/*CSS VARIABLEN - Alle Farben & Schatten*/
:root {
    /* Hauptfarben */
    --primary-color: #000000;          /* Schwarz */
    --secondary-color: #00D9FF;        /* Cyan */
    
    /* Text Farben */
    --text-light: #ffffff;             /* Weisser Text */
    --text-gray: #ababab;              /* Grauer Text */
    
    /* Hintergrund Farben */
    --bg-dark: #080808;                /* Sehr dunkel */
    --bg-darker: #0a0a0a;              /* Noch dunkler */
    --bg-card: #1a1a1a;                /* Card Hintergrund #1a1a1a*/
    --bg-footer: #000000;              /* Footer Hintergrund */
    
    /* Hover & Aktiv Farben */
    --hover-secondary: #d4d4d4;        /* Helleres Silber bei Hover */
    
    /* Status Farben */
    --success-color: #4caf50;          /* Erfolg */
    --error-color: #f44336;            /* Fehler */
    --success-bg: rgba(76, 175, 80, 0.2);
    --error-bg: rgba(244, 67, 54, 0.2);
    
    /* Schatten - Alle Varianten (mit Cyan/Sekundärfarbe) */
    --shadow-md: 0 5px 20px rgba(0, 217, 255, 0.2);
    --shadow-lg: 0 10px 30px rgba(0, 217, 255, 0.25);
    --shadow-xl: 0 15px 40px rgba(0, 217, 255, 0.3);
    
    /* Glow Effekte (für Hover) - Cyan Glow */
    --glow-secondary: 0 0 20px rgba(0, 217, 255, 0.4), 0 0 40px rgba(0, 217, 255, 0.2);
    --glow-secondary-lg: 0 10px 30px rgba(0, 217, 255, 0.5), 0 0 60px rgba(0, 217, 255, 0.3);
    
    /* Transparente Overlay Farben */
    --overlay-dark: rgba(0, 0, 0, 0.9);
    --overlay-secondary: rgba(0, 217, 255, 0.15);
    
    /* Navbar Hintergrund */
    --navbar-bg: rgba(0, 0, 0, 0.95);
    
    /* Border Farben */
    --border-light: #333333;
    --border-secondary: var(--secondary-color);
    --border-transparent: transparent;
}

/*RESET & GRUNDLAGEN*/
* {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
}

/*HEADER SECTION*/
#header {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--bg-card) 100%);
    position: relative;
    display: flex;
    align-items: center;
}

.container {
    padding: clamp(18px, 2.5vw, 20px) clamp(8%, 9vw, 10%);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/*NAVIGATION*/
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: clamp(14px, 2vw, 20px) clamp(8%, 9vw, 10%);
    position: fixed;
    top: 0; left: 0; right: 0;
    background: var(--navbar-bg);
    z-index: 1000;
    transition: all 0.3s ease;
}
nav.scrolled { box-shadow: var(--shadow-md); }

.logo { font-size: clamp(24px, 2.5vw, 28px); font-weight: 700; color: var(--secondary-color); text-decoration: none; }

nav ul { display: flex; list-style: none; gap: clamp(24px, 3.2vw, 40px); }
nav ul li a{
    text-decoration:none; color:var(--text-light);
    font-size:clamp(15px,1.3vw,16px); font-weight:500; position:relative; transition:color .3s;
}
nav ul li a::after{
    content:''; width:0; height:3px; background:var(--secondary-color);
    position:absolute; left:0; bottom:-6px; transition:width .3s;
}
nav ul li a:hover { color: var(--secondary-color); }
nav ul li a:hover::after { width: 100%; }

/*MOBILE MENU*/
.menu-toggle{ display:none; flex-direction:column; cursor:pointer; gap:5px; }
.menu-toggle span{ width:25px; height:3px; background:var(--secondary-color); transition:.3s; }

