/* Flow Race: a pump room at night. Copper pipes, brass fittings, glass tanks; the water is the only bright thing. */
:root {
    --tt-topnav-h: 56px;
    --bg: #0a1417;
    --bg-2: #0d1b20;
    --panel: #10232a;
    --line: rgba(150, 205, 215, 0.14);
    --text: #e8f2f3;
    --muted: #97afb5;
    --copper: #c47a44;
    --copper-lo: #4b2612;
    --brass: #d8b45f;
    --water: #3cc8f0;
    --go: #3ad291;
    --stop: #ef5058;
    --ink: #061014;
    --radius: 14px;
    --display: 'Big Shoulders Display', 'Arial Narrow', sans-serif;
    --body: 'Atkinson Hyperlegible', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --tier: #6fd3a5;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
    margin: 0;
    background: linear-gradient(180deg, #0b1a1f 0%, var(--bg) 420px);
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--body);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: clip;
}

button { font: inherit; color: inherit; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--water); outline-offset: 2px; }

/* tier colours: the level gets warmer as it gets harder */
[data-tier="easy"] { --tier: #6fd3a5; }
[data-tier="medium"] { --tier: #6ec3f0; }
[data-tier="hard"] { --tier: #e7c35f; }
[data-tier="expert"] { --tier: #f39a5b; }
[data-tier="master"] { --tier: #ef6f7a; }
[data-tier="grandmaster"] { --tier: #ee6fc0; }
[data-tier="legend"] { --tier: #c792ff; }
[data-tier="endless"] { --tier: #eef4f5; }

.fr-app {
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px 16px 56px;
}

/* ------------------------------------------------------------ heading + HUD */
.fr-head h1 {
    font-family: var(--display);
    font-weight: 800;
    font-size: clamp(2rem, 5vw, 2.75rem);
    line-height: 1;
    margin: 0;
    letter-spacing: 0.01em;
}
.fr-lede { color: var(--muted); max-width: 64ch; margin: 6px 0 0; font-size: 0.98rem; }

.fr-hud {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin: 14px 0 12px;
    padding: 8px 10px 8px 16px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.fr-level { display: flex; align-items: baseline; gap: 8px; }
.fr-level-label { color: var(--muted); font-size: 0.9rem; }
.fr-level-num { font-family: var(--display); font-weight: 800; font-size: 2.3rem; line-height: 1; color: var(--brass); font-variant-numeric: tabular-nums; }
.fr-tier { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.fr-tier-name { color: var(--tier); font-weight: 700; font-size: 0.95rem; }
.fr-dots { list-style: none; display: flex; gap: 6px; margin: 0; padding: 0; }
.fr-dots li { width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid rgba(232, 242, 243, 0.35); }
.fr-dots li.done { background: var(--tier); border-color: var(--tier); }
.fr-dots li.now { border-color: var(--brass); box-shadow: 0 0 0 2px rgba(216, 180, 95, 0.35); }
.fr-hud-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.fr-streak { display: inline-flex; align-items: center; gap: 6px; padding: 0 8px; color: var(--muted); }
.fr-streak i { color: #f39a5b; }
.fr-streak b { font-size: 1.1rem; color: var(--text); font-variant-numeric: tabular-nums; }

.fr-icon-btn {
    min-height: 44px;
    min-width: 44px;
    padding: 0 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    font-weight: 700;
}
.fr-icon-btn:hover { background: rgba(255, 255, 255, 0.08); }
.fr-sound[aria-pressed="false"] { color: var(--muted); }

