:root{--ink:#182230;--muted:#5e6b7a;--line:#e3e8ef;--surface:#fff;--wash:#f5f7fb;--brand:#2459d3;--brand-dark:#1946ad;--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--wash);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner,.footer-inner{max-width:1180px;margin:0 auto;padding:16px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:1.15rem;font-weight:750;text-decoration:none}.brand-mark{display:grid;place-items:center;width:36px;height:36px;background:#eaf0ff;color:var(--brand);border-radius:12px;font-size:1.45rem}.top-nav,.site-footer nav{display:flex;gap:18px;flex-wrap:wrap}.top-nav a,.site-footer a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.94rem}.top-nav a:hover,.site-footer a:hover{color:var(--brand)}.layout{max-width:1180px;margin:30px auto;padding:0 22px;display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:24px;align-items:start}.main-content{min-width:0}.intro,.timer-panel,.content-article,.not-found,.sidebar-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.intro{padding:28px 30px;margin-bottom:22px}.eyebrow{margin:0 0 8px;color:var(--brand);font-size:.78rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase}h1{font-size:clamp(1.8rem,4vw,2.55rem);line-height:1.15;letter-spacing:-.035em;margin:0 0 14px}h2{font-size:1.2rem;line-height:1.3;margin:0 0 12px}.intro p:last-child{margin-bottom:0;color:var(--muted);max-width:760px}.timer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.timer-card{position:relative;display:flex;align-items:center;gap:12px;min-height:74px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:13px;color:var(--ink);text-decoration:none;font-weight:700;transition:transform .15s,border-color .15s}.timer-card:hover{transform:translateY(-2px);border-color:#aabcf5}.card-time{display:grid;place-items:center;flex:0 0 42px;height:42px;border-radius:12px;background:#edf2ff;color:var(--brand);font-size:1.1rem}.card-arrow{margin-left:auto;color:#8994a4}.sidebar{display:grid;gap:16px}.sidebar-box{padding:20px}.sidebar-links{list-style:none;padding:0;margin:0}.sidebar-links li+li{border-top:1px solid #eff1f5}.sidebar-links a{display:block;padding:8px 0;color:#334155;text-decoration:none;font-size:.94rem}.sidebar-links a:hover{color:var(--brand)}.sidebar-note{background:#eef3ff;border-color:#dbe5ff}.sidebar-note p{margin:0;color:#4c5b75;font-size:.94rem}.breadcrumbs{display:flex;gap:9px;align-items:center;margin:0 0 14px;color:var(--muted);font-size:.9rem}.breadcrumbs a{color:var(--brand);text-decoration:none}.timer-intro{margin-bottom:16px}.timer-panel{padding:28px;text-align:center}.timer-display{font-size:clamp(3.8rem,11vw,6.8rem);font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.055em;line-height:1.2;margin:8px 0 20px}.timer-progress{height:8px;max-width:500px;margin:0 auto 24px;background:#edf0f5;border-radius:99px;overflow:hidden}.timer-progress div{height:100%;width:0;background:var(--brand);border-radius:99px;transition:width .15s}.timer-controls{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 20px;border:1px solid #d4dbe6;border-radius:11px;background:#fff;color:var(--ink);font:inherit;font-weight:750;text-decoration:none;cursor:pointer}.button:hover:not(:disabled){border-color:#aeb9ca;background:#f8faff}.button.primary{background:var(--brand);border-color:var(--brand);color:#fff}.button.primary:hover:not(:disabled){background:var(--brand-dark)}.button:disabled{opacity:.45;cursor:not-allowed}.timer-status{min-height:24px;color:var(--muted);font-size:.92rem}.quick-times,.related-links{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:18px}.quick-times a,.related-links a{padding:6px 11px;border:1px solid var(--line);border-radius:9px;background:#fff;color:#334155;text-decoration:none;font-size:.9rem}.quick-times a[aria-current=page],.quick-times a:hover,.related-links a:hover{border-color:#b8c8ff;color:var(--brand);background:#f5f7ff}.content-article{margin-top:20px;padding:28px 30px}.content-article h2:not(:first-child){margin-top:28px}.content-article p,.content-article li{color:#4f5b6b}.content-article li+li{margin-top:7px}.content-article .related-links{justify-content:flex-start}.not-found{padding:36px}.site-footer{margin-top:40px;background:#fff;border-top:1px solid var(--line)}.footer-inner{flex-wrap:wrap}.footer-inner p{margin:4px 0;color:var(--muted);font-size:.9rem}.copyright{width:100%;padding-top:14px;border-top:1px solid var(--line)}@media(max-width:900px){.layout{grid-template-columns:minmax(0,1fr) 220px;gap:16px}.timer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intro,.content-article{padding:24px}}@media(max-width:680px){.header-inner{align-items:flex-start;flex-direction:column}.layout{display:flex;flex-direction:column;margin:18px auto}.main-content,.sidebar{width:100%}.sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}.timer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.timer-card{padding:10px;gap:8px;font-size:.9rem}.card-time{flex-basis:36px;height:36px}.intro,.timer-panel,.content-article{padding:20px}.sidebar-box{padding:16px}.footer-inner{align-items:flex-start;flex-direction:column}.copyright{width:100%}}@media(max-width:420px){.sidebar{grid-template-columns:1fr}.timer-card{min-height:66px}}


