/* =========================================================
   ZDevSummit 2026 — Design System
   Stack: vanilla HTML/CSS/JS · no build step required
   ========================================================= */

/* ----------------------------------------------------------
   01. CSS CUSTOM PROPERTIES
   ---------------------------------------------------------- */
:root {
  /* Palette */
  --color-bg-deep:        #080e24;
  --color-bg-section:     #0c1535;
  --color-bg-card:        #111c3a;
  --color-bg-card-hover:  #162248;
  --color-accent-cyan:    #00d4ff;
  --color-accent-violet:  #7c3aed;
  --color-accent-magenta: #e040fb;
  --color-accent-indigo:  #4f46e5;
  --color-text-primary:   #f0f4ff;
  --color-text-secondary: #94a3c0;
  --color-text-muted:     #5a6a8a;
  --color-border:         rgba(0, 212, 255, 0.12);
  --color-border-hover:   rgba(0, 212, 255, 0.35);
  --color-glow-cyan:      rgba(0, 212, 255, 0.18);
  --color-glow-violet:    rgba(124, 58, 237, 0.18);

  /* Light section (Reference B) */
  --color-light-bg:       #f8faff;
  --color-light-text:     #111827;
  --color-light-sub:      #374151;

  /* Gradients */
  --grad-accent:    linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-violet), var(--color-accent-magenta));
  --grad-card-top:  linear-gradient(180deg, rgba(0,212,255,0.08) 0%, transparent 100%);
  --grad-hero-bg:   linear-gradient(135deg, #080e24 0%, #0c1535 60%, #130b2e 100%);

  /* Typography */
  --font-display: 'Museo Sans', 'Segoe UI', system-ui, sans-serif;
  --font-body:    'Museo Sans', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Spacing */
  --section-py: clamp(64px, 8vw, 120px);
  --card-radius: 16px;
  --pill-radius: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 240ms ease-out;
  --transition-logo: 800ms ease-in-out;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.35), 0 0 0 1px var(--color-border);
  --shadow-glow-cyan: 0 0 24px rgba(0,212,255,0.25);
  --shadow-glow-violet: 0 0 24px rgba(124,58,237,0.25);
}

/* ----------------------------------------------------------
   02. RESET / BASE
   ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-deep);
  overflow-x: hidden;
  max-width: 100vw;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* Focus visible — accessible */
:focus-visible {
  outline: 2px solid var(--color-accent-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* prefers-reduced-motion: reduce duration instead of killing animations */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration:       0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration:      0.01ms !important;
    scroll-behavior:          auto !important;
  }
  /* Logo entrance is JS-managed and intentional — restore its transition */
  .logo-anim {
    transition: opacity 0.9s ease-out, transform 0.9s cubic-bezier(0.22,1,0.36,1) !important;
  }
}

/* ----------------------------------------------------------
   03. TYPOGRAPHY
   ---------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-primary);
}

.text-gradient {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--pill-radius);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--grad-accent);
  color: #fff;
  transition: filter var(--transition-fast), transform var(--transition-fast);
}
.tag-pill:hover { filter: brightness(1.1); transform: translateY(-1px); }

.tag-pill-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-accent-cyan);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.tag-pill-outline:hover {
  border-color: var(--color-accent-cyan);
  background: rgba(0,212,255,0.07);
}

/* ----------------------------------------------------------
   04. LAYOUT UTILITIES
   ---------------------------------------------------------- */
.container-2026 {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.section-2026 {
  padding-block: var(--section-py);
  position: relative;
  overflow: hidden;
}

.section-dark  { background: var(--color-bg-deep); }
.section-mid   { background: var(--color-bg-section); }
.section-light {
  background: var(--color-light-bg);
  color: var(--color-light-text);
}
.section-light h1,
.section-light h2,
.section-light h3 { color: var(--color-light-text); }
.section-light p   { color: var(--color-light-sub); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-cyan);
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-accent-cyan);
  border-radius: 2px;
}

.section-title-2026 {
  font-size: clamp(28px, 4vw, 48px);
  margin-bottom: 16px;
}

.section-intro {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: 48px;
  line-height: 1.7;
}

/* ----------------------------------------------------------
   05. SCROLL-REVEAL
   ---------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
.reveal-delay-5 { transition-delay: 400ms; }
.reveal-delay-6 { transition-delay: 480ms; }

