.aztc-calculator {
    --aztc-bg: #f8fafc;
    --aztc-card: #ffffff;
    --aztc-text: #0f172a;
    --aztc-muted: #64748b;
    --aztc-border: #dbe3ef;
    --aztc-primary: #2563eb;
    --aztc-primary-dark: #1d4ed8;
    --aztc-danger: #dc2626;
    width: 100%;
    max-width: 980px;
    margin: 0 auto;
    color: var(--aztc-text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.aztc-calculator *,
.aztc-calculator *::before,
.aztc-calculator *::after {
    box-sizing: border-box;
}

.aztc-calculator__form,
.aztc-calculator__chart-panel,
.aztc-calculator__result {
    background: var(--aztc-card);
    border: 1px solid var(--aztc-border);
    border-radius: 22px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

.aztc-calculator__form {
    padding: 28px;
}

.aztc-calculator__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.aztc-calculator__column {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.aztc-calculator__field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.aztc-calculator__label {
    color: var(--aztc-text);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
}

.aztc-calculator__control {
    width: 100%;
    min-height: 48px;
    border: 1px solid var(--aztc-border);
    border-radius: 14px;
    background: #ffffff;
    color: var(--aztc-text);
    font: inherit;
    padding: 11px 14px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.aztc-calculator__control:focus {
    border-color: var(--aztc-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.aztc-calculator__split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 120px;
    gap: 12px;
}

.aztc-calculator__button {
    width: 100%;
    min-height: 52px;
    margin-top: 24px;
    border: 0;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--aztc-primary), var(--aztc-primary-dark));
    color: #ffffff;
    cursor: pointer;
    font: inherit;
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.01em;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.24);
}

.aztc-calculator__button:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 34px rgba(37, 99, 235, 0.28);
}

.aztc-calculator__button:disabled {
    cursor: not-allowed;
    opacity: 0.72;
    transform: none;
}

.aztc-calculator__message {
    margin-top: 16px;
    border-radius: 14px;
    background: #eff6ff;
    color: var(--aztc-primary-dark);
    padding: 12px 14px;
    font-size: 14px;
    font-weight: 700;
}

.aztc-calculator__message--error {
    background: #fef2f2;
    color: var(--aztc-danger);
}

.aztc-calculator__message:empty,
.aztc-calculator__message[hidden] {
    display: none;
}

.aztc-calculator__chart-panel {
    margin-top: 22px;
    padding: 20px;
    overflow: hidden;
}

.aztc-calculator__chart-panel[hidden] {
    display: none;
}

.aztc-calculator__chart {
    display: block;
    width: 100%;
    max-width: 100%;
}

.aztc-calculator__result {
    margin-top: 18px;
    padding: 18px 20px;
    text-align: center;
    color: var(--aztc-text);
    font-size: 16px;
    font-weight: 800;
}

.aztc-calculator__result:empty {
    display: none;
}

@media (max-width: 760px) {
    .aztc-calculator__form {
        padding: 22px;
    }

    .aztc-calculator__grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .aztc-calculator__split {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .aztc-calculator__form,
    .aztc-calculator__chart-panel,
    .aztc-calculator__result {
        border-radius: 18px;
    }

    .aztc-calculator__form {
        padding: 18px;
    }

    .aztc-calculator__chart-panel {
        padding: 12px;
    }

    .aztc-calculator__control,
    .aztc-calculator__button {
        border-radius: 13px;
    }
}