:root {
  --ink: #f4efff;
  --muted: #a99ccc;
  --panel: rgba(24, 15, 52, 0.8);
  --edge: rgba(196, 139, 255, 0.28);
  --amber: #ffb547;
  --teal: #2de0c0;
  --krill: #ff7a9c;
  --gem: #ffe066;
  --deep: #c48bff;
  --rare: #2de0c0;
  --school: #6aa8ff;
  --clever: #ff9f5a;
  --plankton: #cfc8de;
  --none: #ff5d73;
  --display: "Fredoka", "Trebuchet MS", system-ui, sans-serif;
  --body: "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: #07041a; }
body { margin: 0; color: var(--ink); font: 16px/1.6 var(--body); background: #07041a; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: var(--teal); }

* { scrollbar-width: thin; scrollbar-color: rgba(196, 139, 255, 0.45) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(196, 139, 255, 0.4); border-radius: 8px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-corner { background: transparent; }

/* ---------- stage ---------- */
.stage { position: relative; height: 100svh; min-height: 560px; overflow: hidden; background: #1a9aac; }
body.playing { overflow: hidden; }
body.playing .stage { position: fixed; inset: 0; height: auto; min-height: 0; z-index: 5; }
body.playing .content, body.playing .foot, body.playing .site-nav { display: none; }

.scene { position: absolute; left: 0; right: 0; top: 0; height: 4200px; will-change: transform; transition: transform 1.5s cubic-bezier(0.5, 0, 0.25, 1); }
.scene .water { position: absolute; inset: 0;
  background: linear-gradient(180deg, #ffd9b0 0, #ffc6a5 7%, #a8e6ea 13%, #2fc4c9 13.1%, #1a9aac 16%, #137a95 20%, #0f4f78 30%, #16285a 45%, #150f3d 70%, #0b0722 88%, #05030f 100%); }
.scene .sun { position: absolute; right: 18%; top: 70px; width: 120px; height: 120px; border-radius: 50%; background: radial-gradient(circle, #fff6d6 0 45%, rgba(255, 214, 140, 0.55) 46%, transparent 70%); }
.scene .rays { position: absolute; left: -10%; right: -10%; top: 13%; height: 14%; background: repeating-linear-gradient(78deg, rgba(255, 255, 255, 0.08) 0 22px, transparent 22px 80px); mask-image: linear-gradient(180deg, #000, transparent); -webkit-mask-image: linear-gradient(180deg, #000, transparent); }
.scene .gull { position: absolute; width: 26px; height: 10px; }
.scene .gull::before, .scene .gull::after { content: ""; position: absolute; top: 0; width: 14px; height: 8px; border-top: 2.5px solid #5b4a7a; border-radius: 50% 50% 0 0; }
.scene .gull::before { left: 0; } .scene .gull::after { right: 0; }
.scene .buoy { position: absolute; left: 22%; width: 60px; height: 70px; animation: rock 4s ease-in-out infinite; transform-origin: 50% 90%; }
.scene .coral { position: absolute; width: 80px; opacity: 0.8; transform-origin: bottom center; animation: sway 7s ease-in-out infinite; }
.scene .fish { position: absolute; animation: swim-left linear infinite; }
.scene .jelly { position: absolute; animation: drift 9s ease-in-out infinite; }
.scene .mark { position: absolute; font: 600 12px/1.3 var(--body); letter-spacing: 0.03em; color: rgba(232, 220, 255, 0.6); white-space: nowrap; transition: opacity 0.6s; }
.scene .mark.l { left: 66px; }
.scene .mark.r { right: 16px; text-align: right; }
.scene .mark.zone { font: 600 13px var(--display); letter-spacing: 0.12em; color: var(--gem); }
body:not(.playing) .scene .mark { opacity: 0; }
.scene .floor { position: absolute; left: 0; right: 0; height: 120px; background: radial-gradient(70% 100% at 50% 100%, #2a1240 0, transparent 70%); }

@keyframes sway { 0%, 100% { transform: rotate(-2deg); } 50% { transform: rotate(2.5deg); } }
@keyframes rock { 0%, 100% { transform: rotate(-4deg); } 50% { transform: rotate(4deg); } }
@keyframes swim-left { from { transform: translateX(calc(100vw + 120px)); } to { transform: translateX(-140px); } }
@keyframes drift { 0%, 100% { margin-top: -10px; } 50% { margin-top: 10px; } }

