/* ============================================
   Lorenz Muck — Controlling · BI · KI
   Style Sheet v1
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Bahnschrift', 'Bierstadt', 'Segoe UI', system-ui, sans-serif;
    color: #1A1A2E;
    background: #FFFFFF;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* --- Colors --- */
:root {
    --clr-bg: #FFFFFF;
    --clr-text: #1A1A2E;
    --clr-text-light: #4A4A5A;
    --clr-accent-blue: #00D4FF;
    --clr-accent-yellow: #CCFF00;
    --clr-accent-blue-hover: #00B8E0;
    --clr-bg-light: #F5F9FF;
    --clr-bg-yellow: #F8FFE3;
    --clr-border: #E2E8F0;
    --clr-footer: #0F0F1A;
    --max-width: 1200px;
    --nav-height: 72px;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 600;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    margin-bottom: 1.5rem;
}

h3 {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
    color: var(--clr-text-light);
    font-size: 1.125rem;
}

a {
    color: var(--clr-accent-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--clr-accent-blue-hover);
}

/* --- Container --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--clr-accent-blue);
    color: #1A1A2E;
}

.btn-primary:hover {
    background: var(--clr-accent-yellow);
    color: #1A1A2E;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.25);
}

.btn-outline {
    background: transparent;
    color: var(--clr-accent-blue);
    border: 2px solid var(--clr-accent-blue);
}

.btn-outline:hover {
    background: var(--clr-accent-blue);
    color: #1A1A2E;
    transform: translateY(-2px);
}

/* --- Navigation --- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--clr-border);
    z-index: 1000;
    display: flex;
    align-items: center;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--clr-text);
    letter-spacing: -0.02em;
    text-decoration: none;
}

.nav-logo span {
    color: var(--clr-accent-blue);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--clr-text);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    text-decoration: none;
    padding-bottom: 2px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--clr-accent-blue);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a.nav-cta {
    background: var(--clr-accent-yellow);
    color: #1A1A2E;
    padding: 0.5rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
}

.nav-links a.nav-cta:hover {
    background: var(--clr-accent-blue);
    color: #1A1A2E;
}

.nav-links a.nav-cta::after {
    display: none;
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--clr-text);
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* --- Hero Section --- */
.hero {
    padding: calc(var(--nav-height) + 4rem) 0 4rem;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

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

.hero-content h1 {
    margin-bottom: 1.2rem;
}

.hero-content .subtitle {
    font-size: 1.25rem;
    color: var(--clr-text-light);
    margin-bottom: 2rem;
    line-height: 1.5;
}

.hero-content .highlight {
    color: var(--clr-accent-blue);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.hero-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 24px 80px rgba(0, 212, 255, 0.12);
}

/* --- Section Styles --- */
section {
    padding: 5rem 0;
}

.section-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--clr-accent-blue);
    margin-bottom: 0.5rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--clr-text-light);
    max-width: 700px;
    margin-bottom: 3rem;
}

.bg-light {
    background: var(--clr-bg-light);
}

.bg-yellow {
    background: var(--clr-bg-yellow);
}

/* --- Card Grid --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--clr-bg);
    border: 1px solid var(--clr-border);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
    border-color: var(--clr-accent-blue);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

.card h3 {
    margin-bottom: 0.75rem;
}

.card p {
    font-size: 1rem;
    margin-bottom: 0;
}

/* --- Process Steps --- */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0;
    counter-reset: step;
}

.process-step {
    padding: 2rem 1.5rem;
    position: relative;
    counter-increment: step;
}

.process-step::before {
    content: counter(step);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--clr-accent-blue);
    opacity: 0.3;
    display: block;
    margin-bottom: 0.5rem;
}

.process-step h3 {
    margin-bottom: 0.5rem;
}

.process-step p {
    font-size: 0.95rem;
}

/* --- Comparison Tables --- */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.comparison-col {
    padding: 2rem;
    border-radius: 12px;
}

.comparison-col.before {
    background: #FFF0F0;
    border: 1px solid #FFD4D4;
}

