/* Shared styles for the expertv2 preference pages (settings.php, colors.php). */
:root { --switch-on: var(--brand); --on-brand: #031018; --tap: 44px; }
html[data-theme="light"] { --on-brand: #ffffff; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-accent), var(--bg);
    color: var(--text);
    font: 15px/1.45 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    overflow-x: hidden;
    padding-bottom: calc(76px + env(safe-area-inset-bottom));
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.page-shell { width: min(100% - 32px, 1080px); margin: 0 auto; }

/* Header + tabs */
.topbar {
    position: sticky; top: 0; z-index: 50;
    background: var(--surface-overlay);
    border-bottom: 1px solid var(--border);
    -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
    padding-top: env(safe-area-inset-top);
}
.topbar-inner { display: flex; align-items: center; gap: 16px; padding: 10px 0 8px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; flex: 1 1 auto; }
.brand-logo { height: 30px; width: auto; display: block; }
.brand h1 { margin: 0; font-size: 1.15rem; font-weight: 700; color: var(--text-strong); white-space: nowrap; }
.top-links { display: flex; gap: 6px; }
.top-link {
    display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px;
    border-radius: 10px; border: 1px solid var(--control-border); background: var(--control-bg);
    color: var(--muted-strong); font-size: .9rem; font-weight: 600;
}
.top-link:hover { border-color: var(--control-border-strong); color: var(--text-strong); }
.top-link.is-active { border-color: var(--control-border-strong); background: var(--brand-soft); color: var(--text-strong); }
/* Panels and cards */
main { padding: 18px 0 8px; }
.panel[hidden] { display: none; }
.panel { display: grid; gap: 14px; }
.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
    padding: 16px 18px; box-shadow: var(--shadow-soft);
}
.card h2, .card-summary-title { margin: 0; font-size: 1.02rem; font-weight: 700; color: var(--text-strong); }
.card-intro { margin: 4px 0 12px; color: var(--muted); font-size: .9rem; }
.card h2 + .setting-list { margin-top: 8px; }
.card h3 { margin: 18px 0 2px; font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
details.card > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 12px; min-height: 28px; }
details.card > summary::-webkit-details-marker { display: none; }
details.card > summary::after {
    content: ""; flex: 0 0 auto; width: 9px; height: 9px; margin-left: auto;
    border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted);
    transform: rotate(45deg) translateY(-3px); transition: transform .15s;
}
details.card[open] > summary::after { transform: rotate(225deg) translate(-2px, -1px); }
.card-summary-text { display: grid; gap: 2px; min-width: 0; }
.card-summary-meta { color: var(--muted); font-size: .88rem; }
details.card[open] > summary { margin-bottom: 12px; }

/* Setting row with switch */
.setting-list { display: grid; }
.setting {
    display: flex; align-items: center; gap: 16px; padding: 12px 0;
    border-top: 1px solid var(--border); cursor: pointer;
}
.setting-list > .setting:first-child, .channel-grid > .setting:nth-child(-n+2) { border-top: 0; padding-top: 4px; }
.setting-text { display: grid; gap: 2px; min-width: 0; flex: 1 1 auto; }
.setting-label { font-weight: 600; color: var(--text-strong); }
.setting-desc, .setting-more { color: var(--muted); font-size: .88rem; }
.setting-more { color: var(--field-muted); }
.setting-badge {
    display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px;
    background: var(--brand-soft); color: var(--brand-strong); font-size: .72rem; font-weight: 600; vertical-align: 2px;
}
.switch {
    position: relative; flex: 0 0 auto; width: 52px; height: var(--tap);
    border: 0; background: none; padding: 0;
}
.switch::before {
    content: ""; position: absolute; left: 4px; right: 4px; top: 50%; height: 26px; margin-top: -13px;
    border-radius: 999px; background: var(--border-strong); border: 1px solid var(--border-strong);
    transition: background .15s, border-color .15s;
}
.switch::after {
    content: ""; position: absolute; left: 7px; top: 50%; width: 20px; height: 20px; margin-top: -10px;
    border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.35);
    transition: transform .15s;
}
.switch[aria-pressed="true"]::before { background: var(--switch-on); border-color: var(--switch-on); }
.switch[aria-pressed="true"]::after { transform: translateX(18px); }


/* Fields */
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 18px; }
.field { display: grid; gap: 6px; align-content: start; min-width: 0; }
.field.full { grid-column: 1 / -1; }
.field label, .field-label { font-weight: 600; color: var(--text-strong); font-size: .92rem; }
.field-note { margin: 0; color: var(--muted); font-size: .84rem; }
input[type="text"], input[type="number"], select {
    width: 100%; min-height: var(--tap); padding: 8px 12px; border-radius: 10px;
    border: 1px solid var(--field-border); background: var(--field-bg); color: var(--text);
    font-size: 16px;
}
input::placeholder { color: var(--field-placeholder); }
input:hover, select:hover { border-color: var(--field-border-hover); }
select:disabled, button:disabled { opacity: .45; cursor: not-allowed; }
.inline-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.button {
    display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 16px;
    border-radius: 10px; border: 1px solid var(--control-border); background: var(--control-bg);
    color: var(--text); font-weight: 600; font-size: .92rem;
}
.button:hover:not(:disabled) { border-color: var(--control-border-strong); }
.button-primary { background: var(--brand); border-color: var(--brand); color: var(--on-brand); }
.button-primary:hover:not(:disabled) { filter: brightness(1.08); }
.volume-row { display: flex; align-items: center; gap: 8px; }
.volume-row input { max-width: 110px; }

/* Save bar */
.save-bar {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    background: var(--surface-overlay); border-top: 1px solid var(--border);
    -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
    padding: 10px 0 calc(10px + env(safe-area-inset-bottom));
}
.save-bar-inner { display: flex; align-items: center; gap: 10px; }
.save-status { flex: 1 1 auto; color: var(--muted); font-size: .88rem; min-width: 0; }
.save-status.is-dirty { color: var(--warning); font-weight: 600; }
.save-bar .button { min-height: var(--tap); }
.save-bar .button-primary { min-width: 140px; }

@media (max-width: 767px) {
    .page-shell { width: calc(100% - 24px); }
    .topbar-inner { flex-wrap: wrap; gap: 8px 12px; }
    .brand-logo { height: 26px; }
    .brand h1 { font-size: 1.02rem; }
    .top-links { width: 100%; }
    .top-link { flex: 1 1 0; justify-content: center; padding: 0 6px; }
    main { padding-top: 12px; }
    .card { padding: 14px; border-radius: 12px; }
    .field-grid { grid-template-columns: minmax(0, 1fr); }
    .save-bar .button { padding: 0 12px; }
    .save-bar .button-primary { min-width: 0; flex: 0 0 auto; }
}