/* ==========================================================================
   Unknot - styles
   Colours live in the variables below. Change them to re-theme the interface.
   ========================================================================== */
@font-face { font-family: "Fredoka"; src: url("../assets/fonts/fredoka-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Fredoka"; src: url("../assets/fonts/fredoka-latin-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Nunito"; src: url("../assets/fonts/nunito-latin-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Nunito"; src: url("../assets/fonts/nunito-latin-800-normal.woff2") format("woff2"); font-weight: 800; font-display: swap; }

:root {
  --ink: #0b1f33;
  --navy: #0f2a43;
  --navy2: #1a4766;
  --panel: #173a57;
  --cream: #fbf3e2;
  --text: #eaf2f8;
  --muted: #a6bdd0;
  --sun: #f6b73c;
  --coral: #ec4c3f;
  --sea: #38a3dc;
  --leaf: #4cc38a;
  --head: "Fredoka", "Trebuchet MS", sans-serif;
  --body: "Nunito", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--navy); color: var(--text); font-family: var(--body); font-weight: 700; overscroll-behavior: none; }
body { -webkit-user-select: none; user-select: none; touch-action: manipulation;
  background:
    radial-gradient(ellipse at 50% -10%, #2d6a93 0%, transparent 62%),
    repeating-linear-gradient(115deg, rgba(255,255,255,.028) 0 14px, transparent 14px 28px),
    linear-gradient(180deg, #123552, #0b2238 70%, #08192a); }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; padding: 0; }
button:focus-visible { outline: 3px solid #8fd8ff; outline-offset: 2px; }
.bg { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
body.playing .bg { display: none; }
.app { position: fixed; inset: 0; z-index: 1; display: flex; justify-content: center; }
.screen { position: absolute; inset: 0; display: none; flex-direction: column; width: 100%; max-width: 600px; left: 50%; transform: translateX(-50%);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); }
.screen.active { display: flex; animation: rise .35s cubic-bezier(.2,.8,.3,1); }
@keyframes rise { from { opacity: 0; transform: translateX(-50%) translateY(14px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.ic { width: 1.25em; height: 1.25em; flex: none; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .45em; min-height: 48px; padding: 0 1.2em;
  border: 3px solid var(--ink); border-radius: 16px; background: linear-gradient(180deg, #fffaf0, #f0e3c4); color: var(--ink);
  font-family: var(--head); font-weight: 700; font-size: 18px; letter-spacing: .01em; position: relative; white-space: nowrap;
  box-shadow: 0 5px 0 var(--ink), inset 0 2px 0 rgba(255,255,255,.7); transition: transform .08s, box-shadow .08s, filter .15s; }
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(4px); box-shadow: 0 1px 0 var(--ink), inset 0 2px 0 rgba(255,255,255,.7); }
.btn:disabled { opacity: .45; filter: grayscale(.6); pointer-events: none; }
.btn.sun { background: linear-gradient(180deg, #ffd461, #f2a926); }
.btn.coral { background: linear-gradient(180deg, #ff7a6b, #e0372b); color: #fff; }
.btn.sea { background: linear-gradient(180deg, #6fc6f2, #2d8fcb); color: #fff; }
.btn.leaf { background: linear-gradient(180deg, #7fe0b0, #34b479); color: #0b2a1c; }
.btn.sm { min-height: 42px; font-size: 16px; padding: 0 1em; border-radius: 14px; }
.btn.xl { min-height: 74px; font-size: 34px; padding: 0 2.2em; border-radius: 24px; box-shadow: 0 8px 0 var(--ink), inset 0 3px 0 rgba(255,255,255,.7); }
.btn.xl:active { transform: translateY(6px); box-shadow: 0 2px 0 var(--ink), inset 0 3px 0 rgba(255,255,255,.7); }
.btn.xl .ic { width: 1em; height: 1em; }
.btn.rb { width: 60px; height: 60px; min-height: 0; padding: 0; border-radius: 19px; }
.btn.rb .ic { width: 28px; height: 28px; }
.btn.rb.sm { width: 46px; height: 46px; border-radius: 15px; }
.btn.rb.sm .ic { width: 24px; height: 24px; }
.btn.off { opacity: .7; }

/* ---------- loader + menu ---------- */
.center-col { margin: auto; display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 16px; text-align: center; width: min(92vw, 460px); }
