/* ================================================================
   filament-gantt-lite — Custom SVG Gantt Chart
   Pure in-house code, no third-party Gantt library.
   Class names use the `cg-*` prefix internally (chart engine) and
   `fg-lite-*` for the page wrapper / toolbar / popup.
   ================================================================ */

/* ── Theme tokens (light defaults) ── */
:root {
    --cg-bg: #ffffff;
    --cg-row-odd: #fdfdfd;
    --cg-row-even: #f9fafb;
    --cg-header-bg: #ffffff;
    --cg-border: #e5e7eb;
    --cg-tick: #f3f3f3;
    --cg-tick-thick: #e5e7eb;
    --cg-text-primary: #171717;
    --cg-text-muted: #7c7c7c;
    --cg-text-on-bar: #ffffff;
    --cg-today-line: #3B82F6;
    --cg-weekend-fill: rgba(0, 0, 0, 0.02);
    --cg-arrow-color: #d1d5db;
    --cg-arrow-dot: #d1d5db;
    --cg-parent-line-color: #d1d5db;
    --cg-parent-dot-color: #d1d5db;
    --cg-dep-arrow-color: #6b7280;
    --cg-dep-arrowhead-color: #6b7280;
    --cg-progress-bg: rgba(0, 0, 0, 0.1);
    --cg-ignored-hatch: grey;
}

/* ── Dark theme ── */
.dark {
    --cg-bg: #25282E;
    --cg-row-odd: #21242A;
    --cg-row-even: #25282E;
    --cg-header-bg: #25282E;
    --cg-border: #2E3239;
    --cg-tick: #2B2E34;
    --cg-tick-thick: #2E3239;
    --cg-text-primary: #e5e7eb;
    --cg-text-muted: #919EAB;
    --cg-text-on-bar: #ffffff;
    --cg-today-line: #3B82F6;
    --cg-weekend-fill: rgba(255, 255, 255, 0.02);
    --cg-arrow-color: #4b5563;
    --cg-arrow-dot: #4b5563;
    --cg-parent-line-color: #4b5563;
    --cg-parent-dot-color: #4b5563;
    --cg-dep-arrow-color: #9ca3af;
    --cg-dep-arrowhead-color: #9ca3af;
    --cg-progress-bg: rgba(255, 255, 255, 0.08);
    --cg-ignored-hatch: #555;
}

/* ── Container ── */
.cg-container {
    position: relative;
    overflow: visible;
    border-radius: 0;
    background: var(--cg-bg);
    width: fit-content;
    min-width: 100%;
}

.cg-container:active {
    cursor: grabbing;
}

/* ── SVG root ── */
.cg-gantt {
    user-select: none;
    overflow: visible;
}

/* ── Grid ── */
.cg-grid-bg {
    fill: var(--cg-bg);
}

.cg-row {
    fill: var(--cg-row-odd);
}

.cg-row-even {
    fill: var(--cg-row-even);
}

.cg-tick {
    stroke: var(--cg-tick);
    stroke-width: 0.4;
}

.cg-tick-thick {
    stroke: var(--cg-tick-thick);
    stroke-width: 0.7;
}

.cg-row-line {
    stroke: var(--cg-tick);
    stroke-width: 0.3;
}

/* ── Headers (DOM divs) ── */
.cg-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--cg-header-bg);
    border-bottom: 1px solid var(--cg-border);
    overflow: hidden;
    user-select: none;
}

.cg-upper-header {
    position: relative;
    height: 45px;
}

.cg-lower-header {
    position: relative;
    height: 30px;
}

.cg-upper-text {
    position: absolute;
    font-size: 14px;
    font-weight: 600;
    color: var(--cg-text-primary);
    white-space: nowrap;
    padding: 0 8px;
    line-height: 45px;
}

.cg-upper-text.cg-current-upper {
    color: var(--cg-today-line);
}

.cg-lower-text {
    position: absolute;
    font-size: 12px;
    font-weight: 400;
    color: var(--cg-text-muted);
    white-space: nowrap;
    text-align: center;
    line-height: 30px;
}

.cg-lower-text.cg-current-date {
    color: var(--cg-text-primary);
    font-weight: 600;
}

/* ── Highlights ── */
.cg-today-line-svg {
    stroke: var(--cg-today-line);
    stroke-width: 1.5;
}

.cg-today-line {
    position: absolute;
    width: 1px;
    background: var(--cg-today-line);
    z-index: 2;
    pointer-events: none;
}

.cg-today-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cg-today-line);
    z-index: 3;
    pointer-events: none;
}

.cg-weekend {
    fill: var(--cg-weekend-fill);
}

.cg-ignored {
    fill: url(#cg-hatch);
    opacity: 0.5;
}

/* ── Bars ── */
.cg-bar-group {
    cursor: pointer;
}

.cg-bar-group:hover .cg-bar {
    filter: brightness(1.15);
}

.cg-bar {
    transition: filter 0.15s ease;
}

.cg-bar-progress {
    pointer-events: none;
}

.cg-bar-label {
    fill: var(--cg-text-on-bar);
    font-size: 12px;
    font-weight: 600;
    dominant-baseline: central;
    pointer-events: none;
}

