/* ==========================================================================
   Digital Summit Zürich — Musterprojekt / PixelSeite Portfolio-Demo
   Reines CSS3, keine externen Requests, kein Framework.
   ========================================================================== */

:root {
  /* Farben: dunkles Navy + Lime/Chartreuse-Akzent */
  --navy-950: #060a14;
  --navy-900: #0a0f1e;
  --navy-800: #101830;
  --navy-700: #172140;
  --navy-600: #223056;
  --navy-border: #24304f;

  --accent: #c8ff3d;
  --accent-2: #7cf29c;
  --accent-dark: #9fe015;

  --text: #eef2fb;
  --text-muted: #a9b3cc;
  --text-faint: #6c7796;

  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;

  --radius: 14px;
  --radius-sm: 8px;
  --container: 1160px;

  --shadow-soft: 0 20px 60px -20px rgba(0, 0, 0, 0.6);
}

/* ---- Reset ---- */
* , *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--navy-900);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; margin: 0; line-height: 1.15; }
p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--navy-950);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  z-index: 999;
}
.skip-link:focus { left: 16px; top: 16px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--navy-950);
  box-shadow: 0 10px 30px -8px rgba(200, 255, 61, 0.45);
}
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -8px rgba(200, 255, 61, 0.6); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--navy-border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-lg { padding: 16px 30px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--navy-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.logo span { color: var(--accent); }
.logo small {
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-left: 6px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.main-nav ul { display: flex; gap: 28px; }
.main-nav a:not(.btn) {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 4px 0;
  transition: color .15s ease;
}
.main-nav a:not(.btn):hover { color: var(--text); }
.main-nav a:not(.btn)::after {
  content: '';
  position: absolute;
  left: 0; right: 100%; bottom: -2px;
  height: 2px;
  background: var(--accent);
  transition: right .2s ease;
}
.main-nav a:not(.btn):hover::after { right: 0; }

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--navy-border);
  background: var(--navy-800);
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin-inline: auto;
  background: var(--text);
  transition: transform .25s ease, opacity .25s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero ---- */
.hero {
  position: relative;
  padding: 120px 0 100px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; }
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
}
.hero-glow-1 {
  width: 520px; height: 520px;
  background: var(--accent);
  top: -220px; left: 10%;
}
.hero-glow-2 {
  width: 420px; height: 420px;
  background: var(--accent-2);
  top: -140px; right: 5%;
  opacity: 0.2;
}

.hero-inner { text-align: center; max-width: 780px; }
.eyebrow {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--navy-border);
  background: var(--navy-800);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  margin-bottom: 28px;
}
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.5rem); letter-spacing: -0.02em; }
.hero-title-line { display: block; }
.hero-title-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  display: block;
  margin: 26px auto 0;
  max-width: 600px;
  font-size: 1.1rem;
  color: var(--text-muted);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 38px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 52px;
  margin-top: 68px;
  flex-wrap: wrap;
}
.hero-stats > div { text-align: center; }
.hero-stats dt {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}
.hero-stats dd {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid var(--navy-border);
  border-radius: 999px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-hint span {
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  animation: scrollHint 1.8s ease infinite;
}
@keyframes scrollHint {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(12px); }
  100% { opacity: 0; }
}

/* ---- Sections ---- */
.section { padding: 110px 0; }
.section-alt { background: var(--navy-950); }
.section-eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  letter-spacing: -0.01em;
  max-width: 640px;
}
.section-lead {
  display: block;
  margin-top: 18px;
  max-width: 620px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ---- Timeline ---- */
.timeline {
  margin-top: 60px;
  position: relative;
  border-left: 2px solid var(--navy-border);
  padding-left: 40px;
}
.timeline-item { position: relative; padding-bottom: 46px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -46px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--navy-900), 0 0 0 6px var(--navy-border);
}
.timeline-time {
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.timeline-content h3 { font-size: 1.2rem; margin-bottom: 8px; }
.timeline-content p { color: var(--text-muted); max-width: 560px; }