.snow { position: absolute; inset: 0; pointer-events: none; opacity: 0.45;
  background-image: radial-gradient(2px 2px at 25% 35%, #e6d9ff 50%, transparent 51%), radial-gradient(1.5px 1.5px at 65% 55%, #bff7ec 50%, transparent 51%), radial-gradient(1px 1px at 45% 85%, #fff 50%, transparent 51%), radial-gradient(2px 2px at 80% 15%, #ffd0dc 50%, transparent 51%), radial-gradient(1px 1px at 8% 65%, #fff 50%, transparent 51%);
  background-size: 240px 280px; animation: specks 22s linear infinite; }
@keyframes specks { from { background-position: 0 0; } to { background-position: 40px 280px; } }

.ruler { position: absolute; top: 0; bottom: 0; left: 0; width: 58px; pointer-events: none; }
.ruler-track { position: absolute; left: 8px; top: 0; height: 4200px; width: 50px; border-left: 2px dashed rgba(220, 205, 255, 0.35); transition: transform 1.5s cubic-bezier(0.5, 0, 0.25, 1); will-change: transform; }
.ruler-track i { position: absolute; left: 0; width: 7px; border-top: 2px solid rgba(220, 205, 255, 0.35); }
.ruler-track i.big { width: 14px; border-color: rgba(255, 224, 102, 0.7); }
.ruler-track span { position: absolute; left: 18px; font: 700 10px var(--body); color: rgba(240, 232, 255, 0.7); transform: translateY(-50%); white-space: nowrap; }
.you { position: absolute; left: 6px; top: 46%; font: 600 10px var(--display); letter-spacing: 0.1em; color: var(--krill); transform: translateY(-50%); }
.you::before { content: ""; display: inline-block; width: 18px; height: 3px; border-radius: 2px; background: var(--krill); vertical-align: middle; margin-right: 4px; }

.diver { position: absolute; right: 14%; top: 46%; width: 64px; height: 40px; transform: translateY(-50%); animation: paddle 2.6s ease-in-out infinite; filter: drop-shadow(0 0 12px var(--glow, rgba(255, 122, 156, 0.5))); }
@keyframes paddle { 0%, 100% { margin-top: -5px; rotate: -3deg; } 50% { margin-top: 5px; rotate: 3deg; } }
.diver.sinking { animation: paddle 0.7s ease-in-out infinite; }

/* ---------- hud ---------- */
.hud { position: absolute; top: 12px; left: 64px; right: 12px; display: flex; justify-content: center; align-items: center; gap: 10px; z-index: 3; pointer-events: none; flex-wrap: wrap; }
.panel { display: flex; align-items: baseline; gap: 8px; background: var(--panel); border: 1px solid var(--edge); border-radius: 999px; padding: 5px 14px; backdrop-filter: blur(6px); }
.panel small, .dots-wrap small { font: 600 10px var(--display); letter-spacing: 0.18em; color: var(--muted); }
.panel b { font: 600 19px var(--display); color: var(--teal); }
.panel b.pink { color: var(--amber); }
.dots-wrap { order: 3; flex-basis: 100%; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.dots { display: flex; gap: 6px; justify-content: center; }
.dots i { width: 15px; height: 15px; border-radius: 50%; background: rgba(24, 15, 52, 0.75); border: 1.5px solid var(--edge); }
.dots i.now { background: transparent; border: 2px solid var(--amber); box-shadow: 0 0 10px rgba(255, 181, 71, 0.7); }
.dots i.t-gem { background: var(--gem); } .dots i.t-deep { background: var(--deep); } .dots i.t-rare { background: var(--rare); }
.dots i.t-school { background: var(--school); } .dots i.t-clever { background: var(--clever); } .dots i.t-plankton { background: var(--plankton); } .dots i.t-none { background: var(--none); }

.menu-btn { position: absolute; top: 12px; right: 12px; z-index: 6; width: 42px; height: 42px; border-radius: 50%; background: var(--panel); border: 1px solid var(--edge); display: grid; place-content: center; gap: 4px; backdrop-filter: blur(6px); }
.menu-btn span { display: block; width: 18px; height: 2.5px; border-radius: 2px; background: var(--ink); }
.menu-btn span:nth-child(2) { width: 12px; justify-self: end; }
.menu { position: absolute; top: 60px; right: 12px; z-index: 6; display: grid; gap: 2px; background: rgba(24, 15, 52, 0.94); border: 1px solid var(--edge); border-radius: 16px; padding: 8px; min-width: 210px; backdrop-filter: blur(8px); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45); }
.menu[hidden] { display: none; }
.menu button, .menu a { text-align: left; background: none; border: 0; padding: 10px 14px; border-radius: 10px; color: var(--ink); text-decoration: none; font: 600 15px var(--body); }
.menu button:hover, .menu a:hover { background: rgba(196, 139, 255, 0.14); }
.menu hr { border: 0; border-top: 1px solid var(--edge); margin: 4px 6px; }