.cg-bar-avatar {
    pointer-events: none;
}

/* ── Parent-child bracket connectors ── */
.cg-parent-line {
    stroke: var(--cg-parent-line-color);
    stroke-width: 1.2;
}

.cg-parent-dot {
    fill: var(--cg-parent-dot-color);
}

/* ── Task-to-task dependency arrows ── */
.cg-dep-arrow {
    fill: none;
    stroke: var(--cg-dep-arrow-color);
    stroke-width: 1.5;
}

.cg-arrowhead-fill {
    fill: var(--cg-dep-arrowhead-color);
}

/* ── Date range highlight on hover ── */
.cg-date-highlight {
    position: absolute;
    height: 100%;
    background: var(--cg-today-line);
    opacity: 0.08;
    border-radius: 4px;
    pointer-events: none;
    display: none;
}

.cg-bar-group:hover ~ .cg-date-highlight,
.cg-date-highlight.cg-visible {
    display: block;
}

/* ── Scrollbar styling ── */
.cg-container::-webkit-scrollbar {
    height: 8px;
}

.cg-container::-webkit-scrollbar-track {
    background: var(--cg-bg);
}

.cg-container::-webkit-scrollbar-thumb {
    background: var(--cg-tick-thick);
    border-radius: 4px;
}

.cg-container::-webkit-scrollbar-thumb:hover {
    background: var(--cg-text-muted);
}

/* ═══════════════════════════════════════════════════════════════════
   Page wrapper (toolbar + chart + sidebar + popup)
   ═══════════════════════════════════════════════════════════════════ */

.fg-lite-root {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 480px;
}

.fg-lite-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid var(--cg-border, #e5e7eb);
    background: var(--cg-bg, #fff);
}

.fg-lite-toolbar__group {
    display: flex;
    gap: 4px;
    align-items: center;
}

.fg-lite-btn {
    appearance: none;
    background: transparent;
    border: 1px solid var(--cg-border, #e5e7eb);
    color: var(--cg-text, #111);
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 120ms, color 120ms;
}

.fg-lite-btn:hover {
    background: var(--cg-row-even, #f9fafb);
}

.fg-lite-btn--active {
    background: var(--primary-500, #22C55E);
    border-color: var(--primary-500, #22C55E);
    color: #fff;
}

.fg-lite-btn--active:hover {
    background: var(--primary-600, #16a34a);
}

.fg-lite-body {
    display: flex;
    flex: 1 1 auto;
    min-height: 0;
}

[dir="rtl"] .fg-lite-body {
    flex-direction: row-reverse;
}

.fg-lite-sidebar {
    flex: 0 0 240px;
    border-inline-end: 1px solid var(--cg-border, #e5e7eb);
    overflow-y: auto;
    padding: 8px 0;
    background: var(--cg-bg, #fff);
}

.fg-lite-sidebar__group-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--cg-text-muted, #6b7280);
    padding: 6px 12px;
    letter-spacing: 0.04em;
}

.fg-lite-sidebar__item {
    padding: 6px 12px 6px 24px;
    font-size: 13px;
    color: var(--cg-text, #111);
    cursor: default;
}

[dir="rtl"] .fg-lite-sidebar__item {
    padding: 6px 24px 6px 12px;
}

.fg-lite-chart {
    flex: 1 1 auto;
    overflow: hidden;
    position: relative;
}

/* Popup: shown when a bar is clicked */
.fg-lite-popup {
    position: fixed;
    z-index: 9999;
    background: var(--cg-bg, #fff);
    border: 1px solid var(--cg-border, #e5e7eb);
    border-radius: 10px;
    padding: 12px 16px;
    min-width: 240px;
    max-width: 300px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    color: var(--cg-text, #111);
}

.dark .fg-lite-popup {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.fg-lite-popup__title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
}

.fg-lite-popup__dates {
    font-size: 12px;
    color: var(--cg-text-muted, #6b7280);
    margin-bottom: 8px;
}

.fg-lite-popup__progress {
    background: var(--cg-row-even, #e5e7eb);
    border-radius: 6px;
    height: 6px;
    margin-bottom: 4px;
    overflow: hidden;
}

.fg-lite-popup__progress-bar {
    height: 100%;
    border-radius: 6px;
    transition: width 200ms;
}

.fg-lite-popup__progress-label {
    font-size: 11px;
    color: var(--cg-text-muted, #6b7280);
}

/* Baseline bar (planned vs actual) — light fill + dashed outline so it
   reads as "the original plan" against the solid actual bar below it. */
.cg-bar-baseline {
    fill: rgba(99, 102, 241, 0.15);
    stroke: rgba(99, 102, 241, 0.55);
    stroke-width: 1;
    stroke-dasharray: 3 2;
}

.dark .cg-bar-baseline {
    fill: rgba(165, 180, 252, 0.18);
    stroke: rgba(165, 180, 252, 0.6);
}