/* Mitti GO admin — the calm parent register (DESIGN_SYSTEM §1.3, §2): parent ground, white cards with a hairline,
   one action blue. */
:root {
    --ground: #F4F7FB;
    --card: #FFFFFF;
    --hairline: #E7EDF5;
    --divider: #EFF3F8;
    --ink: #12265C;
    --ink-2: #456080;
    --ink-3: #5A7290;
    --action: #1176E6;
    --action-ink: #FFFFFF;
    --focus: #1A8CFF;
    --selected: #EAF6FF;
    --success-bg: #E9F9F0;
    --success-line: #BCEBD2;
    --success-ink: #0B4B31;
    --error-bg: #FFF1F1;
    --error-ink: #A8262C;
    --error-fill: #C3363B;
    --amber-bg: #FFF6DF;
    --amber-line: #F0DCAC;
    --amber-ink: #3D2C00;
    --muted-bg: #FAFCFE;
    --brand: linear-gradient(90deg, #6FD94A, #17D3A7, #1A8CFF);
    color-scheme: light;
}

/* Dark: follows the system unless the viewer picked a theme (data-theme on <html>, set by /js/theme.js). */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --ground: #071A2E;
        --card: #0F2742;
        --hairline: #1E3A5C;
        --divider: #16304E;
        --ink: #EAF6FF;
        --ink-2: #9FC4DC;
        --ink-3: #8FA6C4;
        --action: #3D97FF;
        --focus: #3D97FF;
        --selected: #12305A;
        --success-bg: #123A2C;
        --success-line: #1E5A44;
        --success-ink: #57E0A4;
        --error-bg: #2A1520;
        --error-ink: #FFB3BC;
        --error-fill: #C3363B;
        --amber-bg: #4A3A12;
        --amber-line: #6B5520;
        --amber-ink: #FFD97A;
        --muted-bg: #0B2340;
        color-scheme: dark;
    }
}

:root[data-theme="dark"] {
    --ground: #071A2E;
    --card: #0F2742;
    --hairline: #1E3A5C;
    --divider: #16304E;
    --ink: #EAF6FF;
    --ink-2: #9FC4DC;
    --ink-3: #8FA6C4;
    --action: #3D97FF;
    --focus: #3D97FF;
    --selected: #12305A;
    --success-bg: #123A2C;
    --success-line: #1E5A44;
    --success-ink: #57E0A4;
    --error-bg: #2A1520;
    --error-ink: #FFB3BC;
    --error-fill: #C3363B;
    --amber-bg: #4A3A12;
    --amber-line: #6B5520;
    --amber-ink: #FFD97A;
    --muted-bg: #0B2340;
    color-scheme: dark;
}

:root[data-theme="light"] { color-scheme: light; }

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--ground);
    color: var(--ink);
    font: 600 15px/1.5 "Nunito", system-ui, sans-serif;
}

a { color: var(--action); font-weight: 800; text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Shell ---------------------------------------------------------------------------------------------------------- */

.shell { display: flex; min-height: 100vh; }

.side {
    width: 248px;
    flex: none;
    background: var(--card);
    border-right: 1px solid var(--hairline);
    padding: 22px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand { display: flex; align-items: center; gap: 10px; padding: 0 10px 18px; }
.brand-mark { width: 34px; height: 34px; border-radius: 12px; background: var(--brand); flex: none; }
.brand-name { font: 900 18px/1.1 "Nunito", sans-serif; }
.brand-sub { font: 700 12px/1.2 "Nunito", sans-serif; color: var(--ink-3); }

.nav-caption {
    font: 800 12px/1 "Nunito", sans-serif;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--ink-3);
    padding: 16px 12px 6px;
}

.nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 14px;
    color: var(--ink);
    font-weight: 800;
}

.nav a:hover { background: var(--ground); text-decoration: none; }
.nav a.active { background: var(--selected); color: var(--action); }

.side-foot { margin-top: auto; padding: 16px 12px 0; font-size: 13px; color: var(--ink-2); }
.side-foot form { margin-top: 8px; }

.main { flex: 1; min-width: 0; padding: 32px 40px 48px; }
.page { max-width: 1280px; }

h1 { font: 900 26px/1.2 "Nunito", sans-serif; margin: 0 0 6px; }
h2 { font: 900 18px/1.3 "Nunito", sans-serif; margin: 0 0 12px; }
.lead { color: var(--ink-2); margin: 0 0 24px; max-width: 680px; }

/* --- Cards, grids --------------------------------------------------------------------------------------------------- */

.card {
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 24px;
    padding: 22px 24px;
    margin-bottom: 18px;
}

.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); margin-bottom: 18px; }

.stat {
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 22px;
    padding: 18px 20px;
}

