/* Inter Font (Lokal eingebunden - DSGVO-konform ohne externe CDN-Aufrufe) */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('../fonts/inter-latin-ext-variable.woff2') format('woff2');
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('../fonts/inter-latin-variable.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
    --bg-color: #121214;
    --surface-color: #1c1c1f;
    --border-color: #2e2e32;
    --header-bg: rgba(18,18,20,0.85);
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --accent-color: #8b7cf7;
    --accent-color-dark: #a295ff;
    --shadow-color: #f4f4f1;
    --max-width: 800px;
    --radius: 12px;
    --logo-filter: invert(1);
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-color: #f4f4f5;
        --surface-color: #ffffff;
        --border-color: #d4d4d8;
        --text-main: #18181b;
        --text-muted: #52525b;
        --accent-color: #6366f1;
        --header-bg: rgba(244,244,245,0.85);
        --shadow-color: #26262a;
        --logo-filter: invert(0);
    }
}

@media (prefers-color-scheme: dark) {
    body:has(#theme-toggle:checked) {
        --bg-color: #f4f4f5;
        --surface-color: #ffffff;
        --border-color: #d4d4d8;
        --text-main: #18181b;
        --text-muted: #52525b;
        --accent-color: #6366f1;
        --header-bg: rgba(244,244,245,0.85);
        --shadow-color: #26262a;
        --logo-filter: invert(0);
    }
}

@media (prefers-color-scheme: light) {
    body:has(#theme-toggle:checked) {
        --bg-color: #121214;
        --surface-color: #1c1c1f;
        --border-color: #2e2e32;
        --header-bg: rgba(18,18,20,0.85);
        --text-main: #f4f4f5;
        --text-muted: #a1a1aa;
        --accent-color: #8b7cf7;
        --accent-color-dark: #a295ff;
        --shadow-color: #f4f4f1;
        --max-width: 800px;
        --radius: 12px;
        --logo-filter: invert(1);
    }
}

/* Fallback & persistente Theme-Auswahl */
:root[data-theme="light"],
body.theme-light {
    --bg-color: #f4f4f5;
    --surface-color: #ffffff;
    --border-color: #d4d4d8;
    --text-main: #18181b;
    --text-muted: #52525b;
    --accent-color: #6366f1;
    --header-bg: rgba(244,244,245,0.85);
    --shadow-color: #26262a;
    --logo-filter: invert(0);
}

:root[data-theme="dark"],
body.theme-dark {
    --bg-color: #121214;
    --surface-color: #1c1c1f;
    --border-color: #2e2e32;
    --header-bg: rgba(18,18,20,0.85);
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --accent-color: #8b7cf7;
    --accent-color-dark: #a295ff;
    --shadow-color: #f4f4f1;
    --max-width: 800px;
    --radius: 12px;
    --logo-filter: invert(1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.7;
    transition: background-color 0.5s ease, color 0.5s ease;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: 
        "header"
        "sidebar"
        "main"
        "footer";
    overflow-x: clip;
}

main li, 
form, 
.sidebar, 
.main-nav {
    transition: background-color 0.5s ease, border-color 0.5s ease;
}

main {
    width: 100%;
    grid-area: main;
    max-width: var(--max-width);
    margin: 3rem auto;
    padding: 0 15px;
}

main.home-main {
    max-width: 100%;
    padding: 0;     
    margin: 0;   
}

main.wide-content {
    max-width: 800px;
}

article section {
    margin-bottom: 5rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

article section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.sidebar {
    grid-area: sidebar;
    align-self: flex-start;
    max-width: var(--max-width);
    margin: 4rem 0.5rem 0;
    padding: 1.5rem;
    background-color: var(--header-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    position: sticky;
    top: 140px;
    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
}

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

.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toc-list a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.5s ease;
}

.toc-list a:hover {
    color: var(--text-main);
    text-shadow: var(--shadow-color) 0 0 12px;
}

main h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

main h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

main h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

main p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

main p a {
    color: var(--accent-color);
    text-decoration: none;
    transition: border-color 0.5s ease;
}

main p a:hover {
    text-decoration: none;
    text-shadow: var(--accent-color-dark) 0 0 12px;
}

main ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

main li {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--radius);
    color: var(--text-muted);
}

main li strong {
    display: block;
    color: var(--text-main);
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

main li a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.5s ease, text-shadow 0.15s ease;
}

main li a:hover {
    color: var(--accent-color);
    text-shadow: var(--accent-color-dark) 0 0 12px;
}

