/* ==========================================================================
   Alertaê — estilos da landing
   Cores oficiais: laranja #fb3c03 | textos #06131f
   ========================================================================== */

:root {
  --color-orange: #fb3c03;
  --color-orange-hover: #e23602;
  --color-orange-pressed: #c43002;
  --color-orange-soft: #fff4f0;
  --color-text: #06131f;
  --color-text-muted: #3d4a56;
  --color-text-on-dark: #f5f7f9;
  --color-bg: #ffffff;
  --color-bg-soft: #fff4f0;
  --color-bg-dark: #06131f;
  --color-border: #ead9d2;
  --color-success: #1f7a4d;
  --color-error: #b42318;
  --color-focus: #fb3c03;
  --font: "Plus Jakarta Sans", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius-pill: 999px;
  --radius-img: 22px;
  --radius-card: 18px;
  --header-h: 84px;
  --shadow-btn: 0 8px 20px rgba(251, 60, 3, 0.22);
  --container: 1180px;
  --space: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-orange);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-orange-hover);
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 800;
}

h3 {
  font-size: 1.125rem;
  font-weight: 700;
}

p {
  margin: 0 0 1rem;
  color: var(--color-text);
}

p:last-child {
  margin-bottom: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: var(--color-text);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.visually-hidden {
  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: 1rem;
  top: -4rem;
  z-index: 1000;
  background: var(--color-text);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 8px;
}

.skip-link:focus {
  top: 1rem;
  color: #fff;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.narrow {
  width: min(100% - 2rem, 760px);
}

.accent {
  color: var(--color-orange);
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  color: var(--color-orange);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   Botões — hover, foco, carregamento, sucesso e erro
   -------------------------------------------------------------------------- */
.btn {
  --btn-bg: var(--color-orange);
  --btn-fg: #ffffff;
  --btn-bd: var(--color-orange);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0.7rem 1.35rem 0.7rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 2px solid var(--btn-bd);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease,
    transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  background: var(--color-orange-hover);
  border-color: var(--color-orange-hover);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn:active {
  background: var(--color-orange-pressed);
  transform: translateY(1px);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--color-orange);
  --btn-bd: var(--color-orange);
}

.btn--ghost:hover {
  background: var(--color-orange-soft);
  color: var(--color-orange-hover);
  border-color: var(--color-orange-hover);
  box-shadow: none;
}

.btn--on-dark {
  box-shadow: var(--shadow-btn);
}

.btn__icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.btn--ghost .btn__icon {
  background: var(--color-orange-soft);
}

.btn__icon img {
  width: 15px;
  height: 15px;
  object-fit: contain;
}

.btn[data-state="loading"] {
  pointer-events: none;
  opacity: 0.78;
}

.btn[data-state="loading"] .btn__label::after {
  content: "";
  display: inline-block;
  width: 0.9em;
  height: 0.9em;
  margin-left: 0.5rem;
  border: 2px solid #fff;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: -0.15em;
}

.btn[data-state="success"] {
  --btn-bg: var(--color-success);
  --btn-bd: var(--color-success);
}

.btn[data-state="error"] {
  --btn-bg: var(--color-error);
  --btn-bd: var(--color-error);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --------------------------------------------------------------------------
   Cabeçalho
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 8px 24px rgba(6, 19, 31, 0.06);
}

.header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}

.header__inner--simple {
  grid-template-columns: auto auto;
  justify-content: space-between;
}

.nav__cta {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
}

.brand__logo {
  height: 42px;
  width: auto;
  object-fit: contain;
}

.brand__logo--footer {
  height: 40px;
}

.nav__list {
  display: flex;
  justify-content: center;
  gap: 0.2rem 1.35rem;
  flex-wrap: wrap;
}

.nav__link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}

.nav__link:hover,
.nav__link:focus-visible,
.nav__link.is-active {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header__actions .btn {
  min-height: 44px;
  padding-inline: 1.15rem 0.85rem;
  font-size: 0.92rem;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 2px solid var(--color-text);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -6px;
}
.nav-toggle__bars::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  padding: 4.5rem 0 3rem;
  text-align: center;
}

.hero__title {
  max-width: 18ch;
  margin: 0 auto 1.1rem;
}

.hero__lead {
  max-width: 46rem;
  margin: 0 auto 1.75rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.hero__trust {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

.hero__visual {
  margin: 0 0 1.5rem;
}

.city-monitor {
  width: 100%;
  height: auto;
  border-radius: var(--radius-img);
  box-shadow: 0 16px 40px rgba(6, 19, 31, 0.08);
}

.sensor-nodes circle {
  transform-origin: center;
}

.media-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.75rem;
}

.media-strip img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 18px;
}

/* --------------------------------------------------------------------------
   Seções
   -------------------------------------------------------------------------- */
.section {
  padding: 5rem 0;
}

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

.section__header {
  max-width: 40rem;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.section__intro {
  color: var(--color-text-muted);
}

.section__intro a,
.info-card a {
  font-weight: 600;
  text-decoration: underline;
}

.section__actions {
  margin-top: 2rem;
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.split__media img {
  width: 100%;
  border-radius: var(--radius-img);
  object-fit: cover;
  aspect-ratio: 16 / 11;
}

.split--form {
  align-items: start;
  margin-bottom: 0;
}

.challenge-grid,
.card-grid,
.feature-grid {
  display: grid;
  gap: 1.1rem;
}

.challenge-grid,
.card-grid,
.feature-grid {
  grid-template-columns: repeat(3, 1fr);
}

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

.challenge-card,
.info-card,
.feature-grid li,
.process__step,
.collab-list li,
.project-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.4rem 1.35rem;
}

.challenge-card__icon,
.info-card__icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 0.85rem;
  border-radius: 14px;
  background: var(--color-orange-soft);
  color: var(--color-orange);
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
}

.project-grid > li {
  display: flex;
}

.project-card {
  padding: 1.75rem 1.6rem;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
}

.project-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.9rem;
}

.project-card p {
  color: var(--color-text-muted);
}

.project-card .project-card__tag {
  margin: 0 0 0.55rem;
  color: var(--color-orange);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project-card .project-card__note {
  margin-top: auto;
  padding: 0.95rem 1rem;
  background: var(--color-orange-soft);
  border-radius: 12px;
  font-size: 0.92rem;
  color: var(--color-text);
}

.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  counter-reset: step;
  margin-bottom: 1.5rem;
}

.process__num {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 0.85rem;
  border-radius: 50%;
  background: var(--color-orange);
  color: #fff;
  font-weight: 800;
}

.notice {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  padding: 1.1rem 1.2rem;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--color-border);
}

.notice img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  flex-shrink: 0;
}

.collab-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.collab-list li:last-child {
  grid-column: 1 / -1;
}

.cta-banner {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding: 4.5rem 0;
  text-align: center;
}

.cta-banner h2,
.cta-banner p {
  color: var(--color-text-on-dark);
}

.cta-banner p {
  max-width: 36rem;
  margin: 0 auto 1.6rem;
}

.cta-banner .accent,
.cta-banner a.btn {
  color: #fff;
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  padding: 1.15rem 2rem 1.15rem 0;
  position: relative;
  color: var(--color-text);
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 1.1rem;
  color: var(--color-orange);
  font-size: 1.4rem;
  line-height: 1;
}

.faq__item[open] summary::after {
  content: "–";
}

.faq__item p {
  padding-bottom: 1.1rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Formulário
   -------------------------------------------------------------------------- */
.form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 22px;
  padding: 1.5rem;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form__field {
  margin-bottom: 1rem;
}

.form__field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form__field input,
.form__field select,
.form__field textarea {
  width: 100%;
  border: 1.5px solid var(--color-border);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  background: #fff;
}

.form__field input:hover,
.form__field select:hover,
.form__field textarea:hover {
  border-color: #c9b4ab;
}

.form__field input:focus-visible,
.form__field select:focus-visible,
.form__field textarea:focus-visible {
  border-color: var(--color-orange);
}

.form__field.is-invalid input,
.form__field.is-invalid select,
.form__field.is-invalid textarea {
  border-color: var(--color-error);
}

.form__error {
  color: var(--color-error);
  font-size: 0.85rem;
  margin-top: 0.35rem;
}

.form__field--check {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 0.7rem;
  align-items: start;
}

.form__field--check input {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.25rem;
  accent-color: var(--color-orange);
}

.form__field--check label {
  font-weight: 500;
  margin: 0;
}

.form__field--check .form__error {
  grid-column: 1 / -1;
}

.form__status {
  margin-bottom: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  font-weight: 600;
}

.form__status.is-success {
  background: #e8f6ee;
  color: var(--color-success);
}

.form__status.is-error {
  background: #fdecec;
  color: var(--color-error);
}

.btn--submit {
  width: 100%;
}

.contact-meta {
  margin-top: 1.5rem;
}

.contact-meta li {
  margin-bottom: 0.4rem;
}

/* --------------------------------------------------------------------------
   Rodapé
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding: 3.5rem 0 1.5rem;
}

.site-footer h2,
.site-footer p,
.site-footer a,
.site-footer li {
  color: var(--color-text-on-dark);
}

.site-footer h2 {
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
}

.site-footer a:hover {
  color: var(--color-orange);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer__brand p {
  color: #c5ccd3;
  margin-top: 1rem;
  max-width: 36ch;
}

.footer__legal {
  padding-top: 1.4rem;
  font-size: 0.9rem;
}

.footer__legal p {
  color: #c5ccd3;
  margin-bottom: 0.6rem;
}

.legal-page {
  padding: 7rem 0 4rem;
}

.legal-page .narrow p,
.legal-page .narrow li {
  color: var(--color-text-muted);
}

.legal-page ul {
  list-style: disc;
  padding-left: 1.2rem;
  margin-bottom: 1rem;
}

/* --------------------------------------------------------------------------
   Animações sutis
   -------------------------------------------------------------------------- */
.pulse-ring {
  transform-origin: 560px 72px;
  animation: pulse 3.6s ease-out infinite;
}

@keyframes pulse {
  0% {
    opacity: 0.9;
  }
  100% {
    opacity: 0.15;
  }
}

/* --------------------------------------------------------------------------
   Responsivo
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .nav {
    display: none;
  }

  .header__inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav.is-open {
    display: block;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1rem 1.25rem;
  }

  .nav.is-open .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .nav.is-open .nav__cta {
    display: block;
    margin-top: 0.75rem;
  }

  .header__actions .btn--primary {
    display: none;
  }

  .split,
  .split--form,
  .process,
  .project-grid,
  .card-grid--4,
  .collab-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 800px) {
  .hero {
    padding-top: 2.5rem;
  }

  .media-strip,
  .challenge-grid,
  .card-grid,
  .feature-grid,
  .split,
  .split--form,
  .process,
  .project-grid,
  .card-grid--4,
  .collab-list,
  .form__row,
  .footer__grid {
    grid-template-columns: 1fr;
  }

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

  .collab-list li:last-child {
    grid-column: auto;
  }

  .section {
    padding: 3.5rem 0;
  }
}

@media (max-width: 520px) {
  .hero__actions .btn,
  .section__actions .btn {
    width: 100%;
  }

  .media-strip {
    grid-auto-flow: column;
    grid-template-columns: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 0.4rem;
  }

  .media-strip li {
    min-width: 58vw;
    scroll-snap-align: start;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}