/* === LAYOUT.CSS === public/assets/css/layout.css — 100vh SPA, tabs, split pane, ~200 строк */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.5;
}

/* App shell */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Header */
.app-header {
    flex: 0 0 auto;
    height: 44px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
    z-index: 10;
}

.app-logo {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.app-logo span {
    color: var(--text-muted);
    font-weight: 400;
}

.header-tabs {
    display: flex;
    align-items: stretch;
    gap: 2px;
    flex: 1;
    height: 100%;
}

.header-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 14px;
    font-size: 12px;
    color: var(--text-muted);
    border: none;
    background: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap;
    font-family: var(--font-body);
}

.header-tab:hover { color: var(--text-primary); }
.header-tab.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.header-tab .tab-count {
    font-size: 10px;
    background: var(--bg-secondary);
    border-radius: 3px;
    padding: 1px 5px;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.header-username {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
}

.btn-icon {
    width: 28px; height: 28px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.15s, background 0.15s;
}
.btn-icon:hover { color: var(--text-primary); background: var(--bg-secondary); }

/* Main area */
.app-main {
    flex: 1 1 0;
    overflow: hidden;
    display: flex;
}

/* Tab panels */
.tab-panel {
    display: none;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.tab-panel.active { display: flex; }

/* Split pane layout (calls tab) */
.split-pane {
    display: flex;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.split-list {
    flex: 0 0 340px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    overflow: hidden;
}

.split-detail {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Full pane (metrics, mistakes) */
.full-pane {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    overflow: hidden;
    padding: 10px;
    gap: 10px;
}

/* Panel header */
.panel-header {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.panel-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.panel-count {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: auto;
}

/* Scroll area */
.scroll-area {
    flex: 1 1 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.scroll-area::-webkit-scrollbar { width: 4px; }
.scroll-area::-webkit-scrollbar-track { background: transparent; }
.scroll-area::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 2px; }

/* Filters bar */
.filters-bar {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
    flex-wrap: wrap;
}

.filter-select, .filter-input {
    height: 26px;
    padding: 0 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 12px;
    font-family: var(--font-body);
    outline: none;
    transition: border-color 0.15s;
}
.filter-select:focus, .filter-input:focus { border-color: var(--border-focus); }
.filter-input { width: 120px; }
.filter-select { min-width: 110px; }

.btn-sm {
    height: 26px;
    padding: 0 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 12px;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}
.btn-sm:hover { border-color: var(--border-focus); color: var(--text-primary); }
.btn-sm.primary { background: var(--color-accent); border-color: var(--color-accent); color: oklch(98% 0.005 260); }
.btn-sm.primary:hover { opacity: 0.85; }

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 40px 20px;
    color: var(--text-muted);
    text-align: center;
}
.empty-state svg { opacity: 0.4; }
.empty-state h3 { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.empty-state p  { font-size: 12px; }

/* Metrics grid (stats strip) */
.stats-strip {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.stat-card {
    flex: 0 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 120px;
}
.stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); }
.stat-value { font-size: 22px; font-weight: 700; color: var(--text-primary); line-height: 1.1; }
.stat-sub   { font-size: 11px; color: var(--text-muted); }

/* 2-col detail grid */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    height: 100%;
    overflow: hidden;
}
.detail-col { display: flex; flex-direction: column; gap: 10px; overflow: hidden; }

/* Section accordion */
.section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 8px;
}
.section-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    cursor: pointer;
    user-select: none;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    transition: background 0.15s;
}
.section-header:hover { background: var(--card-bg-hover); }
.section-arrow {
    margin-left: auto;
    transition: transform 0.2s var(--ease-out-quart);
    color: var(--text-muted);
}
.section.collapsed .section-body { display: none; }
.section.collapsed .section-arrow { transform: rotate(-90deg); }
.section-body { padding: 10px; }

/* Loading spinner */
.spinner {
    width: 20px; height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 10px;
    border-top: 1px solid var(--border-color);
    justify-content: center;
}
.page-btn {
    width: 26px; height: 26px;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: none;
    color: var(--text-muted);
    font-size: 12px;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.15s;
}
.page-btn:hover { border-color: var(--border-focus); color: var(--text-primary); }
.page-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: oklch(98% 0 0); }
.page-btn:disabled { opacity: 0.3; cursor: default; }