/* Tow Capacity Calculator v3 - Smarter Towing */

.tow-calc {
    --tc-purple: #332869;
    --tc-purple-light: #4a3d8f;
    --tc-green: #1b8a2e;
    --tc-green-bg: #e8f5e9;
    --tc-amber: #e68a00;
    --tc-amber-bg: #fff8e1;
    --tc-red: #c62828;
    --tc-red-bg: #ffebee;
    --tc-dark: #1a1a1a;
    --tc-gray: #666;
    --tc-light-gray: #999;
    --tc-border: #ddd;
    --tc-bg: #f7f8f9;
    --tc-white: #fff;
    --tc-radius: 8px;

    max-width: 840px;
    margin: 0 auto;
    padding: 24px 16px;
    font-family: urbane, Montserrat, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--tc-dark);
    line-height: 1.5;
}

.tow-calc *, .tow-calc *::before, .tow-calc *::after {
    box-sizing: border-box;
}

/* Header */
.tow-calc__header {
    text-align: center;
    margin-bottom: 32px;
}

.tow-calc__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--tc-purple);
    margin: 0 0 8px;
}

.tow-calc__subtitle {
    font-size: 1rem;
    color: var(--tc-gray);
    margin: 0;
}

/* Unit Toggle (slide switch) */
.tow-calc__unit-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
}

.tow-calc__unit-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--tc-light-gray);
    transition: color 0.3s;
    user-select: none;
}

.tow-calc__unit-text--active {
    color: var(--tc-purple);
}

.tow-calc__switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.tow-calc__switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.tow-calc__slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--tc-purple);
    border-radius: 28px;
    transition: background 0.3s;
}

.tow-calc__slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: var(--tc-white);
    border-radius: 50%;
    transition: transform 0.3s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.tow-calc__switch input:checked + .tow-calc__slider {
    background: var(--tc-purple-light);
}

.tow-calc__switch input:checked + .tow-calc__slider::before {
    transform: translateX(24px);
}

/* Sections */
.tow-calc__section {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    padding: 24px;
    margin-bottom: 20px;
}

.tow-calc__section--action {
    text-align: center;
}

.tow-calc__section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.tow-calc__section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--tc-purple);
    color: var(--tc-white);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.tow-calc__section-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--tc-dark);
}

/* Grid */
.tow-calc__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.tow-calc__grid--2col {
    grid-template-columns: repeat(2, 1fr);
}

/* Fields */
.tow-calc__field {
    display: flex;
    flex-direction: column;
}

.tow-calc__field--full {
    margin-bottom: 16px;
}

.tow-calc__field--full-row {
    grid-column: 1 / -1;
}

.tow-calc__field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--tc-dark);
    margin-bottom: 4px;
}

.tow-calc__hint {
    font-size: 0.75rem;
    color: var(--tc-light-gray);
    margin-top: 3px;
    line-height: 1.3;
}

/* Inputs & Selects */
.tow-calc__input,
.tow-calc__select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--tc-border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--tc-dark);
    background: var(--tc-white);
    transition: border-color 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

.tow-calc__select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

.tow-calc__input:focus,
.tow-calc__select:focus {
    outline: none;
    border-color: var(--tc-purple);
    box-shadow: 0 0 0 2px rgba(51, 40, 105, 0.15);
}

/* Hide number spinners */
.tow-calc__input::-webkit-outer-spin-button,
.tow-calc__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.tow-calc__input[type=number] {
    -moz-appearance: textfield;
}

/* Disclaimer checkbox */
.tow-calc__disclaimer-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    text-align: left;
    font-size: 0.85rem;
    color: var(--tc-gray);
    margin-bottom: 20px;
    cursor: pointer;
    line-height: 1.4;
}

.tow-calc__checkbox {
    margin-top: 2px;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    accent-color: var(--tc-purple);
}

/* Calculate button */
.tow-calc__btn {
    display: inline-block;
    background: var(--tc-purple);
    color: var(--tc-white);
    padding: 14px 40px;
    border: none;
    border-radius: 6px;
    font-size: 1.05rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s, transform 0.2s;
}

.tow-calc__btn:hover:not(:disabled) {
    background: var(--tc-purple-light);
    transform: translateY(-1px);
}

.tow-calc__btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* Results */
.tow-calc__results {
    margin-top: 24px;
    animation: tc-fade-in 0.4s ease;
}

@keyframes tc-fade-in {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Verdict */
.tow-calc__verdict {
    text-align: center;
    padding: 28px 24px;
    border-radius: var(--tc-radius);
    margin-bottom: 24px;
}

.tow-calc__verdict--green {
    background: var(--tc-green-bg);
    border: 2px solid var(--tc-green);
}

.tow-calc__verdict--amber {
    background: var(--tc-amber-bg);
    border: 2px solid var(--tc-amber);
}

.tow-calc__verdict--red {
    background: var(--tc-red-bg);
    border: 2px solid var(--tc-red);
}

.tow-calc__verdict-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.tow-calc__verdict-text {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.tow-calc__verdict--green .tow-calc__verdict-text { color: var(--tc-green); }
.tow-calc__verdict--amber .tow-calc__verdict-text { color: var(--tc-amber); }
.tow-calc__verdict--red .tow-calc__verdict-text { color: var(--tc-red); }

.tow-calc__verdict-detail {
    font-size: 0.95rem;
    color: var(--tc-gray);
    max-width: 560px;
    margin: 0 auto;
}

