/* Importação da fonte */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

/* ===============================================
1. SISTEMA DE DESIGN (ESPECIFICAÇÃO)
===============================================
*/
:root{
  /* 1.1 Paleta de Cores (8+ cores) */
  --primary: #0b6fa4;
  --primary-dark: #085a87;
  --secondary: #6c757d; /* Nova cor */
  --success: #198754; /* Nova cor */
  --danger: #dc3545; /* Nova cor */
  --warning: #ffc107; /* Nova cor */
  
  --text: #212529;
  --text-muted: #6c757d;
  --bg: #ffffff;
  --surface: #f8f9fa;
  --border-color: #dee2e6;
  
  /* 1.2 Tipografia (Hierarquia com 5+ tamanhos) */
  --font-size-base: 1rem; /* 16px */
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem; /* Novo */
  --font-size-h5: 1.1rem; /* Novo */
  --font-size-sm: 0.875rem; /* Novo */
  --font-size-lg: 1.15rem; /* Novo */
  
  /* 1.3 Sistema de Espaçamento Modular (Base 8px) */
  --space-1: 0.5rem;  /* 8px */
  --space-2: 1rem;    /* 16px */
  --space-3: 1.5rem;  /* 24px */
  --space-4: 2rem;    /* 32px */
  --space-5: 2.5rem;  /* 40px - Adicionado para flexibilidade */
  --space-6: 3rem;    /* 48px */
  --space-8: 4rem;    /* 64px */

  /* Outras variáveis globais */
  --radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 10px rgba(0,0,0,0.08);
  --container: min(1140px, 94%);
  --transition-fast: all 0.2s ease-in-out;
}

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

html, body{
  height: 100%;
}

body{
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: var(--font-size-base);
}

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2);
}

/* Tipografia (Implementação da Hierarquia) */
h1, h2, h3, h4, h5 {
  margin: 0 0 var(--space-2);
  font-weight: 700;
  line-height: 1.2;
}
h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }
h5 { font-size: var(--font-size-h5); }

p { margin: 0 0 var(--space-2); }
p:last-child { margin-bottom: 0; }
ul, ol { margin-bottom: var(--space-2); padding-left: var(--space-3); }
a { color: var(--primary); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--primary-dark); text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
small, .text-sm { font-size: var(--font-size-sm); }

/* Skip link */
.skip-link{
  position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden;
  z-index: 9999;
}
.skip-link:focus{
  position: fixed;
  top: 10px;
  left: 10px;
  width: auto;
  height: auto;
  padding: 0.75rem 1rem;
  background: #000;
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

/* ===============================================
2. LEIAUTES RESPONSIVOS (ESPECIFICAÇÃO)
===============================================
*/

/* 2.1 Grid 12 Colunas (Sistema Customizado) */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-3);
}
.col-span-full { grid-column: 1 / -1; }
.col-span-1 { grid-column: span 1; }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }
.col-span-9 { grid-column: span 9; }
.col-span-10 { grid-column: span 10; }
.col-span-11 { grid-column: span 11; }
.col-span-12 { grid-column: span 12; }

/* ===============================================
3. NAVEGAÇÃO SOFISTICADA (ESPECIFICAÇÃO)
===============================================
*/
.site-header{
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.site-header .container{
  display: flex;
  gap: var(--space-2);
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.logo{
  height: 48px;
  width: auto;
  z-index: 10; /* Para ficar acima da nav mobile */
}
.logo-link:focus { outline: none; }
.logo-link:focus .logo {
  outline: 3px solid #ffd54f;
  outline-offset: 2px;
  border-radius: 4px;
}

/* 3.1 Menu Hambúrguer (Toggle Button) */
.nav-toggle {
  display: none; /* Oculto por padrão (desktop) */
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  z-index: 10;
}
.hamburger-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: background 0.15s ease-out;
}
.hamburger-icon::before,
.hamburger-icon::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  position: absolute;
  left: 0;
  transition: transform 0.15s ease-out;
}
.hamburger-icon::before { top: -7px; }
.hamburger-icon::after { bottom: -7px; }

/* Estado "Aberto" do Hambúrguer */
.nav-toggle[aria-expanded="true"] .hamburger-icon {
  background: transparent; /* Some o miolo */
}
.nav-toggle[aria-expanded="true"] .hamburger-icon::before {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger-icon::after {
  transform: translateY(-7px) rotate(-45deg);
}

