:root {
    /************ LIGHTMODE FARBEN ************/
    --hintergrund: #f0f4f8;
    --hintergrund-2: #ffffff;
    --text: #1a202c;
    --text-2: #4a5568;
    --akzent: #3182ce;
    --akzent-hover: #2c5282;
    --karte-hintergrund: #ffffff;
    --karte-vorne: #4299e1;
    --schattten: rgba(0, 0, 0, 0.1);
    --border-farbe: #e2e8f0;
}

/************ DARKMODE FARBEN ************/
[data-theme="dark"] {
    --hintergrund: #0f1219;
    --hintergrund-2: #1c2128;
    --text: #f7fafc;
    --text-2: #cbd5e0;
    --akzent: #4299e1;
    --akzent-hover: #63b3ed;
    --karte-hintergrund: #1c2128;
    --karte-vorne: #2b6cb0;
    --schatten: rgba(0, 0, 0, 0.3);
    --border-farbe: #4a5568;
}

/************ RESET ************/
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Montserrat", sans-serif;
    font-weight: 400;
    background-color: var(--hintergrund);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    padding: 1rem;
}

/************ FOKUS-STYLES (BARRIEREFREIHEIT) ***********/
*:focus {
    outline: 3px solid var(--akzent);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 3px solid var(--akzent);
    outline-offset: 2px;
}

/*********** HEADER ************/
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding: 1rem;
    background-color: var(--hintergrund-2);
    border-radius: 1rem;
}

header h1{
    font-weight: 600;
}

header button {
    padding: 10px;
    border: solid 1px #f0f4f8;
    border-radius: 5px;
    cursor: pointer;
    margin-right: 5px;
}

header button:hover {
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    background-color: #0f1219;
    transition: all 0.3s;
}


/**********/

/*************** Dark Mode Button ***************/
#dark-mode-toggle {
    background-color: var(--karte-hintergrund);
    border: 0.5px solid var(--border-farbe);
    border-radius: 1rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 1.5rem;
    transition: all 0.3s;
}

#dark-mode-toggle:hover {
    transform: scale(1.1);
    background-color: var(--akzent);
}

#dark-mode-toggle:active {
    transform: scale(0.95);
}
/**********/

/* Statistik-Anzeige */
.stats {
    display: flex;
    gap: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-2);
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }
    
    .stats {
        width: 100%;
        justify-content: center;
    }
}

/* ========== CONTROLS (SPIELEINSTELLUNGEN) ========== */
.einstellungen {
    background-color: var(--hintergrund-2);
    padding: 1rem;
    border-radius: 1rem;
    margin-bottom: 1rem;
}

.einstellungen h2 {
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 1.25rem;
    font-weight: 600;
}

details{
    margin-bottom: 0.5rem;
    padding: 1rem;
    background-color: var(--hintergrund-2);
    border-radius: 1rem;
}

details > summary {
    cursor: pointer;
    font-weight: 500;
}

.size-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 200px));
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    gap: 1rem;
}

.size-inputs label {
    display: inline;
    color: var(--text);

}

.size-inputs input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-farbe);
    border-radius: 1rem;
    background-color: var(--karte-hintergrund);
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.3s;
    width: 100%;
}

.size-inputs input:focus {
    border-color: var(--akzent);
}

.size-inputs input:hover {
    border-color: var(--akzent);
}

.hint {
    font-size: 0.875rem;
    color: var(--text-2);
}

/* ========== SPIELMODUS-AUSWAHL ========== */
.spielmodus-auswahl {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 0.25rem;
}

.modus-label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 1rem;
    border: 1px solid var(--border-farbe);
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    background-color: var(--karte-hintergrund);
}

.modus-label:hover {
    border-color: var(--akzent);
    background-color: var(--hintergrund);
}

.modus-label input[type="radio"] {
    opacity: 0; position:absolute; width:0;
    margin-top: 2px;
    cursor: pointer;
    width: 15px;
    height: 15px;
    accent-color: var(--akzent);
}

.modus-label input[type="radio"]:checked + .modus-text {
    color: var(--akzent);
}

.modus-label:has(input:checked) {
    border-color: var(--akzent);
    background-color: var(--hintergrund);
}

.modus-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.modus-text strong {
    font-size: 1.1rem;
    color: var(--text);
}

.modus-text small {
    font-size: 0.875rem;
    color: var(--text-2);
}

/* ========== SPIELERNAMEN-EINGABE ========== */
.spieler-names {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(1rem);
    margin-bottom: 1.5rem;
    padding: var(1rem);
    background-color: var(--hintergrund);
    border-radius: 1rem;
    border: 2px dashed var(--akzent);
}

#spieler2-name{
border-radius: 10px;
    border: none;
    padding: 5px;
    margin-bottom: 15px;
}

