@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Oswald:wght@400;500;600;700&display=swap');

/* ==========================================================================
   Design System & Farbpalette
   - #F9DF70 : Call-to-action, Hover-Effekt, Akzente
   - #1A1A1A : H1, H2, Header, Footer-Hintergrund, Button-Text
   - #828282 : Fließtext, Icons, Rahmen, Trennlinien
   - #EBEBEB : Hintergrund & heller Kontrasttext
   ========================================================================== */
:root {
    --color-cta: #F9DF70;
    --color-dark: #1A1A1A;
    --color-gray: #828282;
    --color-bg: #EBEBEB;
    --color-white: #FFFFFF;
    --header-height: 68px;
}

/* Grundlegende Einstellungen & Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-text-size-adjust: 100%;
}

body {
    line-height: 1.6;
    color: var(--color-gray);
    background-color: var(--color-bg);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body.nav-locked {
    overflow: hidden;
}

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

strong, b {
    color: var(--color-dark);
    font-weight: 600;
}

h1, h2, h3, h4, h5, h6, .logo {
    font-family: 'Oswald', sans-serif;
    color: var(--color-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.25;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
header {
    background-color: var(--color-dark);
    color: var(--color-cta);
    padding: 0.8rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--color-cta);
    min-height: var(--header-height);
}

header .logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-cta);
    text-decoration: none;
    z-index: 1001;
}

.logo-icon {
    height: 38px;
    width: auto;
    object-fit: contain;
}

nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

nav a {
    color: var(--color-bg);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.25s ease, border-color 0.25s ease;
    padding: 0.3rem 0;
    border-bottom: 2px solid transparent;
}

nav a:hover {
    color: var(--color-cta);
}

nav a.active {
    color: var(--color-cta);
    border-bottom: 2px solid var(--color-cta);
}

/* Hamburger Menü Button (Mobile) */
.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    width: 44px;
    height: 44px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    z-index: 1001;
    -webkit-tap-highlight-color: transparent;
}

.mobile-nav-toggle span {
    display: block;
    width: 26px;
    height: 3px;
    background-color: var(--color-cta);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

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

.mobile-nav-toggle.is-active span:nth-child(2) {
    opacity: 0;
}

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

/* ==========================================================================
   Hero Section (Startseite)
   ========================================================================== */
.hero {
    background-color: var(--color-dark);
    color: var(--color-bg);
    padding: clamp(3.5rem, 8vw, 6rem) 1.25rem;
    text-align: center;
    border-bottom: 5px solid var(--color-cta);
}

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

.hero-logo {
    max-width: clamp(100px, 20vw, 150px);
    height: auto;
    margin: 0 auto 1.5rem auto;
    display: block;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.4));
}

.hero h1 {
    font-size: clamp(1.6rem, 5vw, 2.5rem);
    margin-bottom: 1rem;
    color: var(--color-cta);
    word-break: break-word;
}

.hero p {
    font-size: clamp(1.05rem, 3.2vw, 1.25rem);
    margin-bottom: 1.5rem;
    color: var(--color-bg);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

/* ==========================================================================
   Page Hero (Unterseiten)
   ========================================================================== */
.page-hero {
    background-color: var(--color-dark);
    color: var(--color-bg);
    padding: clamp(2.5rem, 6vw, 4.5rem) 1.25rem;
    text-align: center;
    border-bottom: 5px solid var(--color-cta);
}

.page-hero h1 {
    font-size: clamp(1.8rem, 5.5vw, 2.5rem);
    margin-bottom: 0.8rem;
    color: var(--color-cta);
}

.page-hero p {
    font-size: clamp(1rem, 3vw, 1.15rem);
    max-width: 750px;
    margin: 0 auto;
    color: var(--color-bg);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    background-color: var(--color-cta);
    color: var(--color-dark);
    padding: 0.85rem 2rem;
    text-decoration: none;
    font-family: 'Oswald', sans-serif;
    font-weight: 600;
    font-size: 1.05rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 4px;
    transition: background-color 0.25s ease, transform 0.2s ease, border-color 0.25s ease, box-shadow 0.2s ease;
    border: 2px solid var(--color-cta);
    text-align: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.btn:hover {
    background-color: #ebd060;
    border-color: #ebd060;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-bg);
    border: 2px solid var(--color-bg);
}

.btn-secondary:hover {
    background-color: var(--color-cta);
    color: var(--color-dark);
    border-color: var(--color-cta);
}

/* ==========================================================================
   Inhaltsbereiche (Sektionen)
   ========================================================================== */
.content-section {
    padding: clamp(3rem, 6vw, 5rem) 1.25rem;
    max-width: 1200px;
    margin: 0 auto;
}

