/* ================================================
   ASTRUM — SEDS ITBA · Light Theme
   Palette:
   --navy:     #1e1f45  (texto principal)
   --cyan:     #0096d6  (acento primario)
   --orange:   #f07030  (acento secundario)
   --purple:   #7b2d8b  (acento terciario)
   --lavender: #c8b8d8  (decorativo)
   --bg:       #ffffff  (fondo principal)
   --bg-soft:  #f4f5fb  (fondo secciones alt)
   ================================================ */

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

:root {
  --navy:       #1e1f45;
  --cyan:       #0096d6;
  --orange:     #f07030;
  --purple:     #7b2d8b;
  --lavender:   #c8b8d8;
  --bg:         #ffffff;
  --bg-soft:    #f4f5fb;
  --text:       #1e1f45;
  --text-mid:   #4a4c72;
  --text-muted: #8a8cb0;
  --border:     #e0e2f0;
  --white:      #ffffff;

  --font-display: 'Orbitron', monospace;
  --font-body:    'DM Sans', sans-serif;

  --nav-h: 72px;
  --container: 1180px;
  --radius: 12px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

#stars-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

section, nav, footer {
  position: relative;
  z-index: 1;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- NAV --- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 var(--border), 0 4px 24px rgba(30, 31, 69, 0.07);
}

.nav-logo {
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.logo-astrum {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--cyan);
}

.logo-by {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  font-weight: 400;
}

/* Ensure the nav logo image fits inside the navbar */
.nav-logo-img {
  max-height: calc(var(--nav-h) - 16px); /* leave room for padding */
  width: auto;
  display: block;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-mid);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--purple); }

.nav-cta {
  background: transparent !important;
  border: 1.5px solid var(--cyan) !important;
  color: var(--cyan) !important;
  padding: 0.45rem 1.1rem;
  border-radius: 4px;
  font-family: var(--font-display);
  font-size: 0.7rem !important;
  letter-spacing: 0.12em;
  transition: background var(--transition), color var(--transition) !important;
}

.nav-cta:hover {
  background: var(--cyan) !important;
  color: var(--white) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-mid);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- HERO --- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--nav-h) 2rem 6rem;
  overflow: hidden;
  background: linear-gradient(160deg, #eef3ff 0%, #ffffff 55%, #fef4ee 100%);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,150,214,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,150,214,0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 150, 214, 0.25);
  border-radius: 100px;
  padding: 0.4rem 1.1rem;
  font-size: 0.78rem;
  color: var(--text-mid);
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(30, 31, 69, 0.08);
}

.badge-dot {
  width: 7px; height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(1.4); }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 10vw, 8rem);
  line-height: 0.9;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--navy) 0%, var(--cyan) 50%, var(--purple) 100%);  
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-mid);
  font-weight: 400;
  line-height: 1.6;
  margin-bottom: 2.5rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-date {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--navy);
  background: white;
  border-radius: 8px;
  padding: 0.9rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 4px 20px var(--lavender);
}

.hero-date-sep {
  color: var(--purple) !important;
  font-size: 1.4rem;
  line-height: 1;
}

.hero-date span { color: var(--text-mid); }

/* Orbits */
.hero-orbit {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.orbit {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 50%;
  border: 1px solid rgba(0, 150, 214, 0.12);
  transform: translate(-50%, -50%);
  animation: spin linear infinite;
}

/* make orbits scale with viewport so smaller screens can show all three
   the clamp() calls cap each size between a reasonable minimum and its
   original pixel size. max values bumped to allow a little more room on
   larger phones/tablets but still keep them contained; min sizes also
   raised slightly so the dots remain visible. */
.orbit-1 {
  width: clamp(300px, 40vw, 550px);
  height: clamp(300px, 40vw, 550px);
  animation-duration: 30s;
}
.orbit-2 {
  width: clamp(450px, 60vw, 850px);
  height: clamp(450px, 60vw, 850px);
  animation-duration: 50s;
  animation-direction: reverse;
  border-color: rgba(240, 112, 48, 0.07);
}
.orbit-3 {
  width: clamp(600px, 80vw, 1100px);
  height: clamp(600px, 80vw, 1100px);
  animation-duration: 80s;
  border-color: rgba(123, 45, 139, 0.1);
}

