/* ========================================================================
   MEMORY - Klassisches Kartenspiel
   ======================================================================== */

:root {
    --mem-card-size: 100px;
    --mem-card-gap: 10px;
    --mem-card-radius: 12px;
    --mem-bg: #1a2e1a;
    --mem-bg-light: #243a24;
    --mem-card-back-1: #4a2080;
    --mem-card-back-2: #6a30a0;
    --mem-card-face: #ffffff;
    --mem-matched-bg: #f0fff0;
    --mem-gold: #c8a84e;
    --mem-gold-light: #e8c86e;
}

/* --- Container --- */
.mem-game-container {
    background: radial-gradient(ellipse at center, var(--mem-bg-light) 0%, var(--mem-bg) 100%);
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    align-items: center;
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

/* --- Card Grid --- */
.mem-grid {
    display: grid;
    gap: var(--mem-card-gap);
    justify-content: center;
}

/* --- Card --- */
.mem-card {
    width: var(--mem-card-size);
    height: var(--mem-card-size);
    perspective: 800px;
    cursor: pointer;
}

.mem-card.mem-matched {
    cursor: default;
}

.mem-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
    transform-style: preserve-3d;
}

.mem-card.mem-flipped .mem-card-inner,
.mem-card.mem-matched .mem-card-inner {
    transform: rotateY(180deg);
}

.mem-card-front,
.mem-card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: var(--mem-card-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Card Back (Rueckseite) --- */
.mem-card-back {
    background: linear-gradient(135deg, var(--mem-card-back-1), var(--mem-card-back-2));
    border: 2px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.mem-card-back-pattern {
    position: absolute;
    inset: 6px;
    border-radius: 8px;
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    background:
        repeating-linear-gradient(
            45deg,
            transparent 0px,
            transparent 8px,
            rgba(255, 255, 255, 0.04) 8px,
            rgba(255, 255, 255, 0.04) 9px
        ),
        repeating-linear-gradient(
            -45deg,
            transparent 0px,
            transparent 8px,
            rgba(255, 255, 255, 0.04) 8px,
            rgba(255, 255, 255, 0.04) 9px
        );
}

.mem-card-back-pattern::after {
    content: '?';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.2);
}

.mem-card:hover .mem-card-back {
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* --- Card Front (Vorderseite) --- */
.mem-card-front {
    transform: rotateY(180deg);
    background: var(--mem-card-face);
    border: 2px solid #e0e0e0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    flex-direction: column;
    gap: 4px;
}

.mem-card-symbol {
    font-size: 42px;
    line-height: 1;
    transition: transform 0.3s ease;
}

.mem-card-label {
    font-size: 10px;
    color: #999;
    letter-spacing: 0.5px;
}

/* --- Matched State --- */
.mem-card.mem-matched .mem-card-front {
    background: var(--mem-matched-bg);
    border-color: #a0d8a0;
    box-shadow: 0 0 12px rgba(100, 200, 100, 0.25);
}

.mem-card.mem-matched .mem-card-symbol {
    transform: scale(1.1);
}

/* Match animation */
.mem-card.mem-just-matched .mem-card-inner {
    animation: memMatchPop 0.4s ease;
}

@keyframes memMatchPop {
    0% { transform: rotateY(180deg) scale(1); }
    50% { transform: rotateY(180deg) scale(1.15); }
    100% { transform: rotateY(180deg) scale(1); }
}

/* No-match shake */
.mem-card.mem-no-match .mem-card-inner {
    animation: memShake 0.4s ease;
}

@keyframes memShake {
    0%, 100% { transform: rotateY(180deg) translateX(0); }
    25% { transform: rotateY(180deg) translateX(-5px); }
    75% { transform: rotateY(180deg) translateX(5px); }
}

/* --- Progress Bar --- */
.mem-progress {
    display: flex;
    align-items: center;
    gap: 6px;
}

.mem-progress-track {
    width: 100px;
    height: 6px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    overflow: hidden;
}

.mem-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--mem-gold), var(--mem-gold-light));
    border-radius: 3px;
    transition: width 0.4s ease;
}

/* --- Stars (Rating) --- */
.mem-stars {
    font-size: 18px;
    letter-spacing: 2px;
    color: var(--mem-gold-light);
}

.mem-star-empty {
    opacity: 0.25;
}

/* --- Win Overlay --- */
.mem-win-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    z-index: 20000;
    animation: memFadeIn 0.5s ease;
    backdrop-filter: blur(6px);
}

.mem-win-card {
    background: linear-gradient(135deg, var(--mem-bg-light) 0%, var(--mem-bg) 100%);
    border: 3px solid var(--mem-gold);
    border-radius: 16px;
    padding: 40px 60px;
    text-align: center;
    color: #e0ddd4;
    box-shadow: 0 0 60px rgba(200, 168, 78, 0.3);
    animation: memScaleIn 0.5s ease 0.2s both;
}

.mem-win-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--mem-gold-light);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.mem-win-stars {
    font-size: 36px;
    letter-spacing: 6px;
    margin-bottom: 16px;
    color: var(--mem-gold-light);
}

.mem-win-stats {
    font-size: 16px;
    margin-bottom: 24px;
    line-height: 1.8;
}

.mem-win-stats strong {
    color: var(--mem-gold-light);
}

@keyframes memFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes memScaleIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

/* --- Responsive --- */
@media (max-width: 700px) {
    :root {
        --mem-card-size: 76px;
        --mem-card-gap: 8px;
    }
    .mem-card-symbol { font-size: 32px; }
    .mem-card-label { font-size: 8px; }
    .mem-card-back-pattern::after { font-size: 22px; }
}

@media (max-width: 500px) {
    :root {
        --mem-card-size: 58px;
        --mem-card-gap: 6px;
        --mem-card-radius: 8px;
    }
    .mem-card-symbol { font-size: 24px; }
    .mem-card-label { display: none; }
    .mem-card-back-pattern::after { font-size: 18px; }
    .mem-win-card { padding: 24px 32px; }
    .mem-win-title { font-size: 24px; }
}