:root {
    color-scheme: light dark;
    --bg: #f6f6f8;
    --surface: #ffffff;
    --surface-2: #f0f0f4;
    --border: #e0e0e7;
    --text: #1c1c21;
    --muted: #6a6a76;
    --accent: #4f46e5;
    --accent-soft: #ecebff;
    --ok: #15803d;
    --ok-soft: #e7f6ec;
    --warn: #a35a00;
    --warn-soft: #fdf2df;
    --bad: #c02626;
    --bad-soft: #fde9e9;
    --sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --mono: ui-monospace, SFMono-Regular, 'Cascadia Mono', Menlo, Consolas, monospace;
    --radius: 10px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111114;
        --surface: #1a1a1f;
        --surface-2: #24242b;
        --border: #30303a;
        --text: #ececf1;
        --muted: #9b9ba8;
        --accent: #8d8cfa;
        --accent-soft: #26264a;
        --ok: #4ade80;
        --ok-soft: #14301f;
        --warn: #f5b942;
        --warn-soft: #36290f;
        --bad: #f87171;
        --bad-soft: #3a1818;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0 auto;
    max-width: 1120px;
    padding: 32px 16px 48px;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.5 var(--sans);
}

code, pre, td.num, td.name, .chain {
    font-family: var(--mono);
    font-size: 13px;
}

h1 {
    margin: 0 0 4px;
    font-size: 26px;
    letter-spacing: -0.01em;
}

h2 {
    margin: 32px 0 10px;
    font-size: 17px;
}

h3 {
    margin: 20px 0 6px;
    font-size: 15px;
}

.sub {
    color: var(--muted);
    font-size: 13px;
    font-weight: normal;
}

a {
    color: var(--accent);
}

button {
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
}

button:hover {
    border-color: var(--accent);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

[hidden] {
    display: none !important;
}

/* header */

.page-header p {
    margin: 0;
    color: var(--muted);
}

/* file picker */

.drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-top: 24px;
    padding: 36px 16px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    text-align: center;
    cursor: pointer;
    transition: border-color .15s, background .15s, padding .15s;
}

.drop:hover, .drop:focus-within, .dragging .drop {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.drop input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.drop-title {
    font-weight: 600;
}

.drop-hint {
    color: var(--muted);
    font-size: 13px;
}

.has-results .drop {
    padding: 14px 16px;
}

/* options */

.options {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 22px;
    margin: 24px 2px 0;
    color: var(--muted);
    font-size: 13px;
}

.options label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.options input[type=number] {
    width: 76px;
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font: 13px var(--mono);
}

.options input:disabled {
    opacity: .5;
}

.check input {
    margin: 0;
    accent-color: var(--accent);
}

.notice {
    margin: 16px 0 0;
    padding: 10px 14px;
    border-left: 3px solid var(--warn);
    border-radius: 0 var(--radius) var(--radius) 0;
    background: var(--warn-soft);
    font-size: 13px;
}

.notice strong {
    color: var(--warn);
}

.error {
    margin: 16px 0 0;
    padding: 12px 14px;
    border-radius: var(--radius);
    background: var(--bad-soft);
    color: var(--bad);
}

.intro {
    margin-top: 28px;
    color: var(--muted);
}

.intro h2 {
    color: var(--text);
}

.intro ul {
    margin: 0;
    padding-left: 20px;
}

.intro li + li {
    margin-top: 6px;
}

/* results */

.file-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 28px 0 16px;
}

.file-info {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 12px;
    min-width: 0;
}

.file-info strong {
    overflow-wrap: anywhere;
}

.file-info span {
    color: var(--muted);
    font-size: 13px;
}

.tabs {
    display: flex;
    gap: 2px;
    padding: 3px;
    border-radius: 9px;
    background: var(--surface-2);
}

.tabs button {
    border-color: transparent;
    background: none;
    color: var(--muted);
}

.tabs button[aria-selected=true] {
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 1px 2px rgb(0 0 0 / .12);
}

.summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

.card {
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.card-label {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.card-value {
    margin: 2px 0;
    font-size: 22px;
    font-weight: 650;
    font-variant-numeric: tabular-nums;
}