/* ----------------------------------------------------------
   06. NAVBAR 2026
   ---------------------------------------------------------- */
.nav-2026 {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 clamp(16px, 4vw, 48px);
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav-2026.scrolled {
  background: rgba(8,14,36,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-logo { display: flex; align-items: center; }
.nav-logo img { height: 88px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 14px; right: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--color-text-primary); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-cta {
  padding: 10px 22px;
  border-radius: var(--pill-radius);
  background: var(--color-accent-cyan);
  color: var(--color-bg-deep);
  font-size: 14px;
  font-weight: 700;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-cyan);
  filter: brightness(1.08);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(8,14,36,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.nav-drawer.open {
  display: flex;
  opacity: 1;
}
.nav-drawer .nav-link {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text-primary);
}

/* ----------------------------------------------------------
   07. LOGO ANIMATION — entrance + interference loop
   ---------------------------------------------------------- */
.logo-anim {
  display: block;
  height: 56px;
  width: auto;
  opacity: 0;
  transform: translateY(-14px) scale(0.9);
  transition: opacity 0.9s ease-out, transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.logo-anim.is-visible {
  opacity: 1;
  transform: none;
}

.logo-anim-hero  { height: 88px; }
.logo-anim-footer{ height: 50px; }

.speaker-role {
  font-size: 11px;
  color: var(--color-text-secondary);
  margin: 2px 0 6px;
  opacity: 0.8;
  letter-spacing: 0.02em;
}

/* Interference: 4s loop — glitch bursts at 55%, 70%, 90% */
@keyframes logo-interference {
  0%         { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  54%        { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  /* burst 1 — cyan split */
  55%        { filter: brightness(2)    hue-rotate(180deg)  saturate(5)     drop-shadow(4px  0 #00d4ff) drop-shadow(-4px 0 #e040fb); transform: translateX(-5px)  scaleX(1.04); opacity: 0.85; }
  56%        { filter: brightness(0.4)  hue-rotate(-40deg)  saturate(0);    transform: translateX(6px)   scaleX(0.97); opacity: 1;   }
  57%        { filter: brightness(1.8)  hue-rotate(220deg)  saturate(6)     drop-shadow(-4px 0 #7c3aed) drop-shadow(3px  0 #00d4ff); transform: translateX(-2px)  scaleX(1);    opacity: 0.9;  }
  58%        { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  69%        { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  /* burst 2 — violet flash */
  70%        { filter: brightness(2.2)  hue-rotate(90deg)   saturate(4)     drop-shadow(0 0 14px #7c3aed); transform: translateX(4px)  scaleX(1.03); opacity: 0.8;  }
  71%        { filter: brightness(0.3)  hue-rotate(270deg)  saturate(0.1);  transform: translateX(-5px) scaleX(0.96); opacity: 1;   }
  72%        { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  89%        { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  /* burst 3 — small flicker */
  90%        { filter: brightness(1.6)  hue-rotate(60deg)   saturate(3)     drop-shadow(2px 0 #e040fb); transform: translateX(-2px) scaleX(1);    opacity: 0.9;  }
  91%        { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
  100%       { filter: brightness(1)    hue-rotate(0deg)    saturate(1);    transform: translateX(0)   scaleX(1);    opacity: 1;   }
}

/* ----------------------------------------------------------
   07b. HERO TITLE GLITCH — toggled via JS class
   ---------------------------------------------------------- */
.hero-title { cursor: default; }

@keyframes title-glitch {
  0%   { transform: none;                         text-shadow: none; }
  10%  { transform: translateX(-4px) skewX(-2deg); text-shadow:  4px 0 #00d4ff, -4px 0 #e040fb; }
  20%  { transform: translateX( 5px) skewX( 1deg); text-shadow: -3px 0 #00d4ff,  4px 0 #7c3aed; }
  30%  { transform: translateX(-3px) skewX(-1deg); text-shadow:  3px 0 #e040fb,  -2px 0 #00d4ff; }
  40%  { transform: translateX( 4px);              text-shadow: -2px 0 #00d4ff; }
  50%  { transform: none;                          text-shadow: none; }
  60%  { transform: translateX(-2px) skewX(-1deg); text-shadow:  3px 0 #7c3aed, -3px 0 #00d4ff; }
  70%  { transform: translateX( 3px);              text-shadow: -2px 0 #e040fb; }
  80%  { transform: translateX(-2px);              text-shadow:  2px 0 #00d4ff; }
  90%  { transform: none;                          text-shadow: none; }
  100% { transform: none;                          text-shadow: none; }
}

