:root {
  --dt-primary: #0a0e17;
  --dt-secondary: #1a2138;
  --dt-accent: #d4af37;
  --dt-accent-light: #f0e6c2;
  --dt-text: #fff;
  --dt-radius: 10px;
  --dt-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.calculator-wrapper {
    background: linear-gradient(160deg, var(--dt-secondary) 0%, var(--dt-primary) 100%);
    border: 1px solid rgba(212, 175, 55, 0.2);
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.2), 0 10px 40px rgba(0,0,0,0.4);
    padding: 1.5rem;
    border-radius: var(--dt-radius);
    max-width: 960px; /* Increased max-width for desktop */
    margin: 0 auto;
}

.hand-selection-area {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: stretch; /* Make columns same height */
}

.card-selection-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-selection-group h3 {
    color: var(--dt-accent-light);
    margin-bottom: 1rem;
    text-align: center;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.selected-cards-display {
    min-height: 145px; /* Increased to fit larger cards */
    background: rgba(0,0,0,0.3);
    border: 1px dashed rgba(212, 175, 55, 0.2);
    border-radius: 8px;
    padding: 0.75rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem; /* Increased gap for larger cards */
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.selected-cards-display .playing-card.small {
    cursor: pointer;
    transition: transform 0.2s ease;
}

.selected-cards-display .playing-card.small:hover {
    transform: translateY(-5px) scale(1.05);
}

.card-picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr)); /* Better grid sizing */
    gap: 0.5rem;
    background: rgba(0,0,0,0.2);
    padding: 1rem;
    border-radius: 8px;
    margin-top: auto;
    transition: opacity 0.3s ease;
}

.card-picker.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.card-btn {
    padding: 0.8rem 0.5rem;
    font-size: 1.1rem;
    font-weight: bold;
    background-color: #232a3d;
    border: 1px solid #4d5c8a;
    color: #fff;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-btn:hover {
    background-color: #4d5c8a;
    transform: translateY(-2px);
}

.card-btn.selected {
    background-color: var(--dt-accent);
    color: var(--dt-primary);
    border-color: var(--dt-accent-light);
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.4);
}

.calculator-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.calculator-actions .btn {
    padding: 0.8rem 2rem;
    font-size: 1rem;
    font-weight: 600;
}

#result-area {
    text-align: center;
    padding: 1.5rem;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 8px;
    font-size: 1.5rem;
    color: #fff;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

#result-area:empty {
    display: none;
}

#result-area .decision {
    font-weight: bold;
    font-size: 2.5rem;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

#result-area .decision i {
    font-size: 2.5rem;
}

#result-area .explanation {
    font-size: 1rem;
    color: var(--dt-accent-light);
    margin-top: 0.5rem;
    max-width: 400px;
}

/* Decision-specific styles */
#result-area.decision-hit { border-color: #2e7d32; background: #1e2e1e4d; }
#result-area.decision-hit .decision { color: #7fff7f; }
#result-area.decision-stand { border-color: #1565c0; background: #1e25384d; }
#result-area.decision-stand .decision { color: #82b1ff; }
#result-area.decision-double { border-color: #d4af37; background: #2e23204d; }
#result-area.decision-double .decision { color: #ffd700; }
#result-area.decision-split { border-color: #8e24aa; background: #2e1e2e4d; }
#result-area.decision-split .decision { color: #e1bee7; }
#result-area.decision-bust { border-color: #c83333; background: #381e1e4d; }
#result-area.decision-bust .decision { color: #ff8a80; }

/* --- WHITE MODERN CARD STYLING (LARGE) --- */
.playing-card.small {
    width: 90px;
    height: 126px;
    background: linear-gradient(145deg, #ffffff, #e9e9e9);
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.12), inset 0 1px 0px 0px rgba(255,255,255,0.8);
}

.playing-card.small:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 14px 30px rgba(0,0,0,0.18);
    border-color: #D4AF37; /* --gold */
}

.playing-card.small .top-left {
    top: 10px;
    left: 12px;
}

.playing-card.small .bottom-right {
    bottom: 10px;
    right: 12px;
    transform: rotate(180deg);
}

.playing-card.small .card-rank {
    font-size: 1.8rem;
    font-weight: 700;
}

.playing-card.small .card-suit {
    font-size: 1.3rem;
    margin-top: 3px;
}

.playing-card.small .card-rank,
.playing-card.small .card-suit {
    text-shadow: 0 1px 1px rgba(255,255,255,0.5);
}

/* Color coding for suits on light background */
.playing-card.small.black .card-rank,
.playing-card.small.black .card-suit {
    color: #212121;
}

.playing-card.small.red .card-rank,
.playing-card.small.red .card-suit {
    color: #D32F2F; /* A standard, strong red */
}


/* --- WHITE CARD BUTTONS --- */
.card-btn {
    background: linear-gradient(145deg, #fdfdfd, #f1f1f1) !important;
    color: #212121 !important;
    border: 1px solid #ccc !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05) !important;
}

.card-btn:hover {
    border-color: #D4AF37 !important;
    color: #996515 !important;
    transform: translateY(-3px) scale(1.05) !important;
    background: #fff !important;
}

.card-btn.selected {
    background: #D4AF37 !important;
    color: #000000 !important;
    border-color: #F4E5C2 !important;
    transform: scale(1.05) !important;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.4) !important;
}

/* --- CALCULATOR ACTION BUTTONS --- */
.calculator-actions .btn {
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

#calculate-btn {
    background: var(--dt-accent);
    color: var(--dt-primary);
    border-color: var(--dt-accent);
}

#calculate-btn:hover {
    background: #F4E5C2; /* --gold-light */
    border-color: #F4E5C2;
    color: #1E1E1E;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.3);
}

#reset-btn {
    background: #232a3d;
    color: #F4E5C2;
    border-color: #4d5c8a;
}

#reset-btn:hover {
    background: #4d5c8a;
    border-color: #996515;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}


@media (max-width: 768px) {
    .calculator-wrapper {
        padding: 1rem;
    }
    .hand-selection-area {
        flex-direction: column;
        gap: 2rem;
    }
    .card-picker {
        grid-template-columns: repeat(auto-fill, minmax(45px, 1fr));
        gap: 0.4rem;
        padding: 0.5rem;
    }
    .card-btn {
        font-size: 1rem;
    }
    .selected-cards-display {
        min-height: 70px;
        gap: 2px;
    }
    .selected-cards-display .playing-card.small {
        width: 60px !important;
        height: 85px !important;
    }
}

@media (max-width: 480px) {
    .card-picker {
        grid-template-columns: repeat(5, 1fr);
    }
    .calculator-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    #result-area .decision {
        font-size: 2rem;
    }
    #result-area .decision i {
        font-size: 2rem;
    }
}