#spieler1-name{
border-radius: 10px;
    border: none;
    padding: 5px;
    margin-bottom: 15px;
    margin-right: 5px;
}

.spieler-names label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    color: var(--text);
}

.spieler-names input {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-farbe);
    border-radius: 0.5rem;
    background-color: var(--karte-hintergrund);
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.spieler-names input:focus {
    border-color: var(--akzent);
}

/* ========== BILDKATEGORIE-AUSWAHL ========== */

.kategorie-optionen{
    padding-left: 1rem;
    padding-bottom: 1rem;
}

.kategorie-option {
    position: relative;
    cursor: pointer;
    display: inline-block;
}

/* Radio vollständig unsichtbar ABER klickbar */
.kategorie-option input[type="radio"] {
    position: absolute;
    inset: 0;             /* Macht den Input so groß wie das Label */
    opacity: 0;
    cursor: pointer;
    margin: 0;
}

/* Stil der Fläche */
.kategorie-text {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background-color: var(--karte-hintergrund);
    border: 2px solid var(--border-farbe);
    border-radius: 1rem;
    font-size: 1.5rem;
    transition: 0.3s;
}

/* Hover */
.kategorie-option:hover .kategorie-text {
    border-color: var(--akzent);
}

/* Checked Zustand */
.kategorie-option input[type="radio"]:checked + .kategorie-text {
    background-color: var(--akzent);
    color: white;
    border-color: var(--akzent);
}

/* ========== SPIELER-INFO (2-SPIELER-MODUS) ========== */
.spieler-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.spieler-card {
    background-color: var(--hintergrund-2);
    border-radius: 1rem;
    padding: 1rem;
    transition: all 0.3s;
}

/* Spieler 1 - Blau */
#player1-card {
    border-color: #93c5fd;
}

#player1-card.active {
    border-color: #3b82f6;
    animation: pulse-card 2s ease-in-out infinite;
}

/* Spieler 2 - Rot */
#player2-card {
    border-color: #fca5a5;
}

#player2-card.active {
    border-color: #ef4444;
    animation: pulse-card 2s ease-in-out infinite;
}

/* Gemeinsame Pulse-Animation für beide Spieler */
@keyframes pulse-card {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.spieler-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-farbe);
}

.spieler-nummer {
    font-size: 0.875rem;
    color: var(--text-2);
}

.spieler-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
}

#player1-card.active .spieler-name {
    color: #3b82f6;
}

#player2-card.active .spieler-name {
    color: #ef4444;
}

.spieler-statistiken {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
}

.spieler-statistiken .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-2);
}

.spieler-statistiken .stat strong {
    font-size: 1.5rem;
    color: var(--text);
    margin-top: 0.25rem;
}

#player1-card.active .spieler-statistiken .stat strong {
    color: #3b82f6;
}

#player2-card.active .spieler-statistiken .stat strong {
    color: #ef4444;
}

/* ========== GEWINN-DETAILS (2-SPIELER) ========== */
.gewonnen-details {
    margin: 1.5rem 0;
    padding: 1rem;
    background-color: var(--hintergrund-2);
    border-radius: 0.5rem;
}

.winner-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--akzent);
    margin-bottom: 0.5rem;
}

.score-comparison {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.score-item {
    padding: 0.5rem;
    background-color: var(--karte-hintergrund);
    border-radius: 0.25rem;
    text-align: center;
}

.score-item.winner {
    border: 2px solid var(--akzent);
}

.score-item .spieler-name-small {
    font-weight: 600;
    color: var(--text);
    display: block;
    margin-bottom: 0.25rem;
}

.score-item .score-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--akzent);
}

@media (max-width: 480px) {
    .spieler-info {
        grid-template-columns: 1fr;
    }
    
    .spielmodus-auswahl {
        grid-template-columns: 1fr;
    }
}

/* Buttons */
.einstellungen button {
    margin-right: 1rem;
    margin-top: 1rem;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 1rem;
    margin-left: 1rem;
}

.btn-primary {
    background-color: var(--akzent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--akzent-hover);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--hintergrund);
    color: var(--text);
    border: 1px solid var(--border-farbe);
}

.btn-secondary:hover {
    background-color: var(--border-farbe);
}

.btn-secondary:active {
    transform: translateY(0);
}

@media (max-width: 480px) {
    .einstellungen button {
        width: 100%;
        margin-right: 0;
    }
}

/* ========== MAIN & GAME BOARD ========== */
main {
    max-width: 1400px;
    margin: 0 auto;
}

.spielfeld {
    display: grid;
    gap: 1rem;
    justify-content: center;
    padding: 1rem;
    background-color: var(--hintergrund-2);
    border-radius: 1.5rem;
    margin-bottom: 2rem;
    min-height: 200px;
    border: 1x solid var(--border-farbe);
    transition: all 0.3s;
}