/* ------------------------------------------------------------ layout
   Phone: one column in source order. Desktop: the board on the left at full height,
   everything you read on the right. */
.fr-app { display: grid; grid-template-columns: minmax(0, 1fr); row-gap: 12px; }
.fr-head, .fr-hud, .fr-promptbox, .fr-stage, .fr-new, .fr-side, .fr-about { min-width: 0; }
.fr-hud { margin: 0; }
@media (min-width: 980px) {
    .fr-app {
        grid-template-columns: minmax(0, 1fr) 380px;
        grid-template-rows: auto auto auto auto 1fr auto;
        grid-template-areas: "stage head" "stage hud" "stage prompt" "stage new" "stage side" "about about";
        column-gap: 20px;
        align-items: start;
    }
    .fr-head { grid-area: head; }
    .fr-hud { grid-area: hud; }
    .fr-promptbox { grid-area: prompt; }
    .fr-stage { grid-area: stage; }
    .fr-side { grid-area: side; }
    .fr-new { grid-area: new; }
    .fr-about { grid-area: about; }
    .fr-stage .fr-board-frame { width: min(100%, calc((100vh - var(--tt-topnav-h) - 128px) * var(--ar, 0.76))); }
    @supports (height: 100svh) {
        .fr-stage .fr-board-frame { width: min(100%, calc((100svh - var(--tt-topnav-h) - 128px) * var(--ar, 0.76))); }
    }
}

.fr-stage {
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 10px 10px 4px;
}
.fr-promptbox {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 12px 14px;
}

/* ------------------------------------------------------------ prompt row */
.fr-prompt {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
    min-height: 48px;
}
.fr-prompt-copy { flex: 1 1 240px; min-width: 0; }
.fr-prompt-text { margin: 0; font-size: 1.1rem; font-weight: 700; }
.fr-prompt-sub { margin: 2px 0 0; color: var(--muted); font-size: 0.92rem; }
.fr-prompt-sub:empty { display: none; }
.fr-prompt[data-phase="result"] .fr-prompt-text { font-family: var(--display); font-weight: 800; font-size: 1.65rem; line-height: 1.1; }
.fr-prompt[data-phase="result"][data-result="won"] .fr-prompt-text { color: var(--go); }
.fr-prompt[data-phase="result"][data-result="lost"] .fr-prompt-text { color: var(--stop); }
.fr-clock { margin: 2px 0 0; color: var(--water); font-variant-numeric: tabular-nums; font-weight: 700; }
.fr-timer { display: flex; align-items: center; gap: 10px; margin-top: 8px; font-variant-numeric: tabular-nums; }
.fr-timer-track { flex: 1; height: 8px; border-radius: 4px; background: rgba(255, 255, 255, 0.08); overflow: hidden; }
.fr-timer-track i { display: block; height: 100%; background: var(--brass); transform-origin: left center; }
.fr-timer.low .fr-timer-track i { background: var(--stop); }
.fr-timer.low span { color: var(--stop); font-weight: 700; }
.fr-prompt-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.fr-btn {
    min-height: 44px;
    padding: 0 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    font-weight: 700;
    font-size: 0.98rem;
    cursor: pointer;
    white-space: nowrap;
}
.fr-btn:hover { background: rgba(255, 255, 255, 0.09); }
.fr-btn.primary { background: var(--water); border-color: var(--water); color: var(--ink); }
.fr-btn.primary:hover { background: #6fd8f6; }
.fr-btn-small { font-size: 0.9rem; padding: 0 14px; }

.fr-new {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 6px 10px;
    margin: 0;
    padding: 10px 14px;
    border-left: 3px solid var(--brass);
    border-radius: 8px;
    background: rgba(216, 180, 95, 0.08);
    font-size: 0.95rem;
}
.fr-chip {
    display: inline-block;
    padding: 1px 9px;
    border-radius: 999px;
    background: var(--brass);
    color: var(--ink);
    font-size: 0.74rem;
    font-weight: 700;
    white-space: nowrap;
}

