/* ============================================================
   Rocket Logistic — Transport Price Calculator
   Complete stylesheet (design tokens + all components)
   ============================================================ */

/* ------------------------------------------------------------
   1. Design Tokens
   ------------------------------------------------------------ */
:root {
    --color-primary:        #1E3A5F;
    --color-primary-light:  #2d5a8e;
    --color-primary-dark:   #152a45;
    --color-accent:         #FF6B35;
    --color-accent-hover:   #e55a24;
    --color-brand-green:    #4EA831;
    --color-brand-green-dark: #3D8A26;
    --color-error:          #e74c3c;
    --color-text:           #2c3e50;
    --color-text-light:     #6c757d;
    --color-bg:             #ffffff;
    --color-bg-section:     #f8f9fa;
    --color-white:          #FFFFFF;
    --color-border:         #dee2e6;
    --color-border-focus:   #1E3A5F;

    --font-family:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading:         'Montserrat', sans-serif;
    --font-body:            'Open Sans', sans-serif;
    --font-weight-normal:   400;
    --font-weight-semibold: 600;
    --font-weight-bold:     700;

    --transition:           0.3s ease;

    --space-xs:  0.25rem;   /* 4px  */
    --space-sm:  0.5rem;    /* 8px  */
    --space-md:  1rem;      /* 16px */
    --space-lg:  1.5rem;    /* 24px */
    --space-xl:  2rem;      /* 32px */
    --space-2xl: 3rem;      /* 48px */
    --space-3xl: 4rem;      /* 64px */

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-card:       0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);

    --container-max: 1200px;
    --nav-height: 70px;
    --section-padding: 80px 0;
}

/* ------------------------------------------------------------
   2. Base Reset & Typography
   ------------------------------------------------------------ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    padding-top: var(--nav-height);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-light);
}

/* ------------------------------------------------------------
   3. Container
   ------------------------------------------------------------ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ------------------------------------------------------------
   4. Header & Navigation (matches main website)
   ------------------------------------------------------------ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
}

.nav__logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav__menu {
    display: flex;
    align-items: center;
    margin-left: auto;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav__link {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-primary);
    padding: 0.5rem 0;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-brand-green);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__link:hover {
    color: var(--color-primary);
}

@keyframes heartbeat {
    0% {
        box-shadow: 0 0 0 0 var(--color-brand-green);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 0 7px transparent;
        transform: scale(1.05);
    }
    100% {
        box-shadow: 0 0 0 0 transparent;
        transform: scale(1);
    }
}

.nav__link--calculator {
    background-color: var(--color-brand-green);
    color: var(--color-white) !important;
    padding: 0.5rem 1rem !important;
    border-radius: 4px;
    animation: heartbeat 1.5s ease-in-out infinite;
}

.nav__link--calculator::after {
    display: none;
}

.nav__link--calculator:hover {
    background-color: var(--color-brand-green-dark);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 4px;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.lang-toggle:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ------------------------------------------------------------
   5. Section Base & Titles
   ------------------------------------------------------------ */
.section__title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2xl);
    text-align: center;
    letter-spacing: -0.02em;
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: calc(-1 * var(--space-lg));
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
}

/* ------------------------------------------------------------
   6. Price Calculator — Section Wrapper
   ------------------------------------------------------------ */
.price-calculator {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-section);
}

/* ------------------------------------------------------------
   7. Price Calculator — Two-column Body Grid
   ------------------------------------------------------------ */
.price-calculator__body {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-2xl);
    align-items: start;
}

.price-calculator__form {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
}

.price-calculator__result {
    position: sticky;
    top: calc(64px + var(--space-lg));
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* ------------------------------------------------------------
   8. Calc Groups (visual card sections inside the form)
   ------------------------------------------------------------ */
.calc-group {
    padding: 0;
}

.calc-group__title {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-md);
}

/* ------------------------------------------------------------
   9. Service Tabs (FTL / LTL toggle)
   ------------------------------------------------------------ */
.service-tabs {
    /* no extra spacing — lives inside .calc-group */
}

.service-tabs__options {
    display: flex;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.service-tabs__option {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: var(--font-weight-semibold);
    font-size: 0.95rem;
    color: var(--color-text-light);
    background: white;
    transition: background var(--transition), color var(--transition);
    min-height: 44px;
    user-select: none;
    border: none;
    gap: var(--space-sm);
}

.service-tabs__option + .service-tabs__option {
    border-left: 2px solid var(--color-border);
}

.service-tabs__option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
    width: 0;
    height: 0;
}

.service-tabs__option--active,
.service-tabs__option:has(input:checked) {
    background: var(--color-primary);
    color: white;
}

