:root {
    --tstp-bg: #0f1624;
    --tstp-surface: #172033;
    --tstp-text: #e8edf7;
    --tstp-text-muted: #a0acc2;
    --tstp-accent: #3f7cff;
    --tstp-border: #2a3854;
    --tstp-focus-ring: #5f92ff;
    --tstp-shadow: rgba(0, 0, 0, 0.35);

    --bg: var(--tstp-bg);
    --bg-gradient: linear-gradient(140deg, var(--tstp-bg) 0%, #121c2f 45%, #0f1624 100%);
    --panel: var(--tstp-surface);
    --panel-border: var(--tstp-border);
    --ink: var(--tstp-text);
    --muted: var(--tstp-text-muted);
    --accent: var(--tstp-accent);
    --accent-strong: #2f69de;
    --danger: #c23d33;
    --ok: #2b8a57;
}

html[data-theme='tstp_fallback'] {
    --tstp-bg: #0f1624;
    --tstp-surface: #172033;
    --tstp-text: #e8edf7;
    --tstp-text-muted: #a0acc2;
    --tstp-accent: #3f7cff;
    --tstp-border: #2a3854;
    --tstp-focus-ring: #5f92ff;
    --tstp-shadow: rgba(0, 0, 0, 0.35);

    --bg: var(--tstp-bg);
    --bg-gradient: linear-gradient(140deg, var(--tstp-bg) 0%, #121c2f 45%, #0f1624 100%);
    --panel: var(--tstp-surface);
    --panel-border: var(--tstp-border);
    --ink: var(--tstp-text);
    --muted: var(--tstp-text-muted);
    --accent: var(--tstp-accent);
    --accent-strong: #2f69de;
}

.tstp-theme-settings-fab {
    display: none;
}

.tstp-theme-slidein {
    position: fixed;
    inset: 0;
    z-index: 2200;
    pointer-events: none;
}

.tstp-theme-slidein-tab,
.tstp-theme-slidein-panel {
    pointer-events: auto;
}

.tstp-theme-slidein-tab {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    border: 1px solid var(--tstp-border);
    border-right: none;
    border-radius: 12px 0 0 12px;
    background: var(--tstp-surface);
    color: var(--tstp-text);
    padding: 10px 9px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.03em;
    box-shadow: 0 10px 24px var(--tstp-shadow);
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.tstp-theme-slidein-tab:hover,
.tstp-theme-slidein.tstp-force-hover .tstp-theme-slidein-tab {
    filter: brightness(1.08);
}

.tstp-theme-slidein-panel {
    position: fixed;
    top: 50%;
    right: 0;
    width: min(460px, calc(100vw - 58px));
    max-height: 76vh;
    overflow: auto;
    border: 1px solid var(--tstp-border);
    border-radius: 14px;
    background: var(--tstp-surface);
    color: var(--tstp-text);
    box-shadow: 0 22px 50px var(--tstp-shadow);
    transform: translate(100%, -50%);
    opacity: 0;
    transition: transform 180ms ease-out, opacity 160ms ease-out;
}

.tstp-theme-slidein-panel.open {
    transform: translate(0, -50%);
    opacity: 1;
}

.tstp-theme-slidein.tstp-force-hover .tstp-theme-slidein-panel {
    filter: brightness(1.03);
}

.tstp-theme-modal-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--tstp-border);
}

.tstp-theme-modal-head h2 {
    margin: 0;
    font-size: 18px;
}

.tstp-theme-modal-body {
    padding: 14px 16px;
    display: grid;
    gap: 12px;
}

.tstp-theme-modal-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.tstp-theme-modal label {
    display: grid;
    gap: 6px;
    font-size: 12px;
    color: var(--tstp-text-muted);
}

.tstp-theme-modal input,
.tstp-theme-modal select,
.tstp-theme-modal button {
    font: inherit;
}

.tstp-theme-modal input {
    width: 100%;
    border: 1px solid var(--tstp-border);
    border-radius: 8px;
    padding: 8px 10px;
    background: var(--tstp-bg);
    color: var(--tstp-text);
}

.tstp-theme-modal select {
    width: 100%;
    border: 1px solid var(--tstp-border);
    border-radius: 8px;
    padding: 8px 10px;
    background: var(--tstp-bg);
    color: var(--tstp-text);
}

.tstp-theme-modal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tstp-theme-modal button {
    border: 1px solid var(--tstp-border);
    border-radius: 8px;
    background: var(--tstp-bg);
    color: var(--tstp-text);
    padding: 8px 12px;
    cursor: pointer;
}

.tstp-theme-modal button.primary {
    border-color: var(--tstp-accent);
    background: var(--tstp-accent);
    color: #ffffff;
}

.tstp-theme-test-result {
    margin: 0;
    border: 1px solid var(--tstp-border);
    border-radius: 8px;
    background: var(--tstp-bg);
    color: var(--tstp-text-muted);
    min-height: 68px;
    max-height: 220px;
    overflow: auto;
    padding: 8px;
    font-size: 12px;
    white-space: pre-wrap;
}

.tstp-theme-note {
    margin: 0;
    color: var(--tstp-text-muted);
    font-size: 12px;
}

@media (max-width: 640px) {
    .tstp-theme-slidein-tab {
        top: auto;
        bottom: 0;
        right: 8px;
        transform: none;
        writing-mode: horizontal-tb;
        border-right: 1px solid var(--tstp-border);
        border-radius: 12px;
        padding: 9px 12px;
    }

    .tstp-theme-slidein-panel {
        top: auto;
        bottom: 0;
        right: 8px;
        width: min(420px, calc(100vw - 16px));
        max-height: 70vh;
        transform: translate(100%, 0);
    }

    .tstp-theme-slidein-panel.open {
        transform: translate(0, 0);
    }
}