:root {
    --situation-hub-page-inline: 24px;
    --situation-hub-page-max-width: 2200px;
    --situation-hub-sidebar-width: 260px;
    --situation-hub-sidebar-inline: 20px;
    --situation-hub-sidebar-block: 28px;
    --situation-hub-content-space: 24px;
    --situation-hub-title-size: 28px;
    --situation-hub-level-size: 15px;
    --situation-hub-section-size: 14px;
    --situation-hub-control-height: 48px;
    --situation-hub-touch-height: 44px;
    --situation-hub-level-width: 100%;
    --situation-hub-nav-text: var(--text);
    --situation-hub-on-accent: var(--surface);
    --situation-hub-focus-ring: var(--accent-soft);
    --situation-hub-active-shadow: var(--shadow-sm);
    --situation-hub-selected-line: var(--line);
}

.situation-hub-page {
    width: min(100%, var(--situation-hub-page-max-width));
    margin: 0 auto;
    padding: 0 var(--situation-hub-page-inline);
}

.situation-hub-shell {
    display: grid;
    grid-template-columns: var(--situation-hub-sidebar-width) minmax(0, 1fr);
    min-height: calc(100vh - 8.5rem);
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-panel);
    background: var(--surface);
    box-shadow: var(--shadow-md);
}

.situation-hub-sidebar {
    padding: var(--situation-hub-sidebar-block) var(--situation-hub-sidebar-inline);
    border-right: 1px solid var(--line);
    background: var(--surface);
}

.situation-hub-title {
    margin: 0 6px 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
    color: var(--text);
    font-size: var(--situation-hub-title-size);
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -0.045em;
}

.situation-hub-level-one,
.situation-hub-level-two {
    display: grid;
    gap: 8px;
}

.situation-hub-level-item {
    display: grid;
    width: var(--situation-hub-level-width);
    gap: 4px;
}

.situation-hub-level-button,
.situation-hub-section-button {
    width: var(--situation-hub-level-width);
    min-height: var(--situation-hub-control-height);
    border: 1px solid transparent;
    border-radius: var(--radius-control);
    background: var(--surface);
    color: var(--situation-hub-nav-text);
    font-size: var(--situation-hub-level-size);
    font-weight: 800;
    text-align: left;
}

.situation-hub-level-button {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 12px 14px;
}

.situation-hub-level-button:hover,
.situation-hub-section-button:hover {
    background: var(--bg);
}

.situation-hub-level-button[aria-current="page"] {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--situation-hub-on-accent);
    box-shadow: var(--situation-hub-active-shadow);
}

.situation-hub-level-button:focus-visible,
.situation-hub-section-button:focus-visible {
    outline: 3px solid var(--situation-hub-focus-ring);
    outline-offset: 2px;
}

.situation-hub-level-two-wrap {
    position: relative;
    margin: 2px 0 4px 20px;
    padding: 2px 0 2px 20px;
}

.situation-hub-level-two-wrap::before {
    position: absolute;
    inset: 0 auto 0 5px;
    width: 1px;
    background: var(--line);
    content: "";
}

.situation-hub-section-button {
    position: relative;
    padding: 10px 12px;
    font-size: var(--situation-hub-section-size);
}

.situation-hub-section-button::before {
    position: absolute;
    top: 50%;
    left: -20px;
    width: 11px;
    height: 1px;
    background: var(--line);
    content: "";
}

.situation-hub-section-button[aria-current="page"] {
    border-color: var(--situation-hub-selected-line);
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.situation-hub-content {
    min-width: 0;
    padding: var(--situation-hub-content-space);
    background: var(--bg);
}

.situation-hub-content .workreport-workspace-embedded {
    width: 100%;
    padding-bottom: 0;
}

.situation-hub-placeholder {
    min-height: 280px;
    display: grid;
    place-items: center;
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: var(--radius-panel);
    background: var(--surface);
    color: var(--muted);
    text-align: center;
}

.situation-calendar-command {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-panel);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.situation-command-header,
.situation-command-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.situation-command-header {
    padding: 18px 20px;
    border-bottom: 1px solid var(--line);
}

.situation-command-header p {
    margin: 0;
    color: var(--accent-strong);
    font-size: 11px;
    font-weight: 900;
}

.situation-command-header h2 {
    margin: 3px 0 0;
    font-size: 22px;
    font-weight: 900;
    letter-spacing: -0.035em;
}

.situation-command-header span,
.situation-command-selected {
    color: var(--muted);
    font-size: 12px;
}

.situation-command-month {
    display: flex;
    align-items: center;
    gap: 10px;
}

.situation-command-month button {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: var(--radius-control);
    background: var(--surface);
    color: var(--muted);
}

.situation-command-month strong {
    min-width: 150px;
    text-align: center;
    font-size: 22px;
}

.situation-command-toolbar {
    padding: 12px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
}

.situation-command-filters,
.situation-command-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.situation-command-content {
    gap: 0;
}

.situation-command-calendar {
    display: flex;
    flex: 1;
    min-height: 0;
    padding: 12px;
    flex-direction: column;
}

.situation-command-selected {
    padding: 0 0 9px;
}

.situation-command-selected strong { color: var(--text); }

.situation-command-events {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
}

.situation-command-events > div {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

@media (min-width: 1100px) {
    .situation-command-content { grid-template-columns: minmax(0, 1fr) 310px; }

    .situation-command-content .situation-board-panel {
        display: block;
        padding: 16px;
        border-left: 1px solid var(--line);
        background: var(--surface);
    }
}

@media (max-width: 840px) {
    .situation-hub-page { padding: 0 16px; }

    .situation-hub-shell { grid-template-columns: 1fr; }

    .situation-hub-sidebar {
        padding: 18px;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .situation-hub-title {
        margin: 0 0 14px;
        padding-bottom: 14px;
        font-size: 24px;
    }

    .situation-hub-level-one {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .situation-hub-level-item { display: contents; }

    .situation-hub-level-button {
        justify-content: center;
        text-align: center;
        order: 1;
    }

    .situation-hub-level-two-wrap {
        grid-column: 1 / -1;
        order: 2;
        margin: 10px 0 0;
        padding: 0;
    }

    .situation-hub-level-two-wrap::before,
    .situation-hub-section-button::before { display: none; }

    .situation-hub-level-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    .situation-hub-section-button { text-align: center; }
}

@media (max-width: 560px) {
    .situation-hub-page { padding: 0 10px; }

    .situation-hub-sidebar,
    .situation-hub-content { padding: 14px; }

    .situation-hub-level-one {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 8px;
    }

    .situation-hub-level-button {
        width: var(--situation-hub-level-width);
        min-width: 0;
        min-height: var(--situation-hub-touch-height);
        padding: 10px 13px;
        white-space: nowrap;
    }

    .situation-hub-level-button i { display: none; }

    .situation-hub-section-button { min-height: var(--situation-hub-touch-height); }
}

@media (prefers-reduced-motion: reduce) {
    .situation-hub-level-button,
    .situation-hub-section-button { transition: none; }
}