.knot { width: clamp(120px, 24vh, 190px); height: clamp(120px, 24vh, 190px); filter: drop-shadow(0 10px 0 rgba(0,0,0,.25)); animation: sway 5s ease-in-out infinite; }
@keyframes sway { 0%, 100% { transform: rotate(-4deg) translateY(0); } 50% { transform: rotate(4deg) translateY(-6px); } }
.wordmark { margin: 0; font-family: var(--head); font-weight: 700; font-size: clamp(44px, 9.5vh, 64px); line-height: 1.05; letter-spacing: .02em;
  background: repeating-linear-gradient(112deg, #1b57ad 0 .3em, #f3f6fa .3em .6em, #7ec4ee .6em .9em); -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 3px 0 var(--ink)) drop-shadow(2px 0 0 var(--ink)) drop-shadow(-2px 0 0 var(--ink)) drop-shadow(0 -2px 0 var(--ink)); padding: 0 6px; }
.wordmark.big { font-size: clamp(54px, 12vh, 84px); }
.tagline { margin: 0; color: var(--muted); font-size: 18px; max-width: 26ch; line-height: 1.3; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin: 4px 0 6px; }
.chip { display: inline-flex; align-items: center; gap: 7px; padding: 6px 16px 6px 12px; border: 3px solid var(--ink); border-radius: 999px; background: var(--panel); font-family: var(--head); font-size: 18px; box-shadow: 0 4px 0 var(--ink); }
.chip .ic { width: 22px; height: 22px; }
.menu-row { display: flex; gap: 18px; margin-top: 12px; justify-content: center; }
.mbtn { display: flex; flex-direction: column; align-items: center; gap: 8px; width: 92px; }
.mbtn span { font-size: 14px; color: var(--muted); }
.ropebar { width: min(72vw, 300px); height: 26px; border: 3px solid var(--ink); border-radius: 14px; background: #0a1d30; overflow: hidden; margin-top: 8px; box-shadow: 0 4px 0 var(--ink); }
.ropebar i { display: block; height: 100%; width: 0; background-size: auto 100%; background-repeat: repeat-x; transition: width .2s; animation: slide 1.2s linear infinite; border-right: 3px solid var(--ink); }
@keyframes slide { to { background-position-x: -88px; } }
.loadtxt { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- menu sign ---------- */
#menu { align-items: center; }
.menu-art { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.sign { position: relative; z-index: 1; margin-top: clamp(72px, 15vh, 130px); width: min(88vw, 420px); padding: 26px 24px 28px; display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.sign .tagline { color: #5a3a16; font-weight: 800; max-width: 22ch; }
.sign .knot.sm { width: clamp(84px, 15vh, 120px); height: clamp(84px, 15vh, 120px); margin-top: -10px; }
.sign .menu-row { margin-top: 8px; }
.sign .mbtn span { color: #5a3a16; font-weight: 800; }
#menu .chips { position: relative; z-index: 1; margin-top: auto; padding-bottom: 28px; }
@media (max-height: 700px) { .sign { margin-top: 64px; gap: 8px; padding: 20px 20px 22px; } .sign .tagline { font-size: 16px; } }

/* ---------- bars ---------- */
.bar, .hud { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 14px 6px; flex: none; }
.bar-title { margin: 0; font-family: var(--head); font-weight: 700; font-size: 30px; color: var(--cream); text-shadow: 0 3px 0 var(--ink); }
.scroll { flex: 1; min-height: 0; overflow-y: auto; padding: 8px 16px 30px; -webkit-overflow-scrolling: touch; }

/* ---------- levels ---------- */
.chapters { display: flex; flex-direction: column; gap: 26px; }
.chap-head { display: flex; align-items: center; justify-content: space-between; margin: 0 4px 8px; font-family: var(--head); font-size: 22px; color: var(--cream); text-shadow: 0 2px 0 var(--ink); }
.chap-stars { display: inline-flex; align-items: center; gap: 6px; font-size: 17px; color: var(--sun); }
.chap-stars .ic { width: 20px; height: 20px; }
.rope-strip { height: 16px; margin: 0 0 14px; border-radius: 8px; background-size: auto 100%; background-repeat: repeat-x; box-shadow: 0 3px 0 rgba(0,0,0,.3), 0 0 0 2px var(--ink); }
.grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.lv { aspect-ratio: 1; min-height: 58px; border: 3px solid var(--ink); border-radius: 16px; background: linear-gradient(180deg, #fffaf0, #efe2c2); color: var(--ink);
