:root {
    --ink: #2d3350;
    --ink-soft: #6a6f8e;
    --paper: #fffdf7;
    --leaf: #4cc27a;
    --leaf-dark: #2f9a5a;
    --sky: #4aa8f0;
    --sky-dark: #2a82c8;
    --sun: #ffc93c;
    --sun-dark: #e0a400;
    --coral: #ff7a6b;
    --grey: #e6e8f2;
    --grey-dark: #b9bdd3;
    --good: #2fbf71;
    --shadow: 0 6px 0 rgba(0, 0, 0, .07), 0 12px 26px rgba(50, 80, 110, .14);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body { min-height: 100%; }

body {
    font-family: 'Baloo 2', 'Trebuchet MS', sans-serif;
    color: var(--ink);
    background: linear-gradient(175deg, #d9f1ff 0%, #effaff 45%, #f3fbe9 100%);
    padding: 64px 14px 60px;
    overflow-x: hidden;
}

.grass {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: 120px;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(120% 100% at 20% 100%, #c6efb4 0 55%, transparent 56%),
        radial-gradient(110% 100% at 85% 100%, #b2e59c 0 50%, transparent 51%);
    opacity: .85;
}

/* ---------- top bar ---------- */
.topbar {
    position: fixed;
    top: 10px;
    left: 0;
    right: 0;
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    z-index: 40;
}

.chip {
    font-family: inherit;
    font-size: .95rem;
    font-weight: 700;
    color: var(--ink);
    background: rgba(255, 255, 255, .92);
    border: 2px solid #fff;
    border-radius: 999px;
    padding: .35rem .85rem;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(50, 80, 110, .13);
    transition: transform .12s;
}

.chip:hover { transform: translateY(-2px); }
.chip.starcount { cursor: default; }
.chip .s { color: var(--sun); margin-right: .3rem; }
.home-link { text-decoration: none; white-space: nowrap; }
body.at-start .topbar > :not(.home-link) { display: none; }

/* ---------- screens and cards ---------- */
.screen {
    display: none;
    position: relative;
    z-index: 1;
    max-width: 760px;
    margin: 0 auto;
}

.screen.active { display: block; animation: rise .35s ease-out; }

@keyframes rise { from { opacity: 0; transform: translateY(14px); } }

.card {
    background: var(--paper);
    border-radius: 28px;
    box-shadow: var(--shadow);
    border: 4px solid #fff;
    padding: 1.4rem 1.4rem 1.6rem;
}

.start-card { text-align: center; }

.game-title {
    font-family: 'Fredoka One', 'Baloo 2', sans-serif;
    font-size: clamp(2.2rem, 7vw, 3.2rem);
    line-height: 1.05;
    color: var(--sky-dark);
    margin-top: .4rem;
    text-shadow: 0 3px 0 rgba(0, 0, 0, .06);
}

.game-title span { color: var(--leaf); }

.tagline { color: var(--ink-soft); font-size: 1.1rem; margin: .4rem 0 1rem; }
.tagline b { color: var(--ink); }

.how-to { display: grid; gap: .6rem; text-align: left; margin-bottom: 1.2rem; }

.how-step {
    display: flex;
    align-items: center;
    gap: .8rem;
    background: #f1f8ff;
    border-radius: 18px;
    padding: .55rem .9rem;
}

.how-num {
    flex: 0 0 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--sky);
    color: #fff;
    font: 1.2rem 'Fredoka One', sans-serif;
    box-shadow: 0 3px 0 var(--sky-dark);
}

.how-num.star { background: var(--sun); box-shadow: 0 3px 0 var(--sun-dark); }

.pick-title { font: 1.4rem 'Fredoka One', sans-serif; color: var(--ink); margin-bottom: .6rem; }

.levels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: .7rem;
}

.level {
    font-family: inherit;
    text-align: left;
    background: #fff;
    border: 3px solid var(--grey);
    border-radius: 20px;
    padding: .7rem .9rem .8rem;
    cursor: pointer;
    transition: transform .12s, border-color .12s;
    color: var(--ink);
}

.level:hover { transform: translateY(-3px); border-color: var(--lc, var(--sky)); }
.level .lname { font: 1.25rem 'Fredoka One', sans-serif; color: var(--lc, var(--sky-dark)); }
.level .ldesc { font-size: .92rem; color: var(--ink-soft); line-height: 1.3; }
.level .lstars { color: var(--sun); font-size: 1.1rem; letter-spacing: 2px; margin-top: .2rem; }
.level .lstars .off { color: var(--grey-dark); }