.service-tabs__option:hover:not(.service-tabs__option--active):not(:has(input:checked)) {
    background: var(--color-bg-section);
    color: var(--color-text);
}

.service-tabs__option:focus-within {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

/* ------------------------------------------------------------
   10. Form Layout
   ------------------------------------------------------------ */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

/* ------------------------------------------------------------
   11. Form Inputs, Selects, Textareas
   ------------------------------------------------------------ */
.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.625rem var(--space-md);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    color: var(--color-text);
    background: white;
    transition: border-color var(--transition), box-shadow var(--transition);
    min-height: 44px;
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236c757d' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
    cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-light);
}

/* Error state */
.form-group input[aria-invalid="true"],
.form-group select[aria-invalid="true"],
.form-group textarea[aria-invalid="true"],
.form-group input.field--error,
.form-group select.field--error {
    border-color: var(--color-error);
}

.form-group input[aria-invalid="true"]:focus,
.form-group select[aria-invalid="true"]:focus,
.form-group textarea[aria-invalid="true"]:focus {
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.form-group input:disabled,
.form-group select:disabled {
    background: #f3f4f6;
    color: #9ca3af;
    cursor: not-allowed;
    border-color: #e5e7eb;
}

.form-error {
    font-size: 0.8rem;
    color: var(--color-error);
    min-height: 1.1em;
    display: block;
    line-height: 1.4;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
    line-height: 1.5;
}

/* Date input */
input[type="date"] {
    padding: 0.625rem var(--space-md);
}

/* ------------------------------------------------------------
   12. Checkbox Group
   ------------------------------------------------------------ */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    min-height: 44px;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    min-height: unset;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
    border-radius: 3px;
}

.checkbox-group label {
    font-size: 0.9rem;
    font-weight: var(--font-weight-normal);
    cursor: pointer;
    line-height: 1.4;
}

/* ------------------------------------------------------------
   13. Radio Group (date flexibility)
   ------------------------------------------------------------ */
.radio-group {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    cursor: pointer;
    min-height: 44px;
    font-size: 0.9rem;
}

.radio-option input[type="radio"] {
    width: 16px;
    height: 16px;
    min-height: unset;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}

/* ------------------------------------------------------------
   14. Pallet type radio options
   ------------------------------------------------------------ */
.pallet-type-options {
    display: flex;
    flex-direction: row;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
    flex-wrap: wrap;
}

/* Hide the native radio input */
.checkbox-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

/* Each option card */
.checkbox-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.3;
    text-align: center;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border, #d1d5db);
    border-radius: 8px;
    background: var(--color-white);
    transition: border-color 0.15s, background 0.15s;
    min-width: 110px;
    max-width: 140px;
    user-select: none;
}

.checkbox-label:hover {
    border-color: var(--color-primary);
}

/* Custom checkbox box */
.checkbox-box {
    width: 22px;
    height: 22px;
    border: 2px solid var(--color-border, #d1d5db);
    border-radius: 5px;
    background: var(--color-white);
    position: relative;
    flex-shrink: 0;
    transition: border-color 0.15s, background 0.15s;
}

/* Checkmark (hidden by default) */
.checkbox-box::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 7px;
    height: 11px;
    border: 2.5px solid #fff;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    opacity: 0;
    transition: opacity 0.1s;
}

/* Checked state: highlight card and box, show tick */
.checkbox-label input:checked ~ .checkbox-box {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox-label input:checked ~ .checkbox-box::after {
    opacity: 1;
}

.checkbox-label:has(input:checked) {
    border-color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 6%, white);
}

/* ------------------------------------------------------------
   15. Buttons
   ------------------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem var(--space-xl);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-weight: var(--font-weight-semibold);
    font-size: 0.95rem;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    border: 2px solid transparent;
    min-height: 44px;
    text-decoration: none;
    line-height: 1;
}

.btn--primary {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.btn--primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.35);
}

.btn--primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: none;
}

.btn--primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn--full {
    width: 100%;
}

/* ------------------------------------------------------------
   16. Estimate Card
   ------------------------------------------------------------ */
.estimate-card {
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    border-top: 4px solid var(--color-border);
    transition: border-color var(--transition), box-shadow var(--transition);
}

/* States */
.estimate-card:not(.estimate-card--empty) {
    border-top-color: var(--color-brand-green);
    box-shadow: var(--shadow-card-hover);
}

.estimate-card--error {
    border-top-color: #f39c12 !important;
    box-shadow: var(--shadow-card) !important;
}

.estimate-card__header {
    padding: var(--space-lg) var(--space-lg) var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.estimate-card__title {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0;
}

