* {
    box-sizing: border-box;
}

body {
    margin: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #111827;
    background: #f3f4f6;
}

.topbar {
    flex: 0 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: #ffffff;
    border-bottom: 1px solid #d1d5db;
}

.topbar > div {
    min-width: 0;
}

.top-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
}

.top-link {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 7px;
    background: #e5e7eb;
    color: #111827;
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
}

.audio-button {
    display: inline-grid;
    place-items: center;
    width: 34px;
    min-height: 34px;
    margin: 0;
    padding: 0;
    border-radius: 50%;
    background: #111827;
}

.audio-button.toggle-on {
    background: #065f46;
}

.audio-icon {
    width: 0;
    height: 0;
    margin-left: 3px;
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    border-left: 11px solid #ffffff;
}

.audio-button.toggle-on .audio-icon {
    width: 12px;
    height: 12px;
    margin-left: 0;
    border: 0;
    background: #ffffff;
    border-radius: 1px;
}

.top-link:hover {
    background: #d1d5db;
}

h1 {
    margin: 0;
    font-size: 20px;
}

.version-line {
    margin-top: 2px;
    color: #047857;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    font-weight: 700;
}

.copyright-line {
    margin-top: 2px;
    color: #4b5563;
    font-size: 12px;
    font-weight: 650;
}

h2 {
    margin: 0 0 10px;
    font-size: 15px;
}

.subtle {
    color: #6b7280;
    font-size: 13px;
}

.subtle kbd {
    display: inline-block;
    padding: 1px 6px;
    border: 1px solid #cbd5e1;
    border-bottom-width: 2px;
    border-radius: 5px;
    background: #f8fafc;
    color: #0f172a;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    line-height: 1.2;
}

.layout {
    flex: 1 1 auto;
    min-height: 0;
    min-width: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 14px;
    padding: 14px;
    overflow: hidden;
}

.viewer-panel {
    position: relative;
    min-width: 0;
    min-height: 0;
    background: #000000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.22);
}

#glCanvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

#glCanvas:active {
    cursor: grabbing;
}

#glCanvas.match-mode,
#glCanvas.match-mode:active,
#glCanvas.probe-mode,
#glCanvas.probe-mode:active,
#glCanvas.delete-mode,
#glCanvas.delete-mode:active,
#glCanvas.mask-mode,
#glCanvas.mask-mode:active {
    cursor: crosshair;
}

.cardinal-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.zoom-canvas {
    position: absolute;
    z-index: 20;
    width: 300px;
    height: 300px;
    display: none;
    border: 2px solid #facc15;
    border-radius: 6px;
    background: #000000;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55);
    image-rendering: pixelated;
    pointer-events: none;
}

.zoom-canvas.visible {
    display: block;
}

.zoom-coordinate-readout {
    position: absolute;
    z-index: 21;
    display: none;
    padding: 4px 6px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.66);
    color: #ffffff;
    font: 12px/1.25 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.9);
    pointer-events: none;
    white-space: nowrap;
}

.zoom-coordinate-readout.visible {
    display: block;
}

.rotation-widget {
    margin: 8px 0 12px;
    padding: 8px;
    border: 1px solid #d1d5db;
    border-radius: 7px;
    background: #f8fafc;
}

#rotationCanvas {
    display: block;
    width: 100%;
    aspect-ratio: 14 / 9;
}

.density-popup {
    position: absolute;
    z-index: 35;
    display: none;
    width: min(340px, calc(100% - 16px));
    padding: 6px;
    border: 1px solid rgba(148, 163, 184, 0.55);
    border-radius: 8px;
    background: rgba(8, 13, 24, 0.96);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.52);
    color: #e5e7eb;
    overflow: hidden;
}

.density-popup.visible {
    display: block;
}

.density-popup-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 6px;
    margin-bottom: 4px;
}

.density-popup-title {
    font-size: 11px;
    font-weight: 800;
}

.density-popup-subtitle {
    margin-top: 1px;
    color: #a7f3d0;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 10px;
    white-space: nowrap;
}

.density-popup button {
    flex: 0 0 auto;
    padding: 2px 6px;
    border-color: rgba(148, 163, 184, 0.6);
    background: rgba(15, 23, 42, 0.92);
    color: #e5e7eb;
    font-size: 11px;
}

#densityCanvas {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid rgba(148, 163, 184, 0.38);
    border-radius: 6px;
    background: #020617;
}

.cardinal-label {
    position: absolute;
    min-width: 28px;
    padding: 3px 6px;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.45);
    color: #ffffff;
    font-size: 13px;
    font-weight: 800;
    line-height: 1;
    text-align: center;
    text-shadow: 0 1px 3px #000000;
}