/* ------------------------------------------------------------ the board */
.fr-board-frame {
    position: relative;
    margin: 0 auto;
    width: 100%;
    min-width: min(100%, 300px);
    padding-bottom: 74px;
}
.fr-board { display: block; width: 100%; height: auto; aspect-ratio: var(--ar, 0.76); overflow: visible; touch-action: manipulation; }
.fr-picks { position: absolute; left: 0; right: 0; bottom: 0; height: 74px; }
.fr-pick {
    position: absolute;
    top: 4px;
    width: 52px;
    min-height: 48px;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--panel);
    cursor: pointer;
}
.fr-pick:not(:disabled):hover { border-color: var(--water); }
.fr-pick:disabled { cursor: default; }
.fr-pick-letter { font-family: var(--display); font-weight: 800; font-size: 1.6rem; line-height: 1; }
.fr-pick-note {
    position: absolute;
    top: calc(100% + 3px);
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.72rem;
    color: var(--muted);
    white-space: nowrap;
}
.fr-pick.picked { border-color: var(--brass); box-shadow: 0 0 0 2px var(--brass); }
.fr-pick.picked .fr-pick-note { color: var(--brass); }
.fr-pick.won { background: var(--go); border-color: var(--go); color: var(--ink); box-shadow: none; }
.fr-pick.won .fr-pick-note { color: var(--go); font-weight: 700; }
.fr-pick.lost { border-color: var(--stop); color: var(--stop); box-shadow: 0 0 0 2px var(--stop); }
.fr-pick.lost .fr-pick-note { color: var(--stop); }

.fr-board .grid-line { fill: none; stroke: rgba(140, 200, 210, 0.07); stroke-width: 0.6; }
.fr-board .pipes-case path,
.fr-board .pipes-body path,
.fr-board .pipes-chan path,
.fr-board .water path { fill: none; stroke-linejoin: round; }
.fr-board .pipes-case path { stroke: #2e170a; stroke-width: 10.4; stroke-linecap: round; }
.fr-board .pipes-body path { stroke: var(--copper); stroke-width: 8.2; stroke-linecap: round; }
.fr-board .pipes-chan path { stroke: #8a4b27; stroke-width: 4.4; stroke-linecap: round; }
.fr-board .water path { stroke: var(--water); stroke-linecap: butt; visibility: hidden; }
.fr-board .water path.feed { visibility: hidden; }
@media (min-width: 768px) {
    .fr-board .water { filter: drop-shadow(0 0 2.5px rgba(60, 200, 240, 0.6)); }
}
.fr-board .hub { fill: var(--brass); stroke: #6e5420; stroke-width: 1.2; }
.fr-board .hub-bolt { fill: #8a6a2a; }
.fr-board .collar { fill: #b88a45; stroke: #5e4219; stroke-width: 1; }
.fr-board .valve-body { fill: #1b2a2f; stroke: #c9d6d9; stroke-width: 1.2; }
.fr-board .valve.closed .valve-handle { fill: var(--stop); }
.fr-board .valve.open .valve-handle { fill: var(--go); }
.fr-board .drain-body { fill: #23343a; stroke: #a9bcc1; stroke-width: 1.2; stroke-linejoin: round; }
.fr-board .drain-drip { fill: #5d7a82; }
.fr-board .drain.active .drain-body { stroke: var(--water); fill: #18414e; }
.fr-board .drain.active .drain-drip { fill: var(--water); }
/* catches: a dead end and a pipe that stops short both end in the same flat cap */
.fr-board .end-cap { fill: #3a4a50; stroke: #c9d6d9; stroke-width: 1; }
.fr-board .leak-case { stroke: #2e170a; stroke-width: 7; fill: none; }
.fr-board .leak-body { stroke: var(--copper); stroke-width: 5; fill: none; }
.fr-board .leak-drip { fill: #5d7a82; }
.fr-board .leak-drip.active { fill: var(--water); }
.fr-board .basin-water { opacity: 0.9; }
.fr-board .tap-rim { fill: none; stroke: var(--brass); stroke-width: 2.6; }
.fr-board .tap-spoke { fill: var(--brass); }
.fr-board .tap-hub { fill: #7a5a22; }
.fr-board .tap-wheel { transform-box: fill-box; transform-origin: center; }
.fr-board.opening .tap-wheel,
.fr-board.flowing .tap-wheel { animation: frTurn 0.42s ease-out forwards; }
@keyframes frTurn { from { transform: rotate(0deg); } to { transform: rotate(-135deg); } }

