/* ── Graph tab ─────────────────────────────────────────────────────────────── */

#tab-graph {
    height: calc(100vh - 56px);
    overflow: hidden;
    display: none;
}

#tab-graph.active {
    display: block;
}

#graph-container {
    position: relative;
    width: 100%;
    height: 100%;
    background: var(--bg);
    overflow: hidden;
}

#graph-container svg {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

#graph-container svg:active {
    cursor: grabbing;
}

/* ── Toolbar ──────────────────────────────────────────────────────────────── */
.graph-toolbar {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(250, 248, 245, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 40px;
    padding: 5px 6px 5px 7px;
    box-shadow: 0 2px 16px rgba(42, 36, 32, 0.1);
    /* size to content on desktop — no overflow issues */
    width: max-content;
    max-width: calc(100vw - 32px);
}

/* Legend items — no mask on desktop, all pills visible */
.graph-legend-items {
    display: flex;
    align-items: center;
    gap: 3px;
}

.graph-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--sans);
    font-size: 0.72rem;
    font-weight: 400;
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

.graph-pill.active {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

.graph-pill[data-type="condition"] {
    cursor: default;
}

.graph-pill-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
    opacity: 0.5;
    transition: opacity 0.15s;
}

.graph-pill.active .graph-pill-dot {
    opacity: 1;
}

/* ── Reset button ─────────────────────────────────────────────────────────── */
.graph-reset {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
    margin-left: 4px;
    padding: 4px;
    -webkit-tap-highlight-color: transparent;
}

.graph-reset:hover {
    background: var(--light);
    color: var(--accent);
    border-color: #b7e4c7;
}

/* ── Info panel — desktop ─────────────────────────────────────────────────── */
.graph-info {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 20;
    background: rgba(250, 248, 245, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 18px;
    max-width: 280px;
    box-shadow: 0 2px 20px rgba(42, 36, 32, 0.12);
    transition: opacity 0.2s, transform 0.2s;
}

.graph-info.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(6px);
}

.info-header {
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.info-title {
    font-family: var(--serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.3;
    padding: 2px 0 10px;
}

.info-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 8px;
}

.info-group:last-child {
    margin-bottom: 0;
}

.info-group-label {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.info-group-items {
    font-size: 0.78rem;
    color: var(--muted);
    line-height: 1.5;
}

/* ── Hint ─────────────────────────────────────────────────────────────────── */
.graph-hint {
    position: absolute;
    top: 10px;
    right: 20px;
    z-index: 10;
    font-family: var(--sans);
    font-size: 0.72rem;
    color: var(--muted);
    pointer-events: none;
    transition: opacity 0.3s;
    font-style: italic;
    opacity: 0.6;
}

.graph-hint.hidden {
    opacity: 0;
}

/* ── Mobile ───────────────────────────────────────────────────────────────── */
@media (max-width: 720px) {

    /* Toolbar: full width, pills SCROLL horizontally, zero visible scrollbar */
    .graph-toolbar {
        top: 10px;
        left: 12px;
        right: 12px;
        width: auto;
        transform: none;
        max-width: none;
        padding: 3px 4.5px 3px 7px;
        overflow: hidden;
        /* clips the pill list */
    }

    .graph-legend-items {
        flex: 1;
        min-width: 0;
        /* scrollable but no scrollbar — this is the key: overflow-x auto + hide scrollbar */
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: none;
        /* Firefox */
        -ms-overflow-style: none;
        /* IE/Edge */
        /* right fade to signal overflow — only visible when there's overflow */
        -webkit-mask-image: linear-gradient(to right, black calc(100% - 24px), transparent 100%);
        mask-image: linear-gradient(to right, black calc(100% - 24px), transparent 100%);
        padding-right: 5px;
        -webkit-tap-highlight-color: transparent;
    }

    /* Hide webkit scrollbar on the pill list */
    .graph-legend-items::-webkit-scrollbar {
        display: none;
    }

    .graph-pill {
        font-size: 0.65rem;
        padding: 3px 8px;
    }

    /* Bottom sheet — transform-only transitions, no opacity conflict with .hidden */
    .graph-info {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        max-width: none;
        max-height: 50vh;
        border-radius: 28px 28px 0 0;
        border-left: none;
        border-right: none;
        border-bottom: none;
        padding: 10px 20px 40px;
        overflow-y: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        /* transform-only transition — reliable on iOS Safari */
        transition: transform 0.32s cubic-bezier(0.32, 0.72, 0, 1);
        transform: translateY(0);
        /* opacity must stay 1 on mobile — .hidden uses transform only */
        opacity: 1 !important;
        pointer-events: auto;
        /* prevent pull-to-refresh from triggering when dragging the sheet */
        overscroll-behavior: contain;
    }

    .graph-info::-webkit-scrollbar {
        display: none;
    }

    /* hidden = slid fully below viewport */
    .graph-info.hidden {
        transform: translateY(110%);
        pointer-events: none;
    }

    .graph-hint {
        display: none;
    }
}