:root {
    --kt-bg: #0d1015;
    --kt-panel: #151922;
    --kt-key: #202631;
    --kt-key-border: #343c4a;
    --kt-key-text: #e8edf5;
    --kt-muted: #9ba6b6;
    --kt-accent: #62d7a4;
    --kt-accent-text: #08130f;
}

.kt-app {
    box-sizing: border-box;
    width: 100%;
    max-width: 1180px;
    margin: 30px auto;
    padding: 24px;
    border-radius: 22px;
    background: var(--kt-bg);
    color: var(--kt-key-text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    box-shadow: 0 18px 60px rgba(0,0,0,.18);
}

.kt-app *, .kt-app *::before, .kt-app *::after { box-sizing: border-box; }

.kt-toolbar {
    display: flex;
    align-items: flex-end;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.kt-control-group { display:flex; flex-direction:column; gap:7px; }
.kt-control-group label {
    font-size:12px; font-weight:700; letter-spacing:.04em;
    color:var(--kt-muted); text-transform:uppercase;
}
.kt-select, .kt-reset {
    min-height:44px; border-radius:10px; border:1px solid var(--kt-key-border); font:inherit;
}
.kt-select {
    min-width:170px; padding:0 38px 0 13px; color:var(--kt-key-text); background:var(--kt-panel);
}
.kt-reset {
    margin-left:auto; padding:0 16px; cursor:pointer; color:var(--kt-accent-text);
    background:var(--kt-accent); border-color:var(--kt-accent); font-weight:800;
}
.kt-status {
    display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; margin-bottom:20px;
}
.kt-status-card {
    min-width:0; padding:13px 15px; border:1px solid var(--kt-key-border);
    border-radius:13px; background:var(--kt-panel);
}
.kt-status-label {
    display:block; margin-bottom:4px; color:var(--kt-muted); font-size:11px;
    font-weight:700; text-transform:uppercase; letter-spacing:.04em;
}
.kt-status-card strong {
    display:block; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:15px;
}

.kt-keyboard-wrap {
    width:100%;
    overflow:hidden;
    padding:18px;
    border:1px solid #272e39;
    border-radius:18px;
    background:radial-gradient(circle at 20% 0%,rgba(255,255,255,.035),transparent 28%),
               linear-gradient(145deg,#151a22,#0d1117);
}

.kt-keyboard {
    width:100%;
    display:grid;
    grid-template-columns:minmax(0, 1fr) minmax(180px, 22%);
    gap:12px;
    align-items:start;
}

.kt-main-section {
    min-width:0;
    display:flex;
    flex-direction:column;
    --kt-unit: calc((100% - 14 * 6px) / 15);
}

.kt-extra-section {
    min-width:0;
    display:flex;
    flex-direction:column;
    --kt-unit: calc((100% - 2 * 6px) / 3);
}

.kt-right-section {
    gap:14px;
}

.kt-row {
    display:flex;
    gap:6px;
    margin-bottom:6px;
    min-height:0;
    width:100%;
}

.kt-key {
    flex:0 0 calc(var(--kt-key-width) * var(--kt-unit));
    min-width:0;
    height:48px;
    padding:4px 5px;
    border:1px solid var(--kt-key-border);
    border-bottom-width:3px;
    border-radius:8px;
    background:linear-gradient(180deg,#272e39,#1d232c);
    color:var(--kt-key-text);
    font:700 clamp(9px, .9vw, 12px)/1.12 ui-sans-serif,system-ui,sans-serif;
    text-align:center;
    cursor:pointer;
    user-select:none;
    transition:transform .08s ease,background .08s ease,border-color .08s ease,box-shadow .08s ease;
}

.kt-key:hover { border-color:#4b5667; background:linear-gradient(180deg,#2c3440,#222a34); }
.kt-key:focus-visible { outline:2px solid var(--kt-accent); outline-offset:2px; }
.kt-key.is-pressed {
    transform:translateY(2px);
    border-color:var(--kt-accent);
    background:var(--kt-accent);
    color:var(--kt-accent-text);
    box-shadow:0 0 0 2px rgba(98,215,164,.12),0 4px 16px rgba(98,215,164,.15);
}
.kt-function-row { margin-bottom:14px; }
.kt-function-row .kt-key { height:34px; color:#bfc8d5; font-size:10px; }

.kt-numpad-section .kt-key,
.kt-nav-section .kt-key { height:48px; }

.kt-nav-section {
    display:flex;
    flex-direction:column;
}
.kt-nav-section .kt-row:nth-child(3) {
    padding-left:calc((100% - (3 * var(--kt-unit) + 2 * 6px)) / 2);
}
.kt-nav-section .kt-row:nth-child(3) .kt-key { flex-basis:var(--kt-unit); }

.kt-numpad-section .kt-row:nth-child(4) .kt-key:last-child {
    /* Enter gets a normal key-sized column, matching the 100% layout grid. */
}
.kt-note {
    margin:14px 2px 0; color:var(--kt-muted); font-size:12px; line-height:1.6;
}

@media (max-width: 900px) {
    .kt-keyboard { grid-template-columns:minmax(0,1fr) minmax(165px,24%); gap:9px; }
    .kt-keyboard-wrap { padding:12px; }
    .kt-key { height:44px; }
    .kt-function-row .kt-key { height:32px; }
    .kt-numpad-section .kt-key, .kt-nav-section .kt-key { height:44px; }
}

@media (max-width: 680px) {
    .kt-keyboard {
        grid-template-columns:1fr;
    }
    .kt-extra-section {
        display:grid;
        grid-template-columns:1fr 1fr;
        gap:8px;
    }
    .kt-right-section { display:grid; grid-template-columns:1fr 1fr; }
    .kt-key { height:44px; }
}

@media (max-width: 760px) {
    .kt-app { padding:15px; border-radius:16px; }
    .kt-status { grid-template-columns:repeat(2,minmax(0,1fr)); }
    .kt-reset { margin-left:0; width:100%; }
    .kt-keyboard-wrap { padding:10px; }
}
@media (max-width: 430px) {
    .kt-status { grid-template-columns:1fr 1fr; }
    .kt-select { width:100%; }
    .kt-control-group { width:100%; }
}
@media (prefers-reduced-motion:reduce) { .kt-key { transition:none; } }