:root {
  --bg-dark: #202124;
  --bg-light: #f7f7f8;
  --bg-card: #ffffff;
  --text-dark: #12203f;
  --text-light: #f5f5f7;
  --text-muted: #5b5f6b;

  /* Official Google Gemini sparkle palette (from Google_Gemini_icon_2025.svg) — blue is the dominant field, red/yellow/green are accents concentrated near their tips */
  --gem-red: #FC413D;
  --gem-yellow: #FBBC04;
  --gem-green: #00B95C;
  --gem-blue: #3186FF;
  --gem-gradient: linear-gradient(135deg, var(--gem-red) 0%, var(--gem-yellow) 20%, var(--gem-green) 40%, var(--gem-blue) 65%, var(--gem-blue) 100%);

  --blue-border: #b9cffb;
  --accent-1: var(--gem-red);
  --accent-2: var(--gem-yellow);
  --accent-3: var(--gem-blue);
  --accent-4: var(--gem-green);
  --card-dark: #303134;
  --radius-lg: 28px;
  --radius-md: 18px;
  --max-width: 1180px;
  --font-heading: "Poppins", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.overflow-hidden { overflow: hidden; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 { font-family: var(--font-heading); font-weight: 700; margin: 0; }

p { line-height: 1.55; margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

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

.sparkle { display: block; }
.sparkle--lg { width: 40px; height: 40px; margin-bottom: 10px; }
.sparkle--md { width: 28px; height: 28px; margin: 0 auto 14px; }

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn--dark {
  background: var(--bg-dark);
  color: var(--text-light);
}
.btn--dark:hover { box-shadow: 0 8px 20px rgba(0,0,0,0.25); }

.btn--gradient {
  background: var(--gem-blue);
  color: #fff;
  width: 100%;
  text-align: center;
}
.btn--gradient:hover { box-shadow: 0 8px 24px rgba(49,134,255,0.35); }

.btn--accent {
  background: var(--accent-color, var(--gem-blue));
  color: #fff;
  width: 100%;
  text-align: center;
}
.btn--accent:hover { box-shadow: 0 8px 24px color-mix(in srgb, var(--accent-color, var(--gem-blue)) 45%, transparent); }

.pill {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}
.pill--gratis {
  background: var(--gem-blue);
  color: #fff;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--bg-light);
  color: var(--text-dark);
  padding: 28px 6vw 0;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  max-width: 720px;
  max-height: 720px;
  background: var(--gem-gradient);
  filter: blur(120px);
  opacity: 0.18;
  border-radius: 50%;
  pointer-events: none;
}
.hero > * { position: relative; z-index: 1; }

.hero__bar--top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand__logo { height: 42px; width: auto; }

.brand__partner {
  font-size: 0.95rem;
  line-height: 1.3;
  text-align: right;
  color: var(--text-dark);
  opacity: 0.7;
}

.hero__content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 32px;
  padding: 56px 0 40px;
}

.hero__text h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  line-height: 1.02;
  margin-bottom: 18px;
  color: var(--text-dark);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 500;
  margin-bottom: 26px;
  color: var(--text-muted);
}

.hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn--outline-light {
  background: transparent;
  border: 2px solid rgba(18,32,63,0.25);
  color: var(--text-dark);
}
.btn--outline-light:hover { border-color: var(--text-dark); }

.btn--solid-light {
  background: var(--gem-blue);
  border: 2px solid var(--gem-blue);
  color: #fff;
}
.btn--solid-light:hover { box-shadow: 0 8px 20px rgba(49,134,255,0.35); }

.hero__image img {
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  object-fit: cover;
  box-shadow: 0 30px 60px rgba(0,0,0,0.45);
}

.hero__bar--bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 22px;
}

.dash { display: inline-block; height: 6px; border-radius: 4px; }
.dash--pink { width: 70px; background: var(--gem-red); }
.dash--yellow { width: 40px; background: var(--gem-yellow); }
.dot { width: 18px; height: 18px; border-radius: 50%; }
.dot--blue { background: var(--gem-blue); margin-left: auto; }

/* ---------- Subnav ---------- */
.subnav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(12,12,16,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.subnav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  gap: 8px;
  padding: 10px 6vw;
  overflow-x: auto;
}
.subnav__link {
  flex: none;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-light);
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.15);
  white-space: nowrap;
}
.subnav__link:hover { border-color: rgba(255,255,255,0.4); }
.subnav__link.accent-1 { color: var(--gem-red); border-color: var(--gem-red); }
.subnav__link.accent-4 { color: var(--gem-blue); border-color: var(--gem-blue); }

/* ---------- Intro ---------- */
.intro {
  padding: 72px 6vw 56px;
}
.intro__text {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 0 20px;
}
.intro__text h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  line-height: 1.2;
  margin-bottom: 16px;
}
.intro__text p {
  color: var(--text-muted);
  font-size: 1.05rem;
}
.intro__text strong { color: var(--text-dark); }

.chooser {
  max-width: var(--max-width);
  margin: 40px auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.chooser__card {
  display: block;
  background: var(--bg-card);
  border: 2.5px solid var(--accent-color, var(--gem-blue));
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 12px 30px rgba(18,32,63,0.08);
  transition: transform 0.15s ease;
}
.chooser__card:hover { transform: translateY(-3px); }
.chooser__kicker {
  display: inline-block;
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--accent-color, var(--gem-blue));
  margin-bottom: 10px;
}
.chooser__card h3 { font-size: 1.5rem; margin-bottom: 10px; }
.chooser__card p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 18px; }
.chooser__cta { font-weight: 700; color: var(--accent-color); }
.chooser__card.accent-1 { --accent-color: var(--gem-red); }
.chooser__card.accent-4 { --accent-color: var(--gem-blue); }

/* ---------- Tracks ---------- */
.track {
  padding: 72px 6vw;
  max-width: var(--max-width);
  margin: 0 auto;
}
.track--alt { background: var(--bg-light); }

.track__header { text-align: center; max-width: 820px; margin: 0 auto 48px; }

.track__logo { height: 22px; margin: 0 auto 18px; }

.eyebrow {
  display: inline-block;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--accent-color, var(--gem-red));
  background: color-mix(in srgb, var(--accent-color, var(--gem-red)) 15%, transparent);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.eyebrow.accent-1 { --accent-color: var(--gem-red); }
.eyebrow.accent-4 { --accent-color: var(--gem-blue); }

.track__header h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin-bottom: 12px;
}

.track__tagline {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.track__time {
  font-weight: 600;
  color: var(--text-dark);
  margin-top: 32px;
}

/* ---------- Mini schedule grid ---------- */
.mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  text-align: left;
}

.mini-card {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid rgba(18,32,63,0.08);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: 0 8px 18px rgba(18,32,63,0.06);
  transition: transform 0.15s ease;
}
.mini-card:hover { transform: translateY(-2px); }

.mini-date {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-align: center;
  color: var(--text-muted);
  line-height: 1.3;
}

.mini-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--accent-color);
}

.mini-title {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.3;
  text-align: left;
}

/* ---------- Session detail cards ---------- */
.sessions {
  display: grid;
  gap: 28px;
}

.session {
  background: var(--card-dark);
  color: var(--text-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.06);
  border-top: 4px solid var(--accent-color);
}

.session__body {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.session__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.session__number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--accent-color);
}

.session .date-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-light);
  background: rgba(255,255,255,0.08);
  padding: 6px 12px;
  border-radius: 999px;
}

.session__body h3 {
  font-size: 1.3rem;
  line-height: 1.25;
}

.session__blurb {
  font-weight: 600;
  color: var(--accent-color);
}

.session__compare {
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(245,245,247,0.7);
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 10px 14px;
}
.session__compare strong { color: var(--text-light); }

.session__label {
  font-weight: 700;
  margin-top: 6px;
}

.session__body ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: rgba(245,245,247,0.75);
  margin-bottom: 8px;
}
.session__body ul li::before {
  content: "•";
  color: var(--accent-color);
  font-weight: 700;
  margin-right: 8px;
}
.session__body ul li strong { color: var(--text-light); }

.session__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}
.session .btn--accent { width: auto; flex: 1 1 200px; min-width: 200px; }
.session .btn--calendar { flex: 1 1 200px; }

.btn--calendar {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.35);
  color: var(--text-light);
}
.btn--calendar:hover { border-color: var(--text-light); }

.session.accent-1, .mini-card.accent-1, .accordion-item.accent-1 { --accent-color: var(--accent-1); }
.session.accent-2, .mini-card.accent-2, .accordion-item.accent-2 { --accent-color: var(--accent-2); }
.session.accent-3, .mini-card.accent-3, .accordion-item.accent-3 { --accent-color: var(--accent-3); }
.session.accent-4, .mini-card.accent-4, .accordion-item.accent-4 { --accent-color: var(--accent-4); }

/* ---------- Accordion (horizontal session itinerary) ---------- */
.accordion {
  display: flex;
  align-items: stretch;
  gap: 10px;
}

.accordion-item {
  position: relative;
  flex: 1 1 0%;
  min-width: 0;
  background: var(--accent-color);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  color: #fff;
  transition: transform 0.15s ease;
}
.accordion-item:hover { transform: translateY(-3px); }

.accordion-item__number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2rem;
  line-height: 1;
}

.accordion-item__info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.accordion-item__date {
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  opacity: 0.85;
}

.accordion-item__title {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.3;
}

.accordion-item__expand {
  align-self: flex-start;
  background: rgba(255,255,255,0.18);
  border: none;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  font-family: var(--font-body);
  padding: 8px 16px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.accordion-item__expand:hover,
.accordion-item__expand:focus-visible {
  background: rgba(255,255,255,0.32);
}

/* ---------- Session modal ---------- */
.session-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.session-modal[hidden] { display: none; }

.session-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}

.session-modal__panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
}

.session-modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.12);
  color: var(--text-light);
  font-size: 1rem;
  cursor: pointer;
}
.session-modal__close:hover { background: rgba(255,255,255,0.22); }

/* ---------- Confirmation page ---------- */
.hero--compact { padding-bottom: 28px; }

.confirm {
  padding: 64px 6vw 96px;
  display: flex;
  justify-content: center;
}
.confirm__card {
  max-width: 560px;
  width: 100%;
  text-align: center;
  background: var(--bg-card);
  border: 2px solid var(--gem-green);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  box-shadow: 0 12px 30px rgba(18,32,63,0.08);
}
.confirm__card .sparkle { margin: 0 auto 18px; }
.confirm__card h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 16px;
}
.confirm__text {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 8px;
}
.confirm__sessions {
  text-align: left;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin: 24px 0;
}
.confirm__sessions-label { font-weight: 700; margin-bottom: 10px; }
.confirm__sessions ul { display: flex; flex-direction: column; gap: 14px; }
.confirm__sessions li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-left: 18px;
  position: relative;
}
.confirm__sessions li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--gem-green);
  font-weight: 700;
}
.confirm__cal-link {
  flex: none;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gem-blue);
  white-space: nowrap;
}
.confirm__cal-link:hover { text-decoration: underline; }
.confirm__actions {
  justify-content: center;
  margin-top: 12px;
}
.confirm__actions .btn--outline-light { border-color: rgba(18,32,63,0.2); }

@media (max-width: 560px) {
  .confirm__card { padding: 40px 24px; }
}

/* ---------- Registro ---------- */
.registro {
  padding: 80px 6vw;
  background: var(--bg-card);
  border-top: 1px solid rgba(18,32,63,0.08);
  border-bottom: 1px solid rgba(18,32,63,0.08);
}
.registro__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.registro__inner h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin: 8px 0 14px;
}
.registro__text {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

/* ---------- Registro form ---------- */
.registro-form {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field--full { grid-column: 1 / -1; }

.form-field label,
.registro-form legend {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-dark);
  padding: 0;
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field select {
  font-family: var(--font-body);
  font-size: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(18,32,63,0.15);
  background: var(--bg-light);
  color: var(--text-dark);
}
.form-field input:focus,
.form-field select:focus {
  outline: 2px solid var(--gem-blue);
  outline-offset: 1px;
}

.registro-form fieldset {
  border: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checkbox-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  border: 1px solid rgba(18,32,63,0.12);
  border-radius: var(--radius-md);
  padding: 16px;
  background: var(--bg-light);
}

.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-dark);
  cursor: pointer;
}
.checkbox-item input { accent-color: var(--accent-color, var(--gem-red)); margin-top: 3px; }
.checkbox-item.accent-1 { --accent-color: var(--accent-1); }
.checkbox-item.accent-2 { --accent-color: var(--accent-2); }
.checkbox-item.accent-3 { --accent-color: var(--accent-3); }
.checkbox-item.accent-4 { --accent-color: var(--accent-4); }
.checkbox-item.checked { font-weight: 700; }

.form-field--privacy {
  flex-direction: row;
  font-size: 0.85rem;
  color: var(--text-muted);
  align-items: center;
}
.form-field--privacy a { text-decoration: underline; }

.form-error {
  color: var(--accent-1);
  font-size: 0.8rem;
  margin: 0;
}

.registro-form__submit {
  align-self: center;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
}
.registro-form__submit:disabled { opacity: 0.6; cursor: not-allowed; }

.form-status {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
}
.form-status.is-error { color: var(--accent-1); }
.form-status.is-success { color: var(--accent-4); }

.registro-form.is-submitted .form-field,
.registro-form.is-submitted fieldset,
.registro-form.is-submitted .registro-form__submit {
  display: none;
}

/* ---------- About ---------- */
.about {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 80px 6vw;
  text-align: center;
}
.about__logo { height: 30px; margin: 0 auto 24px; filter: brightness(0) invert(1); }
.about h2 { font-size: 2rem; margin-bottom: 18px; }
.about p {
  max-width: 640px;
  margin: 0 auto 40px;
  color: rgba(245,245,247,0.8);
  font-size: 1.05rem;
}
.about__badges {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}
.about__badges img {
  height: 110px;
  width: auto;
  background: #fff;
  border-radius: 16px;
  padding: 10px 16px;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 28px 6vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: var(--max-width);
  margin: 0 auto;
}
.site-footer nav { display: flex; gap: 20px; }
.site-footer nav a:hover { text-decoration: underline; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero__content { grid-template-columns: 1fr; }
  .hero__image { order: -1; }
  .mini-grid { grid-template-columns: 1fr; }
  .chooser { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .checkbox-list { grid-template-columns: 1fr; }

  .accordion {
    flex-direction: column;
    gap: 8px;
  }
  .accordion-item {
    flex-direction: row;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
  }
  .accordion-item__number { font-size: 1.5rem; }
}

@media (max-width: 560px) {
  .hero { padding-top: 20px; }
  .hero__bar--top { justify-content: center; text-align: center; }
  .brand__partner { text-align: center; }
  .hero__text { text-align: center; }
  .hero__actions { justify-content: center; }
  .hero__text h1 { font-size: clamp(2.1rem, 9vw, 2.6rem); }
  .intro__text { padding: 36px 22px; }
  .session__body { padding: 26px 22px; }
  .session__meta { justify-content: center; }
  .about__badges img { height: 90px; }
  .site-footer { justify-content: center; text-align: center; }
}