/*HEADER TEXT*/
.header-content { margin-top:120px; display:flex; align-items:center; gap:60px; flex-wrap:wrap; }
.header-text { flex:1; min-width:300px; }
.header-text h1 { font-size: clamp(46px, 5vw, 50px); margin:20px 0; animation: fadeInUp 1s ease; }
.header-text h1 span { color: var(--secondary-color); }
.header-text p { font-size: clamp(20px, 2.2vw, 24px); color: var(--text-gray); animation: fadeInUp 1.2s ease; }

/* Blinkender Schreib-Cursor */
.typing-text.has-cursor::after{
  content:""; display:inline-block; width:0.1em; height:1em; background: currentColor;
  margin-left:.15em; vertical-align:-.1em; animation: qb-caret-blink .8s steps(1,end) infinite;
}
.typing-text.cursor-pause::after{ animation:none; }
@keyframes qb-caret-blink { 50% { opacity:0; } }

/*HEADER IMAGE*/
.header-image { flex:1; min-width:300px; margin-right:-10vmin; display:flex; justify-content:center; align-items:center; animation: fadeInUp 1.2s ease; }
.header-image img{
    width:50vmin;
    max-width:500px;
    height:auto;
    border-radius:20px;
    box-shadow:var(--glow-secondary-lg);
    transition:all .4s ease;
    border:3px solid transparent;
    border-color: var(--secondary-color);
}
/*CALL TO ACTION BUTTON*/
.cta-button{
    display:inline-block; margin-top:30px;
    padding: clamp(13px, 1.8vmin, 15px) clamp(36px, 4.8vmin, 40px);
    background:var(--bg-card);
    border: clamp(1.5px, .3vmin, 2px) solid var(--border-light);
    color:var(--text-light); text-decoration:none;
    border-radius: clamp(46px, 6vmin, 50px);
    font-weight:600; transition: all .3s ease; animation: fadeInUp 1.6s ease;
    font-size: clamp(15px, 1.9vmin, 16px);
}
.cta-button:hover{ transform:translateY(-3px); box-shadow:var(--glow-secondary-lg); border:2px solid var(--border-secondary); }

/*ÜBER MICH SECTION*/
#about { padding: 100px 0; background: var(--bg-dark); }

/* >>> REPLACED: robuster Flex-Layout-Block <<< */
#about .row{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  gap: clamp(24px, 4vw, 60px);
}

/* beide Spalten flexibel + dürfen schrumpfen */
.about-col-1,
.about-col-2{
  flex: 1 1 320px;   /* Basisbreite, wächst/schrumpft */
  min-width: 0;     /* verhindert Text-Überlauf */
}

/* Bild-Spalte begrenzen */
.about-col-1{ max-width: 520px; display:flex; justify-content:center; align-items:center; }
.about-col-1 img{
  display:block;
  width:100%;
  max-width:520px;
  height:auto;
  border-radius:20px;
  box-shadow: var(--glow-secondary-lg);
  transition: all .4s ease;
  border:3px solid transparent;
  border-color: var(--secondary-color);
  object-fit:cover;
}
/* Textspalte sicher umbrechen lassen */
.about-col-2{ flex: 1.5 1 320px; overflow-wrap:anywhere; min-width:0; }

.sub-title {
    font-size: clamp(44px, 5.5vw, 48px);
    font-weight: 700; color: var(--text-light);
    margin-bottom: 20px; position: relative; display: inline-block;
}
.sub-title::after{ content:''; width:100px; height:4px; background:var(--secondary-color); position:absolute; bottom:-10px; left:0; }

.about-col-2 p{ color:var(--text-gray); margin:30px 0; font-size: clamp(15px, 1.9vmin, 16px); }