.orbit-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  position: absolute;
  top: -3px; left: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 10px rgba(0, 150, 214, 0.6);
}

.orbit-2 .orbit-dot { background: var(--orange); box-shadow: 0 0 10px rgba(240, 112, 48, 0.5); }
.orbit-3 .orbit-dot { background: var(--purple); box-shadow: 0 0 10px rgba(123, 45, 139, 0.5); }  

@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to   { transform: translate(-50%, -50%) rotate(360deg); }
}

/* extra responsive tweaks for very narrow screens */
@media (max-width: 480px) {
  /* bump up the very-small-screen versions slightly */
  .orbit-1 { width: 200px; height: 200px; }
  .orbit-2 { width: 300px; height: 300px; }
  .orbit-3 { width: 400px; height: 400px; }
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: fadeInUp 1s 1.5s both;
}

.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 0.9rem 2rem;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--cyan);
  color: var(--white);
}

.btn-primary:hover {
  background: #007ab8;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 150, 214, 0.3);
}

#btn-seds {
  background: var(--purple); 
}

#btn-seds:hover {
  background: #6a2575;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(123, 45, 139, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text-mid);
  border: 1.5px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--text-mid);
  color: var(--text);
  background: rgba(30, 31, 69, 0.04);
}

.btn-sm {
  font-size: 0.65rem;
  padding: 0.55rem 1.1rem;
  background: transparent;
  color: var(--cyan);
  border: 1.5px solid rgba(0, 150, 214, 0.4);
}

.btn-sm:hover { background: var(--cyan); color: var(--white); }

.btn-special { color: var(--orange); border-color: rgba(240, 112, 48, 0.4); }
.btn-special:hover { background: var(--orange); color: var(--white); }

.btn-full { width: 100%; }

/* --- SECTION COMMON --- */
.section-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: 3rem;
  color: var(--navy);
}

.section-title em { font-style: normal; color: var(--cyan); }

.section-desc {
  max-width: 620px;
  color: var(--text-mid);
  font-size: 1.05rem;
  margin-bottom: 3rem;
}

/* --- ABOUT --- */
#about {
  padding: 5rem 0;
  background: var(--bg);
  border-top: 3px solid var(--orange);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-mid);
  margin-bottom: 1.2rem;
  font-size: 1.02rem;
  line-height: 1.8;
}

.about-text strong { color: var(--navy); font-weight: 600; }

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.about-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all var(--transition);
}

.about-card:hover {
  background: var(--white);
  transform: translateY(-4px);
  border-color: rgba(240, 112, 48, 0.5);
  box-shadow: 0 6px 24px rgba(214, 125, 0, 0.1);
}

.card-icon { font-size: 1.8rem; margin-bottom: 0.75rem; }

.about-card h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.about-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* --- PARTICIPANTS --- */
#participants {
  padding: 5rem 0 4rem;
  background: var(--bg-soft);
  border-top: 3px solid var(--cyan);
}

#participants .container {
  padding-bottom: 3rem;
}

.participants-carousel {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 2.5rem;
  max-width: var(--container);
  margin: 0 auto;
}

.carousel-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 2.5rem;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  transition: color var(--transition);
  user-select: none;
}

.carousel-btn:hover { color: var(--cyan); }

.participants-track-wrap {
  overflow: hidden;
  flex: 1;
  mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
  padding-top: 8px;
}

.participants-track {
  display: flex;
  gap: 1.5rem;
  width: max-content;
  will-change: transform;
  padding-top: 4px;
}

.participant-card {
  flex-shrink: 0;
  width: 220px;
  height: 130px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.75rem 2rem;
  transition: all var(--transition);
  cursor: default;
}

.participant-card:hover {
  border-color: rgba(123, 45, 139, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(123, 45, 139, 0.1);
}

.participant-logo {
  max-width: 160px;
  max-height: 90px;
  object-fit: contain;
}

