/* Import a modern, clean font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&display=swap');

:root {
    /* UI Dimensions */
    --card-width: max(7vmin, 65px);
    --card-height: calc(var(--card-width) * 1.4);
    --card-radius: clamp(6px, 1.5vmin, 10px);
    --gap: clamp(10px, 2vmin, 18px);

    /* New Color Palette */
    --felt: #1a5632;
    --felt-dark: #113821;
    --line: #ffffff2a;
    --glow: #64ffda;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* UI Element Colors */
    --control-bg: #ffffff11;
    --control-hover-bg: #ffffff22;
    --accent-color: #58cc93;
    --accent-hover-color: #4ab881;
    --text-color: #f0f0f0;
}

* { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
}

body {
    background: radial-gradient(circle at 50% 0%, var(--felt) 0%, var(--felt-dark) 90%);
    color: var(--text-color);
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding: 12px clamp(12px, 3vw, 28px);
    gap: 12px;
    background: rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--line);
}

h1 {
    margin: 0;
    font-size: clamp(18px, 3.2vmin, 28px);
    font-weight: 700;
}

.scores {
    display: flex;
    gap: 16px;
    font-weight: 600;
    margin: 0 auto 0 24px;
}

.score-display span {
    color: var(--accent-color);
    font-weight: 700;
}

.controls {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.btn {
    background: var(--control-bg);
    color: var(--text-color);
    border: 1px solid var(--line);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: transform .12s ease, background-color .15s ease, box-shadow .15s ease;
}

.btn:hover {
    background: var(--control-hover-bg);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.btn:active {
    transform: translateY(1px) scale(.99);
}

.btn-accent {
    background: var(--accent-color);
    border-color: transparent;
    color: #113821;
}

.btn-accent:hover {
    background: var(--accent-hover-color);
    border-color: transparent;
}

.draw-toggle {
    display: flex;
    gap: 6px;
    align-items: center;
    background: var(--control-bg);
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid var(--line);
}

.draw-toggle select {
    appearance: none;
    background: transparent;
    color: var(--text-color);
    border: none;
    outline: none;
    font-weight: 600;
    cursor: pointer;
}

.game-board {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: calc(var(--gap) * 1.5);
    width: min(1100px, 96vw);
    margin: 0 auto;
    padding: 0 clamp(10px, 2vw, 20px) clamp(10px, 2vw, 20px);
    flex: 1;
    min-height: 0;
}

.top-piles, .tableau {
    display: flex;
    gap: var(--gap);
    justify-content: space-between;
}
.tableau { flex: 1; min-height: 0; }
.stock-waste, .foundations { display: flex; gap: var(--gap); }
.foundations { margin-left: auto; }

.pile {
    width: var(--card-width);
    height: var(--card-height);
    border-radius: var(--card-radius);
    position: relative;
    border: 2px dashed var(--line);
    outline: none;
    transition: box-shadow 0.2s ease;
}
.pile:focus-visible { box-shadow: 0 0 0 3px #fff6; }
.tableau-pile { height: 100%; border: none; }
.tableau-pile::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: var(--card-width);
    height: var(--card-height);
    border-radius: var(--card-radius);
    border: 2px dashed var(--line);
}

.card {
    width: var(--card-width);
    height: var(--card-height);
    position: absolute;
    user-select: none;
    touch-action: none;
    transition: top .18s ease, left .18s ease, transform .18s ease, filter .2s ease;
    will-change: top, left, transform;
    filter: drop-shadow(0 2px 5px var(--shadow-color));
}
.card.is-stacked { filter: none; }
.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform .24s ease;
}
.card.is-flipped .card-inner { transform: rotateY(180deg); }
.card-face {
    position: absolute;
    inset: 0;
    border-radius: var(--card-radius);
    backface-visibility: hidden;
}
.card-face--front {
    background: linear-gradient(160deg, #ffffff, #f4f4f4);
    transform: rotateY(180deg);
    padding: 8px;
    cursor: grab;
    border: 1px solid #d0d0d0;
}

