/* Kartei — оформление интерфейса */

:root {
    --bg: #f5f6f8;
    --bg-panel: #ffffff;
    --bg-soft: #eceff3;
    --bg-hover: #e2e6ec;
    --text: #1f2328;
    --text-dim: #6a737d;
    --border: #d5dae1;
    --accent: #2b6cb0;
    --accent-soft: #dbeafe;
    --new: #2b6cb0;
    --lrn: #c53030;
    --rev: #2f855a;
    --shadow: 0 1px 3px rgba(0, 0, 0, .09);
    --radius: 8px;
}

:root[data-theme="dark"] {
    --bg: #1b1d21;
    --bg-panel: #24272c;
    --bg-soft: #2c3036;
    --bg-hover: #353a41;
    --text: #e6e8ea;
    --text-dim: #99a1ab;
    --border: #3a3f47;
    --accent: #63a4ff;
    --accent-soft: #24384f;
    --new: #63a4ff;
    --lrn: #ff8a80;
    --rev: #7bd88f;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font: 14px/1.5 -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

button, input, select, textarea { font: inherit; color: inherit; }

/* ---------------- шапка ---------------- */

header {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 14px;
    height: 46px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 40;
}

.brand {
    font-weight: 700;
    font-size: 16px;
    margin-right: 16px;
    letter-spacing: .3px;
}
.brand span { color: var(--accent); }

nav { display: flex; gap: 2px; }

nav button {
    background: none;
    border: 0;
    padding: 7px 14px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-dim);
}
nav button:hover { background: var(--bg-hover); color: var(--text); }
nav button.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.spacer { flex: 1; }

.hdr-info { color: var(--text-dim); font-size: 13px; margin-right: 10px; }

.icon-btn {
    background: none;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 6px 9px;
    cursor: pointer;
    color: var(--text-dim);
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }
.icon-btn:disabled { opacity: .35; cursor: default; }

/* ---------------- общая раскладка ---------------- */

main { padding: 20px; max-width: 1500px; margin: 0 auto; }
.page { display: none; }
.page.active { display: block; }

h2 { margin: 0 0 14px; font-size: 19px; font-weight: 650; }
h3 { margin: 18px 0 8px; font-size: 15px; font-weight: 650; }

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
}

.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.muted { color: var(--text-dim); }
.small { font-size: 12.5px; }
.center { text-align: center; }
.grow { flex: 1; }

/* ---------------- кнопки ---------------- */

.btn {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 7px 14px;
    cursor: pointer;
    white-space: nowrap;
}
.btn:hover { background: var(--bg-hover); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: #c53030; }
:root[data-theme="dark"] .btn.danger { color: #ff8a80; }
.btn.sm { padding: 4px 9px; font-size: 13px; }

input[type=text], input[type=number], input[type=search], select, textarea {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 7px 10px;
    width: 100%;
}
input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--accent-soft);
    border-color: var(--accent);
}
textarea { resize: vertical; font-family: ui-monospace, Consolas, monospace; }
label.field { display: block; margin-bottom: 10px; }
label.field > span { display: block; margin-bottom: 4px; font-size: 13px; color: var(--text-dim); }
label.inline { display: flex; align-items: center; gap: 7px; }
label.inline input { width: auto; }

/* ---------------- дерево колод ---------------- */

.deck-table { width: 100%; border-collapse: collapse; }
.deck-table th {
    text-align: right;
    font-size: 12px;
    color: var(--text-dim);
    font-weight: 600;
    padding: 4px 8px;
}
.deck-table th:first-child { text-align: left; }
.deck-row td { padding: 7px 8px; border-top: 1px solid var(--border); }
.deck-row:hover { background: var(--bg-soft); }
.deck-name { cursor: pointer; display: flex; align-items: center; gap: 6px; }
.deck-name:hover { color: var(--accent); }
.deck-count { text-align: right; width: 62px; font-variant-numeric: tabular-nums; }
.c-new { color: var(--new); font-weight: 600; }
.c-lrn { color: var(--lrn); font-weight: 600; }
.c-rev { color: var(--rev); font-weight: 600; }
.c-zero { color: var(--text-dim); font-weight: 400; }
.twisty {
    width: 16px; text-align: center; cursor: pointer;
    color: var(--text-dim); user-select: none; font-size: 11px;
}
.deck-gear { opacity: 0; padding: 2px 6px; }
.deck-row:hover .deck-gear { opacity: 1; }
.filtered-badge {
    font-size: 11px; background: var(--accent-soft); color: var(--accent);
    padding: 1px 6px; border-radius: 4px;
}