/* Tabs */
.tab-titles{ display:flex; gap:40px; margin:30px 0; flex-wrap:wrap; }
.tab-links{ font-size:clamp(17px,1.8vmin,18px); font-weight:600; cursor:pointer; position:relative; color:var(--text-gray); transition:color .3s; padding:10px 0; }
.tab-links::after{ content:''; width:0; height:3px; background:var(--secondary-color); position:absolute; left:0; bottom:0; transition:width .3s; }
.tab-links:hover{ color:var(--text-light); }
.tab-links.active-link{ color:var(--secondary-color); }
.tab-links.active-link::after{ width:100%; }
.tab-contents{ display:none; animation: fadeIn .5s ease; margin-top: 4.5vmin; }
.tab-contents.active-tab{ display:block; }
.tab-contents ul{ list-style:none; margin-top:-6vmin; }
.tab-contents ul li{
    margin:15px 0; padding-left:30px; position:relative; background:var(--bg-card);
    border-radius:5px; padding:5px 10px; border:2px solid var(--border-light);
}
.tab-contents ul li span{ color:var(--secondary-color); font-weight:700; font-size:16px; }
.tab-contents ul li:hover{ transform:translateY(-2px); border-color:var(--secondary-color); box-shadow:var(--shadow-md); transition:all .5s; }

/* === Portfolio Grid === */
.portfolio { margin-top: clamp(40px, 6vmin, 48px); }
.projects-grid {
  margin-top: 4vmin;
  margin-bottom: 4vmin;
  display: grid;
  gap: clamp(18px, 2.6vmin, 20px);
  grid-template-columns: repeat(3, minmax(0,1fr));
}
@media (max-width:1100px){ .projects-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width:640px){  .projects-grid{ grid-template-columns: 1fr; } }

.project-card {
  background: var(--bg-card, #0f1629);
  color: var(--text-light, #e8eaff);
  border: clamp(1px, .18vmin, 1.5px) solid var(--border-light, #28324d);
  border-radius: clamp(24px, 3vmin, 28px);
  box-shadow: var(--shadow-lg, 0 12px 30px rgba(0,0,0,.35));
  padding: clamp(20px, 2.8vmin, 24px);
  display: flex; flex-direction: column; height: 100%;
  gap: clamp(12px, 1.8vmin, 16px);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--border-secondary); box-shadow: var(--glow-secondary-lg); }

.project-icon{ font-size: clamp(20px, 2.2vmin, 26px); color: var(--secondary-color); }
.project-title{ font-size: clamp(18px, 2.2vmin, 24px); font-weight: 700; letter-spacing: .2px; }
.project-desc{ color: var(--text-gray); line-height: 1.55; font-size: clamp(15px, 1.9vmin, 16px); }

/* Tags */
.project-tags{ display:flex; gap: clamp(6px, .9vmin, 10px); flex-wrap:wrap; margin-top: clamp(6px, 1vmin, 10px); }
.tech-chip{
  padding: clamp(7px, 1.1vmin, 10px) clamp(10px, 1.6vmin, 12px);
  border-radius: clamp(18px, 3vmin, 24px);
  background: color-mix(in oklab, var(--bg-card, #0f1629) 70%, #ffffff 5%);
  border: clamp(1px, .18vmin, 1.5px) solid var(--border-light, #28324d);
  color: var(--text-light);
  font-size: clamp(13px, 1.7vmin, 14px);
  font-weight: 600;
}

/* CTA-Button */
.project-cta{
  margin-top:auto; align-self:start;
  padding: clamp(14px, 2vmin, 16px) clamp(24px, 3.2vmin, 26px);
  border-radius:999px; font-weight:700; font-size:clamp(15px,1.9vmin,16px);
  text-decoration:none; color:#fff;
  background: linear-gradient(135deg,
    color-mix(in oklab, var(--secondary-color) 90%, #fff 0%) 0%,
    color-mix(in oklab, var(--secondary-color) 70%, #000 15%) 100%);
  box-shadow: 0 clamp(10px, 1.6vmin, 16px) clamp(30px, 4vmin, 36px) rgba(108,99,255,.35);
  transition: transform .25s, box-shadow .25s, filter .25s;
}
.project-cta:hover{ transform:translateY(-3px); box-shadow:0 16px 36px rgba(108,99,255,.45); filter:brightness(1.05); }

