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

/* ================= BODY ================= */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #f4f7f9;
  height: 100vh;
  overflow: hidden;
  /* no scroll desktop */
}

/* ================= LINKS ================= */
a {
  text-decoration: none !important;
  color: #007bff;
}

/* ================= NAVBAR ================= */
.navbar {
  width: 100%;
  height: 60px;
  background-color: #007bff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  position: fixed;
  top: 0;
  left: 0;
  color: white;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 15px;
}

.nav-logo {
  height: 70px;
  filter: brightness(0) invert(1);
}

.toggle-btn {
  font-size: 26px;
  cursor: pointer;
}

/* ================= SIDEBAR ================= */
.sidebar {
  width: 250px;
  background: white;
  height: calc(100vh - 60px);
  position: fixed;
  top: 60px;
  left: 0;
  padding-top: 20px;
  border-right: 1px solid #d6d6d6;
  display: flex;
  flex-direction: column;
}

.sidebar.hide {
  left: -250px;
}

.menu-items {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.menu-btn {
  padding: 14px 20px;
  font-size: 16px;
  color: #007bff;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 1px solid #e5e5e5;
}

.menu-btn:hover {
  background: #e9f3ff;
}

.submenu {
  display: none;
  background: #f4faff;
}

.submenu a {
  padding: 12px 35px;
  display: block;
  color: #0056b3;
}

/* ================= MAIN ================= */
.main {
  margin-left: 250px;
  margin-top: 60px;
  width: calc(100% - 250px);
  height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  /* ✅ vertical center */
  justify-content: center;
  /* ✅ horizontal center */
  padding: 30px;
}

/* ================= CONTAINER ================= */
.container {
  width: 100%;
  max-width: 680px;
  /* 🔥 laptop & desktop size */
  background: #ffffff;
  padding: 45px 55px;
  border-radius: 14px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.12);
  text-align: center;
}

/* ================= HEADING ================= */
.container h2 {
  font-size: 28px;
  font-weight: 700;
  color: #1f2d3d;
  margin-bottom: 25px;
}

/* ================= FORM ================= */
form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ================= FORM ELEMENTS ================= */
label {
  font-weight: 600;
  margin-bottom: 6px;
  color: #333;
}

select {
  width: 100%;
  max-width: 320px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 16px;
}

select:focus {
  border-color: #007bff;
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.18);
}

/* ================= BUTTON ================= */
button {
  margin-top: 22px;
  width: 100%;
  max-width: 320px;
  padding: 13px;
  font-size: 16px;
  font-weight: 600;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background-color: #0069d9;
}

/* ================= LAPTOP ================= */
@media (max-width: 1400px) {
  .container {
    max-width: 620px;
    padding: 40px 48px;
  }
}

/* ================= TABLET ================= */
@media (max-width: 992px) {
  body {
    overflow-y: auto;
  }

  .main {
    margin-left: 0;
    width: 100%;
    height: auto;
    padding: 40px 20px;
  }

  .container {
    max-width: 560px;
  }
}

/* ================= MOBILE ================= */
@media (max-width: 768px) {
  body {
    overflow-y: auto;
  }

  .main {
    margin-top: 70px;
    height: auto;
    padding: 20px 15px;
  }

  .container {
    max-width: 100%;
    padding: 28px 22px;
  }

  .container h2 {
    font-size: 22px;
  }

  select,
  button {
    max-width: 100%;
  }
}