:root {
  --bg-body: #f5f5f7;
  --bg-alt: #ffffff;
  --bg-accent: #111827;
  --text-main: #111827;
  --text-muted: #4b5563;
  --text-soft: #6b7280;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --border-soft: #e5e7eb;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.08);
  --container-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
  background: var(--bg-body);
  line-height: 1.6;
}

/* Layout base */

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-narrow {
  max-width: 720px;
  margin: 0 auto;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.section-intro {
  max-width: 760px;
  color: var(--text-muted);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 245, 247, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(209, 213, 219, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
}

.logo-block {
  display: flex;
  flex-direction: column;
  font-weight: 700;
}

.logo-tag {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.logo-main {
  font-size: 1.1rem;
}

.main-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.92rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--text-soft);
  padding-bottom: 0.1rem;
  border-bottom: 1px solid transparent;
}

.main-nav a:hover {
  color: var(--accent);
  border-color: rgba(37, 99, 235, 0.35);
}

/* Hero */

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-kicker {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 1.02rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.meta-item {
  background: var(--bg-alt);
  border-radius: 14px;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border-soft);
}

.meta-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-soft);
  margin-bottom: 0.2rem;
}

.meta-value {
  font-size: 0.96rem;
  font-weight: 600;
}

.hero-note {
  font-size: 0.95rem;
  color: var(--text-soft);
}

.hero-media {
  display: flex;
  justify-content: flex-end;
}

.hero-figure {
  background: var(--bg-alt);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.hero-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-figure figcaption {
  font-size: 0.8rem;
  padding: 0.6rem 0.9rem 0.8rem;
  color: var(--text-soft);
}

/* Section grid */

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 2.2rem;
}

.section-grid h3 {
  margin-top: 0;
}

/* Lists */

.list-check {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.list-check li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.55rem;
  color: var(--text-muted);
}

.list-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-size: 0.85rem;
  color: var(--accent);
}

/* Timeline */

.timeline {
  list-style: none;
  padding-left: 0;
  margin: 1.5rem 0 2rem;
  border-left: 2px solid rgba(209, 213, 219, 0.8);
}

.timeline li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 1.4rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  left: -6px;
  top: 0.35rem;
}

.timeline-time {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-soft);
  margin-bottom: 0.2rem;
}

.timeline-content h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}

.timeline-content p {
  margin: 0;
  color: var(--text-muted);
}

.agenda-note {
  color: var(--text-soft);
  font-size: 0.96rem;
}

/* Speakers */

.speaker {
  background: #f9fafb;
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.5rem;
  margin-top: 1.5rem;
  border: 1px solid rgba(209, 213, 219, 0.9);
}

.speaker.host {
  border-style: dashed;
}

.speaker-header h3 {
  margin: 0 0 0.4rem;
  font-size: 1.2rem;
}

.speaker-role {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.speaker-body p {
  margin: 0.65rem 0;
  color: var(--text-muted);
}

/* Blockquote email */

.mail-block {
  margin: 1.5rem 0;
  padding: 1.2rem 1.4rem;
  border-radius: 14px;
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  font-size: 0.95rem;
  color: var(--text-main);
}

.mail-block p {
  margin: 0.3rem 0;
}

/* FAQ */

.faq-list {
  margin: 1.5rem 0 0;
}

.faq-item {
  border-top: 1px solid var(--border-soft);
  padding: 1rem 0;
}

.faq-item:last-child {
  border-bottom: 1px solid var(--border-soft);
}

.faq-item dt {
  font-weight: 600;
}

.faq-item dd {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
}

/* Footer */

.site-footer {
  padding: 2.5rem 0 2rem;
  background: var(--bg-accent);
  color: #e5e7eb;
  margin-top: 1.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
}

.footer-brand {
  font-weight: 600;
  margin: 0 0 0.25rem;
}

/* Utilities */

p {
  margin: 0 0 0.9rem;
}

strong {
  font-weight: 600;
}

/* Responsivo */

@media (max-width: 900px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .main-nav {
    flex-wrap: wrap;
    gap: 0.6rem 1.1rem;
  }

  .hero-grid,
  .section-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 3.5rem;
  }
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 2rem;
  }

  .section {
    padding: 3.2rem 0;
  }

  .speaker {
    padding: 1.3rem 1.1rem;
  }

  .mail-block {
    padding: 1rem 1.1rem;
  }
}