.main-header {
    grid-area: header;
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1rem;
    background-color: var(--header-bg);
    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color 0.5s ease, border-color 0.5s ease;
    gap: 1rem;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-brand h1 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-main);
    transition: text-shadow 0.3s ease;
}

.header-brand a {
    display: flex;
    gap: 1rem;
    text-decoration: none;

}

.header-brand a:hover .logo {
    filter: var(--logo-filter) drop-shadow(0 0 10px var(--shadow-color));
}

.header-brand a:hover h1 {
    text-shadow: var(--shadow-color) 0 0 10px;
}

.logo {
    width: 40px;
    height: 40px;
    filter: var(--logo-filter);
    transition: opacity 0.5s ease, transform 0.5s ease, filter 0.3s ease;
}

.main-nav {
    padding: 1.2rem 0;
}

.nav-links {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.5s ease, text-shadow 0.15s ease;
}

.nav-links a:hover {
    color: var(--text-main);
    text-shadow: var(--shadow-color) 0 0 12px;
}

.nav-links a.active {
    color: var(--text-main);
    font-weight: 600;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    justify-self: end;
}

.menu-toggle-btn {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 38px;
    height: 36px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.menu-toggle-btn .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-main);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle-btn.is-active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle-btn.is-active .bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle-btn.is-active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 699px) {
    .main-header {
        flex-wrap: wrap;
        padding: 0.8rem 1rem;
    }

    .menu-toggle-btn {
        display: flex;
    }

    .header-brand h1 {
        font-size: 1.2rem;
    }

    .logo {
        width: 32px;
        height: 32px;
    }

    .main-nav {
        display: none;
        width: 100%;
        order: 3;
        padding: 0.8rem 0 0.3rem 0;
        border-top: 1px solid var(--border-color);
        margin-top: 0.5rem;
    }

    .main-nav.nav-open {
        display: block;
        animation: navSlideDown 0.25s ease-out;
    }

    .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .nav-links a {
        padding: 0.75rem 1rem;
        background-color: var(--surface-color);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        text-align: center;
        font-size: 1rem;
    }

    .nav-links a.active {
        border-color: var(--accent-color);
        border-bottom-width: 2px;
    }
}

@keyframes navSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-section {
    position: relative;
    width: 100%;
    height: 40vh;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
    padding-bottom: 3rem;
}

.hero-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60vh;
    object-fit: cover; 
    z-index: -2;
}

.hero-fade {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%; 
    background: linear-gradient(to bottom, transparent, var(--bg-color));
    z-index: -1; 
}

.hero-content h1 {
    font-size: 3rem; 
    margin-bottom: 1rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8); 
    z-index: 1;
}

.profile-header {
    display: flex;
    flex-direction: column; 
    align-items: center;    
    text-align: center;
    gap: 1rem; 
    margin-top: -85px;     
    margin-bottom: 2rem;
}

.profile-title {
    font-size: 2.2rem;  
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-main);
    margin: 0;
    text-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.avatar-image {
    width: 120px;      
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--bg-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
}

.text-content {
    background-color: var(--bg-color); 
    width: 100%;
    position: relative;
    z-index: 2;
    padding: 2rem max(20px, calc(50vw - 400px)) 2rem;
    text-align: left;
}

.text-content > p:first-of-type {
    margin-top: 2rem; 
}

.image-grid, 
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

main > img {
    max-width: 250px;
    height: auto;
    border-radius: var(--radius);
    margin: 0 auto 2rem auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: block;
}

figure {
    margin: 0;
}

figure img,
video,
iframe {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    display: block;
    background-color: black;
}

figcaption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.8rem;
}

.two-click-embed {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    text-align: center;
    gap: 0.8rem;
    box-sizing: border-box;
}

.two-click-embed.is-loaded {
    padding: 0;
    background-color: black;
    border: none;
}

.two-click-embed.is-loaded iframe {
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.two-click-embed p {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 440px;
    margin: 0;
    line-height: 1.5;
}

.two-click-embed strong {
    color: var(--text-main);
    display: block;
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
}

.load-embed-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background-color: var(--accent-color);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.load-embed-btn:hover {
    background-color: var(--accent-color-dark);
    box-shadow: 0 0 10px var(--accent-color-dark);
}

form {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 0.2rem;
}

.form-group label {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-main);
}

.form-group input,
.form-group textarea {
    width: 100%;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.8rem;
    border-radius: 8px;
    font-family: inherit;
    transition: border-color 0.5s ease, box-shadow 0.15s ease;
}

