/* ==========================================================================
   Design System & Variables
   ========================================================================== */
:root {
  /* Colors - Water Blue & Environment Green Theme */
  --primary-color: #1E40AF;
  /* Deep Water Blue */
  --secondary-color: #047857;
  /* Emerald Green */
  --accent-color: #D97706;
  /* Amber */

  --bg-white: #ffffff;
  --bg-light: #F0FDF4;
  /* Very Light Greenish/Mint */
  --text-dark: #111827;
  --text-light: #ffffff;
  --text-muted: #4B5563;

  /* Fonts */
  --font-family: 'Poppins', sans-serif;
  --font-title: 'Arima', serif;

  /* Layout */
  --max-width: 1000px;
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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;
}

.section-title {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 40px;
  text-align: center;
  position: relative;
  text-transform: uppercase;
  color: var(--primary-color);
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--secondary-color);
  margin: 15px auto 0 auto;
  border-radius: 2px;
}

/* ==========================================================================
   Header Area (Hero)
   ========================================================================== */
.header-area {
  background: linear-gradient(135deg, rgba(239, 246, 255, 0.85) 0%, rgba(219, 234, 254, 0.85) 100%), url("../img/ii-congresso-saneamento-background1.webp");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  padding: 60px 0;
  text-align: center;
  border-bottom: 4px solid var(--primary-color);
}

.header-logo {
  max-width: 650px;
  width: 100%;
  margin: 0 auto;
}

/* ==========================================================================
   Sticky Navigation Bar
   ========================================================================== */
.nav-bar {
  background-color: var(--primary-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 60px;
}

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

.nav-links a {
  color: var(--text-light);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  padding: 10px 15px;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 15px;
  right: 15px;
  height: 2.5px;
  background-color: var(--secondary-color);
  transform: scaleX(0);
  transition: var(--transition);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

/* ==========================================================================
   Section: Apresentação (Sobre)
   ========================================================================== */
.apresentacao-section {
  background-color: var(--bg-white);
}

.apresentacao-wrapper {
  max-width: 850px;
  margin: 0 auto;
}

.apresentacao-text {
  font-size: 1.1rem;
  color: #374151;
  text-align: justify;
  margin-bottom: 40px;
}

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

/* Bloco de Serviço (Perguntas e Respostas) */
.servico-box {
  background: linear-gradient(135deg, rgba(240, 253, 244, 0.7) 0%, rgba(239, 246, 255, 0.85) 100%);
  border: 1px solid rgba(30, 64, 175, 0.15);
  border-radius: var(--border-radius);
  padding: 35px 30px;
  margin-top: 10px;
  margin-bottom: 35px;
  box-shadow: 0 4px 20px rgba(30, 64, 175, 0.05);
  position: relative;
  overflow: hidden;
}

.servico-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.servico-header {
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  border-bottom: 1px solid rgba(30, 64, 175, 0.1);
  padding-bottom: 15px;
}

.servico-title {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  margin: 0;
  letter-spacing: 0.5px;
}

.servico-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(4, 120, 87, 0.1);
  color: var(--secondary-color);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid rgba(4, 120, 87, 0.2);
}

.servico-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.servico-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background-color: var(--bg-white);
  padding: 18px 22px;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--secondary-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.servico-item:hover {
  transform: translateX(5px);
  box-shadow: 0 6px 16px rgba(30, 64, 175, 0.08);
  border-left-color: var(--primary-color);
}

.servico-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background-color: rgba(30, 64, 175, 0.08);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.servico-item:hover .servico-icon {
  background-color: var(--primary-color);
  color: var(--text-light);
}

.servico-info {
  flex: 1;
}

.servico-question {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 4px;
}

.servico-answer {
  font-size: 1rem;
  color: var(--text-dark);
  margin: 0;
  line-height: 1.5;
}

.servico-detail {
  display: block;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: normal;
}

.servico-detail i {
  color: var(--secondary-color);
  margin-right: 6px;
}

.cta-box {
  background-color: var(--bg-light);
  border: 1px solid rgba(4, 120, 87, 0.1);
  padding: 30px;
  border-radius: var(--border-radius);
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  row-gap: 10px;
}

.cta-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 15px;
}

.btn-inscreva {
  display: inline-block;
  background-color: var(--primary-color);
  color: var(--text-light);
  font-weight: 700;
  padding: 12px 30px;
  border-radius: 30px;
  box-shadow: 0 4px 15px rgba(30, 64, 175, 0.2);
  transition: var(--transition);
}

.btn-inscreva:hover {
  background-color: var(--secondary-color);
  color: var(--text-light);
  transform: translateY(-1px);
}

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

.programacao-adendo {
  background-color: var(--bg-white);
  border: 1px solid rgba(30, 64, 175, 0.1);
  border-left: 4px solid var(--secondary-color);
  border-radius: var(--border-radius);
  padding: 24px 28px;
  margin-bottom: 35px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  text-align: left;
}

