/* ============================================
   HOLZ & STEIN BAU GMBH - CASE STUDY STYLESHEET
   Robust, grounded construction company design
   Color palette: Sand Beige (#d7c8b1), Dark Gray (#333333), Brick Red (#b64926)
============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES
============================================ */
:root {
    /* Color Palette */
    --color-sand-beige: #d7c8b1;
    --color-sand-beige-light: #e8ddc9;
    --color-sand-beige-dark: #c4b49e;
    --color-dark-gray: #333333;
    --color-dark-gray-light: #4a4a4a;
    --color-brick-red: #b64926;
    --color-brick-red-dark: #9a3d1f;
    --color-brick-red-light: #c95d34;

    /* Neutrals */
    --color-white: #ffffff;
    --color-off-white: #f9f7f4;
    --color-light-gray: #e5e5e5;
    --color-medium-gray: #888888;

    /* Typography */
    --font-heading: 'Roboto Slab', serif;
    --font-body: 'Open Sans', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;

    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 4px;
    --border-radius-lg: 8px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ============================================
   RESET & BASE STYLES
============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-dark-gray);
    background-color: var(--color-off-white);
    overflow-x: hidden;
}

body.loaded {
    opacity: 1;
}

/* ============================================
   TYPOGRAPHY
============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--color-brick-red-dark);
}

strong {
    font-weight: 700;
    color: var(--color-dark-gray);
}

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

/* Fade-in Animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in.delay-1 {
    transition-delay: 0.1s;
}

.fade-in.delay-2 {
    transition-delay: 0.2s;
}

.fade-in.delay-3 {
    transition-delay: 0.3s;
}

.fade-in.delay-4 {
    transition-delay: 0.4s;
}

.fade-in.delay-5 {
    transition-delay: 0.5s;
}

/* Section Labels */
.section-label {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-brick-red);
    margin-bottom: var(--spacing-sm);
}

.section-label.light {
    color: var(--color-sand-beige);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-sm);
}

.section-title.light {
    color: var(--color-white);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-medium-gray);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================
   BUTTONS
============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--color-brick-red-dark);
    border-color: var(--color-brick-red-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--color-dark-gray);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-dark-gray);
    border-color: var(--color-white);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ============================================
   HEADER / NAVIGATION
============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-image {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark-gray);
    line-height: 1;
}

.header.scrolled .logo-text {
    color: var(--color-dark-gray);
}

.logo-subtext {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-brick-red);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger-line {
    width: 28px;
    height: 3px;
    background-color: var(--color-dark-gray);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark-gray);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-brick-red);
    background-color: rgba(182, 73, 38, 0.1);
}

.nav-link-cta {
    background-color: var(--color-brick-red);
    color: var(--color-white);
}

.nav-link-cta:hover {
    background-color: var(--color-brick-red-dark);
    color: var(--color-white);
}

/* ============================================
   HERO SECTION
============================================ */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-sand-beige-dark) 0%, var(--color-dark-gray-light) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* wichtig: echtes Hero-Background-Verhalten */
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    z-index: 1;
}


.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(51, 51, 51, 0.75) 0%, rgba(182, 73, 38, 0.55) 100%);
    z-index: 2;
}

/* Hero Content */
.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.hero-title-muted {
    color: rgba(255, 255, 255, 0.7);
    font-weight: 400;
}

.hero-title-highlight {
    color: var(--color-white);
    font-weight: 700;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-sand-beige-light);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Hero Badge */
.hero-badge {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 3;
    background-color: var(--color-brick-red);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.badge-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.badge-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1;
}

.badge-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-sand-beige);
    text-transform: uppercase;
    line-height: 1.3;
}

/* ============================================
   SERVICES SECTION
============================================ */
.services-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
}

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

.service-card {
    display: flex;
    flex-direction: column;
    background-color: var(--color-off-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-light-gray);
    transition: all var(--transition-normal);
}

.service-card:hover {
    border-color: var(--color-brick-red);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-brick-red);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-sm);
    min-height: 3.6rem;
}

.service-description {
    font-size: 1rem;
    color: var(--color-dark-gray-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    min-height: 5.1rem;
}

.service-features {
    list-style: none;
    padding: 0;
    margin-top: auto;
}

.service-features li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-medium-gray);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--color-brick-red);
    border-radius: 50%;
}

/* ============================================
   ABOUT SECTION
============================================ */
.about-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-off-white);
}

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

/* About Image */
.about-image-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 5;
    overflow: hidden;
}

.about-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-image-placeholder {
    width: 100%;
    aspect-ratio: 4 / 5;
    background: linear-gradient(135deg, var(--color-sand-beige) 0%, var(--color-dark-gray-light) 100%);
    background-image:
        linear-gradient(45deg, rgba(51, 51, 51, 0.1) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(51, 51, 51, 0.1) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(51, 51, 51, 0.1) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(51, 51, 51, 0.1) 75%);
    background-size: 40px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background-color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.badge-year {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-brick-red);
}

