.pac-cal-converter {
    --pac-cal-bg: #f7fbf9;
    --pac-cal-panel: #ffffff;
    --pac-cal-panel-soft: #fbfdfc;
    --pac-cal-border: #d9e7e1;
    --pac-cal-border-strong: #b8d0c6;
    --pac-cal-text: #253733;
    --pac-cal-muted: #5f746e;
    --pac-cal-accent: #19735f;
    --pac-cal-accent-dark: #125443;
    --pac-cal-result-bg: #edf7f2;
    --pac-cal-button-bg: #f5faf7;
    --pac-cal-error: #9d372c;
    --pac-cal-focus: #d6a84f;

    box-sizing: border-box;
    max-width: 720px;
    margin: 1rem 0;
    padding: 0.85rem;
    color: var(--pac-cal-text);
    background: var(--pac-cal-bg);
    border: 1px solid var(--pac-cal-border);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(31, 61, 53, 0.06);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", "Tahoma", sans-serif;
}

.pac-cal-converter *,
.pac-cal-converter *::before,
.pac-cal-converter *::after {
    box-sizing: inherit;
}

.pac-cal-header {
    margin-bottom: 0.65rem;
}

.pac-cal-title {
    margin: 0 0 0.12rem;
    color: var(--pac-cal-text);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.3;
}

.pac-cal-help {
    max-width: 56rem;
    margin: 0;
    color: var(--pac-cal-muted);
    font-size: 0.95rem;
    line-height: 1.35;
}

.pac-cal-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
}

.pac-cal-field {
    min-width: 0;
}

.pac-cal-label {
    display: block;
    margin: 0 0 0.28rem;
    color: var(--pac-cal-muted);
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.35;
}

.pac-cal-converter .pac-cal-input {
    display: block;
    width: 100%;
    min-height: 2.45rem;
    padding: 0.45rem 0.65rem;
    color: var(--pac-cal-text);
    background: #fff !important;
    border: 1px solid var(--pac-cal-border-strong);
    border-radius: 6px;
    box-shadow: 0 1px 2px rgba(31, 61, 53, 0.04);
    font: inherit;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", "Tahoma", sans-serif;
    font-size: 0.95rem;
    line-height: 1.4;
    appearance: none;
    transition: background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.pac-cal-converter .pac-cal-input::placeholder {
    color: #879a94;
    opacity: 1;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", "Tahoma", sans-serif;
    font-size: 0.95rem;
}

.pac-cal-converter .pac-cal-input:focus {
    outline: 2px solid transparent;
    background: #fff !important;
    border-color: var(--pac-cal-accent);
    box-shadow: 0 0 0 3px rgba(214, 168, 79, 0.26);
}

.pac-cal-error {
    margin: 0.22rem 0 0;
    color: var(--pac-cal-error);
    font-size: 0.84rem;
    line-height: 1.35;
}

.pac-cal-error:empty {
    display: none;
}

.pac-cal-actions {
    display: flex;
    justify-content: flex-start;
    margin-top: 0.55rem;
}

.pac-cal-converter .pac-cal-button {
    min-height: 0;
    padding: 8px 12px;
    color: var(--pac-cal-accent-dark) !important;
    background: var(--pac-cal-button-bg) !important;
    border: 1px solid #9ec4b5 !important;
    border-radius: 6px;
    cursor: pointer;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.2;
    box-shadow: none !important;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.pac-cal-converter .pac-cal-button:hover {
    color: var(--pac-cal-accent-dark) !important;
    background: #eef7f3 !important;
    border-color: var(--pac-cal-accent) !important;
}

.pac-cal-converter .pac-cal-button:focus {
    outline: 2px solid transparent;
    box-shadow: 0 0 0 3px rgba(214, 168, 79, 0.3) !important;
}

.pac-cal-converter .pac-cal-button:active {
    transform: translateY(1px);
}

.pac-cal-result-box {
    display: none;
    margin-top: 0.65rem;
    padding: 0.62rem 0.72rem;
    background: var(--pac-cal-result-bg);
    border: 1px solid #cce1d8;
    border-radius: 6px;
}

.pac-cal-result-box:has(.pac-cal-result:not(:empty)) {
    display: block;
}

.pac-cal-result {
    margin: 0;
    color: var(--pac-cal-text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", "Tahoma", sans-serif;
    font-size: 0.96rem;
    font-weight: 700;
    line-height: 1.4;
}

@media (max-width: 640px) {
    .pac-cal-converter {
        padding: 0.8rem;
    }

    .pac-cal-grid {
        grid-template-columns: 1fr;
        gap: 0.58rem;
    }

    .pac-cal-actions {
        justify-content: flex-start;
    }

    .pac-cal-result-box {
        padding: 0.58rem 0.68rem;
    }
}