/*
 * Settings panel
 *
 * Styles for the reader settings dialog (opened via the cog button in the
 * header) and the cog toggle button itself. The dialog uses the native
 * <dialog> element for built-in backdrop, focus trapping, and Escape-to-close.
 */

/* Cog button in header — matches theme-toggle sizing */
.settings-toggle {
    background: transparent;
    border: none;
    padding: 0;
    margin: 0;
    cursor: pointer;
    color: var(--color-ink-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 0;
}

.settings-toggle:hover {
    color: var(--color-primary);
}

.settings-toggle:focus-visible {
    outline: 1px solid var(--color-primary);
    outline-offset: 3px;
}

.settings-toggle svg {
    width: 1.1rem;
    height: 1.1rem;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Dialog — centred on screen via margin: auto (native <dialog> positioning) */
.settings-dialog {
    margin: auto;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    width: min(380px, calc(100vw - 2rem));
    max-height: calc(100vh - 4rem);
    padding: 0;
    overflow-y: auto;
}

.settings-dialog::backdrop {
    background: rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .settings-dialog::backdrop {
    background: rgba(0, 0, 0, 0.55);
}

/* Dialog header */
.settings-dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.settings-dialog-title {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-ink);
    margin: 0;
}

.settings-dialog-close {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-ink-muted);
    font-size: 1.3rem;
    line-height: 1;
    padding: 0;
}

.settings-dialog-close:hover {
    color: var(--color-primary);
}

/* Dialog body */
.settings-dialog-body {
    padding: var(--space-md);
}

/* Setting groups */
.settings-group {
    margin-bottom: var(--space-md);
}

.settings-group:last-child {
    margin-bottom: 0;
}

.settings-group-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--space-xs);
}

.settings-mode-label {
    font-weight: 400;
    color: var(--color-ink-muted);
}

/* Toggle row — label on the left, checkbox on the right */
.settings-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    cursor: pointer;
}

.settings-toggle-row .settings-group-label {
    margin-bottom: 0;
}

.settings-checkbox {
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary);
    cursor: pointer;
}

/* Range sliders — no output/numeric display */
.settings-group input[type="range"] {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    outline: none;
}

.settings-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
}

.settings-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
}

.settings-group input[type="range"]:focus-visible::-webkit-slider-thumb {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.settings-group input[type="range"]:focus-visible::-moz-range-thumb {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Colour pickers — row of labelled swatches */
.settings-colour-row {
    display: flex;
    gap: var(--space-md);
}

.settings-colour-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    cursor: pointer;
}

.settings-colour-name {
    font-size: 0.75rem;
    color: var(--color-ink-muted);
}

.settings-colour-item input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    width: 2.8rem;
    height: 2rem;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    padding: 2px;
    cursor: pointer;
    background: transparent;
}

.settings-colour-item input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.settings-colour-item input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 1px;
}

/* Dialog footer */
.settings-dialog-footer {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border);
}

#settings-reset {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    color: var(--color-ink-muted);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    padding: 0.35rem 0.7rem;
    cursor: pointer;
}

#settings-reset:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Responsive */
@media (max-width: 720px) {
    .settings-dialog {
        width: calc(100vw - 2rem);
    }
}