/* ============================================================
   REDSTONELOGIK.DE — v2
   ============================================================ */

/* ── Theme variables ── */
:root {
  --bg:       #06070e;
  --bg2:      #0c0e1a;
  --card:     rgba(255,255,255,0.04);
  --card-h:   rgba(255,255,255,0.07);
  --border:   rgba(255,255,255,0.08);
  --border-h: rgba(255,255,255,0.14);
  --text:     #e4e6f0;
  --text2:    #8890a8;
  --text3:    #3e4468;
  --accent:   #4f8ef7;
  --accent2:  #a855f7;
  --accent3:  #06d6a0;
  --acbg:     rgba(79,142,247,0.1);
  --shadow:   0 4px 24px rgba(0,0,0,0.3);
  --r:        16px;
  --r-sm:     10px;
  --r-xs:     7px;
  --nav-bg:   rgba(6,7,14,0.8);
  --foot-bg:  rgba(6,7,14,0.9);
  --tag-bg:   rgba(79,142,247,0.1);
  --tag-text: #6aa3ff;
}
.theme-light {
  --bg:       #f5f6fa;
  --bg2:      #edeef4;
  --card:     rgba(255,255,255,0.85);
  --card-h:   rgba(255,255,255,0.95);
  --border:   rgba(0,0,0,0.08);
  --border-h: rgba(0,0,0,0.15);
  --text:     #1a1e2e;
  --text2:    #5a6080;
  --text3:    #b0b4c8;
  --acbg:     rgba(79,142,247,0.08);
  --shadow:   0 4px 24px rgba(0,0,0,0.08);
  --nav-bg:   rgba(245,246,250,0.85);
  --foot-bg:  rgba(245,246,250,0.9);
  --tag-bg:   rgba(79,142,247,0.08);
  --tag-text: #3b72d9;
}

/* ── Reset ── */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  overflow-x:hidden;
}
::selection { background:rgba(79,142,247,0.3); color:#fff; }
a { color:var(--accent); text-decoration:none; transition:color .2s; }
a:hover { color:var(--accent2); }
img { max-width:100%; height:auto; }

/* ── Animated background orbs ── */
.bg-orbs {
  position:fixed; top:0; left:0; width:100%; height:100%;
  pointer-events:none; z-index:0; overflow:hidden;
}
.orb {
  position:absolute; border-radius:50%; filter:blur(80px); opacity:.35;
  animation:float 20s ease-in-out infinite;
}
.theme-light .orb { opacity:.2; }
.orb-1 {
  width:600px; height:600px; top:-10%; left:-5%;
  background:radial-gradient(circle,rgba(79,142,247,0.5),transparent 70%);
  animation-duration:22s;
}
.orb-2 {
  width:500px; height:500px; top:40%; right:-8%;
  background:radial-gradient(circle,rgba(168,85,247,0.4),transparent 70%);
  animation-duration:18s; animation-delay:-5s;
}
.orb-3 {
  width:450px; height:450px; bottom:-5%; left:30%;
  background:radial-gradient(circle,rgba(6,214,160,0.35),transparent 70%);
  animation-duration:25s; animation-delay:-10s;
}
@keyframes float {
  0%,100% { transform:translate(0,0) scale(1); }
  25%  { transform:translate(40px,-30px) scale(1.05); }
  50%  { transform:translate(-20px,40px) scale(0.95); }
  75%  { transform:translate(30px,20px) scale(1.02); }
}

/* Grid overlay */
.bg-grid {
  position:fixed; top:0; left:0; width:100%; height:100%;
  pointer-events:none; z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px);
  background-size:48px 48px;
}
.theme-light .bg-grid {
  background-image:
    linear-gradient(rgba(0,0,0,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,0,0,.03) 1px,transparent 1px);
}

/* ── Layout ── */
.wrap { position:relative; z-index:1; display:flex; flex-direction:column; min-height:100vh; }
.container { max-width:960px; margin:0 auto; padding:0 28px; }
.page-content { flex:1; padding:100px 0 60px; }

