/* ================================
   GRUNDLAYOUT & FARBEN
================================ */
:root {
    --bg-dark: #0b1724;
    --bg-panel: #111827;
    --bg-card: #1f2933;
    --border-color: #2d3748;
    --text-light: #f5f5f5;

    --uno-red: #e53e3e;
    --uno-yellow: #ecc94b;
    --uno-green: #38a169;
    --uno-blue: #3182ce;
    --uno-black: #2d3748;

    --card-font-size: 0.95rem;
    --card-padding-y: 0.35rem;
    --card-padding-x: 0.55rem;
    --card-min-width: 60px;
}

/* ================================
   BODY
================================ */
body {
    font-family: system-ui, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg-dark);
    color: var(--text-light);
}

/* ================================
   HEADER
================================ */
header {
    background: linear-gradient(135deg, #1a365d, #2b6cb0);
    padding: 1.8rem 2rem;
    text-align: center;
}

header h1 {
    font-size: 2.2rem;
    margin: 0 0 0.5rem 0;
}

header p {
    font-size: 1.1rem;
    margin: 0;
}

/* ================================
   SEKTIONEN
================================ */
.controls,
.results {
    background: var(--bg-panel);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.35);
}

h2, h3 {
    margin-top: 0;
}

/* ================================
   FORM ELEMENTE
================================ */
input[type="number"],
select {
    padding: 0.4rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-light);
    margin-left: 0.5rem;
}

.primary-button {
    padding: 0.6rem 1.2rem;
    background: var(--uno-yellow);
    color: #1a202c;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 1rem;
    transition: 0.2s;
}

.primary-button:hover {
    background: #f6e05e;
}

/* ================================
   FEHLER & ERFOLG
================================ */
.message-error {
    color: #f56565;
    margin: 0.5rem 0;
}

.message-success {
    background: rgba(56,161,105,0.18);
    border: 1px solid #38a169;
    padding: 1rem;
    border-radius: 6px;
}

/* ================================
   RECHENWEG
================================ */
.calculation-box {
    background: #0f1a2b;
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
    line-height: 1.5;
}

/* ================================
   KARTENBEREICH
================================ */
.cards-container {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.suit-row {
    display: flex;
    gap: 0.7rem;
    align-items: center;
}

.suit-label {
    min-width: 90px;
    font-weight: bold;
    font-size: 1rem;
}

/* Kartenliste */
.suit-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

/* Einzelne Karte */
.card-checkbox {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--card-padding-y) var(--card-padding-x);
    border-radius: 4px;
    cursor: pointer;
    min-width: var(--card-min-width);
    font-size: var(--card-font-size);
    transition: 0.15s;
    user-select: none;
}

.card-checkbox:hover {
    background: #2d3748;
}

/* deaktiviert */
.card-unavailable {
    background: #5a1a1a;   /* dunkles Rot */
    border-color: #7a2a2a;
    color: #ffffff;
}

/* ================================
   UNO-FARBEN (optional)
================================ */
.card-checkbox span {
    font-weight: 600;
}

[data-color="Rot"] .card-checkbox span {
    color: var(--uno-red);
}

[data-color="Gelb"] .card-checkbox span {
    color: var(--uno-yellow);
}

[data-color="Grün"] .card-checkbox span {
    color: var(--uno-green);
}

[data-color="Blau"] .card-checkbox span {
    color: var(--uno-blue);
}

[data-color="Schwarz"] .card-checkbox span {
    color: #ffffff;
}

/* ================================
   RESPONSIVE
================================ */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.6rem;
    }

    .suit-label {
        min-width: 70px;
    }

    .card-checkbox {
        min-width: 48px;
        font-size: 0.85rem;
    }
}

/* Einheitliche Kartengröße */
.card-checkbox {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 100px;      /* feste Breite */
    height: 30px;      /* feste Höhe */

    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;

    padding: 0;        /* Padding entfernen, da feste Größe */
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;

    cursor: pointer;
    transition: 0.15s;
    user-select: none;
    overflow: hidden;  /* verhindert Layoutsprünge */
    white-space: nowrap;
}