:root {
    color-scheme: dark;
    font-family: Inter, ui-sans-serif, system-ui, sans-serif;
    background: #14171c;
    color: #f2f5f8;
}

* {
    box-sizing: border-box;
}

html,
body,
#viewer,
#canvas-container {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
}

#viewer {
    position: relative;
    min-height: 380px;
    background:
        radial-gradient(circle at 50% 15%, #303640 0, #14171c 60%);
}

#canvas-container canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

#status,
#error {
    position: absolute;
    inset: 0.75rem auto auto 50%;
    max-width: min(30rem, calc(100% - 2rem));
    padding: 0.55rem 0.8rem;
    border: 1px solid #46505e;
    border-radius: 8px;
    background: rgb(20 23 28 / 88%);
    box-shadow: 0 8px 30px rgb(0 0 0 / 30%);
    transform: translateX(-50%);
    text-align: center;
    pointer-events: none;
}

#error {
    border-color: #b64c5c;
    color: #ffd7dc;
}

#material-panel {
    position: absolute;
    inset: 0.75rem 0.75rem auto auto;
    display: grid;
    width: min(20rem, calc(100% - 1.5rem));
    max-height: calc(100% - 6rem);
    gap: 0.65rem;
    overflow: auto;
    padding: 0.8rem 1rem;
    border: 1px solid rgb(255 255 255 / 14%);
    border-radius: 12px;
    background: rgb(20 23 28 / 90%);
    box-shadow: 0 12px 40px rgb(0 0 0 / 40%);
    backdrop-filter: blur(12px);
}

#material-panel[hidden] {
    display: none;
}

.panel-heading {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
}

#close-material {
    width: 2rem;
    padding: 0;
    font-size: 1.25rem;
}

#material-panel label:not(.checkbox) {
    display: grid;
    grid-template-columns: 7.5rem 1fr;
    gap: 0.55rem;
    align-items: center;
    color: #d0d6df;
    font-size: 0.78rem;
}

#material-panel input[type="range"],
#material-panel input[type="number"] {
    width: 100%;
    min-width: 0;
}

.checkbox {
    display: flex;
    gap: 0.45rem;
    align-items: center;
    font-size: 0.8rem;
}

.toolbar {
    position: absolute;
    inset: auto 0.65rem 0.65rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    align-items: center;
    padding: 0.5rem;
    border: 1px solid rgb(255 255 255 / 12%);
    border-radius: 10px;
    background: rgb(20 23 28 / 88%);
    box-shadow: 0 8px 30px rgb(0 0 0 / 35%);
    backdrop-filter: blur(10px);
}

.toolbar label {
    display: flex;
    gap: 0.35rem;
    align-items: center;
    color: #ccd3dc;
    font-size: 0.72rem;
}

button,
select,
input[type="number"] {
    min-height: 2rem;
    padding: 0.35rem 0.55rem;
    border: 1px solid #46505e;
    border-radius: 6px;
    background: #252b34;
    color: inherit;
    font: inherit;
}

button {
    cursor: pointer;
}

button:hover:not(:disabled) {
    border-color: #67a7d8;
    background: #303a47;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 2px solid #71b9eb;
    outline-offset: 2px;
}

button:disabled,
select:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}