/* --- Zmienne globalne i reset --- */
:root {
    --bg-color: #f8f9fa;
    --header-bg: #ffffff;
    --table-bg: #ffffff;
    --border-color: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --primary-color: #007bff;
    --active-cell-border: #0069d9;
    --row-hover-bg: #f1f3f5;
    --shadow: 0 2px 4px rgba(0,0,0,0.05);
    --font-family: 'Inter', sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
}

/* --- Układ aplikacji --- */
#app-container { display: flex; flex-direction: column; height: 100vh; }

/* --- Nagłówek --- */
.app-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 24px; background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0; z-index: 20;
}
.app-header h1 { font-size: 20px; font-weight: 600; }
.header-actions { display: flex; gap: 12px; }
.header-btn {
    display: flex; align-items: center; gap: 8px; padding: 8px 16px;
    background-color: transparent; border: 1px solid var(--border-color);
    border-radius: 6px; cursor: pointer; font-size: 14px;
    font-weight: 500; transition: all 0.2s ease;
}
.header-btn:hover { background-color: var(--bg-color); border-color: #ced4da; }

/* --- Pasek Formuły --- */
#formula-bar-container {
    display: flex; align-items: center; padding: 8px 24px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.fx-label {
    padding: 8px 12px; background-color: var(--bg-color); border: 1px solid var(--border-color);
    border-right: none; border-radius: 6px 0 0 6px; font-size: 14px;
    font-weight: 600; color: var(--text-muted);
}
#formula-bar {
    flex-grow: 1; padding: 8px 12px; font: inherit; font-size: 14px;
    border: 1px solid var(--border-color); border-radius: 0 6px 6px 0; outline: none;
}
#formula-bar:focus { border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25); }

/* --- Pasek Narzędzi z "Pastylkami" --- */
#tabs-toolbar {
    background-color: var(--header-bg);
    padding: 8px 40px 12px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0; display: flex; flex-direction: column; gap: 8px;
    transition: max-height 0.3s ease-in-out, padding 0.3s ease-in-out, border-width 0.3s ease-in-out;
    max-height: 200px; overflow: hidden;
}
#tabs-toolbar.is-hidden {
    max-height: 0; padding-top: 0; padding-bottom: 0; border-width: 0;
}

/* --- Pastylki i przewijanie --- */
.tabs-wrapper { position: relative; }
.tabs-container {
    display: flex; gap: 6px; padding-bottom: 4px; overflow-x: auto;
    scrollbar-width: none; -ms-overflow-style: none;
}
.tabs-container::-webkit-scrollbar { display: none; }
.tab {
    padding: 6px 16px; border: 1px solid var(--border-color);
    background-color: transparent; border-radius: 999px;
    cursor: pointer; font-size: 14px; font-weight: 500;
    white-space: nowrap; transition: all 0.2s ease;
}
.tab:hover { background-color: var(--row-hover-bg); }
.tab.active {
    background-color: var(--primary-color); color: #ffffff; border-color: var(--primary-color);
}
.scroll-btn {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
    background-color: rgba(255, 255, 255, 0.9); border: 1px solid var(--border-color);
    border-radius: 50%; width: 32px; height: 32px; display: flex;
    align-items: center; justify-content: center; cursor: pointer;
    box-shadow: var(--shadow); transition: opacity 0.2s ease;
}
.scroll-btn.left { left: -16px; }
.scroll-btn.right { right: -16px; }
.scroll-btn:disabled { opacity: 0; pointer-events: none; }

/* --- Tabela --- */
#table-wrapper { position: relative; flex-grow: 1; overflow: auto; background-color: var(--bg-color); }
#product-table { width: 100%; border-collapse: collapse; white-space: nowrap; }
#product-table th, #product-table td {
    padding: 12px 16px; border: 1px solid var(--border-color);
    text-align: left; font-size: 14px; vertical-align: middle;
}
#product-table thead { position: sticky; top: 0; z-index: 10; }
#product-table th { background-color: #f8f9fa; font-weight: 600; color: var(--text-muted); }
#product-table tbody tr:hover { background-color: var(--row-hover-bg); }
#product-table td { background-color: var(--table-bg); }
#product-table td.active-cell { outline: 2px solid var(--active-cell-border) !important; outline-offset: -2px; }
.cell-input {
    width: 100%; padding: 8px; font: inherit;
    border: 1px solid var(--primary-color); border-radius: 4px; outline: none;
}

/* --- Menu Akcji --- */
.actions-cell { position: relative; }
.actions-btn {
    background: none; border: none; cursor: pointer; padding: 4px;
    border-radius: 50%; display: flex; align-items: center;
    justify-content: center; margin: 0 auto;
}
.actions-btn:hover { background-color: var(--border-color); }
.actions-btn svg { pointer-events: none; }
.actions-menu {
    position: fixed; background-color: var(--table-bg);
    border: 1px solid var(--border-color); border-radius: 6px; box-shadow: var(--shadow);
    z-index: 1000; list-style: none; padding: 8px 0;
    width: 180px; display: none;
}
.actions-menu.visible { display: block; }
.actions-menu li {
    display: flex; align-items: center; gap: 10px; padding: 8px 16px;
    cursor: pointer; font-size: 14px;
}
.actions-menu li:hover { background-color: var(--row-hover-bg); }

/* --- Wskaźnik ładowania --- */
.spinner-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    display: flex; align-items: center; justify-content: center;
    z-index: 100; visibility: hidden; opacity: 0;
    transition: visibility 0s 0.2s, opacity 0.2s linear;
}
.spinner-overlay.visible {
    visibility: visible; opacity: 1; transition-delay: 0s;
}
.spinner {
    width: 48px; height: 48px; border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* --- Panele Boczne --- */
.side-panel {
    position: fixed; top: 0; right: 0; width: 320px; height: 100%;
    background-color: var(--header-bg); border-left: 1px solid var(--border-color);
    box-shadow: -4px 0 15px rgba(0,0,0,0.1); transform: translateX(100%);
    transition: transform 0.3s ease-in-out; z-index: 100;
    display: flex; flex-direction: column;
}
.side-panel.visible { transform: translateX(0); }
.panel-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 24px; border-bottom: 1px solid var(--border-color); flex-shrink: 0;
}
.panel-header h2 { font-size: 18px; font-weight: 600; }
.panel-close-btn { background: none; border: none; cursor: pointer; padding: 4px; }
.panel-content { padding: 24px; overflow-y: auto; flex-grow: 1; }
.column-toggle { display: flex; align-items: center; margin-bottom: 16px; }
.column-toggle label { margin-left: 12px; cursor: pointer; user-select: none; }
.column-toggle input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; }
.filter-group { margin-bottom: 24px; }
.filter-group label { font-weight: 500; margin-bottom: 8px; display: block; }
.filter-group input[type="range"], .filter-group select { width: 100%; }
.filter-group select { padding: 8px; border-radius: 4px; border: 1px solid var(--border-color); }
.checkbox-group { display: flex; align-items: center; margin-top: 8px; }
.checkbox-group label { margin-bottom: 0; margin-left: 8px; }