.adendo-theme {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 14px;
  line-height: 1.4;
}

.adendo-info-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.adendo-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-dark);
  line-height: 1.5;
}

.adendo-info-item i {
  color: var(--secondary-color);
  font-size: 1rem;
  margin-top: 4px;
  min-width: 18px;
  text-align: center;
}

.adendo-info-item strong {
  color: var(--primary-color);
}

.prog-day-block {
  margin-bottom: 40px;
}

.prog-day-block:last-child {
  margin-bottom: 0;
}

.prog-day-title {
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: 14px 25px;
  font-size: 1.25rem;
  font-weight: 700;
  text-align: left;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  letter-spacing: 0.3px;
}

.prog-day-content {
  background-color: var(--bg-white);
  border: 1px solid rgba(30, 64, 175, 0.08);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  padding: 30px 25px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.02);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 22px;
  text-align: left;
}

.timeline-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding-bottom: 22px;
  border-bottom: 1px solid #F3F4F6;
}

.timeline-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.timeline-time {
  font-weight: 700;
  color: var(--primary-color);
  min-width: 135px;
  white-space: nowrap;
  font-size: 0.95rem;
  background: rgba(30, 64, 175, 0.06);
  padding: 6px 12px;
  border-radius: 6px;
  text-align: center;
  align-self: flex-start;
}

.timeline-details {
  flex: 1;
}

.event-type-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 2px 8px;
  border-radius: 4px;
  background-color: rgba(4, 120, 87, 0.12);
  color: var(--secondary-color);
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.4;
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--secondary-color);
  font-style: italic;
  margin-top: 4px;
  margin-bottom: 12px;
  line-height: 1.45;
}

.panel-participants {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel-block {
  padding: 8px 14px;
  background-color: #F9FAFB;
  border-left: 3px solid var(--accent-color);
  border-radius: 0 6px 6px 0;
  margin-top: 0;
}

.timeline-speaker {
  font-size: 0.93rem;
  color: var(--text-dark);
  line-height: 1.45;
  margin-top: 0;
}

.speaker-role {
  color: var(--secondary-color);
  font-weight: 700;
}

.participant-theme {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

/* ==========================================================================
   Section: Hospedagem
   ========================================================================== */
.hospedagem-section {
  background: linear-gradient(rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.85)), url("../img/iii-congresso-saneamento-background2.webp");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.hospedagem-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.hotels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.hotel-card {
  background-color: var(--bg-light);
  border: 1px solid rgba(4, 120, 87, 0.05);
  border-radius: var(--border-radius);
  padding: 25px;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.hotel-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
  border-color: var(--primary-color);
}

.hotel-details {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.hotel-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 4px;
}

.hotel-address,
.hotel-metro {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.45;
}

.hotel-address i,
.hotel-metro i {
  color: var(--secondary-color);
  margin-top: 3px;
  min-width: 16px;
  text-align: center;
}

.btn-hotel-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary-color);
  margin-top: auto;
  align-self: flex-start;
}

.btn-hotel-link:hover {
  color: var(--secondary-color);
}

/* ==========================================================================
   Section: Realização
   ========================================================================== */
.realizacao-section {
  background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
  border-top: 1px solid rgba(30, 64, 175, 0.05);
}

.org-block {
  margin-bottom: 0;
}

.org-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 30px;
  letter-spacing: 0.5px;
}

.logo-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  background: transparent;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  cursor: pointer;
  text-decoration: none;
}

.logo-link:hover {
  transform: translateY(-5px) scale(1.03);
}

.org-logo {
  max-height: 75px;
  max-width: 250px;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.logo-link:hover .org-logo {
  filter: brightness(1.05);
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
.footer-area {
  background-color: var(--primary-color);
  padding: 30px 0;
  border-top: 4px solid var(--secondary-color);
}

.footer-text {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* ==========================================================================
   Media Queries (Responsive)
   ========================================================================== */
@media (max-width: 900px) {
  .header-logo {
    max-width: 380px;
  }

  .timeline-item {
    flex-direction: column;
    gap: 8px;
  }

  .timeline-time {
    min-width: auto;
  }
}

@media (max-width: 600px) {
  .nav-links {
    gap: 15px;
  }

  .nav-links a {
    font-size: 0.85rem;
    padding: 8px 10px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .section-padding {
    padding: 60px 0;
  }

  .servico-box {
    padding: 24px 18px;
  }

  .servico-item {
    padding: 14px 16px;
    gap: 12px;
  }

  .servico-icon {
    width: 38px;
    height: 38px;
    min-width: 38px;
    font-size: 1rem;
  }
}

/* ==========================================================================
   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);
  }
}