/* Citation Network Explorer — dark theme.
   Colour tokens follow the validated reference palette (dark-surface steps). */

:root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #232322;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --accent-2: #d95926;
    --danger: #d03b3b;
    --radius: 8px;
    --topbar-h: 52px;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
    background: var(--page);
    color: var(--ink);
    overflow: hidden;
}

.hidden {
    display: none !important;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

select,
input,
textarea {
    font: inherit;
    color: var(--ink);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 5px 8px;
    outline: none;
}

select:focus,
input:focus,
textarea:focus {
    border-color: var(--accent);
}

a {
    color: var(--accent);
}

/* ---------- Top bar ---------- */

#topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0 14px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 30;
}

#brand {
    font-weight: 600;
    white-space: nowrap;
    color: var(--ink);
}

#search-wrap {
    position: relative;
    flex: 1;
    max-width: 620px;
}

#search {
    width: 100%;
}

#search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-height: 60vh;
    overflow-y: auto;
    z-index: 40;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.search-result {
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    gap: 8px;
    align-items: baseline;
    border-bottom: 1px solid var(--grid);
}

.search-result:last-child {
    border-bottom: none;
}

.search-result:hover,
.search-result.active {
    background: rgba(57, 135, 229, 0.15);
}

.search-result .type {
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--accent);
    min-width: 70px;
}

.search-result .name {
    color: var(--ink);
}

.search-result .hint-text {
    color: var(--muted);
    font-size: .8rem;
}

#view-switcher {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

#view-switcher button {
    padding: 6px 14px;
    color: var(--ink-2);
    border-right: 1px solid var(--border);
}

#view-switcher button:last-child {
    border-right: none;
}

#view-switcher button.active {
    background: var(--accent);
    color: #fff;
}

#ai-toggle {
    padding: 6px 14px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    color: var(--accent);
    white-space: nowrap;
}

#ai-toggle:hover,
#ai-toggle.active {
    background: var(--accent);
    color: #fff;
}

/* ---------- Viz area ---------- */

#viz {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
}

.view {
    position: absolute;
    inset: 0;
}

#view-plots {
    overflow-y: auto;
    padding: 72px 18px 18px;
}

#plots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
    gap: 16px;
    max-width: 1500px;
    margin: 0 auto;
}

.plot-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px;
    overflow-x: auto;
}

.plot-card.highlighted {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(57, 135, 229, 0.4);
}

.overlay {
    position: absolute;
    z-index: 10;
}

#entity-banner {
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(26, 26, 25, 0.9);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 18px;
    text-align: center;
    max-width: 70%;
}

#entity-banner .entity-name {
    font-size: 1.05rem;
    font-weight: 600;
}

#entity-banner .entity-meta {
    font-size: .78rem;
    color: var(--ink-2);
}

/* ---------- Controls panel ---------- */

#controls {
    right: 14px;
    top: 14px;
    width: 230px;
    background: rgba(26, 26, 25, 0.92);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    font-size: .85rem;
}

.panel-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--ink-2);
}

#controls label {
    display: block;
    margin: 8px 0 2px;
    color: var(--ink-2);
}

#controls select {
    width: 100%;
    margin-top: 2px;
}

#legend {
    margin-top: 10px;
    font-size: .72rem;
    color: var(--ink-2);
}

.legend-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 2px 0;
}

.legend-swatch {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex: none;
}

.legend-ramp {
    display: flex;
    height: 10px;
    border-radius: 3px;
    overflow: hidden;
    margin: 4px 0 2px;
}

.legend-ramp div {
    flex: 1;
}

.legend-minmax {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
}

/* ---------- Canvas axis panel ---------- */

#canvas-controls {
    left: 14px;
    top: 14px;
    width: 230px;
    background: rgba(26, 26, 25, 0.92);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    font-size: .85rem;
}

#canvas-controls label {
    display: block;
    margin: 8px 0 2px;
    color: var(--ink-2);
}

#canvas-controls select {
    width: 100%;
    margin-top: 2px;
}

#canvas-controls .hint {
    margin-top: 8px;
}

/* ---------- Timeline ---------- */

#timeline-wrap {
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    background: rgba(26, 26, 25, 0.92);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 4px 8px 2px;
}

#timeline-wrap .hint {
    text-align: center;
    padding-bottom: 3px;
}

.hint {
    font-size: .68rem;
    color: var(--muted);
}

/* ---------- Tooltip ---------- */

#tooltip {
    position: fixed;
    z-index: 50;
    pointer-events: none;
    background: rgba(26, 26, 25, 0.95);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    max-width: 380px;
    font-size: .78rem;
    color: var(--ink-2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