.card-note {
    color: var(--muted);
    font-size: 13px;
    overflow-wrap: anywhere;
}

.card.ok .card-value, .ok {
    color: var(--ok);
}

.card.warn .card-value, .warn {
    color: var(--warn);
}

.card.bad .card-value, .bad {
    color: var(--bad);
}

.warnings {
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
}

.warnings li {
    margin-top: 6px;
    padding: 10px 14px;
    border-radius: var(--radius);
    background: var(--warn-soft);
    color: var(--warn);
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 7px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

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

th {
    background: var(--surface-2);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

th.num, td.num, td.export {
    width: 1%;
    white-space: nowrap;
}

th.num, td.num {
    text-align: right;
}

td.num {
    font-variant-numeric: tabular-nums;
}

td.name {
    overflow-wrap: anywhere;
}

td.empty {
    color: var(--muted);
    font-family: var(--sans);
    text-align: center;
}

.usage {
    min-width: 96px;
}

.bar {
    height: 4px;
    margin-top: 4px;
    border-radius: 2px;
    background: var(--surface-2);
}

.bar div {
    height: 100%;
    border-radius: 2px;
    background: var(--accent);
}

.usage.warn .bar div {
    background: var(--warn);
}

.usage.bad .bar div {
    background: var(--bad);
}

.chain {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
}

.link {
    padding: 1px 7px;
    border-radius: 5px;
    background: var(--surface-2);
    overflow-wrap: anywhere;
}

.link small {
    margin-left: 5px;
    color: var(--muted);
}

.arrow {
    color: var(--muted);
}

.flag {
    display: inline-block;
    margin-left: 8px;
    padding: 0 6px;
    border-radius: 5px;
    background: var(--surface-2);
    color: var(--muted);
    font-family: var(--sans);
    font-size: 11px;
}

.flag.dynamic, .flag.indirect {
    background: var(--warn-soft);
    color: var(--warn);
}

.flag.recursive {
    background: var(--bad-soft);
    color: var(--bad);
}

/* stack size instructions */

.howto {
    margin-top: 24px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.notice + .howto {
    margin-top: 12px;
}

.howto h2 {
    margin: 0 0 6px;
}

.howto p {
    margin: 6px 0;
    color: var(--muted);
    font-size: 13px;
}

.howto-code {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px;
    margin: 12px 0;
}

.code-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 26px;
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 12px;
}

.code-head button {
    padding: 2px 10px;
    font-size: 12px;
}

.howto pre {
    margin: 0;
    padding: 10px 12px;
    overflow-x: auto;
    border-radius: 8px;
    background: var(--surface-2);
    line-height: 1.45;
}

#proposed-size {
    color: var(--accent);
    font-weight: 600;
}

/* explain */

.hint {
    margin: 0 0 8px;
    color: var(--muted);
    font-size: 13px;
}

.site {
    margin-top: 10px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.site h4 {
    margin: 0;
    font: 600 13px var(--mono);
    overflow-wrap: anywhere;
}

.site h4 span {
    margin-left: 10px;
    color: var(--muted);
    font: 13px var(--sans);
}

.site figure {
    display: inline-block;
    margin: 10px 24px 0 0;
    vertical-align: top;
}

.site figcaption {
    color: var(--muted);
    font-size: 12px;
}

.site pre {
    margin: 4px 0 0;
    color: var(--text);
}

/* text & JSON views */

.panel-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.panel-actions .sub {
    margin-right: auto;
}

.output {
    margin: 0;
    padding: 14px 16px;
    overflow: auto;
    max-height: 75vh;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    line-height: 1.45;
}

@media (max-width: 600px) {
    body {
        padding-top: 20px;
    }

    .card-value {
        font-size: 19px;
    }

    th, td {
        padding: 6px 8px;
    }

    .howto-code {
        grid-template-columns: minmax(0, 1fr);
    }

    /* call chain goes under the export name instead of a scrolled-away column */
    .entry-table thead {
        display: none;
    }

    .entry-table tr {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        border-bottom: 1px solid var(--border);
    }

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

    .entry-table td {
        width: auto;
        border-bottom: none;
    }

    .entry-table td:last-child {
        grid-column: 1 / -1;
        padding-top: 0;
    }
}