/* ==========================================================================
   Dr. Dieter Kunzke - Psychotherapie Website
   Modern, elegant design for healthcare field
   ========================================================================== */

/* CSS Variables for easy customization */
:root {
    /* Colors - Soft, neutral palette for healthcare */
    --color-primary: #4a6b7a;        /* Muted blue-gray */
    --color-primary-dark: #3a5562;   /* Darker variant */
    --color-primary-light: #e8f0f3;  /* Very light background */
    --color-secondary: #7a8b94;      /* Soft gray-blue */
    --color-accent: #c9a66b;         /* Subtle gold for highlights */
    --color-accent-light: #f5f0e6;   /* Cream highlight background */
    
    --color-text: #3d4f5f;           /* Main text - soft dark */
    --color-text-light: #6b7c8a;     /* Secondary text */
    --color-text-muted: #9aa8b3;     /* Muted text */
    
    --color-bg: #fafbfc;             /* Main background */
    --color-bg-white: #ffffff;       /* White background */
    --color-bg-section: #f5f7f8;     /* Section background */
    
    --color-border: #e2e8ec;         /* Subtle borders */
    --color-border-light: #eef2f4;   /* Very light borders */
    
    /* Typography */
    --font-primary: 'Source Sans 3', 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Source Serif 4', 'Source Serif Pro', Georgia, 'Times New Roman', serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Layout */
    --container-max: 900px;
    --container-wide: 1100px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Shadows - very subtle */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.25rem; }
h2 { 
    font-size: 2rem;
    margin-top: var(--spacing-lg);
}
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

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

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

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

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    z-index: 10000;
    font-weight: 500;
}

.skip-link:focus {
    top: 0;
    outline: none;
}

/* Layout Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: var(--container-wide);
}

/* Header */
.header {
    background-color: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.header-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.header-subtitle {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

/* Navigation */
.nav {
    margin-top: var(--spacing-sm);
}

.nav-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs) var(--spacing-sm);
    list-style: none;
}

.nav-link {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    text-decoration: none;
}

.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

/* Navigation Close Button - hidden by default on desktop */
.nav-close {
    display: none;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--color-primary);
}

.nav-toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: currentColor;
    position: relative;
    transition: background-color var(--transition-fast);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    transition: transform var(--transition-fast);
}

.nav-toggle-icon::before {
    top: -7px;
}

.nav-toggle-icon::after {
    top: 7px;
}

/* Main Content */
.main {
    min-height: calc(100vh - 300px);
    padding: var(--spacing-xl) 0;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.page-title {
    font-size: 2rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    color: var(--color-text-light);
    font-size: 1.125rem;
}

/* Notice Box - For important information */
.notice-box {
    background-color: var(--color-accent-light);
    border-left: 4px solid var(--color-accent);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.notice-box p {
    margin-bottom: 0;
    color: var(--color-text);
    font-size: 1rem;
}

.notice-box p + p {
    margin-top: var(--spacing-xs);
}

/* Content Sections */
.content-section {
    margin-bottom: var(--spacing-xl);
}

.content-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 1.5rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-border-light);
}

/* Cards */
.card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.card-title {
    font-size: 1.25rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-sm);
}

/* Timeline for Vita page */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.timeline-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 10px;
    height: 10px;
    background-color: var(--color-primary);
    border-radius: 50%;
    transform: translateX(-4px);
}

.timeline-year {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-content {
    color: var(--color-text);
}

.timeline-content p {
    margin-bottom: var(--spacing-xs);
}

.timeline-content p:last-child {
    margin-bottom: 0;
}

/* Publications List */
.publications-list {
    list-style: none;
}

.publication-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.publication-item:last-child {
    border-bottom: none;
}

.publication-year {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
}

.publication-title {
    font-size: 1rem;
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: 0;
}

.publication-title a {
    color: var(--color-primary);
}

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

/* Links Sections */
.links-section {
    margin-bottom: var(--spacing-xl);
}

.links-section-title {
    font-size: 1.375rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-border-light);
}

.links-list {
    list-style: none;
    columns: 2;
    column-gap: var(--spacing-lg);
}