/* ── Navigation ── */
.nav {
  position:fixed; top:0; left:0; right:0; z-index:100;
  background:var(--nav-bg);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
}
.nav .container {
  display:flex; align-items:center; justify-content:space-between;
  height:60px;
}
.nav-logo {
  font-size:17px; font-weight:800; color:var(--text);
  letter-spacing:-.5px;
}
.nav-logo span {
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.nav-links { display:flex; gap:6px; list-style:none; align-items:center; }
.nav-links a {
  color:var(--text2); font-size:13.5px; font-weight:500;
  padding:6px 14px; border-radius:8px;
  transition:all .2s; position:relative;
}
.nav-links a:hover { color:var(--text); background:var(--card); }
.nav-links a.active {
  color:var(--text);
  background:var(--acbg);
  border:1px solid rgba(79,142,247,.2);
}

/* Theme toggle */
.theme-btn {
  width:36px; height:36px; border-radius:10px;
  background:var(--card); border:1px solid var(--border);
  color:var(--text2); cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  font-size:16px; transition:all .2s; margin-left:8px;
}
.theme-btn:hover { border-color:var(--border-h); color:var(--text); background:var(--card-h); }

.nav-toggle {
  display:none; background:none; border:none;
  cursor:pointer; padding:8px; position:relative;
  width:36px; height:36px;
}
.nav-toggle span {
  display:block; width:18px; height:2px;
  background:var(--text); margin:4px auto;
  transition:.3s; border-radius:2px;
}

/* ── Hero ── */
.hero { padding:80px 0 40px; text-align:center; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 16px; border-radius:100px;
  background:var(--card); border:1px solid var(--border);
  font-size:12px; font-weight:500; color:var(--text2);
  margin-bottom:28px; letter-spacing:.3px;
}
.hero-badge::before {
  content:''; width:6px; height:6px; border-radius:50%;
  background:var(--accent3);
  box-shadow:0 0 6px var(--accent3);
  animation:blink 2s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.4} }
.hero h1 {
  font-size:clamp(36px,6vw,56px);
  font-weight:800; letter-spacing:-1.5px;
  line-height:1.15; margin-bottom:20px;
}
.gradient-text {
  background:linear-gradient(135deg,var(--accent),var(--accent2),var(--accent3));
  background-size:200% 200%;
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
  animation:grad-shift 6s ease-in-out infinite;
}
@keyframes grad-shift {
  0%,100%{background-position:0% 50%}
  50%{background-position:100% 50%}
}
.hero p {
  font-size:clamp(16px,2.2vw,19px);
  color:var(--text2); max-width:540px;
  margin:0 auto 36px; line-height:1.75;
}
.hero-actions { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }

/* Buttons */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:10px 24px; border-radius:10px;
  font-size:13.5px; font-weight:600;
  transition:all .25s; border:none; cursor:pointer;
  font-family:inherit; position:relative; overflow:hidden;
}
.btn-primary {
  background:linear-gradient(135deg,var(--accent),#3a75e0);
  color:#fff;
  box-shadow:0 2px 16px rgba(79,142,247,.25);
}
.btn-primary:hover {
  transform:translateY(-2px); color:#fff;
  box-shadow:0 6px 28px rgba(79,142,247,.35);
}
.btn-primary::after {
  content:''; position:absolute; top:0; left:-100%; width:100%; height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);
  transition:left .4s;
}
.btn-primary:hover::after { left:100%; }
.btn-secondary {
  background:var(--card); color:var(--text);
  border:1px solid var(--border);
}
.btn-secondary:hover {
  border-color:var(--accent); color:var(--accent);
  transform:translateY(-2px);
}

/* Scroll indicator */
.scroll-hint {
  display:flex; flex-direction:column; align-items:center;
  margin-top:56px; color:var(--text3);
}
.scroll-hint span { font-size:11px; letter-spacing:1px; text-transform:uppercase; margin-bottom:8px; }
.scroll-arrow {
  width:20px; height:20px; border-right:2px solid var(--text3);
  border-bottom:2px solid var(--text3); transform:rotate(45deg);
  animation:bounce 2s infinite;
}
@keyframes bounce {
  0%,100%{transform:rotate(45deg) translate(0,0); opacity:.4}
  50%{transform:rotate(45deg) translate(4px,4px); opacity:1}
}