/* ---------- screens ---------- */
.app { position: absolute; inset: 0; z-index: 2; display: flex; flex-direction: column; pointer-events: none; }
.app > * { pointer-events: auto; }

.home { margin: auto; text-align: center; padding: 110px 20px 40px 70px; max-width: 620px; }
.title { margin: 0; font: 700 clamp(40px, 11vw, 70px)/0.95 var(--display); letter-spacing: 0.02em; color: #fff; text-shadow: 0 4px 0 #7a3d8f, 0 10px 30px rgba(40, 10, 70, 0.5); }
.title span { display: block; margin-top: 4px; font-size: 0.58em; letter-spacing: 0.22em; color: var(--amber); text-shadow: 0 3px 0 #7a3d1f; }
.sub { margin: 14px 0 0; font: 600 14px var(--display); letter-spacing: 0.3em; color: #fff7ee; }
.tag { margin: 10px 0 24px; font: 600 15px var(--body); color: #fff2e6; }
.go { display: inline-block; font: 600 19px var(--display); letter-spacing: 0.06em; padding: 15px 32px; border-radius: 999px; border: 0; color: #2b1300; background: linear-gradient(180deg, #ffd27a, #ffa53a); box-shadow: 0 6px 0 #b4621a, 0 10px 28px rgba(255, 160, 60, 0.35); }
.go:active { transform: translateY(3px); box-shadow: 0 3px 0 #b4621a, 0 8px 20px rgba(255, 160, 60, 0.3); }
.go.ghosty { background: var(--panel); color: var(--ink); border: 1px solid var(--edge); box-shadow: none; font-size: 14px; padding: 11px 18px; backdrop-filter: blur(6px); }
.go.ghosty:hover { border-color: var(--amber); }
a.go { text-decoration: none; }
.row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.small { font: 700 12px var(--body); color: #fff2e6; letter-spacing: 0.08em; margin-top: 14px; }
.stats { display: flex; gap: 6px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }
.stats div { background: var(--panel); border: 1px solid var(--edge); border-radius: 14px; padding: 6px 14px; min-width: 76px; }
.stats b { display: block; font: 600 19px var(--display); color: var(--teal); }
.stats span { font: 700 9px var(--body); letter-spacing: 0.16em; color: var(--muted); }
button.stats { background: none; border: 0; padding: 0; margin-left: auto; margin-right: auto; color: inherit; }
button.stats:hover div { border-color: var(--teal); }

.prompt-card { margin: 112px 12px 0 66px; background: rgba(24, 15, 52, 0.82); border: 1px solid var(--edge); border-radius: 22px; padding: 18px 20px; backdrop-filter: blur(6px); max-width: 640px; box-shadow: 0 12px 34px rgba(0, 0, 0, 0.3); }
.prompt-card small { font: 600 12px var(--display); letter-spacing: 0.2em; color: var(--amber); }
.prompt-card h2 { margin: 6px 0 8px; font: 600 clamp(23px, 5.4vw, 32px)/1.2 var(--display); }
.prompt-card p { margin: 0; font: 600 13px var(--body); color: var(--muted); }

.bar { margin-top: auto; display: flex; align-items: center; gap: 10px; padding: 12px 12px calc(12px + env(safe-area-inset-bottom)) 66px; background: linear-gradient(180deg, transparent, rgba(7, 4, 26, 0.92) 45%); }
.clock { position: relative; width: 60px; height: 60px; flex: none; }
.clock svg { width: 60px; height: 60px; transform: rotate(-90deg) scaleY(-1); }
.clock circle { fill: rgba(24, 15, 52, 0.92); stroke: rgba(196, 139, 255, 0.22); stroke-width: 5; }
.clock circle.left { fill: none; stroke: var(--teal); stroke-linecap: round; transition: stroke-dashoffset 0.1s linear; }
.clock b { position: absolute; inset: 0; display: grid; place-items: center; font: 600 20px var(--display); color: var(--teal); }
.clock.hurry circle.left, .clock.hurry b { stroke: var(--krill); color: var(--krill); }
.clock.paused b { color: var(--muted); }
.clock.paused circle.left { stroke: var(--muted); }
.bar form { flex: 1; display: flex; gap: 0; min-width: 0; max-width: 640px; background: rgba(24, 15, 52, 0.95); border: 2px solid var(--edge); border-radius: 999px; padding: 4px; }
.bar form:focus-within { border-color: var(--amber); }
.bar input { flex: 1; min-width: 0; font: 700 18px var(--body); padding: 11px 16px; border: 0; background: transparent; color: var(--ink); outline: none; }
.bar .dive { font: 600 17px var(--display); letter-spacing: 0.1em; padding: 0 22px; border-radius: 999px; border: 0; background: linear-gradient(180deg, #ffd27a, #ffa53a); color: #2b1300; }
.bar .dive:disabled { opacity: 0.55; }
.bar input.miss { animation: miss 0.32s ease-in-out; }
.bar form:has(input.miss) { border-color: var(--none); }
@keyframes miss { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }
.err { position: absolute; bottom: 92px; left: 0; right: 0; text-align: center; font: 700 14px var(--body); color: var(--none); }
.err:not(:empty) { left: calc(50% + 27px); right: auto; transform: translateX(-50%); width: max-content; max-width: calc(100% - 90px); margin: 0; padding: 8px 14px; border-radius: 14px; background: rgba(24, 15, 52, 0.95); border: 1px solid rgba(255, 93, 115, 0.5); color: #ff9dab; }