/* ---- Speaker ---- */
.speaker-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.speaker-card {
  background: var(--navy-800);
  border: 1px solid var(--navy-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform .2s ease, border-color .2s ease;
}
.speaker-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--navy-950);
}
.avatar-1 { background: linear-gradient(135deg, #c8ff3d, #6ee7b7); }
.avatar-2 { background: linear-gradient(135deg, #7cf29c, #34d0c6); }
.avatar-3 { background: linear-gradient(135deg, #a3ff5c, #38bdf8); color: #06101f; }
.avatar-4 { background: linear-gradient(135deg, #d9ff6b, #7ce0a3); }
.avatar-5 { background: linear-gradient(135deg, #8bf3b0, #c8ff3d); }
.avatar-6 { background: linear-gradient(135deg, #baff5c, #4fd3c4); }
.speaker-card h3 { font-size: 1.1rem; margin-bottom: 4px; }
.speaker-role { color: var(--text-muted); font-size: 0.9rem; }

/* ---- Tickets ---- */
.ticket-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}
.ticket-card {
  background: var(--navy-800);
  border: 1px solid var(--navy-border);
  border-radius: var(--radius);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.ticket-featured {
  background: linear-gradient(160deg, var(--navy-700), var(--navy-800));
  border-color: var(--accent);
  box-shadow: var(--shadow-soft);
  transform: translateY(-10px);
}
.ticket-badge {
  position: absolute;
  top: -14px;
  left: 30px;
  background: var(--accent);
  color: var(--navy-950);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.ticket-card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.ticket-price { margin-bottom: 22px; }
.ticket-price span {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--accent);
}
.ticket-price small { color: var(--text-faint); margin-left: 6px; }
.ticket-features { margin-bottom: 30px; flex-grow: 1; }
.ticket-features li {
  padding: 9px 0;
  border-top: 1px solid var(--navy-border);
  color: var(--text-muted);
  font-size: 0.95rem;
  padding-left: 26px;
  position: relative;
}
.ticket-features li:first-child { border-top: none; }
.ticket-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}

/* ---- Anfahrt ---- */
.anfahrt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.contact-list { margin-top: 32px; display: grid; gap: 22px; }
.contact-list dt {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.contact-list dd { margin: 0; color: var(--text-muted); }
.contact-list a { color: var(--text); font-weight: 600; }
.contact-list a:hover { color: var(--accent); }

.map-placeholder {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  border: 1px solid var(--navy-border);
  background:
    linear-gradient(135deg, rgba(200,255,61,0.08), transparent 60%),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 32px),
    var(--navy-800);
  overflow: hidden;
}
.map-pin {
  position: absolute;
  top: 42%;
  left: 55%;
  width: 22px;
  height: 22px;
  border-radius: 50% 50% 50% 0;
  transform: translate(-50%, -100%) rotate(-45deg);
  background: var(--accent);
  box-shadow: 0 0 0 8px rgba(200,255,61,0.15);
}
.map-pin::after {
  content: '';
  position: absolute;
  inset: 6px;
  background: var(--navy-950);
  border-radius: 50%;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--navy-border);
  padding: 36px 0;
  background: var(--navy-950);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 0.88rem;
}
.footer-note strong { color: var(--text-muted); }

/* ---- Scroll reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .speaker-grid { grid-template-columns: repeat(2, 1fr); }
  .ticket-grid { grid-template-columns: 1fr; }
  .ticket-featured { transform: none; }
  .anfahrt-grid { grid-template-columns: 1fr; }
  .map-placeholder { order: -1; }
}

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    inset: 76px 0 0 0;
    background: var(--navy-950);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 32px 24px;
    gap: 28px;
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 90;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 22px; }
  .main-nav a:not(.btn) { font-size: 1.15rem; }
  .nav-cta { align-self: flex-start; }
  .menu-toggle { display: flex; }

  .hero { padding: 90px 0 70px; }
  .hero-stats { gap: 32px; }
  .section { padding: 76px 0; }
  .speaker-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-hint span { animation: none; }
}