/* ---------------- обучение ---------------- */

.study-wrap { max-width: 830px; margin: 0 auto; }

.study-counts {
    display: flex; justify-content: center; gap: 22px;
    padding: 8px 0 14px; font-size: 14px;
}
.study-counts b { font-variant-numeric: tabular-nums; }

.card-area {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-height: 260px;
    padding: 0;
    overflow: hidden;
}
#card-frame { width: 100%; border: 0; display: block; min-height: 260px; }

.answer-bar { display: flex; gap: 10px; justify-content: center; margin-top: 16px; }
.answer-bar .btn { min-width: 118px; padding: 11px 8px; text-align: center; }
.ease-label { display: block; font-size: 12px; opacity: .8; margin-top: 2px; }
.b-again { border-color: #e07070; }
.b-hard  { border-color: #d6a860; }
.b-good  { border-color: #66a97a; }
.b-easy  { border-color: #6b9fd4; }

.study-tools { display: flex; gap: 6px; justify-content: center; margin-top: 14px; }

.flag-dot {
    display: inline-block; width: 11px; height: 11px; border-radius: 50%;
    border: 1px solid rgba(0,0,0,.2);
}
.flag-1 { background: #e05a5a; } .flag-2 { background: #e08a3c; }
.flag-3 { background: #57a05a; } .flag-4 { background: #4a7fc1; }
.flag-5 { background: #cf6ab0; } .flag-6 { background: #45b0b0; }
.flag-7 { background: #8a63c4; } .flag-0 { background: transparent; border-style: dashed; }

/* ---------------- обозреватель ---------------- */

.browser { display: grid; grid-template-columns: 232px 1fr; gap: 14px; align-items: start; }

.sidebar {
    background: var(--bg-panel); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 10px;
    max-height: calc(100vh - 150px); overflow: auto; font-size: 13px;
}
.side-group { margin-bottom: 12px; }
.side-group > .side-title {
    font-size: 11px; text-transform: uppercase; letter-spacing: .5px;
    color: var(--text-dim); margin-bottom: 4px; font-weight: 700;
}
.side-item {
    padding: 4px 7px; border-radius: 5px; cursor: pointer;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.side-item:hover { background: var(--bg-hover); }
.side-item.sel { background: var(--accent-soft); color: var(--accent); }

.table-wrap {
    background: var(--bg-panel); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: auto;
    max-height: calc(100vh - 230px);
}
table.rows { width: 100%; border-collapse: collapse; font-size: 13px; }
table.rows th {
    position: sticky; top: 0; background: var(--bg-soft); z-index: 2;
    text-align: left; padding: 7px 9px; border-bottom: 1px solid var(--border);
    cursor: pointer; white-space: nowrap; font-weight: 600;
}
table.rows th:hover { background: var(--bg-hover); }
table.rows td {
    padding: 6px 9px; border-bottom: 1px solid var(--border);
    max-width: 400px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
table.rows tr { cursor: pointer; }
table.rows tr:hover td { background: var(--bg-soft); }
table.rows tr.sel td { background: var(--accent-soft); }
tr.suspended td { background: #fff4cc; }
:root[data-theme="dark"] tr.suspended td { background: #4a4326; }
tr.suspended.sel td, tr.sel td { background: var(--accent-soft); }
tr.marked td { font-style: italic; }