.residual-histogram {
    display: none;
    position: absolute;
    right: 12px;
    top: 12px;
    width: 260px;
    padding: 10px;
    border: 1px solid rgba(255, 90, 90, 0.75);
    border-radius: 6px;
    background: rgba(20, 0, 0, 0.78);
    color: #ffe1dd;
    font-size: 11px;
    font-weight: 700;
    line-height: 1.25;
    pointer-events: none;
}

.residual-histogram.visible {
    display: block;
}

.residual-histogram-title {
    margin-bottom: 6px;
    color: #ffb3ad;
}

.residual-scatter-svg {
    width: 240px;
    height: 180px;
    display: block;
}

.residual-scatter-axis {
    stroke: rgba(255, 225, 221, 0.8);
    stroke-width: 1;
}

.residual-scatter-grid {
    stroke: rgba(255, 225, 221, 0.2);
    stroke-width: 1;
}

.residual-scatter-point {
    fill: #ff3030;
    stroke: #ffffff;
    stroke-width: 0.7;
}

.residual-scatter-label {
    fill: #ffe1dd;
    font-size: 10px;
    font-weight: 700;
}

.grid-label {
    min-width: 0;
    padding: 2px 5px;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 700;
}

.lucky2-count-label {
    min-width: 18px;
    padding: 2px 5px;
    border-color: rgba(250, 204, 21, 0.82);
    border-radius: 5px;
    background: rgba(24, 16, 0, 0.72);
    color: #fde68a;
    font-size: 11px;
}

.lucky2-count-label-unique {
    border-color: rgba(34, 197, 94, 0.82);
    background: rgba(0, 32, 14, 0.72);
    color: #bbf7d0;
}

.lucky2-count-label-lost {
    border-color: rgba(239, 68, 68, 0.9);
    background: rgba(52, 9, 9, 0.78);
    color: #fecaca;
}

.azel-label {
    border-color: rgba(255, 210, 70, 0.55);
    color: #ffe08a;
}

.radec-label {
    border-color: rgba(95, 230, 255, 0.55);
    color: #9ff4ff;
}

.star-name-label {
    min-width: 0;
    padding: 2px 5px;
    transform: translate(0, -50%);
    border-color: rgba(145, 190, 255, 0.42);
    border-radius: 5px;
    background: rgba(0, 8, 24, 0.62);
    color: #d8e8ff;
    font-size: 11px;
    font-weight: 800;
}

.match-marker {
    position: absolute;
    width: 22px;
    height: 22px;
    transform: translate(-50%, -50%);
    border: 2px solid #33ff77;
    border-radius: 50%;
    background: transparent;
    box-shadow: 0 0 5px rgba(51, 255, 119, 0.75);
    pointer-events: none;
}

.paired-marker {
    border: 2px solid rgba(51, 255, 119, 0.62);
    border-radius: 50%;
    background: rgba(51, 255, 119, 0.08);
    box-shadow: 0 0 4px rgba(51, 255, 119, 0.45);
}

.mag-radius-2 {
    width: 4px;
    height: 4px;
}

.mag-radius-4 {
    width: 8px;
    height: 8px;
}

.mag-radius-6 {
    width: 12px;
    height: 12px;
}

.match-label {
    min-width: 0;
    padding: 1px 4px;
    border-color: rgba(51, 255, 119, 0.65);
    border-radius: 5px;
    color: #74ff9a;
    font-size: 11px;
    font-weight: 800;
}

.worst-residual-marker {
    width: 42px;
    height: 42px;
    border: 3px solid #ff2b2b;
    border-radius: 50%;
    background: transparent;
    box-shadow: 0 0 8px rgba(255, 43, 43, 0.85);
}

.worst-residual-label {
    min-width: 0;
    padding: 2px 6px;
    border-color: rgba(255, 43, 43, 0.75);
    border-radius: 5px;
    background: rgba(60, 0, 0, 0.78);
    color: #ffd2d2;
    font-size: 12px;
    font-weight: 800;
}

.match-pending {
    border-color: rgba(51, 255, 119, 0.75);
    box-shadow: 0 0 5px rgba(51, 255, 119, 0.55);
}

.centroid-preview-marker {
    width: 34px;
    height: 34px;
    border: 2px solid #5eead4;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(94, 234, 212, 0.9);
}

.centroid-preview-label {
    min-width: 0;
    padding: 2px 6px;
    border-color: rgba(94, 234, 212, 0.75);
    border-radius: 5px;
    background: rgba(0, 35, 36, 0.78);
    color: #ccfbf1;
    font-size: 11px;
    font-weight: 800;
}