.fr-board .tank { outline: none; }
.fr-board .tank-hit { fill: transparent; }
.fr-board.can-pick .tank { cursor: pointer; }
.fr-board .tank-glass { fill: url(#frGlass); stroke: rgba(200, 235, 242, 0.55); stroke-width: 1.3; transition: stroke 0.15s; }
.fr-board .tank-water { fill: url(#frWater); }
.fr-board .tank-surface { fill: #b8f0ff; opacity: 0.85; }
.fr-board .tank-stream { fill: var(--water); }
.fr-board .tank-mark { stroke: rgba(220, 240, 245, 0.55); stroke-width: 1; }
.fr-board .tank-cap { fill: #31474e; stroke: #8fa7ad; stroke-width: 0.8; }
.fr-board.can-pick .tank:hover .tank-glass,
.fr-board .tank:focus-visible .tank-glass { stroke: var(--water); stroke-width: 2.2; }
.fr-board .tank.picked .tank-glass { stroke: var(--brass); stroke-width: 2.6; }
.fr-board .tank.won .tank-glass { stroke: var(--go); stroke-width: 3; }
.fr-board .tank.lost .tank-glass { stroke: var(--stop); stroke-width: 2.6; }
.fr-board .tank.won .tank-cap { fill: var(--go); stroke: var(--go); }

/* ------------------------------------------------------------ side cards */
.fr-side { display: grid; gap: 14px; min-width: 0; }
.fr-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px 16px 16px;
    min-width: 0;
}
.fr-card h2 { font-family: var(--display); font-weight: 800; font-size: 1.4rem; line-height: 1.15; margin: 0 0 10px; letter-spacing: 0.01em; }
.fr-why { border-color: rgba(58, 210, 145, 0.35); }
.fr-why-intro { margin: 0 0 10px; color: var(--muted); font-size: 0.9rem; }

.fr-rules { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.fr-rules li { display: grid; grid-template-columns: 20px 1fr; column-gap: 10px; row-gap: 4px; font-size: 0.95rem; line-height: 1.42; }
.fr-rules li i { color: var(--water); margin-top: 4px; text-align: center; }
.fr-rules li .fr-chip { grid-column: 2; justify-self: start; }
.fr-rules li.is-new span { color: #fff; }

.fr-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 0; }
.fr-stats dt { color: var(--muted); font-size: 0.78rem; line-height: 1.25; }
.fr-stats dd { margin: 2px 0 0; font-family: var(--display); font-weight: 800; font-size: 1.7rem; line-height: 1; font-variant-numeric: tabular-nums; }

.fr-table-wrap { overflow-x: auto; margin: 0 0 12px; }
.fr-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.fr-table th, .fr-table td { padding: 7px 6px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.fr-table thead th { color: var(--muted); font-weight: 400; font-size: 0.76rem; line-height: 1.25; vertical-align: bottom; }
.fr-table th[scope="row"] { font-family: var(--display); font-weight: 800; font-size: 1.35rem; line-height: 1; }
.fr-table th[scope="row"] small { display: block; font-family: var(--body); font-weight: 400; font-size: 0.72rem; color: var(--muted); margin-top: 3px; }
.fr-table th[scope="row"] em { display: block; font-family: var(--body); font-style: normal; font-weight: 700; font-size: 0.72rem; color: var(--brass); margin-top: 2px; }
.fr-table td { white-space: nowrap; }
.fr-table th[scope="row"] em, .fr-table th[scope="row"] small { white-space: nowrap; }
.fr-table td small { display: block; font-size: 0.72rem; color: var(--muted); margin-top: 2px; }
.fr-table tr.win th, .fr-table tr.win td:last-child { color: var(--go); }
.fr-table tr.win td:last-child { font-weight: 700; }
.fr-table tr.pick th { color: var(--stop); }

