/* === GLOBAL STYLES & VARIABLES === */
:root {
    --primary-color: #0ea5e9;   /* Sky Blue */
    --secondary-color: #6366f1; /* Indigo */
    --accent-color: #10b981;    /* Emerald */
    --background-color: #f8fafc;/* Slate 50 */
    --surface-color: #ffffff;   /* White */
    --card-color: #f1f5f9;      /* Slate 100 */
    --text-color: #0f172a;      /* Slate 900 */
    --muted-color: #64748b;     /* Slate 500 */

    --font-heading: 'DM Sans', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    --border-radius: 16px;
    --shadow-soft: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-medium: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --transition-fast: all 0.2s ease-in-out;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--background-color);
    background-image: radial-gradient(var(--muted-color) 0.5px, transparent 0.5px);
    background-size: 20px 20px;
    background-position: -19px -19px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; text-align: center; margin-bottom: 3rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--muted-color);
}
p:last-child { margin-bottom: 0; }

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

ul { list-style: none; }

section {
    padding: 6rem 0;
}

.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    padding: 2rem;
    transition: var(--transition-fast);
}
.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-family: var(--font-heading);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 2px solid transparent;
}
.btn-primary {
    background-image: linear-gradient(to right, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}
.btn-secondary {
    background-color: var(--text-color);
    color: white;
}
.btn-secondary:hover {
    background-color: var(--muted-color);
}
.btn-secondary-outline {
    border-color: var(--card-color);
    color: var(--text-color);
}
.btn-secondary-outline:hover {
    background-color: var(--card-color);
}

/* === HEADER === */
.header {
    background-color: var(--surface-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-soft);
}
.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-color);
}
.logo:hover { color: var(--text-color); }

.nav ul {
    display: flex;
    gap: 2rem;
}
.nav a {
    color: var(--muted-color);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}
.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}
.nav a:hover, .nav a.active {
    color: var(--text-color);
}
.nav a:hover::after, .nav a.active::after {
    width: 100%;
}

.header-actions { display: flex; align-items: center; gap: 1rem; }
.mobile-nav-toggle { display: none; }


/* === HERO SECTION === */
.hero-section {
    padding-top: 4rem;
    padding-bottom: 6rem;
    background-color: var(--surface-color);
}
.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}
.badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: #ecfdf5; /* Emerald 50 */
    color: var(--accent-color);
    border-radius: 999px;
    font-weight: 600;
    margin-bottom: 1rem;
}
.hero-content h1 {
    color: var(--text-color);
    margin-bottom: 1.5rem;
}
.hero-content p {
    font-size: 1.125rem;
    max-width: 550px;
    margin-bottom: 2rem;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
}
.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}

/* === TRUST SECTION === */
.trust-section {
    padding: 2rem 0;
    background-color: var(--card-color);
}
.trust-section .container {
    text-align: center;
}
.trust-section p {
    color: var(--muted-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}
.logos-container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}
.logos-container span {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--muted-color);
    opacity: 0.7;
    transition: var(--transition-fast);
}
.logos-container span:hover {
    opacity: 1;
}

/* === PROBLEM-SOLUTION SECTION === */
.problem-solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.problem-card h3, .solution-card h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
}
.accent-red, .accent-green {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.accent-red { background-color: #ef4444; } /* Red */
.accent-green { background-color: var(--accent-color); }
.problem-solution-grid p {
    color: var(--text-color);
}

/* === CONTENT SECTION (Robo-Advisor, KI Trade) === */
.content-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}
.content-section.reversed .content-container {
    grid-template-columns: 1fr 1fr; /* to override mobile styles if needed */
}
.content-section.reversed .content-text { grid-column: 2; grid-row: 1; }
.content-section.reversed .content-image { grid-column: 1; grid-row: 1; }

.content-text strong {
    color: var(--secondary-color);
}
.content-image img {
    width: 100%;
    border-radius: var(--border-radius);
}
.disclaimer {
    font-size: 0.9rem;
    background-color: var(--card-color);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    margin-top: 1.5rem;
}

/* === FEATURES SECTION (Vorteile) === */
.features-section { background-color: var(--surface-color); }
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.feature-card { padding: 0; }
.feature-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}
.feature-card h3 {
    padding: 1.5rem 1.5rem 0.5rem 1.5rem;
}
.feature-card p {
    padding: 0 1.5rem 1.5rem 1.5rem;
}

