/* Solitaire (Klondike-lite) styles */

.sol-wrap {
    display: grid;
    gap: 1rem;
    --sol-card-w: clamp(64px, 10vw, 86px);
    --sol-card-max: 96px;
}

.sol-top {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
}

@media (min-width: 920px) {
    .sol-top {
        grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
    }
}

.sol-piles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    min-width: 0;
}

.sol-pile-row {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.sol-pile {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    align-items: center;
}

.sol-pile-label,
.sol-area-label {
    color: var(--grey-color);
    font-weight: 700;
    font-size: 0.92rem;
    line-height: 1.2;
    user-select: none;
    white-space: nowrap;
}

.sol-pile-label {
    font-size: 0.82rem;
}

.sol-area-label {
    margin-top: 0.15rem;
}

.sol-area-label-right {
    width: 100%;
    text-align: right;
}

.sol-foundations {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.35rem;
    min-width: 0;
}

.sol-slot {
    width: var(--sol-card-w);
    height: auto;
    aspect-ratio: 86 / 120;
    border-radius: 14px;
    border: 2px dashed rgba(108, 92, 231, 0.22);
    background: rgba(108, 92, 231, 0.04);
    position: relative;
}

body.dark-theme .sol-slot {
    border-color: rgba(162, 155, 254, 0.20);
    background: rgba(162, 155, 254, 0.06);
}

.sol-card {
    width: var(--sol-card-w);
    height: auto;
    aspect-ratio: 86 / 120;
    border-radius: 14px;
    border: 1px solid rgba(0, 0, 0, 0.10);
    background: var(--light-card-bg);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.08);
    position: absolute;
    left: 0;
    top: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
    padding: clamp(0.34rem, 0.9vw, 0.45rem) clamp(0.40rem, 1.0vw, 0.55rem);
    user-select: none;
    cursor: pointer;
    touch-action: none;
    -webkit-user-drag: none;
}

.sol-drag-layer {
    position: fixed;
    left: 0;
    top: 0;
    width: 0;
    height: 0;
    z-index: 9999;
    pointer-events: none;
}

.sol-card.dragging {
    cursor: grabbing;
    box-shadow: 0 18px 34px rgba(0, 0, 0, 0.18);
}

.sol-slot.drop-valid {
    border-color: rgba(0, 206, 201, 0.45);
    background: rgba(0, 206, 201, 0.06);
}

.sol-slot.drop-target {
    border-color: rgba(0, 206, 201, 0.70);
    background: rgba(0, 206, 201, 0.10);
}

.sol-card.drop-target {
    outline: 3px solid rgba(0, 206, 201, 0.22);
    outline-offset: 3px;
}

body.dark-theme .sol-card {
    background: var(--dark-card-bg);
    border-color: rgba(255, 255, 255, 0.10);
    box-shadow: 0 10px 18px rgba(0, 0, 0, 0.25);
}

.sol-card.face-down {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: rgba(255, 255, 255, 0.18);
}

.sol-card.face-down .sol-rank,
.sol-card.face-down .sol-suit,
.sol-card.face-down .sol-corner {
    visibility: hidden;
}

.sol-card.selected {
    outline: 3px solid rgba(108, 92, 231, 0.28);
    outline-offset: 3px;
    transform: translateY(-2px);
}

.sol-col .sol-card.selected {
    transform: translateX(-50%) translateY(-2px);
}

.sol-card.hint {
    outline: 3px solid rgba(0, 206, 201, 0.28);
    outline-offset: 3px;
}

.sol-slot.hint-target {
    border-color: rgba(0, 206, 201, 0.55);
    background: rgba(0, 206, 201, 0.08);
}

.sol-card.moved {
    animation: solGlow 260ms ease-out;
}

@keyframes solGlow {
    0% { box-shadow: 0 12px 22px rgba(0, 206, 201, 0.22); }
    100% { box-shadow: 0 8px 18px rgba(0, 0, 0, 0.08); }
}

.sol-card .sol-corner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 800;
    font-size: clamp(0.72rem, 1.6vw, 0.95rem);
}

.sol-card .sol-center {
    display: grid;
    place-items: center;
    font-size: clamp(1.35rem, 4.2vw, 2rem);
    font-weight: 900;
}

.sol-red {
    color: #d63031;
}

.sol-black {
    color: #2d3436;
}

body.dark-theme .sol-black {
    color: var(--dark-text);
}

.sol-tableau {
    display: grid;
    /* Always show all 7 columns (no horizontal scrolling) */
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: clamp(0.35rem, 1vw, 0.75rem);
    align-items: start;
    overflow-x: visible;
    padding-bottom: 0.5rem;
}

.sol-col {
    position: relative;
    min-height: 420px;
}

.sol-col .sol-slot {
    width: 100%;
    height: auto;
    aspect-ratio: 86 / 120;
    margin: 0 auto;
    max-width: var(--sol-card-max);
}