/* About Content */
.about-content {
    padding: var(--spacing-md);
}

.about-quote {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-md);
    border-left: 4px solid var(--color-brick-red);
}

.quote-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark-gray);
    font-style: italic;
    line-height: 1.4;
}

.about-text {
    font-size: 1.0625rem;
    color: var(--color-dark-gray-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

/* Values List */
.values-list {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-fast);
}

.value-item:hover {
    border-color: var(--color-brick-red);
    transform: translateX(4px);
}

.value-icon-wrapper {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-sand-beige-light);
    border-radius: var(--border-radius);
    color: var(--color-brick-red);
}

.value-content {
    flex: 1;
}

.value-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-dark-gray);
    margin-bottom: 0.25rem;
}

.value-description {
    font-size: 0.9375rem;
    color: var(--color-medium-gray);
    margin: 0;
}

/* ============================================
   PORTFOLIO / PROJECTS SECTION
============================================ */
.portfolio-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
}

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

.portfolio-item {
    background-color: var(--color-off-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.portfolio-image {
    width: 100%;
    height: 100%;
    object-fit: cover;   /* füllt den Bereich, ohne verzerren, aber ohne über die Karte zu laufen */
    display: block;
}


.portfolio-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;   /* statt 4 / 3 */
    overflow: hidden;
}

.portfolio-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-dark-gray) 0%, var(--color-dark-gray-light) 100%);
    background-image:
        linear-gradient(30deg, rgba(215, 200, 177, 0.1) 12%, transparent 12.5%, transparent 87%, rgba(215, 200, 177, 0.1) 87.5%, rgba(215, 200, 177, 0.1)),
        linear-gradient(150deg, rgba(215, 200, 177, 0.1) 12%, transparent 12.5%, transparent 87%, rgba(215, 200, 177, 0.1) 87.5%, rgba(215, 200, 177, 0.1));
    background-size: 60px 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-text {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-sand-beige);
    text-align: center;
    padding: var(--spacing-sm);
}

.portfolio-content {
    padding: var(--spacing-md);
}

.portfolio-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-xs);
}

.portfolio-description {
    font-size: 1rem;
    color: var(--color-dark-gray-light);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.portfolio-category {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-brick-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   CONTACT SECTION
============================================ */
.contact-section {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-dark-gray) 0%, var(--color-dark-gray-light) 100%);
    color: var(--color-white);
}

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

/* Contact Info */
.contact-info {
    padding-right: var(--spacing-md);
}

.contact-intro {
    font-size: 1.125rem;
    color: var(--color-sand-beige-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-brick-red);
    border-radius: var(--border-radius);
    color: var(--color-white);
}

.contact-text {
    flex: 1;
}

.contact-label {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-sand-beige);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-size: 1.0625rem;
    color: var(--color-white);
    margin: 0;
}

.contact-hours {
    font-size: 0.875rem;
    color: var(--color-sand-beige-light);
}

/* Contact CTA / Map */
.contact-cta {
    background-color: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(215, 200, 177, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.map-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--color-sand-beige);
}

.map-placeholder svg {
    margin-bottom: var(--spacing-sm);
}

.map-text {
    font-size: 1rem;
    color: var(--color-sand-beige-light);
    margin: 0;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
}

.cta-buttons .btn {
    width: 100%;
}

/* ============================================
   FOOTER
============================================ */
.footer {
    background-color: var(--color-dark-gray);
    color: var(--color-light-gray);
    padding: var(--spacing-xl) 0 var(--spacing-md) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Footer Brand */
.footer-brand {
    padding-right: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-logo-image {
    height: 48px;
    width: auto;
    object-fit: contain;
    background-color: var(--color-white);
    border-radius: 50%;
    padding: 8px;
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer-logo .logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
}

.footer-logo .logo-subtext {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-sand-beige);
}

.footer-tagline {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-sand-beige);
    margin-bottom: var(--spacing-xs);
}

.footer-text {
    font-size: 0.9375rem;
    color: var(--color-light-gray);
    line-height: 1.6;
}

/* Footer Links */
.footer-links {
    display: contents;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.footer-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-link {
    font-size: 0.9375rem;
    color: var(--color-light-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-sand-beige);
}

/* Footer Social */
.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--color-white);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--color-brick-red);
    transform: translateY(-2px);
}

/* Footer Bottom */
.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
    margin-bottom: 0.5rem;
}

.footer-credit {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
}

.footer-credit-link {
    color: var(--color-brick-red);
    text-decoration: none;
    font-weight: 600;
}

