/* SPDX-License-Identifier: GPL-3.0-or-later
   Copyright (C) 2026 Benjamin Dehli */

:root {
    color-scheme: light dark;
    /* Section colours sampled from the Matriarch faceplate */
    --yellow: #eeed75; /* Arp/Seq */
    --blue: #99d0de; /* Oscillators */
    --green: #8ed483; /* Filters */
    --lavender: #d1abec; /* Stereo Delay */
    --orange: #fd8b56; /* lit Sync and Multi Trig buttons */
    --black: #1f1f1f; /* panel */
    --on-panel: #161616;
    --on-panel-muted: #3d3d3d;

    --bg: #f3f2ee;
    --surface: #ffffff;
    --text: #161616;
    --muted: #57534e;
    --border: #d9d6cf;
    --accent: #a3401a;
    --ok: #14532d;
    --warn: #6b3d00;
    --error: #9b1c1c;
    --focus: #1a5fb4;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121212;
        --surface: #1f1f1f;
        --text: #ececec;
        --muted: #a9a9a9;
        --border: #333333;
        --accent: #fd8b56;
        --focus: #8ab4f8;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font:
        16px/1.55 system-ui,
        -apple-system,
        "Segoe UI",
        Roboto,
        sans-serif;
}

.page {
    max-width: 44rem;
    margin: 0 auto;
    padding: 1.25rem 1.25rem 3rem;
}

/* ---- skip link, header ------------------------------------------------- */

.skip {
    position: absolute;
    left: -9999px;
    top: 0;
    padding: 0.6rem 1rem;
    background: var(--surface);
    border: 1px solid var(--accent);
    border-radius: 6px;
    color: var(--text);
}

.skip:focus {
    left: 1rem;
    top: 0.75rem;
    z-index: 10;
}

main:focus {
    outline: none;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding-bottom: 1rem;
    font-size: 0.95rem;
}

/* The four section colours of the faceplate, in panel order */
.stripe {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(
        to right,
        var(--yellow) 0 25%,
        var(--blue) 25% 50%,
        var(--green) 50% 75%,
        var(--lavender) 75%
    );
}

.site-header .home {
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.site-header nav ul {
    display: flex;
    gap: 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

/* ---- text -------------------------------------------------------------- */

h1 {
    font-size: 2rem;
    line-height: 1.2;
    margin: 2rem 0 0.5rem;
}

h2 {
    font-size: 1.35rem;
    line-height: 1.3;
    margin: 2.5rem 0 0.75rem;
}

h3 {
    font-size: 1.05rem;
    margin: 1.5rem 0 0.5rem;
}

p {
    margin: 0 0 0.75rem;
}

.lead {
    color: var(--muted);
    font-size: 1.1rem;
}

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

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.88em;
    overflow-wrap: anywhere;
}

.hint {
    color: var(--muted);
    font-size: 0.9rem;
    overflow-wrap: anywhere;
}

.notice {
    border-left: 4px solid var(--orange);
    background: var(--surface);
    padding: 0.75rem 1rem;
    border-radius: 0 8px 8px 0;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.table-wrap {
    overflow-x: auto;
    margin: 1rem 0;
}

table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.95rem;
}

th,
td {
    text-align: left;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

th {
    font-weight: 600;
    background: var(--lavender);
    color: var(--on-panel);
    padding-left: 0.75rem;
}

/* ---- links row (source, star, follow) ---------------------------------- */

.links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: 1.25rem 0 0;
    padding: 0;
    list-style: none;
}

.links a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font-size: 0.95rem;
    text-decoration: none;
}

.links a:hover {
    border-color: var(--orange);
    color: var(--text);
}

.links svg {
    width: 1rem;
    height: 1rem;
    fill: currentColor;
}

/* ---- patcher ----------------------------------------------------------- */

.step {
    display: inline-grid;
    place-items: center;
    flex: none;
    width: 1.8rem;
    height: 1.8rem;
    border-radius: 50%;
    background: var(--black);
    color: #ffffff;
    font-size: 0.9rem;
}

section.card {
    /* The panels are light in both themes, so form controls should be drawn light too */
    color-scheme: light;
    --panel: var(--surface);
    background: var(--panel);
    color: var(--on-panel);
    border-radius: 6px;
    padding: 1.25rem;
    margin: 1rem 0;
}

