  .meter-hint { display: none; }
  .meter-track { height: 10px; }
  #lean-marker { width: 10px; height: 10px; }

  /* ---- info + settings buttons in the top-right corner ---- */
  #top-buttons {
    right: 8px; left: auto;
    top: calc(6px + env(safe-area-inset-top));
    gap: 5px;
  }
  #settings-toggle { padding: 0 11px; height: 38px; border-radius: 10px; }
  #settings-toggle svg { width: 19px; height: 19px; }
  #pause-toggle { padding: 0 11px; height: 38px; border-radius: 10px; }
  #pause-toggle svg { width: 18px; height: 18px; }
  /* #settings-panel is a full-screen modal on every viewport (base rule) — no
     mobile-specific positioning needed. */
  /* settings titles keep the +2px bump over the compact mobile controls (9px → 11px) */
  #settings-card .ctl-label { font-size: 11px; }

  /* demo button: icon-only to fit the tight top-right cluster */
  #demo-toggle { padding: 0 11px; height: 38px; border-radius: 10px; gap: 0; }
  #demo-toggle svg { width: 16px; height: 16px; }
  .demo-btn-label { display: none; }
  #demo-panel {
    right: 8px; top: calc(50px + env(safe-area-inset-top));
    width: min(260px, calc(100vw - 16px));
  }

  /* narration banner: full-width, just above the control sheet (bottom set in JS),
     same slot the toast uses so all transient messages share one place */
  #demo-caption {
    left: 6px; right: 56px; top: auto; bottom: 78px; transform: none;   /* clear the wind fader */
    max-width: none; text-align: center; padding: 7px 11px; border-radius: 9px;
  }
  #demo-cap { font-size: 10.5px; line-height: 1.32; }

  /* ---- coaching hint lifts above the collapsed bar ---- */
  #hint-bar { left: 50%; bottom: calc(64px + env(safe-area-inset-bottom)); max-width: 92%; }
  #hint-text { font-size: 11px; padding: 6px 12px; }
  /* toast spans the screen just above the control sheet (offset set in JS) */
  #toast {
    left: 6px; right: 6px; max-width: none;
    transform: translateY(8px);
    font-size: 10.5px; line-height: 1.3; padding: 7px 10px;
  }
  #toast.on { transform: translateY(0); }

  /* no physical keys on a phone — hide the keyboard-shortcut badges */
  .key-hint { display: none; }

  /* ---- orbit help note is irrelevant on touch ---- */
  #help-note { display: none; }

  /* ---- it's a game UI, not a document: no text selection or the iOS
     long-press callout anywhere on the page (sliders/buttons still work) ---- */
  #app, #app * {
    -webkit-user-select: none; user-select: none;
    -webkit-touch-callout: none;
  }

  /* ---- overlays fit the viewport ---- */
  #welcome-card {
    padding: 20px 22px 0; max-width: 100%;
    font-size: 12px;
  }
  #welcome-card .w-title { font-size: 18px; }
  #welcome-close { margin: 14px -22px 0; padding: 15px 22px calc(15px + env(safe-area-inset-bottom, 0px)); }
  #crash-card { padding: 22px 24px; max-width: 90vw; }
  #crash-title { font-size: 28px; }
}

/* very narrow phones — squeeze the HUD a touch more */
@media (max-width: 380px) {
  .hud-box { padding: 3px 4px; }
  .hud-value { font-size: 12px; }
}