.form-group textarea {
    min-height: 200px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(139, 124, 247, 0.2);
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

button {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

button[type="submit"] {
    background-color: var(--accent-color);
    color: white;
}

button[type="submit"]:hover {
    background-color: var(--accent-color-dark);
    border: 1px solid var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color-dark);
}

button[type="reset"] {
    background-color: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

button[type="reset"]:hover {
    background-color: var(--border-color);
    color: var(--text-main);
    box-shadow: 0 0 5px var(--text-main);
}

.theme-toggle-btn {
    width: 72px;
    height: 36px;
    background-color: #2a2a2c;
    border-radius: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4), 0 0 0px;
    transition: background-color 0.5s ease, box-shadow 0.15s ease;
    position: relative;
    flex-shrink: 0;
}

.theme-toggle-btn:hover{
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4), 0 0 5px var(--accent-color);
}

.toggle-circle {
    position: absolute; 
    top: 3px;           
    left: 3px;
    width: 30px;
    height: 30px;
    background-color: #ffffff; 
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1), background-color 0.5s ease;
    z-index: 2;
}

.icon-sun, 
.icon-moon {
    width: 16px;
    height: 16px;
    z-index: 1;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.icon-sun {
    stroke: #2a2a2c;
    opacity: 0; 
    transform: rotate(-45deg);
}

.icon-moon {
    stroke: #ffffff;
    fill: #ffffff;
    opacity: 1;
}

body:has(#theme-toggle:checked) .theme-toggle-btn {
    background-color: #e5e5ea;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.1), 0 0 0px;
}

body:has(#theme-toggle:checked) .theme-toggle-btn:hover {
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.1), 0 0 5px var(--shadow-color);
}

body:has(#theme-toggle:checked) .toggle-circle {
    transform: translateX(36px); 
    background-color: #2a2a2c;  
}

body:has(#theme-toggle:checked) .icon-sun {
    opacity: 1;
    transform: rotate(0deg);
}

body:has(#theme-toggle:checked) .icon-moon {
    opacity: 0;
}

.main-footer {
    grid-area: footer;
    width: 100%;       
    max-width: 100%;     
    margin: 0;               
    padding: 4rem max(20px, calc(50vw - 400px)) 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background-color: var(--bg-color); 
    position: relative;
    z-index: 2; 
}

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

.footer-links, 
.footer-contact {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.main-footer a {
    color: var(--text-muted);
    text-decoration: none;
    text-shadow: none;
    transition: color 0.5s ease,text-shadow 0.15s ease;
}

.main-footer a:hover {
    color: var(--text-main);
    text-shadow: var(--shadow-color) 0 0 12px;
} 

@media (min-width: 700px) {
    body {
        grid-template-areas: 
        "header"
        "main"
        "footer";
    }

    body:has(.sidebar) {
        grid-template-columns: 1fr 280px minmax(auto, var(--max-width)) 1fr;
        column-gap:  2rem;
        grid-template-areas: 
            "header  header  header  header"
            ".       sidebar main    ."
            "footer  footer  footer  footer";
    }

    body:has(.sidebar) main {
        margin: 4rem 0;
        max-width: 100%;
    }

    .sidebar {
        top: 110px;
    }

    .header-brand h1 {
        font-size: 1.5rem;
    }

    form {
        display: grid;
        grid-template-columns: 1fr 2fr; 
        column-gap: 1.5rem;
        row-gap: 0.2rem;
        padding: 2rem;
    }

    .form-group:nth-of-type(3),
    .form-group:nth-of-type(4),
    .form-actions {
        grid-column: 1 / span 2;
    }

    .main-header {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
    }
    .main-nav {
        position: static;
        transform: none;
        justify-self: center;
        padding: 0;
    }

    .theme-toggle-btn {
        justify-self: end;
    }

    main.home-main ul {
        flex-direction: row;
    }

    .hero-content h1 {
        font-size: 4.5rem; 
        letter-spacing: 0.5rem;
    }

    .nav-links {
        gap: 2rem;
    }

    .profile-header {
        flex-direction: row;  
        text-align: left; 
        margin-top: -100px; 
    }
    
    .avatar-image {
        width: 150px;       
        height: 150px;
    }

    .profile-title {
        font-size: 4rem;  
    }

    article section {
        scroll-margin-top: 100px ;
    }

    html {
        scroll-padding-top: 0px;
    }
}

/* Contact Card Styling (Clean & Minimalistic) */
.contact-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    max-width: 650px;
    margin: 2.5rem auto 1rem auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.contact-card p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin: 0;
    max-width: 500px;
}