.verdict { margin: auto 12px 26px 66px; align-self: center; text-align: center; padding: 26px 24px 28px; max-width: 560px; width: calc(100% - 78px); background: rgba(24, 15, 52, 0.72); border: 1px solid var(--edge); border-radius: 26px; backdrop-filter: blur(6px); }
.verdict .label { font: 700 clamp(34px, 9vw, 54px)/1.05 var(--display); letter-spacing: 0.03em; text-shadow: 0 0 26px currentColor; }
.verdict .said { font: 700 19px var(--body); margin-top: 12px; }
.verdict .pts { font: 600 19px var(--display); margin-top: 8px; }
.verdict .pts em { font-style: normal; color: var(--amber); }
.verdict .note { font: 600 14px var(--body); color: var(--muted); margin-top: 8px; }
.verdict .fact { margin: 14px auto 0; max-width: 460px; background: rgba(255, 224, 102, 0.08); border: 1px solid rgba(255, 224, 102, 0.45); border-radius: 14px; padding: 10px 14px; font-size: 15px; color: #fff3c2; }
.verdict .go { margin-top: 24px; }

.c-gem { color: var(--gem); } .c-deep { color: var(--deep); } .c-rare { color: var(--rare); } .c-school { color: var(--school); }
.c-clever { color: var(--clever); } .c-plankton { color: var(--plankton); } .c-none { color: var(--none); }

.sheet { position: absolute; inset: 0; overflow-y: auto; z-index: 4; padding: 70px 12px 40px 66px; background: linear-gradient(180deg, rgba(7, 4, 26, 0.25), rgba(7, 4, 26, 0.9) 30%); }
.sheet .inner { max-width: 660px; margin: 0 auto; }
.summary { text-align: center; padding: 26px 0 10px; }
.summary small { font: 600 12px var(--display); letter-spacing: 0.24em; color: var(--muted); }
.summary .depth { font: 700 clamp(52px, 15vw, 86px)/1 var(--display); color: #fff; text-shadow: 0 5px 0 #7a3d8f; margin: 10px 0 6px; }
.summary .zone { font: 600 16px var(--display); letter-spacing: 0.18em; color: var(--gem); }
.summary .score { font: 700 16px var(--body); margin-top: 6px; }
.summary .squares { font-size: 24px; letter-spacing: 4px; margin: 12px 0 0; }
.summary .beat { font: 600 14px var(--body); color: var(--muted); margin-top: 6px; }
.box { background: var(--panel); border: 1px solid var(--edge); border-radius: 16px; margin-top: 10px; }
.box > button { width: 100%; text-align: left; background: none; border: 0; padding: 12px 16px; display: flex; justify-content: space-between; gap: 10px; align-items: center; }
.box .q { font-size: 14px; color: var(--muted); }
.box .a { font: 600 16px var(--display); overflow-wrap: anywhere; }
.box .chip { flex: none; }
.box .more { padding: 0 16px 14px; font-size: 15px; }
.box .more h4 { margin: 12px 0 4px; font: 600 13px var(--display); letter-spacing: 0.1em; }
.box .more p { margin: 0; color: #e2d9f7; }
.box .gemfact { color: #fff3c2; }
.check { display: flex; gap: 6px; margin-top: 12px; }
.check input { flex: 1; min-width: 0; font: 600 15px var(--body); padding: 9px 14px; border-radius: 999px; background: rgba(7, 4, 26, 0.9); color: var(--ink); border: 1px solid var(--edge); }
.check button { border: 0; border-radius: 999px; padding: 0 16px; background: var(--teal); color: #04201b; font: 600 14px var(--display); }
.check-out { font: 600 14px var(--body); margin-top: 6px; min-height: 1.2em; }