.hero-title.glitch-active {
  animation-name:            title-glitch;
  animation-duration:        0.6s;
  animation-timing-function: linear;
  animation-fill-mode:       forwards;
  animation-iteration-count: 1;
}

/* ----------------------------------------------------------
   08. HERO
   ---------------------------------------------------------- */
.hero-2026 {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: var(--grad-hero-bg);
  padding-top: 68px;
  overflow: hidden;
}

/* Circuit SVG background */
.hero-circuit {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
}

/* Gradient orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-orb-1 {
  width: 500px; height: 500px;
  top: -100px; right: -100px;
  background: radial-gradient(circle, rgba(124,58,237,0.35) 0%, transparent 70%);
}
.hero-orb-2 {
  width: 400px; height: 400px;
  bottom: -80px; left: -80px;
  background: radial-gradient(circle, rgba(0,212,255,0.2) 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.0;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: 1.65;
  margin-bottom: 40px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
  align-items: center;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--pill-radius);
  background: rgba(0,212,255,0.04);
}
.hero-meta-item svg { color: var(--color-accent-cyan); flex-shrink: 0; }

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* CTAs */
.btn-primary-2026 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--pill-radius);
  background: var(--color-accent-cyan);
  color: var(--color-bg-deep);
  font-size: 15px;
  font-weight: 700;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}
.btn-primary-2026:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0,212,255,0.35);
  filter: brightness(1.07);
}

.btn-secondary-2026 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--pill-radius);
  background: transparent;
  border: 1.5px solid var(--color-border-hover);
  color: var(--color-text-primary);
  font-size: 15px;
  font-weight: 600;
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}
.btn-secondary-2026:hover {
  border-color: var(--color-accent-cyan);
  background: rgba(0,212,255,0.06);
  transform: translateY(-1px);
}

.btn-ghost-2026 {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 8px 4px;
  transition: color var(--transition-fast);
}
.btn-ghost-2026:hover { color: var(--color-accent-cyan); }
.btn-ghost-2026 svg { transition: transform var(--transition-fast); }
.btn-ghost-2026:hover svg { transform: translateX(3px); }

/* ----------------------------------------------------------
   09. LIGHT BREAK (Reference B — pill diagonals)
   ---------------------------------------------------------- */
.light-break {
  position: relative;
  background: var(--color-light-bg);
  color: var(--color-light-text);
  overflow: hidden;
}

.light-break-pills {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.lb-pill {
  position: absolute;
  border-radius: var(--pill-radius);
  opacity: 0.07;
  transform: rotate(-35deg);
}
.lb-pill-1 {
  width: 520px; height: 160px;
  background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-violet));
  top: -60px; left: -80px;
}
.lb-pill-2 {
  width: 400px; height: 120px;
  background: linear-gradient(135deg, var(--color-accent-violet), var(--color-accent-magenta));
  bottom: -40px; right: -60px;
}
.lb-pill-3 {
  width: 320px; height: 90px;
  background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-magenta));
  top: 40%; left: 50%;
  transform: rotate(-35deg) translateX(-50%);
  opacity: 0.04;
}

/* ----------------------------------------------------------
   10. WHY SECTION (3 bullets)
   ---------------------------------------------------------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.why-card {
  padding: 28px;
  border-radius: var(--card-radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.why-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-glow-cyan);
  border-color: var(--color-border-hover);
}
.why-card:focus-within {
  outline: 2px solid var(--color-accent-cyan);
  outline-offset: 2px;
}

.why-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0,212,255,0.1);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  color: var(--color-accent-cyan);
}

.why-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--color-text-primary);
}
.why-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ----------------------------------------------------------
   11. TRACK CARDS (Aree tematiche)
   ---------------------------------------------------------- */
.tracks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.track-card {
  position: relative;
  padding: 28px;
  border-radius: var(--card-radius);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.track-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.track-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(0,212,255,0.2);
  border-color: var(--color-border-hover);
}
.track-card:hover::before { opacity: 1; }

