.theme-switch {
    appearance: none;
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-width: 42px;
    min-height: 40px;
    padding: 0.55rem 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
    font: 600 0.78rem/1 'Onest', sans-serif;
    white-space: nowrap;
    cursor: pointer;
    pointer-events: auto;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-switch:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

.theme-switch:focus-visible {
    outline: 3px solid rgba(59, 130, 246, 0.35);
    outline-offset: 3px;
}

.theme-switch-icon {
    display: inline-flex;
    width: 17px;
    height: 17px;
    flex: 0 0 auto;
}

.theme-switch-icon svg {
    display: block;
    width: 100%;
    height: 100%;
}

.theme-switch-sun,
html[data-theme="dark"] .theme-switch-moon {
    display: none;
}

html[data-theme="dark"] .theme-switch-sun {
    display: inline-flex;
}

html[data-theme="light"] .theme-switch {
    border-color: rgba(85, 72, 62, 0.14);
    background: rgba(255, 252, 247, 0.9);
    color: #39454c;
    box-shadow: 0 10px 28px rgba(102, 75, 52, 0.1);
}

html[data-theme="light"] .theme-switch:hover {
    border-color: rgba(227, 30, 36, 0.22);
    background: #ffffff;
    color: #c91e25;
    box-shadow: 0 12px 32px rgba(126, 79, 50, 0.14);
}

/* A lighter graphite dark theme with clearly separated tonal sections. */
html[data-theme="dark"] {
    color-scheme: dark;
    background: #12191e !important;
    --bg-void: #12191e;
    --bg-primary: #171f24;
    --bg-secondary: #202a30;
    --bg-tertiary: #29343a;
    --bg-card: #20282e;
    --bg-card-hover: #2a343a;
    --glass-bg: rgba(29, 38, 44, 0.90);
    --glass-border: rgba(222, 232, 237, 0.17);
    --text-primary: #f4f6f7;
    --text-secondary: rgba(235, 241, 244, 0.76);
    --text-muted: rgba(225, 234, 238, 0.52);
    --accent-red: #e04450;
    --accent-red-dim: rgba(224, 68, 80, 0.16);
    --accent-red-glow: rgba(224, 68, 80, 0.24);
    --accent-blue: #8cb3c5;
    --accent-blue-dim: rgba(140, 179, 197, 0.16);
    --accent-green: #79b7a0;
    --accent-orange: #d3a16a;
    --gradient-accent: linear-gradient(135deg, #e04450 0%, #b52a38 100%);
}

html[data-theme="dark"] body {
    color: var(--text-primary) !important;
    background:
        radial-gradient(circle at 8% 10%, rgba(224, 68, 80, 0.11), transparent 25rem),
        radial-gradient(circle at 92% 22%, rgba(111, 160, 183, 0.16), transparent 31rem),
        radial-gradient(circle at 32% 88%, rgba(79, 139, 119, 0.10), transparent 27rem),
        repeating-linear-gradient(135deg, transparent 0 58px, rgba(227, 237, 241, 0.018) 59px 60px),
        #161d22 !important;
}

html[data-theme="dark"] ::-webkit-scrollbar-track { background: #182126 !important; }
html[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #596970 !important; border: 3px solid #182126; }
html[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: #72838b !important; }

html[data-theme="dark"] .header,
html[data-theme="dark"] .top-bar {
    color: var(--text-primary) !important;
    background: rgba(24, 32, 37, 0.94) !important;
    border-color: rgba(221, 233, 238, 0.16) !important;
    box-shadow: 0 12px 36px rgba(4, 8, 10, 0.24) !important;
    backdrop-filter: blur(18px) saturate(1.15) !important;
}

html[data-theme="dark"] .theme-switch {
    color: #eef3f5;
    background: rgba(48, 61, 68, 0.82);
    border-color: rgba(223, 234, 239, 0.22);
    box-shadow: 0 9px 24px rgba(2, 7, 10, 0.22);
}

html[data-theme="dark"] input,
html[data-theme="dark"] select,
html[data-theme="dark"] textarea,
html[data-theme="dark"] .search-bar,
html[data-theme="dark"] .calc-select,
html[data-theme="dark"] .booking-form-input,
html[data-theme="dark"] .booking-form-select,
html[data-theme="dark"] .catalog-select {
    color: #f0f4f5 !important;
    background-color: rgba(37, 48, 54, 0.88) !important;
    border-color: rgba(220, 232, 237, 0.22) !important;
}

html[data-theme="dark"] input::placeholder,
html[data-theme="dark"] textarea::placeholder { color: rgba(226, 235, 239, 0.48) !important; }

