/**
 * BeambePrep Floating Precision Virtual Calculator (TI-108 Engine)
 * Reusable across Web QBank Grind Mode, Swarm Mode Arena, and Editorial Blogs.
 * Zero-emoji, zero em-dash compliance.
 */

.ucat-calc-modal {
    position: fixed;
    top: 90px;
    right: 30px;
    width: 290px;
    background: #0E131F;
    border: 1.5px solid rgba(0, 229, 255, 0.4);
    border-radius: 14px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.85);
    z-index: 10050;
    display: none;
    user-select: none;
}

.calc-header {
    background: #141A29;
    padding: 8px 12px;
    border-radius: 12px 12px 0 0;
    cursor: move;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.calc-screen {
    background: #070B12;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    padding: 8px 12px;
    margin: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 44px;
}

.calc-memory-indicator {
    color: #FFC107;
    font-family: monospace;
    font-weight: bold;
    font-size: 1rem;
    width: 20px;
}

.calc-display-digits {
    color: #00E5FF;
    font-family: "Courier New", Courier, monospace;
    font-size: 1.5rem;
    font-weight: 700;
    text-align: right;
    letter-spacing: 1px;
    flex-grow: 1;
    overflow: hidden;
}

.calc-body {
    padding: 0 10px 10px 10px;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.btn-calc {
    background: #182030;
    color: #F5F5F5;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 10px 0;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-calc:hover {
    background: #253046;
    border-color: #00E5FF;
    color: #FFFFFF;
}

.btn-calc:active {
    transform: scale(0.96);
}

.btn-calc.calc-mem {
    background: #101E33;
    color: #00E5FF;
    font-size: 0.85rem;
}

.btn-calc.calc-clear {
    background: #331518;
    color: #FF5252;
}

.btn-calc.calc-clear:hover {
    background: #4D1A20;
    border-color: #FF5252;
}

.btn-calc.calc-op {
    background: #232215;
    color: #FFC107;
    font-size: 1.15rem;
}

.btn-calc.calc-op:hover {
    background: #36341B;
    border-color: #FFC107;
}

.btn-calc.calc-equals {
    background: #FFC107;
    color: #050505;
    font-weight: 900;
    font-size: 1.25rem;
}

.btn-calc.calc-equals:hover {
    background: #FFD54F;
}