.chip { display: inline-block; padding: 2px 10px; border-radius: 8px; font: 600 12px var(--display); letter-spacing: 0.02em; color: #160b2b; white-space: nowrap; }
.t-gem { background: var(--gem); } .t-deep { background: var(--deep); } .t-rare { background: var(--rare); } .t-school { background: var(--school); }
.t-clever { background: var(--clever); } .t-plankton { background: var(--plankton); } .t-none { background: var(--none); color: #fff; }

.list { display: grid; gap: 6px; margin-top: 12px; }
.list button { display: flex; justify-content: space-between; background: var(--panel); border: 1px solid var(--edge); border-radius: 14px; padding: 12px 16px; font: 600 15px var(--display); }
.list .date { color: var(--muted); font: 600 13px var(--body); margin-left: 8px; }
.modal-text { max-width: 560px; margin: 0 auto; font-size: 15px; }
.modal-text h2 { font: 600 24px var(--display); letter-spacing: 0.08em; text-align: center; }

.toast { position: fixed; left: 50%; bottom: 104px; transform: translateX(-50%); background: var(--amber); color: #2b1300; padding: 10px 20px; border-radius: 999px; font: 600 15px var(--display); z-index: 40; max-width: calc(100vw - 24px); text-align: center; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35); }

/* ---------- modal: tour, options, record, themes ---------- */
.modal-back { position: fixed; inset: 0; z-index: 30; display: grid; place-items: center; padding: 12px; background: rgba(7, 4, 26, 0.66); backdrop-filter: blur(4px); overflow-y: auto; }
.modal-back.in-dive { bottom: 92px; align-items: start; }
.modal { position: relative; width: min(500px, 100%); max-height: calc(100svh - 24px); overflow-y: auto; background: linear-gradient(180deg, #1f1442, #140c30); border: 1px solid rgba(196, 139, 255, 0.4); border-radius: 24px; padding: 16px 20px 20px; box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55); outline: none; }
.modal-back.in-dive .modal { max-height: calc(100svh - 116px); }
.modal h2 { margin: 6px 0 8px; font: 600 22px/1.2 var(--display); letter-spacing: 0.06em; text-align: center; color: #fff; }
.modal h3 { margin: 18px 0 8px; font: 600 12px var(--display); letter-spacing: 0.2em; color: var(--muted); }
.modal-head { display: flex; justify-content: space-between; align-items: center; }
.modal-head small { font: 600 12px var(--display); letter-spacing: 0.2em; color: var(--amber); }
.modal .x { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--edge); background: rgba(255, 255, 255, 0.05); font: 700 20px/1 var(--body); color: var(--ink); }
.modal .x:hover { border-color: var(--amber); }
.modal :focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.modal .fine { font: 600 12.5px/1.5 var(--body); color: var(--muted); margin: 14px 0 0; text-align: center; }

.tut-art { margin: 12px 0 6px; border-radius: 18px; padding: 14px; background: linear-gradient(180deg, #1a9aac, #0f4f78 55%, #16285a); border: 1px solid rgba(168, 230, 234, 0.35); position: relative; overflow: hidden; }
.tut-art.mock small { font: 600 11px var(--display); letter-spacing: 0.2em; color: var(--gem); }
.tut-art.mock > b { display: block; margin: 4px 0 12px; font: 600 20px/1.25 var(--display); }
.mock-bar { display: flex; gap: 8px; align-items: center; }
.mock-clock { flex: none; width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; border: 4px solid var(--teal); font: 600 15px var(--display); color: var(--teal); background: rgba(24, 15, 52, 0.9); }
.mock-input { flex: 1; min-width: 0; padding: 9px 14px; border-radius: 999px; background: rgba(24, 15, 52, 0.92); border: 2px solid var(--amber); font: 700 15px var(--body); white-space: nowrap; overflow: hidden; }
.mock-input i { display: inline-block; width: 2px; height: 1em; margin-left: 2px; vertical-align: -2px; background: var(--amber); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.mock-dive { flex: none; padding: 9px 14px; border-radius: 999px; background: var(--amber); color: #2b1300; font: 600 13px var(--display); letter-spacing: 0.1em; }
.ladder { display: grid; gap: 8px; }
.rung { display: grid; grid-template-columns: minmax(0, 1.2fr) auto minmax(40px, 1fr) 36px; gap: 8px; align-items: center; font: 700 14px var(--body); }
.rung .said { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rung b { text-align: right; font-family: var(--display); color: var(--gem); }
.meter { display: block; height: 9px; border-radius: 5px; background: rgba(24, 15, 52, 0.7); overflow: hidden; }
.meter i { display: block; height: 100%; border-radius: 5px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.pair .card { background: rgba(24, 15, 52, 0.85); border: 1px solid var(--edge); border-radius: 14px; padding: 10px; display: grid; gap: 6px; align-content: start; }
.pair .card.gem { border-color: rgba(255, 224, 102, 0.6); }
.pair .card.clever { border-color: rgba(255, 159, 90, 0.6); }
.pair .card .chip { justify-self: start; white-space: normal; }
.pair .card b { font: 600 17px var(--display); }
.pair .card small { font-size: 13px; line-height: 1.45; color: #e2d9f7; }
.tut-text { margin: 0; font-size: 15px; line-height: 1.55; color: #e9e1fb; text-align: center; }
.tut-dots { display: flex; justify-content: center; gap: 7px; margin: 14px 0 12px; }
.tut-dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(196, 139, 255, 0.3); }
.tut-dots i.on { background: var(--amber); box-shadow: 0 0 8px rgba(255, 181, 71, 0.7); }
.tut-nav { display: grid; grid-template-columns: 1fr 1.6fr; gap: 8px; }
.tut-nav .go { width: 100%; padding: 13px 10px; font-size: 16px; }
.tut-nav .go.ghosty { font-size: 14px; }