/* Entry page: warm graphite and blue graphite halves. */
html[data-theme="dark"] .split-screen { background: #151d22 !important; }

html[data-theme="dark"] .split-panel:first-child {
    background:
        radial-gradient(circle at 18% 18%, rgba(224, 68, 80, 0.17), transparent 24rem),
        linear-gradient(145deg, #272429 0%, #20272c 100%) !important;
}

html[data-theme="dark"] .split-panel:last-child {
    background:
        radial-gradient(circle at 82% 15%, rgba(117, 165, 187, 0.19), transparent 25rem),
        linear-gradient(215deg, #1d2d35 0%, #20282d 100%) !important;
}

html[data-theme="dark"] .panel-sto::before,
html[data-theme="dark"] .panel-shop::before {
    opacity: 0.56;
    background-image:
        linear-gradient(30deg, transparent 48%, rgba(230, 238, 241, 0.085) 49%, rgba(230, 238, 241, 0.085) 51%, transparent 52%),
        linear-gradient(150deg, transparent 48%, rgba(230, 238, 241, 0.035) 49%, rgba(230, 238, 241, 0.035) 51%, transparent 52%) !important;
    background-size: 54px 92px !important;
}

html[data-theme="dark"] .panel-icon-ring,
html[data-theme="dark"] .panel-shop .panel-icon-ring {
    background: rgba(39, 51, 57, 0.72) !important;
    border-color: rgba(223, 233, 237, 0.27) !important;
    box-shadow: 0 16px 42px rgba(3, 9, 12, 0.22) !important;
}

html[data-theme="dark"] .panel-cta,
html[data-theme="dark"] .panel-sto .panel-cta,
html[data-theme="dark"] .panel-shop .panel-cta {
    color: #f4f7f8 !important;
    background: rgba(54, 68, 75, 0.88) !important;
    border-radius: 999px;
    padding: 0.72rem 1.05rem;
}

/* Service page: every large section gets its own graphite tint and pattern. */
html[data-theme="dark"] .hero-bg-image img,
html[data-theme="dark"] .work-category-image img { filter: saturate(0.92) brightness(1.05) contrast(0.98); }

html[data-theme="dark"] .hero-bg-overlay {
    background: linear-gradient(90deg, rgba(21, 28, 33, 0.82) 0%, rgba(21, 28, 33, 0.58) 45%, rgba(21, 28, 33, 0.18) 100%) !important;
}

html[data-theme="dark"] .hero-promo-code { color: #fff !important; }
html[data-theme="dark"] .hero-promo-text { color: var(--text-secondary) !important; }

html[data-theme="dark"] #services {
    background:
        radial-gradient(circle at 8% 16%, rgba(224, 68, 80, 0.09), transparent 25rem),
        repeating-linear-gradient(135deg, transparent 0 62px, rgba(224, 68, 80, 0.032) 63px 64px),
        #20282e !important;
}

html[data-theme="dark"] #to-calculator {
    background:
        radial-gradient(circle at 92% 18%, rgba(224, 68, 80, 0.13), transparent 26rem),
        radial-gradient(circle, rgba(230, 237, 240, 0.055) 1px, transparent 1.4px),
        #2a2429 !important;
    background-size: auto, 25px 25px, auto !important;
}

html[data-theme="dark"] #ac-calculator {
    background:
        radial-gradient(circle at 88% 18%, rgba(117, 165, 187, 0.14), transparent 27rem),
        repeating-linear-gradient(45deg, transparent 0 48px, rgba(140, 179, 197, 0.035) 49px 50px),
        #1e2b31 !important;
}

html[data-theme="dark"] #contact {
    background:
        radial-gradient(circle at 10% 18%, rgba(121, 183, 160, 0.10), transparent 25rem),
        radial-gradient(circle, rgba(225, 235, 239, 0.045) 1px, transparent 1.3px),
        #242a2e !important;
    background-size: auto, 28px 28px, auto !important;
}

html[data-theme="dark"] .work-category,
html[data-theme="dark"] .calculator-card,
html[data-theme="dark"] .calculator-form,
html[data-theme="dark"] .calculator-result,
html[data-theme="dark"] .contact-form,
html[data-theme="dark"] .contact-info,
html[data-theme="dark"] .map-wrapper,
html[data-theme="dark"] .calc-feature,
html[data-theme="dark"] .booking-modal,
html[data-theme="dark"] .booking-notice {
    color: var(--text-primary) !important;
    background: rgba(37, 47, 53, 0.92) !important;
    border-color: rgba(221, 233, 238, 0.17) !important;
    box-shadow: 0 12px 34px rgba(3, 9, 12, 0.16) !important;
}

