/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Color Palette - Warm, natural tones */
    --color-primary: #8B5A2B; /* Warm brown */
    --color-primary-dark: #6B4423;
    --color-primary-light: #A67C52;
    --color-accent: #C87941; /* Warm amber */
    --color-accent-light: #E89A65;
    
    --color-bg: #FEFDFB;
    --color-bg-secondary: #F5F1ED;
    --color-bg-tertiary: #EBE4DC;
    
    --color-text: #2C2416;
    --color-text-light: #5A4E3F;
    --color-text-muted: #8B7E6F;
    
    --color-border: #D4C9BC;
    --color-shadow: rgba(44, 36, 22, 0.1);
    
    --color-success: #4A7C59;
    --color-warning: #D4A574;
    --color-error: #B85450;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --font-size-base: 18px;
    --font-size-small: 16px;
    --font-size-large: 20px;
    --font-size-h1: 48px;
    --font-size-h2: 36px;
    --font-size-h3: 24px;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 64px;
    --spacing-2xl: 96px;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 8px;
    --border-radius-large: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-md) 0;
    line-height: var(--line-height-heading);
    font-weight: 700;
    color: var(--color-primary-dark);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

p {
    margin: 0 0 var(--spacing-md) 0;
}

p:last-child {
    margin-bottom: 0;
}

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

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

a:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

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

address {
    font-style: normal;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Header & Navigation
   ============================================ */
#header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(44, 36, 22, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    min-height: 60px;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: var(--border-radius);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-md);
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-weight: 500;
    font-size: 16px;
    color: var(--color-text);
    transition: all var(--transition-fast);
    border-radius: var(--border-radius);
    min-height: 40px;
    display: flex;
    align-items: center;
}

.nav-menu a:hover {
    color: var(--color-accent);
    background-color: var(--color-bg-secondary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    min-width: 44px;
    min-height: 44px;
    position: relative;
}

.menu-toggle:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--border-radius);
}

.hamburger {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--color-primary);
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 28px;
    height: 3px;
    background-color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.menu-toggle[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    min-height: 48px;
    line-height: 1.4;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-light);
    border-color: var(--color-accent-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.btn-primary:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    padding: var(--spacing-xl) 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-text h1 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.tagline {
    font-size: var(--font-size-large);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.subtitle {
    font-size: var(--font-size-h3);
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

.hero-image {
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: 0 8px 24px var(--color-shadow);
}

/* ============================================
   Sections
   ============================================ */
section {
    padding: var(--spacing-xl) 0;
}

section:nth-child(even) {
    background-color: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-text-light);
    max-width: 800px;
    margin: 0 auto;
}

.lead {
    font-size: var(--font-size-large);
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Verfahren Section
   ============================================ */
.verfahren {
    background-color: var(--color-bg);
}

.content-box {
    max-width: 900px;
    margin: 0 auto;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.info-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
}

.info-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.notice {
    background-color: var(--color-warning);
    color: var(--color-text);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--color-accent);
}

.notice h3 {
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-sm);
}

.additional-info {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-lg);
}

.additional-info h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Leistungen Section
   ============================================ */
.leistungen {
    background-color: var(--color-bg-secondary);
}

.services-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.service-card {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    background-color: var(--color-bg);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: 0 4px 16px var(--color-shadow);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--color-shadow);
}

.service-card:nth-child(even) {
    grid-template-columns: 1.5fr 1fr;
}

.service-card:nth-child(even) .service-image {
    order: 2;
}

.service-image {
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.service-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.service-content h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

/* ============================================
   Vorher/Nachher Section
   ============================================ */
.vorher-nachher {
    background-color: var(--color-bg);
    text-align: center;
}

.image-comparison-slider {
    max-width: 800px;
    margin: var(--spacing-xl) auto 0;
    position: relative;
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: 0 8px 32px var(--color-shadow);
    user-select: none;
    touch-action: none;
}

.comparison-images {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    background-color: var(--color-bg-tertiary);
}

.img-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.img-wrapper img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.before-wrapper {
    clip-path: inset(0 50% 0 0);
    transition: clip-path 0.05s ease-out;
}

.slider-control {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    cursor: ew-resize;
    z-index: 10;
}

.slider-line {
    width: 100%;
    height: 100%;
    background-color: white;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.slider-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: transparent;
    border: none;
    cursor: ew-resize;
    padding: 0;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.slider-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.slider-button:active {
    transform: translate(-50%, -50%) scale(0.95);
}

.slider-button svg {
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.comparison-labels {
    position: absolute;
    top: var(--spacing-md);
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    z-index: 5;
    pointer-events: none;
}

