:root {
    --bg: #08090d;
    --panel: #0d1016;
    --panel-raised: #121720;
    --surface: #151b25;
    --surface-dark: #090c12;
    --line: #252e3b;
    --line-bright: #3c4859;
    --text: #f1f5f8;
    --muted: #8b98a8;
    --quiet: #536173;
    --cyan: #69e8ff;
    --cyan-deep: #1499b6;
    --effect-accent: #ef8dff;
    --effect-deep: #6422b8;
    --success: #7affb3;
    --danger: #ff6f7d;
    --pixel-shadow: 4px 4px 0 #050609;
    --mono: "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html,
body { min-height: 100%; }

body {
    margin: 0;
    min-width: 780px;
    background:
        linear-gradient(90deg, rgb(255 255 255 / 0.018) 1px, transparent 1px),
        linear-gradient(0deg, rgb(255 255 255 / 0.018) 1px, transparent 1px),
        var(--bg);
    background-size: 16px 16px;
    color: var(--text);
    font-family: var(--mono);
    overflow: hidden;
}

button,
input,
select { font: inherit; }

button,
select { cursor: pointer; }

.topbar {
    align-items: center;
    background: #0a0d12;
    border-bottom: 2px solid var(--line-bright);
    display: flex;
    height: 68px;
    justify-content: space-between;
    padding: 0 22px;
    position: relative;
    z-index: 5;
}

.topbar::after {
    background: var(--effect-accent);
    bottom: -2px;
    content: "";
    height: 2px;
    left: 22px;
    position: absolute;
    width: 82px;
}

.topbar-identity,
.topbar-meta,
.tag-row {
    align-items: center;
    display: flex;
}

.topbar-identity { gap: 11px; }

.brand-mark {
    background:
        linear-gradient(var(--effect-accent), var(--effect-accent)) 4px 0 / 8px 4px,
        linear-gradient(var(--effect-accent), var(--effect-accent)) 0 4px / 16px 8px,
        linear-gradient(var(--cyan), var(--cyan)) 4px 12px / 8px 4px;
    background-repeat: no-repeat;
    filter: drop-shadow(2px 2px 0 color-mix(in srgb, var(--effect-deep) 80%, #000));
    height: 16px;
    width: 16px;
}

h1,
p { margin: 0; }

h1 {
    font-size: 16px;
    letter-spacing: 0.045em;
    line-height: 1.2;
    text-transform: uppercase;
}

.topbar-identity p {
    color: var(--quiet);
    font-size: 8px;
    letter-spacing: 0.08em;
    margin-top: 3px;
    text-transform: uppercase;
}

.topbar-meta { gap: 14px; }
.tag-row { gap: 6px; }

.tag {
    background: color-mix(in srgb, var(--effect-accent) 13%, #0a0d12);
    border: 1px solid color-mix(in srgb, var(--effect-accent) 52%, var(--line));
    color: var(--effect-accent);
    font-size: 8px;
    font-weight: 800;
    letter-spacing: 0.09em;
    padding: 5px 8px;
    text-transform: uppercase;
}

.tag.muted {
    background: var(--surface);
    border-color: var(--line-bright);
    color: #b6c2cf;
}

.github-link {
    background: var(--surface);
    border: 1px solid var(--line-bright);
    box-shadow: 2px 2px 0 #050609;
    color: var(--text);
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.08em;
    padding: 8px 11px;
    text-decoration: none;
    text-transform: uppercase;
}

.github-link:hover,
.github-link:focus-visible {
    border-color: var(--cyan);
    color: var(--cyan);
    outline: none;
    transform: translate(-1px, -1px);
}

.app-shell {
    display: grid;
    grid-template-columns: 390px minmax(390px, 1fr);
    height: calc(100vh - 68px);
}

.panel {
    background:
        linear-gradient(135deg, rgb(255 255 255 / 0.02), transparent 32%),
        var(--panel);
    overflow-y: auto;
    padding: 16px;
    scrollbar-color: var(--line-bright) transparent;
    scrollbar-width: thin;
}

