/* ===== CSS Reset & Variables ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Colors */
    --color-primary: #1a1a2e;
    --color-secondary: #16213e;
    --color-accent: #c41e3a;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-background: #ffffff;
    --color-background-alt: #f8f9fa;
    --color-border: #e5e5e5;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;

    /* Shadows */
    --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);
}

/* ===== Base Styles ===== */
html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
}

/* ===== Utilities ===== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.logo-bracket {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-links a:hover {
    color: var(--color-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition-base);
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: relative;
}

.nav-toggle-label span::before {
    top: -7px;
}

.nav-toggle-label span::after {
    top: 5px;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 700px;
}

.hero-subtitle {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-background);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.hero .btn-primary:hover {
    background-color: #a01830;
}

/* ===== Services Section ===== */
.services {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-background);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    padding: var(--spacing-xl);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all var(--transition-base);
}

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

.service-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background-alt);
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.service-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-base);
    line-height: 1.7;
}

/* ===== Referenzen Section ===== */
.referenzen {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-background-alt);
}

.referenzen-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.referenz-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background-color: var(--color-background);
    border-radius: 8px;
    min-height: 120px;
    transition: all var(--transition-base);
}

.referenz-item:hover {
    box-shadow: var(--shadow-md);
}

.referenz-name {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

.referenz-more .referenz-name {
    font-style: italic;
    font-weight: 400;
}

/* ===== Kontakt Section ===== */
.kontakt {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-background);
}

.kontakt-content {
    display: flex;
    justify-content: center;
}

.kontakt-info {
    width: 100%;
    max-width: 600px;
}

.kontakt-card {
    background-color: var(--color-background-alt);
    border-radius: 12px;
    padding: var(--spacing-xl);
}

.kontakt-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.kontakt-item:last-child {
    border-bottom: none;
}

.kontakt-item svg {
    flex-shrink: 0;
    color: var(--color-accent);
    margin-top: 4px;
}

.kontakt-item strong {
    display: block;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.kontakt-item p {
    color: var(--color-text);
    line-height: 1.6;
}

.kontakt-item a {
    color: var(--color-primary);
}

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

/* ===== Footer ===== */
.footer {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: var(--color-background);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    font-size: var(--font-size-sm);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-nav a {
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-background);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .services-grid,
    .referenzen-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero h1 {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .nav-toggle-label {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-background);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        border-bottom: 1px solid var(--color-border);
    }

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

    .nav-links a {
        display: block;
        padding: var(--spacing-md) 0;
    }

    .nav-toggle:checked ~ .nav-links {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle:checked ~ .nav-toggle-label span {
        background-color: transparent;
    }

    .nav-toggle:checked ~ .nav-toggle-label span::before {
        top: 0;
        transform: rotate(45deg);
    }

    .nav-toggle:checked ~ .nav-toggle-label span::after {
        top: -2px;
        transform: rotate(-45deg);
    }

    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    }

    .hero h1 {
        font-size: var(--font-size-3xl);
    }

    .hero-description {
        font-size: var(--font-size-lg);
    }

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

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: var(--font-size-2xl);
    }

    .service-card {
        padding: var(--spacing-lg);
    }

    .kontakt-card {
        padding: var(--spacing-md);
    }
}

/* ===== Legal Pages (Impressum, Datenschutz) ===== */
.legal-page {
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    padding-bottom: var(--spacing-3xl);
    min-height: calc(100vh - 200px);
}

.legal-page h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.legal-content {
    max-width: 800px;
}

.legal-section {
    margin-bottom: var(--spacing-xl);
}

.legal-section h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.legal-section h3 {
    font-size: var(--font-size-lg);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.legal-section p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
    line-height: 1.8;
}

.legal-section address {
    font-style: normal;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.legal-section ul {
    margin: var(--spacing-sm) 0 var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-light);
}

.legal-section ul li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.7;
}

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

.legal-section a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .legal-page {
        padding-top: calc(var(--header-height) + var(--spacing-lg));
    }

    .legal-page h1 {
        font-size: var(--font-size-2xl);
    }

    .legal-section h2 {
        font-size: var(--font-size-lg);
    }
}