.sol-col .sol-card {
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: var(--sol-card-max);
    height: auto;
    aspect-ratio: 86 / 120;
}

.sol-msg {
    color: var(--grey-color);
    font-weight: 600;
    margin-top: 0.25rem;
}

/* Tutorial overlay */
.sol-tutorial {
    position: fixed;
    inset: 0;
    z-index: 12000;
}

.sol-demo {
    position: fixed;
    inset: 0;
    z-index: 12500;
}

.sol-demo-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    pointer-events: auto;
}

.sol-demo-panel {
    position: absolute;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%);
    width: min(520px, calc(100vw - 2rem));
    background: rgba(0, 0, 0, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 0.9rem 1rem 0.85rem;
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.25);
}

.sol-demo-caption {
    color: rgba(255, 255, 255, 0.92);
    font-weight: 650;
    line-height: 1.6;
}

.sol-demo-actions {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    margin-top: 0.75rem;
}

.sol-demo-spacer {
    flex: 1;
}

.sol-tutorial-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
}

.sol-tutorial-popover {
    position: absolute;
    width: min(360px, calc(100vw - 2rem));
    background: var(--light-card-bg);
    border-radius: 16px;
    padding: 1rem 1rem 0.9rem;
    border: 1px solid rgba(0, 0, 0, 0.12);
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.22);
}

body.dark-theme .sol-tutorial-popover {
    background: var(--dark-card-bg);
    border-color: rgba(255, 255, 255, 0.12);
}

.sol-tutorial-popover[data-pos="bottom"]::before,
.sol-tutorial-popover[data-pos="top"]::before {
    content: '';
    position: absolute;
    left: var(--arrow-left, 50%);
    width: 14px;
    height: 14px;
    background: inherit;
    border-left: 1px solid rgba(0, 0, 0, 0.12);
    border-top: 1px solid rgba(0, 0, 0, 0.12);
    transform: translateX(-50%) rotate(45deg);
}

body.dark-theme .sol-tutorial-popover[data-pos="bottom"]::before,
body.dark-theme .sol-tutorial-popover[data-pos="top"]::before {
    border-left-color: rgba(255, 255, 255, 0.12);
    border-top-color: rgba(255, 255, 255, 0.12);
}

.sol-tutorial-popover[data-pos="bottom"]::before {
    top: -7px;
}

.sol-tutorial-popover[data-pos="top"]::before {
    bottom: -7px;
    transform: translateX(-50%) rotate(225deg);
}

.sol-tutorial-step {
    font-weight: 650;
    color: var(--light-text);
    line-height: 1.6;
}

body.dark-theme .sol-tutorial-step {
    color: var(--dark-text);
}

.sol-tutorial-mode {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-top: 0.85rem;
    flex-wrap: wrap;
}

.sol-tutorial-mode .btn {
    flex: 1;
    min-width: 160px;
}

.sol-tutorial-sub {
    margin-top: 0.7rem;
    color: var(--grey-color);
    font-weight: 600;
    line-height: 1.5;
    font-size: 0.95rem;
}

.sol-tutorial-checkbox {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-top: 0.85rem;
    color: var(--grey-color);
    font-weight: 600;
    user-select: none;
}

.sol-tutorial-actions {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    margin-top: 0.85rem;
}

.sol-tutorial-spacer {
    flex: 1;
}

.sol-tut-highlight {
    position: relative;
    z-index: 12001;
    outline: 3px solid rgba(0, 206, 201, 0.55);
    outline-offset: 4px;
    border-radius: 16px;
}

.sol-demo-highlight {
    position: relative;
    z-index: 12501;
    outline: 3px solid rgba(0, 206, 201, 0.55);
    outline-offset: 4px;
    border-radius: 16px;
    pointer-events: none;
}

/* two-col 双栏在 900px 才启用，700-900 间面板同样窄，故单列堆叠断点与之对齐 */
@media (max-width: 900px) {
    .sol-top,
    .sol-piles {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    .sol-wrap {
        --sol-card-w: clamp(58px, 19vw, 70px);
        min-width: 0;
    }

    .sol-top,
    .sol-piles {
        grid-template-columns: 1fr;
        min-width: 0;
    }

    .sol-pile-row {
        flex-wrap: nowrap;
    }

    .sol-foundations {
        align-items: flex-start;
        min-width: 0;
    }

    .sol-area-label-right {
        text-align: left;
    }

    .sol-foundations .sol-pile-row {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        justify-content: flex-start !important;
        overflow-x: auto;
        padding: 0.2rem 0.15rem 0.4rem;
    }

    .sol-msg {
        line-height: 1.55;
    }

    .sol-tableau {
        grid-template-columns: repeat(7, minmax(58px, 70px));
        overflow-x: auto;
        overscroll-behavior-inline: contain;
        padding: 0.25rem 0.1rem 0.75rem;
    }

    .sol-col {
        min-height: 360px;
    }
}