.footer-credit-link:hover {
    color: var(--color-brick-red-light);
}

/* ============================================
   RESPONSIVE DESIGN
============================================ */

/* Tablet (max-width: 992px) */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

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

    .footer-brand {
        grid-column: 1 / -1;
    }

    .hero-badge {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        padding: 1rem;
    }

    .badge-number {
        font-size: 2rem;
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--color-white);
        flex-direction: column;
        align-items: flex-start;
        padding: calc(var(--spacing-xl) + 60px) var(--spacing-md) var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-normal);
        gap: var(--spacing-sm);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: var(--spacing-sm);
    }

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

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

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

    .hero-cta {
        flex-direction: column;
    }

    .hero-badge {
        position: static;
        margin-top: var(--spacing-lg);
    }

    .cta-buttons {
        width: 100%;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-2xl: 4rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

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

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

/* ============================================
   CUSTOM SCROLLBAR - Holz & Stein Design
   Brickwork-inspired scrollbar with 3D effect
============================================ */
/* Webkit browsers (Chrome, Safari, Edge) */
::-webkit-scrollbar {
    width: 16px;
    height: 16px;
}

/* Track - Baustellen-Boden Look */
::-webkit-scrollbar-track {
    background:
        repeating-linear-gradient(
            90deg,
            #e8ddc9 0px,
            #e8ddc9 2px,
            #d7c8b1 2px,
            #d7c8b1 4px
        ),
        linear-gradient(180deg, #f0e6d6 0%, #e8ddc9 100%);
    border: 2px solid #c4b49e;
    border-radius: 10px;
    box-shadow:
        inset 0 2px 4px rgba(0, 0, 0, 0.15),
        inset 0 -2px 4px rgba(255, 255, 255, 0.3);
}

/* Thumb - Backsteinmuster */
::-webkit-scrollbar-thumb {
    background:
        /* Backsteinmuster */
        repeating-linear-gradient(
            0deg,
            #b64926 0px,
            #b64926 8px,
            #9a3d1f 8px,
            #9a3d1f 10px,
            #b64926 10px,
            #b64926 18px,
            #c95d34 18px,
            #c95d34 20px
        ),
        /* Basis Gradient */
        linear-gradient(135deg, #c95d34 0%, #b64926 50%, #9a3d1f 100%);
    border-radius: 8px;
    border: 2px solid #d7c8b1;
    box-shadow:
        /* 3D Effekt */
        inset 0 1px 2px rgba(255, 255, 255, 0.4),
        inset 0 -1px 2px rgba(0, 0, 0, 0.3),
        /* Äußerer Schatten */
        0 2px 8px rgba(182, 73, 38, 0.4),
        0 0 0 1px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

/* Thumb Hover - Aufleuchten wie heißer Backstein */
::-webkit-scrollbar-thumb:hover {
    background:
        repeating-linear-gradient(
            0deg,
            #d96b47 0px,
            #d96b47 8px,
            #b64926 8px,
            #b64926 10px,
            #d96b47 10px,
            #d96b47 18px,
            #e67e5a 18px,
            #e67e5a 20px
        ),
        linear-gradient(135deg, #e67e5a 0%, #d96b47 50%, #b64926 100%);
    border-color: #e8ddc9;
    box-shadow:
        inset 0 1px 3px rgba(255, 255, 255, 0.5),
        inset 0 -1px 3px rgba(0, 0, 0, 0.4),
        0 4px 16px rgba(230, 126, 90, 0.6),
        0 0 12px rgba(217, 107, 71, 0.5),
        0 0 0 2px rgba(232, 221, 201, 0.3);
    transform: scale(1.05);
}

/* Thumb Active - Gedrückter Backstein */
::-webkit-scrollbar-thumb:active {
    background:
        repeating-linear-gradient(
            0deg,
            #9a3d1f 0px,
            #9a3d1f 8px,
            #7d3018 8px,
            #7d3018 10px
        ),
        linear-gradient(135deg, #b64926 0%, #9a3d1f 50%, #7d3018 100%);
    box-shadow:
        inset 0 2px 6px rgba(0, 0, 0, 0.5),
        inset 0 -1px 2px rgba(255, 255, 255, 0.2),
        0 1px 4px rgba(0, 0, 0, 0.3);
    transform: scale(0.98);
}

/* Corner - Baustellen-Ecke */
::-webkit-scrollbar-corner {
    background:
        linear-gradient(45deg, #d7c8b1 25%, transparent 25%),
        linear-gradient(-45deg, #d7c8b1 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #d7c8b1 75%),
        linear-gradient(-45deg, transparent 75%, #d7c8b1 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    border: 2px solid #c4b49e;
    border-radius: 4px;
}

/* Firefox - Vereinfachte Version */
* {
    scrollbar-width: thin;
    scrollbar-color: #b64926 #e8ddc9;
}