.red { color: #D90429; }
.black { color: #2B2D42; }

.card-value-display--top {
    position: absolute;
    top: 8px;
    left: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: .9;
}
.card-value-display--bottom {
    position: absolute;
    bottom: 8px;
    right: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: .9;
    transform: rotate(180deg);
}

.card-rank { font-size: 1.24em; font-weight: 800; }
.card-suit { font-size: .9em; }

.card-watermark {
    position: absolute;
    inset: auto 0 0 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.6em;
    opacity: .10;
    pointer-events: none;
}
.card.dragging {
    opacity: .95;
    transform: rotate(-1.5deg) scale(1.06);
    z-index: 900;
    filter: drop-shadow(0 10px 22px rgba(0, 0, 0, .45));
    outline: 2px solid var(--glow);
    border-radius: var(--card-radius);
}
.pile.drag-over::before, .pile.drag-over {
    box-shadow: 0 0 14px 4px var(--glow);
    border-color: var(--glow);
    border-style: solid;
}
.card.selected {
    outline: 3px solid #ffd54d;
    border-radius: var(--card-radius);
    filter: drop-shadow(0 0 0 var(--shadow-color)) drop-shadow(0 8px 16px rgba(0,0,0,0.45));
}
#win-message.hidden { display: none; }
#win-message {
    position: fixed;
    inset: auto 0 14% 0;
    margin: auto;
    width: fit-content;
    font-size: clamp(28px, 5vmin, 48px);
    font-weight: 900;
    text-shadow: 0 8px 20px rgba(0, 0, 0, .4);
    animation: win-bounce 1.2s ease-in-out infinite;
    padding: 10px 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 14px;
    border: 1px solid var(--line);
    backdrop-filter: blur(8px);
}
@keyframes win-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}
.modal.hidden {
    opacity: 0;
    visibility: hidden;
}
.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
}
.modal-content {
    position: relative;
    background: var(--felt-dark);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    animation: modal-enter 0.3s ease forwards;
}
.modal.hidden .modal-content {
    animation: modal-exit 0.3s ease forwards;
}
@keyframes modal-enter {
    from { transform: translateY(20px) scale(0.95); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}
@keyframes modal-exit {
    from { transform: translateY(0) scale(1); opacity: 1; }
    to { transform: translateY(20px) scale(0.95); opacity: 0; }
}
.modal-content h2 {
    margin: 0;
    font-weight: 700;
}

.card-back-options { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.back-option {
    width: 64px;
    height: 90px;
    border-radius: 8px;
    cursor: pointer;
    border: 3px solid transparent;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}
.back-option .card-face--back { border: none; }
.back-option:hover {
    border-color: var(--glow);
    transform: scale(1.05);
    z-index: 1;
}
.back-option.active {
    border-color: var(--glow);
    transform: scale(1.08);
    box-shadow: 0 0 12px 2px var(--glow);
    z-index: 2;
}

