/* Glitch tool (/glitch/) */
.glitch-app {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 1.5rem;
    align-items: start;
}

.glitch-stage {
    position: sticky;
    top: 1rem;
    min-width: 0;
}

.glitch-drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 420px;
    padding: 2rem;
    box-sizing: border-box;
    border: 1px dashed var(--meta-color);
    background: var(--light-gray);
    color: var(--text-color);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.glitch-drop:hover,
.glitch-app.is-dragover .glitch-drop {
    border-color: var(--heading-color);
}

.glitch-app.is-dragover #glitch-canvas {
    outline: 2px dashed var(--heading-color);
    outline-offset: 4px;
}

.glitch-drop-title {
    font-size: 1.25rem;
    color: var(--heading-color);
}

.glitch-drop-hint {
    font-size: 0.85rem;
    color: var(--meta-color);
    line-height: 1.5;
}

#glitch-canvas {
    display: block;
    max-width: 100%;
    max-height: calc(100vh - 4rem);
    margin: 0 auto;
    background: var(--light-gray);
}

#glitch-canvas[hidden],
.glitch-drop[hidden] {
    display: none;
}

.glitch-status {
    min-height: 1.4em;
    margin: 0.5rem 0 0;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--meta-color);
    text-align: center;
}

.glitch-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
    font-size: 0.875rem;
    line-height: 1.4;
}

.glitch-toolbar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.glitch-btn {
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0;
    background: var(--card-background);
    color: var(--heading-color);
    font: inherit;
    cursor: pointer;
    transition: border-color 0.15s ease, opacity 0.15s ease;
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

.glitch-btn:hover:not(:disabled) {
    border-color: var(--heading-color);
}

.glitch-btn:disabled {
    opacity: 0.4;
    cursor: default;
}

.glitch-btn--primary {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--accent-contrast);
}

.glitch-field {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    margin: 0;
}

.glitch-field--inline {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.glitch-field-head {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    color: var(--text-color);
}

.glitch-field-value {
    color: var(--meta-color);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.glitch-panel select {
    max-width: 100%;
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0;
    background: var(--card-background);
    color: var(--heading-color);
    font: inherit;
}

.glitch-panel input[type="range"] {
    width: 100%;
    margin: 0;
    accent-color: var(--heading-color);
}

.glitch-chain {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.glitch-chain:empty::before {
    content: "No steps yet — add one below.";
    color: var(--meta-color);
}

.glitch-card {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    background: var(--card-background);
}

.glitch-card.is-off .glitch-card-body {
    opacity: 0.4;
}

.glitch-card-head {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.glitch-card-title {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin: 0;
    font-weight: 600;
    color: var(--heading-color);
    cursor: pointer;
}

.glitch-card-title input {
    margin: 0;
    accent-color: var(--heading-color);
}

.glitch-icon-btn {
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    border: 1px solid transparent;
    background: none;
    color: var(--meta-color);
    font: inherit;
    line-height: 1;
    cursor: pointer;
}

.glitch-icon-btn:hover:not(:disabled) {
    color: var(--heading-color);
    border-color: var(--border-color);
}

.glitch-icon-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

.glitch-card-body {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.glitch-card-error {
    margin: 0;
    color: #c0392b;
    font-size: 0.8rem;
}

.glitch-add {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.glitch-add-label {
    color: var(--meta-color);
}

.glitch-add-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.glitch-about {
    max-width: 760px;
    margin: 3rem 0 2rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.glitch-about h2 {
    font-weight: 400;
}

.glitch-about li {
    margin-bottom: 0.5rem;
}

@media (max-width: 900px) {
    .glitch-app {
        grid-template-columns: minmax(0, 1fr);
    }

    .glitch-stage {
        position: static;
    }

    .glitch-drop {
        min-height: 240px;
    }

    #glitch-canvas {
        max-height: 70vh;
    }
}