.links-list li {
    break-inside: avoid;
    margin-bottom: var(--spacing-xs);
    padding-left: 1.25rem;
    position: relative;
}

.links-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 0.875rem;
}

.links-list a {
    color: var(--color-primary);
}

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

.links-list .link-description {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 0.125rem;
}

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

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-bg-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* Honeypot field for spam protection */
.form-honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
}

/* Privacy Notice */
.privacy-notice {
    background-color: var(--color-bg-section);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: white;
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    text-decoration: none;
}

/* Downloads */
.downloads-list {
    list-style: none;
}

.download-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: box-shadow var(--transition-fast);
}

.download-item:hover {
    box-shadow: var(--shadow-md);
}

.download-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.25rem;
}

.download-content {
    flex: 1;
}

.download-title {
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.125rem;
}

.download-meta {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* Download Indicator for Publications */
.download-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-left: 0.5rem;
    padding: 0.125rem 0.5rem;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-decoration: none;
    white-space: nowrap;
}

.download-indicator::before {
    content: "⬇";
    font-size: 0.875rem;
}

.publication-title a:hover .download-indicator {
    background-color: var(--color-primary);
    color: white;
}

/* Footer */
.footer {
    background-color: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-sm);
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
}

.footer-nav a {
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

.footer-nav a:hover {
    color: var(--color-primary);
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Profilbild Styles */
.profile-section {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    width: 100%;
}

.profile-container {
    display: block;
    width: 120px;
    height: 120px;
}

.profile-image {
    display: block;
    width: 120px !important;
    height: 120px !important;
    max-width: 120px !important;
    max-height: 120px !important;
    border-radius: 50% !important;
    object-fit: cover;
    border: 3px solid var(--color-bg-white);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    margin: 0 auto;
}

.profile-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* Books Section */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.book-card {
    display: flex;
    gap: var(--spacing-md);
    background-color: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: box-shadow var(--transition-fast);
}

.book-card:hover {
    box-shadow: var(--shadow-md);
}

.book-cover {
    flex-shrink: 0;
    width: 80px;
}

.book-cover img {
    width: 100%;
    max-height: 120px;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.book-info {
    flex: 1;
}

.book-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.book-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.book-authors {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.book-meta {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    .book-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .book-cover {
        width: 100px;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-lg: 1.75rem;
    }
    
    h1 { font-size: 1.875rem; }
    h2 { 
        font-size: 1.625rem;
        margin-top: var(--spacing-md);
    }
    
    .header {
        padding: var(--spacing-md) 0;
    }
    
    .header-title {
        font-size: 1.5rem;
    }
    
    .nav-toggle {
        display: block;
        position: absolute;
        right: var(--spacing-md);
        top: 50%;
        transform: translateY(-50%);
    }
    
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-bg-white);
        padding: var(--spacing-xl) var(--spacing-lg);
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        z-index: 200;
        margin-top: 0;
    }
    
    .nav.is-open {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 1.125rem;
        padding: var(--spacing-sm);
    }
    
    .nav-close {
        display: block;
        position: absolute;
        top: var(--spacing-md);
        right: var(--spacing-md);
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--color-text);
        cursor: pointer;
    }
    
    .main {
        padding: var(--spacing-lg) 0;
    }
    
    .timeline {
        padding-left: 1.5rem;
    }
    
    .timeline-item::before {
        left: -1.5rem;
        width: 8px;
        height: 8px;
        transform: translateX(-3px);
    }
    
    .links-list {
        columns: 1;
    }
    
    .notice-box {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .profile-container {
        width: 100px;
        height: 100px;
    }
    
    .profile-image {
        width: 100px !important;
        height: 100px !important;
        max-width: 100px !important;
        max-height: 100px !important;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 1rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .card {
        padding: var(--spacing-md);
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .nav-toggle,
    .nav-close {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }
    
    a {
        color: #000;
        text-decoration: none;
    }
    
    .notice-box {
        border: 1px solid #ccc;
        background: none;
    }
}

/* Focus Styles for Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}