:root {
    --track: #122040;
    --track-2: #0c1730;
    --paper: #F4F2EC;
    --line: rgba(244, 242, 236, 0.14);
    --line-strong: rgba(244, 242, 236, 0.28);
    --amber: #FFB020;
    --flag: #E24A3B;
    --mint: #5FC9A8;
    --ink: #0c1730;
    --muted: #9AA6C0;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--track);
    background-image: radial-gradient(ellipse at top left, rgba(255, 255, 255, 0.05), transparent 55%), repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 96px);
    color: var(--paper);
    font-family: 'Roboto Mono', monospace;
    min-height: 100vh;
    padding: 28px 16px 60px;
}

.wrap {
    max-width: 880px;
    margin: 0 auto;
}

/* Header — Lane Markers */
header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    border-bottom: 3px solid var(--paper);
    padding-bottom: 14px;
    margin-bottom: 22px;
    flex-wrap: wrap;
    gap: 10px;
}

.h-title {
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    font-size: clamp(30px, 6vw, 46px);
    letter-spacing: 0.5px;
    line-height: 0.95;
}

.h-title span {
    color: var(--amber);
}

.h-sub {
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.06em;
    max-width: 260px;
    text-align: right;
}

/* Tabs — Bib-Style Toggle */
.tabs {
    display: flex;
    gap: 2px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab {
    font-family: 'Oswald', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.03em;
    padding: 10px 16px;
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--line-strong);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.tab:hover {
    color: var(--paper);
}

.tab.active {
    background: var(--paper);
    color: var(--ink);
    border-color: var(--paper);
}

.panel {
    display: none;
}

.panel.active {
    display: block;
    animation: fade 0.25s ease;
}

@keyframes fade {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    border: 1px solid var(--line-strong);
    padding: 20px;
    margin-bottom: 16px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent);
}

.card-title {
    font-family: 'Oswald', sans-serif;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--amber);
    margin: 0 0 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-title::before {
    content: '';
    width: 16px;
    height: 2px;
    background: var(--amber);
    display: inline-block;
}

.row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.field {
    flex: 1;
    min-width: 130px;
}

label {
    display: block;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

input[type=text],
input[type=number],
select {
    width: 100%;
    background: var(--track-2);
    border: 1px solid var(--line-strong);
    color: var(--paper);
    padding: 10px 10px;
    font-family: 'Roboto Mono', monospace;
    font-size: 15px;
}

input:focus,
select:focus {
    outline: 2px solid var(--amber);
    outline-offset: 1px;
}

.segmented {
    display: flex;
    border: 1px solid var(--line-strong);
}

.segmented button {
    flex: 1;
    background: transparent;
    color: var(--muted);
    border: none;
    padding: 9px 8px;
    font-family: 'Roboto Mono', monospace;
    font-size: 13px;
    cursor: pointer;
    border-right: 1px solid var(--line-strong);
}

.segmented button:last-child {
    border-right: none;
}

.segmented button.active {
    background: var(--amber);
    color: var(--ink);
    font-weight: 600;
}

.btn {
    font-family: 'Oswald', sans-serif;
    font-weight: 600;
    letter-spacing: 0.04em;
    background: var(--amber);
    color: var(--ink);
    border: none;
    padding: 12px 20px;
    font-size: 14px;
    cursor: pointer;
    text-transform: uppercase;
}

.btn:hover {
    background: #ffc451;
}

.btn.secondary {
    background: transparent;
    color: var(--paper);
    border: 1px solid var(--line-strong);
}

.btn.secondary:hover {
    border-color: var(--paper);
}

/* Big Readout */
.readout {
    display: flex;
    gap: 0;
    border: 1px solid var(--line-strong);
    margin-top: 4px;
    flex-wrap: wrap;
}

    .readout .cell {
        flex: 1;
        min-width: 140px;
        padding: 16px 18px;
        border-right: 1px solid var(--line-strong);
    }

    .readout .cell:last-child {
        border-right: none;
    }

    .readout .cell .num {
        font-family: 'Oswald', sans-serif;
        font-weight: 700;
        font-size: clamp(24px, 4vw, 34px);
        color: var(--paper);
        line-height: 1;
    }

    .readout .cell.hot .num {
        color: var(--amber);
    }

    .readout .cell .lbl {
        font-size: 11px;
        color: var(--muted);
        letter-spacing: 0.05em;
        margin-top: 6px;
    }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin-top: 6px;
}

th {
    text-align: left;
    font-family: 'Oswald', sans-serif;
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 8px 10px;
    border-bottom: 1px solid var(--line-strong);
}

td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--line);
}

tr.marker td {
    color: var(--amber);
    font-weight: 600;
}

tfoot tr.total-row td {
    border-top: 2px solid var(--paper);
    border-bottom: none;
    padding-top: 12px;
}

.note {
    font-size: 12px;
    color: var(--muted);
    margin-top: 10px;
    line-height: 1.5;
}

.actual-input {
    width: 90px;
    background: var(--track-2);
    border: 1px solid var(--line-strong);
    color: var(--paper);
    padding: 6px 8px;
    font-family: 'Roboto Mono', monospace;
    font-size: 13px;
}

.actual-input:focus {
    outline: 2px solid var(--amber);
    outline-offset: 1px;
}

.diff-ahead {
    color: var(--mint);
    font-weight: 600;
}

.diff-behind {
    color: var(--flag);
    font-weight: 600;
}

.diff-even {
    color: var(--muted);
}

.hr-zones {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 6px;
}

.hr-zone {
    border: 1px solid var(--line-strong);
    padding: 10px 12px;
}

.hr-zone .z-name {
    font-family: 'Oswald', sans-serif;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.hr-zone .z-pace {
    font-size: 16px;
    color: var(--amber);
    margin-top: 4px;
}

/* Pace Band */
.band {
    background: var(--paper);
    color: var(--ink);
    padding: 22px;
    border: 2px dashed var(--ink);
}

.band-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 2px solid var(--ink);
    padding-bottom: 10px;
    margin-bottom: 10px;
}

.band-head .bt {
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    font-size: 22px;
}

.band-head .bs {
    font-size: 12px;
    color: #555;
}

.band table {
    font-size: 12px;
}

.band th,
.band td {
    border-color: #ccc;
    color: var(--ink);
}

.band th {
    color: #555;
}

footer {
    margin-top: 26px;
    text-align: center;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.04em;
}

@media print {
    body * {
        visibility: hidden;
    }

    #printBand,
    #printBand * {
        visibility: visible;
    }

    #printBand {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
    }
}