:root {
    --bg: #f6f5f2;
    --surface: #ffffff;
    --border: #e5e2dc;
    --border-strong: #c8c4bd;
    --text: #1a1815;
    --muted: #6b665f;
    --accent: #f4b81a;          /* boxes & glue logo yellow */
    --accent-strong: #c89107;
    --accent-soft: #fdf3d2;
    --accent-ring: rgb(244 184 26 / 0.35);
    --row-hover: #f0eee9;
    --danger: #b03a2e;
    --radius: 6px;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.04), 0 4px 14px rgb(0 0 0 / 0.05);
}

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

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 15px;
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 2.25rem 1.25rem 4rem;
}

header { margin-bottom: 1.75rem; }

.logo {
    display: block;
    height: 44px;
    width: auto;
    margin-bottom: 0.4rem;
}

.tagline {
    margin: 0 0 0.5rem;
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0.01em;
}

.repo-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
}
.repo-link:hover { color: var(--text); }
.repo-link img { height: 18px; width: auto; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.range-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.range-row > label {
    font-weight: 500;
    color: var(--muted);
    white-space: nowrap;
    min-width: 9rem;
}
.range-row input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}
.range-row .value {
    font-variant-numeric: tabular-nums;
    min-width: 4.5ch;
    text-align: right;
    font-weight: 500;
}

.fields {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.85rem 1rem;
}

.field label {
    display: block;
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
}

.field input[type="number"],
textarea {
    width: 100%;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: var(--surface);
    font: inherit;
    color: var(--text);
    transition: border-color 0.12s, box-shadow 0.12s;
}
.field input[type="number"] { font-variant-numeric: tabular-nums; }

.field input[type="number"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-strong);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

.input-unit {
    position: relative;
}
.input-unit input[type="number"] {
    padding-right: 2rem;
    appearance: textfield;             /* Firefox */
    -moz-appearance: textfield;
}
.input-unit input[type="number"]::-webkit-outer-spin-button,
.input-unit input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.input-unit .unit {
    position: absolute;
    right: 0.6rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted);
    font-size: 0.85rem;
    pointer-events: none;
    font-variant-numeric: tabular-nums;
}

.toggles {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem 1.75rem;
}
.toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}
.toggle input {
    accent-color: var(--accent);
    width: 1.05rem;
    height: 1.05rem;
    margin: 0;
}

textarea {
    resize: vertical;
    min-height: 4.5rem;
    font-family: inherit;
}

.canvas-wrap {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin-bottom: 1rem;
    overflow: auto;
    box-shadow: var(--shadow);
}
canvas { display: block; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
th, td {
    padding: 0.45rem 0.65rem;
    text-align: right;
    font-variant-numeric: tabular-nums;
}
th {
    color: var(--muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-strong);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.74rem;
}
tbody tr + tr td { border-top: 1px solid var(--border); }
tbody tr:hover { background: var(--row-hover); }

.actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 0.5rem;
}

.btn-reset {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius);
    font: inherit;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.btn-reset:hover {
    background: var(--danger);
    color: #fff;
}
.btn-reset:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgb(176 58 46 / 0.2);
}

@media (max-width: 768px) {
    .range-row {
        display: grid;
        grid-template-columns: 1fr auto;
        column-gap: 0.5rem;
        row-gap: 0.35rem;
        align-items: center;
    }
    .range-row > label {
        min-width: 0;
        grid-row: 1;
        grid-column: 1;
    }
    .range-row .value {
        grid-row: 1;
        grid-column: 2;
    }
    .range-row input[type="range"] {
        grid-row: 2;
        grid-column: 1 / -1;
    }
}