#patcher section.card:nth-child(1) {
    --panel: var(--yellow);
}

#patcher section.card:nth-child(2) {
    --panel: var(--blue);
}

#patcher section.card:nth-child(3) {
    --panel: var(--green);
}

section.card .hint {
    color: var(--on-panel-muted);
}

section.card a:not(.button) {
    color: var(--on-panel);
}

section.card h2 {
    font-size: 1.1rem;
    margin: 0 0 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

section.card[aria-disabled="true"] {
    opacity: 0.55;
}

.drop {
    display: block;
    border: 2px dashed rgba(0, 0, 0, 0.4);
    border-radius: 6px;
    padding: 1.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition:
        border-color 0.15s,
        background 0.15s;
}

.drop:hover,
.drop.dragging {
    border-color: var(--black);
    background: rgba(255, 255, 255, 0.35);
}

.drop:focus-within {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

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

.drop strong {
    text-decoration: underline;
}

.status {
    margin: 0.75rem 0 0;
    font-weight: 600;
}

.status:empty {
    display: none;
}

.status.ok {
    color: var(--ok);
}

.status.warn {
    color: var(--warn);
}

.status.error {
    color: var(--error);
}

fieldset {
    border: 0;
    margin: 0;
    padding: 0;
}

legend {
    font-weight: 600;
    margin-bottom: 0.35rem;
    padding: 0;
}

.option {
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
    padding: 0.45rem 0;
}

.option input[type="radio"] {
    margin-top: 0.3rem;
    accent-color: var(--black);
}

.option small {
    display: block;
    color: var(--on-panel-muted);
}

input[type="number"] {
    width: 5.5rem;
    font: inherit;
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--black);
    border-radius: 4px;
    background: #ffffff;
    color: var(--on-panel);
}

.button {
    display: inline-block;
    background: var(--orange);
    color: var(--on-panel);
    font-weight: 700;
    text-decoration: none;
    padding: 0.7rem 1.2rem;
    border-radius: 6px;
    box-shadow:
        0 0 0 2px var(--black),
        0 0 14px rgba(253, 139, 86, 0.55);
}

.button[aria-disabled="true"] {
    background: rgba(0, 0, 0, 0.12);
    color: var(--on-panel-muted);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.25);
    pointer-events: none;
}

ol.flash {
    padding-left: 1.3rem;
    margin: 0.5rem 0 0.75rem;
}

ol.flash li {
    margin: 0.2rem 0;
}

/* ---- questions --------------------------------------------------------- */

details {
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0;
}

details summary {
    cursor: pointer;
    font-weight: 600;
}

details p {
    margin: 0.5rem 0 0;
}

/* ---- footer ------------------------------------------------------------ */

footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
}

.maker {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.maker img {
    width: 84px;
    height: auto;
    flex: none;
}

.elsewhere {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.2rem;
    margin: 0 0 1rem;
    padding: 0;
    list-style: none;
}

noscript p {
    color: var(--error);
    font-weight: 600;
}

/* The dark-mode focus colour is too light on the pastel panels */
section.card :focus-visible,
section.card .drop:focus-within {
    outline-color: var(--black);
}

/* ---- figures ----------------------------------------------------------- */

figure {
    margin: 1.25rem 0 1.5rem;
}

figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
}

figcaption {
    margin-top: 0.5rem;
    color: var(--muted);
    font-size: 0.9rem;
}

/* ---- fix choices ------------------------------------------------------- */

.choice-label {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0.75rem 0 0;
}

#options fieldset + fieldset {
    margin-top: 1.25rem;
}

/* A fieldset's own top border runs through its legend, so the divider goes on the legend */
#options fieldset + fieldset legend {
    width: 100%;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.2);
}

legend .toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

legend .toggle input {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--black);
}