/* ========================================
   IT-Hilfe Sofort - Modern CSS
   Mobile-First, Performance-Optimized
   ======================================== */

/* CSS Custom Properties */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #10b981;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-border: #e5e7eb;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --border-radius: 0.5rem;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.2s ease;
}

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

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

body {
    font-family: var(--font-family);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-bg);
}

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

/* Links - Blue with white text on buttons, smooth hover */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

.highlight {
    color: var(--color-primary);
}

/* Buttons - Blue background, white text, smooth hover */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: #059669;
    color: white;
    text-decoration: none;
}

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-text {
    background: none;
    color: var(--color-text-light);
    padding: 0.5rem 1rem;
}

.btn-text:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Header & Navigation */
.header {
    background: var(--color-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

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

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

.nav-menu {
    display: none;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-menu a {
    color: var(--color-text);
    font-weight: 500;
}

.nav-menu a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-text);
    margin: 5px 0;
    transition: var(--transition);
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
    .nav-toggle {
        display: none;
    }
}

/* Mobile Navigation Active State */
.nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #dbeafe 100%);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

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

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.affiliate-disclosure {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

@media (min-width: 640px) {
    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }
}

/* Sections */
.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-intro {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* USPs */
.usps {
    background: var(--color-bg-alt);
}

.usp-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.usp-card {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

.usp-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.usp-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

@media (min-width: 640px) {
    .usp-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .usp-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Social Proof */
.social-proof {
    text-align: center;
}

.proof-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.testimonial {
    max-width: 700px;
    margin: 0 auto;
    font-style: italic;
    font-size: 1.125rem;
    color: var(--color-text-light);
}

.testimonial cite {
    display: block;
    margin-top: var(--spacing-sm);
    font-style: normal;
    font-weight: 600;
    color: var(--color-text);
}

/* Services */
.services-teaser {
    background: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.service-card {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.service-card h3 {
    margin-bottom: var(--spacing-xs);
}

.service-card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.link-arrow {
    color: var(--color-primary);
    font-weight: 600;
}

.link-arrow::after {
    content: ' →';
}

.link-arrow:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    margin-bottom: var(--spacing-sm);
}

.cta p {
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    justify-content: center;
}

@media (min-width: 640px) {
    .cta-buttons {
        flex-direction: row;
    }
}

.cta .btn-outline {
    border-color: white;
    color: white;
}

.cta .btn-outline:hover {
    background: white;
    color: var(--color-primary);
    text-decoration: none;
}

/* Footer */
.footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.footer ul {
    list-style: none;
}

.footer li {
    margin-bottom: var(--spacing-xs);
}

.footer a {
    color: #d1d5db;
}

.footer a:hover {
    color: white;
    text-decoration: underline;
}

.affiliate-note {
    opacity: 0.7;
    font-size: 0.875rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.7;
    font-size: 0.875rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-bg);
    box-shadow: 0 -4px 6px rgba(0,0,0,0.1);
    padding: var(--spacing-lg);
    z-index: 2000;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.cookie-banner:not(.hidden) {
    transform: translateY(0);
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
}

.cookie-content p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

.cookie-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Utility Classes */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* Print Styles */
@media print {
    .header, .footer, .cookie-banner, .cta {
        display: none;
    }
}