.bg-light {
    background-color: var(--color-bg);
}

h2 {
    text-align: center;
    font-size: clamp(1.6rem, 4.5vw, 2.2rem);
    margin-bottom: clamp(1.2rem, 3vw, 2rem);
    color: var(--color-dark);
}

.intro-text {
    text-align: center;
    max-width: 800px;
    margin: 0 auto clamp(2rem, 4vw, 3rem) auto;
    font-size: clamp(1rem, 2.5vw, 1.05rem);
}

.section-cta {
    text-align: center;
    margin-top: clamp(2rem, 4vw, 3rem);
}

/* ==========================================================================
   Split Layout (Text & Bild)
   ========================================================================== */
.split-layout {
    display: flex;
    align-items: center;
    gap: clamp(1.5rem, 4vw, 2.5rem);
}

.split-layout.reverse {
    flex-direction: row-reverse;
}

.text-box {
    flex: 1.2;
}

.image-box {
    flex: 1;
    display: flex;
    justify-content: center;
}

.image-box img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 14px rgba(26, 26, 26, 0.12);
    border: 1px solid rgba(130, 130, 130, 0.3);
}

.portrait-img {
    max-width: 320px;
    height: auto;
    object-fit: cover;
}

.text-box h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-dark);
    font-size: 1.25rem;
}

ul {
    margin-top: 1rem;
    padding-left: 1.25rem;
}

ul li {
    margin-bottom: 0.6rem;
    color: var(--color-gray);
}

/* ==========================================================================
   Grid Layout für Leistungen
   ========================================================================== */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--color-white);
    padding: clamp(1.4rem, 3vw, 1.8rem);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(26, 26, 26, 0.08);
    border: 1px solid rgba(130, 130, 130, 0.2);
    border-left: 5px solid var(--color-cta);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 14px rgba(26, 26, 26, 0.12);
}

.card h3 {
    margin-bottom: 0.5rem;
    color: var(--color-dark);
    font-size: 1.25rem;
}

.card p {
    color: var(--color-gray);
    font-size: 0.95rem;
}

/* ==========================================================================
   Bauprojekte (Vorher- & Nachher-Vergleiche)
   ========================================================================== */
.projects-container {
    display: flex;
    flex-direction: column;
    gap: clamp(2.5rem, 5vw, 3.5rem);
    padding: clamp(2.5rem, 5vw, 4.5rem) 1.25rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-item {
    background-color: var(--color-white);
    border-radius: 10px;
    padding: clamp(1.25rem, 3vw, 2.2rem);
    box-shadow: 0 4px 16px rgba(26, 26, 26, 0.08);
    border: 1px solid rgba(130, 130, 130, 0.2);
    border-top: 5px solid var(--color-cta);
}

.project-header {
    margin-bottom: 1.5rem;
}

.project-header h3 {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    color: var(--color-dark);
    margin-bottom: 0.4rem;
}

.project-header p {
    color: var(--color-gray);
    font-size: clamp(0.95rem, 2vw, 1.05rem);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.comparison-card {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--color-dark);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(130, 130, 130, 0.3);
}

.comparison-card img {
    width: 100%;
    height: 440px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.comparison-card:hover img {
    transform: scale(1.02);
}

.badge {
    position: absolute;
    top: 0.85rem;
    left: 0.85rem;
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 0.35rem 0.85rem;
    border-radius: 4px;
    z-index: 2;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.badge-vorher {
    background-color: var(--color-dark);
    color: var(--color-bg);
    border: 1px solid var(--color-gray);
}

.badge-nachher {
    background-color: var(--color-cta);
    color: var(--color-dark);
}

/* ==========================================================================
   Kontakt & Footer
   ========================================================================== */
.footer-contact {
    text-align: center;
    background-color: var(--color-dark);
    color: var(--color-bg);
    max-width: 100%;
    padding: clamp(3.5rem, 6vw, 5rem) 1.25rem;
    border-top: 5px solid var(--color-cta);
}

.footer-contact h2 {
    color: var(--color-cta);
}

.footer-contact p {
    color: var(--color-bg);
    font-size: 1.05rem;
}

.contact-details {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    max-width: 950px;
    margin-left: auto;
    margin-right: auto;
}

.contact-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(130, 130, 130, 0.25);
    border-radius: 8px;
    padding: 1.2rem 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-align: left;
    flex: 1 1 260px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact-item:hover {
    border-color: var(--color-cta);
    transform: translateY(-2px);
}

