* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-top: #0b0d1a;
    --bg-bottom: #161a2e;
    --panel: #1c2138;
    --panel-2: #232a47;
    --text: #e8ecf8;
    --text-sub: #9aa3c4;
    --accent: #5b8cff;
    --flash: #ff5a5a;
    --good: #4ade80;
    --border: #2c3354;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(160deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
    color: var(--text);
    min-height: 100vh;
    padding: 32px 20px;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 1000px;
}

header {
    text-align: center;
    margin-bottom: 28px;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #8fb4ff, #c9b3ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-sub);
    font-size: 1rem;
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.5;
}

.layout {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

/* ---- Scene ---- */
.scene-panel {
    flex: 0 0 auto;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

#scene {
    display: block;
    border-radius: 10px;
    cursor: pointer;
}

/* ---- Side panel ---- */
.side-panel {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}

.clock-box {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 20px;
    text-align: center;
}

.clock-label {
    display: block;
    color: var(--text-sub);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.clock {
    font-variant-numeric: tabular-nums;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.clock .unit {
    font-size: 1.2rem;
    color: var(--text-sub);
    margin-left: 4px;
}

.clock.flash {
    color: var(--flash);
}

.instruction {
    background: var(--panel-2);
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--text-sub);
    font-size: 0.95rem;
    line-height: 1.45;
    text-align: center;
}

.instruction strong { color: var(--text); }

.status-row {
    display: flex;
    gap: 12px;
}

.status {
    flex: 1;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    text-align: center;
}

.status-label {
    display: block;
    color: var(--text-sub);
    font-size: 0.75rem;
    margin-bottom: 4px;
}

.status-value {
    font-size: 1.3rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

/* ---- Controls ---- */
.controls {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
}

.speed-control {
    display: block;
    font-size: 0.9rem;
    color: var(--text-sub);
    margin-bottom: 6px;
}

.speed-control input[type="range"] {
    width: 100%;
    margin-top: 8px;
    accent-color: var(--accent);
}

#speedLabel { color: var(--text); font-weight: 600; }

.speed-hint {
    font-size: 0.78rem;
    color: var(--text-sub);
    margin-bottom: 12px;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-sub);
    cursor: pointer;
    margin-bottom: 12px;
}

.toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

.buttons {
    display: flex;
    gap: 10px;
}

.btn {
    flex: 1;
    padding: 10px 14px;
    border: none;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, background 0.2s, opacity 0.2s;
}

.btn:active { transform: scale(0.97); }

.btn-secondary {
    background: var(--panel-2);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) { background: #2c355a; }

.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---- Data table ---- */
.data-table-wrap {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    max-height: 220px;
    overflow-y: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    font-variant-numeric: tabular-nums;
}

.data-table th, .data-table td {
    padding: 7px 10px;
    text-align: right;
    border-bottom: 1px solid var(--border);
}

.data-table th:first-child, .data-table td:first-child { text-align: left; }

.data-table thead th {
    position: sticky;
    top: 0;
    background: var(--panel-2);
    color: var(--text-sub);
    font-weight: 600;
    font-size: 0.78rem;
}

.data-table tbody tr:last-child td { border-bottom: none; }
.data-table .delta-pos { color: var(--flash); }

/* ---- Results ---- */
.results {
    margin-top: 28px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
}

.results.hidden { display: none; }

.results h2 {
    font-size: 1.4rem;
    margin-bottom: 18px;
    text-align: center;
}

.estimate-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 22px;
}

.estimate {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 22px;
    text-align: center;
    min-width: 170px;
}

.estimate-label {
    display: block;
    color: var(--text-sub);
    font-size: 0.78rem;
    margin-bottom: 6px;
}

.estimate-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--good);
    font-variant-numeric: tabular-nums;
}

.chart-wrap {
    position: relative;
    height: 420px;
}

.results-note {
    margin-top: 16px;
    color: var(--text-sub);
    font-size: 0.9rem;
    line-height: 1.55;
    text-align: center;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 760px) {
    .layout { flex-direction: column; align-items: stretch; }
    .scene-panel { align-self: center; }
}