  box-shadow: 0 4px 0 var(--ink), inset 0 2px 0 rgba(255,255,255,.7); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; transition: transform .08s, box-shadow .08s; }
.lv:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--ink); }
.lv b { font-family: var(--head); font-weight: 700; font-size: 25px; line-height: 1; }
.lv .mini { display: flex; gap: 1px; }
.lv .mini .ic { width: 14px; height: 14px; color: #cdbf9f; }
.lv .mini .ic.on { color: var(--sun); }
.c1 .lv { background: linear-gradient(180deg, #e2f5e0, #c3e6bd); } .c2 .lv { background: linear-gradient(180deg, #ffe7cf, #f7c89a); }
.c3 .lv { background: linear-gradient(180deg, #f2e0fa, #dcbdf0); } .c4 .lv { background: linear-gradient(180deg, #d9efff, #aed7f5); }
.lv.locked { background: var(--panel) !important; color: var(--muted); box-shadow: 0 2px 0 var(--ink); pointer-events: none; opacity: .85; }
.lv .lock { width: 24px; height: 24px; }

/* ---------- game ---------- */
.hud .title { text-align: center; line-height: 1.05; }
.hud .chap { font-size: 13px; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.hud .lvl { font-family: var(--head); font-weight: 700; font-size: 28px; color: var(--cream); text-shadow: 0 3px 0 var(--ink); }
.status { display: flex; justify-content: center; gap: 10px; padding: 4px 12px 8px; flex: none; }
.st { display: flex; align-items: center; gap: 7px; padding: 5px 14px; min-height: 40px; border: 3px solid var(--ink); border-radius: 999px; background: var(--panel); box-shadow: 0 3px 0 var(--ink); font-size: 15px; }
.st-lbl { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.st b { font-family: var(--head); font-size: 22px; color: var(--cream); font-weight: 700; }
.st-of { color: var(--muted); }
.meter { display: block; width: 54px; height: 10px; border: 2px solid var(--ink); border-radius: 6px; background: #0a1d30; overflow: hidden; }
.meter i { display: block; height: 100%; width: 100%; background: var(--sea); transform-origin: left; transform: scaleX(0); transition: transform .25s; }
.meter i.low { background: var(--coral); }
#tangleBox b { color: #ff9c8f; }
#tangleBox.clear b { color: var(--leaf); }
.stage { flex: 1; min-height: 0; position: relative; margin: 0 2px; }
.stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }
.tip { flex: none; margin: 2px 14px 6px; text-align: center; color: var(--muted); font-size: 15px; min-height: 1.4em; }
.actions { flex: none; display: flex; gap: 10px; padding: 4px 14px 16px; }
.btn.act { flex: 1; flex-direction: column; gap: 2px; min-height: 66px; font-size: 16px; border-radius: 18px; }
.btn.act .ic { width: 26px; height: 26px; }
.btn.act b { font-weight: 700; }
.toast { position: fixed; left: 50%; top: calc(122px + env(safe-area-inset-top)); transform: translate(-50%, -14px); background: var(--cream); color: var(--ink); border: 3px solid var(--ink); border-radius: 14px; padding: 8px 16px; font-size: 15px; box-shadow: 0 4px 0 var(--ink); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 30; max-width: 90vw; text-align: center; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- dialogs ---------- */
.scrim { position: fixed; inset: 0; background: rgba(5,14,24,.72); display: none; align-items: center; justify-content: center; padding: 20px; z-index: 20; }
.scrim.open { display: flex; animation: fade .2s ease; }
.card { width: min(92vw, 400px); padding: 22px 20px 20px; border: 4px solid var(--ink); border-radius: 26px; background: linear-gradient(180deg, #1d4a6b, #163b57); box-shadow: 0 8px 0 var(--ink); text-align: center; }
.card.wide { width: min(94vw, 460px); }
.card h3 { margin: 0 0 8px; font-family: var(--head); font-weight: 700; font-size: 32px; color: var(--cream); text-shadow: 0 3px 0 var(--ink); }
.card p { margin: 6px 0 16px; color: var(--muted); font-size: 16px; line-height: 1.4; }
.card .col { display: flex; flex-direction: column; gap: 10px; align-items: stretch; }
.card .btn { min-width: 150px; }
.stars { display: flex; justify-content: center; gap: 6px; margin: 2px 0 6px; }
.stars .ic.big { width: 66px; height: 66px; color: #3f607c; transform: scale(.6); opacity: .6; }
.stars .ic.big.on { color: var(--sun); animation: pop .5s cubic-bezier(.2,1.6,.4,1) forwards; }