/* Spielfeld-Rahmen für aktiven Spieler */
.spielfeld.player1-turn {
    border-color: #3b82f6;
}

.spielfeld.player2-turn {
    border-color: #ef4444;
}

/* ========== MEMORY-KARTEN ========== */
.karte {
    aspect-ratio: 1;
    min-width: 60px;
    max-width: 150px;
    cursor: pointer;
    perspective: 1000px;
    background: transparent;
}

.karte-innen {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

/* Karte umgedreht */
.karte.flipped .karte-innen {
    transform: rotateY(180deg);
}

/* Matched-Karten */
.karte.matched {
    opacity: 0.6;
    pointer-events: none;
}

.karte.matched .karte-innen {
    animation: matchPulse 0.5s ease-in-out;
}

@keyframes matchPulse {
    0%, 100% { transform: rotateY(180deg) scale(1); }
    50% { transform: rotateY(180deg) scale(1.1); }
}

/* Vorder- und Rückseite */
.karte-vorne, .karten-hinten {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.karte-vorne {
    background-color: var(--karte-hintergrund);
    border: 2px solid var(--border-farbe);
}

.karte-vorne img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0.5rem;
}

.karten-hinten {
    background-color: var(--karte-hintergrund);
    transform: rotateY(180deg);
    border: 2px solid var(--border-farbe);
}

.karten-hinten img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0.85rem;
}

/* Hover-Effekt */
.karte:not(.flipped):not(.matched):hover .karte-innen {
    transform: scale(1.05);
}

.karte:not(.flipped):not(.matched):hover {
    filter: brightness(1.1);
}

/* Fokus für Tastatur-Navigation */
.karte:focus {
    outline: 3px solid var(--akzent);
    outline-offset: 4px;
}

/* Responsive Kartengröße */
@media (max-width: 768px) {
    .karte {
        min-width: 50px;
        max-width: 80px;
    }
    
    .spielfeld {
        gap: 0.5rem;
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .karte {
        min-width: 40px;
        max-width: 60px;
    }
}

/* ========== GEWINN-NACHRICHT ========== */
.gewonnen {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--hintergrund);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    z-index: 1000;
    min-width: 300px;
    max-width: 90%;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.gewonnen h2 {
    color: var(--akzent);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.gewonnen p {
    color: var(--text-2);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.gewonnen.hidden {
    display: none;
}

/* Overlay für Gewinn-Nachricht */
.gewonnen::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 1rem;
    border: solid 2px var(--akzent);
    z-index: -1;
}

/* ========== UTILITY-KLASSEN ========== */
.hidden {
    display: none !important;
}

/* ========== BARRIEREFREIHEIT ========== */

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-farbe: currentColor;
    }
    
    .karte-vorne,
    .karten-hinten,
    button {
        border: 1px solid currentColor;
    }
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ========== PRINT-STYLES ========== */
@media print {
    body {
        background: white;
        color: black;
    }
    
    header,
    .einstellungen,
    #dark-mode-toggle {
        display: none;
    }
}

/* ========== HINTERGRUNDBILD-AUSWAHL ========== */
.hintergrund-auswahl {
    margin: 1.5rem 0;
    padding: 1rem;
    background-color: var(--hintergrund-2);
    border-radius: 1rem;
}

.hintergrund-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.hintergrund-optionen {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hintergrund-option {
    flex: 1;
    min-width: 120px;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-farbe);
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    background-color: var(--hintergrund);
}

.hintergrund-option:hover {
    border-color: var(--akzent);
    background-color: var(--hintergrund-2);
}

.hintergrund-option input[type="radio"] {
    display: none;
}

.hintergrund-option input[type="radio"]:checked + .hintergrund-text {
    color: var(--akzent);
    font-weight: 600;
}

.hintergrund-option input[type="radio"]:checked ~ * {
    border-color: var(--akzent);
}

.hintergrund-option:has(input[type="radio"]:checked) {
    border-color: var(--akzent);
    background-color: var(--akzent);
    color: white;
}

.hintergrund-option:has(input[type="radio"]:checked) .hintergrund-text {
    color: white;
}

.hintergrund-text {
    display: block;
    text-align: center;
    user-select: none;
    color: var(--text);
}

/* Karten-Vorderseite mit Bild */
.karte-vorne img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0.9rem;
    display: none;
}

.karte-vorne:has(img[style*="display: block"]) .karten-icon {
    display: none;
}

.yay-link,
.yay-link:visited,
.yay-link:hover,
.yay-link:active {
    text-decoration: none;
}

.yay-link h2 {
    text-decoration: none;
    text-align: center;
    font-weight: 500;
    font-size: 10px;
}