.contact-email-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
    word-break: break-all;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.contact-email-link:hover {
    color: var(--accent-color-dark);
    text-shadow: 0 0 14px var(--accent-color-dark);
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.9rem 2rem;
    background-color: var(--accent-color);
    color: #ffffff !important;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
}

.contact-btn:hover {
    background-color: var(--accent-color-dark);
    box-shadow: 0 0 12px var(--accent-color-dark);
}

.contact-subinfo {
    font-size: 0.95rem !important;
    color: var(--text-muted);
    margin-top: 1rem !important;
}

/* Datenschutz Layout Optimierung */
.privacy-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
}

@media (min-width: 600px) {
    .privacy-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

.privacy-list li {
    padding: 1.2rem;
}

/* ==========================================
   Inhaltsverzeichnis (details.sidebar)
   Mobil: einklappbar | Desktop: immer offen, links neben dem Hauptteil
   ========================================== */
.toc-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-main);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.toc-summary::-webkit-details-marker {
    display: none;
}

.toc-icon {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.project-toc[open] .toc-icon {
    transform: rotate(180deg);
}

.project-toc[open] .toc-summary {
    margin-bottom: 1rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-color);
}

.toc-list li {
    line-height: 1.4;
}

.toc-list a {
    display: block;
}

.toc-summary:focus-visible,
.toc-list a:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
    border-radius: 4px;
}

/* Desktop: Verzeichnis steht fest links, kein Einklappen */
@media (min-width: 700px) {
    .toc-summary {
        cursor: default;
        pointer-events: none;
    }

    .toc-icon {
        display: none;
    }
}

/* ==========================================
   Mobile Optimierung (Handy)
   ========================================== */
@media (max-width: 699px) {
    html {
        scroll-padding-top: 80px;
    }

    /* Verzeichnis: normal im Fluss, oberhalb des Inhalts, einklappbar */
    .sidebar {
        position: static;
        margin: 1rem 15px 0;
        padding: 0.9rem 1.1rem;
        max-width: none;
    }

    .toc-list a {
        padding: 0.45rem 0;
        font-size: 0.95rem;
    }

    main {
        margin: 1.5rem auto 2rem;
    }

    main h1 {
        font-size: 2rem;
    }

    main h2 {
        font-size: 1.55rem;
        line-height: 1.3;
    }

    main h3 {
        font-size: 1.4rem;
    }

    main p {
        font-size: 1rem;
    }

    article section {
        margin-bottom: 3rem;
        padding-bottom: 2rem;
        scroll-margin-top: 80px;
    }

    .image-grid,
    .video-grid {
        gap: 1rem;
        margin: 1.5rem 0;
    }

    .two-click-embed {
        padding: 1rem;
        gap: 0.5rem;
    }

    .two-click-embed p {
        font-size: 0.85rem;
    }

    .contact-card {
        padding: 2rem 1.25rem;
    }

    .contact-email-link {
        font-size: 1.2rem;
    }

    form {
        padding: 1rem;
    }

    .form-actions {
        flex-wrap: wrap;
    }

    .main-footer {
        padding-top: 2.5rem;
    }

    .footer-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-links,
    .footer-contact {
        gap: 0.6rem 1.2rem;
    }
}

/* Mobile: Startseite, Kontakt, Impressum/Datenschutz */
@media (max-width: 699px) {
    /* Lange Wörter (z. B. "Datenschutzerklärung") laufen nicht mehr aus dem Bildschirm */
    main h1,
    main h2,
    main p,
    main li {
        overflow-wrap: break-word;
        hyphens: auto;
        -webkit-hyphens: auto;
    }

    /* Startseite */
    .profile-title {
        font-size: clamp(1.6rem, 8vw, 2.2rem);
    }

    /* Kontakt */
    .contact-card {
        margin: 1.5rem auto 1rem;
        gap: 1.2rem;
    }

    .contact-card p {
        font-size: 1rem;
    }

    .contact-email-link {
        font-size: clamp(1rem, 5vw, 1.2rem);
        word-break: normal;
        overflow-wrap: anywhere;
    }

    .contact-actions,
    .contact-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Sehr kleine Handys */
@media (max-width: 400px) {
    .header-brand,
    .header-brand a {
        gap: 0.5rem;
    }

    .header-brand h1 {
        font-size: 1rem;
    }

    .header-actions {
        gap: 0.5rem;
    }

    .theme-toggle-btn {
        width: 64px;
    }

    body:has(#theme-toggle:checked) .toggle-circle {
        transform: translateX(28px);
    }
}