/* styles.css */

.topbar-inner {
    padding: 0 20px;
}

:root {
    --bg: #0b1020;
    --bg-light: #111729;
    --bg-lighter: #161d30;
    --accent: #2d6cdf;
    --accent-soft: rgba(45,108,223,0.12);
    --text: #f5f7ff;
    --text-muted: #a5b0d0;
    --border: #252c40;
    --danger: #ff4b6a;
    --radius: 10px;
    --shadow-soft: 0 18px 40px rgba(0,0,0,0.45);
    --shadow-card: 0 14px 30px rgba(0,0,0,0.35);
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html, body {
    margin: 0;
    padding: 0;
    background: radial-gradient(circle at top, #1b2340 0, #050712 55%, #020308 100%);
    color: var(--text);
    font-family: var(--font-main);
}

body {
    min-height: 100vh;
}

/* Layout */

.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Topbar */

.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: linear-gradient(to bottom, rgba(5,7,18,0.92), rgba(5,7,18,0.75));
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: var(--text);
}

.logo img {
    height: 28px;
    width: auto;
}

.nav {
    display: flex;
    gap: 1.2rem;
    font-size: 0.9rem;
}

.nav a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.3rem 0;
    position: relative;
}

.nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -0.2rem;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.2s ease;
}

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

.nav a:hover::after {
    width: 100%;
}

/* Hero */

.hero {
    padding: 4.5rem 0 3.5rem;
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 2.4rem;
    line-height: 1.15;
    margin: 0 0 1rem;
}

.hero-sub {
    margin: 0 0 1.5rem;
    color: var(--text-muted);
    max-width: 32rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.hero-bullets {
    list-style: none;
    padding: 0;
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.hero-bullets li::before {
    content: "• ";
    color: var(--accent);
}

.hero-visual img {
    width: 100%;
    border-radius: 18px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.06);
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1.2rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #2d6cdf, #4f8dff);
    color: #fff;
    box-shadow: 0 12px 30px rgba(45,108,223,0.45);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 40px rgba(45,108,223,0.6);
}

.btn-secondary {
    background: rgba(255,255,255,0.04);
    color: var(--text);
    border-color: rgba(255,255,255,0.12);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.08);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: rgba(255,255,255,0.08);
}

.btn-ghost:hover {
    color: var(--text);
    border-color: rgba(255,255,255,0.18);
}

/* Sections */

.section {
    padding: 3.5rem 0;
}

.section-light {
    background: radial-gradient(circle at top, #151c33 0, #070a16 60%, #050712 100%);
}

.section-highlight {
    background: linear-gradient(135deg, #1b2440, #111729);
}

.section h2 {
    font-size: 1.7rem;
    margin-bottom: 0.75rem;
}

.section-lead {
    color: var(--text-muted);
    max-width: 40rem;
}

/* Cards */

.cards-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background: rgba(10,14,30,0.95);
    border-radius: var(--radius);
    padding: 1.3rem 1.2rem 1.4rem;
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: var(--shadow-card);
}

.card img {
    width: 100%;
    border-radius: 12px;
    margin-bottom: 0.8rem;
}

.card h3 {
    margin: 0 0 0.4rem;
    font-size: 1.1rem;
}

.card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Two-column */

.two-col {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 2.5rem;
    align-items: flex-start;
}

/* Box */

.box {
    background: rgba(10,14,30,0.95);
    border-radius: var(--radius);
    padding: 1.4rem 1.3rem;
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: var(--shadow-card);
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Checklist */

.checklist {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.checklist li {
    position: relative;
    padding-left: 1.4rem;
    margin-bottom: 0.4rem;
}

.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: #4ade80;
    font-size: 0.9rem;
}

/* Grid features */

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.feature {
    background: rgba(10,14,30,0.9);
    border-radius: var(--radius);
    padding: 1.2rem 1.1rem;
    border: 1px solid rgba(255,255,255,0.05);
    box-shadow: 0 10px 24px rgba(0,0,0,0.35);
}

.feature h3 {
    margin: 0 0 0.4rem;
    font-size: 1.05rem;
}

.feature p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.93rem;
}

/* Architecture image */

.architecture-image img {
    width: 100%;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: var(--shadow-soft);
}

/* Pilotfirmen */

.pilot-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 2.5rem;
    align-items: center;
}

.pilot-text .section-lead {
    margin-bottom: 1rem;
}

.pilot-image img {
    width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.08);
}

/* FAQ */

.faq-list {
    margin-top: 1.5rem;
}

details {
    background: rgba(10,14,30,0.9);
    border-radius: var(--radius);
    padding: 0.8rem 1rem;
    border: 1px solid rgba(255,255,255,0.06);
    margin-bottom: 0.7rem;
}

details summary {
    cursor: pointer;
    font-weight: 500;
}

details p {
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.93rem;
}

/* Kontakt */

.contact-form {
    display: grid;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.contact-form label {
    display: grid;
    gap: 0.25rem;
    font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
    background: rgba(5,7,18,0.9);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.08);
    padding: 0.5rem 0.6rem;
    color: var(--text);
    font-family: var(--font-main);
    font-size: 0.9rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 1px rgba(45,108,223,0.4);
}

.contact-info {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.contact-info a {
    color: var(--accent);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* Footer */

.footer {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 1.2rem 0 1.5rem;
    background: rgba(3,4,10,0.95);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

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

/* Responsive */

@media (max-width: 900px) {
    .hero-inner,
    .two-col,
    .pilot-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero {
        padding-top: 3.5rem;
    }

    .nav {
        display: none; /* für MVP: später Mobile-Navigation ergänzen */
    }

    .topbar-inner {
        justify-content: center;
    }
}

@media (max-width: 600px) {
    .hero-text h1 {
        font-size: 2rem;
    }

    .section {
        padding: 2.8rem 0;
    }
}