:root {
  --azul: #17a5e6;
  --azul-escuro: #0f8fc9;
  --tinta: #14161c;
  --tinta-suave: #4b5163;
  --fundo: #ffffff;
  --fundo-alt: #f5f7fa;
  --borda: #e6e9ef;
  --erro: #d64545;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  color: var(--tinta);
  background: var(--fundo-alt);
}

.hidden {
  display: none !important;
}

/* ---- Tela de login ---- */

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: #fff;
  border: 1px solid var(--borda);
  border-radius: 16px;
  box-shadow: 0 20px 40px -20px rgba(20, 22, 28, 0.2);
  padding: 36px 32px;
}

.login-card img {
  height: 32px;
  margin-bottom: 24px;
}

.login-card h1 {
  font-size: 18px;
  margin: 0 0 4px;
}

.login-card p.hint {
  font-size: 13.5px;
  color: var(--tinta-suave);
  margin: 0 0 24px;
}

.campo {
  margin-bottom: 16px;
}

.campo label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.campo input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--borda);
  border-radius: 8px;
  font-size: 14px;
}

.campo input:focus {
  outline: 2px solid var(--azul);
  outline-offset: 1px;
}

.btn-login {
  width: 100%;
  padding: 11px;
  border: none;
  border-radius: 999px;
  background: var(--azul);
  color: #fff;
  font-weight: 700;
  font-size: 14.5px;
  cursor: pointer;
  margin-top: 4px;
}

.btn-login:hover {
  background: var(--azul-escuro);
}

.btn-login:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.erro-msg {
  background: rgba(214, 69, 69, 0.08);
  color: var(--erro);
  border: 1px solid rgba(214, 69, 69, 0.25);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13.5px;
  margin-bottom: 16px;
}

.login-card a.voltar {
  display: inline-block;
  margin-top: 20px;
  font-size: 13px;
  color: var(--tinta-suave);
  text-decoration: none;
}

.login-card a.voltar:hover {
  color: var(--azul-escuro);
}

/* ---- Shell do dashboard ---- */

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 64px 1fr;
  grid-template-areas:
    'sidebar header'
    'sidebar main';
}

.shell__header {
  grid-area: header;
  background: #fff;
  border-bottom: 1px solid var(--borda);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 28px;
  gap: 14px;
}

.shell__user {
  font-size: 13.5px;
  color: var(--tinta-suave);
}

.shell__user strong {
  color: var(--tinta);
}

.btn-sair {
  border: 1px solid var(--borda);
  background: #fff;
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.btn-sair:hover {
  border-color: var(--azul);
  color: var(--azul-escuro);
}

.shell__sidebar {
  grid-area: sidebar;
  background: var(--tinta);
  color: #fff;
  padding: 20px 16px;
}

.shell__sidebar img {
  height: 28px;
  margin: 6px 8px 28px;
}

.shell__nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 4px;
  cursor: default;
}

.shell__nav small {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.12);
  padding: 2px 6px;
  border-radius: 999px;
}

.shell__main {
  grid-area: main;
  padding: 32px;
}

.placeholder-card {
  background: #fff;
  border: 1px dashed var(--borda);
  border-radius: 14px;
  padding: 48px;
  text-align: center;
  color: var(--tinta-suave);
}

.placeholder-card h2 {
  color: var(--tinta);
  font-size: 20px;
  margin: 0 0 8px;
}

.acesso-negado {
  max-width: 420px;
  margin: 0 auto;
  text-align: center;
}

@media (max-width: 720px) {
  .shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      'header'
      'main';
  }

  .shell__sidebar {
    display: none;
  }
}