.comparison-labels span {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: var(--font-size-small);
    box-shadow: 0 2px 8px var(--color-shadow);
}

@media (max-width: 768px) {
    .comparison-labels {
        padding: 0 var(--spacing-xs);
    }
    
    .comparison-labels span {
        font-size: 14px;
        padding: 6px var(--spacing-sm);
    }
}

/* ============================================
   Ablauf Section
   ============================================ */
.ablauf {
    background-color: var(--color-bg-secondary);
    text-align: center;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.process-step {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-large);
    box-shadow: 0 4px 16px var(--color-shadow);
    transition: transform var(--transition-fast);
}

.process-step:hover {
    transform: translateY(-4px);
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.process-step h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
    background-color: var(--color-bg);
}

.faq-list {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.faq-item {
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-large);
    font-weight: 600;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-fast);
    min-height: 60px;
}

.faq-question:hover {
    background-color: var(--color-bg-tertiary);
}

.faq-question:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: -3px;
}

.faq-icon {
    font-size: 32px;
    font-weight: 300;
    color: var(--color-accent);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--spacing-md);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-medium);
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-light);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

/* ============================================
   Kontakt Section
   ============================================ */
.kontakt {
    background-color: var(--color-bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.contact-info h3,
.opening-hours h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-info address {
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.contact-info address p {
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    margin-bottom: var(--spacing-md);
}

.contact-details a {
    color: var(--color-accent);
    font-weight: 600;
}

.contact-details a:hover {
    color: var(--color-primary);
}

.hours-table {
    width: 100%;
    border-collapse: collapse;
}

.hours-table td {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.hours-table tr:last-child td {
    border-bottom: none;
}

.hours-table td:first-child {
    padding-right: var(--spacing-md);
}

/* ============================================
   Footer
   ============================================ */
#footer {
    background-color: var(--color-primary-dark);
    color: var(--color-bg);
    padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 60px;
    width: auto;
}

#footer h3 {
    color: var(--color-bg);
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-sm);
}

#footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#footer ul li {
    margin-bottom: var(--spacing-xs);
}

#footer a {
    color: var(--color-bg-tertiary);
    transition: color var(--transition-fast);
}

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

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: 44px;
}

.social-link svg {
    fill: currentColor;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-bg-tertiary);
}

/* ============================================
   Responsive Design - Mobile First
   ============================================ */

/* Tablets and below */
@media (max-width: 900px) {
    :root {
        --font-size-h1: 36px;
        --font-size-h2: 28px;
        --font-size-h3: 22px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .hero-image {
        order: -1;
    }

    .service-card {
        grid-template-columns: 1fr;
    }

    .service-card:nth-child(even) {
        grid-template-columns: 1fr;
    }

    .service-card:nth-child(even) .service-image {
        order: 0;
    }

    .comparison-container {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --font-size-base: 16px;
        --font-size-h1: 32px;
        --font-size-h2: 24px;
        --font-size-h3: 20px;
        --spacing-lg: 32px;
        --spacing-xl: 48px;
        --spacing-2xl: 64px;
    }

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 2px 8px rgba(44, 36, 22, 0.08);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-medium);
    }

    #main-nav.active {
        max-height: 500px;
    }

    .nav-menu {
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
    }

    .nav-menu li {
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        padding: var(--spacing-md);
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-logo {
        display: flex;
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    #header,
    #footer,
    .menu-toggle,
    .btn {
        display: none;
    }

    body {
        font-size: 12pt;
        color: black;
        background: white;
    }

    section {
        page-break-inside: avoid;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}

/* ============================================
   Accessibility & Focus States
   ============================================ */

/* Skip to content link for screen readers */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm);
    z-index: 1000;
}

.skip-to-content:focus {
    top: 0;
}

/* Ensure sufficient contrast for all text */
@media (prefers-contrast: high) {
    :root {
        --color-text: #000000;
        --color-primary: #5A3A1A;
    }
}

/* Respect reduced motion preferences */
@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;
    }
}

/* ============================================
   Legal Pages (Impressum, Datenschutz)
   ============================================ */
.legal-page {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
}

.legal-page .container {
    max-width: 900px;
}

.legal-page h1 {
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary-dark);
}

.legal-page h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-border);
    color: var(--color-primary);
}

.legal-page h2:first-of-type {
    border-top: none;
    margin-top: var(--spacing-lg);
}

.legal-page h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.legal-page h4 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.legal-page ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.legal-page li {
    margin-bottom: var(--spacing-sm);
}

.legal-page p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-base);
}

.legal-page a {
    color: var(--color-primary);
    text-decoration: underline;
}

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

.legal-page .last-updated {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    font-style: italic;
    color: var(--color-text-muted);
}