:root {
    color-scheme: dark;
    --bg: #090b17;
    --surface: rgba(22, 25, 48, 0.88);
    --surface-strong: #171a32;
    --field: rgba(255, 255, 255, 0.055);
    --border: rgba(255, 255, 255, 0.12);
    --text: #f6f4ff;
    --muted: #a9abc2;
    --accent: #ff5470;
    --accent-2: #35d0ba;
    --danger: #ff7890;
    --focus: #8c7dff;
    --shadow: 0 1.4rem 4rem rgba(0, 0, 0, 0.35);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    min-width: 18rem;
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(circle at 8% 0%, rgba(255, 84, 112, 0.15), transparent 26rem),
        radial-gradient(circle at 90% 20%, rgba(53, 208, 186, 0.12), transparent 30rem),
        var(--bg);
}

button,
input,
select {
    font: inherit;
}

button,
select,
input[type="number"],
input[type="text"] {
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    color: var(--text);
    background: var(--field);
}

button {
    min-height: 2.6rem;
    padding: 0.55rem 0.8rem;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 750;
    transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

button:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
}

button:active {
    transform: translateY(1px);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

input[type="number"],
input[type="text"],
select {
    width: 100%;
    min-height: 2.5rem;
    padding: 0.48rem 0.62rem;
}

input[type="color"] {
    width: 3rem;
    height: 2.4rem;
    padding: 0.16rem;
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    background: transparent;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

code {
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
    color: #fff;
    background: rgba(255, 255, 255, 0.09);
}

h1,
h2,
h3,
p {
    margin: 0;
}

h1 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    letter-spacing: -0.04em;
}

h2 {
    font-size: clamp(1.05rem, 2vw, 1.35rem);
}

h3 {
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

.eyebrow {
    color: var(--accent-2);
    font-size: 0.64rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.topbar {
    position: relative;
    z-index: 30;
    display: flex;
    min-height: 5rem;
    padding: 0.85rem clamp(1rem, 3vw, 2.5rem);
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    background: rgba(9, 11, 23, 0.82);
    backdrop-filter: blur(1rem);
}

.brand,
.top-actions,
.drawer-heading,
.section-heading,
.workspace-toolbar,
.view-actions,
.workspace-footer {
    display: flex;
    align-items: center;
}

.brand {
    gap: 0.8rem;
}

.brand p {
    color: var(--muted);
    font-size: 0.68rem;
}

.brand-mark {
    width: 2.75rem;
    aspect-ratio: 1;
    border: 2px solid var(--accent);
    border-radius: 0.8rem;
    background:
        linear-gradient(90deg, transparent 42%, var(--accent-2) 42% 58%, transparent 58%),
        linear-gradient(0deg, transparent 42%, var(--accent) 42% 58%, transparent 58%);
    box-shadow: 0 0 1.6rem rgba(255, 84, 112, 0.2);
    transform: rotate(8deg);
}

.top-actions {
    gap: 0.55rem;
}

.app-shell {
    display: grid;
    min-height: calc(100vh - 5rem);
    grid-template-columns: minmax(18rem, 23rem) minmax(0, 1fr);
}

.controls {
    position: relative;
    z-index: 10;
    max-height: calc(100vh - 5rem);
    padding: 1rem;
    overflow-y: auto;
    border-right: 1px solid var(--border);
    background: rgba(15, 17, 34, 0.92);
    scrollbar-color: rgba(255, 255, 255, 0.25) transparent;
}

.drawer-heading,
.section-heading,
.workspace-toolbar,
.workspace-footer {
    justify-content: space-between;
    gap: 1rem;
}

.control-section {
    display: grid;
    margin-top: 0.85rem;
    padding: 0.9rem;
    gap: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.95rem;
    background: rgba(255, 255, 255, 0.025);
}

details.control-section {
    display: block;
}

details[open] .details-content {
    margin-top: 0.8rem;
}

summary {
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 800;
}

.field,
.field label {
    display: grid;
    gap: 0.32rem;
}

.field > span,
.color-row label > span {
    color: #dedcf0;
    font-size: 0.69rem;
    font-weight: 750;
}

.field small {
    color: var(--muted);
    font-size: 0.62rem;
    line-height: 1.45;
}

.field .field-error {
    min-height: 0.9rem;
    color: var(--danger);
}

.field.has-error input {
    border-color: var(--danger);
    box-shadow: 0 0 0 2px rgba(255, 120, 144, 0.14);
}