.stat-value { font: 900 28px/1.1 "Nunito", sans-serif; }
.stat-label { color: var(--ink-2); font-size: 13px; margin-top: 4px; }

meter, progress { width: 100%; height: 10px; margin-top: 10px; }

/* --- Rows ----------------------------------------------------------------------------------------------------------- */

.rows { display: flex; flex-direction: column; }

.row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-top: 1px solid var(--divider);
    flex-wrap: wrap;
}

.row:first-child { border-top: 0; }
.row.off { opacity: .55; }
.row-main { flex: 1; min-width: 200px; }
.row-title { font-weight: 800; }
.row-sub { color: var(--ink-2); font-size: 13px; overflow-wrap: anywhere; }
.row-actions { display: flex; gap: 6px; align-items: center; }
.row-actions form { margin: 0; }

.avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; background: var(--divider); flex: none; }
.row-index { min-width: 32px; text-align: right; color: var(--ink-3); font-weight: 700; font-variant-numeric: tabular-nums; flex: none; }
.pos { width: 28px; text-align: center; color: var(--ink-3); font-weight: 900; }

/* --- Forms ---------------------------------------------------------------------------------------------------------- */

label { display: block; font-weight: 800; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }

input[type=text], input[type=search], input[type=password], input[type=url], input[type=date], input[type=number], textarea, select {
    width: 100%;
    font: 700 15px/1.4 "Nunito", sans-serif;
    color: var(--ink);
    background: var(--card);
    border: 1.5px solid var(--hairline);
    border-radius: 14px;
    padding: 10px 12px;
}

textarea { min-height: 76px; resize: vertical; }

input:focus, textarea:focus, select:focus, button:focus-visible, a:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 1px;
}

.form-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.form-line { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.form-line > .grow { flex: 1; min-width: 220px; }
.field { margin-bottom: 14px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 800; color: var(--ink); margin: 0; }
.check input { width: 18px; height: 18px; }

button, .button {
    font: 800 15px/1 "Nunito", sans-serif;
    border: 0;
    border-radius: 14px;
    padding: 12px 18px;
    cursor: pointer;
    background: var(--action);
    color: var(--action-ink);
    min-height: 44px;
    white-space: nowrap;
}

button.secondary { background: var(--ground); color: var(--ink); border: 1px solid var(--hairline); }
button.small { padding: 8px 12px; min-height: 36px; font-size: 13px; }
button.danger { background: transparent; color: var(--error-ink); border: 1px solid var(--hairline); }
button.link { background: none; color: var(--action); padding: 0; min-height: 0; }
button:disabled { opacity: .45; cursor: default; }

/* --- Messages, pills ------------------------------------------------------------------------------------------------ */

.flash { border-radius: 16px; padding: 12px 16px; margin-bottom: 18px; font-weight: 800; border: 1px solid; }
.flash.ok { background: var(--success-bg); border-color: var(--success-line); color: var(--success-ink); }
.flash.err { background: var(--error-bg); border-color: var(--error-ink); color: var(--error-ink); }
.flash.info { background: var(--selected); border-color: var(--hairline); color: var(--ink); }
.note { background: var(--muted-bg); border: 1px solid var(--hairline); border-radius: 16px; padding: 12px 16px; color: var(--ink-2); font-size: 14px; }
.note.amber { background: var(--amber-bg); border-color: var(--amber-line); color: var(--amber-ink); }

.pill { display: inline-block; border-radius: 999px; padding: 3px 10px; font: 800 12px/1.4 "Nunito", sans-serif; background: var(--divider); color: var(--ink-2); }
.pill.on { background: var(--success-bg); color: var(--success-ink); }
.pill.amber { background: var(--amber-bg); color: var(--amber-ink); box-shadow: inset 0 0 0 1px var(--amber-line); cursor: help; }

.tabs { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.tabs a { padding: 9px 16px; border-radius: 999px; background: var(--card); border: 1px solid var(--hairline); color: var(--ink); }
.tabs a.active { background: var(--action); border-color: var(--action); color: var(--action-ink); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; color: var(--ink-3); font: 800 12px/1 "Nunito", sans-serif; text-transform: uppercase; letter-spacing: .04em; padding: 0 8px 10px; }
td { padding: 10px 8px; border-top: 1px solid var(--divider); vertical-align: top; }
.muted { color: var(--ink-3); }

/* --- Login ---------------------------------------------------------------------------------------------------------- */

.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.login { width: 100%; max-width: 400px; }
.login .brand { justify-content: center; padding-bottom: 22px; }
.login button { width: 100%; margin-top: 6px; }
.login-foot { text-align: center; color: var(--ink-3); font-size: 13px; margin-top: 14px; }

