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

body {
  font-family: Arial, sans-serif;
  background-color: #1a1a1a;
  color: #f0f0f0;
}

/* ── Header ── */
header {
  display: flex;
  align-items: center;
  padding: 16px 32px;
  background-color: #2c5f2e;
  border-bottom: 3px solid #4a9e4d;
  gap: 20px;
}

.menu-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
  flex-shrink: 0;
}

.menu-toggle:hover {
  color: #b8e6b9;
}

header h1 {
  font-size: 2rem;
  letter-spacing: 2px;
  color: #ffffff;
  text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

/* ── Left sidebar ── */
.sidebar {
  position: fixed;
  top: 0;
  left: -260px;
  width: 260px;
  height: 100%;
  background-color: #1e4620;
  border-right: 3px solid #4a9e4d;
  z-index: 1000;
  transition: left 0.25s ease;
  display: flex;
  flex-direction: column;
  padding-top: 70px;
}

.sidebar.open {
  left: 0;
}

.sidebar-link {
  display: block;
  padding: 16px 28px;
  color: #f0f0f0;
  text-decoration: none;
  font-size: 1rem;
  font-weight: bold;
  border-bottom: 1px solid #2c5f2e;
  transition: background-color 0.15s;
}

.sidebar-link:hover {
  background-color: #2c5f2e;
  color: #ffffff;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
}

.sidebar-overlay.open {
  display: block;
}

/* ── Main content ── */
main {
  padding: 40px 32px;
}