/* =============================================================
   CK – KI für den Mittelstand | Design System
   Hell & Freundlich – Professionell meets Mittelstand
   ============================================================= */

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

:root {
    /* Farben – Hell, freundlich, vertrauenswürdig */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7F7FA;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F0F1F5;
    --accent: #0E7490;
    --accent-hover: #0C5F74;
    --accent-warm: #E8A020;
    --neutral-light: #F5F5F0;
    --neutral-mid: #8B92A0;
    --white: #FFFFFF;
    --text-primary: #1a1f2e;
    --text-secondary: #4B5563;
    --text-muted: #9CA3AF;
    --border: #E5E7EB;
    --border-light: #D1D5DB;

    /* Typografie */
    --font-display: 'Playfair Display', 'Georgia', serif;
    --font-body: 'DM Sans', 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    /* Skalierung */
    --h1: clamp(2.5rem, 5vw, 4.5rem);
    --h2: clamp(1.8rem, 3.5vw, 3rem);
    --h3: clamp(1.2rem, 2vw, 1.5rem);
    --body: 1.05rem;
    --small: 0.9rem;

    /* Abstände */
    --section-padding: clamp(4rem, 8vw, 7rem) 2rem;
    --container-max: 1200px;
    --gap: 2rem;

    /* Effekte */
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: var(--body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* === Navigation === */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0 2rem;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.logo em {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 700;
}

.logo span {
    color: var(--accent);
    font-weight: 400;
}

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

nav ul a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition);
}

nav ul a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}

nav ul a:hover,
nav ul a.active {
    color: var(--text-primary);
}

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

/* CTA-Button in der Navigation */
.nav-cta {
    background: var(--accent);
    color: var(--white) !important;
    padding: 0.55rem 1.4rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition);
}

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

.nav-cta:hover {
    background: var(--accent-hover);
    color: var(--white) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(14, 116, 144, 0.35);
}

/* Hamburger-Menü (mobil) */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
}

/* Fallback-Hintergrund (wird durch Canvas ersetzt wenn Frames vorhanden) */
.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(14, 116, 144, 0.04) 0%, transparent 55%),
        radial-gradient(ellipse at 70% 60%, rgba(232, 160, 32, 0.03) 0%, transparent 50%),
        #F7F7FA;
    z-index: 0;
}

/* Subtiles Raster-Muster */
.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Canvas für Scroll-Animation */
#hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    display: none; /* Wird durch JS aktiviert wenn Frames geladen */
}

/* === CK Logo-Intro Animation === */
.ck-intro {
    position: absolute;
    inset: 0;
    z-index: 2;
    background: radial-gradient(ellipse at 30% 50%, #1a1f2e 0%, #0d0d1a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    animation: ckIntroFadeOut 1.5s ease 4.5s forwards;
}

@keyframes ckIntroFadeOut {
    to { opacity: 0; visibility: hidden; }
}

/* Mitte blendet etwas früher aus */
.ck-center {
    animation: ckCenterFade 1s ease 3.5s forwards;
}

.ck-accent-bar {
    animation: ckBarGrow 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards,
               ckCenterFade 1s ease 4.5s forwards;
}

.ck-particles .ck-particle {
    animation: ckParticleFloat 4s ease-in-out infinite;
}

@keyframes ckCenterFade {
    to { opacity: 0; }
}

.ck-accent-bar {
    position: absolute;
    left: 80px;
    top: 10%;
    width: 4px;
    height: 0;
    background: var(--accent);
    border-radius: 2px;
}

@keyframes ckBarGrow {
    to { height: 80%; }
}

.ck-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

/* Monogramm CK */
.ck-monogram {
    position: relative;
    transform: scale(0);
    animation: ckMonoPop 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s forwards;
}

@keyframes ckMonoPop {
    to { transform: scale(1); }
}

.ck-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(200, 16, 46, 0.25), transparent 70%);
    opacity: 0;
    animation: ckGlow 1.5s ease 0.8s forwards;
}

@keyframes ckGlow {
    0% { opacity: 0; }
    50% { opacity: 0.6; }
    100% { opacity: 0.3; }
}

.ck-letter-c, .ck-letter-k {
    font-family: var(--font-display);
    font-size: clamp(80px, 12vw, 140px);
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: 8px;
    position: relative;
}

.ck-letter-k {
    color: var(--accent);
}

/* Trennlinie */
.ck-divider {
    width: 0;
    height: 2px;
    background: var(--accent);
    margin: 20px auto;
    opacity: 0.7;
    animation: ckDividerGrow 0.8s cubic-bezier(0.22, 1, 0.36, 1) 1.5s forwards;
}

@keyframes ckDividerGrow {
    to { width: 280px; }
}

/* Name */
.ck-name {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 52px);
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: 3px;
    opacity: 0;
    transform: translateY(40px);
    animation: ckSlideUp 0.8s ease 1.8s forwards;
}

/* Untertitel */
.ck-subtitle {
    font-family: var(--font-body);
    font-size: clamp(14px, 2vw, 24px);
    color: var(--accent-warm);
    letter-spacing: 5px;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(30px);
    animation: ckSlideUp 0.8s ease 2.2s forwards;
}