/* ---------------- редактор заметки ---------------- */

.editor-field { margin-bottom: 10px; }
.editor-field .fname {
    font-size: 12px; color: var(--text-dim); margin-bottom: 3px;
    display: flex; justify-content: space-between; align-items: center;
}
.rich {
    border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px;
    min-height: 46px; background: var(--bg-panel); outline: none;
}
.rich:focus { border-color: var(--accent); outline: 2px solid var(--accent-soft); }
.rich img { max-width: 100%; }
.editor-toolbar { display: flex; gap: 4px; margin-bottom: 8px; flex-wrap: wrap; }
.dupe-warn {
    background: #ffe9c9; border: 1px solid #e0b070; color: #7a4a00;
    padding: 5px 9px; border-radius: 5px; font-size: 13px; margin-bottom: 8px;
}
:root[data-theme="dark"] .dupe-warn { background: #4a3a1c; color: #ffd89a; }

/* ---------------- модальные окна ---------------- */

.modal-back {
    position: fixed; inset: 0; background: rgba(0, 0, 0, .45);
    display: flex; align-items: flex-start; justify-content: center;
    z-index: 100; padding: 40px 16px; overflow: auto;
}
.modal {
    background: var(--bg-panel); border-radius: 10px; box-shadow: 0 10px 40px rgba(0,0,0,.3);
    width: 100%; max-width: 640px; max-height: calc(100vh - 80px);
    display: flex; flex-direction: column;
}
.modal.wide { max-width: 1000px; }
.modal-head {
    padding: 14px 18px; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; font-weight: 650;
}
.modal-body { padding: 16px 18px; overflow: auto; }
.modal-foot {
    padding: 12px 18px; border-top: 1px solid var(--border);
    display: flex; gap: 8px; justify-content: flex-end;
}

.tabs { display: flex; gap: 3px; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.tabs button {
    background: none; border: 0; border-bottom: 2px solid transparent;
    padding: 8px 13px; cursor: pointer; color: var(--text-dim);
}
.tabs button.active { border-bottom-color: var(--accent); color: var(--accent); font-weight: 600; }

/* ---------------- статистика ---------------- */

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); gap: 12px; }
.stat-card {
    background: var(--bg-panel); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px;
}
.stat-num { font-size: 25px; font-weight: 700; }
.stat-lbl { color: var(--text-dim); font-size: 12.5px; margin-top: 2px; }
.chart { width: 100%; height: 210px; }
.chart-box { margin-top: 14px; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; margin-top: 6px; }
.legend i { display: inline-block; width: 11px; height: 11px; border-radius: 2px; margin-right: 5px; }

.heat { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 11px); gap: 2px; }
.heat div { width: 11px; height: 11px; border-radius: 2px; background: var(--bg-soft); }

table.plain { width: 100%; border-collapse: collapse; font-size: 13px; }
table.plain th, table.plain td { padding: 6px 9px; border-bottom: 1px solid var(--border); text-align: left; }
table.plain th { color: var(--text-dim); font-weight: 600; }
table.plain td.num, table.plain th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------------- уведомления ---------------- */

#toasts { position: fixed; bottom: 18px; right: 18px; z-index: 200; display: flex;
          flex-direction: column; gap: 8px; align-items: flex-end; }
.toast {
    background: var(--bg-panel); border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 6px; padding: 10px 14px; box-shadow: 0 4px 14px rgba(0,0,0,.18);
    max-width: 430px; animation: slide .18s ease-out;
}
.toast.err { border-left-color: #d05050; }
.toast.ok { border-left-color: #4a9d5f; }
@keyframes slide { from { opacity: 0; transform: translateY(8px); } }

kbd {
    background: var(--bg-soft); border: 1px solid var(--border);
    border-bottom-width: 2px; border-radius: 4px; padding: 0 5px;
    font-size: 11.5px; font-family: inherit;
}

.empty { text-align: center; padding: 44px 20px; color: var(--text-dim); }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; }
.pill {
    display: inline-block; background: var(--bg-soft); border: 1px solid var(--border);
    border-radius: 11px; padding: 1px 9px; font-size: 12px; margin: 0 3px 3px 0;
}
.tag-pill { cursor: pointer; }
.tag-pill:hover { background: var(--bg-hover); }