/* ==========================================================================
   Design System & Variables
   ========================================================================== */
:root {
  /* Colors */
  --primary-color: #001B81;
  --secondary-color: #006DB3;
  --accent-color: #96D578;
  --accent-hover: #7bbf5d;
  
  --bg-gradient: linear-gradient(180deg, #001B81 0%, #006DB3 100%);
  --bg-light: #ffffff;
  --bg-gray: #f9f9f9;
  
  --text-dark: #333333;
  --text-light: #ffffff;
  --text-muted: #e0e0e0;
  
  /* Fonts */
  --font-family: 'Poppins', sans-serif;
  
  /* Layout */
  --max-width: 1000px;
  --border-radius: 8px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
  --box-shadow-hover: 0 10px 20px rgba(0, 0, 0, 0.15), 0 6px 6px rgba(0, 0, 0, 0.1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-light);
  background-color: var(--primary-color);
  line-height: 1.6;
  font-size: 16px;
}

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

a:hover {
  color: var(--text-light);
}

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

/* ==========================================================================
   Reusable Utilities
   ========================================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section-padding {
  padding: 80px 0;
}

.text-center {
  text-align: center;
}

.btn {
  display: inline-block;
  padding: 12px 35px;
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  border-radius: 6px;
  border: 2px solid var(--accent-color);
  background-color: var(--accent-color);
  color: var(--primary-color);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  box-shadow: var(--box-shadow);
}

.btn:hover {
  background-color: transparent;
  color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(150, 213, 120, 0.3);
}

/* Section Title & Divider */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-light);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-divider {
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
  margin: 0 auto 40px auto;
  border-radius: 2px;
}

/* ==========================================================================
   Header Banner
   ========================================================================== */
.header-banner img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   Sticky Navigation Menu
   ========================================================================== */
.sticky-nav {
  position: sticky;
  top: 0;
  background-color: var(--accent-color);
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 10px 0;
  transition: var(--transition);
}

.nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 30px;
}

.nav-menu a {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 4px;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background-color: var(--primary-color);
  color: var(--text-light);
}

/* ==========================================================================
   Section: Apresentação & Carta dos presidentes
   ========================================================================== */
.apresentacao-section {
  background: var(--bg-gradient);
}

.intro-text-block {
  text-align: justify;
  margin-bottom: 40px;
  font-size: 1.05rem;
}

.intro-text-block p {
  margin-bottom: 20px;
}

.letter-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 40px 0 20px 0;
  text-transform: uppercase;
  border-left: 4px solid var(--accent-color);
  padding-left: 15px;
  text-align: left;
}

.participation-note {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 40px 0 30px 0;
}

/* ==========================================================================
   Presidents / Coordinators Profile Grid
   ========================================================================== */
.profiles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 50px;
}

.profile-card {
  background-color: rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.profile-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-hover);
  border-color: var(--accent-color);
}

.profile-img-wrapper img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.profile-info {
  padding: 15px;
  flex-grow: 1;
}

.profile-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 5px;
}

.profile-role {
  font-size: 0.85rem;
  color: var(--accent-color);
  font-style: italic;
}

/* ==========================================================================
   Section: Programação
   ========================================================================== */
.programacao-section {
  background: var(--bg-gradient);
}

.program-day-wrapper {
  margin-bottom: 60px;
}

.program-day-header {
  background-color: var(--accent-color);
  color: var(--primary-color);
  font-size: 1.25rem;
  font-weight: 800;
  padding: 12px 25px;
  border-radius: var(--border-radius);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 25px;
  display: inline-block;
}

.program-timeline {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.program-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 25px;
  background-color: rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius);
  padding: 20px 25px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  text-align: left;
  transition: var(--transition);
}

.program-item:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.15);
}

.program-time {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-color);
  text-decoration: underline;
}

.program-details h5 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 5px;
  text-decoration: underline;
}

.program-topic-title {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 8px;
}

.program-lecturer {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.program-lecturer strong {
  color: var(--accent-color);
}

