/* GLOBAL */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  transition: background 0.3s, color 0.3s;
}

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

/* NAVBAR */
nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: #1a1a1a;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: background 0.3s;
}

body.dark-mode nav {
  background: #000;
}

.site-logo {
  height: 40px;
  margin-right: 20px;
  vertical-align: middle;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  padding: 0;
  margin: 0;
}

nav ul li a {
  color: #ccc;
  text-decoration: none;
  font-size: 18px;
  transition: color 0.3s;
}

nav ul li a.active,
nav ul li a:hover {
  color: #00c853;
}

body.dark-mode nav ul li a {
  color: #bbb;
}

/* DARK MODE TOGGLE BUTTON */
.dark-toggle {
  background: transparent;
  border: 1px solid #00c853;
  color: #00c853;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  transition: 0.3s;
}

.dark-toggle:hover {
  background: #00c853;
  color: #000;
}

body.dark-mode .dark-toggle {
  border-color: #00e676;
  color: #00e676;
}

body.dark-mode .dark-toggle:hover {
  background: #00e676;
  color: #000;
}

/* HERO */
.hero {
  text-align: center;
  padding: 120px 20px;
  background: linear-gradient(135deg, #00c853, #009624);
  color: white;
}

body.dark-mode .hero {
  background: linear-gradient(135deg, #007a3a, #005f2c);
}

/* TABS SECTION */
.tabs-section {
  max-width: 1100px;
  margin: 40px auto;
  display: flex;
  gap: 20px;
  padding: 20px;
}

.tab-card {
  flex: 1;
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  cursor: pointer;
  transition: 0.3s ease;
  border-left: 6px solid #00c853;
}

body.dark-mode .tab-card {
  background: #1e1e1e;
  box-shadow: 0 0 10px rgba(255,255,255,0.05);
}

.tab-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

body.dark-mode .tab-card:hover {
  box-shadow: 0 8px 20px rgba(255,255,255,0.08);
}

.tab-card h3 {
  margin-top: 0;
  color: #009624;
}

body.dark-mode .tab-card h3 {
  color: #00e676;
}

/* BONUS LIST