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

:root {
  /* Tema Claro (padrão) */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-nav: #111827;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-nav: #ffffff;
  --accent-red: #DC2626;
  --accent-blue: #2563EB;
  --border-color: #E5E7EB;
  --card-bg: #E5E7EB;
  --shadow: rgba(0, 0, 0, 0.1);
  --gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
}

[data-theme="dark"] {
  /* Tema Escuro (baseado na imagem) */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-nav: #0a0a1a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-nav: #ffffff;
  --accent-red: #ff4757;
  --accent-blue: #3742fa;
  --border-color: #2d2d44;
  --card-bg: #1e1e3a;
  --shadow: rgba(0, 0, 0, 0.3);
  --gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 25%, #0f3460 50%, #533483 75%, #e94560 100%);
}

body {
  font-family: 'Montserrat', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  color: var(--text-primary);
  background: var(--gradient);
  min-height: 100vh;
  transition: all 0.3s ease;
}

/* Cabeçalho - Preto com logo vermelho */
nav {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-nav);
  box-shadow: 0 2px 10px var(--shadow);
  backdrop-filter: blur(10px);
}

h1 {
  color: var(--accent-red);
  font-size: 24px;
  font-weight: bold;
  display: inline;
}

img {
  width: 100%;
}

.overflow-hidden {
  overflow: hidden;
}

.logo-pinterest {
  display: flex;
  align-items: center;
  width: fit-content;
  column-gap: 8px;
}

.link-nav {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-nav);
  text-decoration: none;
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
}

.link-nav:hover {
  color: var(--accent-red);
  text-decoration: none;
}

.link-nav svg {
  transition: transform 0.3s ease;
}

.link-nav:hover svg {
  transform: scale(1.1);
}

.restante-nav {
  display: flex;
  align-items: center;
  column-gap: 24px;
  width: fit-content;
}

.container-login {
  padding-bottom: 100px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.bg-imagem-pinterest {
  width: 100%;
  position: fixed;
  top: 50vh;
}

.container {
  display: flex;
  flex-direction: column;
  row-gap: 20px;
}

.container-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(17, 24, 39, 0.8);
  display: flex;
  z-index: 1000;
}

.popup {
  width: 400px;
  margin: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  row-gap: 20px;
  padding: 40px;
  border-radius: 16px;
  background-color: var(--bg-primary);
  box-shadow: 0 20px 40px var(--shadow);
  backdrop-filter: blur(10px);
}

.div-input {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  row-gap: 8px;
}

.div-botao {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  row-gap: 8px;
  margin-top: 16px;
}

.label {
  margin-right: auto;
  margin-left: 15px;
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 600;
}

.input {
  width: 100%;
  font-size: 16px;
  padding: 16px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  box-sizing: border-box;
  font-family: inherit;
  transition: border-color 0.3s ease;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.input:focus {
  outline: none;
  border-color: #2563EB;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Botão Azul para Salvar */
.botao-login {
  border-radius: 12px;
  padding: 16px 24px;
  width: 100%;
  border: 0;
  text-transform: uppercase;
  font-weight: bold;
  cursor: pointer;
  background-color: var(--accent-blue);
  color: #ffffff;
  transition: all 0.3s ease;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.botao-login:hover {
  background-color: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.link-criarconta {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
}

.link-criarconta:hover {
  color: var(--accent-red);
  text-decoration: underline;
}

.botao-perfil a {
  background-color: var(--bg-nav);
  color: white;
  padding: 12px 24px;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.botao-perfil a:hover {
  background-color: var(--accent-red);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(220, 38, 38, 0.3);
}

/* Grid de Pins - Cards cinza claro com bordas azuis no hover */
.conteudo {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  width: 100%;
  max-width: 100vw;
  gap: 20px;
  padding: 24px;
  box-sizing: border-box;
}

.bloco-imagem {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background-color: var(--card-bg);
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--shadow);
}

.bloco-imagem:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px var(--shadow);
  border: 2px solid var(--accent-blue);
}

.bloco-imagem img {
  border-radius: 16px;
  height: 300px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.bloco-imagem:hover img {
  transform: scale(1.05);
}

/* Botão de alternância de tema */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-nav);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: scale(1.1);
}

.bloco-add-img {
  display: flex;
  flex-direction: column;
  align-items: center;
  row-gap: 16px;
  padding: 32px;
  background-color: var(--bg-secondary);
  border-radius: 16px;
  margin: 24px;
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
}

.botao-arquivo {
  padding: 12px 20px;
  border-radius: 12px;
  border: 0;
  background-color: var(--bg-nav);
  color: #ffffff;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}

.botao-arquivo:hover {
  background-color: var(--accent-red);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(220, 38, 38, 0.3);
}

.bloco-arquivo {
  background-color: var(--card-bg);
  padding: 16px 24px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  column-gap: 12px;
  border: 2px solid transparent;
  transition: border-color 0.3s ease;
}

.bloco-arquivo:hover {
  border-color: var(--accent-blue);
}

.input-arquivo {
  display: none;
}

#imagem-arquivo {
  display: none;
  color: var(--text-primary);
  font-weight: 500;
}

#imagem-arquivo.visivel {
  display: inline-block;
}

.bloco-add-img .botao-login {
  width: auto;
  padding: 12px 32px;
}

.bloco-input-botao {
  display: flex;
  column-gap: 20px;
  align-items: center;
}

/* Responsividade */
@media (max-width: 768px) {
  .conteudo {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    padding: 16px;
    gap: 16px;
  }
  
  .bloco-imagem img {
    height: 250px;
  }
  
  nav {
    padding: 12px 16px;
  }
  
  .restante-nav {
    column-gap: 16px;
  }
}

@media (max-width: 480px) {
  .conteudo {
    grid-template-columns: 1fr;
    padding: 12px;
  }
  
  .popup {
    width: 90%;
    padding: 24px;
  }
}