:root {
    --kuc-primary: #b35a38;
    --kuc-primary-hover: #964a2e;
    --kuc-secondary: #fce9d5;
    --kuc-bg: transparent;
    --kuc-card-bg: rgba(255, 255, 255, 0.75);
    --kuc-text: #2d2d2d;
    --kuc-text-muted: #666;
    --kuc-border: rgba(255, 255, 255, 0.5);
    --kuc-radius: 32px;
    --kuc-shadow: 0 40px 100px rgba(179, 90, 56, 0.12);
    --kuc-font: 'Onest', system-ui, sans-serif;
    --kuc-blur: blur(20px);
}

#kuc-app {
    font-family: var(--kuc-font);
    color: var(--kuc-text);
    background: var(--kuc-card-bg);
    backdrop-filter: var(--kuc-blur);
    -webkit-backdrop-filter: var(--kuc-blur);
    border-radius: var(--kuc-radius);
    box-shadow: var(--kuc-shadow);
    padding: 5rem;
    border: 1px solid var(--kuc-border);
    animation: kuc-slide-up 1.2s cubic-bezier(0.23, 1, 0.32, 1);
    max-width: 900px;
    margin: 0 auto;
}

@keyframes kuc-slide-up {
    from {
        opacity: 0;
        transform: translateY(60px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kuc-header {
    margin-bottom: 4rem;
}

.kuc-brand-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.kuc-logo-text {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--kuc-primary);
    letter-spacing: -0.01em;
}

.kuc-status-badges {
    display: flex;
    gap: 1rem;
}

.kuc-badge {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.5rem 1rem;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 100px;
    color: #aaa;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kuc-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
}

.kuc-badge-active {
    background: rgba(179, 90, 56, 0.08);
    color: var(--kuc-primary);
}

.kuc-converter-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 4rem;
    align-items: flex-end;
    margin-bottom: 4rem;
}

@media (max-width: 768px) {
    .kuc-converter-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .kuc-swap-btn {
        transform: rotate(90deg);
        margin: 1rem auto;
    }

    #kuc-app {
        padding: 2.5rem;
    }
}

.kuc-field {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.kuc-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--kuc-primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    opacity: 0.9;
}

.kuc-input,
.kuc-select {
    width: 100%;
    padding: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 20px;
    font-size: 1.15rem;
    background: rgba(0, 0, 0, 0.02);
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    color: var(--kuc-text);
    font-family: var(--kuc-font);
}

.kuc-input:focus,
.kuc-select:focus {
    outline: none;
    border-color: var(--kuc-primary);
    background: #fff;
    box-shadow: 0 15px 35px rgba(179, 90, 56, 0.08);
    transform: translateY(-2px);
}

.kuc-swap-btn {
    background: var(--kuc-secondary);
    color: var(--kuc-primary);
    border: none;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 20px rgba(179, 90, 56, 0.1);
}

.kuc-swap-btn:hover {
    transform: rotate(180deg) scale(1.1);
    background: var(--kuc-primary);
    color: white;
    box-shadow: 0 20px 40px rgba(179, 90, 56, 0.2);
}

.kuc-ingredient-field {
    margin-bottom: 4rem;
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.kuc-ingredient-field.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.kuc-result-area {
    margin: 5rem 0;
    padding: 5rem;
    background: var(--kc-gradient);
    border-radius: 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.kuc-result-value {
    font-size: 6rem;
    line-height: 1;
    font-weight: 400;
    color: var(--kuc-primary);
    font-family: 'Cormorant Garamond', serif;
    margin-bottom: 1.5rem;
    position: relative;
    transition: transform 0.3s ease;
}

.kuc-result-area.updating .kuc-result-value {
    transform: scale(1.05);
}

.kuc-result-label {
    font-size: 1.1rem;
    color: var(--kuc-text-muted);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

.kuc-copy-btn {
    position: relative;
    background: var(--kuc-primary);
    color: white;
    border: none;
    padding: 1.25rem 3.5rem;
    border-radius: 100px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 15px 35px rgba(179, 90, 56, 0.2);
}

.kuc-copy-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 25px 50px rgba(179, 90, 56, 0.3);
}

.kuc-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    padding-top: 4rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.kuc-precision-toggle {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.kuc-btn-secondary {
    padding: 1rem 2rem;
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.02);
}

.kuc-btn-secondary:hover {
    border-color: var(--kuc-primary);
    color: var(--kuc-primary);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.kuc-history-favs {
    margin-top: 6rem;
}

.kuc-tabs {
    display: flex;
    gap: 4rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    margin-bottom: 3rem;
}

.kuc-tab {
    padding-bottom: 1.25rem;
    cursor: pointer;
    font-weight: 800;
    color: #ccc;
    transition: all 0.4s ease;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    position: relative;
}

.kuc-tab.active {
    color: var(--kuc-primary);
}

.kuc-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1.5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--kuc-primary);
    border-radius: 10px;
}

.kuc-list {
    list-style: none;
    padding: 0;
}

.kuc-list-item {
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(0, 0, 0, 0.02);
    border-radius: 16px;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--kuc-text);
    font-weight: 500;
    transition: all 0.3s ease;
}

.kuc-list-item:hover {
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.03);
    transform: translateX(5px);
}

.kuc-quick-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 5rem;
}

.kuc-quick-btn {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.03);
    padding: 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 18px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    color: var(--kuc-text);
}

.kuc-quick-btn:hover {
    background: white;
    border-color: var(--kuc-primary);
    color: var(--kuc-primary);
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(179, 90, 56, 0.1);
}