.left-panel { border-right: 2px solid var(--line-bright); }

.tool-card {
    background: var(--panel-raised);
    border: 1px solid var(--line);
    box-shadow: var(--pixel-shadow);
    margin: 0 4px 14px 0;
    padding: 14px;
    position: relative;
}

.tool-card::before {
    background: var(--quiet);
    content: "";
    height: 3px;
    left: -1px;
    position: absolute;
    top: -1px;
    width: 24px;
}

.generator-card::before,
.structure-card::before { background: var(--effect-accent); }

.section-heading {
    align-items: center;
    color: #d7dfe8;
    display: flex;
    font-size: 10px;
    font-weight: 900;
    justify-content: space-between;
    letter-spacing: 0.12em;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.step-index {
    color: var(--quiet);
    font-size: 8px;
}

.field-label,
.control-group-label {
    color: var(--muted);
    display: block;
    font-size: 8px;
    font-weight: 800;
    letter-spacing: 0.08em;
    margin: 10px 0 5px;
    text-transform: uppercase;
}

.field-label > .control-select { margin-top: 6px; }

.control-select,
.number-input {
    appearance: none;
    background-color: var(--surface-dark);
    background-image:
        linear-gradient(45deg, transparent 50%, var(--quiet) 50%),
        linear-gradient(135deg, var(--quiet) 50%, transparent 50%);
    background-position:
        calc(100% - 12px) calc(50% - 2px),
        calc(100% - 8px) calc(50% - 2px);
    background-repeat: no-repeat;
    background-size: 4px 4px, 4px 4px;
    border: 1px solid var(--line-bright);
    border-radius: 0;
    color: var(--text);
    font-size: 10px;
    min-height: 34px;
    outline: none;
    padding: 7px 24px 7px 9px;
    width: 100%;
}

.number-input {
    appearance: auto;
    background-image: none;
    padding-right: 9px;
}

.control-select:hover,
.number-input:hover { border-color: #566477; }

.control-select:focus,
.number-input:focus {
    border-color: var(--cyan);
    box-shadow: 2px 2px 0 rgb(105 232 255 / 0.18);
}

.control-select:disabled {
    color: var(--quiet);
    cursor: not-allowed;
    opacity: 0.55;
}

.control-grid.two-column {
    display: grid;
    gap: 8px;
    grid-template-columns: 1fr 1fr;
}

.control-grid .field-label { margin-top: 0; }

.seed-row {
    display: grid;
    gap: 7px;
    grid-template-columns: 1fr 36px;
}

.icon-button {
    background: var(--surface);
    border: 1px solid var(--line-bright);
    border-radius: 0;
    color: var(--cyan);
    font-size: 18px;
}

.icon-button:hover,
.icon-button:focus-visible {
    background: #19222e;
    border-color: var(--cyan);
    outline: none;
}

.button {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-bright);
    border-radius: 0;
    box-shadow: 2px 2px 0 #050609;
    color: var(--text);
    display: inline-flex;
    font-size: 9px;
    font-weight: 900;
    justify-content: center;
    letter-spacing: 0.075em;
    margin-top: 10px;
    min-height: 36px;
    padding: 0 11px;
    text-transform: uppercase;
    width: 100%;
}

.button:hover,
.button:focus-visible {
    border-color: var(--cyan);
    color: var(--cyan);
    outline: none;
    transform: translate(-1px, -1px);
}

.button:active {
    box-shadow: none;
    transform: translate(1px, 1px);
}

.button.primary {
    background: var(--cyan);
    border-color: #b9f5ff;
    color: #031117;
}

.button.primary:hover,
.button.primary:focus-visible {
    background: #9ef2ff;
    color: #031117;
}