@keyframes ckSlideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Partikel */
.ck-particle {
    position: absolute;
    border-radius: 50%;
    background: var(--accent-warm);
    opacity: 0;
    animation: ckParticleFloat 4s ease-in-out infinite;
}

@keyframes ckParticleFloat {
    0% { opacity: 0; transform: translateY(0); }
    15% { opacity: 0.3; }
    85% { opacity: 0.3; }
    100% { opacity: 0; transform: translateY(-60px); }
}

/* Hero-Content über der Animation */
.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    opacity: 0;
    animation: ckContentAppear 1s ease 4.5s forwards;
}

@keyframes ckContentAppear {
    to { opacity: 1; }
}

.hero .tagline {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: #FFFFFF;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(0, 0, 0, 0.3);
    padding: 0.45rem 1.3rem;
    border-radius: 50px;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: var(--h1);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: #FFFFFF;
    text-shadow: 0 2px 30px rgba(0, 0, 0, 0.6);
}

.hero h1 .highlight {
    color: var(--accent);
}

.hero p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 0.9rem 2.4rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--accent);
    color: #FFFFFF;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(14, 116, 144, 0.3);
}

.btn-outline {
    border: 1.5px solid rgba(255, 255, 255, 0.6);
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    margin-left: 1rem;
}

.btn-outline:hover {
    border-color: #FFFFFF;
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Sektionen allgemein === */
section {
    padding: var(--section-padding);
}

.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: var(--h2);
    font-weight: 700;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.section-header h2 span {
    color: var(--accent);
}

.section-header p {
    color: var(--text-secondary);
    max-width: 550px;
    margin: 0 auto;
    font-size: 1.1rem;
}

.divider {
    width: 50px;
    height: 3px;
    background: var(--accent);
    margin: 1rem auto;
    border-radius: 2px;
}

/* === Leistungen === */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--gap);
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-light);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card .icon {
    font-size: 2rem;
    margin-bottom: 1.2rem;
    display: inline-block;
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: var(--h3);
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.service-card .tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    border: 1px solid rgba(14, 116, 144, 0.2);
    padding: 0.2rem 0.7rem;
    border-radius: 50px;
    margin-top: 1rem;
}

/* === Kunden / Logos === */
.clients {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.clients-label {
    text-align: center;
    font-family: var(--font-mono);
    font-size: var(--small);
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.clients-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
}

.client-item {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    opacity: 0.5;
    transition: opacity var(--transition);
    white-space: nowrap;
}

.client-item:hover {
    opacity: 1;
    color: var(--text-secondary);
}

/* === Statistiken === */
.stats {
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--gap);
    text-align: center;
}

.stat-item .number {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
}

.stat-item .number span {
    color: var(--accent);
}

.stat-item .label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.3rem;
}

/* === Über mich (About) === */
.about-section {
    background: var(--bg-primary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    width: 100%;
    aspect-ratio: 4 / 5;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

/* Dezenter Akzent-Rand */
.about-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent);
}

.about-text h2 {
    font-family: var(--font-display);
    font-size: var(--h2);
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.about-text h2 span {
    color: var(--accent);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    line-height: 1.8;
}

.about-text ul {
    list-style: none;
    margin: 1.5rem 0 2rem;
}

.about-text ul li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.about-text ul li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
}

/* === Timeline === */
.timeline-section {
    background: var(--bg-secondary);
}

.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-light);
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 0.6rem;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    transform: translateX(-4.5px);
}

.timeline-item .year {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timeline-item h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin: 0.3rem 0 0.4rem;
    color: var(--text-primary);
}

.timeline-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* === Kontakt === */
.contact {
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-item .icon {
    font-size: 1.3rem;
    min-width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Kontakt CTA-Box */
.contact-cta {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
}

.contact-cta h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.contact-cta p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* === CTA-Sektion === */
.cta-section {
    background: var(--bg-secondary);
    text-align: center;
    border-top: 1px solid var(--border);
}

.cta-section h2 {
    font-family: var(--font-display);
    font-size: var(--h2);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto 2rem;
}

/* === Footer === */
footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 3rem 2rem;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-left {
    color: var(--text-muted);
    font-size: var(--small);
}

.footer-right {
    display: flex;
    gap: 2rem;
}

.footer-right a {
    color: var(--text-muted);
    font-size: var(--small);
    transition: color var(--transition);
}

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

/* === Scroll-Reveal Animationen === */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Verzögerte Animationen für gestaffeltes Erscheinen */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* === Responsive === */

/* Tablet */
@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .about-image {
        max-width: 350px;
        margin: 0 auto;
    }

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

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

/* Mobil */
@media (max-width: 768px) {
    nav ul {
        display: none;
    }

    nav ul.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border);
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: clamp(2rem, 7vw, 2.8rem);
    }

    .hero p {
        font-size: 1.05rem;
    }

    .btn-group {
        flex-direction: column;
        align-items: center;
    }

    .btn-outline {
        margin-left: 0;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .clients-grid {
        gap: 2rem;
    }

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

/* Kleine Handys */
@media (max-width: 400px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}