/* Tipografia e tema */
:root {
  --bg-0: #070b16;
  --bg-1: #0a0f1e;
  --surface-0: #0f1629;
  --surface-1: #131c31;
  --border: #1a2747;
  --text-0: #e6edf7;
  --text-1: #b6c2d9;
  --muted: #8aa0c6;
  --primary: #8b5cf6; /* violeta */
  --accent: #22d3ee;  /* ciano */
  --success: #22c55e;
  --warning: #f59e0b;
  --radius: 14px;
  --shadow-1: 0 10px 30px rgba(0,0,0,.35), 0 1px 0 rgba(255,255,255,.03) inset;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text-0);
  background: radial-gradient(1200px 800px at 20% -10%, #13203f 0%, transparent 60%),
              radial-gradient(900px 600px at 110% -10%, #1a2b54 0%, transparent 55%),
              linear-gradient(180deg, var(--bg-0), var(--bg-1));
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", "Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3 {
  margin: 0 0 12px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
}
h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); }
h2 { font-size: clamp(1.45rem, 1.2vw + 1rem, 2rem); }
h3 { font-size: clamp(1.1rem, .6vw + 1rem, 1.25rem); }
p { margin: 0 0 16px; color: var(--text-1); }
.lead { font-size: clamp(1.05rem, .6vw + 1rem, 1.2rem); color: var(--text-0); }
.eyebrow { color: var(--muted); text-transform: uppercase; letter-spacing: .12em; font-weight: 600; font-size: .8rem; display: inline-flex; align-items: center; gap: .5rem; }
.grad { background: linear-gradient(90deg, var(--accent), var(--primary)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.accent { color: var(--accent); }
.micro { color: var(--muted); font-size: .85rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: -999px; top: -999px; background: var(--surface-1); color: var(--text-0); padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { left: 12px; top: 12px; z-index: 9999; }

/* Layout */
.container { width: min(1200px, 100% - 40px); margin: 0 auto; }
.section { padding: 72px 0; }
.section--alt { background: linear-gradient(180deg, rgba(19,28,49,.35), rgba(10,15,30,.35)); }
.section__head { text-align: center; margin-bottom: 36px; }
.section__sub { color: var(--text-1); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,15,30,.6);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(26,39,71,.35);
}
.site-header[data-elevate].is-scrolled {
  box-shadow: 0 10px 25px rgba(0,0,0,.35);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text-0); font-weight: 700; letter-spacing: .2px; }
.brand-icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(145deg, var(--surface-0), var(--surface-1)); box-shadow: var(--shadow-1); color: var(--accent); }
.brand--muted .brand-icon { color: var(--muted); background: transparent; box-shadow: none; border: 1px solid var(--border); }
.brand-text { font-family: "Space Grotesk", Inter, sans-serif; font-size: 1rem; }
.brand-img { display: block; height: 26px; width: auto; }
.site-footer .brand-img { height: 22px; opacity: .95; }

.nav-toggle {
  display: none; appearance: none; border: 1px solid var(--border); background: var(--surface-0); color: var(--text-0);
  width: 44px; height: 40px; border-radius: 10px; align-items: center; justify-content: center; cursor: pointer;
}
.menu { display: flex; gap: 18px; list-style: none; margin: 0; padding: 0; align-items: center; }
.menu a { color: var(--text-1); text-decoration: none; font-weight: 500; padding: 10px 12px; border-radius: 10px; }
.menu a:hover { color: var(--text-0); background: rgba(255,255,255,.04); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid transparent; border-radius: 12px; cursor: pointer;
  color: var(--text-0); text-decoration: none; font-weight: 600;
  padding: 12px 16px; transition: transform .06s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn:active { transform: translateY(1px); }
.btn--sm { padding: 8px 12px; font-size: .95rem; }
.btn--lg { padding: 14px 18px; font-size: 1.05rem; }
.btn--xl { padding: 16px 22px; font-size: 1.15rem; }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  box-shadow: 0 10px 24px rgba(139,92,246,.25), 0 2px 0 rgba(255,255,255,.06) inset;
}
.btn--primary:hover { filter: brightness(1.05); }
.btn--ghost {
  background: transparent; border-color: var(--border); color: var(--text-0);
}
.btn--ghost:hover { background: rgba(255,255,255,.04); }

/* Hero */
.hero { position: relative; padding: 72px 0; overflow: hidden; }
.stars-bg {
  position: absolute; inset: 0; pointer-events: none; opacity: .8;
  background:
    radial-gradient(1px 1px at 10% 30%, rgba(255,255,255,.7) 0, transparent 60%),
    radial-gradient(1px 1px at 30% 70%, rgba(255,255,255,.5) 0, transparent 60%),
    radial-gradient(1px 1px at 50% 20%, rgba(255,255,255,.65) 0, transparent 60%),
    radial-gradient(1px 1px at 80% 40%, rgba(255,255,255,.55) 0, transparent 60%),
    radial-gradient(2px 2px at 20% 80%, rgba(255,255,255,.35) 0, transparent 60%);
  animation: twinkle 6s ease-in-out infinite alternate;
}
@keyframes twinkle { 0% { opacity: .55; } 100% { opacity: .9; } }
.hero__grid {
  display: grid; align-items: center; gap: 32px;
  grid-template-columns: 1.05fr .95fr;
}
.hero__copy .hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.hero__meta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 18px; color: var(--text-1); }
.hero__meta .meta-item { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.04); padding: 8px 12px; border-radius: 999px; border: 1px solid var(--border); }
.hero__media { display: grid; justify-items: end; }
.hero__card {
  background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  overflow: hidden; margin: 0; max-width: 560px;
}
.hero__card img { display: block; width: 100%; height: auto; }
.hero__card figcaption { padding: 12px 14px; color: var(--text-1); font-size: .95rem; border-top: 1px solid var(--border); }

/* Responsive video frame */
.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}
.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.video-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.video-card h3 {
  margin: 10px 4px 0; font-size: 1rem; color: var(--text-0);
}

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature {
  background: linear-gradient(145deg, rgba(19,28,49,.7), rgba(10,15,30,.7));
  border: 1px solid var(--border); padding: 18px; border-radius: var(--radius);
}
.feature .icon {
  width: 44px; height: 44px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--surface-0), var(--surface-1));
  border: 1px solid var(--border); border-radius: 12px; color: var(--accent); margin-bottom: 10px;
}

/* Curriculum */
.curriculum { display: grid; gap: 12px; }
.module {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
  border-radius: 14px; overflow: hidden;
}
.module summary {
  list-style: none; cursor: pointer; padding: 14px 16px; display: flex; align-items: center; gap: 10px; font-weight: 600;
  min-height: 44px;
}
.module summary::-webkit-details-marker { display: none; }
.module[open] summary { border-bottom: 1px solid var(--border); }
.module ul { margin: 0; padding: 12px 18px 18px 36px; color: var(--text-1); }
.module summary i { transition: transform .2s ease; color: var(--accent); }
.module[open] summary i { transform: rotate(20deg) scale(1.05); }

/* Instructor */
.instructor {
  display: grid; gap: 28px; align-items: center; grid-template-columns: .9fr 1.1fr;
}
.instructor__media img {
  width: 100%; height: auto; display: block; border-radius: var(--radius);
  border: 1px solid var(--border);
}
.instructor__icon {
  width: 220px; height: 220px;
  border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  background:
    radial-gradient(60% 60% at 30% 30%, rgba(255,255,255,.08) 0%, transparent 80%),
    linear-gradient(145deg, var(--surface-0), var(--surface-1));
  box-shadow: var(--shadow-1);
  color: var(--accent);
  position: relative;
  animation: floatY 6s ease-in-out infinite;
  transition: transform .25s ease, filter .25s ease;
}
.instructor__icon i { font-size: 88px; }
.instructor__icon::after {
  content: "";
  position: absolute; inset: -8px;
  border-radius: 50%;
  border: 1px dashed rgba(34, 211, 238, .35);
  pointer-events: none;
}
.instructor__icon:hover {
  transform: translateY(-2px) scale(1.02) rotate(-1deg);
  filter: drop-shadow(0 10px 24px rgba(34, 211, 238, .2));
}
@keyframes floatY {
  0% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
  100% { transform: translateY(0); }
}
.ticks { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 10px; color: var(--text-1); }
.ticks li { display: grid; grid-auto-flow: column; grid-template-columns: 24px 1fr; align-items: start; gap: 10px; }
.ticks i { color: var(--success); margin-top: 2px; }

/* Badges (instructor meta) */
.badges { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 10px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 999px;
  border: 1px solid var(--border); background: rgba(255,255,255,.04);
  color: var(--text-1); font-weight: 600; font-size: .9rem;
}
.badge i { color: var(--warning); }

/* Testimonials */
.testimonials {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.testimonial {
  background: linear-gradient(145deg, rgba(19,28,49,.7), rgba(10,15,30,.7));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 16px;
}
.testimonial blockquote { margin: 0 0 12px; color: var(--text-0); font-size: 1rem; }
.testimonial figcaption { display: grid; grid-template-columns: 40px 1fr; gap: 10px; align-items: center; color: var(--text-1); }
.testimonial img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); }

/* Gallery */
.gallery__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.gallery__item {
  position: relative; overflow: hidden; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface-0);
}
.gallery__item img {
  display: block; width: 100%; height: 100%; object-fit: cover; transform: scale(1.02);
  transition: transform .4s ease, filter .3s ease;
}
.gallery__item::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(0deg, rgba(0,0,0,.25), transparent 45%);
  opacity: 0; transition: opacity .25s ease;
}
.gallery__item:hover img { transform: scale(1.06); filter: brightness(1.05); }
.gallery__item:hover::after { opacity: 1; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; display: grid; place-items: center; background: rgba(0,0,0,.8);
  padding: 24px; z-index: 1000; opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s ease;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox__inner {
  max-width: 1200px; width: 100%;
}
.lightbox__img {
  display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow-1);
}
.lightbox__close {
  position: absolute; top: 16px; right: 16px;
  width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px;
  border: 1px solid var(--border); background: linear-gradient(145deg, var(--surface-0), var(--surface-1)); color: var(--text-0);
  cursor: pointer;
}

/* Tabs (pos-producao) */
.tabs { display: grid; gap: 12px; }
.tab-list { display: flex; gap: 8px; flex-wrap: wrap; }
.tab {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 12px;
  background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
  border: 1px solid var(--border); color: var(--text-1); cursor: pointer; font-weight: 600;
}
.tab.is-active { color: var(--text-0); border-color: rgba(34,211,238,.5); box-shadow: 0 6px 16px rgba(34,211,238,.12) }
.tab:hover { filter: brightness(1.05); }
.tab-panel {
  border: 1px solid var(--border); border-radius: 16px;
  background: linear-gradient(145deg, rgba(19,28,49,.7), rgba(10,15,30,.7));
}
.panel__body { padding: 16px; }

/* Knowledge section (sobre-astrofotografia) */
.knowledge .section__head { margin-bottom: 20px; }
.knowledge__intro { display: grid; gap: 12px; }
.callout {
  border: 1px solid var(--border); border-radius: 16px; padding: 16px;
  background: linear-gradient(145deg, rgba(19,28,49,.6), rgba(10,15,30,.6));
}
.tip {
  border: 1px dashed rgba(34,211,238,.5); border-radius: 12px; padding: 12px;
  background: rgba(34,211,238,.06); color: var(--text-0);
}
.knowledge__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.knowledge__block {
  border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
  background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
}
.knowledge__block summary {
  display: flex; align-items: center; gap: 10px; padding: 14px 16px; cursor: pointer; list-style: none; font-weight: 700;
  min-height: 44px;
}
.knowledge__block summary::-webkit-details-marker { display: none; }
.knowledge__block[open] summary { border-bottom: 1px solid var(--border); }
.knowledge__block i { color: var(--accent); }
.block__body { padding: 14px 16px; color: var(--text-1); }
.bullets { margin: 0; padding-left: 18px; }
.bullets li { margin-bottom: 6px; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.card {
  border: 1px solid var(--border); border-radius: 12px; padding: 12px;
  background: linear-gradient(145deg, rgba(19,28,49,.6), rgba(10,15,30,.6));
}
.card .mini { margin: 8px 0 0; padding-left: 18px; }
.chip-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }
.chip-group .prompt { margin-right: 4px; }
.chip {
  border: 1px solid var(--border); border-radius: 999px; padding: 8px 12px; background: rgba(255,255,255,.04);
  color: var(--text-0); cursor: pointer; transition: background .2s ease, border-color .2s ease, transform .06s ease;
}
.chip:hover { background: rgba(255,255,255,.06); }
.chip.is-selected { border-color: rgba(34,211,238,.6); background: rgba(34,211,238,.12); }
.chip-result { margin-left: 6px; color: var(--muted); }
/* Bonuses */
.bonuses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.bonus {
  background: linear-gradient(145deg, rgba(19,28,49,.7), rgba(10,15,30,.7));
  border: 1px solid var(--border); padding: 18px; border-radius: var(--radius);
  display: grid; gap: 8px; align-content: start;
}
.bonus .icon {
  width: 44px; height: 44px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--surface-0), var(--surface-1));
  border: 1px solid var(--border); border-radius: 12px; color: var(--accent); margin-bottom: 6px;
}

/* Pricing */
.pricing { display: grid; justify-items: center; }
.pricing__card {
  width: min(680px, 100%);
  background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
  border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: var(--shadow-1);
  text-align: center;
}
.price { display: inline-flex; align-items: baseline; gap: 6px; margin: 10px 0 14px; }
.price__currency { color: var(--muted); font-weight: 700; }
.price__value { font-size: clamp(2rem, 3.5vw + 1rem, 3.25rem); font-weight: 800; letter-spacing: -1px; }
.price__period { color: var(--muted); }

/* Product description */
.product {
  display: grid; gap: 28px; align-items: start; grid-template-columns: 1.2fr .8fr;
}
.product__aside h3 { font-size: 1.05rem; }
.facts {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.product__cover { margin-bottom: 12px; }
.product__cover img {
  display: block; width: 100%; height: auto;
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow-1);
}
.fact {
  display: grid; grid-template-columns: 28px 1fr; gap: 10px; align-items: center;
  background: linear-gradient(145deg, rgba(19,28,49,.7), rgba(10,15,30,.7));
  border: 1px solid var(--border); border-radius: 12px; padding: 12px;
}
.fact i { color: var(--accent); }
.fact strong { display: block; color: var(--text-0); }
.fact span { color: var(--text-1); font-size: .95rem; }

/* Form */
.signup { display: grid; justify-items: center; }
.form {
  width: min(640px, 100%); background: linear-gradient(145deg, rgba(19,28,49,.7), rgba(10,15,30,.7));
  border: 1px solid var(--border); border-radius: 16px; padding: 18px;
}
.form__row { display: grid; gap: 8px; margin-bottom: 12px; }
.form label { color: var(--text-0); font-weight: 600; }
.form input {
  width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--surface-0); color: var(--text-0);
}
.form input::placeholder { color: #8aa0c6; }
.form input:focus { outline: none; border-color: #3b82f6; box-shadow: 0 0 0 3px rgba(59,130,246,.25); }

/* Footer */
.site-footer { padding: 32px 0; border-top: 1px solid var(--border); background: rgba(10,15,30,.5); }
.footer__grid { display: grid; grid-template-columns: 1.2fr 1fr .8fr; align-items: start; gap: 18px; }
.foot-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.foot-links a { color: var(--text-1); text-decoration: none; }
.foot-links a:hover { color: var(--text-0); }
.foot-title { margin: 0 0 8px; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; }
.socials { display: inline-flex; gap: 12px; }
.socials a {
  width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--border);
  border-radius: 12px; color: var(--text-0); text-decoration: none; background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
}
.socials a:hover { filter: brightness(1.08); }

/* Reveal animation */
[data-reveal] { opacity: 0; transform: translateY(10px); transition: opacity .5s ease, transform .5s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; }
  .instructor { grid-template-columns: 1fr; }
  .instructor__icon { width: 180px; height: 180px; }
  .instructor__icon i { font-size: 72px; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .gallery__grid { grid-template-columns: 1fr 1fr; }
  .bonuses { grid-template-columns: 1fr 1fr; }
  .knowledge__grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .testimonials { grid-template-columns: 1fr 1fr; }
  .features { grid-template-columns: 1fr 1fr; }
  .product { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .site-header .container { padding: 10px 0; }
  .nav-toggle { display: inline-flex; }
  .menu {
    position: absolute; right: 20px; left: 20px; top: 64px; flex-direction: column; gap: 6px;
    background: linear-gradient(145deg, var(--surface-0), var(--surface-1));
    border: 1px solid var(--border); padding: 10px; border-radius: 12px; display: none;
  }
  .menu.menu--open { display: flex; }
  .features { grid-template-columns: 1fr; }
  .testimonials { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
  .gallery__grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .bonuses { grid-template-columns: 1fr; }
  .knowledge__intro { gap: 10px; }
  .footer__grid { grid-template-columns: 1fr; }
}