/* Brand palette from the site theme, because an iframe does not inherit its variables */
:root {
    --tb-accent-low: #e8f0f9;
    --tb-accent: #146dd6;
    --tb-accent-high: #0f54a5;
    --tb-accent-text: #ffffff;
    --tb-warn-background: #fdf0d5;
    --tb-warn-text: #4a3609;
    --tb-error: #b3261e;
    --tb-error-background: #fdecea;

    --pico-font-size: 95%;
}

/* Pico declares its palette on :root:not([data-theme=dark]), which outranks a plain :root */
:root:root {
    --pico-primary: var(--tb-accent);
    --pico-primary-background: var(--tb-accent);
    --pico-primary-hover-background: var(--tb-accent-high);
    --pico-primary-border: var(--tb-accent);
    --pico-primary-inverse: var(--tb-accent-text);
    --pico-primary-focus: var(--tb-accent-low);
}

[data-theme="dark"] {
    --tb-accent-low: #0f172a;
    --tb-accent: #3392ff;
    --tb-accent-high: #b3d6ff;
    --tb-accent-text: #0f172a;
    --tb-warn-background: #3d2f0d;
    --tb-warn-text: #f7e6c0;
    --tb-error: #f2b8b5;
    --tb-error-background: #3b1513;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --tb-accent-low: #0f172a;
        --tb-accent: #3392ff;
        --tb-accent-high: #b3d6ff;
        --tb-accent-text: #0f172a;
        --tb-warn-background: #3d2f0d;
        --tb-warn-text: #f7e6c0;
        --tb-error: #f2b8b5;
        --tb-error-background: #3b1513;
    }
}

#page-header {
    padding-block: 1.5rem 0.5rem;
}

.titlebar {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5em;
}

.titlebar h1 {
    margin: 0;
    font-size: 1.6rem;
}

.panes {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    align-items: start;
}

@media (min-width: 900px) {
    .panes {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.panes section {
    min-width: 0;
    margin: 0;
}

.panes label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

/* A highlighted pre sits under a transparent textarea, so both have to line up exactly */
.editor {
    position: relative;
    height: 30rem;
    border: 1px solid var(--pico-form-element-border-color);
    border-radius: var(--pico-border-radius);
    background: var(--pico-form-element-background-color);
    overflow: hidden;
}

.editor pre,
.editor textarea {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    margin: 0;
    padding: 0.7rem;
    border: 0;
    border-radius: 0;
    background: none;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.8rem;
    line-height: 1.45;
    letter-spacing: normal;
    tab-size: 4;
    white-space: pre;
    overflow: auto;
}

.editor pre {
    pointer-events: none;
}

.editor pre code {
    display: block;
    font: inherit;
    padding: 0;
    background: none;
    white-space: pre;
    text-shadow: none;
}

.editor textarea {
    color: transparent;
    caret-color: var(--pico-color);
    resize: none;
    box-shadow: none;
}

.editor textarea:focus {
    box-shadow: none;
}

/* Tabs replace the stacked layout on a narrow screen */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

/* Pico redefines --pico-color inside a button, so the inactive tab states its own colour */
.tabs button {
    width: auto;
    margin: 0;
    padding: 0.25rem 0.9rem;
    font-size: 0.85rem;
    background: none;
    border-color: var(--tb-accent);
    color: var(--tb-accent);
}

.tabs button.active {
    background: var(--tb-accent);
    border-color: var(--tb-accent);
    color: var(--tb-accent-text);
}

@media (min-width: 900px) {
    .tabs {
        display: none;
    }
}

@media (max-width: 899.98px) {
    .panes section.inactive {
        display: none;
    }
}

.badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.1rem 0.5rem;
    border-radius: 1rem;
}

.badge {
    background: var(--tb-accent-low);
    color: var(--tb-accent-high);
}

.badge.warn {
    background: var(--tb-warn-background);
    color: var(--tb-warn-text);
}

.editor.invalid {
    border-color: var(--tb-error);
    box-shadow: 0 0 0 2px var(--tb-error-background);
}

.messages {
    margin: 0.5rem 0 0;
    font-size: 0.8rem;
    color: var(--tb-error);
}

/* Embedded mode */

html.embed {
    overflow-y: auto;
}

html.embed #page-header {
    display: none;
}

html.embed .container {
    max-width: none;
    padding: 0;
    margin: 0;
}

html.embed .editor {
    height: 24rem;
}

#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.6rem 1.25rem;
    background: var(--tb-error-background);
    color: var(--tb-error);
    z-index: 1000;
}

.loading-screen {
    display: flex;
    justify-content: center;
    padding-block: 3rem;
}

.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    margin-right: 0.5rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: -2px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}