.track-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--color-bg-deep);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
}

.track-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-text-primary);
}
.track-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ----------------------------------------------------------
   12. AGENDA / SCHEDULE
   ---------------------------------------------------------- */
.agenda-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0;
}

.agenda-tab-btn {
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-muted);
  border-radius: 8px 8px 0 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  position: relative;
  bottom: -1px;
}
.agenda-tab-btn:hover { color: var(--color-text-primary); }
.agenda-tab-btn.active {
  color: var(--color-accent-cyan);
  border-bottom-color: var(--color-accent-cyan);
  background: rgba(0,212,255,0.05);
}

.agenda-panel { display: none; }
.agenda-panel.active { display: block; }

.timeline-2026 {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.timeline-item:last-child { border-bottom: none; }

.timeline-time {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-cyan);
  font-family: var(--font-mono);
  padding-top: 3px;
  white-space: nowrap;
}

.timeline-body h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}
.timeline-body .speaker-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--color-accent-cyan);
  margin-bottom: 6px;
}
.timeline-body p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.timeline-break .timeline-body h4 { color: var(--color-text-muted); font-style: italic; font-weight: 400; }

/* ----------------------------------------------------------
   13. SPEAKERS GRID
   ---------------------------------------------------------- */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.speaker-card-2026 {
  padding: 24px 20px;
  border-radius: var(--card-radius);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.speaker-card-2026:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-glow-violet);
  border-color: rgba(124,58,237,0.4);
}

.speaker-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 12px;
  border: 2px solid var(--color-border);
  background: var(--color-bg-deep);
  transition: border-color var(--transition-base);
}
.speaker-card-2026:hover .speaker-avatar { border-color: var(--color-accent-violet); }
.speaker-avatar img { width: 100%; height: 100%; object-fit: cover; }

.speaker-card-2026 h4 {
  font-size: 15px;
  margin-bottom: 4px;
}
.speaker-card-2026 small {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.4;
  display: block;
}

/* Gradient placeholder avatar (no image) */
.speaker-avatar-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  font-size: 24px; font-weight: 800;
  color: #fff; letter-spacing: -1px;
  border-radius: 50%;
  font-family: var(--font-display);
}

/* Inline speaker badges inside timeline rows */
.timeline-speakers { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 4px; }

.timeline-speaker-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px 3px 3px;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 999px;
  font-size: 12px; font-weight: 600;
  color: var(--color-text-secondary);
  transition: border-color var(--transition-base), background var(--transition-base), color var(--transition-base);
  cursor: default;
}
.timeline-speaker-badge:hover {
  border-color: rgba(0,212,255,0.45);
  background: rgba(0,212,255,0.12);
  color: var(--color-text-primary);
}

.timeline-speaker-badge-avatar {
  width: 22px; height: 22px; border-radius: 50%;
  overflow: hidden; flex-shrink: 0;
  background: var(--color-bg-deep);
}
.timeline-speaker-badge-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }

.mini-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #7c3aed 0%, #00d4ff 100%);
  font-size: 8px; font-weight: 800; color: #fff;
  letter-spacing: -0.3px; line-height: 1;
}

/* Team-building special row */
.timeline-teambuilding .timeline-time { color: #f87171; }
.timeline-teambuilding h4 { color: var(--color-text-primary); }

/* Speaker talk label */
.speaker-talk-label {
  font-size: 11px; color: var(--color-text-muted);
  margin-top: 2px; line-height: 1.35;
}

/* Expandable description (<details>) */
.talk-desc-expandable {
  margin: 4px 0 8px;
  border: none;
  outline: none;
}
.talk-desc-expandable > summary {
  font-size: 11px;
  color: var(--color-text-muted);
  line-height: 1.35;
  cursor: pointer;
  list-style: none;
  display: block;
}
.talk-desc-expandable > summary::-webkit-details-marker { display: none; }
.talk-desc-expandable > summary::marker { display: none; }
.talk-desc-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 5px;
  font-size: 10px;
  font-weight: 600;
  color: var(--color-accent-cyan);
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 20px;
  padding: 2px 10px;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s, border-color 0.2s;
}
.talk-desc-expandable[open] .talk-desc-toggle { background: rgba(0,212,255,0.12); border-color: rgba(0,212,255,0.35); }
.talk-desc-toggle::before { content: "↓ "; }
.talk-desc-expandable[open] .talk-desc-toggle::before { content: "↑ "; }
.talk-desc-body {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
}
.talk-desc-body p { margin-bottom: 6px; }
.talk-desc-body p:last-child { margin-bottom: 0; }
.talk-desc-motto {
  margin-top: 8px;
  font-style: italic;
  font-size: 11px;
  color: var(--color-accent-violet);
  opacity: 0.9;
}