html[data-theme="dark"] .work-category:nth-child(3n + 1),
html[data-theme="dark"] .calc-feature:nth-child(3n + 1) { background: #30282c !important; }
html[data-theme="dark"] .work-category:nth-child(3n + 2),
html[data-theme="dark"] .calc-feature:nth-child(3n + 2) { background: #243137 !important; }
html[data-theme="dark"] .work-category:nth-child(3n),
html[data-theme="dark"] .calc-feature:nth-child(3n) { background: #25322f !important; }

html[data-theme="dark"] .contact-wrapper {
    align-items: stretch !important;
    gap: clamp(1.5rem, 3vw, 2.5rem) !important;
}

html[data-theme="dark"] .contact-info {
    min-width: 0;
    height: 100%;
    padding: 2.5rem;
    border: 1px solid rgba(221, 233, 238, 0.17);
    border-radius: 24px;
    background: #2b292d !important;
}

html[data-theme="dark"] .contact-form {
    min-width: 0;
    height: 100%;
    background: #222e34 !important;
}

html[data-theme="dark"] .messenger-btn.telegram {
    color: #fff !important;
    background: #227da5 !important;
    border-color: rgba(130, 205, 236, 0.34) !important;
}

html[data-theme="dark"] .messenger-btn.whatsapp {
    color: #fff !important;
    background: #2d925b !important;
    border-color: rgba(133, 221, 170, 0.34) !important;
}

html[data-theme="dark"] .messenger-btn.max-msg {
    color: #fff !important;
    background: #366fbe !important;
    border-color: rgba(146, 187, 241, 0.34) !important;
}

html[data-theme="dark"] .btn-primary,
html[data-theme="dark"] .work-book-btn,
html[data-theme="dark"] .vin-form-submit,
html[data-theme="dark"] .reg-submit,
html[data-theme="dark"] .search-btn,
html[data-theme="dark"] .calc-cta,
html[data-theme="dark"] .catalog-cart-button,
html[data-theme="dark"] .catalog-more-button {
    color: #fff !important;
    background: var(--gradient-accent) !important;
    border-color: transparent !important;
    box-shadow: 0 10px 28px rgba(224, 68, 80, 0.20) !important;
}

html[data-theme="dark"] .btn-secondary,
html[data-theme="dark"] .work-calc-link,
html[data-theme="dark"] .back-btn,
html[data-theme="dark"] .header-auth-btn,
html[data-theme="dark"] .header-cart-btn,
html[data-theme="dark"] .catalog-detail-button {
    color: #edf3f5 !important;
    background: rgba(55, 69, 76, 0.78) !important;
    border-color: rgba(222, 233, 238, 0.22) !important;
}

/* Parts page: separate the search, catalog, VIN, contact and SEO surfaces. */
html[data-theme="dark"] .search-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(125deg, #29262b 0%, #233139 100%) !important;
    border: 1px solid rgba(223, 233, 238, 0.16) !important;
    border-radius: 24px;
    box-shadow: 0 18px 48px rgba(3, 9, 12, 0.20) !important;
}

html[data-theme="dark"] .search-hero::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: min(34%, 420px);
    pointer-events: none;
    opacity: 0.46;
    background-image:
        radial-gradient(circle, rgba(235, 242, 245, 0.12) 1.2px, transparent 1.4px),
        linear-gradient(45deg, transparent 47%, rgba(224, 68, 80, 0.08) 48%, rgba(224, 68, 80, 0.08) 52%, transparent 53%);
    background-size: 24px 24px, 56px 56px;
    mask-image: linear-gradient(90deg, #000, transparent);
}

html[data-theme="dark"] .search-hero::after {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    top: -98px;
    right: -58px;
    border: 26px solid rgba(224, 68, 80, 0.11);
    border-radius: 50%;
    box-shadow: 0 0 0 25px rgba(140, 179, 197, 0.08), 0 0 0 50px rgba(121, 183, 160, 0.045);
    pointer-events: none;
}

html[data-theme="dark"] .search-hero > * { position: relative; z-index: 1; }

html[data-theme="dark"] .info-notice {
    background: #30272b !important;
    border-color: rgba(224, 68, 80, 0.25) !important;
    border-left-color: var(--accent-red) !important;
}

html[data-theme="dark"] .parts-catalog {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #202e34 0%, #252a2d 100%) !important;
    border-color: rgba(140, 179, 197, 0.22) !important;
    box-shadow: 0 20px 55px rgba(3, 9, 12, 0.22) !important;
}

