:root {
    color-scheme: light;
    --bg: #f3efe6;
    --ink: #1c1915;
    --muted: #5c564c;
    --card: #fffdf8;
    --line: #e3d9c8;
    --accent: #0f5c56;
    --accent-ink: #f7fffd;
    --danger: #8d2b2b;
    --ok: #1f6b3a;
    --ad: #f7f1e4;
    --shadow: 0 16px 40px rgba(28, 25, 21, 0.06);
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #12171b;
    --ink: #f3efe6;
    --muted: #c3bbb0;
    --card: #1c242b;
    --line: #31404a;
    --accent: #8fd0c8;
    --accent-ink: #10211f;
    --danger: #ffb4b4;
    --ok: #b7e4c7;
    --ad: #182027;
    --shadow: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "Segoe UI", "Nirmala UI", "Noto Sans Bengali", "Kohinoor Bangla", sans-serif;
    line-height: 1.55;
    overflow-x: hidden;
}
a { color: var(--accent); }
a:hover { text-decoration: none; }
img, svg, iframe { max-width: 100%; height: auto; }
.skip {
    position: absolute;
    left: 12px;
    top: -40px;
    background: var(--accent);
    color: var(--accent-ink);
    padding: 8px 12px;
}
.skip:focus { top: 12px; }
.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }
.site-header, .site-footer { border-bottom: 1px solid var(--line); }
.site-footer { border-bottom: 0; border-top: 1px solid var(--line); padding: 28px 0 40px; }
.header-row, .footer-row, .toolbar { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; display: flex; gap: 10px; align-items: center; }
.brand img { width: 36px; height: 36px; object-fit: contain; }
.nav { display: flex; gap: 14px; flex-wrap: wrap; }
.nav a { color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 4px; }
.main { padding: 28px 0 64px; }
h1 { font-size: clamp(1.7rem, 4vw, 2.6rem); line-height: 1.15; margin: 0 0 12px; }
h2 { font-size: 1.3rem; }
.lede { font-size: 1.05rem; max-width: 68ch; color: var(--muted); }
.card, .panel {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 18px;
}
.finder { margin: 22px 0; }
label { display: block; font-weight: 650; margin-bottom: 8px; }
textarea, input[type="text"], input[type="email"], input[type="password"], input[type="url"], input[type="number"], select {
    width: 100%;
    min-height: 48px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: var(--bg);
    color: var(--ink);
    padding: 12px 14px;
    font: inherit;
}
textarea { min-height: 140px; }
.finder textarea { min-height: 92px; font-size: 1.05rem; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.button, button {
    appearance: none;
    border: 0;
    border-radius: 999px;
    min-height: 48px;
    padding: 0 18px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.button-primary, button[type="submit"].primary { background: var(--accent); color: var(--accent-ink); }
.button-quiet { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.icon-button { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.notice, .error, .success { border-radius: 14px; padding: 12px 14px; margin: 12px 0; }
.notice { background: var(--ad); }
.error { background: color-mix(in srgb, var(--danger) 12%, var(--card)); color: var(--danger); }
.success { background: color-mix(in srgb, var(--ok) 14%, var(--card)); }
.steps { margin: 0 0 18px; padding-left: 1.2rem; }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 12px; color: var(--muted); }
.source-list, .format-list, .stack { display: grid; gap: 12px; }
.format-list { margin: 14px 0; }
.format-option { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; }
.format-tabs { display: grid; gap: 12px; }
.format-tabs > input { position: absolute; opacity: 0; pointer-events: none; }
.format-tabs > label { display: inline-block; margin-right: 8px; padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; }
.format-tabs > input:checked + label { background: var(--accent); color: var(--accent-ink); }
.format-tabs > input:not(:checked) + label + .format-panel,
.format-panel { display: none; }
#tab-video:checked ~ .format-panel[data-tab="video"],
#tab-audio:checked ~ .format-panel[data-tab="audio"],
#tab-other:checked ~ .format-panel[data-tab="other"] { display: grid; gap: 12px; }
.format-card dl { display: grid; gap: 6px; margin: 0; }
.format-card dl div { display: grid; grid-template-columns: 9rem 1fr; gap: 8px; }
.format-card dt { color: var(--muted); }
.format-card dd { margin: 0; }
.cap-list { margin: 0; padding-left: 1.1rem; }
.meta { color: var(--muted); font-size: 0.95rem; }
.thumb { width: min(320px, 100%); border-radius: 12px; background: var(--bg); }
.ad-slot { margin-top: 28px; border: 1px dashed var(--line); background: var(--ad); border-radius: 16px; padding: 12px; }
.ad-label { margin: 0 0 8px; font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.ad-frame { width: 100%; min-height: 90px; border: 0; background: transparent; }
.banner { position: sticky; bottom: 0; background: var(--card); border-top: 1px solid var(--line); padding: 12px 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.admin { display: grid; grid-template-columns: 220px 1fr; gap: 18px; }
.side a { display: block; padding: 8px 0; color: var(--ink); text-decoration: none; }
.status-pill { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; }
@media (max-width: 800px) {
    .admin { grid-template-columns: 1fr; }
}
@media (max-width: 360px) {
    .wrap { width: calc(100% - 20px); }
    h1 { font-size: 1.55rem; }
    .header-row, .actions, .format-option { display: grid; }
    .format-card dl div, .format-tabs > label { max-width: 100%; }
    .format-card dl div { grid-template-columns: 1fr; }
    .nav { gap: 8px; }
}