/* Agenda note (📣 info callout) */
.talk-agenda-note {
  display: block;
  margin-top: 8px;
  padding: 7px 10px;
  background: rgba(0,212,255,0.06);
  border-left: 2px solid var(--color-accent-cyan);
  border-radius: 0 6px 6px 0;
  font-size: 11px;
  color: var(--color-text-secondary);
  line-height: 1.55;
  word-break: break-word;
}

/* Break sub-list */
.break-notes {
  margin: 5px 0 0 0;
  padding: 0;
  list-style: none;
  font-size: 11px;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.break-notes li::before {
  content: "→ ";
  color: var(--color-accent-cyan);
  font-weight: 600;
}

/* Empty state */
.speakers-coming-soon {
  grid-column: 1 / -1;
  padding: 56px 24px;
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--card-radius);
  color: var(--color-text-secondary);
}
.speakers-coming-soon h3 { font-size: 20px; margin-bottom: 10px; }
.speakers-coming-soon p  { font-size: 14px; }

/* ----------------------------------------------------------
   14. VIDEO SECTION
   ---------------------------------------------------------- */
.video-thumb {
  position: relative;
  border-radius: var(--card-radius);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-card);
  cursor: pointer;
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.video-thumb:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.video-thumb video,
.video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8,14,36,0.4);
  transition: background var(--transition-fast);
}
.video-play-btn:hover { background: rgba(8,14,36,0.2); }
.video-play-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--color-accent-cyan);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-bg-deep);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.video-thumb:hover .video-play-icon {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow-cyan);
}

/* ----------------------------------------------------------
   15. LOCATION SECTION
   ---------------------------------------------------------- */
.location-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px;
  border-radius: 24px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
}

.location-details h2 { font-size: clamp(24px, 3.5vw, 40px); margin-bottom: 16px; }
.location-details p  { color: var(--color-text-secondary); font-size: 15px; margin-bottom: 20px; }

.location-meta { display: flex; flex-wrap: wrap; gap: 8px; }

.location-map {
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-bg-deep);
}
.location-map iframe {
  width: 100%; height: 100%;
  border: none;
  filter: grayscale(0.3) invert(0.9) hue-rotate(180deg);
}

/* ----------------------------------------------------------
   16. FOOTER 2026
   ---------------------------------------------------------- */
.footer-2026 {
  background: #050a1a;
  border-top: 1px solid var(--color-border);
  padding: 48px 0 24px;
  overflow: hidden;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-logo { display: flex; align-items: center; }
.footer-logo img { height: 50px; width: auto; }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}
.footer-nav a {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 4px 8px;
  border-radius: 4px;
  transition: color var(--transition-fast);
}
.footer-nav a:hover { color: var(--color-text-primary); }

.footer-social {
  display: flex;
  gap: 8px;
}
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted);
  font-size: 14px;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}
.footer-social a:hover {
  color: var(--color-accent-cyan);
  border-color: var(--color-accent-cyan);
  background: rgba(0,212,255,0.06);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom span {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ----------------------------------------------------------
   17. CIRCUIT PATTERN (SVG nodes pulse)
   ---------------------------------------------------------- */
@keyframes node-pulse {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 1; }
}

.circuit-node { animation: node-pulse 2.8s ease-in-out infinite alternate; }
.circuit-node:nth-child(2) { animation-delay: 0.8s; }
.circuit-node:nth-child(3) { animation-delay: 1.6s; }
.circuit-node:nth-child(4) { animation-delay: 0.4s; }
.circuit-node:nth-child(5) { animation-delay: 2.1s; }

/* ----------------------------------------------------------
   18. EVENTS INDEX PAGE
   ---------------------------------------------------------- */
.events-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

.event-index-card {
  position: relative;
  padding: 36px 32px;
  border-radius: 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.event-index-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--grad-accent);
}
.event-index-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(0,212,255,0.2);
  border-color: var(--color-border-hover);
}