#tooltip b {
    color: var(--ink);
}

.nodetooltip {
    background: rgba(26, 26, 25, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    padding: 8px 10px;
    max-width: 380px;
    font-size: .78rem;
    color: #c3c2b7;
}

.nodetooltip b {
    color: #fff;
}

/* ---------- Loading ---------- */

#loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: rgba(13, 13, 13, 0.6);
    z-index: 20;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--grid);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

#loading-text {
    color: var(--ink-2);
    font-size: .85rem;
}

/* ---------- AI panel ---------- */

#ai-panel {
    position: fixed;
    top: var(--topbar-h);
    right: 0;
    bottom: 0;
    width: 380px;
    max-width: 100vw;
    background: var(--surface);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 25;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    color: var(--ink-2);
}

.panel-header button {
    color: var(--muted);
    font-size: 1.1rem;
    padding: 0 4px;
}

.panel-header button:hover {
    color: var(--ink);
}

#ai-settings {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    font-size: .82rem;
}

#ai-settings label {
    display: block;
    margin-bottom: 8px;
    color: var(--ink-2);
}

#ai-settings input:not([type="checkbox"]),
#ai-settings select {
    width: 100%;
    margin-top: 3px;
}

#ai-settings {
    max-height: 45vh;
    overflow-y: auto;
}

.provider-fields {
    border-left: 2px solid var(--grid);
    padding-left: 10px;
    margin: 6px 0 10px;
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 6px;
}

.checkbox-label input {
    width: auto !important;
}

#ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: .86rem;
}

.ai-msg {
    padding: 8px 12px;
    border-radius: 10px;
    max-width: 92%;
    line-height: 1.45;
    white-space: pre-wrap;
    overflow-wrap: break-word;
}

.ai-msg.user {
    align-self: flex-end;
    background: #1c5cab;
    color: #fff;
}

.ai-msg.assistant {
    align-self: flex-start;
    background: var(--surface-2);
    color: var(--ink-2);
}

.ai-msg.assistant code {
    background: var(--page);
    padding: 1px 4px;
    border-radius: 3px;
}

.ai-msg.tool {
    align-self: flex-start;
    font-size: .72rem;
    color: var(--muted);
    background: none;
    padding: 0 6px;
}

.ai-msg.error {
    align-self: stretch;
    background: rgba(208, 59, 59, 0.15);
    border: 1px solid var(--danger);
    color: var(--ink-2);
    font-size: .78rem;
}

.ai-msg.thinking {
    align-self: flex-start;
    color: var(--muted);
    font-style: italic;
    background: none;
}

#ai-form {
    display: flex;
    gap: 6px;
    padding: 10px;
    border-top: 1px solid var(--border);
    align-items: flex-end;
}

#ai-input {
    flex: 1;
    resize: none;
    max-height: 120px;
}

#ai-mic,
#ai-send {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--ink-2);
}

#ai-mic.listening {
    border-color: var(--danger);
    color: var(--danger);
    animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
    50% {
        opacity: 0.4;
    }
}

#ai-send:hover,
#ai-mic:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ---------- Modal ---------- */

#modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 60;
}

#modal {
    width: min(680px, 92vw);
    max-height: 84vh;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
}

#modal-title {
    padding-right: 12px;
}

#modal-body {
    padding: 14px 16px;
    overflow-y: auto;
    font-size: .88rem;
    color: var(--ink-2);
    line-height: 1.5;
}

#modal-body .chips {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin: 6px 0;
}

#modal-body .chip {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px 10px;
    font-size: .72rem;
}

#modal-body .modal-actions {
    margin-top: 12px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

#modal-body .modal-actions button {
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 6px;
    padding: 5px 12px;
    font-size: .8rem;
}

#modal-body .modal-actions button:hover {
    background: var(--accent);
    color: #fff;
}

#modal-body .work-row {
    padding: 5px 0;
    border-bottom: 1px solid var(--grid);
    cursor: pointer;
}

#modal-body .work-row:hover {
    color: var(--ink);
}

/* ---------- Toasts ---------- */

#toasts {
    position: fixed;
    top: calc(var(--topbar-h) + 10px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 70;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.toast {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 6px;
    padding: 8px 16px;
    font-size: .82rem;
    color: var(--ink-2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.toast.error {
    border-left-color: var(--danger);
}

/* ---------- Small screens ---------- */

@media (max-width: 800px) {
    #brand {
        display: none;
    }

    #controls {
        width: 190px;
        font-size: .78rem;
    }

    #ai-panel {
        width: 100vw;
    }

    #timeline-wrap {
        display: none;
    }
}