/* css/kss-estimate.css — Модул „Остойностяване на КСС".
   Page-scoped — зарежда се само от kss-estimate.html.
   BEM-lite: kssest-dropzone / kssest-chip / kssest-table / kssest-panel.
   Всички цветове — само през дизайн токените (base.css).
   ⚠️ [hidden] guard-ове: всеки селектор с display:flex/grid има
   двойник .selector[hidden]{display:none} (капанът от proceno.md). */

/* ============ Банери ============ */
/* Gate за Free tier — функцията е заключена (issue #142). */
.kssest-gate {
    display: block;
    max-width: 640px;
    margin: 2rem auto;
    text-align: center;
}
.kssest-gate[hidden] { display: none; }

.kssest-resume-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.8rem 1rem;
    margin-bottom: 1.25rem;
    background: var(--surface);
    border: 1px solid var(--primary);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}
.kssest-resume-banner[hidden] { display: none; }

/* ============ Dropzone ============ */
.kssest-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem 1rem;
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-alt);
    text-align: center;
    cursor: pointer;
    transition: border-color var(--t-base) var(--ease), background var(--t-base) var(--ease);
}
.kssest-dropzone[hidden] { display: none; }
.kssest-dropzone:hover,
.kssest-dropzone:focus-visible,
.kssest-dropzone--dragover {
    border-color: var(--primary);
    background: var(--surface);
}
.kssest-dropzone__icon { font-size: 1.8rem; }
.kssest-dropzone__text { font-size: 0.9rem; color: var(--text-secondary); }

.kssest-fileinfo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 0.8rem;
    padding: 0.6rem 0.9rem;
    background: var(--success-light, rgba(16, 185, 129, 0.1));
    border: 1px solid var(--success, #10b981);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
}
.kssest-fileinfo[hidden] { display: none; }

.kssest-file-error {
    display: block;
    margin-top: 0.8rem;
    padding: 0.8rem 1rem;
    background: var(--danger-light, rgba(239, 68, 68, 0.08));
    border: 1px solid var(--danger, #ef4444);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
}
.kssest-file-error[hidden] { display: none; }
.kssest-format-example { margin-top: 0.6rem; overflow-x: auto; }
.kssest-format-example table {
    border-collapse: collapse;
    margin-top: 0.4rem;
    font-size: 0.82rem;
}
.kssest-format-example th,
.kssest-format-example td {
    border: 1px solid var(--border);
    padding: 0.25rem 0.6rem;
    text-align: left;
}

/* ============ Параметри ============ */
.kssest-param { margin-bottom: 1.4rem; }
.kssest-param__label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.45rem;
}
.kssest-param__label small {
    display: block;
    font-weight: 400;
    color: var(--text-muted);
}

.kssest-region-chips,
.kssest-period-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.kssest-chip {
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--surface);
    color: var(--text-secondary);
    font: inherit;
    font-size: 0.82rem;
    cursor: pointer;
    transition: all var(--t-base) var(--ease);
}
.kssest-chip:hover { border-color: var(--primary); color: var(--primary); }
.kssest-chip--active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-inverse);
}
.kssest-chip--all { font-weight: 600; }

.kssest-fallback {
    display: flex;
    align-items: flex-start;
    gap: 0.45rem;
    margin-top: 0.7rem;
    font-size: 0.84rem;
    color: var(--text-secondary);
    cursor: pointer;
}
.kssest-fallback input { margin-top: 0.15rem; }

.kssest-period-custom {
    display: flex;
    gap: 1rem;
    margin-top: 0.6rem;
    flex-wrap: wrap;
}
.kssest-period-custom[hidden] { display: none; }
.kssest-period-custom label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.86rem;
    color: var(--text-secondary);
}
.kssest-period-custom input,
#kssest-strategy {
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.9rem;
}
.kssest-strategy-hint {
    display: block;
    margin-top: 0.4rem;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.kssest-usage {
    display: block;
    margin: 0.6rem 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.kssest-usage[hidden] { display: none; }
.kssest-usage--exceeded { color: var(--danger, #ef4444); font-weight: 600; }

.kssest-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    margin-top: 1rem;
}
.kssest-actions--start { justify-content: flex-start; }

/* ============ Обработка ============ */
.kssest-progress {
    height: 10px;
    background: var(--surface-alt);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 1rem 0 0.6rem;
}
.kssest-progress__bar {
    height: 100%;
    width: 0;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.5s var(--ease);
}
.kssest-progress__text { font-size: 0.92rem; color: var(--text-secondary); }

/* ============ Summary (sticky) ============ */
.kssest-summary {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.8rem 1rem;
    margin-bottom: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
}
.kssest-summary[hidden] { display: none; }
.kssest-summary__stats {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    font-size: 0.88rem;
}
.kssest-summary__stats strong { font-size: 1.02rem; }
.kssest-summary__actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