.btn {
    display:block; margin:50px auto 0; width:fit-content;
    border:2px solid var(--border-light);
    padding: clamp(13px, 1.8vmin, 14px) clamp(46px, 5.4vmin, 50px);
    border-radius: clamp(46px, 6vmin, 50px);
    text-decoration:none; color:var(--text-light);
    background:var(--bg-card); font-weight:600; transition:.3s;
}
.btn:hover{ transform:translateY(-3px); box-shadow:var(--glow-secondary-lg); border:2px solid var(--border-secondary); }

/*CONTACT SECTION*/
#contact { padding: 100px 0; background: var(--bg-darker); }
.contact-content{ display:flex; gap:60px; margin-top:50px; flex-wrap:wrap; }
.contact-left{ flex:1; min-width:300px; }
.contact-left h2{ font-size: clamp(28px, 2.6vw, 32px); margin-bottom:20px; color:var(--secondary-color); }
.contact-info{ margin:30px 0; }
.contact-item{ display:flex; align-items:center; gap:20px; margin:20px 0; color:var(--text-gray); }
.contact-item i{ font-size:24px; color:var(--secondary-color); width:40px; }
.social-links{ display:flex; gap:20px; margin-top:30px; }
.social-links a{
    width:50px; height:50px; background:var(--bg-card); border-radius:50%;
    display:flex; align-items:center; justify-content:center; color:var(--secondary-color);
    text-decoration:none; transition:.3s; border:2px solid var(--border-transparent);
}
.social-links a:hover{ background:var(--secondary-color); color:var(--primary-color); transform:translateY(-5px); border-color:var(--secondary-color); box-shadow:var(--glow-secondary); }
.contact-right{ flex:1; min-width:300px; }
.contact-form{ display:flex; flex-direction:column; gap:20px; }
.contact-item a{ text-decoration:none; color:var(--text-gray); }

.form-group{ display:flex; flex-direction:column; }
.form-group label{ margin-bottom:8px; color:var(--text-light); font-weight:500; font-size: clamp(15px, 1.9vmin, 16px); }
.form-group input, .form-group textarea{
    padding: clamp(13px, 1.8vmin, 15px); background:var(--bg-card);
    border:2px solid var(--border-transparent); border-radius: clamp(9px, 1.4vmin, 10px);
    color:var(--text-light); font-size: clamp(15px, 1.9vmin, 16px); transition:.3s;
}
.form-group input:focus, .form-group textarea:focus{ outline:none; border-color:var(--secondary-color); box-shadow:var(--glow-secondary); }
.form-group textarea{ resize:vertical; min-height:150px; }

.form-message{
    display:none; padding: clamp(13px, 1.8vmin, 15px);
    border-radius: clamp(9px, 1.4vmin, 10px);
    margin-top: clamp(18px, 2.4vmin, 20px);
    text-align:center; border-width: clamp(1.5px, .3vmin, 2px);
}
.form-message.success{ background:var(--success-bg); color:var(--success-color); border:2px solid var(--success-color); }
.form-message.error{ background:var(--error-bg); color:var(--error-color); border:2px solid var(--error-color); }

.form-info{ margin-top:20px; padding:15px; background:rgba(0,217,255,.1); border-radius:10px; border:2px solid var(--secondary-color); }
.form-info p{ color:var(--text-gray); font-size:14px; margin:0; }
.form-info p fa-solid fa-info-circle{ color:var(--secondary-color); }

/* Submit button + loading spinner */
.submit-btn{
    position:relative;
    padding: clamp(13px, 1.8vmin, 15px) clamp(36px, 4.8vmin, 40px);
    background:var(--bg-card); color:var(--text-light);
    border: clamp(1.5px, .3vmin, 2px) solid var(--border-light);
    border-radius: clamp(46px, 6vmin, 50px);
    font-size: clamp(15px, 1.9vmin, 16px);
    font-weight:600; cursor:pointer; transition:.3s;
}
.submit-btn:hover{ transform:translateY(-3px); box-shadow:var(--glow-secondary-lg); border:2px solid var(--border-secondary); }
.submit-btn.loading{ opacity:.95; pointer-events:none; }
.submit-btn.loading::after{
  content:''; position:absolute; right:14px; top:50%; transform:translateY(-50%);
  width:14px; height:14px; border:2px solid rgba(255,255,255,.3); border-top-color:#fff; border-radius:50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/*IMPRESSUM SECTION*/
#impressum{ padding:100px 0; background:var(--bg-dark); }
.impressum-content{ max-width:800px; margin:50px auto; color:var(--text-gray); }
.impressum-content h2{ color:var(--secondary-color); font-size:clamp(18px,2.2vw,28px); margin:30px 0 15px; }
.impressum-content p{ margin:10px 0; line-height:1.8; }
.impressum-content p a{ text-decoration:none; color:var(--secondary-color); }

