:root {
    --color-primary: #1B1B1B;
    --color-secondary: #4A4A4A;
    --color-accent: #2B6CB0;
    --color-accent-hover: #1E4F85;
    --color-neutral-light: #F7F7F7;
    --color-neutral-border: #E0E0E0;
    --color-bg: #FFFFFF;
    --color-text: #1B1B1B;
    --color-text-muted: #6B6B6B;

    --font-heading: 'Montserrat', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

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

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);

    --header-height: 72px;
    --max-width: 1140px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover { color: var(--color-accent-hover); }

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-sm);
    z-index: 1000;
    font-weight: 500;
}

.skip-link:focus {
    top: var(--space-xs);
    color: #fff;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-neutral-border);
    height: var(--header-height);
    transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--space-sm);
}

.logo-link {
    flex-shrink: 0;
}

.logo {
    height: 44px;
    width: auto;
}

.main-nav .nav-list {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--space-md);
}

.main-nav a:not(.btn) {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text);
    padding: var(--space-xs) 0;
    position: relative;
    transition: color 0.2s ease;
}

.main-nav a:not(.btn):hover,
.main-nav a:not(.btn):focus-visible {
    color: var(--color-accent);
}

.main-nav a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.main-nav a:not(.btn):hover::after {
    width: 100%;
}

.header-phone {
    display: none;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text);
    white-space: nowrap;
}

.header-phone:hover { color: var(--color-accent); }

.header-phones {
    display: none;
    flex-direction: column;
    gap: 2px;
    flex-shrink: 0;
}

.header-phone-mobile { font-size: 0.875rem; }

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 110;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.menu-open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.menu-open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.menu-open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 767px) {
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 99;
        overflow-y: auto;
    }

    .main-nav.is-open {
        transform: translateX(0);
    }

    .main-nav .nav-list {
        flex-direction: column;
        padding: var(--space-lg) var(--space-sm);
        gap: 0;
    }

    .main-nav .nav-list li {
        width: 100%;
        border-bottom: 1px solid var(--color-neutral-border);
    }

    .main-nav a {
        display: block;
        padding: var(--space-sm) 0;
        font-size: 1.125rem;
    }

    .main-nav a:not(.btn)::after { display: none; }

    .btn-nav {
        margin-top: var(--space-sm);
        text-align: center;
    }
}

.hero {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('assets/images/Dusche-Emmerich-Fliesenecke.jpeg');
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(27,27,27,0.78) 0%, rgba(27,27,27,0.5) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: var(--space-2xl) 0;
    max-width: 680px;
}

h1 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.75rem, 4vw + 0.5rem, 3rem);
    line-height: 1.2;
    color: #fff;
    margin-bottom: var(--space-sm);
}

.hero-sub {
    font-size: 1.125rem;
    line-height: 1.6;
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--space-lg);
}

.btn {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-synthesis: none;
    font-size: 0.9375rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    text-align: center;
    transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
    line-height: 1.4;
    box-shadow: none;
    text-shadow: none;
}

.btn:hover,
.btn:focus,
.btn:focus-visible,
.btn:active {
    box-shadow: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background: var(--color-accent-hover);
    color: #fff;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.0625rem;
}

.btn-nav {
    background: var(--color-accent);
    color: #fff !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
}

.btn-nav:hover {
    background: var(--color-accent-hover);
    color: #fff !important;
}

.btn-submit {
    width: 100%;
}

.section {
    padding: var(--space-xl) 0;
}

.section-alt {
    background: var(--color-neutral-light);
}

.section-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--space-xs);
}

.section-intro {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 0 auto var(--space-lg);
    font-size: 1.0625rem;
    line-height: 1.7;
}

.section-cta {
    text-align: center;
    margin-top: var(--space-lg);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
}

.service-card {
    background: var(--color-bg);
    border: 1px solid var(--color-neutral-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: box-shadow 0.3s ease, transform 0.2s ease;
}

.service-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-neutral-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    color: var(--color-accent);
}

.service-card h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.0625rem;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.about-image img {
    border-radius: var(--radius-lg);
    width: 100%;
    object-fit: contain;
    aspect-ratio: 1 / 1;
}

.about-text h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.about-text p {
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.check-list {
    list-style: none;
    margin-bottom: var(--space-md);
}

.check-list li {
    position: relative;
    padding-left: 1.75rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
    line-height: 1.6;
}

.check-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.35em;
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: 12px;
    background-repeat: no-repeat;
    background-position: center;
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    counter-reset: step;
}