html[data-theme="dark"] .parts-catalog::before {
    content: "";
    position: absolute;
    inset: 0 0 auto auto;
    width: 350px;
    height: 220px;
    opacity: 0.62;
    pointer-events: none;
    background-image:
        linear-gradient(30deg, transparent 48%, rgba(140, 179, 197, 0.12) 49%, rgba(140, 179, 197, 0.12) 51%, transparent 52%),
        linear-gradient(150deg, transparent 48%, rgba(224, 68, 80, 0.08) 49%, rgba(224, 68, 80, 0.08) 51%, transparent 52%);
    background-size: 34px 58px;
    mask-image: linear-gradient(225deg, #000, transparent 74%);
}

html[data-theme="dark"] .parts-catalog > * { position: relative; z-index: 1; }

html[data-theme="dark"] .catalog-search-context {
    color: var(--text-secondary) !important;
    background: rgba(43, 55, 61, 0.88) !important;
    border-color: rgba(222, 233, 238, 0.16) !important;
}

html[data-theme="dark"] .catalog-card {
    background: #252d32 !important;
    border-color: rgba(223, 233, 238, 0.14) !important;
    box-shadow: 0 10px 30px rgba(2, 7, 10, 0.18) !important;
}

html[data-theme="dark"] .catalog-card:nth-child(3n + 1) { background: #302a2e !important; border-top: 3px solid rgba(224, 68, 80, 0.58) !important; }
html[data-theme="dark"] .catalog-card:nth-child(3n + 2) { background: #25322f !important; border-top: 3px solid rgba(121, 183, 160, 0.54) !important; }
html[data-theme="dark"] .catalog-card:nth-child(3n) { background: #243139 !important; border-top: 3px solid rgba(140, 179, 197, 0.56) !important; }

html[data-theme="dark"] .catalog-card-media {
    border-bottom-color: rgba(225, 235, 239, 0.11) !important;
    background:
        radial-gradient(circle at 22% 24%, rgba(224, 68, 80, 0.10), transparent 29%),
        repeating-linear-gradient(135deg, #273238 0 16px, #2b363c 16px 17px) !important;
}

html[data-theme="dark"] .vin-block {
    background:
        radial-gradient(circle at 92% 18%, rgba(224, 68, 80, 0.13), transparent 23rem),
        #30262b !important;
    border-color: rgba(224, 68, 80, 0.20) !important;
}

html[data-theme="dark"] .contact-block {
    background:
        radial-gradient(circle at 8% 18%, rgba(140, 179, 197, 0.14), transparent 22rem),
        #223139 !important;
    border-color: rgba(140, 179, 197, 0.22) !important;
}

html[data-theme="dark"] .seo-local-section {
    color: var(--text-secondary) !important;
    background:
        radial-gradient(circle, rgba(226, 236, 240, 0.05) 1px, transparent 1.3px),
        linear-gradient(145deg, #2c282b, #232e33) !important;
    background-size: 28px 28px, auto !important;
    border-color: rgba(223, 233, 238, 0.15) !important;
}

html[data-theme="dark"] .seo-benefit-grid article,
html[data-theme="dark"] .seo-faq-grid article {
    background: #293238 !important;
    border-color: rgba(222, 233, 238, 0.14) !important;
}

html[data-theme="dark"] .seo-benefit-grid article:nth-child(4n + 1) { background: #332a2e !important; }
html[data-theme="dark"] .seo-benefit-grid article:nth-child(4n + 2) { background: #263430 !important; }
html[data-theme="dark"] .seo-benefit-grid article:nth-child(4n + 3) { background: #26343b !important; }
html[data-theme="dark"] .seo-benefit-grid article:nth-child(4n) { background: #332f29 !important; }

html[data-theme="dark"] .site-legal-footer {
    color: rgba(226, 235, 239, 0.62) !important;
    background: #1c252a !important;
    border-color: rgba(222, 233, 238, 0.12) !important;
}

html[data-theme="dark"] .footer {
    background: #182126 !important;
    border-color: rgba(222, 233, 238, 0.13) !important;
}