.kde-position-dot {
    width: 5px;
    height: 5px;
    border: 1px solid rgba(255, 255, 255, 0.88);
    border-radius: 50%;
    background: #000000;
    box-shadow: 0 0 2px rgba(255, 255, 255, 0.85);
}

.probe-marker {
    border-color: #33ff77;
    box-shadow: 0 0 6px rgba(51, 255, 119, 0.95);
}

.catalog-pairing-marker {
    border-color: rgba(255, 60, 60, 0.62);
    box-shadow: 0 0 4px rgba(255, 60, 60, 0.42);
}

.catalog-pairing-label {
    min-width: 0;
    padding: 2px 5px;
    border-color: rgba(255, 60, 60, 0.85);
    border-radius: 5px;
    background: rgba(40, 0, 0, 0.68);
    color: #ffb3ad;
    font-size: 11px;
    font-weight: 800;
}

.star-picking-legend {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 8;
    display: grid;
    gap: 7px;
    max-width: min(330px, calc(100% - 24px));
    padding: 9px 10px;
    border: 1px solid rgba(148, 163, 184, 0.55);
    border-radius: 7px;
    background: rgba(3, 7, 18, 0.72);
    color: #f8fafc;
    font-size: 12px;
    font-weight: 750;
    line-height: 1.25;
    text-shadow: 0 1px 3px #000000;
    pointer-events: auto;
    user-select: none;
    touch-action: none;
}

.star-picking-legend[hidden] {
    display: none;
}

.star-picking-legend-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: -2px -2px 1px 0;
    cursor: move;
}

.star-picking-legend-header h2 {
    margin: 0;
    color: #ffffff;
    font-size: 13px;
}

.panel-close {
    display: inline-grid;
    place-items: center;
    flex: 0 0 auto;
    width: 24px;
    min-height: 24px;
    margin: 0;
    padding: 0;
    border: 1px solid rgba(226, 232, 240, 0.42);
    border-radius: 50%;
    background: rgba(15, 23, 42, 0.82);
    color: #ffffff;
    line-height: 1;
}

.star-picking-help-line {
    color: #e5e7eb;
}

.star-picking-help-line kbd {
    display: inline-block;
    padding: 1px 5px;
    border: 1px solid rgba(226, 232, 240, 0.72);
    border-bottom-width: 2px;
    border-radius: 5px;
    background: rgba(248, 250, 252, 0.95);
    color: #0f172a;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 11px;
    line-height: 1.1;
}

.legend-row {
    display: grid;
    grid-template-columns: 16px minmax(0, 1fr);
    align-items: center;
    gap: 8px;
}

.legend-circle {
    width: 13px;
    height: 13px;
    border: 2px solid currentColor;
    border-radius: 50%;
    background: transparent;
}

.legend-circle-green {
    color: #33ff77;
    box-shadow: 0 0 5px rgba(51, 255, 119, 0.85);
}

.legend-circle-red {
    color: #ff3c3c;
    box-shadow: 0 0 5px rgba(255, 60, 60, 0.78);
}

.detected-marker {
    width: 14px;
    height: 14px;
    border-color: rgba(255, 221, 70, 0.98);
    box-shadow: 0 0 5px rgba(255, 221, 70, 0.72);
}

.asterism-line-layer {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.asterism-line-layer line {
    stroke: rgba(255, 190, 65, 0.66);
    stroke-width: 1.6;
    stroke-dasharray: 7 6;
    vector-effect: non-scaling-stroke;
}

.support-asterism-lines line {
    stroke: rgba(34, 211, 238, 0.78);
    stroke-width: 1.25;
    stroke-dasharray: 4 5;
}

.lucky2-unique-asterism-lines line {
    stroke: rgba(34, 197, 94, 0.78);
    stroke-width: 1.7;
    stroke-dasharray: none;
}

.radius-region-marker {
    position: absolute;
    transform: translate(-50%, -50%);
    border: 2px solid rgba(0, 255, 180, 0.9);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0, 255, 180, 0.45);
}

.raw-tile-marker {
    position: absolute;
    pointer-events: none;
    box-sizing: border-box;
}

.not-star-tile-black {
    background: #000;
}

.not-star-tile-preview {
    border: 2px solid rgba(34, 211, 238, 0.9);
    background: rgba(34, 211, 238, 0.16);
    box-shadow: 0 0 8px rgba(34, 211, 238, 0.45);
}

