/* ==== THEME VARIABLES ==== */
:root {
  --bg-color: #f9f9f9;
  --text-color: #1b1b1b;
  --heading-color: #1b1b1b;
  --card-bg: white;
  --accent: #00aaff;
  --accent-hover: #e9f7ff;
  --table-row-alt: #f2f2f2;
  --table-border: #e0e0e0;
  --navbar-bg: #1b1b1b;
  --navbar-text: white;
  --button-bg: #ff4a4a;
  --button-hover: #e63c3c;
}

/* Dark mode override when body has class .dark */
body.dark {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --heading-color: #ffffff;
  --card-bg: #1e1e1e;
  --accent: #00aaff;
  --accent-hover: #004466;
  --table-row-alt: #1a1a1a;
  --table-border: #333;
  --navbar-bg: #222;
  --navbar-text: #eee;
  --button-bg: #e03d3d;
  --button-hover: #c53030;
}

/* ==== RESET ==== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ==== BODY & PAGE LAYOUT ==== */
body {
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  padding: 2rem 5%;
}

/* ==== NAVBAR ==== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--navbar-bg);
  color: var(--navbar-text);
  padding: 1rem 5%;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.navbar-logo {
  font-size: 1.6rem;
  font-weight: 600;
}

.navbar-links a {
  color: var(--navbar-text);
  text-decoration: none;
  margin-left: 1rem;
  transition: color 0.2s;
}

.navbar-links a:hover {
  color: var(--accent);
}

/* ==== LOGOUT / THEME TOGGLE BUTTON ==== */
.logout-btn {
  background-color: var(--button-bg);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  text-decoration: none;
  color: white;
  transition: background-color 0.2s ease-in-out;
  margin-left: 1.5rem;
  border: none;
  cursor: pointer;
}

.logout-btn:hover {
  background-color: var(--button-hover);
}

/* ==== HEADINGS ==== */
h1, h2 {
  margin-bottom: 1rem;
  color: var(--heading-color);
}

/* ==== TABLES ==== */
.styled-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
  background-color: var(--card-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.styled-table thead {
  background-color: var(--accent);
  color: white;
  font-weight: bold;
}

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

.styled-table tbody tr:nth-child(even) {
  background-color: var(--table-row-alt);
}

.styled-table tbody tr:hover {
  background-color: var(--accent-hover);
}

/* ==== RESPONSIVE ==== */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .navbar-links {
    margin-top: 0.5rem;
  }

  .container {
    padding: 1rem 3%;
  }

  .styled-table th,
  .styled-table td {
    font-size: 0.9rem;
    padding: 0.75rem;
  }
}

.flash {
  margin: 1rem 0;
  padding: 1rem;
  border-radius: 6px;
  font-weight: bold;
}

.flash-success {
  background-color: #d4f5dd;
  color: #1e4620;
  border: 1px solid #8bd9a4;
}

.flash-error {
  background-color: #ffe0e0;
  color: #991b1b;
  border: 1px solid #ff5f5f;
}

body.dark {
  background-color: #121212;
  color: #e0e0e0;
}

body.dark .form-box {
  background-color: #1e1e1e;
  color: #e0e0e0;
}

body.dark input, 
body.dark select, 
body.dark button {
  background-color: #2a2a2a;
  color: #f1f1f1;
  border-color: #444;
}

body.dark .success {
  background-color: #2e7d32;
  color: #e8f5e9;
}

body.dark .error {
  background-color: #c62828;
  color: #ffebee;
}

body.dark .logout-btn {
  background-color: #555;
  color: white;
}

body.dark .logout-btn:hover {
  background-color: #777;
}