/* 3.2 Lista de Navegação */
.nav-list{
  list-style: none;
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  align-items: center;
}
.nav-list a{
  display: inline-block;
  padding: 0.5rem 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  border-radius: var(--radius);
  position: relative;
}
.nav-list a:hover {
  background-color: var(--surface);
  color: var(--primary-dark);
  text-decoration: none;
}
.nav-list a[aria-current="page"]{
  color: var(--primary);
  font-weight: 700;
}
.nav-list a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 3px;
  background-color: var(--primary);
  border-radius: 2px;
}

/* 3.3 Submenu Dropdown */
.dropdown {
  position: relative;
}
.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--bg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius);
  padding: var(--space-1);
  z-index: 101;
  list-style: none;
}
.submenu a {
  display: block;
  width: 100%;
  font-weight: 400;
}
.submenu a::after { /* Remove a linha do aria-current */
  display: none;
}
/* Lógica para mostrar o dropdown */
.dropdown:hover > .submenu,
.dropdown:focus-within > .submenu {
  display: block;
}


/* ===============================================
4. COMPONENTES DE INTERFACE (ESPECIFICAÇÃO)
===============================================
*/

/* 4.1 Botões (com estados :active e :disabled) */
.btn{
  display: inline-block;
  padding: .6rem 1.2rem;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  border: 1px solid var(--primary);
  cursor: pointer;
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.btn:hover{
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
}
.btn.outline{
  background: transparent;
  color: var(--primary);
}
.btn.outline:hover{
  background: var(--primary);
  color: #fff;
}
/* NOVO: Estados :active e :disabled */
.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn:disabled, .btn.disabled {
  background: var(--secondary);
  border-color: var(--secondary);
  color: #fff;
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* 4.2 Formulários (com validação visual) */
form {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
fieldset{
  border: 1px solid var(--border-color);
  padding: var(--space-3);
  margin: 0;
  border-radius: var(--radius);
  background: var(--surface);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}
legend{
  font-weight: 700;
  font-size: var(--font-size-h4);
  padding: 0 0.5rem;
  margin-left: -0.5rem;
}
label{
  display: block;
  font-weight: 600;
  margin-bottom: .25rem;
}
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}
label.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 400;
  margin: 0;
}
label.checkbox-label input[type="checkbox"] {
  width: auto;
  margin: 0;
}
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="search"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: .75rem;
  border: 1px solid #ced4da;
  border-radius: 6px;
  font-size: var(--font-size-base);
  font-family: inherit;
  background: var(--bg);
  transition: var(--transition-fast);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11, 111, 164, 0.2);
}
/* NOVO: Validação Visual */
input:invalid:focus,
textarea:invalid:focus {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.2);
}
.form-actions{
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}
.obs{
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* 4.3 Componentes de Feedback (Alerts) */
.alert {
  padding: var(--space-2);
  margin-bottom: var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 500;
}
.alert-info {
  color: #055160;
  background-color: #cff4fc;
  border-color: #b6effb;
}
.alert-success {
  color: var(--success);
  background-color: #d1e7dd;
  border-color: #badbcc;
}
.alert-danger {
  color: var(--danger);
  background-color: #f8d7da;
  border-color: #f5c2c7;
}
.alert-warning {
  color: #664d03;
  background-color: #fff3cd;
  border-color: #ffecb5;
}

/* 4.4 Componentes de Feedback (Modals) */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-2);
}
.modal {
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border-color);
}
.modal-header h2 {
  margin: 0;
  font-size: var(--font-size-h4);
}
.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  opacity: 0.5;
  cursor: pointer;
}
.modal-close-btn:hover {
  opacity: 1;
}
.modal-body {
  padding: var(--space-3);
  overflow-y: auto;
}
.modal-footer {
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-1);
}

/* 4.5 Badges e Tags */
.badge {
  display: inline-block;
  padding: 0.35em 0.65em;
  font-size: var(--font-size-sm);
  font-weight: 700;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 0.375rem;
}
.badge-primary {
  color: #fff;
  background-color: var(--primary);
}
.badge-secondary {
  color: #fff;
  background-color: var(--secondary);
}
.badge-success {
  color: #fff;
  background-color: var(--success);
}
.badge-danger {
  color: #fff;
  background-color: var(--danger);
}


/* Outros Estilos (Hero, Projetos, Footer) */

/* Hero (Página Inicial) */
.hero{
  padding: var(--space-3) 0;
}
.hero img{
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin-top: var(--space-3);
  box-shadow: var(--shadow-md);
  object-fit: cover;
  max-height: 400px;
}
.hero-texto p {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
}
.hero-botoes {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: var(--space-3);
}