.button.ghost { background: transparent; }
.button.compact { min-height: 34px; }

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

.palette-swatches {
    display: grid;
    gap: 4px;
    grid-template-columns: repeat(5, 1fr);
    margin: 7px 0 12px;
}

.palette-swatch {
    border: 1px solid rgb(255 255 255 / 0.18);
    box-shadow: inset -3px -3px 0 rgb(0 0 0 / 0.2);
    height: 24px;
}

.control-group { margin-top: 10px; }
.control-group-label { margin-bottom: 5px; }

.shape-control {
    border-top: 1px dashed var(--line-bright);
    margin-top: 14px;
    padding-top: 4px;
}

.shape-control-heading {
    align-items: center;
    display: flex;
    justify-content: space-between;
}

.shape-value {
    color: var(--effect-accent);
    font-size: 8px;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.shape-picker {
    display: grid;
    gap: 5px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.shape-option {
    align-items: center;
    background: var(--surface-dark);
    border: 1px solid var(--line);
    color: var(--muted);
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-height: 46px;
    min-width: 0;
    padding: 4px 2px 3px;
}

.shape-option canvas {
    height: 21px;
    min-height: 0;
    width: 21px;
}

.shape-option span {
    font-size: 6px;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
}

.shape-option:hover,
.shape-option:focus-visible {
    border-color: var(--cyan);
    color: var(--text);
    outline: none;
}

.shape-option.selected {
    background: color-mix(in srgb, var(--effect-accent) 13%, var(--surface-dark));
    border-color: var(--effect-accent);
    box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--effect-accent) 55%, transparent);
    color: var(--text);
}

.control-hint {
    color: var(--quiet);
    font-size: 7px;
    line-height: 1.45;
    margin-top: 7px;
}

.linked-selects {
    align-items: center;
    display: grid;
    gap: 6px;
    grid-template-columns: minmax(0, 1fr) 10px minmax(0, 1fr);
}

.linked-selects > span {
    color: var(--effect-accent);
    font-size: 12px;
    text-align: center;
}

.linked-selects .control-select { min-width: 0; }

.recipe-metrics {
    border-top: 1px dashed var(--line-bright);
    display: grid;
    gap: 5px 12px;
    grid-template-columns: 1fr 1fr;
    margin-top: 14px;
    padding-top: 11px;
}

.recipe-metrics span {
    color: var(--quiet);
    font-size: 8px;
    text-transform: uppercase;
}

.recipe-metrics b {
    color: #dfe7ef;
    font-size: 9px;
}

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

.export-grid .field-label { margin-top: 0; }
.export-grid .field-label:first-child { grid-column: 1 / -1; }

.export-note {
    border-left: 2px solid var(--effect-accent);
    color: var(--quiet);
    font-size: 8px;
    line-height: 1.5;
    margin-top: 12px;
    padding-left: 8px;
}

.viewport-panel {
    align-items: center;
    background:
        linear-gradient(90deg, rgb(255 255 255 / 0.028) 1px, transparent 1px),
        linear-gradient(0deg, rgb(255 255 255 / 0.028) 1px, transparent 1px),
        radial-gradient(circle at 50% 46%, color-mix(in srgb, var(--effect-deep) 10%, transparent), transparent 39%),
        #090b10;
    background-size: 24px 24px, 24px 24px, auto, auto;
    display: grid;
    grid-template-rows: 52px minmax(430px, 1fr) auto 40px;
    justify-items: center;
    min-width: 0;
    overflow-y: auto;
    position: relative;
}

.viewport-toolbar,
.viewport-footer {
    align-items: center;
    color: var(--quiet);
    display: flex;
    font-size: 9px;
    justify-content: space-between;
    letter-spacing: 0.04em;
    max-width: 560px;
    width: min(82%, 560px);
}

.viewport-toolbar > :first-child {
    color: var(--cyan);
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.canvas-stage {
    align-items: center;
    align-self: center;
    display: flex;
    flex-direction: column;
    position: relative;
}

