/* ==========================================================================
   Guia Prático de Iluminação Externa — estilos
   Mobile-first. Sem frameworks.
   ========================================================================== */

:root {
  --navy-900: #0A1424;
  --navy-800: #0F1E36;
  --navy-700: #1B2E4C;
  --navy-border: #263F63;

  --white: #FFFFFF;
  --off-white: #F6F7FA;

  --ink: #0F1B2E;
  --ink-muted: #5A6478;

  --yellow: #FFC72C;
  --yellow-dark: #E3AC12;

  --blue-accent: #3E6FE0;

  --border: #E4E7EE;

  --font-display: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --max-width: 1160px;
  --max-width-narrow: 700px;

  --radius: 10px;
  --radius-lg: 18px;

  --transition: 180ms ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.6em;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
  color: var(--ink-muted);
}

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

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

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding: 52px 0;
}

.section__title {
  font-size: 1.5rem;
  max-width: 640px;
}

.section__title--light {
  color: var(--white);
}

.section__subtext {
  max-width: 560px;
  color: var(--ink-muted);
  margin-top: -0.4em;
}

.section__subtext--light {
  color: #B9C4D6;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--blue-accent);
  outline-offset: 3px;
}

/* ==========================================================================
   Botões
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.btn--primary {
  background-color: var(--yellow);
  color: var(--navy-900);
  padding: 17px 28px;
  width: 100%;
  min-height: 54px;
  box-shadow: 0 14px 30px -14px rgba(255, 199, 44, 0.55);
}

.btn--primary:hover {
  background-color: var(--yellow-dark);
}

.btn--primary:active {
  transform: scale(0.98);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: 32px 0 36px;
  background-color: var(--white);
}

.hero__grid {
  display: flex;
  flex-direction: column;
}

.hero__headline {
  font-size: 1.9rem;
  max-width: 560px;
}

.hero__subheadline {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.6em;
  max-width: 520px;
}

.hero__lead {
  font-size: 0.98rem;
  max-width: 480px;
}

.hero__mockup img {
  border-radius: var(--radius-lg);
  margin: 0 auto;
  box-shadow: 0 24px 50px -20px rgba(10, 20, 36, 0.35);
}

.hero__mockup--mobile {
  max-width: 320px;
  margin: 18px auto 22px;
}

.hero__mockup--desktop {
  display: none;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 20px 0 18px;
}

.price-box__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.4rem;
  color: var(--navy-900);
}

.price-box__note {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.hero__secure {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 10px;
  margin-bottom: 0;
  text-align: center;
}

/* ==========================================================================
   Problema
   ========================================================================== */

.problem {
  background-color: var(--off-white);
}

.problem__highlight {
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 0;
}

/* ==========================================================================
   O que você vai aprender
   ========================================================================== */

.learn-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}

.learn-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-top: 3px solid var(--blue-accent);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.learn-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35em;
}

.learn-card p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

/* ==========================================================================
   Projetos prontos (dark)
   ========================================================================== */

.projects {
  background-color: var(--navy-900);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 32px;
}

.project-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 26px 12px;
  border: 1px solid var(--navy-border);
  border-radius: var(--radius);
  background-color: var(--navy-800);
}

.project-badge__icon {
  color: var(--yellow);
  width: 34px;
  height: 34px;
}

.project-badge__icon svg {
  width: 100%;
  height: 100%;
}

.project-badge__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  color: var(--white);
  text-transform: uppercase;
}

.projects__caption {
  color: #B9C4D6;
  font-size: 0.92rem;
  margin-top: 24px;
  margin-bottom: 0;
}

/* ==========================================================================
   Tangibilidade
   ========================================================================== */

.inside__media {
  max-width: 260px;
  margin: 0 auto 32px;
}

.inside__media img {
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 44px -22px rgba(10, 20, 36, 0.35);
}

.checklist li {
  position: relative;
  padding: 10px 0 10px 30px;
  font-size: 0.98rem;
  color: var(--ink);
  border-bottom: 1px solid var(--border);
}

.checklist li:last-child {
  border-bottom: none;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 16px;
  height: 9px;
  border-left: 2.5px solid var(--blue-accent);
  border-bottom: 2.5px solid var(--blue-accent);
  transform: rotate(-45deg);
}

/* ==========================================================================
   Não compre antes de planejar
   ========================================================================== */

.warning {
  background-color: var(--off-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.warning .section__title {
  color: var(--navy-900);
}

/* ==========================================================================
   Para quem é
   ========================================================================== */

.audience-list {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
}

.audience-list li {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  padding-left: 22px;
  position: relative;
}

.audience-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--yellow-dark);
}

/* ==========================================================================
   Oferta final (dark)
   ========================================================================== */

.offer {
  background-color: var(--navy-900);
  text-align: center;
}

.offer__media {
  max-width: 220px;
  margin: 0 auto 28px;
}

.offer__media img {
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 50px -20px rgba(0, 0, 0, 0.5);
}

.offer__title {
  color: var(--white);
  font-size: 1.7rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.offer__text {
  color: #B9C4D6;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}

.offer__price {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3rem;
  color: var(--yellow);
  margin: 8px 0 22px;
}

.offer .btn--primary {
  max-width: 360px;
  margin: 0 auto;
}

.offer__proof {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
}

.offer__proof li {
  color: #B9C4D6;
  font-size: 0.88rem;
}

/* ==========================================================================
   FAQ / Accordion
   ========================================================================== */

.accordion {
  margin-top: 28px;
  border-top: 1px solid var(--border);
}

.accordion__item {
  border-bottom: 1px solid var(--border);
}

.accordion__item h3 {
  margin: 0;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: none;
  border: none;
  text-align: left;
  padding: 18px 4px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  cursor: pointer;
}

.accordion__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
}

.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  background-color: var(--blue-accent);
  transition: transform var(--transition);
}

.accordion__icon::before {
  top: 9px;
  left: 2px;
  width: 16px;
  height: 2px;
}

.accordion__icon::after {
  top: 2px;
  left: 9px;
  width: 2px;
  height: 16px;
}

.accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

.accordion__panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition);
}

.accordion__panel p {
  padding: 0 4px 18px;
  margin: 0;
  font-size: 0.95rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer__title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.4em;
}

.footer__text {
  font-size: 0.9rem;
  margin-bottom: 0.6em;
}

.footer__disclaimer {
  font-size: 0.8rem;
  color: var(--ink-muted);
  max-width: 520px;
  margin: 0 auto;
}

/* ==========================================================================
   Sticky CTA mobile
   ========================================================================== */

.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background-color: var(--white);
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 24px -16px rgba(10, 20, 36, 0.25);
  transform: translateY(100%);
  transition: transform var(--transition);
  z-index: 40;
}

.sticky-cta.is-visible {
  transform: translateY(0);
}

.sticky-cta__price {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--navy-900);
  white-space: nowrap;
}

.btn--sticky {
  width: auto;
  flex: 1;
  min-height: 46px;
  padding: 12px 20px;
}

/* ==========================================================================
   Breakpoints
   ========================================================================== */

@media (min-width: 480px) {
  .hero__headline {
    font-size: 2.3rem;
  }

  .learn-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 860px) {
  .section {
    padding: 84px 0;
  }

  .section__title {
    font-size: 2rem;
  }

  .hero {
    padding: 76px 0;
  }

  .hero__grid {
    flex-direction: row;
    align-items: center;
    gap: 64px;
  }

  .hero__content {
    flex: 1;
  }

  .hero__headline {
    font-size: 2.9rem;
  }

  .hero__subheadline {
    font-size: 1.3rem;
  }

  .hero__secure {
    text-align: left;
  }

  .hero__mockup--mobile {
    display: none;
  }

  .hero__mockup--desktop {
    display: block;
    flex: 1;
    max-width: 440px;
  }

  .btn--primary {
    width: auto;
  }

  .price-box {
    margin: 26px 0 20px;
  }

  .price-box__value {
    font-size: 2.8rem;
  }

  .learn-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .inside__grid {
    display: flex;
    align-items: center;
    gap: 64px;
  }

  .inside__media {
    flex-shrink: 0;
    max-width: 300px;
    margin: 0;
  }

  .inside__content {
    flex: 1;
  }

  .offer__grid {
    display: flex;
    align-items: center;
    text-align: left;
    gap: 56px;
  }

  .offer {
    text-align: left;
  }

  .offer__media {
    flex-shrink: 0;
    max-width: 260px;
    margin: 0;
  }

  .offer__title,
  .offer__text {
    margin-left: 0;
    margin-right: 0;
  }

  .offer .btn--primary {
    margin: 0;
  }

  .offer__proof {
    align-items: flex-start;
  }

  .sticky-cta {
    display: none;
  }
}

@media (min-width: 1200px) {
  .hero__headline {
    font-size: 3.2rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}