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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  background: #f6f6f7;
  color: #111;
}

/* ===== HEADER ===== */
header {
  height: 80px;
  background: #e4e4e4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
header h1 {
  color: #3a5edb;
  font-weight: 700;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 25px;
}

.subscribe-box {
  background: #fff;
  border-radius: 8px;
  padding: 4px 12px;
  display: flex;
  align-items: center;
  box-shadow: 0 0 3px rgba(0,0,0,0.2);
}
.subscribe-box input {
  border: none;
  outline: none;
  background: none;
  font-size: 14px;
  width: 220px;
}
.header-icons {
  display: flex;
  align-items: center;
  gap: 20px;
}
.header-icons .material-symbols-outlined {
  font-size: 26px;
  color: #3d45db;
  cursor: pointer;
  transition: .2s;
}
.header-icons .material-symbols-outlined:hover { color: #2b37d3; }
.avatar { position: relative; }
.status-dot {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 8px;
  height: 8px;
  background: #3d45db;
  border-radius: 50%;
}

/* ===== NAV ===== */
.container { display: flex; }

.horizontalenav {
  background: #fff;
  width: 250px;
  min-height: 100vh;
  border-right: 1px solid #d0d0d0;
  display: flex;
  flex-direction: column;
  padding: 30px 20px;
  gap: 10px;
}
.horizontalenav a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #111;
  text-decoration: none;
  font-weight: 500;
  border-radius: 8px;
  padding: 10px 12px;
}
.horizontalenav a:hover,
.horizontalenav a.active {
  background: #3d45db;
  color: #fff;
}

/* ===== MAIN CONTENT ===== */
.container1 {
  flex: 1;
  background: #f6f6f7;
  padding: 40px 50px;
}

.rechts {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}
.rechts h1 { font-size: 24px; margin-bottom: 4px; }
.button1 {
  background: #3d45db;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-weight: 600;
}
.button1:hover { background: #2c34c7; }

/* ===== BOXES ===== */
.box {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 15px;
  padding: 25px;
  margin-bottom: 30px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.box h1 {
  color: #111;
  font-size: 20px;
  margin-bottom: 8px;
}

.box p {
  color: #444;
  margin-bottom: 15px;
}

iframe {
  border-radius: 10px;
  border: 1px solid #ccc;
}