.opt { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid rgba(196, 139, 255, 0.15); cursor: pointer; }
.opt b { display: block; font: 600 15px var(--display); }
.opt small { display: block; font-size: 13px; line-height: 1.4; color: var(--muted); margin-top: 2px; }
.opt input { appearance: none; -webkit-appearance: none; flex: none; width: 48px; height: 28px; border-radius: 14px; background: rgba(196, 139, 255, 0.2); border: 1px solid var(--edge); position: relative; cursor: pointer; margin: 0; transition: background 0.2s; }
.opt input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #e2d9f7; transition: transform 0.2s; }
.opt input:checked { background: var(--teal); border-color: var(--teal); }
.opt input:checked::after { transform: translateX(20px); background: #0b2a24; }
.chips-preview { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 0 4px; }
.skins { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.skin { display: grid; justify-items: center; gap: 4px; padding: 10px 6px; border-radius: 16px; background: rgba(24, 15, 52, 0.85); border: 1px solid var(--edge); text-align: center; }
.skin .skin-art { display: grid; place-items: center; height: 44px; }
.skin b { font: 600 13px var(--display); }
.skin small { font: 700 10px/1.35 var(--body); color: var(--muted); }
.skin.on { border-color: var(--amber); box-shadow: 0 0 14px rgba(255, 181, 71, 0.35); }
.skin.on small { color: var(--amber); }
.skin.locked .skin-art { filter: grayscale(1) brightness(1.5) opacity(0.4); }

.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; border-radius: 999px; background: rgba(24, 15, 52, 0.85); border: 1px solid var(--edge); }
.tabs button { border: 0; border-radius: 999px; padding: 9px 6px; background: none; font: 600 14px var(--display); letter-spacing: 0.08em; color: var(--muted); }
.tabs button.on { background: var(--amber); color: #2b1300; }
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: 12px; }
.tiles div { background: rgba(24, 15, 52, 0.85); border: 1px solid var(--edge); border-radius: 14px; padding: 8px 6px; text-align: center; }
.tiles b { display: block; font: 600 19px var(--display); color: var(--teal); }
.tiles span { font: 700 9px var(--body); letter-spacing: 0.15em; color: var(--muted); }
.dist { display: grid; gap: 6px; }
.dist-row { display: grid; grid-template-columns: 136px minmax(30px, 1fr) 30px 38px; gap: 8px; align-items: center; font: 700 13px var(--body); }
.dist-row .chip { justify-self: start; max-width: 100%; overflow: hidden; text-overflow: ellipsis; }
.dist-row b { text-align: right; }
.dist-row small { color: var(--muted); text-align: right; }
.history ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.history li { display: grid; grid-template-columns: minmax(0, 1fr) auto 66px; gap: 8px; align-items: center; padding: 7px 10px; border-radius: 10px; background: rgba(24, 15, 52, 0.75); font: 700 13px var(--body); }
.history .h-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #e2d9f7; }
.history .h-sq { font-size: 12px; letter-spacing: 1px; }
.history b { text-align: right; color: var(--teal); }
.empty { margin: 16px 0 4px; padding: 16px; border-radius: 16px; border: 1px dashed var(--edge); font-size: 15px; color: #e2d9f7; text-align: center; }
.row.export { margin-top: 16px; }
.pack { margin-top: 14px; }
.pack h3 { margin: 0 0 8px; color: #fff; }
.pack h3 small { font-weight: 600; color: var(--muted); letter-spacing: 0.05em; }
.chapters { display: flex; flex-wrap: wrap; gap: 6px; }
.chapters button { min-width: 44px; height: 40px; padding: 0 10px; border-radius: 12px; border: 1px solid var(--edge); background: rgba(24, 15, 52, 0.85); font: 600 15px var(--display); }
.chapters button:hover { border-color: var(--amber); }
.chapters button.done { color: var(--teal); border-color: rgba(45, 224, 192, 0.5); }