.step-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    position: relative;
    border: 1px solid var(--color-neutral-border);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-accent);
    color: #fff;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    border-radius: 50%;
    margin-bottom: var(--space-sm);
}

.step-card h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.step-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
}

.gallery-item {
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-neutral-border);
}

.gallery-item img {
    width: 100%;
    aspect-ratio: 3 / 2;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover img {
    transform: scale(1.03);
}

.gallery-item figcaption {
    padding: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-align: center;
    background: var(--color-bg);
}

.gallery-trigger {
    display: block;
    width: 100%;
    padding: 0;
    margin: 0;
    border: none;
    background: none;
    cursor: zoom-in;
    box-shadow: none;
    line-height: 0;
}
.gallery-trigger:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.85);
}
.lightbox[hidden] { display: none; }
body.lightbox-open { overflow: hidden; }

.lightbox-figure {
    margin: 0;
    max-width: min(1000px, 92vw);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.lightbox-img {
    max-width: 100%;
    max-height: 82vh;
    width: auto;
    height: auto;
    border-radius: var(--radius-lg);
    background: #fff;
}
.lightbox-caption {
    color: #fff;
    text-align: center;
    margin-top: var(--space-sm);
    font-size: 0.95rem;
}
.lightbox-close,
.lightbox-nav {
    position: absolute;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}
.lightbox-close:hover,
.lightbox-nav:hover { background: rgba(255, 255, 255, 0.3); }
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
.lightbox-close { top: 20px; right: 20px; font-size: 2.4rem; }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }
@media (max-width: 600px) {
    .lightbox-close { top: 10px; right: 10px; }
    .lightbox-prev { left: 8px; }
    .lightbox-next { right: 8px; }
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

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

.form-honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    overflow: hidden;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-group label {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-primary);
}

.form-group label span {
    color: var(--color-accent);
}

.form-group input,
.form-group textarea {
    font-family: var(--font-body);
    font-size: 1rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-neutral-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

.form-group input:focus-visible,
.form-group textarea:focus-visible {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(43,108,176,0.4);
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.form-privacy-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-top: var(--space-xs);
}

.form-privacy-note a {
    color: var(--color-accent);
    text-decoration: underline;
}

.form-message {
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.form-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.form-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.contact-info {
    background: var(--color-bg);
    border: 1px solid var(--color-neutral-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.contact-info address {
    font-style: normal;
    line-height: 1.7;
}

.contact-info p {
    margin-bottom: var(--space-sm);
}

.contact-info a {
    color: var(--color-accent);
    font-weight: 500;
}

.contact-info svg {
    vertical-align: middle;
    margin-right: 4px;
    color: var(--color-accent);
}

.site-footer {
    background: var(--color-primary);
    color: rgba(255,255,255,0.7);
    padding: var(--space-lg) 0;
    font-size: 0.875rem;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
}

.footer-contact a {
    color: rgba(255,255,255,0.85);
}

.footer-contact a:hover { color: #fff; }

.footer-legal {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

.footer-legal a {
    color: rgba(255,255,255,0.7);
    font-weight: 500;
}

.footer-legal a:hover { color: #fff; }

.footer-copy {
    color: rgba(255,255,255,0.5);
}

.footer-credit a {
    color: rgba(255,255,255,0.5);
}

.footer-credit a:hover { color: rgba(255,255,255,0.8); }

.legal-page {
    padding-top: var(--space-xl);
}

.legal-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.legal-content {
    max-width: 780px;
}

.legal-content h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.375rem;
    color: var(--color-primary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.legal-content h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-top: var(--space-md);
    margin-bottom: var(--space-xs);
}

.legal-content p {
    margin-bottom: var(--space-sm);
    line-height: 1.7;
    color: var(--color-secondary);
}

.legal-content ul {
    margin: 0 0 var(--space-sm) var(--space-md);
    color: var(--color-secondary);
    line-height: 1.7;
}

.legal-content li {
    margin-bottom: var(--space-xs);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (min-width: 768px) {
    .container { padding: 0 var(--space-md); }

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

    .nav-toggle { display: none; }

    .main-nav {
        position: static;
        transform: none;
        background: none;
    }

    .header-phone { display: flex; }
    .header-phones { display: flex; }

    .hero { min-height: 70vh; }

    .hero-content { padding: var(--space-2xl) 0; }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .about-grid { grid-template-columns: 1fr 1fr; }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .contact-grid { grid-template-columns: 1.3fr 0.7fr; }

    .btn-submit { width: auto; }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero { min-height: 75vh; }
}