.junk-star-finder-preview {
    border-style: dashed;
    border-color: rgba(0, 255, 180, 0.98);
}

.bad-detected-marker {
    width: 18px;
    height: 18px;
    border-color: rgba(0, 255, 180, 0.98);
    box-shadow: 0 0 6px rgba(0, 255, 180, 0.82);
}

.auto-match-marker {
    width: 16px;
    height: 16px;
    border-color: rgba(255, 170, 45, 0.95);
    box-shadow: 0 0 5px rgba(255, 170, 45, 0.7);
}

.match-instructions {
    min-height: 48px;
    margin-bottom: 10px;
    padding: 8px;
    border: 1px solid #86efac;
    border-radius: 6px;
    background: #f0fdf4;
    color: #14532d;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.35;
}

.hint {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: #e5e7eb;
    pointer-events: none;
    font-size: 18px;
}

.loading-overlay {
    display: none;
    position: absolute;
    inset: 0;
    z-index: 30;
    place-items: center;
    background: rgba(0, 0, 0, 0.35);
    pointer-events: none;
}

.loading-overlay.visible {
    display: grid;
}

.loading-box {
    width: min(420px, calc(100% - 48px));
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    background: rgba(17, 24, 39, 0.9);
    color: #f9fafb;
    font-weight: 800;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.45);
}

.loading-track {
    height: 8px;
    margin-top: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
}

.loading-bar {
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #38bdf8, #22c55e);
    transition: width 120ms ease;
}

.loading-overlay.indeterminate .loading-bar {
    width: 42%;
    animation: loading-slide 1s ease-in-out infinite;
}

@keyframes loading-slide {
    0% {
        transform: translateX(-110%);
    }
    50% {
        transform: translateX(70%);
    }
    100% {
        transform: translateX(240%);
    }
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
    overflow: auto;
    padding-right: 2px;
}

.controls section {
    padding: 12px;
    background: #ffffff;
    border: 1px solid #d1d5db;
    border-radius: 8px;
}

label {
    display: block;
    margin: 8px 0;
    font-size: 13px;
    font-weight: 600;
}

input,
select,
button {
    width: 100%;
    margin-top: 4px;
    padding: 6px 8px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font: inherit;
}

input[type="range"] {
    padding: 0;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    gap: 7px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    flex: 0 0 auto;
    width: auto;
    margin: 0;
    padding: 0;
}

button,
.file-button {
    background: #111827;
    color: white;
    border: 0;
    cursor: pointer;
    font-weight: 700;
}

button {
    min-height: 34px;
}

button.toggle-on {
    background: #065f46;
}

button.primary-action {
    background: #15803d;
}

button.primary-action:hover {
    background: #166534;
}

button.secondary-action {
    background: #2563eb;
}

button.secondary-action:hover {
    background: #1d4ed8;
}

.save-feedback {
    margin-top: 8px;
    padding: 8px 10px;
    border: 1px solid #86efac;
    border-radius: 6px;
    background: #dcfce7;
    color: #14532d;
    font-size: 12px;
    font-weight: 700;
    overflow-wrap: anywhere;
}

.save-feedback.error {
    border-color: #fca5a5;
    background: #fee2e2;
    color: #7f1d1d;
}

.quick-link-box {
    margin-top: 8px;
    padding: 8px;
    border: 1px solid #bfdbfe;
    border-radius: 6px;
    background: #eff6ff;
}

.quick-link-box label {
    margin: 0 0 6px;
}

.quick-link-box input[readonly] {
    color: #1e3a8a;
    background: #ffffff;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 11px;
}

.file-button {
    display: inline-block;
    width: auto;
    margin: 0;
    padding: 8px 12px;
    border-radius: 7px;
}

.file-button input {
    display: none;
}

.button-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
}

.button-row-2 {
    grid-template-columns: 1fr 1fr;
    margin-top: 4px;
}

.grid2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.lens-equation {
    margin: 10px 0;
    padding: 10px;
    overflow-x: auto;
    border: 1px solid #dbeafe;
    border-radius: 6px;
    background: #eff6ff;
    color: #1e3a8a;
    font-size: 12px;
    line-height: 1.45;
}

pre {
    min-height: 130px;
    margin: 0;
    white-space: pre-wrap;
    font-size: 12px;
    line-height: 1.4;
}

@media (max-width: 950px) {
    .layout {
        grid-template-columns: 1fr;
        grid-template-rows: minmax(0, 1fr) minmax(0, 45vh);
    }

    .topbar {
        align-items: flex-start;
    }

    .viewer-panel {
        min-height: 0;
    }
}