/* ── Stats ── */
.stats {
  display:flex; justify-content:center; gap:48px;
  padding:48px 0; flex-wrap:wrap;
}
.stat { text-align:center; }
.stat-num {
  font-size:36px; font-weight:800; letter-spacing:-1px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-plus {
  font-size:24px; font-weight:700;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-label {
  display:block; font-size:12.5px; color:var(--text2);
  font-weight:500; margin-top:4px; letter-spacing:.3px;
}

/* ── Sections ── */
.section { padding:48px 0; }
.section-title {
  font-size:clamp(24px,3.5vw,32px);
  font-weight:800; letter-spacing:-.7px; margin-bottom:8px;
}
.section-subtitle { color:var(--text2); font-size:15px; margin-bottom:40px; }
.section-line {
  width:40px; height:3px; border-radius:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  margin-bottom:16px;
}

/* ── Cards (shared) ── */
.glass-card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:24px;
  transition:all .3s;
  position:relative; overflow:hidden;
}
.glass-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);
}
.theme-light .glass-card::before {
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.6),transparent);
}
.glass-card:hover {
  border-color:var(--border-h);
  background:var(--card-h);
  transform:translateY(-3px);
  box-shadow:var(--shadow);
}

/* ── Bento Grid ── */
.bento {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.bento-wide { grid-column:span 2; }
.bento-card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:28px;
  transition:all .3s;
  position:relative; overflow:hidden;
}
.bento-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.08),transparent);
}
.theme-light .bento-card::before {
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.5),transparent);
}
.bento-card:hover {
  border-color:var(--border-h);
  background:var(--card-h);
  transform:translateY(-3px);
  box-shadow:var(--shadow);
}
.bento-icon {
  width:40px; height:40px; border-radius:11px;
  background:var(--acbg);
  display:flex; align-items:center; justify-content:center;
  font-size:20px; margin-bottom:16px;
  border:1px solid rgba(79,142,247,.15);
}
.bento-card h3 {
  font-size:15px; font-weight:700; margin-bottom:8px; color:var(--text);
}
.bento-card p {
  font-size:13.5px; color:var(--text2); line-height:1.65; margin-bottom:14px;
}

/* Tags */
.tags { display:flex; flex-wrap:wrap; gap:7px; }
.tag {
  background:var(--tag-bg); color:var(--tag-text);
  padding:4px 11px; border-radius:var(--r-xs);
  font-size:11.5px; font-weight:500;
  border:1px solid rgba(79,142,247,.12);
  transition:all .2s;
}
.tag:hover {
  background:rgba(79,142,247,.18);
  border-color:rgba(79,142,247,.3);
}

/* ── Certificates ── */
.certs-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:14px;
}
.cert-card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:24px;
  transition:all .3s;
  position:relative; overflow:hidden;
}
.cert-card::after {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  opacity:0; transition:opacity .3s;
}
.cert-card:hover::after { opacity:1; }
.cert-card:hover {
  border-color:var(--border-h);
  background:var(--card-h);
  transform:translateY(-3px);
  box-shadow:var(--shadow);
}
.cert-icon {
  font-size:28px; margin-bottom:14px; display:block;
}
.cert-card h3 {
  font-size:15px; font-weight:700; margin-bottom:6px; color:var(--text);
}
.cert-card p {
  font-size:13px; color:var(--text2); line-height:1.6;
}

/* ── Projects ── */
.projects-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(340px,1fr));
  gap:16px;
}
.project-card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  overflow:hidden;
  transition:all .3s;
  display:flex; flex-direction:column;
}
.project-header {
  height:6px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  opacity:.6; transition:opacity .3s;
}
.project-card:hover .project-header { opacity:1; }
.project-body { padding:26px 26px 22px; flex:1; display:flex; flex-direction:column; }
.project-card:hover {
  border-color:var(--border-h);
  background:var(--card-h);
  transform:translateY(-4px);
  box-shadow:var(--shadow);
}
.project-year {
  font-size:11px; color:var(--accent);
  font-weight:600; text-transform:uppercase;
  letter-spacing:1.2px; margin-bottom:10px;
}
.project-card h3 {
  font-size:17px; font-weight:700; margin-bottom:10px; color:var(--text);
}
.project-card p {
  font-size:13.5px; color:var(--text2); line-height:1.7;
  margin-bottom:16px; flex:1;
}
.project-link {
  font-size:12.5px; font-weight:600; color:var(--accent);
  display:inline-flex; align-items:center; gap:5px;
}
.project-link:hover { gap:8px; }
.project-link svg { transition:transform .2s; }
.project-link:hover svg { transform:translateX(2px); }

