/*
 * korell.org - Stylesheet
 * Migration von WordPress zu statischem HTML
 * 
 * Created: 04.12.2025, 21:45 - Initiale Erstellung AP 1
 * Modified: 04.12.2025, 22:30 - Literaturverzeichnis padding-left erhöht (3rem)
 * Modified: 05.12.2025, 10:05 - Cards überlappen Slider (margin-top: -70px auf container)
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Colors */
    --color-primary: #3498db;
    --color-primary-dark: #2980b9;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-background: #ffffff;
    --color-footer: #2c3e50;
    --color-footer-text: #ffffff;
    --color-border: #e0e0e0;
    
    /* Typography */
    --font-heading: 'Merriweather', Georgia, serif;
    --font-body: 'Source Sans Pro', 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 70px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
}

ul, ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.site-header {
    background: var(--color-background);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.site-logo:hover {
    color: var(--color-primary);
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
    margin: 0;
}

.nav-menu a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-primary);
    background: rgba(52, 152, 219, 0.1);
}

.nav-current {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
    border-bottom: 2px solid var(--color-primary);
    cursor: default;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.hamburger span {
    width: 100%;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   PAGE HEADER (Unterseiten)
   ============================================ */
.page-header {
    background: var(--color-primary);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.page-header h1 {
    color: var(--color-footer-text);
    margin: 0;
    font-size: 2rem;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    flex: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    width: 100%;
}

.content-section {
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   SLIDER (Startseite)
   ============================================ */
.slider-container {
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    overflow: hidden;
    background: #1a1a1a;
}

.slider {
    position: relative;
    width: 100%;
    aspect-ratio: 1400 / 503;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-title {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.6);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.slider-dots {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-xs);
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slider-dot:hover,
.slider-dot.active {
    background: white;
    transform: scale(1.2);
}

/* ============================================
   CARDS (Startseite)
   ============================================ */
.cards-section {
    padding: 0 var(--spacing-md) var(--spacing-xl);
    background: var(--color-background);
}

.cards-container {
    max-width: var(--max-width);
    margin: -70px auto 0;
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.card {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    background: var(--color-primary-dark);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-sm);
}

.card-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: white;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-text {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
    flex-grow: 1;
}

.card-button {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.85rem;
    transition: background var(--transition-fast);
}

.card-button:hover {
    background: rgba(255, 255, 255, 0.3);
    color: white;
}

/* ============================================
   WELCOME SECTION (Startseite)
   ============================================ */
.welcome-section {
    max-width: 800px;
    margin: var(--spacing-xl) auto;
    padding: 0 var(--spacing-md);
}

.welcome-section h2 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.welcome-signature {
    margin-top: var(--spacing-lg);
    font-style: italic;
    color: var(--color-text-light);
}

/* ============================================
   LEBENSLAUF (CV)
   ============================================ */
.cv-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-xl);
}

.cv-sidebar {
    border-right: 1px solid var(--color-border);
    padding-right: var(--spacing-lg);
}

.cv-portrait {
    width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.cv-section {
    margin-bottom: var(--spacing-lg);
}

.cv-section h3 {
    color: var(--color-primary);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-primary);
}

.cv-section p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.cv-main h2 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.cv-entry {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--color-primary);
}

.cv-entry-date {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.9rem;
}

.cv-entry-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin: var(--spacing-xs) 0;
    text-transform: uppercase;
}

.cv-entry-company {
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.cv-entry-description {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.cv-download {
    margin-top: var(--spacing-lg);
}

.cv-download a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background var(--transition-fast);
}

.cv-download a:hover {
    background: var(--color-primary-dark);
    color: white;
}

/* ============================================
   DISSERTATION
   ============================================ */
.dissertation-content {
    max-width: 800px;
    margin: 0 auto;
}

.dissertation-title {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-style: italic;
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(52, 152, 219, 0.05);
    border-radius: var(--radius-md);
}

.dissertation-meta {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-light);
}

.dissertation-section {
    margin-bottom: var(--spacing-xl);
}

.dissertation-section h2 {
    color: var(--color-primary);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-border);
}

.dissertation-publication {
    background: rgba(52, 152, 219, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    font-style: italic;
}

.literature-list {
    list-style: none;
    margin-left: 0;
}

.literature-list li {
    margin-bottom: var(--spacing-sm);
    padding-left: 3rem;
    position: relative;
    font-size: 0.9rem;
}

.literature-list li::before {
    content: attr(data-ref);
    position: absolute;
    left: 0;
    font-weight: 600;
    color: var(--color-primary);
}

/* ============================================
   CRANIO-SACRAL
   ============================================ */
.cranio-content {
    max-width: 800px;
    margin: 0 auto;
}

.cranio-section {
    margin-bottom: var(--spacing-xl);
}

.cranio-section h2 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.cranio-section h3 {
    color: var(--color-text);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.cranio-image {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.cranio-image img {
    max-width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
}

.cranio-image figcaption {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: italic;
}

.indications-list {
    column-count: 2;
    column-gap: var(--spacing-lg);
    list-style: none;
    margin-left: 0;
}