.canvas-halo {
    background: radial-gradient(circle, color-mix(in srgb, var(--effect-accent) 20%, transparent), transparent 68%);
    filter: blur(14px);
    height: 430px;
    left: 50%;
    opacity: 0.42;
    pointer-events: none;
    position: absolute;
    top: 46%;
    transform: translate(-50%, -50%);
    width: 430px;
}

.canvas-frame {
    background-color: #15171d;
    background-image:
        linear-gradient(45deg, #1c2028 25%, transparent 25%, transparent 75%, #1c2028 75%, #1c2028),
        linear-gradient(45deg, #1c2028 25%, #252a34 25%, #252a34 75%, #1c2028 75%, #1c2028);
    background-position: 0 0, 8px 8px;
    background-size: 16px 16px;
    border: 2px solid var(--line-bright);
    box-shadow:
        7px 7px 0 rgb(0 0 0 / 0.56),
        0 0 0 5px rgb(255 255 255 / 0.018),
        0 0 80px color-mix(in srgb, var(--effect-accent) 12%, transparent);
    position: relative;
}

.canvas-frame::before,
.canvas-frame::after {
    border-color: var(--effect-accent);
    border-style: solid;
    content: "";
    height: 14px;
    pointer-events: none;
    position: absolute;
    width: 14px;
}

.canvas-frame::before {
    border-width: 2px 0 0 2px;
    left: -8px;
    top: -8px;
}

.canvas-frame::after {
    border-width: 0 2px 2px 0;
    bottom: -8px;
    right: -8px;
}

canvas {
    display: block;
    height: min(500px, calc(100vh - 225px));
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    min-height: 350px;
    width: min(500px, calc(100vh - 225px));
}

.timeline {
    background: var(--surface);
    border: 1px solid var(--line);
    height: 5px;
    margin-top: 24px;
    max-width: 500px;
    overflow: hidden;
    width: 100%;
}

.timeline span {
    background: linear-gradient(90deg, var(--effect-deep), var(--effect-accent));
    display: block;
    height: 100%;
    width: 0;
}

.stage-notes {
    color: var(--quiet);
    display: flex;
    font-size: 7px;
    justify-content: space-between;
    letter-spacing: 0.08em;
    margin-top: 7px;
    max-width: 500px;
    text-transform: uppercase;
    width: 100%;
}

.atlas-preview-shell {
    color: var(--muted);
    font-size: 8px;
    max-width: 560px;
    padding-bottom: 12px;
    width: min(82%, 560px);
}

.atlas-preview-heading {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.atlas-preview {
    background: var(--surface-dark);
    border: 1px solid var(--line);
    max-height: 114px;
    overflow: auto;
    padding: 5px;
}

.atlas-preview img {
    display: block;
    image-rendering: pixelated;
    width: 100%;
}

.notice {
    background: var(--surface);
    border: 1px solid var(--line-bright);
    bottom: 18px;
    box-shadow: 4px 4px 0 rgb(0 0 0 / 0.55);
    color: var(--text);
    font-size: 9px;
    left: 50%;
    opacity: 0;
    padding: 10px 13px;
    pointer-events: none;
    position: fixed;
    transform: translate(-50%, 8px);
    transition: opacity 120ms ease, transform 120ms ease;
    z-index: 10;
}

.notice.visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.notice[data-tone="success"] { border-color: var(--success); }
.notice[data-tone="danger"] { border-color: var(--danger); }

@media (max-width: 980px) {
    .app-shell { grid-template-columns: 350px minmax(390px, 1fr); }
    .panel { padding: 12px; }
}

@media (max-height: 780px) {
    .viewport-panel { grid-template-rows: 44px minmax(380px, 1fr) auto 34px; }
    canvas {
        height: min(410px, calc(100vh - 190px));
        min-height: 320px;
        width: min(410px, calc(100vh - 190px));
    }
    .timeline,
    .stage-notes { max-width: 410px; }
}