:root {
  /* Fonts */
  --font-heading: 'Bricolage Grotesque', system-ui, -apple-system, sans-serif;
  --font-body: 'Geist', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Colors */
  --color-bg: #fffbf0;
  --color-surface: #fffbf0;
  --color-surface2: #f2efe4;
  --color-fg: #000000;
  --color-fg-muted: #444444;
  --color-fg-inverse: #fffbf0;
  --color-border: #e6e2d3;
  --color-border-strong: #d1cdc0;
  --color-primary: #f2efe4;
  --color-primary-hover: #e6e2d3;
  --color-primary-active: #d1cdc0;
  --color-on-primary: #000000;
  --color-accent: #111111;
  --color-on-accent: #fffbf0;
  --color-success: #2F8A5B;
  --color-on-success: #FFFFFF;
  --color-warning: #9E7422;
  --color-on-warning: #FFFFFF;
  --color-danger: #A13D34;
  --color-on-danger: #FFFFFF;
  --color-info: #2868A8;
  --color-on-info: #FFFFFF;
  --color-focus-ring: #f2efe4;
}

body {
    background-color: var(--color-bg);
    color: var(--color-fg);
    font-family: var(--font-body);
    margin: 0;
    overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-fg);
}

/* Sidebar Styling */
.sidebar {
    background-color: var(--color-surface2) !important;
    border-right: 1px solid var(--color-border);
}

.sidebar .sidebar-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.sidebar h2 {
    color: var(--color-fg);
}

/* Detail Pane (Right Sidebar) - Sliding Overlay */
#detail-pane-container {
    position: fixed;
    right: 0;
    top: 0;
    width: 400px;
    height: 100vh;
    background: var(--color-surface);
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    border-left: 1px solid var(--color-border);
}

#detail-pane-container.is-open {
    transform: translateX(0);
}

.detail-pane-content {
    padding: 2.5rem;
    height: 100vh;
    overflow-y: auto;
}

.pane-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--color-fg);
}

.pane-img {
    width: 100%;
    border-radius: 4px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.detail-pane-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 2rem;
}

.btn-close-pane {
    background: var(--color-surface2);
    border: 1px solid var(--color-border);
    color: var(--color-fg);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    font-family: var(--font-body);
}

.btn-close-pane:hover {
    background: var(--color-fg);
    color: var(--color-surface);
    border-color: var(--color-fg);
    transform: translateY(-1px);
}

/* D3 Visualization */
#cluster-viz-container {
    width: 100%;
    height: 100vh;
    background: var(--color-bg);
    overflow: hidden;
    position: relative;
    cursor: grab;
}

.btn-fit-view {
    position: absolute;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-fg);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
}

.btn-fit-view:hover {
    background: var(--color-fg);
    color: var(--color-surface);
    border-color: var(--color-fg);
}

/* D3 Tooltip */
.d3-tooltip {
    position: fixed !important;
    top: 0;
    left: 0;
    padding: 10px 14px;
    background: var(--color-accent);
    color: var(--color-on-accent);
    border-radius: 4px;
    font-size: 0.85rem;
    pointer-events: none;
    z-index: 99999;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    max-width: 250px;
    font-family: var(--font-body);
    display: none;
}

.cluster-label {
    transition: opacity 0.2s, font-size 0.2s;
    cursor: pointer;
}

.cluster-label:hover {
    opacity: 1 !important;
    font-size: 16px !important;
}

/* Metadata Labels */
.modal-detail-label {
    font-weight: 700;
    color: var(--color-fg-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
    margin-top: 1.5rem;
}

.modal-detail-row {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: var(--color-fg);
}

/* V&A Website Button */
.btn-dark {
    background-color: var(--color-accent);
    color: var(--color-on-accent);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.btn-dark:hover {
    background-color: var(--color-fg);
}