/* ===================================================
   TEDx Córdoba 2025 — Styles
   Mobile-first, dark theme
   =================================================== */

/* ---- CSS Variables ---- */
:root {
  --red: #e62b1e;
  --accent: #ff6b35;
  --bg: #0f0f0f;
  --bg2: #161616;
  --bg3: #1e1e1e;
  --white: #ffffff;
  --gray: #9a9a9a;
  --gray-light: #2a2a2a;
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --transition: 0.3s ease;
  --radius: 4px;
  --container: 1200px;
}

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

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

body {
  background-color: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-body);
}

/* ---- Utility ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.text-red { color: var(--red); }

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.08em;
  padding: 12px 28px;
  border-radius: var(--radius);
  transition: var(--transition);
  text-align: center;
}

.btn-red {
  background: var(--red);
  color: var(--white);
  border: 2px solid var(--red);
}

.btn-red:hover {
  background: #c0241a;
  border-color: #c0241a;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230, 43, 30, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--bg);
  transform: translateY(-2px);
}

.btn-large {
  font-size: 1.1rem;
  padding: 16px 40px;
}

.btn-full {
  width: 100%;
  display: block;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--gray);
  font-size: 1rem;
  max-width: 560px;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* ---- Reveal Animation ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===================================================
   NAVBAR
   =================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 15, 15, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 15, 15, 0.98);
  box-shadow: 0 4px 24px rgba(0,0,0,0.6);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 20px;
  max-width: var(--container);
  margin: 0 auto;
  gap: 16px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.logo-ted { color: var(--red); }
.logo-city { color: var(--white); margin-left: 2px; }

.nav-links {
  display: none;
  gap: 28px;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color var(--transition);
}

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

.nav-cta {
  display: none;
  font-size: 0.8rem;
  padding: 9px 20px;
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav open */
.nav-links.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--gray-light);
  padding: 24px 20px 32px;
  gap: 0;
}

.nav-links.open li a {
  display: block;
  padding: 14px 0;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--gray-light);
}

/* ===================================================
   HERO
   =================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero.loaded .hero-bg {
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 100px 20px 60px;
  max-width: 900px;
  width: 100%;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 9rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: var(--white);
  text-shadow: 0 4px 32px rgba(0,0,0,0.5);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.05em;
  margin-bottom: 48px;
}

/* ---- Countdown ---- */
.countdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 400px;
  margin: 0 auto 40px;
}

.countdown-box {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 18px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  backdrop-filter: blur(6px);
}

.countdown-num {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  line-height: 1;
  color: var(--white);
}

.countdown-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}

.event-ended-msg {
  background: rgba(230, 43, 30, 0.15);
  border: 1px solid var(--red);
  border-radius: var(--radius);
  padding: 16px 24px;
  margin-bottom: 32px;
  font-size: 1.1rem;
  color: var(--white);
}

/* ===================================================
   SOBRE EL EVENTO
   =================================================== */
.sobre {
  padding: 100px 0;
  background: var(--bg2);
}

.sobre-grid {
  display: grid;
  gap: 48px;
}

.sobre-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}

.sobre-image img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.sobre-image-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
  padding: 32px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sobre-image-label span {
  font-size: 0.75rem;
  color: var(--gray);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.sobre-image-label strong {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--red);
}

.sobre-text {
  color: var(--gray);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.sobre-text strong {
  color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 36px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px;
  background: var(--bg3);
  border-left: 3px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--red);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===================================================
   SPEAKERS
   =================================================== */
.speakers {
  padding: 100px 0;
  background: var(--bg);
}

.speakers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.speaker-card {
  background: var(--bg2);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
}

.speaker-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.5);
  border-color: var(--red);
}

.speaker-img {
  width: 100%;
  aspect-ratio: 1/1;
  overflow: hidden;
}

.speaker-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.speaker-card:hover .speaker-img img {
  transform: scale(1.07);
}

.speaker-img-gradient {
  display: flex;
  align-items: center;
  justify-content: center;
}

.g1 { background: linear-gradient(135deg, #1a0a0a, #4a1010); }
.g2 { background: linear-gradient(135deg, #0a1a1a, #104040); }
.g3 { background: linear-gradient(135deg, #1a1a0a, #40400a); }
.g4 { background: linear-gradient(135deg, #0a0a1a, #10104a); }

.speaker-initial {
  font-family: var(--font-display);
  font-size: 3rem;
  color: rgba(255,255,255,0.3);
}

.speaker-info {
  padding: 16px;
}

.speaker-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.speaker-role {
  font-size: 0.78rem;
  color: var(--gray);
  margin-bottom: 8px;
}

.speaker-topic {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  gap: 6px;
}

.speaker-topic i {
  font-size: 0.5rem;
}

/* ===================================================
   AGENDA / TIMELINE
   =================================================== */
.agenda {
  padding: 100px 0;
  background: var(--bg2);
}

.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 72px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--red), rgba(230,43,30,0.1));
}

.timeline-item {
  display: grid;
  grid-template-columns: 72px 0 1fr;
  gap: 0 24px;
  margin-bottom: 36px;
  position: relative;
}

.timeline-time {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--red);
  letter-spacing: 0.05em;
  padding-top: 4px;
  text-align: right;
  padding-right: 28px;
}

.timeline-dot {
  position: absolute;
  left: 68px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--red);
  border: 2px solid var(--bg2);
  box-shadow: 0 0 0 3px rgba(230,43,30,0.3);
  z-index: 1;
}

.timeline-content {
  background: var(--bg3);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--gray-light);
  transition: border-color var(--transition);
  grid-column: 3;
}

.timeline-content:hover {
  border-color: var(--red);
}

.timeline-icon {
  font-size: 1.2rem;
  color: var(--red);
  margin-bottom: 8px;
}

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 0.88rem;
  color: var(--gray);
  line-height: 1.5;
}

/* ===================================================
   TICKETS
   =================================================== */
.tickets {
  padding: 100px 0;
  background: var(--bg);
}

.tickets-grid {
  display: grid;
  gap: 24px;
}

.ticket-card {
  background: var(--bg2);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  padding: 36px 28px;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.ticket-card:hover {
  border-color: var(--red);
  transform: translateY(-4px);
  box-shadow: 0 20px 48px rgba(230,43,30,0.2);
}

.ticket-featured {
  border-color: var(--red);
  background: var(--bg3);
}

.ticket-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--red);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  padding: 4px 16px;
  border-radius: 20px;
  white-space: nowrap;
  animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(230,43,30,0.6); }
  50% { box-shadow: 0 0 0 8px rgba(230,43,30,0); }
}

.ticket-header {
  margin-bottom: 20px;
}

.ticket-type {
  font-family: var(--font-display);
  font-size: 1.8rem;
  letter-spacing: 0.08em;
  color: var(--white);
}

.ticket-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 28px;
}

.price-currency {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray);
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2.8rem;
  color: var(--white);
  line-height: 1;
}

.ticket-benefits {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ticket-benefits li {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.85);
  display: flex;
  align-items: center;
  gap: 10px;
}

.ticket-benefits li i {
  color: var(--red);
  flex-shrink: 0;
  width: 14px;
}

.ticket-benefits li.unavailable {
  color: var(--gray);
}

.ticket-benefits li.unavailable i {
  color: var(--gray);
}

/* ===================================================
   SEDE
   =================================================== */
.sede {
  padding: 100px 0;
  background: var(--bg2);
}

.sede-grid {
  display: grid;
  gap: 48px;
}

.sede-image {
  border-radius: var(--radius);
  overflow: hidden;
}

.sede-image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.sede-text {
  color: var(--gray);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.sede-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sede-info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.sede-info-item > i {
  font-size: 1.2rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.sede-info-item div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.sede-info-item strong {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sede-info-item span {
  font-size: 0.88rem;
  color: var(--gray);
  line-height: 1.5;
}

/* ===================================================
   PATROCINADORES
   =================================================== */
.sponsors {
  padding: 80px 0;
  background: var(--bg);
}

.sponsors-levels {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.sponsor-level-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  color: var(--gray);
  text-align: center;
  margin-bottom: 20px;
}

.diamond { color: #b9f2ff; }
.gold { color: #ffd700; }
.silver { color: #c0c0c0; }

.sponsor-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.sponsor-logo-item {
  border-radius: var(--radius);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  text-align: center;
  transition: var(--transition);
}

.sponsor-diamond {
  background: var(--bg3);
  border: 2px solid #b9f2ff;
  color: #b9f2ff;
  font-size: 1.5rem;
  padding: 20px 40px;
}

.sponsor-gold {
  background: var(--bg3);
  border: 2px solid #ffd700;
  color: #ffd700;
  font-size: 1.2rem;
  padding: 16px 28px;
}

.sponsor-silver {
  background: var(--bg3);
  border: 1px solid rgba(192,192,192,0.4);
  color: #c0c0c0;
  font-size: 1rem;
  padding: 12px 20px;
}

.sponsor-logo-item:hover {
  transform: translateY(-2px);
  opacity: 0.85;
}

/* ===================================================
   GALLERY
   =================================================== */
.gallery {
  padding: 100px 0;
  background: var(--bg2);
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-item:hover img {
  transform: scale(1.06);
}

.gallery-overlay i {
  font-size: 2rem;
  color: var(--white);
}

.gallery-overlay span {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--white);
  text-transform: uppercase;
}

/* ===================================================
   FAQ
   =================================================== */
.faq {
  padding: 100px 0;
  background: var(--bg);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--gray-light);
}

.faq-item:first-child {
  border-top: 1px solid var(--gray-light);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--white);
  text-align: left;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--red);
}

.faq-question i {
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--red);
  transition: transform var(--transition);
}

.faq-question[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-answer.open {
  max-height: 400px;
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--gray);
  line-height: 1.7;
}

/* ===================================================
   NEWSLETTER
   =================================================== */
.newsletter {
  padding: 80px 0;
  background: var(--bg2);
}

.newsletter-inner {
  display: grid;
  gap: 40px;
  background: var(--bg3);
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  padding: 48px 32px;
}

.newsletter-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin-bottom: 12px;
}

.newsletter-inner > .newsletter-text p {
  color: var(--gray);
  font-size: 0.95rem;
}

.newsletter-inputs {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 12px;
}

.newsletter-inputs input {
  background: var(--bg2);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 16px;
  transition: border-color var(--transition);
  width: 100%;
}

.newsletter-inputs input:focus {
  outline: none;
  border-color: var(--red);
}

.newsletter-inputs input::placeholder { color: var(--gray); }

.newsletter-disclaimer {
  font-size: 0.78rem;
  color: var(--gray);
}

.newsletter-success {
  margin-top: 12px;
  color: #4caf50;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ===================================================
   FOOTER
   =================================================== */
.footer {
  background: #080808;
  padding: 64px 0 0;
  border-top: 1px solid var(--gray-light);
}

.footer-top {
  display: grid;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.6;
  max-width: 340px;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 14px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--gray-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--gray);
  transition: var(--transition);
}

.footer-social a:hover {
  border-color: var(--red);
  color: var(--red);
  transform: translateY(-2px);
}

.footer-links-group h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-links-group ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-group ul a {
  font-size: 0.85rem;
  color: var(--gray);
  transition: color var(--transition);
}

.footer-links-group ul a:hover { color: var(--white); }

.footer-bottom {
  border-top: 1px solid var(--gray-light);
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: var(--gray);
  line-height: 1.5;
}

.footer-bottom a {
  color: var(--red);
}

.footer-hashtag {
  color: rgba(255,255,255,0.3) !important;
  letter-spacing: 0.06em;
}

/* ===================================================
   MODAL
   =================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  backdrop-filter: blur(4px);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg2);
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px 28px;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg3);
  color: var(--gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--red);
  color: var(--white);
}

.modal-header {
  margin-bottom: 28px;
}

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.modal-header p {
  font-size: 0.88rem;
  color: var(--gray);
}

.modal-form .form-row {
  display: grid;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
}

.form-group input,
.form-group select {
  background: var(--bg3);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 14px;
  transition: border-color var(--transition);
  width: 100%;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--red);
}

.form-group input::placeholder { color: var(--gray); }

.form-group select option {
  background: var(--bg3);
  color: var(--white);
}

.modal-total {
  background: var(--bg3);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid var(--gray-light);
}

.total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 0.88rem;
}

.total-row span { color: var(--gray); }
.total-row strong { color: var(--white); }

.total-final {
  border-top: 1px solid var(--gray-light);
  margin-top: 8px;
  padding-top: 14px;
}

.total-final span {
  font-weight: 600;
  color: var(--white) !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.9rem;
}

.total-final strong {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--red) !important;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.4;
}

.form-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--red);
  cursor: pointer;
}

.modal-success {
  text-align: center;
  padding: 20px 0;
}

.success-icon {
  font-size: 4rem;
  color: #4caf50;
  margin-bottom: 16px;
}

.modal-success h3 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 12px;
}

.modal-success p {
  color: var(--gray);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

/* ===================================================
   LIGHTBOX
   =================================================== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  color: var(--white);
  font-size: 1.5rem;
  background: rgba(255,255,255,0.1);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 1;
}

.lightbox-close:hover { background: var(--red); }

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--white);
  font-size: 1.2rem;
  background: rgba(255,255,255,0.1);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 1;
}

.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

.lightbox-prev:hover,
.lightbox-next:hover { background: var(--red); }

.lightbox-content {
  text-align: center;
  max-width: 900px;
  width: 100%;
}

.lightbox-content img {
  max-height: 70vh;
  width: auto;
  max-width: 100%;
  border-radius: var(--radius);
  margin: 0 auto;
}

.lightbox-caption {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--gray);
  letter-spacing: 0.06em;
}

/* ===================================================
   BREAKPOINT: 480px
   =================================================== */
@media (min-width: 480px) {
  .countdown {
    max-width: 440px;
  }

  .countdown-box {
    padding: 22px 16px;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===================================================
   BREAKPOINT: 768px
   =================================================== */
@media (min-width: 768px) {
  /* Nav */
  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: inline-block;
  }

  .hamburger {
    display: none;
  }

  /* Hero — countdown 4x1 */
  .countdown {
    grid-template-columns: repeat(4, 1fr);
    max-width: 560px;
  }

  /* Sobre */
  .sobre-image img { height: 400px; }

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

  /* Speakers */
  .speakers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Tickets — row */
  .tickets-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Sede */
  .sede-image img { height: 360px; }

  /* Gallery */
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Newsletter */
  .newsletter-inputs {
    flex-direction: row;
  }

  .newsletter-inputs input {
    flex: 1;
  }

  .newsletter-inputs .btn {
    flex-shrink: 0;
  }

  /* Footer */
  .footer-top {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  /* Modal form rows */
  .modal-form .form-row {
    grid-template-columns: 1fr 1fr;
  }

  /* Footer bottom */
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ===================================================
   BREAKPOINT: 1024px
   =================================================== */
@media (min-width: 1024px) {
  /* Sobre */
  .sobre-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .sobre-image img { height: 480px; }

  /* Speakers */
  .speakers-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Timeline desktop */
  .timeline::before {
    left: 100px;
  }

  .timeline-item {
    grid-template-columns: 100px 0 1fr;
  }

  .timeline-dot {
    left: 96px;
  }

  .timeline-time {
    font-size: 1.1rem;
  }

  /* Sede */
  .sede-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .sede-image img { height: 440px; }

  /* Newsletter */
  .newsletter-inner {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
  }
}

/* ===================================================
   SCROLLBAR
   =================================================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--red); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #c0241a; }

/* ===================================================
   SELECTION
   =================================================== */
::selection {
  background: var(--red);
  color: var(--white);
}