.comparison-col.after {
    background: #E8F9F4;
    border: 1px solid #B7E6D9;
}

.comparison-col h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.comparison-col ul {
    list-style: none;
}

.comparison-col li {
    padding: 0.5rem 0;
    font-size: 1rem;
    color: var(--clr-text-light);
    position: relative;
    padding-left: 1.5rem;
}

.comparison-col.before li::before {
    content: '✗';
    color: #E53E3E;
    position: absolute;
    left: 0;
}

.comparison-col.after li::before {
    content: '✓';
    color: #38A169;
    position: absolute;
    left: 0;
}

/* --- CTA Section --- */
.cta-section {
    text-align: center;
    padding: 5rem 0;
    background: var(--clr-bg-light);
}

.cta-section h2 {
    margin-bottom: 1rem;
}

.cta-section p {
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.15rem;
}

/* --- Contact Form --- */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 1px solid var(--clr-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s ease;
    background: var(--clr-bg);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--clr-accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

/* --- Footer --- */
footer {
    background: var(--clr-footer);
    color: rgba(255, 255, 255, 0.6);
    padding: 3rem 0;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

footer a {
    color: rgba(255, 255, 255, 0.7);
}

footer a:hover {
    color: var(--clr-accent-blue);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

/* --- Page Hero (inner pages) --- */
.page-hero {
    padding: calc(var(--nav-height) + 3rem) 0 2rem;
    text-align: center;
    background: var(--clr-bg-light);
}

.page-hero h1 {
    margin-bottom: 0.75rem;
}

.page-hero .subtitle {
    max-width: 650px;
    margin: 0 auto;
    font-size: 1.2rem;
}

/* --- Content Sections --- */
.content-section {
    padding: 4rem 0;
}

.content-section h2 {
    margin-bottom: 1.5rem;
}

.content-section h3 {
    margin-top: 2rem;
}

.content-section ul,
.content-section ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--clr-text-light);
    font-size: 1.1rem;
}

.content-section li {
    margin-bottom: 0.5rem;
}

/* --- Maturity Levels / Level Cards --- */
.level-list {
    display: grid;
    gap: 1rem;
}

.level-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--clr-border);
    transition: all 0.3s ease;
}

.level-item:hover {
    border-color: var(--clr-accent-blue);
    transform: translateX(4px);
}

.level-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--clr-accent-blue);
    min-width: 40px;
    opacity: 0.6;
}

.level-item h3 {
    margin-bottom: 0.3rem;
}

.level-item p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* --- KI Levels --- */
.ki-level {
    padding: 2.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid var(--clr-border);
    transition: all 0.3s ease;
}

.ki-level:hover {
    border-color: var(--clr-accent-blue);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.ki-level .level-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 0.5rem;
}

.ki-level h3 {
    display: flex;
    align-items: center;
}

/* --- Table Styles --- */
.skill-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 1rem;
}

.skill-table th,
.skill-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--clr-border);
}

.skill-table th {
    background: var(--clr-bg-light);
    font-weight: 600;
    color: var(--clr-text);
}

.skill-table td {
    color: var(--clr-text-light);
}

.skill-table tr:hover td {
    background: var(--clr-bg-light);
}

/* --- Page Content Width --- */
.page-content {
    max-width: 900px;
    margin: 0 auto;
}

/* --- Hero Inner (pages with image side) --- */
.hero-inner {
    padding: calc(var(--nav-height) + 3rem) 0 2rem;
}

.hero-inner .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-inner h1 {
    margin-bottom: 1rem;
}

.hero-inner .subtitle {
    font-size: 1.2rem;
    color: var(--clr-text-light);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .hero .container,
    .hero-inner .container,
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .hero-image img {
        max-width: 300px;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--clr-bg);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--clr-border);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    section {
        padding: 3rem 0;
    }

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

    .process-steps {
        grid-template-columns: 1fr;
    }

    footer .container {
        flex-direction: column;
        text-align: center;
    }
}

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

    .hero {
        padding-top: calc(var(--nav-height) + 2rem);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}