/* ===== KI Referat – Landing Page Styles ===== */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

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

:root {
  --bg-dark: #0b0e1a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --accent-1: #7c3aed;
  --accent-2: #06b6d4;
  --accent-3: #f43f5e;
  --text-primary: #f1f5f9;
  --text-muted: #94a3b8;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --radius: 20px;
  --transition: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* ---------- Navigation Dots ---------- */
.nav-dots {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 100;
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--glass);
  border: 2px solid var(--glass-border);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.nav-dot::after {
  content: attr(data-label);
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.85);
  color: var(--text-primary);
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.nav-dot:hover::after { opacity: 1; }

.nav-dot.active {
  background: var(--accent-1);
  border-color: var(--accent-1);
  transform: scale(1.35);
  box-shadow: 0 0 12px var(--accent-1);
}

/* ---------- Progress Bar ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-3));
  z-index: 200;
  transition: width 0.3s ease;
}

/* ---------- Slide Sections ---------- */
.slide {
  min-height: 100vh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 40px;
  position: relative;
  overflow: hidden;
}

.slide::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.45;
  z-index: 0;
  pointer-events: none;
}

/* unique gradients per section */
#slide-1::before { background: radial-gradient(ellipse at 30% 20%, #7c3aed44 0%, transparent 60%),
                               radial-gradient(ellipse at 70% 80%, #06b6d444 0%, transparent 60%); }
#slide-2::before { background: radial-gradient(ellipse at 50% 50%, #f59e0b33 0%, transparent 70%); }
#slide-3::before { background: radial-gradient(ellipse at 20% 60%, #10b98133 0%, transparent 60%),
                               radial-gradient(ellipse at 80% 30%, #3b82f633 0%, transparent 60%); }
#slide-4::before { background: radial-gradient(ellipse at 60% 40%, #ef444433 0%, transparent 60%),
                               radial-gradient(ellipse at 20% 80%, #7c3aed33 0%, transparent 60%); }
#slide-5::before { background: radial-gradient(ellipse at 40% 30%, #8b5cf633 0%, transparent 60%),
                               radial-gradient(ellipse at 70% 70%, #06b6d433 0%, transparent 60%); }
#slide-6::before { background: radial-gradient(ellipse at 50% 30%, #a855f733 0%, transparent 60%),
                               radial-gradient(ellipse at 30% 80%, #ec489933 0%, transparent 60%); }
#slide-7::before { background: radial-gradient(ellipse at 60% 50%, #3b82f633 0%, transparent 60%); }
#slide-8::before { background: radial-gradient(ellipse at 40% 60%, #f43f5e33 0%, transparent 60%); }
#slide-9::before { background: radial-gradient(ellipse at 50% 50%, #7c3aed33 0%, transparent 50%),
                               radial-gradient(ellipse at 50% 50%, #06b6d422 0%, transparent 70%); }

/* ---------- Slide Inner Layout ---------- */
.slide-inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.slide-inner.centered {
  grid-template-columns: 1fr;
  text-align: center;
  justify-items: center;
}

/* ---------- Text Content ---------- */
.slide-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent-2);
  background: rgba(6, 182, 212, 0.1);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.slide-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.slide-text {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 540px;
}

.slide-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---------- Image Card ---------- */
.slide-image-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  max-width: 440px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.slide-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-image-wrap:hover img {
  transform: scale(1.05);
}

/* glow ring behind image */
.slide-image-wrap::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  z-index: -1;
  opacity: 0;
  transition: opacity 0.6s;
}

.slide-image-wrap:hover::before { opacity: 1; }

/* ---------- Hero (Slide 1) Special ---------- */
.hero-title {
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, var(--accent-1) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  padding: 10px 24px;
  font-size: 0.9rem;
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

/* ---------- Scroll Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s var(--transition), transform 0.8s var(--transition);
}

.reveal.from-left {
  transform: translateX(-60px);
}

.reveal.from-right {
  transform: translateX(60px);
}

.reveal.scale-in {
  transform: scale(0.85);
}

.reveal.visible {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* stagger children */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- Section Divider ---------- */
.section-label {
  position: absolute;
  top: 28px;
  left: 40px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-muted);
  opacity: 0.5;
  z-index: 1;
}

/* ---------- Final Slide (Questions) ---------- */
.questions-image {
  max-width: 280px;
  margin-bottom: 24px;
  filter: drop-shadow(0 0 40px rgba(124, 58, 237, 0.4));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* ---------- Floating Particles ---------- */
.particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.4);
  animation: drift linear infinite;
}

@keyframes drift {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

/* ---------- Scroll CTA ---------- */
.scroll-cta {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce-down 2s infinite;
}

.scroll-cta .arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
}

@keyframes bounce-down {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .slide { padding: 40px 20px; }

  .slide-inner {
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
  }

  .slide-image-wrap {
    max-width: 300px;
    margin: 0 auto;
  }

  .slide-text { max-width: 100%; }

  .nav-dots { right: 12px; gap: 10px; }
  .nav-dot { width: 8px; height: 8px; }
  .nav-dot::after { display: none; }

  .section-label { display: none; }

  .hero-title { font-size: 2.2rem; }
  .questions-image { max-width: 180px; }
}

@media (max-width: 480px) {
  .slide-image-wrap { max-width: 240px; }
  .hero-title { font-size: 1.8rem; }
}