.indications-list li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
    break-inside: avoid;
}

.indications-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* ============================================
   PHOTO GALLERY (Filmstreifen)
   ============================================ */
.gallery-container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Main Image Display */
.gallery-main {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #1a1a1a;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.gallery-main img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-card);
}

.gallery-nav:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.gallery-nav svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-text);
    stroke-width: 2;
    fill: none;
}

.gallery-prev {
    left: var(--spacing-md);
}

.gallery-next {
    right: var(--spacing-md);
}

/* Thumbnail Strip */
.gallery-strip-container {
    position: relative;
    padding: 0 var(--spacing-xl);
}

.gallery-strip {
    display: flex;
    gap: var(--spacing-xs);
    overflow-x: auto;
    padding: var(--spacing-sm) 0;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-border);
}

.gallery-strip::-webkit-scrollbar {
    height: 6px;
}

.gallery-strip::-webkit-scrollbar-track {
    background: var(--color-border);
    border-radius: 3px;
}

.gallery-strip::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 3px;
}

.gallery-thumb {
    flex-shrink: 0;
    width: 80px;
    height: 60px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 3px solid transparent;
    transition: all var(--transition-fast);
    opacity: 0.7;
}

.gallery-thumb:hover {
    opacity: 1;
    border-color: var(--color-primary-dark);
}

.gallery-thumb.active {
    opacity: 1;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-strip-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.gallery-strip-nav:hover {
    background: var(--color-primary-dark);
}

.gallery-strip-nav svg {
    width: 16px;
    height: 16px;
    stroke: white;
    stroke-width: 2;
    fill: none;
}

.gallery-strip-prev {
    left: 0;
}

.gallery-strip-next {
    right: 0;
}

/* Gallery Config (for JS) */
.gallery-container {
    --gallery-autoplay: 1;
    --gallery-interval: 4000;
}

/* ============================================
   LIEGETRIKE
   ============================================ */
.liegetrike-content {
    max-width: 800px;
    margin: 0 auto;
}

.liegetrike-images {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.liegetrike-images.single {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.liegetrike-images img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
}

.liegetrike-video {
    margin: var(--spacing-xl) 0;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
}

.liegetrike-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ============================================
   LEGAL PAGES (Impressum, Datenschutz)
   ============================================ */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-section {
    margin-bottom: var(--spacing-lg);
}

.legal-section h2 {
    color: var(--color-primary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.legal-section h3 {
    font-size: 1.1rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.legal-address {
    font-style: normal;
    line-height: 1.8;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--color-footer);
    color: var(--color-footer-text);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-main {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-contact {
    text-align: center;
}

.footer-contact a {
    color: var(--color-footer-text);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin: var(--spacing-xs) var(--spacing-sm);
    transition: opacity var(--transition-fast);
}

.footer-contact a:hover {
    opacity: 0.8;
    color: var(--color-footer-text);
}

.footer-contact svg {
    width: 20px;
    height: 20px;
}

.footer-links {
    text-align: right;
}

.footer-links a {
    color: var(--color-footer-text);
    display: block;
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-footer-text);
}

.footer-copyright {
    text-align: center;
    padding-top: var(--spacing-md);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .cards-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cv-container {
        grid-template-columns: 250px 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .footer-links {
        text-align: center;
    }
    
    .footer-links a {
        display: inline-block;
        margin: 0 var(--spacing-sm);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    /* Mobile Navigation */
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-background);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a,
    .nav-current {
        display: block;
        padding: var(--spacing-sm);
        text-align: center;
        border-radius: var(--radius-sm);
    }
    
    /* Slider */
    .slide-title {
        font-size: 1.5rem;
        top: var(--spacing-sm);
        left: var(--spacing-sm);
    }
    
    .slider-dots {
        left: var(--spacing-sm);
        bottom: var(--spacing-sm);
    }
    
    /* Cards */
    .cards-container {
        grid-template-columns: 1fr;
    }
    
    /* CV */
    .cv-container {
        grid-template-columns: 1fr;
    }
    
    .cv-sidebar {
        border-right: none;
        padding-right: 0;
        border-bottom: 1px solid var(--color-border);
        padding-bottom: var(--spacing-lg);
    }
    
    .cv-portrait {
        max-width: 200px;
        margin: 0 auto var(--spacing-md);
    }
    
    /* Indications */
    .indications-list {
        column-count: 1;
    }
    
    /* Liegetrike */
    .liegetrike-images {
        grid-template-columns: 1fr;
    }
    
    /* Gallery */
    .gallery-nav {
        width: 40px;
        height: 40px;
    }
    
    .gallery-prev {
        left: var(--spacing-xs);
    }
    
    .gallery-next {
        right: var(--spacing-xs);
    }
    
    .gallery-thumb {
        width: 60px;
        height: 45px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .slider {
        aspect-ratio: 16 / 10;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.text-primary {
    color: var(--color-primary);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .slider-container,
    .cards-section,
    .gallery-nav,
    .gallery-strip-nav {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}