/* ==========================================================================
Tuleja Retail Services UG (haftungsbeschränkt) – One-Pager
Statisch, mobilfreundlich, ohne externe Abhängigkeiten.
========================================================================== */

:root {
--color-primary: #0b4f6c;
--color-primary-dark: #072f40;
--color-accent: #01baef;
--color-accent-soft: #e1f5fc;
--color-bg: #ffffff;
--color-bg-alt: #f2f8fa;
--color-text: #22333b;
--color-muted: #5d6f77;
--color-border: #d9e7ed;
--container-width: 1080px;
--radius-lg: 18px;
--shadow-sm: 0 2px 10px rgba(7, 47, 64, 0.07);
}

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

html {
scroll-behavior: smooth;
scroll-padding-top: 5.5rem;
}

body {
margin: 0;
font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial,
sans-serif;
line-height: 1.6;
color: var(--color-text);
background-color: var(--color-bg);
-webkit-font-smoothing: antialiased;
}

svg {
display: block;
max-width: 100%;
}

.container {
width: min(100% - 2.5rem, var(--container-width));
margin-inline: auto;
}

/* Sprunglink für Tastaturnutzung */
.skip-link {
position: absolute;
top: 0;
left: -999px;
z-index: 100;
padding: 0.6rem 1rem;
border-radius: 0 0 var(--radius-lg) 0;
background-color: var(--color-accent);
color: var(--color-primary-dark);
font-weight: 700;
text-decoration: none;
}

.skip-link:focus {
left: 0;
}

/* Kopfzeile */
.site-header {
position: sticky;
top: 0;
z-index: 50;
border-bottom: 1px solid var(--color-border);
background-color: rgba(255, 255, 255, 0.94);
-webkit-backdrop-filter: blur(8px);
backdrop-filter: blur(8px);
}

.header-inner {
display: flex;
flex-wrap: wrap;
align-items: center;
justify-content: space-between;
gap: 0.25rem 1.25rem;
padding-block: 0.6rem;
}

.brand {
display: inline-flex;
align-items: center;
gap: 0.5rem;
color: var(--color-primary-dark);
font-size: 1.15rem;
font-weight: 800;
text-decoration: none;
}

.brand-icon {
width: 1.6rem;
height: 1.6rem;
color: var(--color-accent);
}

.site-nav {
display: flex;
flex-wrap: wrap;
gap: 0.25rem 1.25rem;
}

.site-nav a {
padding: 0.4rem 0.2rem;
color: var(--color-text);
font-size: 0.95rem;
font-weight: 600;
text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
color: var(--color-primary);
}

/* Hero */
.hero {
padding: clamp(3.5rem, 10vw, 6.5rem) 0;
color: #ffffff;
background:
radial-gradient(900px 480px at 85% -10%, rgba(1, 186, 239, 0.4), transparent
60%),
linear-gradient(160deg, var(--color-primary-dark) 0%, var(--color-primary)
100%);
}

.eyebrow {
margin: 0 0 0.75rem;
color: var(--color-accent);
font-size: 0.8rem;
font-weight: 800;
letter-spacing: 0.16em;
text-transform: uppercase;
}

.hero h1 {
margin: 0 0 1rem;
max-width: 24ch;
font-size: clamp(1.9rem, 5.5vw, 3.25rem);
line-height: 1.15;
letter-spacing: -0.01em;
}

.lead {
margin: 0 0 2rem;
max-width: 54ch;
color: rgba(255, 255, 255, 0.88);
font-size: clamp(1.05rem, 2.5vw, 1.25rem);
}

.hero-actions {
display: flex;
flex-wrap: wrap;
gap: 0.75rem;
}

.button {
display: inline-flex;
align-items: center;
justify-content: center;
padding: 0.8rem 1.5rem;
border: 2px solid transparent;
border-radius: 999px;
font-size: 1rem;
font-weight: 700;
text-decoration: none;
transition:
background-color 0.2s ease,
border-color 0.2s ease,
color 0.2s ease,
transform 0.2s ease;
}

.button-primary {
background-color: var(--color-accent);
color: var(--color-primary-dark);
}

.button-primary:hover,
.button-primary:focus-visible {
background-color: #ffffff;
transform: translateY(-2px);
}

.button-ghost {
border-color: rgba(255, 255, 255, 0.6);
color: #ffffff;
}

.button-ghost:hover,
.button-ghost:focus-visible {
border-color: #ffffff;
background-color: rgba(255, 255, 255, 0.12);
}

/* Abschnitte */
.section {
padding: clamp(3rem, 8vw, 5rem) 0;
}

.section-alt {
background-color: var(--color-bg-alt);
}

.section h2 {
margin: 0 0 0.6rem;
color: var(--color-primary-dark);
font-size: clamp(1.5rem, 4vw, 2.25rem);
line-height: 1.2;
}

.section-intro {
margin: 0 0 2rem;
max-width: 60ch;
color: var(--color-muted);
}

/* Leistungskarten: Beschreibung per Tipp */
.card-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
gap: 1rem;
}

.service-card {
overflow: hidden;
background-color: var(--color-bg);
border: 1px solid var(--color-border);
border-radius: var(--radius-lg);
box-shadow: var(--shadow-sm);
}

.service-card summary {
display: flex;
align-items: center;
gap: 0.85rem;
padding: 1.1rem 1.25rem;
color: var(--color-primary-dark);
font-weight: 700;
cursor: pointer;