/* ==========================================
   0. THEME VARIABLEN (Vollständig Dynamisch)
   ========================================== */
:root {
    /* --- Hell-Modus --- */
    --bg-body: #ffffff;
    --bg-section-alt: #ddddec;
    --text-main: #333333;
    --text-muted: #666666;
    --header-bg: rgba(255, 255, 255, 0.95);
    
    /* Cards */
    --card-bg: #ffffff;
    --card-shadow: rgba(0, 0, 0, 0.08);
    --border-color: #eeeeee;

    /* Hero & Akzente */
    --accent: #6072c5;
    --accent-text: #ffffff;
    --accent-dark: #764ba2;
    --hero-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --hero-text: #ffffff;
    --hero-h1-gradient: linear-gradient(45deg, #ffffff, #d1d8ff);

    /* Footer */
    --footer-bg: #1a1a1a;
    --footer-text: #bbbbbb;
    --footer-link-hover: #ffffff;
}

[data-theme="dark"] {
    /* --- Dunkel-Modus --- */
    --bg-body: #0f111a;
    --bg-section-alt: #161925;
    --text-main: #e0e6ed;
    --text-muted: #94a3b8;
    --header-bg: rgba(15, 17, 26, 0.96);
    
    /* Cards */
    --card-bg: #1c2132;
    --card-shadow: rgba(0, 0, 0, 0.3);
    --border-color: #2d334a;

    /* Hero & Akzente (Im Darkmode etwas entspannter) */
    --accent: #6e6abc;
    --accent-text: #ffffff;
    --accent-dark: #3d4593;
    --hero-gradient: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    --hero-text: #e2e8f0;
    --hero-h1-gradient: linear-gradient(45deg, #818cf8, #c084fc);

    /* Footer */
    --footer-bg: #070910;
    --footer-text: #64748b;
    --footer-link-hover: #818cf8;
}

/* ==========================================
   1. RESET & BASIS STILE
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-body);
    overflow-x: hidden;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================
   2. HEADER & NAVIGATION
   ========================================== */
header {
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}



.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    text-decoration: none;
}

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

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
}

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


/* Container für die Header-Buttons */
.theme-header-btn {
    position: relative;
}

/* Gemeinsames Styling für die Haupt-Buttons im Header */
.lang-btn, .theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 20px; /* Einheitliche Rundung */
    padding: 8px 12px;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-main);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.theme-btn {
    border-radius: 50%; /* Runde Form für Theme-Btn */
    width: 40px;
    height: 40px;
}

.lang-btn:hover, .theme-btn:hover {
    border-color: var(--accent);
    background: rgba(102, 126, 234, 0.1);
}

/* Gemeinsames Styling für die Dropdowns */
.lang-dropdown, .theme-dropdown {
    position: absolute;
    top: calc(100% + 10px); /* Leicht abgesetzt */
    right: 0;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 5px 15px var(--card-shadow);
    display: none;
    flex-direction: column;
    min-width: 140px;
    z-index: 2000 !important;
    overflow: hidden;
}

.lang-dropdown.show, .theme-dropdown.show {
    display: flex;
}

/* Einheitliche Optionen im Dropdown */
.lang-dropdown a.theme-option,
.theme-dropdown .theme-option {
    background: transparent;
    border: none;
    width: 100%;
    padding: 10px 15px;
    text-align: left;
    cursor: pointer;
    color: var(--text-main);
    font-size: 0.9rem;
    text-decoration: none;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.lang-dropdown a.theme-option:hover,
.theme-dropdown .theme-option:hover {
    background-color: var(--accent);
    color: var(--accent-text);
}


/* ==========================================
   3. HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    /*height: calc(100vh - 45px);
    margin-top: 45px;*/
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--hero-gradient);
    color: var(--hero-text);
    padding: 80px 20px;
    transition: background 0.5s ease;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: var(--hero-h1-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}


/* ==========================================
   4. BUTTONS & INPUTS (Neu gestylt)
   ========================================== */

/* Basis Styling für alle Buttons (CTA, Demo, Send) */
.cta-button, 
.send-btn, 
.demo-button, 
.demo-buttons button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Haupt-Buttons (Akzentfarbe) */
.cta-button, 
.send-btn, 
.demo-buttons button {
    background-color: var(--accent);
    color: var(--accent-text);
}

.cta-button:hover, 
.send-btn:hover, 
.demo-buttons button:hover {
    background-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

/* Sekundär-Buttons (Grau/Alt) */
.demo-button {
    background-color: var(--bg-section-alt);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.demo-button:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
}

.demo-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}



/* ==========================================
   5. SECTIONS & CARDS
   ========================================== */
section {
    /*padding: 80px 0;*/
    background-color: var(--bg-body);
}

.section-dark .chat-input-area{
    background-color: var(--bg-section-alt);
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    padding: 2.5rem 0;
    margin-bottom: -2rem;
    color: var(--text-main);
}

.text {
    /*max-width: 1200px;*/
    margin: 0 auto;
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
}




/* ==========================================
   6. FOOTER
   ========================================== */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 60px 0;
    transition: background 0.3s ease;
}

.footer-links a {
    color: var(--footer-text);
    text-decoration: none;
    margin: 0 1rem;
}

.footer-links a:hover {
    color: var(--footer-link-hover);
}



/* ==========================================
   7. RESPONSIVENESS
   ========================================== */
/* --- Standard: Logo kurz ausblenden, lang anzeigen --- */

/* Standard für Desktop: Beide sichtbar */

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--accent);
    border-radius: 3px;
}


.logo-short { display: none;}
.logo-full { display: inline;}

@media (max-width: 950px) {
    .logo-full  {display: none;}
    .logo-short {display: inline;}
    .hero h1 { font-size: 2.2rem; }



}