/* P0.1 (#143): валута на експорта */
.kssest-currency {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.86rem;
    color: var(--text-secondary);
}
/* P1.6: числови експорт опции (Непредвидени % / ДДС %) */
.kssest-numopt input {
    width: 4.5rem;
    padding: 0.45rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
}
.kssest-currency select {
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font: inherit;
}

/* ============ Review таблица ============
   Оплакване (21.07): при дълги КСС-та таблицата преливаше хоризонтално —
   скролбарът беше чак под нея, съдържанието изглеждаше „струпано в първата
   колона", а вертикално се скролваше само с колелцето, без видим плъзгач.
   Решение по конструкция: table-layout:fixed с процентни колони (таблицата
   ВИНАГИ се побира в контейнера; дълги низове се чупят, не разпъват) +
   вертикален скрол-контейнер със sticky заглавен ред и ПОСТОЯННО видим,
   хващаем скролбар отстрани. */
.kssest-table-wrap {
    max-height: 72vh;
    overflow-y: auto;
    overflow-x: auto;                 /* предпазно за много тесни екрани */
    scrollbar-gutter: stable;
    scrollbar-width: thin;                              /* Firefox */
    scrollbar-color: var(--border) var(--surface-alt);  /* Firefox */
}
.kssest-table-wrap::-webkit-scrollbar { width: 12px; height: 12px; }
.kssest-table-wrap::-webkit-scrollbar-track {
    background: var(--surface-alt);
    border-radius: 6px;
}
.kssest-table-wrap::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 6px;
    border: 2px solid var(--surface-alt);
}
.kssest-table-wrap::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
.kssest-table {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    font-size: 0.86rem;
}
/* 7 колони = 100%; фиксираните проценти държат подредбата при всякакво съдържание */
.kssest-table th:nth-child(1) { width: 26%; }   /* № и описание */
.kssest-table th:nth-child(2) { width: 9%; }    /* Мярка / К-во */
.kssest-table th:nth-child(3) { width: 24%; }   /* Намерена позиция */
.kssest-table th:nth-child(4) { width: 9%; }    /* Ед. цена */
.kssest-table th:nth-child(5) { width: 13%; }   /* Диапазон */
.kssest-table th:nth-child(6) { width: 10%; }   /* Увереност */
.kssest-table th:nth-child(7) { width: 9%; }    /* Стойност */
.kssest-table th {
    text-align: left;
    padding: 0.55rem 0.6rem;
    border-bottom: 2px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    position: sticky;
    top: 0;
    background: var(--surface);
    z-index: 2;
}
.kssest-table td {
    padding: 0.55rem 0.6rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
    overflow-wrap: anywhere;
}
.kssest-row--item { cursor: pointer; transition: background var(--t-base) var(--ease); }
.kssest-row--item:hover { background: var(--surface-alt); }
.kssest-row--selected { background: var(--surface-alt); outline: 2px solid var(--primary); outline-offset: -2px; }

/* P1.2: прегледан ред — тих, но различим (не крие съдържание) */
.kssest-row--reviewed > td:first-child { border-left: 3px solid var(--success, #16a34a); }
.kssest-row--reviewed { opacity: 0.72; }
.kssest-row--reviewed:hover { opacity: 1; }

/* P1.2: bulk review toolbar */
.kssest-review-toolbar {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
    padding: 0 0 0.75rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.75rem;
}
.kssest-remaining { font-size: 0.925rem; color: var(--text-secondary); }
.kssest-remaining strong { color: var(--text); }
.kssest-remaining--done { color: var(--success, #16a34a); font-weight: 600; }
.kssest-kbd-hint { margin-left: auto; color: var(--text-secondary); font-size: 0.8rem; }
.kssest-kbd-hint kbd {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 0 0.3em;
    font-family: inherit;
}
@media (max-width: 720px) {
    .kssest-kbd-hint { display: none; }
}
.kssest-row--section td {
    background: var(--surface-alt);
    font-weight: 700;
    color: var(--text-secondary);
}
.kssest-row--subtotal td {
    font-weight: 600;
    color: var(--text-secondary);
    border-top: 2px solid var(--border);
}
.kssest-row--locked td { filter: blur(0); }
.kssest-row--locked .kssest-locked-cell {
    color: var(--text-muted);
    font-style: italic;
}
.kssest-num { color: var(--text-muted); font-size: 0.8rem; margin-right: 0.35rem; }
.kssest-col-price, .kssest-col-total { text-align: right; }
.kssest-table td.kssest-col-price, .kssest-table td.kssest-col-total { text-align: right; font-variant-numeric: tabular-nums; }
.kssest-range { color: var(--text-secondary); font-size: 0.82rem; }
.kssest-range small { display: block; color: var(--text-muted); }
.kssest-match-name { color: var(--primary); }
.kssest-match-name a { color: inherit; }