/* Extra lightweight geometry for the light theme. */
html[data-theme="light"] .search-hero::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: min(30%, 360px);
    pointer-events: none;
    opacity: 0.52;
    background-image:
        radial-gradient(circle, rgba(85, 120, 141, 0.17) 1.2px, transparent 1.4px),
        linear-gradient(45deg, transparent 47%, rgba(201, 38, 53, 0.055) 48%, rgba(201, 38, 53, 0.055) 52%, transparent 53%);
    background-size: 24px 24px, 58px 58px;
    mask-image: linear-gradient(90deg, #000, transparent);
}

html[data-theme="light"] #services {
    background:
        radial-gradient(circle at 7% 16%, rgba(201, 38, 53, 0.07), transparent 24rem),
        repeating-linear-gradient(135deg, transparent 0 63px, rgba(201, 38, 53, 0.025) 64px 65px),
        rgba(255, 253, 249, 0.86) !important;
}

html[data-theme="light"] #contact {
    background:
        radial-gradient(circle at 91% 14%, rgba(85, 120, 141, 0.09), transparent 25rem),
        radial-gradient(circle, rgba(65, 78, 87, 0.06) 1px, transparent 1.3px),
        rgba(255, 253, 249, 0.86) !important;
    background-size: auto, 28px 28px, auto !important;
}

html[data-theme="light"] .vin-block,
html[data-theme="light"] .contact-block {
    position: relative;
    overflow: hidden;
}

html[data-theme="light"] .vin-block::before,
html[data-theme="light"] .contact-block::before {
    content: "";
    position: absolute;
    inset: auto -35px -45px auto;
    width: 190px;
    height: 150px;
    pointer-events: none;
    opacity: 0.50;
    background-image:
        linear-gradient(30deg, transparent 48%, rgba(201, 38, 53, 0.11) 49%, rgba(201, 38, 53, 0.11) 51%, transparent 52%),
        linear-gradient(150deg, transparent 48%, rgba(85, 120, 141, 0.10) 49%, rgba(85, 120, 141, 0.10) 51%, transparent 52%);
    background-size: 34px 58px;
    mask-image: linear-gradient(315deg, #000, transparent 78%);
}

html[data-theme="light"] .vin-block > *,
html[data-theme="light"] .contact-block > * { position: relative; z-index: 1; }

/* Service slider layout is shared by both themes. */
.hero-slider {
    min-height: max(100svh, 680px) !important;
}

.hero-slide .hero-content-overlay {
    min-height: max(100svh, 680px) !important;
    grid-template-columns: minmax(0, 720px) 1fr !important;
    gap: clamp(2rem, 5vw, 5rem) !important;
    padding: clamp(5rem, 10vh, 6rem) clamp(3rem, 5vw, 4.5rem) clamp(4.75rem, 9vh, 5.5rem) !important;
}

.hero-content-overlay .hero-text {
    width: 100%;
    max-width: 720px !important;
}

.hero-content-overlay .hero-badge {
    margin-bottom: 1rem;
}

.hero-content-overlay .hero-title {
    max-width: 720px;
    margin-bottom: 1rem;
    font-size: clamp(2.4rem, 4vw, 3.5rem) !important;
    line-height: 1.08 !important;
}

.hero-content-overlay .hero-subtitle {
    max-width: 660px;
    margin-bottom: 1.25rem;
    font-size: clamp(1rem, 1.25vw, 1.12rem);
    line-height: 1.55;
}

.hero-content-overlay .hero-promo {
    margin: 0.65rem 0 1rem;
}

.top-bar .theme-switch {
    position: absolute;
    top: 50%;
    right: clamp(1rem, 3vw, 2.5rem);
    transform: translateY(-50%);
}

.top-bar .theme-switch:hover {
    transform: translateY(calc(-50% - 1px));
}

@media (max-width: 1100px) {
    .header .theme-switch-label {
        display: none;
    }

    .header .theme-switch {
        width: 38px;
        min-width: 38px;
        min-height: 38px;
        padding: 0;
    }
}

@media (max-width: 680px) {
    .top-bar .theme-switch {
        right: 0.75rem;
        width: 38px;
        min-width: 38px;
        min-height: 38px;
        padding: 0;
    }

    .top-bar .theme-switch-label {
        display: none;
    }

    .header-right .theme-switch,
    .header-cta .theme-switch {
        width: 36px;
        min-width: 36px;
        min-height: 36px;
    }
}

@media (max-width: 768px) {
    .hero-slider,
    .hero-slide .hero-content-overlay {
        min-height: max(100svh, 720px) !important;
    }

    .hero-slide .hero-content-overlay {
        grid-template-columns: 1fr !important;
        padding: 5.25rem 1.25rem 4.75rem !important;
    }

    .hero-content-overlay .hero-title {
        font-size: clamp(1.8rem, 8.2vw, 2.45rem) !important;
    }

    html[data-theme="dark"] .contact-info,
    html[data-theme="dark"] .contact-form {
        height: auto;
        padding: 1.5rem;
        border-radius: 18px;
    }
}