/* Global Styles & Variables */
:root {
  --primary-color: #ef2f2f;
  /* Indigo 500 */
  --primary-hover: #ef2f2f;
  /* Indigo 600 */
  --secondary-color: #ef2f2f;
  /* Pink 500 */
  --bg-color: #f8fafc;
  /* Slate 50 */
  --card-bg: #ffffff;
  --text-main: #1e293b;
  /* Slate 800 */
  --text-muted: #64748b;
  /* Slate 500 */
  --border-color: #e2e8f0;
  /* Slate 200 */
  --success-color: #ef2f2f;
  /* Emerald 500 */
  --error-color: #ef4444;
  /* Red 500 */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 0.75rem;
}

/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  background-image: linear-gradient(rgba(248, 250, 252, 0.85), rgba(248, 250, 252, 0.85)), url('images/background.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  border-radius: var(--radius);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  color: var(--text-main);
}

h2 {
  font-size: 2rem;
  color: var(--text-main);
}

p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

/* Layout & Containers */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

main {
  flex: 1;
  padding: 3rem 0;
}

/* Navbar */
.navbar {
  background-color: var(--card-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
  letter-spacing: -0.025em;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 4px 6px -1px rgb(99 102 241 / 0.3);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Forms */
.form-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.form-control,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

/* Tables */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  background: var(--card-bg);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: #f1f5f9;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

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

/* Badges */
.badge {
  display: inline-flex;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
}

.badge-success {
  background-color: rgb(16 185 129 / 0.1);
  color: var(--success-color);
}

.badge-error {
  background-color: rgb(239 68 68 / 0.1);
  color: var(--error-color);
}

/* Footer */
footer {
  background-color: var(--card-bg);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    /* simple mobile hide for now, could be improved */
  }

  .navbar .container {
    justify-content: center;
  }

  h1 {
    font-size: 2rem;
  }

  .table-container {
    box-shadow: none;
  }
}