/* Time Conversion Section */
.time-conversion {
    margin: 35px 0;
    padding: 24px;
    background: #ffffff;
    border: 1px solid #e5eaf0;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.04);
}

.time-conversion h2 {
    margin: 0 0 10px;
    font-size: 23px;
    line-height: 1.4;
    color: #172b4d;
}

.time-conversion p {
    margin: 0 0 20px;
    color: #64748b;
    font-size: 15px;
    line-height: 1.6;
}

/* Responsive Table Wrapper */
.conversion-table-wrap {
    width: 100%;
    overflow-x: auto;
    border: 1px solid #e5eaf0;
    border-radius: 9px;
}

/* Conversion Table */
.conversion-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 15px;
}

.conversion-table th {
    padding: 14px 18px;
    background: #f1f5f9;
    color: #172b4d;
    font-weight: 700;
    border-bottom: 1px solid #e2e8f0;
}

.conversion-table td {
    padding: 13px 18px;
    color: #334155;
    border-bottom: 1px solid #edf0f4;
}

.conversion-table tbody tr:nth-child(even) {
    background: #f8fafc;
}

.conversion-table tbody tr:hover {
    background: #eef6ff;
}

.conversion-table tbody tr:last-child td {
    border-bottom: none;
}

.conversion-table td:last-child {
    font-weight: 600;
    color: #2563eb;
}

/* Mobile Design */
@media (max-width: 600px) {
    .time-conversion {
        padding: 16px;
        margin: 25px 0;
    }

