/* ============================================
   GestIAFlow — Style Sheet
   Metodologia: BEM + CSS Custom Properties
   ============================================ */

/* ----- Variáveis (Custom Properties) ----- */
:root {
  /* Cores base (dark theme) */
  --bg-primary: #1d2328;
  --bg-secondary: #262e35;
  --bg-card: #2f3840;
  --bg-glass: rgba(47, 56, 64, 0.6);
  --bg-glass-hover: rgba(47, 56, 64, 0.8);

  /* Acento roxo */
  --accent-primary: #7c3aed;
  --accent-secondary: #8b5cf6;
  --accent-tertiary: #a78bfa;
  --accent-glow: rgba(124, 58, 237, 0.3);
  --accent-glow-strong: rgba(124, 58, 237, 0.5);

  /* Texto */
  --text-primary: #edf2f7;
  --text-secondary: #a0aec0;
  --text-muted: #718096;

  /* Bordas */
  --border-color: rgba(255, 255, 255, 0.06);
  --border-color-hover: rgba(124, 58, 237, 0.3);

  /* Tipografia */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Tamanhos de fonte */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.25rem;

  /* Espaçamentos */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Bordas arredondadas */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transições */
  --transition-fast: 200ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Glassmorphism */
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --glass-blur: 12px;

  /* Container */
  --container-max: 1120px;
  --container-padding: 1.5rem;
}

/* ----- Reset ----- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

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

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

ul {
  list-style: none;
}

/* ----- Container ----- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ----- Botões ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.5);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  border-color: var(--accent-primary);
  color: var(--accent-tertiary);
  background: rgba(124, 58, 237, 0.08);
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: var(--text-base);
}

/* ----- Header / Nav ----- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(29, 35, 40, 0.85);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border-bottom: var(--glass-border);
  transition: background var(--transition-base);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

.header__logo {
  flex-shrink: 0;
}

.header__logo-img {
  height: 36px;
  width: auto;
}

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

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.header__nav-link:hover,
.header__nav-link:focus-visible {
  color: var(--text-primary);
  border-bottom-color: var(--accent-primary);
}

/* Hamburger */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 110;
}

.header__hamburger-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.header__hamburger[aria-expanded="true"] .header__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger[aria-expanded="true"] .header__hamburger-bar:nth-child(2) {
  opacity: 0;
}

.header__hamburger[aria-expanded="true"] .header__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----- Hero ----- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: var(--space-2xl) 0;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 50%, rgba(124, 58, 237, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 30%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 80%, rgba(124, 58, 237, 0.05) 0%, transparent 50%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 40px,
      rgba(255, 255, 255, 0.015) 40px,
      rgba(255, 255, 255, 0.015) 41px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      rgba(255, 255, 255, 0.015) 40px,
      rgba(255, 255, 255, 0.015) 41px
    );
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.05);
    opacity: 1;
  }
}

.hero__container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ----- Sections ----- */
.section {
  padding: var(--space-2xl) 0;
}

.section--dark {
  background: var(--bg-secondary);
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-xl);
}

.section__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-tertiary);
  background: rgba(124, 58, 237, 0.12);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

.section__desc {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: 1.7;
}

/* ----- Grid ----- */
.grid {
  display: grid;
  gap: var(--space-md);
}

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

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

/* ----- Card ----- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-glow);
  box-shadow: 0 8px 32px rgba(124, 58, 237, 0.15);
}

/* Card — Solução */
.card--solucao {
  text-align: center;
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(124, 58, 237, 0.12);
  color: var(--accent-secondary);
  margin-bottom: var(--space-sm);
  transition: all var(--transition-base);
}

.card--solucao:hover .card__icon {
  background: rgba(124, 58, 237, 0.2);
  color: var(--accent-tertiary);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Card — Case */
.card--case {
  text-align: left;
}

.card__badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent-tertiary);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.card__meta {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.card__highlight {
  color: var(--accent-secondary);
  font-weight: 700;
}

/* ----- Sobre / Diferenciais ----- */
.sobre__diferenciais {
  margin-bottom: var(--space-2xl);
}