/* ---------- colour-blind friendly tiers (Okabe–Ito) ---------- */
.cb { --gem: #f0e442; --deep: #cc79a7; --rare: #009e73; --school: #56b4e9; --clever: #e69f00; --plankton: #bbbbbb; --none: #d55e00; }
.cb .dots i { display: grid; place-items: center; font: 800 8px/1 var(--body); color: #160b2b; }
.cb .dots i.t-gem::after { content: "★"; } .cb .dots i.t-deep::after { content: "D"; } .cb .dots i.t-rare::after { content: "R"; }
.cb .dots i.t-school::after { content: "S"; } .cb .dots i.t-clever::after { content: "C"; } .cb .dots i.t-plankton::after { content: "P"; } .cb .dots i.t-none::after { content: "×"; color: #fff; }

/* ---------- reduced motion (setting or device) ---------- */
.reduce-motion .scene, .reduce-motion .ruler-track, .reduce-motion .opt input, .reduce-motion .opt input::after { transition: none; }
.reduce-motion .snow, .reduce-motion .diver, .reduce-motion .scene .coral, .reduce-motion .scene .fish, .reduce-motion .scene .jelly, .reduce-motion .scene .buoy, .reduce-motion .mock-input i, .reduce-motion .bar input.miss { animation: none; }
@media (prefers-reduced-motion: reduce) {
  html:not(.full-motion) .scene, html:not(.full-motion) .ruler-track { transition: none; }
  html:not(.full-motion) .snow, html:not(.full-motion) .diver, html:not(.full-motion) .scene .coral, html:not(.full-motion) .scene .fish, html:not(.full-motion) .scene .jelly, html:not(.full-motion) .scene .buoy { animation: none; }
}

