* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a472a 0%, #2d5a3d 50%, #1a472a 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.game-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

.game-header h1 {
    color: #ffd700;
    font-size: 1.8rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.controls button {
    padding: 10px 20px;
    font-size: 1rem;
    background: linear-gradient(180deg, #ffd700 0%, #ffaa00 100%);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    color: #1a472a;
    transition: transform 0.1s, box-shadow 0.1s;
}

.controls button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.controls button:active {
    transform: translateY(0);
}

.hint-toggle {
    background: linear-gradient(180deg, #6b7280 0%, #4b5563 100%);
    color: #fff;
}

.hint-toggle.active {
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
}

.moves-counter {
    color: #fff;
    font-size: 1.1rem;
}

.game-board {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.top-row {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.stock-waste {
    display: flex;
    gap: 15px;
}

.spacer {
    flex: 1;
}

.foundations {
    display: flex;
    gap: 15px;
}

.pile {
    width: 90px;
    height: 126px;
    border-radius: 8px;
    position: relative;
}

.stock, .foundation {
    background: rgba(0, 0, 0, 0.2);
    border: 3px dashed rgba(255, 255, 255, 0.3);
}

.stock {
    cursor: pointer;
}

.stock:hover {
    border-color: rgba(255, 255, 255, 0.5);
}

.stock.empty {
    cursor: pointer;
}

.stock.empty::after {
    content: '\21BB';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.5);
}

.waste {
    background: transparent;
    border: none;
}

.foundation::before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    opacity: 0.3;
}

.foundation[data-suit="hearts"]::before { content: '\2665'; color: #e74c3c; }
.foundation[data-suit="diamonds"]::before { content: '\2666'; color: #e74c3c; }
.foundation[data-suit="clubs"]::before { content: '\2663'; color: #4a5568; }
.foundation[data-suit="spades"]::before { content: '\2660'; color: #4a5568; }

.tableau {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.tableau-pile {
    background: rgba(0, 0, 0, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.15);
    min-height: 126px;
    height: auto;
}

/* Card styling */
.card {
    width: 90px;
    height: 126px;
    border-radius: 8px;
    position: absolute;
    cursor: pointer;
    transition: transform 0.1s ease;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.card img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    pointer-events: none;
}

.card.face-down {
    cursor: default;
}

.card.face-up:hover {
    transform: translateY(-5px);
    z-index: 1000 !important;
}

.card.dragging {
    opacity: 0.8;
    z-index: 10000 !important;
    cursor: grabbing;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.card.drag-child {
    z-index: 10000 !important;
}

/* Tableau card stacking */
.tableau-pile .card {
    position: absolute;
    left: 0;
}

/* Highlight valid drop targets */
.pile.highlight {
    box-shadow: 0 0 20px 5px rgba(255, 215, 0, 0.6);
    border-color: #ffd700 !important;
}

.card.highlight {
    box-shadow: 0 0 15px 3px rgba(255, 215, 0, 0.8);
}

/* Modal styling */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: linear-gradient(135deg, #2d5a3d 0%, #1a472a 100%);
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 3px solid #ffd700;
}

.modal-content h2 {
    color: #ffd700;
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.modal-content p {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 25px;
}

.modal-content button {
    padding: 15px 30px;
    font-size: 1.2rem;
    background: linear-gradient(180deg, #ffd700 0%, #ffaa00 100%);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    color: #1a472a;
    transition: transform 0.1s;
}

.modal-content button:hover {
    transform: scale(1.05);
}

/* Responsive design */
@media (max-width: 900px) {
    .pile {
        width: 70px;
        height: 98px;
    }

    .card {
        width: 70px;
        height: 98px;
    }

    .game-header h1 {
        font-size: 1.3rem;
    }

    .top-row {
        flex-wrap: wrap;
        justify-content: center;
    }

    .spacer {
        display: none;
    }

    .foundations {
        margin-top: 15px;
    }
}

@media (max-width: 600px) {
    .pile {
        width: 45px;
        height: 63px;
    }

    .card {
        width: 45px;
        height: 63px;
    }

    .tableau {
        gap: 5px;
    }

    .stock-waste, .foundations {
        gap: 5px;
    }
}