/*FOOTER*/
footer{ background:var(--bg-footer); padding:40px 0 20px; text-align:center; }
.footer-content{ display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:40px; margin-bottom:30px; }
.footer-section{ flex:1; min-width:200px; }
.footer-section h3{ color:var(--secondary-color); margin-bottom:15px; font-size: clamp(18px, 1.6vw, 20px); }
.footer-links{ list-style:none; }
.footer-links li{ margin:10px 0; }
.footer-links a{ color:var(--text-gray); text-decoration:none; transition:color .3s; }
.footer-links a:hover{ color:var(--secondary-color); }
.footer-bottom{ border-top:1px solid var(--border-light); padding-top:20px; color:var(--text-gray); font-size:14px; }

/*SCROLL TO TOP BUTTON*/
.scroll-top{
    position:fixed; bottom:30px; right:30px; width:50px; height:50px;
    background:var(--bg-color); color:var(--text-light);
    border:2px solid var(--border-light); border-radius:50%;
    display:flex; align-items:center; justify-content:center; cursor:pointer;
    opacity:0; visibility:hidden; transition:.3s; z-index:999;
}
.scroll-top.active{ opacity:1; visibility:visible; }
.scroll-top:hover{ transform:translateY(-5px); box-shadow:var(--glow-secondary-lg); border:2px solid var(--border-secondary); }

/*ANIMATIONS*/
@keyframes fadeIn { from{ opacity:0; } to{ opacity:1; } }
@keyframes fadeInUp { from{ opacity:0; transform:translateY(30px);} to{ opacity:1; transform:translateY(0);} }

/*RESPONSIVE DESIGN*/
@media (max-width: 900px){
  /* >>> REPLACED: Stapel-Layout für Über mich <<< */
  #about .row{ gap: clamp(16px, 4vw, 32px); }
  .about-col-1, .about-col-2{ flex-basis:100%; }
  .about-col-1{ margin-inline:auto; text-align:center; }
  .about-col-2{ text-align:left; }
}

@media (max-width: 768px) {
    .container{ padding: clamp(16px, 2vw, 20px) 5%; }
    nav{ padding: clamp(12px, 1.8vw, 15px) 5%; }
    nav ul{
        position:fixed; top:70px; right:-100%; width:250px; height:calc(100vh - 70px);
        background:var(--navbar-bg); flex-direction:column; padding:40px 20px; transition:right .3s; gap:20px; box-shadow:var(--shadow-lg);
    }
    nav ul.active{ right:0; }
    .menu-toggle{ display:flex; }
    .header-content{ flex-direction:column; text-align:center; }
    .header-text{ text-align:center; }
    .header-text h1{ font-size: clamp(32px, 8vw, 40px); }
    .header-text p{ font-size: clamp(18px, 4.5vw, 20px); }
    .header-image{ max-width:100%; margin-right:0; }
    .header-image img{ max-width:350px; }
    .sub-title{ font-size: clamp(28px, 7vw, 36px); }
    .footer-content{ text-align:center; }
    .footer-section{ width:100%; }
}

@media (max-width: 480px){
    .header-text h1{ font-size: clamp(28px, 9vw, 32px); }
    .header-image img{ max-width:280px; }
    .sub-title{ font-size: clamp(24px, 7.5vw, 28px); }
    .tab-titles{ gap:20px; }
    .about-col-2 p{ font-size: clamp(14px, 3.6vw, 16px); }
}