/* ------------------------------------------------------------ about */
.fr-about { max-width: 72ch; margin: 28px 0 0; }
.fr-about h2 { font-family: var(--display); font-weight: 800; font-size: 1.85rem; margin: 0 0 8px; }
.fr-about h3 { font-family: var(--display); font-weight: 700; font-size: 1.35rem; margin: 22px 0 6px; }
.fr-about p { color: var(--muted); margin: 0 0 10px; }
.fr-tier-list { margin: 0; padding-left: 1.4rem; color: var(--muted); }
.fr-tier-list li { margin: 6px 0; padding-left: 4px; }
.fr-tier-list li b { color: var(--tier); margin-right: 4px; }

/* ------------------------------------------------------------ level picker + toast */
.fr-modal {
    position: fixed;
    inset: 0;
    z-index: calc(var(--tt-z-modal, 1000) + 10);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: rgba(3, 8, 10, 0.74);
}
.fr-modal-box {
    width: min(560px, 100%);
    max-height: calc(100vh - 32px);
    overflow: auto;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 14px 18px 16px;
}
.fr-modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.fr-modal-head h2 { font-family: var(--display); font-weight: 800; font-size: 1.6rem; margin: 0; }
.fr-modal-note { color: var(--muted); font-size: 0.9rem; margin: 4px 0 6px; }
.fr-tier-group { margin: 12px 0 0; }
.fr-tier-group h3 { font-family: var(--display); font-weight: 700; font-size: 1.15rem; margin: 0 0 8px; color: var(--tier); }
.fr-level-row { display: flex; flex-wrap: wrap; gap: 8px; }
.fr-level-row button {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    font-family: var(--display);
    font-weight: 800;
    font-size: 1.3rem;
    cursor: pointer;
}
.fr-level-row button.done { border-color: var(--tier); color: var(--tier); }
.fr-level-row button.current { box-shadow: 0 0 0 2px var(--brass); }
.fr-level-row button:disabled { opacity: 0.32; cursor: not-allowed; }
.fr-modal-foot { margin-top: 16px; display: flex; justify-content: flex-end; }

.fr-toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    transform: translateX(-50%);
    z-index: calc(var(--tt-z-toast, 1100) + 10);
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--text);
    color: var(--ink);
    font-weight: 700;
}
.fr-noscript { max-width: 1180px; margin: 20px auto; padding: 0 16px; color: var(--muted); }

/* ------------------------------------------------------------ phones */
@media (max-width: 600px) {
    /* the whole board has to fit one phone screen: the pick timer runs from the first second */
    .fr-app { padding: 8px 12px 48px; row-gap: 8px; }
    .fr-head h1 { font-size: 1.75rem; }
    .fr-lede { display: none; }
    .fr-hud { flex-wrap: nowrap; padding: 4px 4px 4px 10px; gap: 10px; }
    .fr-level { gap: 5px; }
    .fr-level-label { font-size: 0.8rem; }
    .fr-level-num { font-size: 1.9rem; }
    .fr-tier-name { font-size: 0.84rem; line-height: 1.2; }
    .fr-hud-actions { gap: 4px; }
    .fr-hud-actions .fr-icon-btn { padding: 0 10px; }
    .fr-hud-actions .fr-icon-btn span { display: none; }
    .fr-streak { padding: 0 4px; }
    .fr-streak-label { display: none; }
    .fr-promptbox { padding: 10px 12px; }
    .fr-prompt { min-height: 44px; }
    .fr-board-frame { padding-bottom: 68px; }
    .fr-picks { height: 68px; }
    .fr-stage { padding: 8px 6px 2px; }
    .fr-prompt-text { font-size: 1rem; }
    .fr-prompt[data-phase="result"] .fr-prompt-text { font-size: 1.4rem; }
    .fr-pick { width: 48px; }
}
@media (max-width: 380px) {
    .fr-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .fr-icon-btn span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    .fr-board.opening .tap-wheel, .fr-board.flowing .tap-wheel { animation: none; }
}