.event-index-card .year-badge {
  font-size: 48px;
  font-weight: 900;
  color: var(--color-text-primary);
  line-height: 1;
}
.event-index-card h3 {
  font-size: 22px;
}
.event-index-card .meta {
  font-size: 13px;
  color: var(--color-text-secondary);
}
.event-index-card .card-cta {
  margin-top: auto;
  padding-top: 8px;
}
.event-index-card.archived .year-badge { color: var(--color-text-muted); }

/* ----------------------------------------------------------
   19. MOBILE DRAWER ANIMATION
   ---------------------------------------------------------- */
@keyframes mob-drawer-in {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* ----------------------------------------------------------
   20. RESPONSIVE — Mobile-first enhancements
   ---------------------------------------------------------- */

/* === ≤ 1024px — tablet tweaks === */
@media (max-width: 1024px) {
  .location-card { grid-template-columns: 1fr; }
  .location-map  { aspect-ratio: 16 / 9; }
}

/* ═══════════════════════════════════════════════════════════
   MOBILE CORE — ≤ 768px
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* 0 · Palette boost for mobile */
  :root {
    --color-accent-cyan:    #00e5ff;
    --color-accent-violet:  #8b5cf6;
    --card-radius:          20px;
    --section-py:           clamp(52px, 10vw, 88px);
    --mob-glow-cyan:        rgba(0, 229, 255, 0.2);
  }

  /* 1 · Navbar */
  .nav-links { display: none; }
  .nav-cta   { display: none; }
  .nav-toggle { display: flex; }

  /* 2 · Fullscreen drawer — slide-in from right + gradient bg */
  .nav-drawer {
    background: linear-gradient(155deg, #060d20 0%, #0d1840 55%, #0f0824 100%);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    padding: 80px 36px 56px;
    opacity: 1;
    transform: translateX(100%);
    transition: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .nav-drawer.open {
    display: flex;
    animation: mob-drawer-in 260ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }
  .nav-drawer .nav-link {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--color-text-primary);
    padding: 13px 0;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .nav-drawer .nav-link::after { display: none; }
  .nav-drawer .btn-primary-2026 {
    margin-top: 28px;
    width: 100%;
    justify-content: center;
    font-size: 15px;
    padding: 14px 24px;
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-violet));
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.18);
  }

  /* 3 · Hero — more immersive, bottom-aligned content */
  .hero-2026 {
    padding-top: 68px;
    align-items: flex-end;
    padding-bottom: 52px;
    min-height: 100svh;
  }
  .hero-title {
    font-size: clamp(40px, 12vw, 64px);
    text-shadow: 0 0 80px rgba(0, 229, 255, 0.15);
    margin-bottom: 16px;
  }
  .hero-subtitle {
    font-size: 15px;
    margin-bottom: 24px;
    max-width: 100%;
    color: rgba(240, 244, 255, 0.72);
  }
  .hero-pills { gap: 6px; margin-bottom: 18px; }
  .hero-meta  { gap: 8px; margin-bottom: 24px; }
  .hero-ctas  {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: 100%;
    max-width: 440px;
  }
  .hero-orb-1 { width: 280px; height: 280px; top: -40px;  right: -60px; }
  .hero-orb-2 { width: 200px; height: 200px; bottom: 0;   left: -40px;  }

  /* CTAs — full-width gradient on mobile */
  .btn-primary-2026 {
    width: 100%;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-violet));
    color: #fff;
    padding: 15px 24px;
    font-size: 15px;
    box-shadow: 0 4px 24px rgba(0, 229, 255, 0.22);
  }
  .btn-secondary-2026 { width: 100%; justify-content: center; }
  .btn-ghost-2026     { justify-content: center; }

  /* 4 · Section visual rhythm — differentiate dark sections */
  .section-mid {
    background: linear-gradient(180deg, #101f42 0%, #0c1535 100%);
    border-top: 1px solid rgba(124, 58, 237, 0.15);
  }
  .section-dark {
    border-top: 1px solid rgba(0, 229, 255, 0.06);
  }
  .hero-2026 { border-top: none; }
  .light-break .lb-pill { opacity: 0.11; }

