/**
 * Penguin chess viewer – single stylesheet (theme via class overrides).
 * Default palette inspired by devonchess.org game viewer (green/cream).
 */

.penguin-viewer {
    --penguin-light: #f0f5e8;
    --penguin-dark: #6b8e4e;
    --penguin-border: #4a6741;
    --penguin-text: #1a1a1a;
    --penguin-accent: #2c5282;
    --penguin-panel-bg: #fafaf8;
    --penguin-board-width: 75%;
    --penguin-annotation-height: 400px;
    margin: 1.5rem 0;
    font-family: inherit;
    color: var(--penguin-text);
    max-width: 100%;
}

.penguin-details-wrap {
    margin-bottom: 0.75rem;
}

.penguin-details-toggle {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid var(--penguin-border);
    border-radius: 4px;
    background: var(--penguin-panel-bg);
    color: var(--penguin-text);
}

.penguin-details-toggle:hover,
.penguin-details-toggle:focus {
    background: var(--penguin-light);
    outline: 2px solid var(--penguin-accent);
    outline-offset: 2px;
}

.penguin-details {
    margin-top: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--penguin-panel-bg);
    border: 1px solid var(--penguin-border);
    border-radius: 4px;
}

.penguin-details.penguin-details-hidden {
    display: none;
}

.penguin-details-list {
    display: grid;
    grid-template-columns: minmax(auto, max-content) minmax(0, 1fr);
    gap: 0.25rem 1rem;
    margin: 0;
}

.penguin-details-list dt {
    font-weight: 600;
    margin: 0;
    min-width: 0;
    overflow-wrap: break-word;
    word-break: break-word;
}

.penguin-details-list dd {
    margin: 0;
    min-width: 0;
    overflow-wrap: break-word;
    word-break: break-word;
}

.penguin-board-wrap {
    display: flex;
    justify-content: center;
    margin: 0.75rem 0;
    width: 100%;
}

.penguin-board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(8, 1fr);
    width: var(--penguin-board-width, 75%);
    max-width: 100%;
    aspect-ratio: 1 / 1;
    min-width: 200px;
    min-height: 200px;
    border: 3px solid var(--penguin-border);
    border-radius: 2px;
    box-sizing: border-box;
    user-select: none;
}

@supports not (aspect-ratio: 1 / 1) {
    .penguin-board-wrap {
        position: relative;
        width: var(--penguin-board-width, 75%);
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .penguin-board-wrap::before {
        content: '';
        display: block;
        padding-top: 100%;
    }

    .penguin-board {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        min-width: 0;
        min-height: 0;
    }
}

.penguin-square {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
}

.penguin-square-light {
    background-color: var(--penguin-light);
}

.penguin-square-dark {
    background-color: var(--penguin-dark);
}

.penguin-piece {
    display: block;
    width: 85%;
    height: 85%;
    flex-shrink: 0;
    pointer-events: none;
}

.penguin-piece-svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* Theme: blue board (override on .penguin-viewer.penguin-theme-blue) */
.penguin-viewer.penguin-theme-blue {
    --penguin-light: #dee3e6;
    --penguin-dark: #8ca2ad;
    --penguin-border: #5a6d78;
}

/* Theme: brown wood */
.penguin-viewer.penguin-theme-brown {
    --penguin-light: #f0d9b5;
    --penguin-dark: #b58863;
    --penguin-border: #8b6914;
}

.penguin-eval-wrap {
    display: flex;
    justify-content: center;
    width: 100%;
    margin: 0.5rem 0;
}

/* Sliding evaluation bar: white (left) vs black (right). Width matches the
   board; height is half the control buttons' min-height (2.75rem). */
.penguin-eval-bar {
    position: relative;
    width: var(--penguin-board-width, 75%);
    max-width: 100%;
    height: 1.375rem;
    border: 1px solid var(--penguin-border);
    border-radius: 3px;
    background: #1a1a1a;
    overflow: hidden;
    box-sizing: border-box;
}

.penguin-eval-white {
    height: 100%;
    width: 50%;
    background: #f5f5f5;
    border-right: 1px solid var(--penguin-border);
    box-sizing: border-box;
    transition: width 0.3s ease;
}

/* Evaluation value, centred over the bar. Two layers are stacked so the
   number stays readable on any background: the light layer shows over the
   black (right) region, the dark layer is clipped to the white (left)
   region and painted on top of it. */
.penguin-eval-score {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    margin: 0;
    font-size: 0.8rem;
    font-weight: 700;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    pointer-events: none;
    user-select: none;
}

.penguin-eval-score-light {
    color: #f5f5f5;
}

.penguin-eval-score-dark {
    color: #1a1a1a;
    -webkit-clip-path: inset(0 50% 0 0);
    clip-path: inset(0 50% 0 0);
}

.penguin-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem;
    margin: 0.5rem 0 0.75rem;
}

.penguin-btn {
    min-width: 2.75rem;
    min-height: 2.75rem;
    padding: 0.35rem 0.65rem;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--penguin-border);
    border-radius: 4px;
    background: var(--penguin-panel-bg);
    color: var(--penguin-text);
}

.penguin-btn:hover,
.penguin-btn:focus {
    background: var(--penguin-light);
    outline: 2px solid var(--penguin-accent);
    outline-offset: 2px;
}

.penguin-btn-autoplay.is-playing {
    background: var(--penguin-dark);
    color: #fff;
}

.penguin-annotation-wrap {
    height: var(--penguin-annotation-height, 400px);
    overflow: hidden;
    border: 1px solid var(--penguin-border);
    border-radius: 4px;
    background: var(--penguin-panel-bg);
}

.penguin-annotation {
    height: 100%;
    overflow-y: auto;
    padding: 0.75rem 1rem;
    font-size: clamp(0.85rem, 2.5vw, 1rem);
    line-height: 1.55;
}

.penguin-move-num {
    color: #555;
    font-weight: 600;
}

.penguin-move {
    cursor: default;
}

.penguin-move-current {
    font-weight: 700;
}

.penguin-comment {
    color: #333;
    font-style: italic;
}

.penguin-nag {
    color: var(--penguin-accent);
    font-weight: 600;
}

.penguin-variation {
    display: inline;
    margin: 0 0.15em;
    padding: 0.1em 0.35em;
    font: inherit;
    font-size: 0.95em;
    color: var(--penguin-accent);
    background: transparent;
    border: none;
    border-bottom: 1px dashed var(--penguin-accent);
    cursor: pointer;
    text-align: left;
}

.penguin-variation:hover,
.penguin-variation:focus {
    background: rgba(44, 82, 130, 0.1);
    outline: none;
}

.penguin-error {
    color: #b32d2e;
    padding: 0.5rem;
    border-left: 4px solid #b32d2e;
}

@media (max-width: 480px) {
    .penguin-board {
        width: 100%;
    }

    .penguin-eval-bar {
        width: 100%;
        height: 1.25rem;
    }

    .penguin-btn {
        min-width: 2.5rem;
        min-height: 2.5rem;
        font-size: 1rem;
    }

    .penguin-details-list {
        grid-template-columns: minmax(0, 1fr);
        gap: 0 0;
    }

    .penguin-details-list dt {
        margin-top: 0.4rem;
    }

    .penguin-details-list dt:first-child {
        margin-top: 0;
    }

    .penguin-details-list dd {
        margin-bottom: 0.15rem;
    }
}