/* --- Narrow windows ------------------------------------------------------------------------------------------------- */

@media (max-width: 760px) {
    .shell { flex-direction: column; }
    .side { width: auto; border-right: 0; border-bottom: 1px solid var(--hairline); padding: 14px 16px; }
    .nav { display: flex; flex-wrap: wrap; gap: 4px; }
    .nav-caption { display: none; }
    .side-foot { padding: 10px 0 0; }
    .main { padding: 22px 16px 40px; }
}

/* --- Theme switch ------------------------------------------------------------------------------------------------- */

.theme-switch { display: inline-flex; gap: 2px; padding: 3px; border-radius: 999px; background: var(--ground); border: 1px solid var(--hairline); }
.theme-switch button { background: transparent; color: var(--ink-2); padding: 6px 10px; min-height: 32px; font-size: 12px; border-radius: 999px; }
.theme-switch button[aria-pressed="true"] { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(9, 26, 52, .18); }
.side-foot .theme-switch { margin-bottom: 12px; }
.login .theme-switch { display: flex; width: max-content; margin: 16px auto 0; }
.login .theme-switch button { width: auto; margin-top: 0; }

/* A fixed, non-editable start of a value (promo codes: MITTI-). */
.input-prefix {
    display: flex;
    align-items: stretch;
    border: 1.5px solid var(--hairline);
    border-radius: 14px;
    background: var(--card);
    overflow: hidden;
}
.input-prefix:focus-within { outline: 2px solid var(--focus); outline-offset: 1px; }
.input-prefix span {
    display: flex;
    align-items: center;
    padding: 0 4px 0 12px;
    font: 800 15px/1 "Nunito", sans-serif;
    color: var(--ink);
    background: var(--muted-bg);
    user-select: none;
}
.input-prefix input { border: 0; border-radius: 0; text-transform: uppercase; }
.input-prefix input:focus { outline: none; }
.hint { display: block; margin-top: 6px; font-size: 12px; color: var(--ink-3); }

/* Small icon button (copy a promo code). */
.code-line { display: flex; align-items: center; gap: 6px; }
.icon-button {
    display: inline-grid;
    place-items: center;
    width: 32px;
    height: 32px;
    min-height: 32px;
    padding: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--ink-3);
    border: 1px solid transparent;
}
.icon-button:hover { background: var(--ground); color: var(--action); border-color: var(--hairline); }
.icon-button svg { width: 18px; height: 18px; fill: currentColor; }
.icon-button .icon-check { display: none; }
.icon-button.copied { color: var(--success-ink); }
.icon-button.copied .icon-copy { display: none; }
.icon-button.copied .icon-check { display: block; }

/* A long table scrolls inside its card; the header stays on top. */
.table-scroll { max-height: max(240px, calc(100vh - 240px)); overflow: auto; margin: 0 -8px; padding: 0 8px; }
.table-scroll thead th { position: sticky; top: 0; z-index: 1; background: var(--card); padding-top: 4px; box-shadow: inset 0 -1px 0 var(--divider); }
.table-scroll td { white-space: normal; }
.table-scroll td:first-child { white-space: nowrap; }

/* Confirmation dialog. */
.modal {
    width: min(440px, calc(100vw - 32px));
    border: 1px solid var(--hairline);
    border-radius: 26px;
    padding: 24px;
    background: var(--card);
    color: var(--ink);
    box-shadow: 0 24px 60px rgba(9, 26, 52, .28);
}
.modal::backdrop { background: rgba(9, 26, 52, .42); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .modal::backdrop { background: rgba(2, 8, 18, .62); } }
:root[data-theme="dark"] .modal::backdrop { background: rgba(2, 8, 18, .62); }
.modal h2 { margin-bottom: 8px; }
.modal-code { font: 900 20px/1.3 "Nunito", sans-serif; margin: 0 0 14px; word-break: break-all; }
.modal-facts { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0 0 14px; font-size: 14px; }
.modal-facts dt { color: var(--ink-3); font-weight: 700; }
.modal-facts dd { margin: 0; font-weight: 800; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; flex-wrap: wrap; }
button.danger-fill { background: var(--error-fill); color: #FFFFFF; }

/* Two cards side by side on wide screens (Active | Archive), stacked on narrow ones. */
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.split > .card { margin-bottom: 18px; }
.split .row-actions { flex-wrap: wrap; }
@media (max-width: 1100px) { .split { grid-template-columns: 1fr; gap: 0; } }
/* Long lists scroll inside their card instead of stretching the page. */
.split .rows { max-height: calc(100vh - 260px); overflow-y: auto; margin-right: -10px; padding-right: 10px; }

