:root {
    --board-w: 1600px;
    --board-h: 900px;
    --title-h: 116px;
    --gap: 16px;
    --left-w: 900px;
    --right-w: 668px;
    --print-row-h: 255px;
    --header-bg: #1b1f2a;
    --header-border: #2a3142;
    --header-text: #f8fafc;
}

@font-face {
    font-family: "UCL Sans";
    src: local("UCL Sans"), local("Arial");
    font-display: swap;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    background: #000000;
    color: #ffffff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
}

#viewport {
    width: 100vw;
    height: 100vh;
    padding: 24px;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: #000000;
}

#board-shell {
    position: relative;
    width: var(--board-w);
    height: var(--board-h);
    overflow: hidden;
    background: #000000;
}

#board {
    position: absolute;
    left: 0;
    top: 0;
    width: var(--board-w);
    height: var(--board-h);
    transform-origin: top left;
    background: #000000;
    overflow: hidden;
}

.board-title {
    position: absolute;
    left: 24px;
    right: 24px;
    top: 14px;
    height: 88px;
    border-radius: 14px;
    background: var(--header-bg);
    border: 1px solid var(--header-border);
    box-shadow: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 2;
    pointer-events: none;
    color: var(--header-text);
}

.board-title-main {
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 31px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.03;
}

.board-title-sub {
    margin-top: 5px;
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.15;
    color: #e2e8f0;
}

.title-guide-line {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    border-bottom: 1px dashed #2d3748;
}

.title-guide-center-tick {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -8px;
    width: 0;
    height: 16px;
    border-left: 1px dashed #334155;
}

body.hide-title-guide .title-guide-line,
body.hide-title-guide .title-guide-center-tick {
    display: none;
}

/* Main content styles */
.board-main {
    position: absolute;
    inset: var(--title-h) 0 0 0;
    transition: filter 0.3s ease;
}

/* Background blur during zoom overlay */
body.board-blurred .board-main,
body.board-blurred .board-title {
    filter: blur(12px) grayscale(20%);
    pointer-events: none;
}

/* Overlay and Lightbox container */
#zoom-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background-color: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.25s ease-out forwards;
    backdrop-filter: blur(4px);
}

.zoom-overlay-content {
    width: 90vw;
    height: 85vh;
    max-width: 1400px;
    max-height: 900px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: zoomIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Overriding panel layout rules to make cards look majestic when zoomed in */
#zoom-overlay .zoomed-active-card {
    width: 100% !important;
    height: 100% !important;
    max-width: none !important;
    max-height: none !important;
    aspect-ratio: auto !important;
    border: 3px solid var(--header-border) !important;
    border-radius: 20px !important;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8) !important;
}

#zoom-overlay .zoomed-active-card .panel-header {
    height: 56px !important;
    font-size: 28px !important;
    border-bottom: 2px solid var(--header-border) !important;
}

/* Keyframes animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.85) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.left-column,
.right-column {
    position: absolute;
    top: var(--gap);
    height: calc(var(--board-h) - var(--title-h) - (var(--gap) * 2));
}

.left-column {
    left: var(--gap);
    width: var(--left-w);
}

.right-column {
    right: var(--gap);
    width: var(--right-w);
}

.right-stack {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-rows: minmax(0, 1fr) 170px;
    gap: var(--gap);
}

.a4-row {
    display: flex;
    gap: var(--gap);
    width: 100%;
    height: var(--print-row-h);
}

.projection-row {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(var(--print-row-h) + var(--gap));
    bottom: 0;
    display: flex;
    gap: var(--gap);
    align-items: stretch;
    justify-content: space-between;
}

.panel-frame {
    --tx: 0px;
    --ty: 0px;
    --scale: 1;
    background: #ffffff;
    border: 2px solid #cbd5e1;
    border-radius: 14px;
    overflow: hidden;
    display: grid;
    grid-template-rows: 44px 1fr;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.40);
    transform: translate(var(--tx), var(--ty)) scale(var(--scale));
    transform-origin: center center;
    will-change: transform;
}

