/* ========================================
   SitePoliticaBrasil — Design System
   Cores: verde #1a6b3c + amarelo #f5c518
   ======================================== */

:root {
  --verde: #1a6b3c;
  --verde-escuro: #145230;
  --verde-claro: #e8f5ee;
  --amarelo: #f5c518;
  --amarelo-escuro: #d4a800;
  --branco: #ffffff;
  --cinza-100: #f7f8fa;
  --cinza-200: #e9ecef;
  --cinza-300: #ced4da;
  --cinza-600: #6c757d;
  --cinza-800: #343a40;
  --texto: #212529;
  --tooltip-bg: #1a1a2e;
  --tooltip-texto: #ffffff;
  --sombra: 0 4px 16px rgba(0, 0, 0, 0.08);
  --sombra-hover: 0 8px 24px rgba(0, 0, 0, 0.14);
  --raio: 12px;
  --raio-peq: 8px;
  --fonte: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--fonte);
  color: var(--texto);
  background: var(--cinza-100);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--verde);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   NAVEGAÇÃO SUPERIOR (links entre subsistemas)
   ======================================== */

.topnav {
  background: var(--verde-escuro);
  border-bottom: 2px solid var(--amarelo);
}

.topnav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  flex-wrap: wrap;
}

.topnav .topnav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.topnav a {
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.topnav a:hover {
  color: var(--amarelo);
  border-bottom-color: var(--amarelo);
  text-decoration: none;
}

.topnav a.topnav-home {
  color: var(--amarelo);
  font-weight: 800;
}

/* ========================================
   HEADER / NAV
   ======================================== */

.site-header {
  background: var(--verde);
  color: var(--branco);
  box-shadow: var(--sombra);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--branco);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo:hover {
  text-decoration: none;
  color: var(--amarelo);
}

.logo .logo-destaque {
  color: var(--amarelo);
}

.nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav a {
  color: var(--branco);
  padding: 8px 14px;
  border-radius: var(--raio-peq);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, color 0.2s;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.15);
  text-decoration: none;
  color: var(--amarelo);
}

.nav a.ativo {
  background: var(--amarelo);
  color: var(--verde-escuro);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--branco);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
}

/* ========================================
   HERO (landing)
   ======================================== */

.hero {
  background: linear-gradient(135deg, var(--verde) 0%, var(--verde-escuro) 100%);
  color: var(--branco);
  padding: 72px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero h1 .destaque {
  color: var(--amarelo);
}

.hero p {
  font-size: 1.2rem;
  max-width: 640px;
  margin: 0 auto 32px;
  opacity: 0.95;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========================================
   BOTÕES
   ======================================== */

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--raio-peq);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-amarelo {
  background: var(--amarelo);
  color: var(--verde-escuro);
  box-shadow: 0 4px 14px rgba(245, 197, 24, 0.35);
}

.btn-amarelo:hover {
  background: var(--amarelo-escuro);
  box-shadow: 0 6px 18px rgba(245, 197, 24, 0.45);
}

.btn-branco {
  background: var(--branco);
  color: var(--verde);
  box-shadow: var(--sombra);
}

.btn-branco:hover {
  background: var(--cinza-100);
}

.btn-outline {
  background: transparent;
  color: var(--branco);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  border-color: var(--branco);
  background: rgba(255, 255, 255, 0.1);
}

/* ========================================
   SEÇÕES / CARDS
   ======================================== */

.section {
  padding: 56px 0;
}

.section-titulo {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--verde-escuro);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--cinza-600);
  margin-bottom: 32px;
  max-width: 640px;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.card {
  background: var(--branco);
  border-radius: var(--raio);
  box-shadow: var(--sombra);
  padding: 28px;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sombra-hover);
}

.card-icone {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.25rem;
  color: var(--verde-escuro);
  margin-bottom: 8px;
}

.card p {
  color: var(--cinza-600);
  flex: 1;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 700;
  color: var(--verde);
}

.card-link:hover {
  color: var(--amarelo-escuro);
}

/* Card destaque (NossoImposto) */
.card-destaque {
  border: 2px solid var(--amarelo);
  background: linear-gradient(180deg, var(--branco) 0%, #fffbe6 100%);
}

/* ========================================
   PÁGINAS DE CONTEÚDO
   ======================================== */

.page-header {
  background: var(--verde);
  color: var(--branco);
  padding: 48px 0;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-header p {
  opacity: 0.95;
  margin-top: 8px;
  max-width: 640px;
}

.page-body {
  padding: 48px 0;
}

/* ========================================
   VÍDEOS
   ======================================== */

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--branco);
  border-radius: var(--raio);
  box-shadow: var(--sombra);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sombra-hover);
}

.video-thumb {
  aspect-ratio: 16 / 9;
  background: var(--verde-escuro);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amarelo);
  font-size: 3rem;
}

.video-thumb iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.video-info {
  padding: 18px;
}

.video-info h3 {
  font-size: 1.05rem;
  color: var(--verde-escuro);
  margin-bottom: 6px;
}

.video-info p {
  color: var(--cinza-600);
  font-size: 0.92rem;
}

.video-tag {
  display: inline-block;
  background: var(--verde-claro);
  color: var(--verde);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 10px;
}

/* Filtro de vídeos */
.filtro-videos {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.filtro-btn {
  background: var(--branco);
  border: 1px solid var(--cinza-300);
  color: var(--cinza-800);
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.filtro-btn:hover {
  border-color: var(--verde);
  color: var(--verde);
}

.filtro-btn.ativo {
  background: var(--verde);
  border-color: var(--verde);
  color: var(--branco);
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  background: var(--verde-escuro);
  color: rgba(255, 255, 255, 0.85);
  padding: 32px 0;
  margin-top: 48px;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

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

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

/* ========================================
   TOOLTIP FLUTUANTE
   ======================================== */

.tooltip-flutuante {
  position: fixed;
  background: var(--tooltip-bg);
  color: var(--tooltip-texto);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
  max-width: 320px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.tooltip-flutuante.visible {
  opacity: 1;
}

/* ========================================
   RESPONSIVO
   ======================================== */

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--verde);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    box-shadow: var(--sombra);
  }

  .nav.aberta {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero {
    padding: 48px 0;
  }

  .section-titulo {
    font-size: 1.5rem;
  }
}