/* Sub-speakers list (for opening / round table) */
.program-sub-list {
  list-style: none;
  padding-left: 15px;
  border-left: 2px solid var(--accent-color);
  margin-top: 10px;
}

.program-sub-list li {
  font-size: 0.95rem;
  position: relative;
  margin-bottom: 5px;
}

/* Nested schedule inside program block (e.g. 08/08 at 11h) */
.program-nested {
  margin-top: 15px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nested-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 15px;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 12px;
}

.nested-time {
  font-weight: 700;
  color: var(--accent-color);
}

/* ==========================================================================
   Section: Contato
   ========================================================================== */
.contato-section {
  background-color: var(--secondary-color);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.contato-list {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 25px;
  flex-wrap: wrap;
}

.contato-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
}

.contato-list li i {
  font-size: 1.4rem;
  color: var(--accent-color);
}

/* ==========================================================================
   Footer Partners & Logos
   ========================================================================== */
.footer-logos {
  background-color: var(--bg-light);
  color: var(--primary-color);
  padding: 60px 0;
}

.logos-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
}

.logos-group {
  display: flex;
  flex-direction: column;
  gap: 15px;
  align-items: flex-start;
}

.logos-group-title {
  font-weight: 800;
  color: var(--primary-color);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.logos-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 25px;
}

.logos-grid a img {
  height: 55px;
  width: auto;
  object-fit: contain;
  transition: var(--transition);
}

.logos-grid a img:hover {
  transform: scale(1.05);
}

/* Custom logo sizes */
.logos-grid a[href*="irbcontas"] img {
  height: 52px;
}

.logos-grid a[href*="gov.br/ana"] img {
  height: 65px;
}

.logos-grid a[href*="atricon"] img {
  height: 55px;
}

.copyright-bar {
  background-color: var(--bg-gray);
  color: var(--primary-color);
  padding: 20px 0;
  font-size: 0.95rem;
  font-weight: 600;
  border-top: 1px solid rgba(0,0,0,0.05);
}

/* ==========================================================================
   Media Queries (Responsive)
   ========================================================================== */
@media (max-width: 900px) {
  .profiles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }
  
  .logos-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .logos-group {
    align-items: center;
  }
  
  .logos-grid {
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .section-padding {
    padding: 60px 0;
  }
  
  .nav-menu {
    gap: 15px;
  }
  
  .nav-menu a {
    font-size: 0.9rem;
    padding: 6px 10px;
  }
  
  .profiles-grid {
    grid-template-columns: 1fr;
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .program-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .nested-item {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}
/* ==========================================================================
   Menu Hambúrguer Responsivo (Mobile)
   ========================================================================== */
.nav-toggle {
  display: none;
}

@media (max-width: 768px) {
  .nav-container {
    position: relative;
    display: flex;
    justify-content: space-between !important;
    align-items: center;
    width: 100%;
    padding: 0 20px;
  }

  /* Esconde o menu desktop e o posiciona em absoluto */
  .nav-links, .nav-menu {
    display: none !important;
    flex-direction: column;
    position: absolute !important;
    top: 100% !important; /* Posiciona logo abaixo da barra de navegação */
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    margin: 0 !important;
    transform: none !important;
    padding: 20px 0 !important;
    gap: 10px !important;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    z-index: 999 !important;
  }

  .nav-links.open, .nav-menu.open {
    display: flex !important;
  }

  .nav-links li, .nav-menu li {
    width: 100% !important;
    text-align: center !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .nav-links a, .nav-menu a {
    display: block !important;
    padding: 12px 20px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Hamburger Menu Toggle Button */
  .nav-toggle {
    display: flex !important;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    margin-left: auto; /* Alinha o botão à direita */
  }

  .nav-toggle .hamburger-bar {
    width: 100%;
    height: 3px;
    background-color: currentColor;
    border-radius: 2px;
    transition: all 0.3s ease;
  }

  /* Transição do Hambúrguer para 'X' */
  .nav-toggle.active .hamburger-bar:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
  }

  .nav-toggle.active .hamburger-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .hamburger-bar:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
  }
}