/* =============================================================
   ExpoTech 2026 — Design tokens
   ============================================================= */
:root{
  /* Color */
  --bg:            #0A0E17;
  --surface:       #121828;
  --surface-2:     #182140;
  --border:        #232C46;
  --text:          #EDEFF5;
  --text-muted:    #8891A8;
  --cyan:          #4CE0D2;
  --violet:        #8B7FFF;
  --amber:         #FFB454;
  --danger:        #FF6B6B;

  /* Type */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Layout */
  --container: 1180px;
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 24px;
}

*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  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{ list-style: none; margin: 0; padding: 0; }
button{ font-family: inherit; cursor: pointer; }

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

.accent{ color: var(--cyan); }

:focus-visible{
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  html{ scroll-behavior: auto; }
}

/* =============================================================
   Buttons
   ============================================================= */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover{ transform: translateY(-2px); }

.btn-primary{
  background: linear-gradient(135deg, var(--cyan), #2FBFAF);
  color: #04211D;
  box-shadow: 0 8px 24px rgba(76, 224, 210, 0.25);
}
.btn-primary:hover{ box-shadow: 0 12px 28px rgba(76, 224, 210, 0.35); }

.btn-ghost{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--cyan); color: var(--cyan); }

.btn-nav{
  padding: 10px 20px;
  font-size: 0.85rem;
}

.btn-block{ width: 100%; justify-content: center; }

/* =============================================================
   Header
   ============================================================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo{ display: flex; align-items: center; gap: 10px; }

.logo-mark{
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  color: #04141F;
  font-size: 1.1rem;
}

.logo-text{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.logo-year{
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
}

.primary-nav{
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link{
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s ease;
}
.nav-link:hover{ color: var(--text); }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
}
.nav-toggle span{
  display: block;
  height: 2px;
  margin-inline: 9px;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.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); }

/* =============================================================
   Hero
   ============================================================= */
.hero{
  position: relative;
  overflow: hidden;
  padding: 96px 0 110px;
}

.hero-grid{
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 60% 20%, black 10%, transparent 70%);
  opacity: 0.5;
}

.hero-inner{
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 22px;
}
.eyebrow-dot{
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(76, 224, 210, 0.15);
}

.hero-title{
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}

.accent-underline{
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(76, 224, 210, 0.35);
  text-underline-offset: 6px;
  text-decoration-thickness: 3px;
}

.hero-subtitle{
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 46ch;
  margin: 0 0 34px;
}

.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-meta{
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.hero-meta-item{
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.hero-meta-item i{ color: var(--violet); }

/* ----- Terminal / countdown panel ----- */
.terminal{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6);
}

.terminal-bar{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.dot{ width: 10px; height: 10px; border-radius: 50%; }
.dot-r{ background: #FF5F57; }
.dot-y{ background: #FEBC2E; }
.dot-g{ background: #28C840; }
.terminal-title{
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.terminal-body{ padding: 28px; }

.terminal-line{
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0 0 22px;
}
.prompt{ color: var(--cyan); margin-right: 8px; }

.countdown{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 22px;
}
.countdown-unit{
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 14px 4px;
  text-align: center;
}
.countdown-value{
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--cyan);
}
.countdown-label{
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.terminal-status{ margin: 0; }
.status-ok{ color: var(--amber); }

/* =============================================================
   Section shared
   ============================================================= */
section{ padding: 108px 0; }

.section-eyebrow{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--violet);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}

.section-title{
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  max-width: 22ch;
}

.section-subtitle{
  color: var(--text-muted);
  max-width: 58ch;
  font-size: 1.02rem;
  margin: 0 0 56px;
}

/* =============================================================
   Ponentes
   ============================================================= */
.ponentes{
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.speakers-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.speaker-card{
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 32px 26px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.speaker-card:hover{
  transform: translateY(-6px);
  border-color: var(--cyan);
}

.speaker-avatar{
  width: 56px;
  height: 56px;
  border-radius: var(--radius-s);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}
.avatar-cyan{ background: rgba(76, 224, 210, 0.14); color: var(--cyan); }
.avatar-violet{ background: rgba(139, 127, 255, 0.14); color: var(--violet); }
.avatar-amber{ background: rgba(255, 180, 84, 0.14); color: var(--amber); }

.speaker-name{
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 4px;
}

.speaker-role{
  font-size: 0.85rem;
  color: var(--cyan);
  margin: 0 0 14px;
  font-weight: 500;
}

.speaker-bio{
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0 0 22px;
}

.speaker-social{ display: flex; gap: 12px; }
.speaker-social a{
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: border-color 0.15s ease, color 0.15s ease;
}
.speaker-social a:hover{ border-color: var(--cyan); color: var(--cyan); }

/* =============================================================
   Inscripción
   ============================================================= */
.inscripcion-inner{
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: start;
}

.inscripcion-list{ margin-top: 30px; }
.inscripcion-list li{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.96rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.inscripcion-list i{ color: var(--cyan); margin-top: 3px; }

.form-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 36px;
}

.form-group{ margin-bottom: 22px; }
.form-group label{
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.form-group input,
.form-group select{
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-s);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-group input::placeholder{ color: #566079; }
.form-group input:focus,
.form-group select:focus{
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(76, 224, 210, 0.15);
}
.form-group select{ appearance: none; background-image: none; }

.form-group.has-error input,
.form-group.has-error select{
  border-color: var(--danger);
}

.form-error{
  display: block;
  min-height: 18px;
  font-size: 0.78rem;
  color: var(--danger);
  margin-top: 6px;
}

/* =============================================================
   Footer
   ============================================================= */
.site-footer{
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-top: 64px;
}

.footer-inner{
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
}

.footer-tagline{
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-top: 14px;
  max-width: 34ch;
}

.footer-contact h4,
.footer-social h4{
  font-family: var(--font-display);
  font-size: 0.95rem;
  margin: 0 0 18px;
  color: var(--text);
}

.footer-contact p{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 12px;
}
.footer-contact i{ color: var(--cyan); width: 16px; }

.social-icons{ display: flex; gap: 12px; }
.social-icons a{
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--text-muted);
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.social-icons a:hover{
  border-color: var(--violet);
  color: var(--violet);
  transform: translateY(-3px);
}

.footer-bottom{
  border-top: 1px solid var(--border);
  padding: 22px 24px;
  text-align: center;
}
.footer-bottom p{
  margin: 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* =============================================================
   Responsive
   ============================================================= */
@media (max-width: 960px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero{ padding: 64px 0 72px; }
  .inscripcion-inner{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr 1fr; }
  .footer-brand{ grid-column: 1 / -1; }
  .speakers-grid{ grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px){
  .nav-toggle{ display: flex; }

  .primary-nav{
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 20px;
    transform: translateY(-130%);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }
  .primary-nav.open{ transform: translateY(0); opacity: 1; }
  .primary-nav .nav-link{ padding: 14px 0; border-bottom: 1px solid var(--border); }
  .primary-nav .btn-nav{ margin-top: 16px; text-align: center; justify-content: center; }

  .speakers-grid{ grid-template-columns: 1fr; }
  .countdown{ grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .countdown-value{ font-size: 1.3rem; }
  section{ padding: 76px 0; }
  .form-card{ padding: 26px; }
  .footer-inner{ grid-template-columns: 1fr; }
}