/* Badges — увереност */
.kssest-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.15rem 0.55rem;
    border-radius: var(--radius-full);
    font-size: 0.76rem;
    font-weight: 600;
    white-space: nowrap;
}
.kssest-badge--high { background: var(--success-light, rgba(16,185,129,0.12)); color: var(--success, #10b981); }
.kssest-badge--review { background: var(--warning-light, rgba(245,158,11,0.12)); color: var(--warning-strong, #b45309); }
.kssest-badge--none { background: var(--danger-light, rgba(239,68,68,0.1)); color: var(--danger, #ef4444); }
.kssest-badge--unit { background: var(--danger-light, rgba(239,68,68,0.1)); color: var(--danger, #ef4444); }
.kssest-badge--manual { background: var(--surface-alt); color: var(--text-secondary); }
.kssest-flag {
    display: inline-block;
    margin-left: 0.35rem;
    font-size: 0.72rem;
    color: var(--text-muted);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 0.05rem 0.35rem;
    white-space: nowrap;
}
/* P0.5: записи с неизвестна дата — никога без индикация */
.kssest-flag--warn {
    color: var(--warning, #b45309);
    border-color: var(--warning, #b45309);
    border-style: solid;
}

/* ============ Панел за ред (алтернативи / търсене / ръчна цена) ============ */
.kssest-panel-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 90;
}
.kssest-panel-backdrop[hidden] { display: none; }

.kssest-panel {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(460px, 100vw);
    background: var(--surface);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    z-index: 100;
    overflow: hidden;
}
.kssest-panel[hidden] { display: none; }
.kssest-panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.1rem;
    border-bottom: 1px solid var(--border);
}
.kssest-panel__head h3 { margin: 0; font-size: 1rem; }
.kssest-panel__close {
    border: 0;
    background: none;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--text-muted);
    cursor: pointer;
}
.kssest-panel__body {
    padding: 1rem 1.1rem;
    overflow-y: auto;
    flex: 1;
}
.kssest-panel__body h4 {
    margin: 1.2rem 0 0.5rem;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
}
.kssest-panel__original {
    padding: 0.7rem 0.9rem;
    background: var(--surface-alt);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
}

.kssest-alternatives { display: flex; flex-direction: column; gap: 0.4rem; }
.kssest-alt {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    width: 100%;
    text-align: left;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color var(--t-base) var(--ease);
}
.kssest-alt:hover { border-color: var(--primary); }
.kssest-alt--current { border-color: var(--primary); background: var(--surface-alt); }
.kssest-alt__meta { white-space: nowrap; color: var(--text-secondary); font-size: 0.8rem; }
.kssest-alt__warn { color: var(--danger, #ef4444); font-size: 0.76rem; }

.kssest-panel-search input[type="search"] {
    width: 100%;
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.9rem;
}
.kssest-search-results { display: flex; flex-direction: column; gap: 0.4rem; margin-top: 0.5rem; }
.kssest-search-results .kssest-hint { color: var(--text-muted); font-size: 0.82rem; }

.kssest-manual-price { display: flex; gap: 0.5rem; }
.kssest-manual-price input {
    flex: 1;
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.9rem;
}
.kssest-manual-note { display: block; margin-top: 0.4rem; color: var(--text-muted); font-size: 0.8rem; }

/* ============ P1.3: ценово позициониране (слайдър) ============ */
.kssest-pricing {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.6rem 0.2rem 0.9rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}
.kssest-pricing[hidden] { display: none; }
.kssest-pricing__label { font-weight: 600; color: var(--text); white-space: nowrap; }
.kssest-pricing__slider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 240px;
}
.kssest-pricing__slider input[type="range"] {
    flex: 1;
    accent-color: var(--primary);
    cursor: pointer;
}
.kssest-pricing__slider input[type="range"]:disabled { opacity: 0.4; cursor: not-allowed; }
.kssest-pricing__end {
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-align: center;
    white-space: nowrap;
    line-height: 1.15;
}
.kssest-pricing__end small { color: var(--text-muted); }
.kssest-pricing__total { font-size: 0.9rem; color: var(--text-secondary); white-space: nowrap; }
.kssest-pricing__total strong { color: var(--text); font-variant-numeric: tabular-nums; }
.kssest-pricing__note { color: var(--text-muted); font-style: italic; }

/* ============ Responsive ============ */
@media (max-width: 720px) {
    .kssest-summary { position: static; }
    .kssest-summary__actions { width: 100%; }
    .kssest-table { font-size: 0.8rem; }
    .kssest-pricing { flex-direction: column; align-items: stretch; }
    .kssest-pricing__slider { min-width: 0; }
}