/* ---------- Inch the caterpillar ---------- */
.inch {
    display: inline-flex;
    align-items: flex-end;
    gap: 0;
    padding-top: 22px;
    --s: 44px;
}

.inch.big { --s: 54px; }

.inch .seg {
    width: var(--s);
    height: var(--s);
    margin-right: calc(var(--s) * -.14);
    border-radius: 42%;
    background: radial-gradient(circle at 35% 30%, #8fe3a8, var(--leaf) 60%, var(--leaf-dark));
    color: #fff;
    display: grid;
    place-items: center;
    font: calc(var(--s) * .42) 'Fredoka One', sans-serif;
    text-shadow: 0 2px 0 rgba(0, 0, 0, .15);
    box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .1);
    position: relative;
    animation: wiggle 1.6s ease-in-out infinite;
}

.inch .seg:nth-child(2) { animation-delay: .12s; }
.inch .seg:nth-child(3) { animation-delay: .24s; }
.inch .seg:nth-child(4) { animation-delay: .36s; }
.inch .seg:nth-child(5) { animation-delay: .48s; }

.inch .seg::after {
    content: "";
    position: absolute;
    bottom: -7px;
    left: 30%;
    width: 7px;
    height: 9px;
    border-radius: 0 0 4px 4px;
    background: var(--leaf-dark);
    box-shadow: calc(var(--s) * .3) 0 0 var(--leaf-dark);
}

@keyframes wiggle { 50% { transform: translateY(-5px); } }

.inch .head {
    width: calc(var(--s) * 1.18);
    height: calc(var(--s) * 1.12);
    border-radius: 46%;
    background: radial-gradient(circle at 35% 30%, #ffe48a, var(--sun) 60%, #f2b51e);
    position: relative;
    margin-bottom: calc(var(--s) * .08);
    animation: wiggle 1.6s ease-in-out infinite .6s;
}

.inch .eye {
    position: absolute;
    top: 34%;
    left: 26%;
    width: 15%;
    height: 19%;
    border-radius: 50%;
    background: #2d3350;
    box-shadow: inset 2px 2px 0 0 #fff;
}

.inch .eye.r { left: 58%; }
.inch .cheek { position: absolute; top: 56%; left: 14%; width: 72%; height: 12%; background: radial-gradient(circle at 10% 50%, #ff9f9f 0 30%, transparent 32%), radial-gradient(circle at 90% 50%, #ff9f9f 0 30%, transparent 32%); }
.inch .smile { position: absolute; top: 58%; left: 36%; width: 28%; height: 16%; border: 3px solid #2d3350; border-top: 0; border-radius: 0 0 40px 40px; }

.inch .ant {
    position: absolute;
    top: -26%;
    left: 24%;
    width: 4px;
    height: 34%;
    background: #2d3350;
    transform: rotate(-18deg);
    border-radius: 2px;
}

.inch .ant::after { content: ""; position: absolute; top: -6px; left: -4px; width: 12px; height: 12px; border-radius: 50%; background: var(--coral); }
.inch .ant.r { left: 70%; transform: rotate(18deg); }

/* ---------- playing ---------- */
.progress {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-bottom: .8rem;
}

.progress i {
    width: 34px;
    height: 34px;
    border-radius: 42%;
    background: var(--grey);
    display: grid;
    place-items: center;
    font: .95rem 'Fredoka One', sans-serif;
    color: #fff;
    font-style: normal;
}

.progress i.now { background: var(--sky); box-shadow: 0 0 0 4px rgba(74, 168, 240, .25); }
.progress i.good { background: var(--leaf); }
.progress i.helped { background: var(--sun); }

.problem-top { display: flex; align-items: center; gap: .7rem; }
.emoji { font-size: 2.2rem; line-height: 1; }
.pnum { font: 1.05rem 'Fredoka One', sans-serif; color: var(--ink-soft); }

.story { font-size: 1.35rem; line-height: 1.5; margin: .5rem 0 1rem; }
.story b { color: var(--sky-dark); }

.ask { font-weight: 700; color: var(--ink-soft); margin-bottom: .35rem; }

.answer-row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }

.answer {
    font: 2rem 'Fredoka One', sans-serif;
    width: 140px;
    padding: .2rem .7rem;
    border: 3px solid var(--grey-dark);
    border-radius: 16px;
    color: var(--ink);
    background: #fff;
    text-align: center;
    outline: none;
}

.answer:focus { border-color: var(--sky); }
.answer.right { border-color: var(--good); background: #eafbf1; }
.answer.wrong { border-color: var(--coral); animation: shake .4s; }

@keyframes shake {
    20% { transform: translateX(-7px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(2px); }
}

.btn {
    font: 1.1rem 'Fredoka One', sans-serif;
    border: 0;
    border-radius: 16px;
    padding: .6rem 1.1rem;
    cursor: pointer;
    color: #fff;
    transition: transform .1s;
}

.btn:active { transform: translateY(2px); }
.btn.go { background: var(--leaf); box-shadow: 0 4px 0 var(--leaf-dark); }
.btn.soft { background: var(--sun); color: #5a4300; box-shadow: 0 4px 0 var(--sun-dark); }
.btn.blue { background: var(--sky); box-shadow: 0 4px 0 var(--sky-dark); }
.btn.big { font-size: 1.3rem; padding: .7rem 1.6rem; }
.btn:disabled { opacity: .45; cursor: default; }

.feedback { min-height: 1.6rem; margin-top: .6rem; font-size: 1.1rem; line-height: 1.4; }
.feedback.good { color: var(--leaf-dark); font-weight: 700; }
.feedback.bad { color: #c94a3d; }
.feedback .work {
    display: block;
    margin-top: .3rem;
    padding: .45rem .7rem;
    border-radius: 12px;
    background: #f1f8ff;
    color: var(--ink);
    font-weight: 600;
}

.step + .step { margin-top: 1.1rem; padding-top: 1rem; border-top: 2px dashed var(--grey); }

/* sentence builder */
.sentence {
    min-height: 54px;
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    align-items: center;
    padding: .45rem .6rem;
    border-bottom: 3px solid var(--grey-dark);
    margin-bottom: .7rem;
}

.tiles { display: flex; flex-wrap: wrap; gap: .45rem; }

.word {
    font: 700 1.15rem 'Baloo 2', sans-serif;
    padding: .25rem .8rem;
    border-radius: 12px;
    border: 2px solid var(--grey-dark);
    background: #fff;
    color: var(--ink);
    cursor: pointer;
    box-shadow: 0 3px 0 var(--grey-dark);
}

.word { touch-action: none; user-select: none; -webkit-user-select: none; }
.word.used { visibility: hidden; }
.word.lifted { opacity: .35; }
.word.ghost { position: fixed; z-index: 100; pointer-events: none; transform: rotate(-3deg) scale(1.06); box-shadow: 0 10px 22px rgba(50, 80, 110, .28); border-color: var(--sky); }
.word.ph { border: 2px dashed var(--sky); background: #eef7ff; color: transparent; box-shadow: none; }
.sentence .word { border-color: var(--sky); box-shadow: 0 3px 0 var(--sky-dark); }
.sentence.done .word { border-color: var(--leaf); box-shadow: 0 3px 0 var(--leaf-dark); cursor: default; }

.next-row { margin-top: 1.2rem; text-align: right; }

/* show-me boxes */
.grp { display: flex; flex-direction: column; margin: 0 14px 6px 0; }
.grp-boxes { display: flex; flex-wrap: wrap; gap: 6px 4px; }
.brace {
    height: 14px;
    margin: -12px 2px 22px;
    border: 3px solid var(--leaf);
    border-top: 0;
    border-radius: 0 0 10px 10px;
    position: relative;
    text-align: center;
    font-size: .95rem;
    line-height: 1;
    color: var(--leaf-dark);
}
.brace b { font-family: 'Fredoka One', sans-serif; }
.brace { padding-top: 16px; height: auto; }
.grp.unused .brace { border-color: var(--grey-dark); color: var(--ink-soft); }
.grp.unused .box .cnt { display: none; }
.boxes-card { margin-top: 1rem; }
.boxes-title { font: 1.15rem 'Fredoka One', sans-serif; margin-bottom: .6rem; }

.boxes {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 4px;
}

.box {
    position: relative;
    min-width: 38px;
    height: 40px;
    padding: 0 4px;
    display: grid;
    place-items: center;
    border-radius: 9px;
    border: 2px solid var(--grey-dark);
    background: #fff;
    font: 1rem 'Fredoka One', sans-serif;
    color: var(--grey-dark);
    margin-bottom: 18px;
    transition: background .2s, color .2s, border-color .2s, transform .2s;
}

.box.on { background: var(--leaf); border-color: var(--leaf-dark); color: #fff; transform: translateY(-2px); }
.box.skip { background: repeating-linear-gradient(45deg, #f4f5fa 0 6px, #e9ebf4 6px 12px); text-decoration: line-through; }
.box.end { box-shadow: 0 0 0 3px var(--sun); }

.box .cnt {
    position: absolute;
    top: 100%;
    margin-top: 2px;
    font: 700 .78rem 'Baloo 2', sans-serif;
    color: var(--leaf-dark);
}

.box.gap { border: 0; background: transparent; color: var(--ink-soft); min-width: 26px; font-size: 1.2rem; }

.boxes-note { margin-top: .4rem; font-size: 1.1rem; line-height: 1.45; }
.boxes-note b { color: var(--leaf-dark); }

/* result */
.result-card { text-align: center; }
.result-card h2 { font: 2.2rem 'Fredoka One', sans-serif; color: var(--sky-dark); margin-top: .4rem; }
.big-stars { font-size: 3rem; letter-spacing: 6px; color: var(--sun); margin: .3rem 0; }
.big-stars .off { color: var(--grey); }
.result-card p { font-size: 1.15rem; color: var(--ink-soft); margin-bottom: 1rem; }
.result-btns { display: flex; gap: .7rem; justify-content: center; flex-wrap: wrap; }

@media (max-width: 560px) {
    body { padding: 58px 8px 50px; }
    .card { border-radius: 22px; padding: 1.1rem 1rem 1.3rem; }
    .story { font-size: 1.2rem; }
    .answer { width: 110px; font-size: 1.7rem; }
    .btn { font-size: 1rem; padding: .55rem .9rem; }
    .box { min-width: 32px; height: 36px; font-size: .9rem; }
    .inch.big { --s: 44px; }
}

/* Show me, step by step */
.stepno {
    display: inline-block;
    font: 700 .85rem 'Baloo 2', sans-serif;
    color: #fff;
    background: var(--sky);
    border-radius: 999px;
    padding: .05rem .6rem;
    margin-right: .3rem;
    vertical-align: 2px;
}

.stepbody { font-size: 1.2rem; line-height: 1.5; }
.stepbody b { color: var(--leaf-dark); }

.mini { display: flex; gap: 8px; margin: .6rem 0 .2rem; }
.mini .box { min-width: 64px; height: 64px; font-size: 1.25rem; flex-direction: column; display: flex; justify-content: center; margin-bottom: 22px; }
.mini .box .ico { font-size: .95rem; line-height: 1; }
.mini .box .cnt { font-size: .85rem; }

.ptab { border-collapse: collapse; margin: .4rem 0 .7rem; font-size: 1.15rem; }
.ptab th, .ptab td { padding: .2rem .9rem; text-align: center; border-bottom: 2px solid var(--grey); }
.ptab th { font: 1rem 'Fredoka One', sans-serif; color: var(--ink-soft); }
.ptab td:last-child { color: var(--leaf-dark); font-weight: 800; }

.eq {
    margin-top: .6rem;
    font: 2rem 'Fredoka One', sans-serif;
    color: var(--ink);
}

.eq b { color: var(--leaf-dark); }

.stepnav { display: flex; justify-content: space-between; margin-top: .9rem; }

.sline { margin: .15rem 0; }
.bar2 { display: flex; gap: 4px; margin: .5rem 0 .2rem; min-height: 62px; }
.bar2 > div {
    border-radius: 12px;
    padding: .3rem .6rem;
    font-size: 1rem;
    line-height: 1.25;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}
.bar2 small { font-size: .85rem; opacity: .85; }
.seg-n { background: repeating-linear-gradient(45deg, #f1f2f8 0 7px, #e5e7f1 7px 14px); color: var(--ink-soft); border: 2px solid var(--grey-dark); }
.seg-u { background: var(--leaf); color: #fff; border: 2px solid var(--leaf-dark); }
.seg-u b { color: #fff; }
.mini .box { margin-bottom: 4px; }