.a4-frame {
    width: calc((100% - (var(--gap) * 2)) / 3);
    aspect-ratio: 297 / 210;
    display: block;
    overflow: hidden;
}

.a3-frame {
    width: calc((100% - (var(--gap) * 2)) / 3);
    aspect-ratio: 297 / 420;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--header-text);
    letter-spacing: 0;
}

.panel-header-ucl {
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-weight: 700;
}

.panel-body {
    position: relative;
    background: #ffffff;
}

.panel-body iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
    background: #ffffff;
}

.synthesis-frame {
    width: 100%;
    height: 100%;
}

.recommendation-frame {
    width: 100%;
    height: 100%;
    border-color: var(--header-border);
    grid-template-rows: 44px 1fr;
}

.recommendation-body {
    padding: 12px 16px;
    background: #ffffff;
    color: #111827;
}

.recommendation-title {
    margin: 0 0 8px 0;
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #361a54;
}

.recommendation-list {
    margin: 0;
    padding-left: 20px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    list-style: disc;
}

.recommendation-list li {
    font-size: 14px;
    line-height: 1.18;
    font-weight: 600;
}

.synthesis-body {
    position: relative;
}

.synthesis-body iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
    background: #ffffff;
}

.qr-block {
    position: absolute;
    top: 8px;
    right: 16px;
    width: 122px;
    height: auto;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--header-border);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 6px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

.qr-author {
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 10px;
    font-weight: 700;
    color: #1e293b;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 4px;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
    width: 100%;
    padding-bottom: 3px;
}

.qr-label {
    font-family: "UCL Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 9px;
    font-weight: 700;
    color: #64748b;
    margin-top: 4px;
    text-align: center;
    letter-spacing: 0.01em;
}

.qr-code {
    width: 96px;
    height: 96px;
    display: block;
    object-fit: contain;
}

.toggle-controls {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 5000;
    border: 0;
    border-radius: 999px;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 700;
    color: #f8fafc;
    background: rgba(15, 23, 42, 0.9);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
    cursor: pointer;
}

.controls {
    position: fixed;
    left: 16px;
    top: 16px;
    width: 320px;
    max-height: calc(100vh - 32px);
    overflow: auto;
    z-index: 5000;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.45);
    background: rgba(2, 6, 23, 0.9);
    color: #e2e8f0;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
}

.controls:not(.is-open) {
    display: none;
}

.controls h2 {
    margin: 0 0 10px 0;
    font-size: 16px;
}

.controls label,
.controls select,
.controls input,
.controls button {
    display: block;
    width: 100%;
}

.controls label {
    margin-top: 10px;
    margin-bottom: 6px;
    font-size: 13px;
    color: #cbd5e1;
}

.controls select,
.controls input[type="range"] {
    accent-color: #38bdf8;
}

.controls select,
.controls input,
.controls button {
    margin-bottom: 8px;
}

.controls button {
    border: 0;
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 13px;
    font-weight: 700;
    color: #0f172a;
    background: #cbd5e1;
    cursor: pointer;
}

.control-row {
    display: flex;
    gap: 8px;
}

.check-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
}

.check-row input {
    width: auto;
    margin: 0;
}

.check-row label {
    margin: 0;
    width: auto;
}

.readout {
    font-size: 12px;
    color: #94a3b8;
    margin-bottom: 8px;
}

.diagnostics {
    margin-top: 10px;
    padding: 10px;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(71, 85, 105, 0.7);
    white-space: pre-line;
    font-size: 12px;
    line-height: 1.35;
    color: #cbd5e1;
}

.controls-hint {
    margin: 10px 0 0 0;
    font-size: 12px;
    color: #94a3b8;
}

.debug-marker {
    position: fixed;
    right: 16px;
    top: 16px;
    z-index: 6000;
    font-size: 11px;
    letter-spacing: 0.03em;
    color: #0f172a;
    background: #f8fafc;
    border-radius: 999px;
    padding: 4px 8px;
    opacity: 0.9;
}

.a4-frame iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}