:root {
    --muc-bg: linear-gradient(135deg, #f5f7ff 0%, #e9eeff 100%);
    --muc-card-bg: rgba(255, 255, 255, 0.75);
    --muc-card-border: rgba(255, 255, 255, 0.5);
    --muc-primary: #5c6bc0;
    --muc-primary-dark: #3f51b5;
    --muc-text: #1e293b;
    --muc-text-light: #64748b;
    --muc-shadow: 0 25px 45px -12px rgba(0, 0, 0, 0.2);
    --muc-blur: blur(12px);
    --muc-radius: 32px;
    --muc-radius-sm: 20px;
    --muc-transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.muc-glass-converter {
    max-width: 750px;
    margin: 2rem auto;
    background: var(--muc-card-bg);
    backdrop-filter: var(--muc-blur);
    border-radius: var(--muc-radius);
    border: 1px solid var(--muc-card-border);
    box-shadow: var(--muc-shadow);
    overflow: hidden;
    transition: var(--muc-transition);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

/* Category tabs with icons */
.muc-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1.2rem 1.5rem 0 1.5rem;
    background: rgba(255,255,255,0.4);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.muc-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    background: rgba(255,255,255,0.5);
    border: none;
    border-radius: 60px;
    color: var(--muc-text-light);
    cursor: pointer;
    transition: var(--muc-transition);
    backdrop-filter: blur(4px);
}

.muc-tab span:first-child {
    font-size: 1.1rem;
}

.muc-tab:hover {
    background: white;
    color: var(--muc-primary);
    transform: translateY(-2px);
}

.muc-tab-active {
    background: var(--muc-primary);
    color: white;
    box-shadow: 0 8px 20px -8px var(--muc-primary);
}

.muc-tab-active:hover {
    background: var(--muc-primary-dark);
    color: white;
}

/* Converter card */
.muc-converter-card {
    padding: 2rem 1.8rem 2rem 1.8rem;
}

/* Input group */
.muc-input-group {
    margin-bottom: 1.8rem;
}

.muc-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muc-primary);
    margin-bottom: 0.5rem;
}

.muc-input {
    width: 100%;
    padding: 1rem 1rem;
    font-size: 1.4rem;
    font-weight: 500;
    background: rgba(255,255,255,0.8);
    border: 2px solid rgba(255,255,255,0.6);
    border-radius: var(--muc-radius-sm);
    color: var(--muc-text);
    transition: var(--muc-transition);
    outline: none;
    box-sizing: border-box;
}

.muc-input:focus {
    border-color: var(--muc-primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(92,107,192,0.2);
}

/* Units row */
.muc-units-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.muc-unit-field {
    flex: 1;
    min-width: 140px;
}

.muc-select {
    width: 100%;
    padding: 0.9rem 1rem;
    background: rgba(255,255,255,0.8);
    border: 2px solid rgba(255,255,255,0.6);
    border-radius: var(--muc-radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--muc-text);
    cursor: pointer;
    transition: var(--muc-transition);
    outline: none;
}

.muc-select:focus {
    border-color: var(--muc-primary);
    background: white;
}

/* Swap button */
.muc-swap-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
}

.muc-swap-btn {
    background: white;
    border: none;
    border-radius: 60px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--muc-transition);
    color: var(--muc-primary);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.muc-swap-btn:hover {
    background: var(--muc-primary);
    color: white;
    transform: rotate(180deg) scale(1.05);
}

/* Result panel with glass effect */
.muc-result {
    background: linear-gradient(120deg, rgba(92,107,192,0.1), rgba(63,81,181,0.05));
    border-radius: var(--muc-radius-sm);
    padding: 1.6rem;
    text-align: center;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.5);
}

.muc-result-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muc-primary);
    margin-bottom: 0.5rem;
}

.muc-result-value {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--muc-text);
    word-break: break-word;
}

.muc-result-unit {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--muc-text-light);
    margin-left: 0.3rem;
}

/* Loading */
.muc-loading {
    padding: 3rem;
    text-align: center;
    color: var(--muc-text-light);
}

/* Responsive */
@media (max-width: 600px) {
    .muc-tabs {
        padding: 1rem;
        gap: 0.3rem;
    }
    .muc-tab {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    .muc-converter-card {
        padding: 1.5rem;
    }
    .muc-units-row {
        flex-direction: column;
        gap: 0.8rem;
    }
    .muc-swap-wrapper {
        margin: 0.5rem 0;
    }
    .muc-result-value {
        font-size: 1.8rem;
    }
}