/* ---------- text under the game and content pages ---------- */
.site-nav { position: sticky; top: 0; z-index: 8; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding: 10px 18px; background: rgba(12, 7, 34, 0.92); border-bottom: 1px solid var(--edge); backdrop-filter: blur(8px); }
.site-nav .brand { display: flex; align-items: center; gap: 8px; font: 600 19px var(--display); color: #fff; text-decoration: none; }
.site-nav .brand img { width: 30px; height: 30px; }
.site-nav .brand b { color: var(--amber); font-weight: 600; }
.site-nav nav { display: flex; flex-wrap: wrap; gap: 2px; }
.site-nav nav a { padding: 6px 12px; border-radius: 999px; color: var(--ink); text-decoration: none; font: 700 14px var(--body); }
.site-nav nav a:hover { background: rgba(196, 139, 255, 0.14); }
.site-nav nav a[aria-current="page"] { background: var(--amber); color: #2b1300; }
.content { max-width: 780px; margin: 0 auto; padding: 34px 18px 10px; color: #ddd3f2; }
.content h1 { color: #fff; font: 600 clamp(28px, 6vw, 40px)/1.15 var(--display); margin: 10px 0 14px; }
.content h2 { color: #fff; font: 600 26px/1.25 var(--display); margin: 38px 0 10px; }
.content h3 { color: var(--gem); font: 600 19px var(--display); margin: 24px 0 6px; }
.content .lede { font-size: 18px; color: #f1eafe; }
.content li { margin-bottom: 6px; }
.content .note { margin: 18px 0; padding: 10px 16px; border-left: 3px solid var(--amber); border-radius: 0 14px 14px 0; background: rgba(255, 181, 71, 0.08); }
.content .updated { color: var(--muted); font-size: 14px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 18px 0; }
.cards > div { background: rgba(24, 15, 52, 0.7); border: 1px solid var(--edge); border-radius: 18px; padding: 14px 16px; }
.cards h3 { margin: 0 0 6px; }
.cards p { margin: 0; font-size: 15px; }
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; position: relative; padding: 4px 0 10px 48px; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: 2px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--amber); color: #2b1300; font: 600 17px var(--display); }
.tiers { width: 100%; border-collapse: separate; border-spacing: 0 6px; font-size: 15px; }
.tiers th { text-align: left; padding: 4px 10px; color: var(--muted); font: 600 13px var(--display); letter-spacing: 0.08em; }
.tiers td { padding: 10px; background: rgba(24, 15, 52, 0.7); vertical-align: top; }
.tiers td:first-child { border-radius: 12px 0 0 12px; }
.tiers td:last-child { border-radius: 0 12px 12px 0; }
.table-wrap { overflow-x: auto; }
.example { background: rgba(45, 224, 192, 0.08); border: 1px solid rgba(45, 224, 192, 0.35); border-radius: 16px; padding: 12px 16px; margin: 16px 0; }
.example b { color: var(--teal); }
details { background: rgba(24, 15, 52, 0.7); border: 1px solid var(--edge); border-radius: 16px; padding: 12px 18px; margin: 8px 0; }
summary { cursor: pointer; font: 600 17px var(--display); color: #fff; }
details p { margin: 10px 0 0; }
.cta { text-align: center; margin: 30px 0 10px; }
.foot { max-width: 780px; margin: 0 auto; padding: 26px 18px 50px; color: var(--muted); font-size: 14px; text-align: center; }
.foot a { color: var(--muted); }
.foot .links { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 14px; margin-bottom: 10px; }
body.doc { background: radial-gradient(ellipse at 50% -20%, #3a1d63 0%, #150b33 45%, #07041a 100%) fixed; min-height: 100vh; }
.legal { max-width: 780px; margin: 0 auto; padding: 30px 18px; color: #ddd3f2; }
.legal h1 { color: #fff; font: 600 34px var(--display); }
.legal h2 { color: #fff; font: 600 22px var(--display); margin-top: 28px; }
[data-feedback-form] { margin: 22px 0; }
[data-feedback-form] .fb-row { display: flex; gap: 14px; flex-wrap: wrap; }
[data-feedback-form] .fb-row > div { flex: 1 1 220px; }
[data-feedback-form] .fb-field { margin-bottom: 16px; }
[data-feedback-form] label { display: block; margin: 0 0 6px; font-weight: 700; font-size: 14px; }
[data-feedback-form] .fb-hint { font-weight: 400; color: var(--muted); }
[data-feedback-form] input, [data-feedback-form] textarea { width: 100%; padding: 11px 14px; font: inherit; font-size: 15px; color: var(--ink); background: rgba(24, 15, 52, 0.85); border: 1px solid var(--edge); border-radius: 14px; outline: 0; }
[data-feedback-form] input:focus, [data-feedback-form] textarea:focus { border-color: var(--amber); }
[data-feedback-form] textarea { min-height: 150px; resize: vertical; }
[data-feedback-form] button[type="submit"] { width: 100%; padding: 13px 18px; font: 600 17px var(--display); color: #2b1300; background: linear-gradient(180deg, #ffd27a, #ffa53a); border: 0; border-radius: 999px; cursor: pointer; }
[data-feedback-form] button:disabled { opacity: 0.6; cursor: default; }
[data-feedback-form] [data-feedback-captcha] { margin: 4px 0 16px; }
[data-feedback-form] altcha-widget { --altcha-max-width: 100%; }
[data-feedback-form][data-state="error"] [data-feedback-status] { color: var(--none); }
[data-feedback-form][data-state="sent"] [data-feedback-status] { color: var(--rare); }

@media (min-width: 900px) {
  .prompt-card { margin-left: auto; margin-right: auto; width: 640px; }
  .bar { justify-content: center; }
}
@media (max-width: 520px) {
  .panel { padding: 4px 11px; }
  .panel b { font-size: 16px; }
  .dots i { width: 12px; height: 12px; }
  .hud { left: 60px; right: 60px; }
  .home { padding-left: 64px; padding-right: 12px; }
  .prompt-card { margin: 112px 10px 0 62px; padding: 14px 16px; }
  .bar { padding-left: 62px; }
  .verdict { margin: auto 10px 18px 62px; width: calc(100% - 72px); padding: 18px 14px 20px; }
  .diver { right: 6%; }
  .scene .buoy { left: auto; right: 4px; }
  .scene .mark.l { left: 62px; }
  .site-nav nav a { padding: 5px 9px; font-size: 13px; }
}
@media (max-width: 400px) {
  .modal { padding: 12px 12px 14px; }
  .tut-art { padding: 11px; }
  .pair .card { padding: 8px; }
  .tut-text { font-size: 14px; }
  .skins { grid-template-columns: repeat(2, 1fr); }
  .dist-row { grid-template-columns: 124px minmax(20px, 1fr) 26px 34px; gap: 6px; }
  .dist-row .chip { font-size: 11px; padding: 2px 7px; }
  .sub.tight { letter-spacing: 0.16em; }
  .rung { grid-template-columns: minmax(0, 1fr) auto 36px; }
  .rung .meter { display: none; }
}