/* ===================================
   CSS Variables & Design System
   German Design Standards
   =================================== */
:root {
    /* Primary Colors - German Standards */
    --color-navy: #1F3A5F;
    --color-navy-dark: #152B45;
    --color-navy-light: #2D4A6F;

    /* Accent Color - Teal */
    --color-teal: #0FA3B1;
    --color-teal-dark: #0C8A96;
    --color-teal-light: #3BB5C1;

    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-grey-50: #F9FAFB;
    --color-grey-100: #F2F4F7;
    --color-grey-200: #E5E7EB;
    --color-grey-300: #D1D5DB;
    --color-grey-400: #9CA3AF;
    --color-grey-500: #6B7280;
    --color-grey-600: #4B5563;
    --color-grey-700: #374151;
    --color-grey-800: #1F2937;
    --color-grey-900: #111827;

    /* Text Colors */
    --color-text-primary: #1F2937;
    --color-text-secondary: #4B5563;
    --color-text-tertiary: #6B7280;

    /* Background Colors */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F2F4F7;
    --color-bg-tertiary: #F9FAFB;

    /* Typography - Inter Font Family */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-headings: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Font Sizes - Desktop */
    --font-size-body: 17px;
    --font-size-small: 15px;
    --font-size-h1: 44px;
    --font-size-h2: 32px;
    --font-size-h3: 24px;
    --font-size-h4: 20px;
    --font-size-button: 16px;
    --font-size-nav: 15px;

    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

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

    /* Border Radius - Subtle */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Shadows - Subtle, Professional */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-card-hover: 0 2px 8px rgba(15, 163, 177, 0.15);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-size: var(--font-size-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-headings);
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--color-navy);
}

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

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

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

h4 {
    font-size: var(--font-size-h4);
}

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

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

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

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-teal) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.fade-in-delay-1 {
    animation: fadeIn 0.8s ease 0.2s forwards;
    opacity: 0;
}

.fade-in-delay-2 {
    animation: fadeIn 0.8s ease 0.4s forwards;
    opacity: 0;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-grey-200);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-image {
    height: 50px;
    width: auto;
    display: block;
}

.logo-text {
    font-family: var(--font-headings);
    font-size: 28px;
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-teal) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    font-family: var(--font-body);
    font-size: var(--font-size-nav);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-teal);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-navy);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-navy);
    transition: all var(--transition-base);
}

/* Language Toggle */
.language-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-grey-50);
    border: 1px solid var(--color-grey-200);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: var(--font-weight-medium);
}

.language-toggle:hover {
    background: var(--color-grey-100);
    border-color: var(--color-teal);
}

.lang-option {
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
    font-weight: var(--font-weight-semibold);
}

.lang-option.active {
    color: var(--color-teal);
}

.lang-separator {
    color: var(--color-grey-300);
}


/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-button);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-align: center;
    line-height: 1.5;
}

.btn-primary {
    background: var(--color-teal);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--color-teal-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--color-navy);
    color: var(--color-white);
    transform: translateY(-1px);
}

.btn-large {
    padding: 14px 32px;
    font-size: 17px;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 100px;
    padding-bottom: var(--space-3xl);
    background: var(--color-white);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, var(--color-grey-50) 0%, var(--color-white) 100%);
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(15, 163, 177, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(31, 58, 95, 0.05) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-2xl) 0;
}

.hero-title {
    margin-bottom: var(--space-lg);
    line-height: 1.15;
    color: var(--color-navy);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    animation: float 3s ease-in-out infinite;
}

.scroll-arrow {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-primary);
    border-radius: 20px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

/* ===================================
   Section Styles
   =================================== */
section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-normal);
}

/* ===================================
   Problem/Solution Section
   =================================== */
.problem-solution {
    background: var(--color-bg-secondary);
}

.problem-solution-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.problem-card,
.solution-card {
    background: var(--color-white);
    border: 1px solid var(--color-grey-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-card);
}

.problem-card:hover,
.solution-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-teal);
    box-shadow: var(--shadow-card-hover);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.problem-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #FDB813 0%, #F59E0B 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(253, 184, 19, 0.3);
}

.problem-card h3,
.solution-card h3 {
    font-family: var(--font-headings);
    margin-bottom: var(--space-md);
    color: var(--color-navy);
}

.problem-card p,
.solution-card p {
    color: var(--color-text-secondary);
}

.solution-card {
    border-color: var(--color-teal);
    border-width: 2px;
}

/* ===================================
   Services Section
   =================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-grey-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-teal);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.service-card:hover::before {
    transform: scaleX(1);
}

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

.service-icon {
    margin-bottom: var(--space-lg);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    background: var(--color-teal);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.icon-wrapper svg {
    width: 40px;
    height: 40px;
    color: var(--color-white);
}

.service-title {
    font-family: var(--font-headings);
    margin-bottom: var(--space-md);
    color: var(--color-navy);
}

.service-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

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

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.benefit-card {
    background: var(--color-white);
    border: 1px solid var(--color-grey-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    text-align: center;
    box-shadow: var(--shadow-card);
}

.benefit-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-teal);
    box-shadow: var(--shadow-card-hover);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.benefit-card h3 {
    font-family: var(--font-headings);
    font-size: 20px;
    margin-bottom: var(--space-sm);
    color: var(--color-navy);
}

.benefit-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
}

/* ===================================
   Contact Section
   =================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
    align-items: start;
}

.contact-description {
    font-size: 18px;
    margin-bottom: var(--space-xl);
    color: var(--color-text-secondary);
}

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

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

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-family: var(--font-headings);
    margin-bottom: var(--space-xs);
    font-size: 16px;
    color: var(--color-navy);
}

.contact-item a,
.contact-item p {
    color: var(--color-text-secondary);
    margin: 0;
}

.contact-form-wrapper {
    background: var(--color-white);
    border: 1px solid var(--color-grey-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-card);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-family: var(--font-body);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-xs);
    color: var(--color-navy);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-grey-50);
    border: 1px solid var(--color-grey-300);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-teal);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(15, 163, 177, 0.1);
}

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

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-navy);
    border-top: none;
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-brand h3 {
    color: #F5F5F7;
}

.footer-brand .logo-text {
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
    color: #F5F5F7;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.8);
    margin-top: var(--space-sm);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-xl);
}

.footer-column h4 {
    font-family: var(--font-headings);
    font-size: 16px;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-teal-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    :root {
        --font-size-h1: 32px;
        --font-size-h2: 26px;
        --font-size-h3: 20px;
        --font-size-body: 16px;
    }

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

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-grey-200);
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-base);
        pointer-events: none;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-large {
        width: 100%;
    }

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

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

@media (max-width: 480px) {

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