/* --- CSS Card Backs --- */
.card-face--back { border: 1px solid #444; }
body.card-back-waves .card .card-face--back,
.back-option.card-back-waves .card-face--back {
    background-color: #a2d2ff; background-image: radial-gradient(circle at 50% 0, #bde0fe 25%, transparent 25.5%), radial-gradient(circle at 0 50%, #bde0fe 25%, transparent 25.5%), radial-gradient(circle at 100% 50%, #bde0fe 25%, transparent 25.5%), radial-gradient(circle at 50% 100%, #bde0fe 25%, transparent 25.5%); background-size: 40px 40px; border-color: #6c9dbd;
}
body.card-back-herringbone .card .card-face--back,
.back-option.card-back-herringbone .card-face--back {
    background-color: #3d405b; background-image: linear-gradient(135deg, #81b29a 25%, transparent 25%), linear-gradient(225deg, #81b29a 25%, transparent 25%), linear-gradient(45deg, #81b29a 25%, transparent 25%), linear-gradient(315deg, #81b29a 25%, #3d405b 25%); background-position: 10px 0, 10px 0, 0 0, 0 0; background-size: 20px 20px; background-repeat: repeat; border-color: #2c2e40;
}
body.card-back-sunset .card .card-face--back,
.back-option.card-back-sunset .card-face--back {
    background: linear-gradient(160deg, #f28482, #f6bd60, #84a59d); border-color: #6a847e;
}
body.card-back-linen .card .card-face--back,
.back-option.card-back-linen .card-face--back {
    background-color: #fcf4e2; background-image: linear-gradient(45deg, #e3d5b8 25%, transparent 25%, transparent 75%, #e3d5b8 75%, #e3d5b8), linear-gradient(45deg, #e3d5b8 25%, transparent 25%, transparent 75%, #e3d5b8 75%, #e3d5b8); background-size: 20px 20px; background-position: 0 0, 10px 10px; border-color: #c9bba4;
}
body.card-back-nordic .card .card-face--back,
.back-option.card-back-nordic .card-face--back {
    background-color: #2b2d42; background-image: linear-gradient(white 2px, transparent 2px), linear-gradient(90deg, white 2px, transparent 2px), linear-gradient(hsla(0,0%,100%,.3) 1px, transparent 1px), linear-gradient(90deg, hsla(0,0%,100%,.3) 1px, transparent 1px); background-size: 50px 50px, 50px 50px, 10px 10px, 10px 10px; background-position: -2px -2px, -2px -2px, -1px -1px, -1px -1px; border-color: #1e1f2e;
}
body.card-back-midnight .card .card-face--back,
.back-option.card-back-midnight .card-face--back {
    background-color: #121212; background-image: linear-gradient(#ffffff20 1px, transparent 1px), linear-gradient(90deg, #ffffff20 1px, transparent 1px); background-size: 22px 22px; border-color: #1e1e1e;
}
body.card-back-diamond .card .card-face--back,
.back-option.card-back-diamond .card-face--back {
    background-color: #f8f8f8; background-image: linear-gradient(45deg, #ddd 25%, transparent 25%), linear-gradient(-45deg, #ddd 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #ddd 75%), linear-gradient(-45deg, transparent 75%, #ddd 75%); background-size: 28px 28px; background-position: 0 0, 0 14px, 14px -14px, -14px 0px; border-color: #c2c2c2;
}
body.card-back-royal .card .card-face--back,
.back-option.card-back-royal .card-face--back {
    background: repeating-linear-gradient(45deg, #224488, #224488 12px, #2c5ab0 12px, #2c5ab0 24px); border-color: #1b3561;
}
body.card-back-fade .card .card-face--back,
.back-option.card-back-fade .card-face--back {
    background: linear-gradient(160deg, #2c3e50, #34495e, #2c3e50); border: 1px solid #1a242f;
}

/* =================================== */
/* ======= RESPONSIVE STYLES ======= */
/* =================================== */

/* For Mobile Top Bar (anything below 768px wide) */
@media (max-width: 768px) {
    .topbar {
        justify-content: center; /* Center the items that wrap */
        padding-bottom: 16px;
    }
    .topbar h1 {
        width: 100%;
        text-align: center;
        margin-bottom: 8px; /* Add space below title */
    }
    .scores {
        order: 3; /* Move scores below controls */
        width: 100%;
        justify-content: center;
        margin: 8px 0 0 0; /* Center it with top margin */
    }
    .controls {
        order: 2; /* Keep controls above scores */
        justify-content: center;
    }
}

/* For Mobile Screens (anything below 600px wide) */
@media (max-width: 600px) {
    .foundations {
        gap: 5px;
    }
}

/* For Tablets (screens 768px and wider) */
@media (min-width: 768px) {
    :root {
        --card-width: max(7vmin, 75px);
    }
}

/* For Laptops & Desktops (screens 1024px and wider) */
@media (min-width: 1024px) {
    :root {
        --card-width: max(7.5vmin, 90px);
    }
}