/* ── Contact ── */
.contact-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:14px;
}
.contact-card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:24px;
  transition:all .3s;
  position:relative; overflow:hidden;
}
.contact-card:hover {
  border-color:var(--border-h);
  background:var(--card-h);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.contact-icon {
  font-size:22px; margin-bottom:12px; display:block;
}
.contact-card h3 {
  font-size:11px; font-weight:600; color:var(--text2);
  text-transform:uppercase; letter-spacing:1.2px;
  margin-bottom:8px;
}
.contact-card a,
.contact-card p {
  font-size:15px; color:var(--text); font-weight:500;
}

/* ── Legal ── */
.legal-content h2 {
  font-size:20px; font-weight:700; margin:36px 0 12px; color:var(--text);
}
.legal-content h3 {
  font-size:16px; font-weight:600; margin:24px 0 8px; color:var(--text);
}
.legal-content p {
  color:var(--text2); margin-bottom:12px; font-size:14.5px; line-height:1.75;
}
.legal-content ul {
  color:var(--text2); margin:8px 0 16px 24px; font-size:14.5px;
}
.legal-content li { margin-bottom:4px; }

/* ── Footer ── */
.footer {
  background:var(--foot-bg);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--border);
  padding:28px 0;
  margin-top:auto;
}
.footer .container {
  display:flex; justify-content:space-between;
  align-items:center; flex-wrap:wrap; gap:16px;
}
.footer-text { font-size:12.5px; color:var(--text3); }
.footer-links { display:flex; gap:20px; list-style:none; }
.footer-links a { font-size:12.5px; color:var(--text3); }
.footer-links a:hover { color:var(--text2); }

/* ── Animations ── */
.fade-in {
  opacity:0; transform:translateY(20px);
  transition:opacity .6s ease,transform .6s ease;
}
.fade-in.visible { opacity:1; transform:translateY(0); }
.fade-in.delay-1 { transition-delay:.1s; }
.fade-in.delay-2 { transition-delay:.2s; }
.fade-in.delay-3 { transition-delay:.3s; }
.fade-in.delay-4 { transition-delay:.4s; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:rgba(255,255,255,.1); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:rgba(255,255,255,.2); }
.theme-light ::-webkit-scrollbar-thumb { background:rgba(0,0,0,.12); }
.theme-light ::-webkit-scrollbar-thumb:hover { background:rgba(0,0,0,.2); }

/* ── Responsive ── */
@media(max-width:768px) {
  .container { padding:0 18px; }
  .hero { padding:50px 0 30px; }
  .hero h1 { font-size:32px; }
  .stats { gap:28px; }
  .stat-num { font-size:28px; }
  .bento { grid-template-columns:1fr; }
  .bento-wide { grid-column:span 1; }
  .projects-grid { grid-template-columns:1fr; }
  .nav-links {
    display:none; position:absolute;
    top:60px; left:0; right:0;
    background:var(--nav-bg);
    backdrop-filter:blur(20px);
    flex-direction:column;
    padding:12px 18px 16px;
    gap:4px;
    border-bottom:1px solid var(--border);
  }
  .nav-links.open { display:flex; }
  .nav-links a { padding:10px 14px; border-radius:8px; }
  .nav-toggle { display:flex; flex-direction:column; align-items:center; justify-content:center; }
  .nav-toggle.open span:nth-child(1) { transform:rotate(45deg) translate(4px,4px); }
  .nav-toggle.open span:nth-child(2) { opacity:0; }
  .nav-toggle.open span:nth-child(3) { transform:rotate(-45deg) translate(4px,-4px); }
  .footer .container { flex-direction:column; text-align:center; }
}
@media(max-width:480px) {
  .hero h1 { font-size:26px; letter-spacing:-1px; }
  .hero p { font-size:15px; }
  .bento-card { padding:20px; }
  .stats { gap:20px; }
}