.contact-icon {
    font-size: 1.6rem;
    flex-shrink: 0;
}

.contact-item strong {
    color: var(--color-cta);
    display: block;
    font-size: 0.85rem;
    text-transform: uppercase;
    font-family: 'Oswald', sans-serif;
    letter-spacing: 0.5px;
}

.contact-item p {
    margin: 0;
    color: var(--color-bg);
    font-size: 1rem;
    word-break: break-all;
}

.contact-item a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease, opacity 0.2s ease;
}

.contact-item a:hover {
    color: var(--color-cta);
    text-decoration: underline;
}

footer {
    background-color: #121212;
    color: var(--color-gray);
    text-align: center;
    padding: 1.5rem 1.25rem;
    font-size: 0.85rem;
    border-top: 1px solid rgba(130, 130, 130, 0.2);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-bottom span {
    color: var(--color-gray);
}

.footer-bottom a {
    color: var(--color-gray);
    text-decoration: none;
    transition: color 0.25s ease;
}

.footer-bottom a:hover,
.footer-bottom a.active-footer {
    color: var(--color-cta);
    text-decoration: underline;
}

/* ==========================================================================
   Rechtliche Seiten (Impressum & Datenschutz)
   ========================================================================== */
.legal-container {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(2.5rem, 5vw, 4.5rem) 1.25rem;
}

.legal-card {
    background-color: var(--color-white);
    border-radius: 8px;
    padding: clamp(1.5rem, 4vw, 3rem);
    box-shadow: 0 4px 16px rgba(26, 26, 26, 0.06);
    border: 1px solid rgba(130, 130, 130, 0.2);
    border-top: 5px solid var(--color-cta);
}

.legal-card h2 {
    text-align: left;
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    color: var(--color-dark);
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    border-bottom: 1px solid rgba(130, 130, 130, 0.15);
    padding-bottom: 0.4rem;
}

.legal-card h2:first-child,
.legal-card h3:first-child {
    margin-top: 0;
}

.legal-card h3 {
    font-size: 1.1rem;
    color: var(--color-dark);
    margin-top: 1.5rem;
    margin-bottom: 0.3rem;
}

.legal-card p {
    color: var(--color-gray);
    margin-bottom: 0.85rem;
    font-size: 1rem;
    line-height: 1.65;
}

.legal-card p strong {
    color: var(--color-dark);
}

.legal-card ul {
    margin-top: 0.5rem;
    margin-bottom: 1.2rem;
    padding-left: 1.5rem;
}

.legal-card ul li {
    margin-bottom: 0.5rem;
    color: var(--color-gray);
}

.legal-card a {
    color: var(--color-dark);
    text-decoration: underline;
    transition: color 0.2s ease;
    word-break: break-word;
}

.legal-card a:hover {
    color: var(--color-cta);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* Tablets & kleinere Bildschirme (<= 850px) */
@media (max-width: 850px) {
    .split-layout, 
    .split-layout.reverse {
        flex-direction: column;
        text-align: left;
    }

    .image-box {
        width: 100%;
    }

    .portrait-img {
        max-width: 280px;
    }
}

/* Smartphones & Mobile Navigation (<= 768px) */
@media (max-width: 768px) {
    header {
        padding: 0.75rem 1.25rem;
    }

    .mobile-nav-toggle {
        display: flex;
    }

    #primary-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        background-color: var(--color-dark);
        flex-direction: column;
        align-items: stretch;
        padding: 0.8rem 1.25rem 1.25rem;
        border-bottom: 3px solid var(--color-cta);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
        gap: 0;
        z-index: 999;
    }

    #primary-nav.nav-open {
        display: flex;
        animation: navSlideDown 0.25s ease forwards;
    }

    #primary-nav a {
        padding: 0.85rem 0.5rem;
        font-size: 1.05rem;
        border-bottom: 1px solid rgba(130, 130, 130, 0.2);
        width: 100%;
    }

    #primary-nav a:last-child {
        border-bottom: none;
    }

    #primary-nav a.active {
        border-bottom-color: var(--color-cta);
    }

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

    .comparison-card img {
        height: 280px;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin: 1.2rem auto 0;
    }

    .btn {
        width: 100%;
    }

    .contact-item {
        flex: 1 1 100%;
    }
}

/* Sehr kleine Displays (<= 400px) */
@media (max-width: 400px) {
    header .logo {
        font-size: 1.15rem;
    }

    .logo-icon {
        height: 32px;
    }

    .comparison-card img {
        height: 240px;
    }

    .portrait-img {
        max-width: 240px;
    }
}

@keyframes navSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}