.sobre__item {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base);
}

.sobre__item:hover {
  border-color: var(--border-color-hover);
}

.sobre__item-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent-secondary);
}

.sobre__item-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.sobre__item-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ----- Timeline ----- */
.timeline {
  text-align: center;
}

.timeline__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.timeline__track {
  display: flex;
  gap: var(--space-md);
  position: relative;
}

.timeline__track::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
  opacity: 0.3;
  border-radius: 2px;
}

.timeline__step {
  flex: 1;
  position: relative;
  z-index: 1;
  padding: 0 var(--space-sm);
}

.timeline__step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  font-weight: 700;
  font-size: var(--text-xl);
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
}

.timeline__step-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline__step-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ----- CTA ----- */
.section--cta {
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.cta {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
}

.cta__title {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.cta__text {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.cta__actions {
  display: flex;
  justify-content: center;
}

/* ----- Form ----- */
.form {
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.form__title {
  font-size: var(--text-xl);
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--space-md);
}

.form__group {
  margin-bottom: var(--space-sm);
}

.form__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.form__input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

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

.form__input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.form__input--textarea {
  resize: vertical;
  min-height: 100px;
}

.form__submit {
  width: 100%;
  margin-top: var(--space-sm);
}

/* ----- Footer ----- */
.footer {
  background: var(--bg-secondary);
  border-top: var(--glass-border);
  padding-top: var(--space-xl);
}

.footer__container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.footer__logo {
  height: 32px;
  width: auto;
  margin-bottom: var(--space-sm);
}

.footer__desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 300px;
}

.footer__links-title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.footer__nav li + li {
  margin-top: 0.5rem;
}

.footer__nav a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer__nav a:hover {
  color: var(--accent-tertiary);
}

.footer__social-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__social-list a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer__social-list a:hover {
  color: var(--accent-tertiary);
}

.footer__bottom {
  border-top: var(--glass-border);
  padding: var(--space-md) 0;
  text-align: center;
}

.footer__bottom p {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer__bottom-meta {
  margin-top: 0.25rem;
  font-size: var(--text-xs);
}

/* ============================================
   Responsivo
   ============================================ */

/* Tablet */
@media (max-width: 900px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__container {
    grid-template-columns: 1fr 1fr;
  }

  .hero__title {
    font-size: var(--text-4xl);
  }

  .timeline__track {
    flex-wrap: wrap;
    justify-content: center;
  }

  .timeline__track::before {
    display: none;
  }

  .timeline__step {
    flex: 0 0 calc(50% - var(--space-md));
    margin-bottom: var(--space-md);
  }
}

/* Mobile */
@media (max-width: 768px) {
  .header__hamburger {
    display: flex;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(85vw, 360px);
    height: 100dvh;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: 5rem var(--space-lg) var(--space-lg);
    background: rgba(29, 35, 40, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: var(--glass-border);
    transition: right var(--transition-base);
    gap: var(--space-lg);
    z-index: 105;
  }

  .header__nav--open {
    right: 0;
  }

  .header__nav-list {
    flex-direction: column;
    gap: var(--space-sm);
    align-items: stretch;
  }

  .header__nav-link {
    display: block;
    padding: var(--space-sm);
    font-size: var(--text-lg);
    border-radius: var(--radius-sm);
  }

  .header__nav-link:hover {
    background: rgba(124, 58, 237, 0.08);
  }

  .header__cta {
    justify-content: center;
  }

  .hero {
    min-height: 70vh;
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__subtitle {
    font-size: var(--text-base);
  }

  .grid--2,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .sobre__item {
    flex-direction: column;
  }

  .footer__container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__desc {
    max-width: 100%;
  }

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

  .card {
    padding: var(--space-md);
  }
}

/* Mobile pequeno */
@media (max-width: 480px) {
  .hero__title {
    font-size: var(--text-2xl);
  }

  .section__title {
    font-size: var(--text-2xl);
  }

  .cta__title {
    font-size: var(--text-2xl);
  }

  .btn--lg {
    padding: 0.85rem 1.5rem;
    font-size: var(--text-sm);
  }
}