.field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
}

.range-field > span {
    display: flex;
    justify-content: space-between;
}

output {
    color: var(--accent-2);
    font-variant-numeric: tabular-nums;
    font-weight: 800;
}

.text-button {
    min-height: auto;
    padding: 0.25rem 0.45rem;
    border: 0;
    color: var(--accent-2);
    background: transparent;
}

.color-list {
    display: grid;
    gap: 0.75rem;
}

.color-row {
    display: grid;
    grid-template-columns: auto minmax(5rem, 1fr) 2.5rem;
    align-items: end;
    gap: 0.6rem;
}

.color-row label:first-child {
    display: grid;
    gap: 0.3rem;
}

.color-row .alpha {
    display: grid;
    gap: 0.45rem;
}

.check-row {
    display: flex;
    margin: 0.9rem 0;
    padding: 0.8rem;
    align-items: center;
    gap: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    color: var(--muted);
    font-size: 0.75rem;
}

.form-actions,
.export-grid,
.preset-save {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
}

.primary-button {
    border-color: transparent;
    color: #190b13;
    background: linear-gradient(135deg, var(--accent), #ff8a68);
}

.primary-button:hover {
    border-color: transparent;
    background: linear-gradient(135deg, #ff6a82, #ff9c7d);
}

.danger-button {
    color: var(--danger);
}

.workspace {
    display: grid;
    min-width: 0;
    min-height: calc(100vh - 5rem);
    padding: clamp(0.8rem, 2vw, 1.5rem);
    grid-template-rows: auto minmax(20rem, 1fr) auto;
    gap: 0.8rem;
}

.workspace-toolbar {
    padding: 0.1rem 0.2rem;
}

.view-actions {
    gap: 0.4rem;
}

.view-actions button {
    min-width: 2.6rem;
}

.view-actions output {
    min-width: 3.5rem;
    text-align: center;
}

.canvas-stage {
    position: relative;
    display: grid;
    min-width: 0;
    min-height: 20rem;
    place-items: center;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    background:
        linear-gradient(45deg, rgba(255, 255, 255, 0.025) 25%, transparent 25%) 0 0 / 1.2rem 1.2rem,
        linear-gradient(-45deg, rgba(255, 255, 255, 0.025) 25%, transparent 25%) 0 0 / 1.2rem 1.2rem,
        #0c0e1b;
    box-shadow: var(--shadow);
    cursor: grab;
    touch-action: none;
}

.canvas-stage.is-dragging {
    cursor: grabbing;
}

#myCanvas {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
}

.stage-hint {
    position: absolute;
    z-index: 2;
    right: 0.7rem;
    bottom: 0.7rem;
    padding: 0.42rem 0.62rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    background: rgba(9, 11, 23, 0.74);
    pointer-events: none;
    font-size: 0.63rem;
}

.workspace-footer {
    color: var(--muted);
    font-size: 0.7rem;
}

#statusMessage {
    text-align: right;
}

.drawer-backdrop {
    position: fixed;
    z-index: 35;
    inset: 0;
    background: rgba(5, 6, 14, 0.58);
    backdrop-filter: blur(0.15rem);
}

.mobile-only {
    display: none;
}

@media (max-width: 64rem) {
    .app-shell {
        grid-template-columns: minmax(17rem, 20rem) minmax(0, 1fr);
    }

    .stage-hint {
        display: none;
    }
}

@media (max-width: 48rem) {
    .mobile-only {
        display: inline-grid;
        place-items: center;
    }

    .app-shell {
        display: block;
    }

    .controls {
        position: fixed;
        z-index: 40;
        top: 0;
        bottom: 0;
        left: 0;
        width: min(90vw, 23rem);
        max-height: none;
        border-right: 1px solid var(--border);
        box-shadow: var(--shadow);
        transform: translateX(-105%);
        transition: transform 220ms ease;
    }

    .controls.is-open {
        transform: translateX(0);
    }

    .workspace {
        min-height: calc(100vh - 5rem);
    }

    .workspace-toolbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .view-actions {
        width: 100%;
    }

    .view-actions #resetView {
        margin-left: auto;
    }
}

@media (max-width: 32rem) {
    .topbar {
        min-height: 4.5rem;
    }

    .brand-mark {
        width: 2.25rem;
    }

    #fullscreenButton {
        display: none;
    }

    .workspace {
        min-height: calc(100vh - 4.5rem);
        padding: 0.65rem;
    }

    .workspace-footer {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.3rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}