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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
figure {
  margin: 0;
}

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

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------- Design tokens ---------- */
:root {
  /* Cores */
  --azul-petroleo: #0E2A3D;
  --grafite: #2A2E35;
  --preto-suave: #14181C;
  --branco: #FFFFFF;
  --cinza-claro: #F4F6F8;
  --cinza-medio: #8B97A0;
  --esmeralda: #0E9F6E;

  /* Tipografia */
  --font-heading: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;

  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-24: 1.5rem;
  --fs-32: 2rem;
  --fs-48: 3rem;
  --fs-64: 4rem;

  /* Espaçamento (base 8px) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;

  /* Layout */
  --container-max: 1200px;

  /* Transições */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease-out;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--grafite);
  background-color: var(--branco);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--grafite);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

section {
  padding: var(--space-7) 0;
}

/* ---------- Foco visível ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--esmeralda);
  outline-offset: 2px;
}

/* ---------- Botões ---------- */
.btn {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  border-radius: 4px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-16);
  text-align: center;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn--primary {
  background-color: var(--esmeralda);
  color: var(--branco);
}

.btn--primary:hover {
  background-color: #0c8a5e;
  box-shadow: 0 4px 12px rgba(14, 159, 110, 0.3);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .reveal {
    transform: none;
    transition: opacity var(--transition-slow);
  }
}

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background-color: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header.is-scrolled {
  background-color: var(--branco);
  box-shadow: 0 1px 0 var(--cinza-medio);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.header__logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--grafite);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__link {
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--grafite);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--esmeralda);
}

.nav__cta {
  padding: var(--space-1) var(--space-3);
  font-size: var(--fs-14);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 0 auto;
  background-color: var(--grafite);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1023px) {
  .nav {
    position: fixed;
    inset: 80px 0 0 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-3);
    background-color: var(--branco);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .nav.is-open {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .menu-toggle {
    display: flex;
  }
}

/* ---------- Hero ---------- */
.hero {
  background-color: var(--azul-petroleo);
  color: var(--branco);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}

.hero__title {
  font-size: var(--fs-48);
  color: var(--branco);
  margin-bottom: var(--space-3);
}

.hero__subtitle {
  font-size: var(--fs-18);
  color: var(--cinza-medio);
  margin-bottom: var(--space-4);
  max-width: 480px;
}

.hero__graphic-wrap {
  width: 100%;
}

.hero__graphic {
  width: 100%;
  height: auto;
}

.hero__graphic .draw {
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  animation: draw-line 1.2s ease-out forwards;
  animation-delay: var(--draw-delay, 0s);
}

@keyframes draw-line {
  to {
    stroke-dashoffset: 0;
  }
}

@media (max-width: 1023px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__title {
    font-size: var(--fs-32);
  }

  .hero__graphic-wrap {
    order: -1;
    max-width: 360px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__graphic .draw {
    animation: none;
    stroke-dashoffset: 0;
  }
}

/* ---------- Section title ---------- */
.section-title {
  font-size: var(--fs-32);
  text-align: center;
  margin-bottom: var(--space-6);
}

/* ---------- Cards (shared by Problemas e Diferenciais) ---------- */
.card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid var(--cinza-medio);
  border-radius: 4px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(14, 42, 61, 0.08);
}

.icon {
  width: 32px;
  height: 32px;
  color: var(--esmeralda);
}

.card__label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-18);
  color: var(--grafite);
}

/* ---------- Problemas ---------- */
.problemas {
  background-color: var(--branco);
}

.problemas__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

@media (max-width: 1023px) {
  .problemas__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .problemas__grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Solução ---------- */
.solucao {
  background-color: var(--cinza-claro);
}

.solucao__inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.solucao__text {
  font-size: var(--fs-18);
  color: var(--grafite);
}

/* ---------- Metodologia ---------- */
.metodologia {
  background-color: var(--branco);
}

.stepper {
  position: relative;
}

.stepper__line {
  position: absolute;
  top: 17px;
  left: calc(100% / 12);
  right: calc(100% / 12);
  height: 2px;
  background-color: var(--cinza-medio);
}

.stepper__line-fill {
  width: 0%;
  height: 100%;
  background-color: var(--esmeralda);
  transition: width 1.5s ease-out;
}

.stepper.is-filled .stepper__line-fill {
  width: 100%;
}

.stepper__list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
  position: relative;
}

.stepper__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
}

.stepper__dot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--branco);
  border: 2px solid var(--esmeralda);
  color: var(--esmeralda);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-14);
  z-index: 1;
}

.stepper__label {
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--grafite);
}

@media (max-width: 767px) {
  .stepper__line {
    top: 0;
    left: 17px;
    right: auto;
    bottom: 0;
    width: 2px;
    height: auto;
  }

  .stepper__line-fill {
    width: 100%;
    height: 0%;
    transition: height 1.5s ease-out;
  }

  .stepper.is-filled .stepper__line-fill {
    width: 100%;
    height: 100%;
  }

  .stepper__list {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .stepper__item {
    flex-direction: row;
    text-align: left;
    gap: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .stepper__line-fill {
    transition: none;
  }
}

/* ---------- Áreas de Atuação ---------- */
.areas {
  background-color: var(--cinza-claro);
}

.areas__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.area-card {
  padding: var(--space-4);
  background-color: var(--branco);
  border-top: 2px solid var(--esmeralda);
  border-radius: 4px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.area-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(14, 42, 61, 0.08);
}

.area-card__title {
  font-size: var(--fs-24);
  margin-bottom: var(--space-1);
}

.area-card__desc {
  font-size: var(--fs-16);
  color: var(--grafite);
}

@media (max-width: 767px) {
  .areas__grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Diferenciais ---------- */
.diferenciais {
  background-color: var(--branco);
}

.diferenciais__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

@media (max-width: 1023px) {
  .diferenciais__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .diferenciais__grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- CTA Final ---------- */
.cta-final {
  background-color: var(--azul-petroleo);
  color: var(--branco);
  text-align: center;
}

.cta-final__inner {
  max-width: 640px;
  margin: 0 auto;
}

.cta-final__title {
  font-size: var(--fs-32);
  color: var(--branco);
  margin-bottom: var(--space-2);
}

.cta-final__text {
  font-size: var(--fs-18);
  color: var(--cinza-medio);
  margin-bottom: var(--space-4);
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--preto-suave);
  color: var(--cinza-medio);
  padding: var(--space-6) 0 var(--space-3);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--grafite);
}

.footer__logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--branco);
  margin-bottom: var(--space-1);
}

.footer__tagline {
  font-size: var(--fs-14);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer__nav a,
.footer__email {
  font-size: var(--fs-14);
  transition: color var(--transition-fast);
}

.footer__nav a:hover,
.footer__email:hover {
  color: var(--branco);
}

.footer__bottom {
  padding-top: var(--space-3);
  font-size: var(--fs-14);
  text-align: center;
}

@media (max-width: 767px) {
  .footer__inner {
    flex-direction: column;
  }
}