@keyframes pop { from { transform: scale(.2) rotate(-30deg); opacity: 0; } to { transform: scale(1) rotate(0); opacity: 1; } }
.steps { text-align: left; margin: 10px 0 18px; padding: 0; list-style: none; counter-reset: s; display: flex; flex-direction: column; gap: 9px; }
.steps li { counter-increment: s; position: relative; padding: 9px 12px 9px 50px; border: 3px solid var(--ink); border-radius: 14px; background: #0f2f49; font-size: 15px; line-height: 1.35; color: var(--text); }
.steps li::before { content: counter(s); position: absolute; left: 10px; top: 50%; transform: translateY(-50%); width: 30px; height: 30px; border-radius: 50%; background: var(--sun); color: var(--ink); border: 3px solid var(--ink); font-family: var(--head); font-size: 16px; display: grid; place-items: center; }
.steps b { color: var(--sun); }
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px; margin: 10px 0; border: 3px solid var(--ink); border-radius: 16px; background: #0f2f49; text-align: left; flex-wrap: wrap; }
.set-txt { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 140px; }
.set-txt b { font-family: var(--head); font-size: 19px; color: var(--cream); font-weight: 700; }
.set-txt small { color: var(--muted); font-size: 13px; }

@media (min-width: 820px) and (min-aspect-ratio: 5/4) {
  #game { max-width: none; left: 0; transform: none; display: none; --ar: .86; grid-template-columns: 1fr auto 1fr; grid-template-rows: auto 1fr auto auto auto 1fr; padding: 0 18px 10px; }
  #game.active { display: grid; }
  #game .hud { grid-column: 1 / -1; grid-row: 1; padding: 12px 0 6px; }
  #game .stage { grid-column: 2; grid-row: 2 / 7; margin: 0 22px; justify-self: center; align-self: stretch; height: 100%; width: min(calc((100vh - 96px) * var(--ar)), calc(100vw - 440px)); }
  #game .status { grid-column: 3; grid-row: 3; justify-self: start; flex-direction: column; align-items: stretch; gap: 8px; padding: 0 0 12px; width: 168px; }
  #game .status .st { justify-content: center; white-space: nowrap; padding: 5px 10px; gap: 6px; }
  #game .status .meter { width: 34px; }
  #game .actions { grid-column: 3; grid-row: 4; justify-self: start; flex-direction: column; gap: 10px; padding: 0; width: 168px; }
  #game .actions .btn.act { flex: none; flex-direction: row; justify-content: center; gap: 9px; min-height: 54px; font-size: 18px; }
  #game .tip { grid-column: 3; grid-row: 5; justify-self: start; width: 168px; margin: 12px 0 0; text-align: left; font-size: 14px; }
}
@media (max-height: 640px) {
  .knot { width: 96px; height: 96px; }
  .btn.xl { min-height: 60px; font-size: 28px; }
  .btn.act { min-height: 56px; }
  .btn.rb { width: 52px; height: 52px; }
}
/* ---------- polish ---------- */
.lv { animation: tile .4s cubic-bezier(.2,.9,.3,1.2) both; animation-delay: calc(var(--i, 0) * 28ms); }
@keyframes tile { from { opacity: 0; transform: translateY(10px) scale(.92); } to { opacity: 1; transform: none; } }
.lv.current { animation: tile .4s both, beat 1.6s ease-in-out .5s infinite; animation-delay: calc(var(--i, 0) * 28ms), .5s; outline: 3px solid var(--sun); outline-offset: 3px; }
@keyframes beat { 0%, 100% { outline-color: var(--sun); outline-offset: 3px; } 50% { outline-color: rgba(246,183,60,.35); outline-offset: 6px; } }
@media (hover: hover) {
  .lv:not(.locked):hover { transform: translateY(-3px); box-shadow: 0 7px 0 var(--ink), inset 0 2px 0 rgba(255,255,255,.7); }
  .btn:hover { transform: translateY(-2px); }
  .btn:active { transform: translateY(4px); }
}
.card { animation: cardin .3s cubic-bezier(.2,1.3,.4,1); }
@keyframes cardin { from { opacity: 0; transform: translateY(18px) scale(.94); } to { opacity: 1; transform: none; } }
.stars .ic.big:nth-child(2) { animation-delay: .15s !important; } .stars .ic.big:nth-child(3) { animation-delay: .3s !important; }
@media (min-width: 720px) {
  #levels { max-width: 820px; }
  .grid { grid-template-columns: repeat(10, 1fr); gap: 8px; }
  .lv { min-height: 0; border-radius: 13px; } .lv b { font-size: 21px; } .lv .mini .ic { width: 11px; height: 11px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }