/*v2.0*/
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root{
    --ink: #0b1320;
    --ink-muted: #4b5563;
    --panel: rgba(255, 255, 255, 0.86);
    --panel-border: rgba(15, 23, 42, 0.08);
    --accent-cool: #0ea5e9;
    --accent-warm: #f97316;
}
body.clock-page{
    font-family: "Space Grotesk", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(1200px 600px at 8% -10%, #e8f3ff 0%, rgba(232, 243, 255, 0) 60%),
        radial-gradient(800px 400px at 92% 8%, #fff3e0 0%, rgba(255, 243, 224, 0) 60%),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    min-height: 100vh;
    overflow-x: hidden;
}
.clock-layout{
    min-height: 100vh;
    padding: 1.5rem 0 2rem;
    display: flex;
    flex-direction: column;
}
.clock-topbar{
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 0.75rem;
    padding: 0 2rem 1rem;
    position: sticky;
    top: 0;
    z-index: 10;
}
.clock-page-topbar{
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}
.clock-page-title{
    font-size: 1.15rem;
    font-weight: 600;
}
.clock-page-actions{
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.clock-filter-btn{
    border-radius: 999px;
    padding: 0.6rem 1.4rem;
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.18);
}
.clock-lang-toggle{
    border-radius: 999px;
    padding: 0.6rem 1.1rem;
}
.clock-compare-topbar{
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.clock-compare-title{
    font-size: 1.15rem;
    font-weight: 600;
}
.clock-compare-container{
    max-width: 1200px;
}
.clock-compare-controls{
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: center;
    margin: 0.5rem 0 1.25rem;
}
.clock-compare-filters,
.clock-filters{
    margin: 0.5rem 0 1.25rem;
    padding: 0.75rem 1rem;
    border-radius: 18px;
    background: var(--panel);
    border: 1px solid var(--panel-border);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}
.clock-compare-filters-title{
    font-weight: 600;
}
.clock-compare-filters .form-check,
.clock-filters .form-check{
    margin-bottom: 0;
}
.clock-compare-filters .form-label,
.clock-filters .form-label{
    margin-bottom: 0.25rem;
}
.clock-compare-filters .form-control,
.clock-filters .form-control{
    min-width: 140px;
}
.clock-compare-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    align-items: start;
}
.clock-compare-card{
    background: var(--panel);
    border-radius: 20px;
    padding: 1rem 1rem 1.25rem;
    border: 1px solid var(--panel-border);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
}
.clock-compare-card-title{
    font-weight: 600;
    margin-bottom: 0.75rem;
}
.clock-compare-analog{
    display: flex;
    justify-content: center;
}
.clock-compare-digital{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.clock-shell.clock-shell-compare{
    width: min(52vh, 100%, 380px);
    height: auto;
    aspect-ratio: 1;
    padding: 0.9rem;
}
.clock-compare-result{
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}
.clock-compare-result-panel{
    text-align: center;
}
.clock-compare-output{
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.12);
}
.clock-compare-practice{
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}
.clock-compare-inputs{
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}
.clock-compare-input{
    min-width: 90px;
}
.clock-compare-feedback{
    min-height: 1.25rem;
    font-weight: 600;
}
.clock-main{
    flex: 1;
    margin-left: 0;
    margin-right: 0;
}
.clock-refresh-bar{
    display: flex;
    justify-content: center;
    margin: 0.5rem 0 0.75rem;
}
.clock-overlay-actions{
    position: fixed;
    left: 50%;
    bottom: 1.25rem;
    transform: translateX(-50%);
    display: none;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.12);
    backdrop-filter: blur(8px);
    z-index: 15;
}
.clock-controls{
    background: rgba(255, 255, 255, 0.7);
    border-radius: 16px;
    padding: 0.85rem 1rem;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
    margin-bottom: 1.75rem;
}
.clock-stage{
    height: 70vh;
    min-height: 320px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem;
}
.clock-shell{
    --clock-size: min(100%, calc(70vh - 3rem), 640px);
    width: var(--clock-size);
    height: var(--clock-size);
    aspect-ratio: 1;
    border-radius: 50%;
    padding: 1.5rem;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.7));
    box-shadow: 0 30px 60px rgba(15, 23, 42, 0.2), inset 0 0 0 1px var(--panel-border);
    display: flex;
    align-items: center;
    justify-content: center;
}
.clock{
    height: 100%;
    width: 100%;
    border-radius: 50%;
    position: relative;
    --tick-offset: 0.5deg;
    --tick-inner: 56%;
    --tick-outer: 66%;
    border: none;
    outline: 6px solid #111;
    outline-offset: 0;
    background:
        radial-gradient(circle at 30% 30%, #ffffff 0%, #f8fafc 45%, #e2e8f0 100%);
    box-shadow: inset 0 0 30px rgba(15, 23, 42, 0.1);
    overflow: hidden;
}
.clock::before{
    content: "";
    position: absolute;
    inset: 6%;
    border-radius: 50%;
    background:
        repeating-conic-gradient(
            from calc(-90deg - var(--tick-offset)),
            rgba(15, 23, 42, 0.5) 0deg 0.7deg,
            rgba(15, 23, 42, 0.2) 0.7deg 0.9deg,
            transparent 0.9deg 6deg
        );
    -webkit-mask: radial-gradient(circle, transparent 0 var(--tick-inner), #000 var(--tick-inner) var(--tick-outer), transparent var(--tick-outer) 100%);
    mask: radial-gradient(circle, transparent 0 var(--tick-inner), #000 var(--tick-inner) var(--tick-outer), transparent var(--tick-outer) 100%);
    z-index: 1;
    transform: translateZ(0);
}
.clock::after{
    content: "";
    position: absolute;
    inset: 6%;
    border-radius: 50%;
    background:
        repeating-conic-gradient(
            from calc(-90deg - var(--tick-offset)),
            rgba(15, 23, 42, 0.95) 0deg 0.7deg,
            rgba(15, 23, 42, 0.55) 0.7deg 0.9deg,
            transparent 0.9deg 30deg
        );
    -webkit-mask: radial-gradient(circle, transparent 0 calc(var(--tick-inner) - 6%), #000 calc(var(--tick-inner) - 6%) var(--tick-outer), transparent var(--tick-outer) 100%);
    mask: radial-gradient(circle, transparent 0 calc(var(--tick-inner) - 6%), #000 calc(var(--tick-inner) - 6%) var(--tick-outer), transparent var(--tick-outer) 100%);
    z-index: 2;
    transform: translateZ(0);
}
.clock-face{
    position: absolute;
    inset: 6%;
    border-radius: 50%;
    z-index: 3;
    pointer-events: none;
}
.clock-number{
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    font-weight: 600;
    color: var(--ink);
    font-size: clamp(1rem, 2.8vw, 1.45rem);
    transform: rotate(var(--angle));
}
.clock-number span{
    transform: translateY(-62%) rotate(calc(-1 * var(--angle)));
    font-family: "Space Grotesk", sans-serif;
}
.clock-number.n12{ --angle: 0deg; }
.clock-number.n1{ --angle: 30deg; }
.clock-number.n2{ --angle: 60deg; }
.clock-number.n3{ --angle: 90deg; }
.clock-number.n4{ --angle: 120deg; }
.clock-number.n5{ --angle: 150deg; }
.clock-number.n6{ --angle: 180deg; }
.clock-number.n7{ --angle: 210deg; }
.clock-number.n8{ --angle: 240deg; }
.clock-number.n9{ --angle: 270deg; }
.clock-number.n10{ --angle: 300deg; }
.clock-number.n11{ --angle: 330deg; }
.clock-center{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14px;
    height: 14px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 0 0 6px rgba(15, 23, 42, 0.15);
    z-index: 5;
}
.wallet{
    /*background-color: orange;*/
    height: 100%;
    width: 100%;
    max-width: 800px;

    /*border-radius: 50%;*/
    /*border: 5px solid black;*/
    position: relative;
    /*background-image: url("https://cdn.icon-icons.com/icons2/1471/PNG/512/07-wallet_101185.png");*/
    background-position: center;
    background-size: contain;
    background-repeat: no-repeat;
}
.vulling{
    background-image: url("https://cdn.icon-icons.com/icons2/1471/PNG/512/07-wallet_101185.png");
    background-position: center;
    background-size: contain;
    background-repeat: no-repeat;
}
.hour{
    position: absolute;
    top: 50%;
    left: 50%;
    height: 6px;
    width: 28%;
    background: linear-gradient(90deg, #f97316, #ef4444);
    border-radius: 999px;
    transform: rotate(-90deg);
    transform-origin: left;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35);
    z-index: 4;
}
.min,
.sec{
    position: absolute;
    top: 50%;
    left: 50%;
    height: 4px;
    width: 42%;
    background: linear-gradient(90deg, #0ea5e9, #14b8a6);
    border-radius: 999px;
    transform: rotate(-90deg);
    transform-origin: left;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
    z-index: 4;
}
.sec{
    height: 2px;
    width: 48%;
    background: linear-gradient(90deg, #0f3d2e, #166534);
    box-shadow: 0 4px 10px rgba(22, 101, 52, 0.25);
}
.digitalClock{
    font-family: "IBM Plex Mono", "Courier New", monospace;
    color: var(--ink);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    text-align: center;
    padding: 0.85rem 1.1rem;
    margin: 0.75rem auto;
    background: var(--panel);
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
    width: min(260px, 90%);
}
.digitalClockSeconds{
    font-size: 0.7em;
}
.clock-message{
    min-height: 1.25rem;
    margin-top: 0.75rem;
    font-size: 0.95rem;
    color: #b45309;
}
.clock-btn{
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: 0.02em;
}
.btn-warning.clock-btn{
    background: #fbbf24;
    border-color: #f59e0b;
    color: #1f2937;
}
.btn-success.clock-btn{
    background: #10b981;
    border-color: #0f766e;
}
.is-hidden{
    display: none !important;
}

body.clock-home{
    font-family: "Space Grotesk", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(1000px 520px at 12% -10%, #dbeafe 0%, rgba(219, 234, 254, 0) 60%),
        radial-gradient(900px 460px at 88% 0%, #ffedd5 0%, rgba(255, 237, 213, 0) 60%),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    min-height: 100vh;
}
.home-shell{
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}
.home-panel{
    width: min(1040px, 100%);
}
.home-hero{
    text-align: center;
    margin-bottom: 2rem;
}
.home-kicker{
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    font-size: 0.95rem;
}
.home-title{
    margin: 1rem 0 0.75rem;
    font-size: clamp(2.2rem, 6vw, 4.4rem);
    font-weight: 600;
    line-height: 0.95;
}
.home-subtitle{
    max-width: 640px;
    margin: 0 auto;
    color: var(--ink-muted);
    font-size: 1.05rem;
}
.home-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.home-card{
    position: relative;
    display: block;
    padding: 1.5rem;
    min-height: 260px;
    border-radius: 28px;
    color: inherit;
    text-decoration: none;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
    transition: transform 180ms ease, box-shadow 180ms ease;
}
.home-card:hover,
.home-card:focus-visible{
    transform: translateY(-4px);
    box-shadow: 0 28px 48px rgba(15, 23, 42, 0.16);
}
.home-card::before{
    content: "";
    position: absolute;
    inset: auto -20% -25% auto;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(14, 165, 233, 0.14);
}
.home-card--warm::before{
    background: rgba(249, 115, 22, 0.16);
}
.home-card--play::before{
    background: rgba(34, 197, 94, 0.18);
}
.home-card--teacher::before{
    background: rgba(251, 191, 36, 0.2);
}
.home-card-label{
    display: inline-flex;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    font-size: 0.9rem;
}
.home-card-title{
    margin-top: 1rem;
    font-size: clamp(1.9rem, 4vw, 2.8rem);
    font-weight: 600;
}
.home-card-copy{
    max-width: 28ch;
    margin-top: 0.75rem;
    color: var(--ink-muted);
}
.home-card-arrow{
    position: absolute;
    right: 1.25rem;
    bottom: 1.25rem;
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #111827;
    color: #fff;
    font-size: 1.2rem;
}

body.clock-practice{
    font-family: "Space Grotesk", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(1200px 600px at 8% -10%, #e8f3ff 0%, rgba(232, 243, 255, 0) 60%),
        radial-gradient(800px 400px at 92% 8%, #fff3e0 0%, rgba(255, 243, 224, 0) 60%),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    min-height: 100vh;
}
.practice-shell{
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}
.practice-topbar{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.practice-title{
    font-size: 1.25rem;
    font-weight: 600;
}
.practice-grid{
    display: grid;
    grid-template-columns: minmax(280px, 360px) 1fr;
    gap: 1.5rem;
    align-items: start;
}
.practice-card{
    background: var(--panel);
    border-radius: 24px;
    padding: 1.25rem;
    border: 1px solid var(--panel-border);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
}
.practice-card h2{
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1rem;
}
.practice-options{
    display: grid;
    gap: 0.85rem;
}
.practice-clock-stage{
    display: flex;
    justify-content: center;
    margin: 1rem 0 1.25rem;
}
.practice-clock-shell{
    width: min(70vw, 460px);
    aspect-ratio: 1;
}
.practice-meta{
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.practice-progress{
    font-weight: 600;
}
.practice-feedback{
    min-height: 3rem;
}
.practice-feedback-box{
    padding: 0.85rem 1rem;
    border-radius: 16px;
    font-weight: 600;
}
.practice-feedback-box.is-correct{
    background: rgba(16, 185, 129, 0.16);
    color: #065f46;
}
.practice-feedback-box.is-wrong{
    background: rgba(239, 68, 68, 0.14);
    color: #991b1b;
}
.practice-summary{
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(15, 23, 42, 0.08);
}
.practice-history{
    margin-top: 1rem;
    display: grid;
    gap: 0.65rem;
}
.practice-history-item{
    padding: 0.75rem 0.9rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(15, 23, 42, 0.08);
}

body.conversion-page{
    font-family: "Space Grotesk", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(900px 420px at 12% -8%, rgba(253, 224, 71, 0.38) 0%, rgba(253, 224, 71, 0) 60%),
        radial-gradient(800px 460px at 90% 4%, rgba(56, 189, 248, 0.28) 0%, rgba(56, 189, 248, 0) 60%),
        linear-gradient(180deg, #fffdf5 0%, #f0f9ff 55%, #eefcf1 100%);
    min-height: 100vh;
}
.conversion-shell{
    max-width: 1120px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}
.conversion-panel{
    display: grid;
    gap: 1.5rem;
}
.conversion-topbar{
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    flex-wrap: wrap;
}
.conversion-kicker{
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    font-size: 0.95rem;
}
.conversion-title{
    margin: 1rem 0 0.65rem;
    font-size: clamp(2.2rem, 6vw, 4.2rem);
    font-weight: 700;
    line-height: 0.95;
}
.conversion-subtitle{
    max-width: 58ch;
    color: var(--ink-muted);
    font-size: 1.05rem;
}
.conversion-card{
    background: rgba(255, 255, 255, 0.9);
    border-radius: 28px;
    padding: 1.5rem;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 24px 50px rgba(15, 23, 42, 0.12);
}
.conversion-card-header h2,
.conversion-end h2{
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}
.conversion-card-header p{
    color: var(--ink-muted);
    margin-bottom: 0;
}
.conversion-setup{
    display: grid;
    gap: 1.5rem;
    margin-top: 1.5rem;
}
.conversion-label{
    display: inline-block;
    margin-bottom: 0.7rem;
    font-weight: 700;
}
.conversion-choice-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 1rem;
}
.conversion-choice{
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-height: 112px;
    padding: 1rem 1rem 1rem 3.4rem;
    border-radius: 24px;
    cursor: pointer;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.96));
    border: 2px solid rgba(148, 163, 184, 0.24);
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.conversion-choice:hover,
.conversion-choice:focus-within{
    transform: translateY(-3px);
    border-color: rgba(14, 165, 233, 0.4);
    box-shadow: 0 18px 32px rgba(14, 165, 233, 0.14);
}
.conversion-choice input{
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 1.3rem;
    height: 1.3rem;
}
.conversion-choice span{
    font-size: 1.2rem;
    font-weight: 700;
}
.conversion-choice small{
    color: var(--ink-muted);
    font-size: 0.95rem;
}
.conversion-choice input:checked + span{
    color: #0369a1;
}
.conversion-choice-grid--levels .conversion-choice{
    min-height: 124px;
}
.conversion-start-btn{
    justify-self: start;
    padding: 0.85rem 1.5rem;
    font-size: 1.05rem;
}
.conversion-statusbar{
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
}
.conversion-badge,
.conversion-score{
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    background: rgba(241, 245, 249, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.08);
    font-weight: 700;
}
.conversion-progress-wrap{
    margin-top: 1.25rem;
}
.conversion-progress-label{
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.conversion-progress-bar{
    width: 100%;
    height: 16px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(226, 232, 240, 0.95);
}
.conversion-progress-fill{
    width: 10%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #38bdf8, #22c55e);
    transition: width 180ms ease;
}
.conversion-question-block{
    margin: 1.75rem 0 1rem;
    padding: 1.5rem;
    border-radius: 24px;
    background:
        radial-gradient(circle at top right, rgba(253, 224, 71, 0.3), rgba(253, 224, 71, 0) 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.96));
    border: 1px solid rgba(15, 23, 42, 0.08);
}
.conversion-question{
    margin-bottom: 0.4rem;
    font-size: clamp(1.6rem, 4vw, 2.35rem);
    font-weight: 700;
    line-height: 1.15;
}
.conversion-hint{
    margin-bottom: 0;
    color: var(--ink-muted);
}
.conversion-helper{
    display: grid;
    gap: 0.9rem;
    margin-bottom: 1.25rem;
    min-width: 0;
}
.conversion-helper-toggle{
    justify-self: start;
}
.conversion-table-panel{
    padding: 1rem;
    border-radius: 22px;
    background: rgba(248, 250, 252, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.08);
    min-width: 0;
    overflow-x: hidden;
}
.conversion-table-header h3{
    margin: 0 0 0.3rem;
    font-size: 1.1rem;
    font-weight: 700;
}
.conversion-table-header p{
    margin: 0 0 0.85rem;
    color: var(--ink-muted);
}
.conversion-table-wrap{
    flex: 1;
    width: 100%;
    min-width: 0;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}
.conversion-table-builder{
    display: flex;
    align-items: stretch;
    gap: 0.75rem;
    width: 100%;
    min-width: 0;
}
.conversion-table{
    width: max-content;
    min-width: 100%;
    border-collapse: separate;
    border-spacing: 0.5rem;
}
.conversion-table-add{
    width: 52px;
    min-width: 52px;
    align-self: center;
    border-radius: 18px;
    font-size: 1.6rem;
    line-height: 1;
}
.conversion-table-add:disabled{
    opacity: 0.45;
}
.conversion-table th{
    min-width: 70px;
    padding: 0.7rem 0.4rem;
    border-radius: 16px;
    text-align: center;
    background: rgba(14, 165, 233, 0.12);
    color: #075985;
    font-weight: 700;
}
.conversion-table td{
    padding: 0;
}
.conversion-table-input{
    min-width: 70px;
    min-height: 52px;
    text-align: center;
    border-radius: 16px;
    border: 2px solid rgba(148, 163, 184, 0.22);
}
.conversion-table-clear{
    margin-top: 0.75rem;
}
.conversion-answer-form{
    display: grid;
    gap: 0.75rem;
}
.conversion-answer-row{
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.conversion-input{
    flex: 1 1 240px;
    min-height: 56px;
    border-radius: 18px;
    font-size: 1.1rem;
    border: 2px solid rgba(148, 163, 184, 0.22);
}
.conversion-check-btn{
    min-height: 56px;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
}
.conversion-feedback{
    min-height: 4.5rem;
    margin-top: 1rem;
}
.conversion-feedback-box{
    padding: 1rem 1.1rem;
    border-radius: 20px;
    font-weight: 700;
    line-height: 1.45;
}
.conversion-feedback-box.is-correct{
    background: rgba(34, 197, 94, 0.16);
    color: #166534;
}
.conversion-feedback-box.is-wrong{
    background: rgba(251, 191, 36, 0.2);
    color: #92400e;
}
.conversion-actions{
    margin-top: 1rem;
}
.conversion-end{
    text-align: center;
}
.conversion-celebration{
    max-width: 620px;
    margin: 0 auto;
}
.conversion-trophy{
    width: 78px;
    height: 78px;
    margin: 0 auto 1rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: linear-gradient(180deg, #facc15, #f59e0b);
    color: #fff;
    font-size: 2rem;
    box-shadow: 0 20px 40px rgba(245, 158, 11, 0.28);
}
.conversion-result{
    font-size: 1.25rem;
    font-weight: 700;
}
.conversion-result-copy{
    color: var(--ink-muted);
}
.conversion-summary-list{
    display: grid;
    gap: 0.85rem;
    margin: 1.5rem auto 0;
    max-width: 760px;
    text-align: left;
}
.conversion-summary-item{
    display: grid;
    gap: 0.2rem;
    padding: 1rem;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.08);
}
.conversion-summary-item.is-correct{
    border-color: rgba(34, 197, 94, 0.26);
}
.conversion-summary-item.is-wrong{
    border-color: rgba(245, 158, 11, 0.32);
}
.teacher-card{
    overflow: hidden;
}
.teacher-card-header{
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    flex-wrap: wrap;
}
.teacher-card-badge{
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    background: rgba(251, 191, 36, 0.18);
    border: 1px solid rgba(245, 158, 11, 0.22);
    font-weight: 700;
    color: #92400e;
}
.teacher-grid{
    display: grid;
    grid-template-columns: minmax(260px, 320px) 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
    align-items: start;
}
.teacher-filters{
    padding: 1rem;
    border-radius: 24px;
    background: rgba(248, 250, 252, 0.86);
    border: 1px solid rgba(15, 23, 42, 0.08);
}
.teacher-filter-form{
    display: grid;
    gap: 1rem;
}
.teacher-stage{
    display: grid;
    gap: 1rem;
    min-width: 0;
}
.teacher-meta{
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.teacher-question-block{
    margin: 0;
}
.teacher-question{
    font-size: clamp(1.4rem, 3vw, 2rem);
}
.teacher-actions{
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.teacher-solution{
    display: grid;
    gap: 1rem;
    padding: 1rem;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(15, 23, 42, 0.08);
}
.teacher-solution-copy h3{
    margin: 0 0 0.35rem;
    font-size: 1.1rem;
    font-weight: 700;
}
.teacher-solution-answer{
    margin-bottom: 0.45rem;
    font-size: 1.15rem;
    font-weight: 700;
}
.teacher-solution-explanation{
    margin-bottom: 0;
    color: var(--ink-muted);
}
.teacher-table-wrap{
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.teacher-solution-table{
    width: max-content;
    min-width: 100%;
}
.teacher-solution-table th:first-child{
    min-width: 88px;
    background: rgba(15, 23, 42, 0.08);
    color: var(--ink);
}
.teacher-target-column{
    border-right: 3px solid #0f766e !important;
}
.teacher-solution-table td{
    min-width: 52px;
    height: 52px;
    text-align: center;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.08);
    font-weight: 700;
}
.teacher-cell-source{
    font-weight: 700;
    color: var(--ink);
}
.teacher-cell-fill{
    color: #2563eb;
    font-weight: 500;
}
.teacher-cell-result{
    color: #166534;
}
.teacher-solution-result-row td,
.teacher-solution-result-row th{
    background: rgba(34, 197, 94, 0.12);
}

@media (max-width: 991.98px){
    .clock-side{
        display: none;
    }
    .clock-overlay-actions{
        display: flex;
    }
    .clock-stage{
        height: 70vh;
    }
    .clock-shell{
        --clock-size: min(92vw, calc(70vh - 3rem));
    }
    .practice-grid{
        grid-template-columns: 1fr;
    }
    .practice-clock-shell{
        width: min(88vw, 420px);
    }
    .conversion-topbar{
        align-items: stretch;
    }
    .teacher-grid{
        grid-template-columns: 1fr;
    }
}
@media (max-width: 575.98px){
    .clock-shell.clock-shell-compare{
        width: 100%;
        max-width: none;
        padding: 0.6rem;
    }
    .home-shell{
        padding: 1rem;
    }
    .home-card{
        min-height: 220px;
    }
    .conversion-shell{
        padding-left: 0.85rem;
        padding-right: 0.85rem;
    }
    .conversion-card{
        padding: 1.15rem;
    }
    .conversion-choice{
        min-height: 98px;
        padding-left: 3.1rem;
    }
    .conversion-answer-row{
        flex-direction: column;
    }
    .conversion-input{
        flex: none;
        width: 100%;
    }
    .conversion-table-builder{
        flex-direction: column;
    }
    .conversion-table-add{
        width: 100%;
    }
    .conversion-table{
        border-spacing: 0.35rem;
    }
    .conversion-table th{
        min-width: 48px;
        padding: 0.55rem 0.25rem;
        font-size: 0.78rem;
    }
    .conversion-table-input{
        min-width: 48px;
        width: 48px;
        min-height: 46px;
        padding: 0.35rem 0.2rem;
        font-size: 1rem;
    }
    .conversion-check-btn,
    .conversion-start-btn,
    .conversion-actions .clock-btn{
        width: 100%;
    }
}
@media (min-width: 992px){
    .clock-compare-filters.collapse,
    .clock-filters.collapse{
        display: block !important;
        height: auto !important;
        visibility: visible;
        overflow: visible;
    }
    .clock-compare-filters.collapse:not(.show),
    .clock-filters.collapse:not(.show){
        height: auto !important;
    }
}