.participant-card--join {
  border-style: dashed;
  border-color: rgba(0, 150, 214, 0.3);
  background: rgba(0, 150, 214, 0.02);
}

.participant-card--join:hover {
  border-color: var(--cyan);
  box-shadow: 0 12px 32px rgba(0, 150, 214, 0.1);
}

.participant-join-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.participant-join-icon {
  font-size: 2rem;
  color: var(--cyan);
  line-height: 1;
}

.participant-join-link .participant-name {
  font-size: 0.78rem;
  color: var(--cyan);
  text-align: center;
  line-height: 1.4;
}

@media (max-width: 768px) {
  .participant-card { width: 170px; height: 110px; }
  .participants-carousel { padding: 0 1.5rem; }
}

/* --- CONTACT --- */
#contact {
  padding: 5rem 0;
  background: var(--bg);
  border-top: 3px solid var(--orange);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem 5rem;
  align-items: start;
}

.contact-left {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-info > p {
  color: var(--text-mid);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1rem;
  max-width: 420px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  padding: 1rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: rgba(240, 112, 48, 0.5);
  box-shadow: 0 6px 24px rgba(214, 125, 0, 0.1);
  transform: translateX(5px);
}

.contact-link-icon { font-size: 1.4rem; }

.contact-link-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  font-family: var(--font-display);
}

.contact-link-value { font-size: 0.95rem; color: var(--navy); font-weight: 500; }

/* FORM */
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.5);
  padding: 2.5rem;
  box-shadow: 0 4px 32px rgba(30, 31, 69, 0.06);
}

.form-group { margin-bottom: 1.4rem; }

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-mid);
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  color: var(--navy);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
  background: var(--white);
}

.form-group textarea { resize: vertical; min-height: 110px; }

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

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-form-wrap { order: 2; }
  .contact-left      { order: 1; }

  .contact-link { width: 100%; }
  .contact-form { padding: 1.5rem; }
}

/* FORM */
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.5);
  padding: 2.5rem;
  box-shadow: 0 4px 32px rgba(30, 31, 69, 0.06);
}

.form-group { margin-bottom: 1.4rem; }

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-mid);
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  color: var(--navy);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  outline: none;
  resize: none;
}

.form-group select option { background: var(--white); color: var(--navy); }

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(0, 150, 214, 0.1);
}

.form-success {
  text-align: center;
  padding: 1rem;
  color: var(--cyan);
  font-size: 0.9rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  animation: fadeInUp 0.5s both;
}

/* --- FOOTER --- */
#footer {
  padding: 4rem 0 2.5rem;
  background: var(--navy);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 0.25rem;
}

.footer-tagline { font-size: 0.75rem; color: rgba(200, 184, 216, 0.65); letter-spacing: 0.05em; }

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
}

.footer-social {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition);
}

.footer-social:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

.footer-social-icon { font-size: 1rem; }

.footer-social-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.02em;
}

.footer-social--cta {
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border-color: rgba(0,168,232,0.3);
}

.footer-social--cta:hover {
  background: rgba(0,168,232,0.1);
  border-color: var(--cyan);
}

.footer-links a:hover { color: #ffffff; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.75rem;
  color: rgba(200, 184, 216, 0.45);
}

.footer-ig {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color var(--transition);
}

.footer-ig:hover {
  color: rgba(255,255,255,0.9);
}

/* --- REVEAL --- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible { opacity: 1; transform: translateY(0); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .edition-card { grid-template-columns: 160px 1fr; grid-template-rows: auto auto; }
  .edition-register { grid-column: 1 / -1; justify-content: flex-start; }
}

@media (max-width: 1330px) {
  :root { --nav-h: 60px; }
  #navbar { padding: 0 1.5rem; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(30, 31, 69, 0.1);
  }

  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .edition-card { grid-template-columns: 1fr; padding: 1.5rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .uni-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 764px) {
  .footer-top { flex-direction: column; }
}

@media (max-width: 480px) {
  .about-cards { grid-template-columns: 1fr; }
  .uni-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .contact-form { padding: 1.5rem; }
}


