/* =========================
   VARIÁVEIS DE TEMA
========================= */
:root {
  --primary: #40739e;
  --accent: #00a8ff;
  --sidebar-bg: #2f3640;
  --card-bg: #ffffff;
  --text-color: #2d3436;
  --border-color: #ddd;
  --bg: #f5f6fa;
  --transition: 0.3s ease;
}

/* =========================
   ESTILO GLOBAL
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  background-color: var(--bg);
  display: flex;
  color: var(--text-color);
  min-height: 100vh;
  overflow-x: hidden;
}

/* =========================
   SIDEBAR FIXA RESPONSIVA
========================= */
.sidebar {
  width: 250px;
  background-color: var(--sidebar-bg);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  position: fixed;
  height: 100%;
  transition: transform 0.3s ease;
  z-index: 1000;
  left: 0;
}

.sidebar.closed {
  transform: translateX(-100%);
}

.sidebar .logo {
  text-align: center;
  margin-bottom: 30px;
}

.sidebar .logo h2 {
  color: var(--accent);
  font-size: 22px;
  letter-spacing: 1px;
}

.sidebar .menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar .menu-item {
  padding: 15px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: var(--transition);
}

.sidebar .menu-item:hover,
.sidebar .menu-item.active {
  background-color: var(--primary);
}

.sidebar .menu-item i {
  width: 20px;
  text-align: center;
}

/* =========================
   BOTÃO HAMBURGER
========================= */
.hamburger {
  display: none;
  font-size: 25px;
  cursor: pointer;
  color: var(--primary);
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 1100;
}

/* =========================
   CONTEÚDO PRINCIPAL
========================= */
.content {
  margin-left: 250px;
  padding: 20px;
  flex: 1;
  transition: margin-left 0.3s ease;
}

.content.full-width {
  margin-left: 0;
}

/* =========================
   HEADER
========================= */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--card-bg);
  padding: 15px 20px;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.header h1 {
  font-size: 20px;
  color: var(--primary);
}

.user-info {
  display: flex;
  align-items: center;
  font-weight: bold;
}

/* =========================
   CARDS
========================= */
.card {
  background-color: var(--card-bg);
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  margin-bottom: 25px;
  padding: 20px;
  overflow-x: auto;
}

.card-header {
  font-weight: bold;
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 15px;
}

/* =========================
   TABELAS
========================= */
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

th, td {
  border: 1px solid var(--border-color);
  padding: 10px;
  text-align: center;
}

th {
  background-color: var(--primary);
  color: #fff;
}

tr:nth-child(even) {
  background-color: #f9f9f9;
}

td button {
  padding: 5px 10px;
  background: var(--accent);
  border: none;
  border-radius: 5px;
  color: #fff;
  cursor: pointer;
  transition: var(--transition);
}

td button:hover {
  background: var(--primary);
}

/* =========================
   FORMULÁRIOS
========================= */
form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 600;
  margin-bottom: 5px;
}

input, select {
  padding: 10px;
  border-radius: 5px;
  border: 1px solid var(--border-color);
  outline: none;
}

button[type="submit"] {
  background: var(--primary);
  color: #fff;
  padding: 10px;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition);
}

button[type="submit"]:hover {
  background: var(--accent);
}

/* =========================
   TABS
========================= */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =========================
   RESPONSIVIDADE
========================= */

/* Tablets */
@media (max-width: 992px) {
  .sidebar {
    width: 220px;
  }

  .content {
    margin-left: 220px;
  }

  .header h1 {
    font-size: 18px;
  }

  table {
    min-width: 500px;
  }
}

/* Telemóveis */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .content {
    margin-left: 0;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    min-width: 100%;
  }

  th, td {
    padding: 8px;
    font-size: 13px;
  }

  button[type="submit"] {
    width: 100%;
  }
}

/* Telemóveis pequenos */
@media (max-width: 480px) {
  .header h1 {
    font-size: 17px;
  }

  .card-header {
    font-size: 15px;
  }

  .sidebar .menu-item {
    font-size: 13px;
    padding: 8px 10px;
  }

  th, td {
    font-size: 12px;
    padding: 6px;
  }
}