/* Long channel lists scroll inside their card. */
.rows-scroll { max-height: max(240px, calc(100vh - 220px)); overflow-y: auto; margin-right: -10px; padding-right: 10px; }
a.button { display: inline-flex; align-items: center; text-decoration: none; }
a.button:hover { text-decoration: none; }
input[type=file] { font: 700 14px/1.4 "Nunito", sans-serif; color: var(--ink-2); }

/* A list with its tools in a column on the right (Каналы); one column on narrow windows. */
.page-wide { max-width: 1680px; }
.page-full { max-width: none; }
.aside-layout { display: grid; grid-template-columns: minmax(0, 1fr) 400px; gap: 18px; align-items: start; }
.aside-layout > .card, .aside > .card { margin-bottom: 18px; }
.aside .row-actions { flex-wrap: wrap; }
@media (max-width: 1200px) { .aside-layout { grid-template-columns: 1fr; gap: 0; } .aside { order: -1; } }
.sub-heading { margin-top: 22px; }

/* Search field (Пользователи): a magnifier inside the field, the browser's own clear cross hidden. */
.search { position: relative; }
.search input[type=search] { padding-left: 40px; min-height: 46px; }
.search::before {
    content: "";
    position: absolute;
    left: 14px;
    top: 50%;
    width: 18px;
    height: 18px;
    transform: translateY(-50%);
    background: var(--ink-3);
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9.5 16q-2.73 0-4.61-1.89T3 9.5t1.89-4.61T9.5 3t4.61 1.89T16 9.5q0 1.1-.35 2.07t-.95 1.73l5.6 5.6q.28.28.28.7t-.28.7t-.7.28t-.7-.28l-5.6-5.6q-.75.6-1.72.95T9.5 16m0-2q1.88 0 3.19-1.31T14 9.5t-1.31-3.19T9.5 5T6.31 6.31T5 9.5t1.31 3.19T9.5 14'/%3E%3C/svg%3E") center / contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9.5 16q-2.73 0-4.61-1.89T3 9.5t1.89-4.61T9.5 3t4.61 1.89T16 9.5q0 1.1-.35 2.07t-.95 1.73l5.6 5.6q.28.28.28.7t-.28.7t-.7.28t-.7-.28l-5.6-5.6q-.75.6-1.72.95T9.5 16m0-2q1.88 0 3.19-1.31T14 9.5t-1.31-3.19T9.5 5T6.31 6.31T5 9.5t1.31 3.19T9.5 14'/%3E%3C/svg%3E") center / contain no-repeat;
    pointer-events: none;
}
input[type=search]::-webkit-search-cancel-button, input[type=search]::-webkit-search-decoration { -webkit-appearance: none; appearance: none; }
input[type=search]::placeholder { color: var(--ink-3); font-weight: 600; }
.search-form { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.search-form .field { flex: 1; min-width: 240px; margin-bottom: 0; }
.search-form button { min-height: 46px; }
/* Our own clear button: it drops the search, not just the typed text. */
.search input[type=search] { padding-right: 44px; }
.search-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--ink-3);
    font: 800 20px/1 "Nunito", sans-serif;
    text-decoration: none;
}
.search-clear:hover { background: var(--hairline); color: var(--ink); text-decoration: none; }

/* Пользователи: "Изменить срок" opens a small form under the row. */
.pro-edit { position: relative; }
.pro-edit > summary { list-style: none; cursor: pointer; }
.pro-edit > summary::-webkit-details-marker { display: none; }
.pro-edit-form {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    z-index: 5;
    min-width: 260px;
    padding: 14px;
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(9, 26, 52, .18);
    display: grid;
    gap: 10px;
}
.pro-edit-form .field { margin-bottom: 0; }
.modal-option { margin-top: 12px; }
.small-note { font-size: 13px; margin-top: 6px; }

/* Категории (C50): a video's YouTube picture with its length. */
.video-thumb { position: relative; flex: 0 0 auto; width: 120px; height: 68px; border-radius: 10px; overflow: hidden; background: var(--divider); display: block; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-duration { position: absolute; right: 6px; bottom: 6px; padding: 1px 6px; border-radius: 6px; background: rgba(0, 0, 0, .65); color: #fff; font: 800 11px/1.4 "Nunito", sans-serif; }

/* Learning topic picture on "Категории" (C64): 3:2 like the app's covers; the file input hides inside its button. */
.topic-thumb { flex: 0 0 auto; width: 96px; height: 64px; border-radius: 10px; overflow: hidden; background: var(--divider); display: flex; align-items: center; justify-content: center; text-align: center; }
.topic-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.topic-thumb span { font-size: 11px; line-height: 1.2; padding: 4px; }
.topic-upload label { cursor: pointer; }
.topic-upload input[type="file"] { display: none; }