/* Página de Projetos */
.lista-projetos{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
.projeto{
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  transition: var(--transition-fast);
}
.projeto:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}
.projeto img{
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}
.projeto-texto {
  padding: var(--space-3);
  flex-grow: 1;
}
.projeto-texto h2 { font-size: var(--font-size-h4); }
.projeto-texto p { margin-bottom: var(--space-1); }
.projeto-links {
  padding: 0 var(--space-3) var(--space-3);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Filtros (Aside) */
.filtros {
  background: var(--surface);
  padding: var(--space-3);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}
.filtros h3 {
  margin-bottom: var(--space-3);
}
.filtros form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.filtros button {
  width: 100%;
}


/* Footer */
.site-footer{
  border-top: 1px solid var(--border-color);
  padding: var(--space-6) 0;
  margin-top: var(--space-6);
  background: var(--text);
  color: #f1f1f1;
}
.site-footer .container{
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
}
.site-footer a{
  color: #fff;
  text-decoration: underline;
}
.site-footer a:hover {
  text-decoration: none;
}
.site-footer address {
  font-style: normal;
  line-height: 1.7;
}
.social-list{
  list-style: none;
  padding: 0;
  display: flex;
  gap: var(--space-2);
  font-size: 1.1rem;
}
.social-list a {
  text-decoration: none;
  font-weight: 600;
}
.copyright{
  width: 100%;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-4);
  border-top: 1px solid #444;
  padding-top: var(--space-3);
}

/* Acessibilidade: Estados de foco visíveis */
a:focus, 
button:focus, 
input:focus, 
select:focus, 
textarea:focus,
.skip-link:focus,
.nav-toggle:focus {
  outline: 3px solid #ffd54f; /* Amarelo bem visível */
  outline-offset: 2px;
  box-shadow: none; /* Desliga outras sombras no foco */
}
:focus {
  outline: none; 
}

/* ===============================================
5. BREAKPOINTS RESPONSIVOS (ESPECIFICAÇÃO)
5 Breakpoints
===============================================
*/

/* Breakpoint 1: Small Mobile */
@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  
  .form-actions {
    flex-direction: column;
  }
  .form-actions .btn {
    width: 100%;
  }
}

/* Breakpoint 2: Tablet Portrait */
@media (min-width: 700px){
  .container{
    padding: var(--space-3);
  }
  
  /* Grid de projetos (tablet) */
  .lista-projetos{
    grid-template-columns: 1fr 1fr;
  }

  /* Layout do formulário (tablet) */
  #cadastroForm fieldset {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }
  .full-width {
    grid-column: 1 / -1;
  }
  .checkbox-group {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-3);
  }
}

/* Breakpoint 3: Tablet Landscape */
@media (min-width: 768px){
  /* Hero (tablet/desktop) */
  .hero{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
    align-items: center;
    padding: var(--space-6) 0;
  }
  .hero img {
    margin-top: 0;
    max-height: none;
  }
  .hero h1 { font-size: 3rem; }
  
  /* Colunas responsivas do Grid-12 */
  .col-md-span-4 { grid-column: span 4; }
  .col-md-span-6 { grid-column: span 6; }
  .col-md-span-8 { grid-column: span 8; }
}

/* Breakpoint 4: Desktop (Mudança do Menu) */
@media (max-width: 991.98px) {
  .nav-toggle {
    display: block;
  }
  .nav-list {
    display: none; /* Oculto por padrão no mobile */
    position: absolute;
    top: 73px; /* Altura do header */
    left: 0;
    right: 0;
    width: 100%;
    background: var(--bg);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-2);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }
  .nav-list.is-open {
    display: flex; /* Mostra o menu com JS */
  }
  .nav-list li {
    width: 100%;
  }
  .nav-list a {
    display: block;
    width: 100%;
  }
  /* Dropdown no mobile */
  .dropdown {
    width: 100%;
  }
  .dropdown > a {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .dropdown > a::after { /* Seta simples */
    content: '▼';
    font-size: 0.6rem;
  }
  .submenu {
    position: static;
    display: block;
    width: 100%;
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-2);
    background: var(--surface);
  }
  .dropdown:hover > .submenu {
    display: block; /* Garante que fique visível */
  }
}

/* Breakpoint 5: Large Desktop */
@media (min-width: 1200px) {
  /* Layout da Página de Projetos (Desktop) */
  .layout-projetos {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-5);
  }
  .projetos-conteudo {
    grid-column: 1 / 2;
  }
  .filtros {
    grid-column: 2 / 3;
    align-self: start; /* Para de esticar */
    position: sticky;
    top: 100px; /* 73px do header + 27px de espaço */
  }
  
  /* Colunas responsivas do Grid-12 */
  .col-lg-span-4 { grid-column: span 4; }
  .col-lg-span-6 { grid-column: span 6; }
  .col-lg-span-8 { grid-column: span 8; }
}