/* === STEPS SECTION === */
.steps-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    position: relative;
}
.steps-container::before {
    content: '';
    position: absolute;
    top: 75px; /* Adjust to be vertically centered on the images */
    left: 10%;
    right: 10%;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--primary-color), var(--primary-color) 6px, transparent 6px, transparent 12px);
    z-index: 0;
}
.step-item {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 1;
}
.step-item img {
    max-width: 100%;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-soft);
}
.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-image: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: -20px auto 1rem auto;
    border: 4px solid var(--background-color);
}

/* === TRENDS SECTION === */
.trends-section { background-color: var(--card-color); }
.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.trend-card {
    background-color: var(--surface-color);
}

/* === COMPARISON SECTION === */
.table-container {
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}
th, td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--card-color);
}
th {
    background-color: var(--card-color);
    font-weight: 600;
}
tbody tr:last-child td {
    border-bottom: none;
}
tbody tr:hover {
    background-color: #f0f9ff; /* Sky 50 */
}
td:nth-child(2) { font-weight: 500; }

/* === FAQ SECTION === */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--card-color);
}
.faq-item summary {
    padding: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none; /* Removes default marker */
    position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 1.5rem;
    font-size: 2rem;
    color: var(--primary-color);
    transition: transform 0.2s;
}
.faq-item[open] summary::after {
    transform: rotate(45deg);
}
.faq-item p {
    padding: 0 1.5rem 1.5rem 1.5rem;
    border-top: 1px solid var(--card-color);
    margin-top: -0.5rem;
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === CONTACT SECTION === */
.contact-section { background-color: var(--surface-color); }
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.contact-info ul {
    margin-top: 2rem;
    line-height: 2;
}
.contact-info li {
    color: var(--muted-color);
}

/* === FOOTER === */
.footer {
    background-color: var(--text-color);
    color: var(--card-color);
    padding-top: 4rem;
}
.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 4rem;
}
.footer-col h4 {
    color: white;
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}
.footer-col p {
    color: var(--muted-color);
    max-width: 300px;
}
.footer-col ul li {
    margin-bottom: 0.75rem;
}
.footer-col a {
    color: var(--muted-color);
}
.footer-col a:hover {
    color: var(--primary-color);
}
.footer-bottom {
    background-color: #020617; /* Slate 950 */
    padding: 1.5rem 0;
    text-align: center;
}
.footer-bottom p {
    font-size: 0.9rem;
    color: var(--muted-color);
    margin: 0;
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .nav { display: none; }
    .mobile-nav-toggle {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        z-index: 1001;
    }
    .mobile-nav-toggle span {
        display: block;
        width: 25px;
        height: 3px;
        background-color: var(--text-color);
        margin: 5px 0;
        transition: all 0.3s;
    }
    
    .nav.active {
        display: flex;
        position: absolute;
        top: 80px;
        right: 20px;
        background: var(--surface-color);
        box-shadow: var(--shadow-medium);
        border-radius: var(--border-radius);
        flex-direction: column;
        width: 250px;
        padding: 1rem;
    }
    .nav.active ul {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-content p { margin: 0 auto 2rem auto; }
    .hero-buttons { justify-content: center; }
    .hero-image { grid-row: 1; margin-bottom: 2rem; }

    .problem-solution-grid { grid-template-columns: 1fr; }
    .content-container { grid-template-columns: 1fr; }
    .content-section.reversed .content-text,
    .content-section.reversed .content-image { grid-column: 1; }
    .content-image { margin-top: 2rem; }
    .content-section.reversed .content-image { order: -1; }

    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-container { flex-direction: column; align-items: center; gap: 3rem; }
    .steps-container::before { display: none; }
    
    .contact-container { grid-template-columns: 1fr; }
    .contact-map { margin-top: 2rem; }

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

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    section { padding: 4rem 0; }
    
    .header .btn { display: none; }

    .logos-container { justify-content: center; }

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

    .footer-container { grid-template-columns: 1fr; }
    .footer-col { text-align: center; }
    .footer-col p { margin-left: auto; margin-right: auto; }
}

/* Scroll Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}