:root {
    --comic-yellow: #ffeb3b;
    --comic-blue: #2196f3;
    --comic-pink: #ff4081;
    --comic-green: #4caf50;
    --dark: #212121;
}

body {
    font-family: 'Arial Black', sans-serif;
    background-color: #ffcc00;
    background-image: radial-gradient(circle, #ffdb4d 20%, transparent 20%), 
                      radial-gradient(circle, #ffdb4d 20%, transparent 20%);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: white;
    width: 90%;
    max-width: 550px;
    padding: 30px;
    border: 6px solid var(--dark);
    border-radius: 40px;
    box-shadow: 12px 12px 0px var(--dark);
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    text-transform: uppercase;
    -webkit-text-stroke: 2px var(--dark);
    color: var(--comic-blue);
    text-shadow: 4px 4px 0px var(--comic-yellow);
    margin-bottom: 20px;
}

h3 {
    font-size: 1.3rem;
    margin: 15px 0 10px 0;
    color: var(--dark);
}

/* Nameneingabefeld - größer */
#spieler-name {
    width: 90%;
    padding: 18px;
    font-size: 1.4rem;
    border: 4px solid var(--dark);
    border-radius: 20px;
    margin-bottom: 20px;
    font-family: 'Arial Black', sans-serif;
    font-weight: bold;
    text-align: center;
    background: #e3f2fd;
    box-shadow: 0 4px 0 var(--dark);
}

#spieler-name::placeholder {
    color: #999;
    font-weight: normal;
}

input[type="text"] {
    width: 90%;
    padding: 12px;
    font-size: 1.1rem;
    border: 3px solid var(--dark);
    border-radius: 15px;
    margin-bottom: 15px;
    font-family: 'Arial Black', sans-serif;
}

.row-selection {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-bottom: 20px;
}

.row-box {
    background: #2196f3;
    color: white;
    padding: 12px 8px;
    border: 3px solid var(--dark);
    border-radius: 12px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.row-box:hover {
    transform: scale(1.05);
}

.op-selection {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.op-selection label {
    font-size: 1rem;
    cursor: pointer;
    margin: 0;
}

.num-btn {
    background: white;
    border: 4px solid var(--dark);
    padding: 20px;
    font-size: 2.2rem;
    border-radius: 20px;
    box-shadow: 0 6px 0 var(--dark);
    transition: all 0.1s;
    cursor: pointer;
    font-weight: bold;
}

.num-btn:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 var(--dark);
}

.action-btn {
    background: var(--comic-pink);
    color: white;
}

.ok-btn {
    background: var(--comic-green);
    color: white;
}

/* Numpad wie Handy-Tastatur angeordnet */
.numpad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 20px 0;
}

/* Reihe 1: 1, 2, 3 */
.numpad .num-btn:nth-child(1),
.numpad .num-btn:nth-child(2),
.numpad .num-btn:nth-child(3) {
    /* Standard 1-3 */
}

/* Reihe 2: 4, 5, 6 */
.numpad .num-btn:nth-child(4),
.numpad .num-btn:nth-child(5),
.numpad .num-btn:nth-child(6) {
    /* Standard 4-6 */
}

/* Reihe 3: 7, 8, 9 */
.numpad .num-btn:nth-child(7),
.numpad .num-btn:nth-child(8),
.numpad .num-btn:nth-child(9) {
    /* Standard 7-9 */
}

/* Reihe 4: Löschen, 0, OK */
.numpad .num-btn:nth-child(10) {
    /* Löschen-Button */
}

.numpad .num-btn:nth-child(11) {
    /* 0-Button */
}

.numpad .num-btn:nth-child(12) {
    /* OK-Button */
}

#fortschritt {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--dark);
    margin-bottom: 20px;
    background: #fff3cd;
    padding: 10px;
    border-radius: 10px;
}

#aufgabe {
    font-size: 5.5rem;
    color: var(--dark);
    margin: 20px 0;
    background: #f0f0f0;
    border-radius: 20px;
    border: 4px dashed var(--dark);
    padding: 20px;
}

#display {
    font-size: 3.5rem;
    margin-bottom: 15px;
    color: var(--comic-blue);
    height: 1.2em;
    font-weight: bold;
}

#feedback {
    font-size: 1.5rem;
    font-weight: bold;
    margin-top: 15px;
    height: 2em;
}

#end-screen h1 {
    font-size: 3rem;
    margin-bottom: 30px;
}

#ergebnis-text {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hidden {
    display: none !important;
}