:root {
    --hts-blue-dark: #0F2535;
    --hts-mint: #55C2B4;
    --bg-light: #F4F5F7;
    --text-dark: #22262B;
    --text-muted: #9BA4AF;
    --border-soft: #E0E3E7;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg-light);
    color: var(--text-dark);
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header & Navigation */

header {
    background: #ffffff;
    border-bottom: 1px solid var(--border-soft);
    padding: 12px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 50px;
}

.logo-text-main {
    font-weight: 700;
    letter-spacing: 0.06em;
    font-size: 16px;
    text-transform: uppercase;
}

.logo-text-sub {
    font-size: 11px;
    color: #777777;
    text-transform: uppercase;
}

nav a {
    margin-left: 24px;
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

nav a:hover {
    color: var(--hts-mint);
}

/* Hero */

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    padding: 60px 40px 70px;
    gap: 40px;
    background: linear-gradient(135deg, #ffffff 0%, #f7fbfb 40%, #f4f5f7 100%);
}

.hero-text h1 {
    font-size: 32px;
    margin: 0 0 16px;
    color: var(--hts-blue-dark);
}

.hero-text p {
    margin: 0 0 24px;
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn-primary {
    background: var(--hts-blue-dark);
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary:hover {
    background: #16344a;
}

.btn-secondary {
    border: 1px solid var(--border-soft);
    padding: 12px 20px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--hts-blue-dark);
    background: #ffffff;
    display: inline-block;
}

.hero-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    min-height: 260px;
    background:
        linear-gradient(135deg, rgba(15,37,53,0.78), rgba(85,194,180,0.7)),
        url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?auto=format&fit=crop&w=1200&q=80')
        center/cover no-repeat;
}

.hero-image-card {
    position: absolute;
    bottom: 18px;
    left: 18px;
    background: rgba(255,255,255,0.95);
    border-radius: 12px;
    padding: 10px 14px;
    max-width: 240px;
    font-size: 12px;
    color: var(--text-dark);
}

.hero-image-card strong {
    font-size: 13px;
    display: block;
    margin-bottom: 4px;
    color: var(--hts-blue-dark);
}

/* Sections generell */

.section {
    padding: 60px 40px;
    max-width: 1100px;
    margin: 0 auto;
}

.section h2 {
    font-size: 24px;
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--hts-blue-dark);
}

.section p.section-intro {
    margin-top: 0;
    margin-bottom: 32px;
    color: var(--text-muted);
    max-width: 620px;
    line-height: 1.6;
}

/* Cards, Bubbles */

.card {
    background: #ffffff;
    border-radius: 16px;
    padding: 20px 22px;
    border: 1px solid var(--border-soft);
    box-shadow: 0 4px 12px rgba(15,37,53,0.04);
}

.contact-card {
    max-width: 500px;
}

.contact-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-muted);
}

.contact-card-button {
    margin-top: 10px;
}

.bubble-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 20px;
}

.bubble {
    background: #ffffff;
    padding: 18px 18px 16px;
    width: calc(33.33% - 14px);
    min-width: 220px;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(15,37,53,0.05);
    font-size: 15px;
    font-weight: 600;
    text-align: left;
    border: 1px solid transparent;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.bubble:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(15,37,53,0.12);
    border-color: var(--hts-mint);
}

/* Kontaktformular */

.contact-section {
    background: #ffffff;
    border-radius: 16px;
}

.contact-form {
    max-width: 700px;
    padding: 20px 0 0 0;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 220px;
}

.form-group.full-width {
    flex: 1 0 100%;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 6px;
}

input, textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border-soft);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    background: #ffffff;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--hts-mint);
    box-shadow: 0 0 0 3px rgba(85,194,180,0.2);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit-button {
    margin-top: 4px;
}

/* Footer */

footer {
    background: var(--hts-blue-dark);
    color: #ffffff;
    padding: 26px 40px 22px;
    font-size: 14px;
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 20px;
}

.footer-bottom {
    margin-top: 14px;
    font-size: 11px;
    color: #9fb2c2;
}

/* Responsive */

@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 32px 20px 40px;
    }

    header {
        padding: 10px 20px;
    }

    .section {
        padding: 40px 20px;
    }

    .bubble {
        width: calc(50% - 10px);
    }
}

@media (max-width: 600px) {
    .bubble {
        width: 100%;
    }

    nav {
        display: none;
    }

    .form-row {
        flex-direction: column;
    }
}