/* ── 4 Check Cards ────────────────────────────────────── */
.tow-calc__checks {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.tow-calc__check-card {
    border-radius: var(--tc-radius);
    padding: 20px;
    border: 2px solid var(--tc-border);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.tow-calc__check-card--pass {
    background: var(--tc-green-bg);
    border-color: var(--tc-green);
}

.tow-calc__check-card--fail {
    background: var(--tc-red-bg);
    border-color: var(--tc-red);
}

.tow-calc__check-card--amber {
    background: var(--tc-amber-bg);
    border-color: var(--tc-amber);
}

.tow-calc__check-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tow-calc__check-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
}

.tow-calc__check-name {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--tc-dark);
}

.tow-calc__check-values {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--tc-dark);
}

.tow-calc__check-detail {
    font-size: 0.8rem;
    color: var(--tc-gray);
    line-height: 1.4;
}

/* ── Warnings ─────────────────────────────────────────── */
.tow-calc__warnings {
    margin-bottom: 24px;
}

.tow-calc__warnings:empty {
    display: none;
    margin: 0;
}

.tow-calc__warning-box {
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 10px;
    font-size: 0.88rem;
    line-height: 1.4;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.tow-calc__warning-box:last-child {
    margin-bottom: 0;
}

.tow-calc__warning-box--red {
    background: var(--tc-red-bg);
    border-left: 4px solid var(--tc-red);
    color: var(--tc-red);
}

.tow-calc__warning-box--amber {
    background: var(--tc-amber-bg);
    border-left: 4px solid var(--tc-amber);
    color: #8a5600;
}

.tow-calc__warning-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* ── Extras (additional outputs) ──────────────────────── */
.tow-calc__extras {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    padding: 20px 24px;
    margin-bottom: 24px;
}

.tow-calc__extras:empty {
    display: none;
}

.tow-calc__extras h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 12px;
    color: var(--tc-dark);
}

.tow-calc__extras-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.tow-calc__extra-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tow-calc__extra-label {
    font-size: 0.78rem;
    color: var(--tc-light-gray);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.tow-calc__extra-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--tc-dark);
}

.tow-calc__extra-value--green { color: var(--tc-green); }
.tow-calc__extra-value--amber { color: var(--tc-amber); }
.tow-calc__extra-value--red { color: var(--tc-red); }

.tow-calc__gcm-insight {
    background: var(--tc-amber-bg);
    border-left: 4px solid var(--tc-amber);
    border-radius: 6px;
    padding: 14px 18px;
    margin-top: 12px;
    font-size: 0.85rem;
    color: #8a5600;
    line-height: 1.4;
}

/* Capacity bar */
.tow-calc__capacity {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    padding: 20px 24px;
    margin-bottom: 24px;
}

.tow-calc__capacity h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 12px;
    color: var(--tc-dark);
}

.tow-calc__bar-wrap {
    background: #e9ecef;
    border-radius: 20px;
    height: 36px;
    overflow: hidden;
    position: relative;
}

.tow-calc__bar {
    height: 100%;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    transition: width 0.8s ease;
    width: 0;
}

.tow-calc__bar--green { background: var(--tc-green); }
.tow-calc__bar--amber { background: var(--tc-amber); }
.tow-calc__bar--red { background: var(--tc-red); }

.tow-calc__bar-label {
    color: var(--tc-white);
    font-size: 0.85rem;
    font-weight: 700;
    white-space: nowrap;
}

.tow-calc__bar-legend {
    display: flex;
    gap: 16px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.tow-calc__legend {
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.tow-calc__legend::before {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.tow-calc__legend--green::before { background: var(--tc-green); }
.tow-calc__legend--amber::before { background: var(--tc-amber); }
.tow-calc__legend--red::before { background: var(--tc-red); }

/* CTA */
.tow-calc__cta {
    background: var(--tc-purple);
    color: var(--tc-white);
    border-radius: var(--tc-radius);
    padding: 28px 24px;
    text-align: center;
    margin-bottom: 24px;
}

.tow-calc__cta h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--tc-white);
}

.tow-calc__cta p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin: 0 0 16px;
    line-height: 1.5;
}

.tow-calc__cta-btn {
    display: inline-block;
    background: var(--tc-white);
    color: var(--tc-purple);
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: opacity 0.2s, transform 0.2s;
}

.tow-calc__cta-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    color: var(--tc-purple);
    text-decoration: none;
}

/* Fine print */
.tow-calc__fine-print {
    font-size: 0.78rem;
    color: var(--tc-light-gray);
    line-height: 1.5;
}

.tow-calc__fine-print p {
    margin: 0;
}

.tow-calc__fine-print strong {
    color: var(--tc-gray);
}

/* ── Responsive - Mobile ──────────────────────────────── */
@media (max-width: 600px) {
    .tow-calc {
        padding: 16px 12px;
    }

    .tow-calc__title {
        font-size: 1.35rem;
    }

    .tow-calc__grid,
    .tow-calc__grid--2col {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .tow-calc__checks {
        grid-template-columns: 1fr;
    }

    .tow-calc__extras-grid {
        grid-template-columns: 1fr;
    }

    .tow-calc__section {
        padding: 16px;
    }

    .tow-calc__btn {
        width: 100%;
        padding: 14px 20px;
    }

    .tow-calc__bar-legend {
        flex-direction: column;
        gap: 6px;
    }

    .tow-calc__cta {
        padding: 20px 16px;
    }
}

/* ── Responsive - Tablet ──────────────────────────────── */
@media (min-width: 601px) and (max-width: 768px) {
    .tow-calc__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}