  /* 5 · Why cards — stacked with elevation */
  .why-grid { grid-template-columns: 1fr; gap: 12px; }
  .why-card {
    padding: 20px 18px;
    border-radius: 20px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.18);
  }

  /* 6 · Track cards */
  .tracks-grid { grid-template-columns: 1fr; gap: 10px; }
  .track-card  { padding: 20px 18px; border-radius: 20px; }

  /* 7 · Agenda tabs */
  .agenda-tabs    { overflow-x: auto; padding-bottom: 0; }
  .agenda-tab-btn { white-space: nowrap; padding: 10px 16px; font-size: 13px; }

  /* 8 · Timeline — full mobile redesign */
  .timeline-2026 {
    position: relative;
    padding-left: 22px;
  }
  /* Gradient vertical accent line */
  .timeline-2026::before {
    content: '';
    position: absolute;
    left: 4px; top: 4px; bottom: 4px;
    width: 2px;
    background: linear-gradient(
      180deg,
      var(--color-accent-cyan)    0%,
      var(--color-accent-violet)  50%,
      var(--color-accent-magenta) 100%
    );
    border-radius: 2px;
    opacity: 0.3;
  }

  .timeline-item {
    display: block;
    padding: 10px 0 10px 14px;
    border-bottom: none;
    position: relative;
    margin-bottom: 10px;
  }
  /* Colored node dot */
  .timeline-item::before {
    content: '';
    position: absolute;
    left: -18px; top: 20px;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--color-accent-cyan);
    box-shadow: 0 0 8px rgba(0, 229, 255, 0.55);
  }
  .timeline-break::before {
    background: rgba(90, 106, 138, 0.5);
    box-shadow: none;
    width: 6px; height: 6px;
    left: -17px; top: 18px;
  }
  .timeline-teambuilding::before {
    background: #f87171;
    box-shadow: 0 0 10px rgba(248, 113, 113, 0.55);
    width: 10px; height: 10px;
    left: -19px; top: 18px;
  }

  /* Time as pill badge */
  .timeline-time {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    background: rgba(0, 229, 255, 0.07);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: 999px;
    font-size: 11px;
    margin-bottom: 8px;
    white-space: nowrap;
  }

  /* Body as card */
  .timeline-body {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 13px 14px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
  }
  .timeline-body h4 { font-size: 14px; margin-bottom: 6px; }
  .timeline-body p  { font-size: 12px; }
  .timeline-break .timeline-body {
    background: rgba(255, 255, 255, 0.015);
    border-color: rgba(255, 255, 255, 0.05);
    box-shadow: none;
    padding: 10px 14px;
  }
  .timeline-teambuilding .timeline-body {
    border-color: rgba(248, 113, 113, 0.2);
    background: rgba(248, 113, 113, 0.04);
  }

  /* 9 · Speakers — 2-col + tap feedback */
  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .speaker-card-2026 {
    padding: 18px 12px;
    border-radius: 20px;
  }
  .speaker-card-2026:hover { transform: none; box-shadow: none; }
  .speaker-card-2026:active {
    transform: scale(0.97);
    transition: transform 80ms ease;
  }

  /* 10 · Location */
  .location-card {
    padding: 22px 18px;
    gap: 22px;
    border-radius: 22px;
  }

  /* 11 · Footer */
  .footer-top    { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-nav    { gap: 2px; }

  /* 12 · Reveal — shorter, snappier on mobile */
  .reveal {
    transform: translateY(16px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
  }
  .reveal-delay-1 { transition-delay: 40ms; }
  .reveal-delay-2 { transition-delay: 80ms; }
  .reveal-delay-3 { transition-delay: 120ms; }
  .reveal-delay-4 { transition-delay: 160ms; }
  .reveal-delay-5 { transition-delay: 200ms; }
  .reveal-delay-6 { transition-delay: 240ms; }
}

/* ═══════════════════════════════════════════════════════════
   SMALL MOBILE — ≤ 480px
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .hero-title         { font-size: clamp(36px, 13vw, 52px); }
  .section-title-2026 { font-size: clamp(22px, 7vw, 32px); }
  .speakers-grid      { grid-template-columns: 1fr; }
  .hero-ctas          { align-items: stretch; }
  .hero-meta          { flex-direction: column; align-items: flex-start; }
  .nav-drawer .nav-link { font-size: 22px; }
}