/* ========================================
   BRÜCKEN Landing Page Styles
   Modern, high-performance, mobile-first design
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-blue: #2B7AB5;
    --accent-orange: #F5A623;
    --dark-navy: #1a1a2e;
    --gray-600: #6B7280;
    --gray-300: #D1D5DB;
    --gray-100: #F3F4F6;
    --white: #FFFFFF;

    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 18px;
    --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: 80px;

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

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 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-main);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--dark-navy);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-heading);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--font-size-h1); font-weight: 900; }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }

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

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

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

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

section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-lg);
    color: var(--dark-navy);
}

.section-title.centered {
    text-align: center;
}

/* Buttons */
.cta-button {
    display: inline-block;
    padding: 16px 40px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-medium);
    text-align: center;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1e5a8a 100%);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(43, 122, 181, 0.3);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(43, 122, 181, 0.4);
}

.cta-button.primary:active {
    transform: translateY(0);
}

.cta-button.secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    box-shadow: 0 2px 8px rgba(43, 122, 181, 0.2);
}

.cta-button.secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(43, 122, 181, 0.3);
}

.cta-button.secondary:active {
    transform: translateY(0);
}

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

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(43, 122, 181, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(245, 166, 35, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-logo {
    max-width: 400px;
    width: 100%;
    height: auto;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    color: var(--dark-navy);
}

.hero-subtitle {
    font-size: 22px;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

/* ========================================
   VALUE PROPOSITION SECTION
   ======================================== */
.value-prop {
    background-color: var(--white);
}

.value-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.value-description {
    font-size: 20px;
    line-height: 1.7;
    color: var(--gray-600);
}

/* ========================================
   BENEFITS SECTION
   ======================================== */
.benefits {
    background-color: var(--gray-100);
}

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

.benefit-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.benefit-icon {
    margin-bottom: var(--spacing-md);
}

.benefit-title {
    color: var(--dark-navy);
    margin-bottom: var(--spacing-sm);
}

.benefit-description {
    color: var(--gray-600);
    font-size: 16px;
}

/* ========================================
   HOW IT WORKS SECTION
   ======================================== */
.how-it-works {
    background-color: var(--white);
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: var(--spacing-md);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1e5a8a 100%);
    color: var(--white);
    font-size: 28px;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

.step-title {
    margin-bottom: var(--spacing-sm);
    color: var(--dark-navy);
}

.step-description {
    color: var(--gray-600);
    font-size: 16px;
}

.step-connector {
    font-size: 32px;
    color: var(--primary-blue);
    font-weight: bold;
}

/* ========================================
   SECTORS SECTION
   ======================================== */
.sectors {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1e5a8a 100%);
    color: var(--white);
}

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

.sectors-header {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
}

.sectors-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

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

.sector-card {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    backdrop-filter: blur(10px);
    transition: transform var(--transition-medium), background var(--transition-medium);
}

.sector-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.18);
}

.sector-icon {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-orange);
}

.sector-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 0;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-section {
    background-color: var(--gray-100);
}

.contact-subtitle {
    text-align: center;
    font-size: 20px;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--dark-navy);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    font-family: var(--font-main);
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
}

.contact-form .cta-button {
    width: 100%;
    margin-top: var(--spacing-sm);
}

.form-success {
    max-width: 700px;
    margin: var(--spacing-lg) auto 0;
    padding: var(--spacing-md);
    background: #10b981;
    color: var(--white);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
}

.contact-alternative {
    max-width: 700px;
    margin: var(--spacing-xl) auto 0;
    padding: var(--spacing-lg);
    text-align: center;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.alternative-text {
    font-size: 18px;
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.contact-alternative .cta-button {
    display: inline-block;
    width: auto;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    text-align: center;
}

.footer-logo-img {
    max-width: 200px;
    height: auto;
    margin: 0 auto var(--spacing-sm);
    filter: brightness(0) invert(1);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 16px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-orange);
}

.footer-legal {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-legal-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-legal-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

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

/* Tablet (768px and below) */
@media screen and (max-width: 768px) {
    :root {
        --font-size-h1: 36px;
        --font-size-h2: 28px;
        --font-size-h3: 20px;
        --spacing-xl: 60px;
        --spacing-lg: 32px;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-logo {
        max-width: 300px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .steps-container {
        flex-direction: column;
    }

    .step-connector {
        transform: rotate(90deg);
        margin: var(--spacing-sm) 0;
    }

    .sectors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (480px and below) */
@media screen and (max-width: 480px) {
    :root {
        --font-size-base: 16px;
        --font-size-h1: 32px;
        --font-size-h2: 24px;
        --font-size-h3: 18px;
        --spacing-xl: 40px;
        --spacing-lg: 24px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-logo {
        max-width: 240px;
    }

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

    .sectors-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cta-button {
        padding: 14px 32px;
        font-size: 16px;
    }

    .sector-title {
        font-size: 16px;
    }
}

/* Performance Optimizations */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .hero-background,
    .cta-button,
    .contact-form {
        display: none;
    }
}