    .time-conversion h2 {
        font-size: 20px;
    }

    .conversion-table {
        font-size: 13px;
        min-width: 420px;
    }

    .conversion-table th,
    .conversion-table td {
        padding: 12px;
    }
}



/* Feature update: theme, fullscreen, alarm, sharing and keyboard controls */
.header-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.theme-toggle{min-height:38px;padding:7px 12px;font-size:.88rem}
:root[data-theme="dark"]{--ink:#edf2f7;--muted:#a9b4c3;--line:#303b4b;--surface:#17202d;--wash:#0c121b;--brand:#78a0ff;--brand-dark:#5b83e8}
:root[data-theme="dark"] .site-header,:root[data-theme="dark"] .site-footer{background:#111a26;border-color:var(--line)}
:root[data-theme="dark"] .brand,:root[data-theme="dark"] .sidebar-links a,:root[data-theme="dark"] .timer-card,:root[data-theme="dark"] .quick-times a,:root[data-theme="dark"] .related-links a{color:var(--ink)}
:root[data-theme="dark"] .brand-mark,:root[data-theme="dark"] .card-time{background:#243654;color:#a9c1ff}
:root[data-theme="dark"] .timer-card,:root[data-theme="dark"] .button,:root[data-theme="dark"] .quick-times a,:root[data-theme="dark"] .related-links a{background:#1d2938;border-color:#39475a;color:var(--ink)}
:root[data-theme="dark"] .button.primary{background:#3868d8;border-color:#3868d8;color:#fff}
:root[data-theme="dark"] .sidebar-note{background:#1b2b45;border-color:#344a70}:root[data-theme="dark"] .sidebar-note p,:root[data-theme="dark"] .content-article p,:root[data-theme="dark"] .content-article li{color:#c0cad7}
:root[data-theme="dark"] .timer-progress{background:#303b4b}:root[data-theme="dark"] .time-conversion{background:#17202d;border-color:#303b4b}:root[data-theme="dark"] .time-conversion h2,:root[data-theme="dark"] .conversion-table th,:root[data-theme="dark"] .conversion-table td{color:#e7edf5}:root[data-theme="dark"] .conversion-table th,:root[data-theme="dark"] .conversion-table tbody tr:nth-child(even){background:#202c3b}:root[data-theme="dark"] .conversion-table-wrap{border-color:#39475a}
.timer-options{display:flex;align-items:end;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:16px}.option-control{display:flex;flex-direction:column;gap:5px;text-align:left;color:var(--muted);font-size:.84rem;font-weight:700}.option-control select{min-height:42px;min-width:155px;padding:8px 11px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font:inherit}.share-panel{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin:14px auto 0;padding:12px;background:var(--wash);border:1px solid var(--line);border-radius:12px}.share-label{width:100%;font-size:.86rem;color:var(--muted);font-weight:700}.share-link{border:1px solid var(--line);border-radius:9px;padding:8px 12px;background:var(--surface);color:var(--ink);font:inherit;font-size:.88rem;font-weight:650;cursor:pointer}.share-link:hover{border-color:var(--brand);color:var(--brand)}.keyboard-hint{margin:12px 0 0;color:var(--muted);font-size:.8rem}.timer-panel:fullscreen{display:flex;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;max-width:none;padding:4vw;background:var(--wash);border:0;border-radius:0}.timer-panel:fullscreen .timer-display{font-size:clamp(5rem,18vw,15rem)}.timer-panel:fullscreen .timer-progress{width:min(70vw,900px)}.timer-panel:fullscreen .keyboard-hint{font-size:1rem}
[hidden]{display:none!important}
@media(max-width:680px){.header-actions{width:100%;justify-content:space-between}.top-nav{gap:12px}.timer-options{align-items:stretch}.option-control{width:100%}.option-control select{width:100%}.timer-options>.button{flex:1}.keyboard-hint{line-height:1.5}}


.tool-panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px;text-align:center}
.tool-display{font-size:clamp(3rem,10vw,6rem);font-weight:850;letter-spacing:-.055em;font-variant-numeric:tabular-nums;line-height:1.15;margin:18px 0}
.tool-controls,.tool-options,.preset-row,.social-row{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;margin:14px 0}
.tool-fields{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:18px 0}
.tool-fields label,.tool-options label{display:grid;gap:5px;text-align:left;color:var(--muted);font-size:.9rem;font-weight:650}
.tool-fields input,.tool-fields select,.tool-options select,.tool-options input{width:100%;min-width:88px;padding:10px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink);font:inherit}
.tool-status{min-height:24px;color:var(--muted)}
.tool-progress{height:9px;background:var(--line);border-radius:99px;overflow:hidden;max-width:650px;margin:16px auto}
.tool-progress>div{height:100%;width:0;background:var(--brand);transition:width .2s}
.tool-note{font-size:.9rem;color:var(--muted)}
.tool-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin:18px 0}
.tool-card{display:block;padding:17px;border:1px solid var(--line);border-radius:13px;background:var(--surface);color:var(--ink);text-decoration:none}
.tool-card:hover{border-color:var(--brand)}
.tool-card strong{display:block;margin-bottom:5px}
.visual-face{width:min(76vw,420px);height:min(76vw,420px);border-radius:50%;margin:18px auto;background:conic-gradient(var(--brand) 0deg,#e8edf5 0deg);display:grid;place-items:center}
.visual-face>span{width:82%;height:82%;border-radius:50%;background:var(--surface);display:grid;place-items:center;font-size:clamp(2.7rem,8vw,5rem);font-weight:850;font-variant-numeric:tabular-nums}
.lap-list{max-width:500px;margin:18px auto;text-align:left;padding-left:24px}
.round-state{font-size:1rem;font-weight:750;color:var(--brand)}
.tool-panel:fullscreen{background:var(--wash);display:grid;align-content:center;padding:5vw}
@media(max-width:600px){.tool-panel{padding:18px}.tool-display{font-size:clamp(2.7rem,13vw,4.5rem)}}