/* --- INTRO SCREEN --- */
#intro-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: opacity 0.9s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.9s cubic-bezier(0.4, 0, 0.2, 1);
}

#intro-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#intro-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#intro-progress {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(255,255,255,0.1);
  z-index: 3;
}

#intro-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, #00a8e8, #f07030);
}

@media (max-width: 768px) {
  #intro-screen {
    background: #fff;
  }
  #intro-video {
    object-fit: contain;
  }
}

/* --- WHY ASTRUM --- */
#why {
  padding: 5rem 0;
  background: var(--bg);
  border-top: 3px solid var(--orange);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.why-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  transition: all var(--transition);
}

.why-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 28px rgba(240, 112, 48, 0.12);
  border-color: rgba(240, 112, 48, 0.3);
}

.why-icon { font-size: 2rem; margin-bottom: 1rem; }

.why-card h3 {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--navy);
  margin-bottom: 0.6rem;
}

.why-card p { font-size: 0.88rem; color: var(--text-mid); line-height: 1.7; }

/* --- AGENDA --- */
#agenda {
  padding: 5rem 0;
  background: var(--bg-soft);
  border-top: 3px solid var(--cyan);
}

.agenda-coming {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  background: var(--white);
  border: 1px dashed rgba(0, 168, 232, 0.3);
  border-radius: calc(var(--radius) * 1.5);
  padding: 4rem 3rem;
}

.agenda-icon { font-size: 3rem; margin-bottom: 1.25rem; }

.agenda-coming h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.agenda-coming p { color: var(--text-mid); font-size: 0.95rem; line-height: 1.7; margin-bottom: 2rem; }

.agenda-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 3rem;
  margin-bottom: 3rem;
}

.agenda-header-right {
  display: flex;
  flex-direction: row;
  gap: 2.5rem;
  align-items: center;
  padding-bottom: 0.6rem;
}

.agenda-header-left .section-title {
  margin-bottom: 0;
}

.agenda-detail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.agenda-detail-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.agenda-detail-text {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.04em;
}

.agenda-body {
  display: grid;
  grid-template-columns: 4fr 3fr;
  gap: 2rem;
  align-items: start;
}

.agenda-schedule {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.agenda-schedule-img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(30, 31, 69, 0.08);
}

.agenda-map {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(30, 31, 69, 0.08);
  height: 100%;
  min-height: 360px;
}

.agenda-map iframe {
  width: 100%;
  height: 100%;
  display: block;
  min-height: 360px;
}

@media (max-width: 768px) {
  .agenda-body { grid-template-columns: 1fr; }
  .agenda-map { min-height: 260px; }
  .agenda-map iframe { min-height: 260px; }
}

@media (max-width: 768px) {
  .agenda-header {
    flex-direction: column;
    gap: 1.5rem;
  }
}



/* --- SPONSORS --- */
#sponsors {
  padding: 5rem 0;
  background: var(--bg);
  border-top: 3px solid var(--orange);
}

.sponsors-category {
  margin-bottom: 1.25rem;
}

.sponsors-category-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--orange);
  text-transform: uppercase;
}

.sponsors-logos-grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.sponsors-logos-grid--lg {
  grid-template-columns: repeat(3, 1fr);
}

.sponsors-logos-grid--sm {
  grid-template-columns: repeat(4, 1fr);
}

.sponsors-logo-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.sponsors-logos-grid--sm .sponsors-logo-card {
  aspect-ratio: unset;
  height: 140px;
  padding: 1.75rem 2rem;
}

.sponsors-logos-grid--lg .sponsors-logo-card {
  aspect-ratio: unset;
  height: 160px;
}

.sponsors-logo-card:hover {
  border-color: rgba(123, 45, 139, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(123, 45, 139, 0.1);
}

.sponsors-logo-card--empty {
  border-style: dashed;
  border-color: rgba(240, 112, 48, 0.25);
  background: rgba(240, 112, 48, 0.02);
  flex-direction: column;
  gap: 0.75rem;
}

.sponsors-logo-card--empty:hover {
  border-color: var(--orange);
  box-shadow: 0 8px 24px rgba(240, 112, 48, 0.1);
}

.sponsor-empty-text {
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
  text-align: center;
}

.sponsors-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 2rem 2.5rem;
  flex-wrap: wrap;
}

.sponsors-cta p {
  color: var(--text-mid);
  font-size: 0.95rem;
  max-width: 520px;
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .sponsors-logos-grid--lg { grid-template-columns: repeat(2, 1fr); }
  .sponsors-logos-grid--sm { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 600px) {
  .sponsors-logos-grid--lg,
  .sponsors-logos-grid--sm { grid-template-columns: repeat(2, 1fr); }
  .sponsors-cta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 768px) {
  .sponsors-logos-grid--lg,
  .sponsors-logos-grid--sm {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 480px) {
  .sponsors-logos-grid--lg,
  .sponsors-logos-grid--sm {
    grid-template-columns: 1fr 1fr;
  }
}

/* --- ORGANIZER --- */
#organizer {
  padding: 5rem 0;
  background: var(--bg-soft);
  border-top: 3px solid var(--cyan);
}

.organizer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 5rem;
  align-items: start;
}

.organizer-text p { color: var(--text-mid); font-size: 1rem; line-height: 1.8; margin-bottom: 1.2rem; }
.organizer-text strong { color: var(--navy); font-weight: 600; }
.organizer-text p:first-of-type { border-left: 3px solid var(--cyan); padding-left: 1rem; color: var(--text); }
.organizer-text .btn { margin-top: 0.5rem; }

.organizer-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.org-stat {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
}

.org-stat:nth-child(odd)  { border-top: 3px solid var(--orange); }
.org-stat:nth-child(even) { border-top: 3px solid var(--cyan); }

.org-stat-number {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--navy);
  letter-spacing: 0.05em;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.org-stat-label { font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.05em; }

.org-logo-placeholder {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-bottom: 3px solid rgb(123, 45, 139);
}

.org-logo-placeholder img {
  max-width: 180px;
  width: 100%;
  object-fit: contain;
}

/* --- RESPONSIVE NUEVAS SECCIONES --- */
@media (max-width: 1024px) {
  .why-grid,
  .formato-grid { grid-template-columns: repeat(2, 1fr); }
  .organizer-grid { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  .why-grid,
  .formato-grid,
  .sponsors-grid { grid-template-columns: 1fr; }
  .target-grid { grid-template-columns: 1fr; }
  .sponsors-cta { flex-direction: column; align-items: flex-start; }
  .organizer-stats { grid-template-columns: repeat(2, 1fr); }
  .agenda-coming { padding: 2.5rem 1.5rem; }
}

@media (max-width: 768px) {

  /* 1 — Hero date */
  .hero-date {
    font-size: 0.7rem;
    padding: 0.45rem 0.85rem;
    gap: 0.4rem;
  }

  .hero-actions .btn {
    font-size: 0.7rem;
    padding: 0.7rem 1.1rem;
  }

  .hero-title {
    font-size: clamp(3rem, 15vw, 5rem);
  }

  /* 2 — Agenda header */
  .agenda-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .agenda-header-right {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding-bottom: 0;
  }

  .agenda-header-left .section-title {
    text-align: left;
  }
}

@media (max-width: 768px) {
  /* 2 — Agenda: achicar texto de fecha/ubicación */
  .agenda-detail-text {
    font-size: 0.75rem;
  }
}



/* AGREGADO PARA EL BOTON DE INSCRIPCION */
.btn-destacado {
  background: linear-gradient(135deg, var(--navy) 0%, var(--cyan) 50%, var(--purple) 100%);
  color: #ffffff; 
  border: none; 
  box-shadow: 0 4px 15px rgba(0, 122, 184, 0.3); 
  background-size: 200% auto; 
  transition: all 0.4s ease;
}

.btn-destacado:hover {
  background-position: right center;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 122, 184, 0.5); 
  color: #ffffff;
}


.talleres-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  padding: 2rem 2.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}