:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --bg: #f3f4f6;
  --surface: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 40px 20px;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

header h1 {
  margin: 0;
  color: var(--primary);
  font-size: 2.2rem;
}

header p {
  color: var(--text-light);
  margin-top: 5px;
}

/* CARDS */
.card {
  background: var(--surface);
  border-radius: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  margin-bottom: 30px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.card-header {
  background: #f9fafb;
  padding: 15px 25px;
  border-bottom: 1px solid var(--border);
}

.card-header h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.card-body {
  padding: 25px;
}

/* FORMS */
.form-row {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

input, select {
  padding: 10px 15px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  flex: 1; 
  min-width: 200px;
  transition: border-color 0.2s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* BUTTONS */
button {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-danger {
  background: #fee2e2;
  color: var(--danger);
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-danger:hover {
  background: var(--danger);
  color: white;
}

/* TABLES */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th {
  background: #f9fafb;
  text-align: left;
  padding: 12px 15px;
  font-weight: 600;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

td {
  padding: 12px 15px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

tr:last-child td {
  border-bottom: none;
}