.estimate-card__body {
    padding: var(--space-lg);
}

/* Empty state */
.estimate-card__empty-state {
    color: var(--color-text-light);
    font-size: 0.95rem;
    text-align: center;
    padding: var(--space-md) 0;
    line-height: 1.6;
}

/* Price state */
.estimate-card__price {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
    flex-wrap: wrap;
}

.price-main {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.estimate-card__currency {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-light);
}

.estimate-card__eur {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.estimate-card__note {
    font-size: 0.8rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

/* No-rate state */
.estimate-card__norate-state p {
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    font-size: 0.95rem;
}

/* Error state */
.estimate-card__error-state p {
    color: var(--color-text);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ------------------------------------------------------------
   17. CSS Spinner
   ------------------------------------------------------------ */
.calc-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-xl) 0;
}

.calc-spinner__ring {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-brand-green);
    border-radius: 50%;
    animation: calc-spin 0.8s linear infinite;
}

@keyframes calc-spin {
    to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
    .calc-spinner__ring {
        animation: none;
        border-color: var(--color-border);
        border-top-color: var(--color-brand-green);
        border-right-color: var(--color-brand-green);
    }
}

/* ------------------------------------------------------------
   18. Quote Panel
   ------------------------------------------------------------ */
.quote-panel {
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: var(--space-lg);
    border-top: 4px solid var(--color-primary);
}

.quote-panel__title {
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.quote-panel__summary {
    background: var(--color-bg-section);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    border-left: 3px solid var(--color-brand-green);
}

.quote-panel__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-hint {
    font-size: 0.8rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-top: calc(-1 * var(--space-xs));
}

.quote-panel__inline-error {
    font-size: 0.875rem;
    color: var(--color-error);
    padding: var(--space-sm) var(--space-md);
    background: rgba(231, 76, 60, 0.07);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-error);
}

.quote-panel__success {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
}

.quote-panel__success p {
    color: var(--color-brand-green);
    font-weight: var(--font-weight-semibold);
    font-size: 1.05rem;
}

/* ------------------------------------------------------------
   19. Footer (matches main website)
   ------------------------------------------------------------ */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 4rem 0 2rem;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer__logo {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.footer__logo-img {
    height: 80px;
    width: auto;
    object-fit: contain;
}

.footer__tagline {
    opacity: 0.8;
}

.footer__links h4,
.footer__social h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    list-style: none;
}

.footer__links a {
    color: var(--color-white);
    opacity: 0.8;
}

.footer__links a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    transition: var(--transition);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.social-link:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.footer__bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Scroll to Top */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background-color: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.scroll-top svg {
    width: 20px;
    height: 20px;
}

/* ------------------------------------------------------------
   20. Responsive — Tablet ≤ 1024px
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
    .price-calculator__body {
        grid-template-columns: 1fr 320px;
        gap: var(--space-lg);
    }

    .price-calculator__result {
        top: calc(56px + var(--space-md));
    }

    .section__title {
        font-size: 1.75rem;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .footer__brand {
        grid-column: 1 / -1;
    }
}

/* ------------------------------------------------------------
   21. Responsive — Mobile ≤ 768px
   ------------------------------------------------------------ */
@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    .price-calculator__body {
        grid-template-columns: 1fr;
    }

    .price-calculator__result {
        position: static;
    }

    .section__title {
        font-size: 1.5rem;
    }

    .price-main {
        font-size: 1.7rem;
    }

    /* Navigation - mobile menu */
    .nav__menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--nav-height));
        background-color: var(--color-white);
        padding: 2rem;
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .nav__menu.active {
        transform: translateX(0);
    }

    .nav__list {
        flex-direction: column;
        gap: 1.5rem;
    }

    .nav__link {
        font-size: 1.25rem;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    /* Footer */
    .footer__grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer__logo {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
    }
}

/* ------------------------------------------------------------
   22. Responsive — Small Mobile ≤ 480px
   ------------------------------------------------------------ */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .price-calculator {
        padding: var(--space-2xl) 0;
    }

    .estimate-card__body {
        padding: var(--space-md);
    }

    .estimate-card__header {
        padding: var(--space-md) var(--space-md) var(--space-sm);
    }

    .quote-panel {
        padding: var(--space-md);
    }

    .calc-group {
        padding: 0;
    }

    .service-tabs__option {
        font-size: 0.85rem;
        padding: var(--space-md) var(--space-sm);
    }

    .btn {
        font-size: 0.9rem;
        padding: 0.7rem var(--space-lg);
    }

    .section__title {
        font-size: 1.35rem;
        margin-bottom: var(--space-lg);
    }
}

/* ------------------------------------------------------------
   23. Utility Classes
   ------------------------------------------------------------ */
[hidden] {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* State transition helper */
.fade-in {
    animation: fade-in 0.15s ease;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}