:root {
  /* Cores padrão (modo claro) */
  --primary-blue: #6c50f7;
  --primary-blue-hover: #4c12a3;
  --secondary-blue: #06d6b6;
  --secondary-blue-hover: #05b89c;
  --gray: #9ef618;
  --gray-hover: #85d314;
  --danger-red: #e53e3e;
  --danger-red-hover: #c53030;
  --background-gradient-start: #e0e7ff;
  --background-gradient-end: #f3e8ff;
  --white: #ffffff;
  --white-text: #ffffff;
  --off-white: #f1f5f9;
  --light-gray: #e2e8f0;
  --light-gray-bg: #edf2f7;
  --text-dark: #1a202c;
  --text-medium: #2d3748;
  --text-gray: #4a5568;
  --card-initial: #bdecb6;
  --card-warning: #fefcbf;
  --card-due-today: #fed7aa;
  --card-overdue: #fecaca;
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-dark: rgba(0, 0, 0, 0.15);
  --modal-overlay: rgba(0, 0, 0, 0.5);
  --loading-bg: rgba(255, 255, 255, 0.95);
}

:root.dark-mode {
  --primary-blue: #8b5cf6;
  --primary-blue-hover: #a78bfa;
  --secondary-blue: #2ee4c8;
  --secondary-blue-hover: #5eead4;
  --gray: #bef264;
  --gray-hover: #d1f58e;
  --danger-red: #f56565;
  --danger-red-hover: #feb2b2;
  --background-gradient-start: #2d3748;
  --background-gradient-end: #4a5568;
  --white: #2d3748;
  --white-text: #ffffff;
  --off-white: #4a5568;
  --light-gray: #718096;
  --light-gray-bg: #4a5568;
  --text-dark: #e2e8f0;
  --text-medium: #cbd5e0;
  --text-gray: #a0aec0;
  --card-initial: #68d391;
  --card-warning: #faf089;
  --card-due-today: #f6ad55;
  --card-overdue: #f687b3;
  --shadow-light: rgba(255, 255, 255, 0.05);
  --shadow-medium: rgba(255, 255, 255, 0.1);
  --shadow-dark: rgba(255, 255, 255, 0.15);
  --modal-overlay: rgba(0, 0, 0, 0.7);
  --loading-bg: rgba(45, 55, 72, 0.95);
}

body {
  font-family: "Arial", sans-serif;
  background: linear-gradient(
    to bottom,
    var(--background-gradient-start),
    var(--background-gradient-end)
  );
  color: var(--text-dark);
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

header {
  background: var(--white);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px var(--shadow-medium);
}

.logo img {
  height: 50px;
}

.header-actions button {
  background: var(--primary-blue);
  color: var(--white-text);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

.header-actions button:hover {
  background: var(--primary-blue-hover);
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1 {
  text-align: center;
  color: var(--text-dark);
}

.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.filters select,
.filters button {
  padding: 0.5rem;
  border-radius: 5px;
  border: 1px solid var(--light-gray);
  background: var(--white);
  color: var(--text-dark);
}

.filters button {
  background: var(--secondary-blue);
  color: var(--white-text);
  border: none;
  cursor: pointer;
  transition: background 0.3s;
}

.filters button:hover {
  background: var(--secondary-blue-hover);
}

.summary {
  display: flex;
  gap: 2rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.summary p {
  background: var(--white);
  padding: 1rem;
  border-radius: 5px;
  box-shadow: 0 2px 4px var(--shadow-light);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  box-shadow: 0 2px 8px var(--shadow-medium);
  border-radius: 5px;
  overflow: hidden;
}

th,
td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--light-gray);
}

th {
  background: var(--primary-blue);
  color: var(--white-text);
}

td select {
  padding: 0.5rem;
  border-radius: 5px;
  border: 1px solid var(--light-gray);
}

td button {
  background: var(--primary-blue);
  color: var(--white-text);
  border: none;
  padding: 0.5rem;
  border-radius: 5px;
  cursor: pointer;
  margin-right: 0.5rem;
  transition: background 0.3s;
}

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

td button.delete {
  background: var(--danger-red);
}

td button.delete:hover {
  background: var(--danger-red-hover);
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-overlay);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: var(--white);
  padding: 2rem;
  border-radius: 10px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 4px 8px var(--shadow-dark);
  position: relative;
}

.modal-body label {
  display: block;
  margin: 0.5rem 0 0.2rem;
  color: var(--text-medium);
}

.modal-body input,
.modal-body select {
  width: 100%;
  padding: 0.5rem;
  border-radius: 5px;
  border: 1px solid var(--light-gray);
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.modal-actions button {
  padding: 0.5rem 1rem;
  border-radius: 5px;
  border: none;
  cursor: pointer;
  transition: background 0.3s;
}

.modal-actions button:first-child {
  background: var(--primary-blue);
  color: var(--white-text);
}

.modal-actions button:first-child:hover {
  background: var(--primary-blue-hover);
}

.modal-actions button:last-child {
  background: var(--danger-red);
  color: var(--white-text);
}

.modal-actions button:last-child:hover {
  background: var(--danger-red-hover);
}

.loading {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--loading-bg);
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  color: var(--text-dark);
  z-index: 2000;
}

.status-ok {
  background: var(--card-initial);
}

.status-pendente {
  background: var(--card-overdue);
}

.status-na {
  background: var(--card-warning);
}

@media (max-width: 768px) {
  .filters {
    flex-direction: column;
  }
  .summary {
    flex-direction: column;
  }
  table {
    font-size: 0.9rem;
  }
}