/* 
    Wulf Systems Landing Page Style 
    Modern, B2B, Secure, Professional
*/

:root {
    /* Colors - Black & White / Monochrome Theme */
    --bg-color: #000000;   /* Pure Black */
    --bg-alt: #0a0a0a;     /* Very Dark Slate */
    --text-color: #ffffff; /* Pure White */
    --text-muted: #888888; /* Gray 500 */
    --primary: #ffffff;    /* High Contrast White */
    --accent-gray-light: #cccccc;
    --accent-gray-dark: #333333;
    --success: #ffffff;    
    --error: #ff4444;      /* Red kept for critical feedback only */
    --border: #222222;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 80px 20px;
    --border-radius: 4px; /* Sharper corners for B&W look */
    --transition: all 0.3s ease;
}

/* Base resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.text-center { text-align: center; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: #000;
    box-shadow: 0 4px 14px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background-color: #eee;
    transform: translateY(-1px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Header */
.header {
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
    display: block;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.lang-switcher a {
    font-size: 0.875rem;
    opacity: 0.5;
    padding: 2px 4px;
}

.lang-switcher a.active {
    opacity: 1;
    font-weight: 700;
    border-bottom: 2px solid var(--primary);
}

/* Mobile Nav */
.nav-toggle, .nav-toggle-label, .nav-mobile {
    display: none;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.section-text {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 800px;
    margin-bottom: 2rem;
}

/* Hero */
.section-hero {
    padding-top: 100px;
    padding-bottom: 60px;
    background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.05), transparent 40%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-intro-list {
    margin-bottom: 1.5rem;
}

.hero-intro-list li {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.hero-intro-list li::before {
    content: "•";
    color: var(--primary);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

.hero-supporting {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Hero Visual - Abstract Shapes */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.abstract-shape {
    position: absolute;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    filter: blur(40px);
    opacity: 0.2;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: #ffffff;
    top: 50px;
    left: 50px;
    animation: morph 15s ease-in-out infinite;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: #333333;
    bottom: 50px;
    right: 50px;
    animation: morph 20s ease-in-out infinite reverse;
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

.abstract-icon {
    position: relative;
    z-index: 10;
}

.icon-shield, .icon-archive, .icon-lock {
    width: 120px;
    height: 120px;
    background-color: var(--primary);
    mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
}

/* Simple CSS Icons */
.icon-shield {
    background: linear-gradient(135deg, #ffffff, #666666);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.icon-archive {
    background: linear-gradient(135deg, #ffffff, #333333);
    border: 10px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    position: relative;
}

.icon-archive::after {
    content: "";
    position: absolute;
    top: 20%;
    left: 10%;
    right: 10%;
    height: 10px;
    background: rgba(255,255,255,0.2);
}

.icon-lock {
    background: linear-gradient(135deg, #ffffff, #444444);
    width: 80px;
    height: 80px;
    border-radius: 10px;
    position: relative;
    margin-top: 40px;
}

.icon-lock::before {
    content: "";
    position: absolute;
    top: -40px;
    left: 10px;
    width: 60px;
    height: 60px;
    border: 10px solid #ffffff;
    border-bottom: none;
    border-radius: 30px 30px 0 0;
}

/* Trust Row */
.section-trust {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 30px 0;
    background: rgba(255,255,255,0.02);
}

.trust-row {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.trust-icon {
    color: var(--primary);
    font-weight: bold;
}

/* Problem Section */
.section-problem {
    background-color: rgba(239, 68, 68, 0.03);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.problem-cards {
    display: grid;
    gap: 1.5rem;
}

.problem-card {
    background-color: var(--bg-alt);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    display: flex;
    gap: 1rem;
    border-left: 4px solid var(--error);
}

.problem-icon {
    color: var(--error);
    font-weight: bold;
    font-size: 1.25rem;
}

/* Solution Section */
.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.solution-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.solution-feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.solution-check {
    color: var(--success);
    font-weight: bold;
}

.visual-box {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--bg-alt), transparent);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

/* Service Blocks */
.service-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 80px;
    align-items: center;
}

.service-block-reverse {
    direction: rtl;
}

.service-block-content {
    direction: ltr;
}

.service-block-title {
    color: var(--primary);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
}

.service-block-subtitle {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.service-block-text {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

.service-block-list {
    margin-bottom: 1.5rem;
}

.service-block-list li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.service-block-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary);
}

.service-block-additional {
    color: var(--primary);
    font-size: 0.9rem;
}

.visual-placeholder {
    width: 100%;
    height: 350px;
    background-color: var(--bg-alt);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

.visual-placeholder::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.05), transparent);
}

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

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.benefit-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.benefit-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.benefit-icon {
    font-size: 1.5rem;
    color: var(--success);
    margin-bottom: 1rem;
}

/* Why Wulf Systems */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.why-card {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

.why-card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.why-card-text {
    color: var(--text-muted);
}

/* FAQ Section */
.faq-accordion {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.faq-question {
    padding: 1.5rem 0;
    font-weight: 600;
    font-size: 1.125rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-toggle-icon {
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

details[open] .faq-toggle-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding-bottom: 1.5rem;
    color: var(--text-muted);
}

/* Contact Section */
.section-contact {
    background: linear-gradient(to bottom, var(--bg-color), var(--bg-alt));
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-form-wrapper {
    background-color: var(--bg-color);
    padding: 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    background-color: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: #fff;
    font-size: 1rem;
}

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

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input {
    width: auto;
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 2rem;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

/* Footer */
.footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    background-color: var(--bg-color);
    color: var(--text-muted);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-nav {
    display: flex;
    gap: 2rem;
}

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

/* Variant Accents - Monochrome Tones */
body.service-mail-security { --primary: #ffffff; }
body.service-mail-archivierung { --primary: #dddddd; }
body.service-mail-verschluesselung { --primary: #bbbbbb; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-grid, .problem-grid, .solution-grid, .service-block, .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .service-block-reverse {
        direction: ltr;
    }
}

@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .nav-toggle-label {
        display: block;
        cursor: pointer;
        padding: 10px;
    }
    
    .nav-toggle-label span,
    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        display: block;
        width: 25px;
        height: 2px;
        background: #fff;
        position: relative;
        transition: var(--transition);
    }
    
    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        content: "";
        position: absolute;
    }
    
    .nav-toggle-label span::before { top: -8px; }
    .nav-toggle-label span::after { bottom: -8px; }
    
    .nav-mobile {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-color);
        display: none;
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
        gap: 2rem;
        z-index: 999;
    }
    
    .nav-toggle:checked ~ .nav-mobile {
        display: flex;
    }
    
    .nav-toggle:checked ~ .nav-toggle-label span { background: transparent; }
    .nav-toggle:checked ~ .nav-toggle-label span::before { transform: rotate(45deg); top: 0; }
    .nav-toggle:checked ~ .nav-toggle-label span::after { transform: rotate(-45deg); bottom: 0; }
    
    .header-actions {
        gap: 0.5rem;
    }
}