* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #e1e1e4;
}

.container {
  background: #f1f3f9;
  padding: 30px;
  border-radius: 14px;
  width: 390px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

/* Amount box */
.amount p {
  font-weight: bold;
  margin-bottom: 10px;
}

.amount input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 2px solid #6d6a6a;
  outline: none;
  font-size: 16px;
  margin-bottom: 20px;
}

/* Dropdown section */
.dropdowns {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.dropdown p {
  font-weight: bold;
  margin-bottom: 10px;
}

/* ✅ Swap icon */
.dropdowns i {
  font-size: 20px;
  cursor: pointer;
  margin-top: 22px;
  color: #59595a;
  transition: 0.2s ease;
}

.dropdowns i:hover {
  transform: scale(1.2);
  color: #2e2d2d;
}

/* ✅ Custom Select Dropdown */
.custom-select {
  border: 2px solid #6d6a6a;
  border-radius: 10px;
  position: relative;
  width: 150px;
  cursor: pointer;
  user-select: none;
  z-index: 999;
}

/* Selected value box */
.selected {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid #ccc;
  background: white;
}

.selected .flag {
  width: 30px;
  height: 22px;
  border-radius: 4px;
}

.selected .code {
  font-weight: 600;
  flex: 1;
  font-size: 15px;
}

.selected .arrow {
  font-size: 14px;
  color: #555;
}

/* ✅ Options dropdown list */
.options {
  position: absolute;
  top: 115%;
  left: 0;
  width: 100%;
  max-height: 220px;
  overflow-y: auto;
  background: white;
  border-radius: 10px;
  border: 1px solid #ccc;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
  padding: 5px 0;
}

/* Option item */
.option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  transition: 0.2s;
}

.option img {
  width: 28px;
  height: 20px;
  border-radius: 4px;
}

.option span {
  font-weight: 500;
}

.option:hover {
  background: #f2f2f2;
}

/* Hide dropdown options */
.hidden {
  display: none;
}

/* Button */
button {
  width: 100%;
  padding: 12px;
  border: none;
  background: #59595a;
  color: white;
  font-size: 17px;
  font-weight: bold;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.2s ease;
}

button:hover {
  background: #2e2e2f;
}

/* Message */
.msg {
  margin-top: 20px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
}

/* ✅ Top header */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

/* ✅ Dark mode toggle button */
.theme-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 20px;
  color: #ffff;
  transition: 0.2s;
  width: 50px;
  height: 50px;
  display: flex;
  justify-content: center;
  border-radius: 50%;
  align-items: center;
  background: #59595a;
}

.theme-btn:hover {
  transform: scale(1.1);
  background: #2e2e2f;
  color:#fff


}

/* ✅ Smooth mode transition */
body,
.container,
.selected,
.options,
.amount input {
  transition: 0.3s ease;
}

/* ✅ DARK MODE */
body.dark {
  background: #121212;
}

body.dark .container {
  background: #1e1e1e;
  color: #ffffff;
}

body.dark .amount input {
  background: #2a2a2a;
  color: #ffffff;
  border: 1px solid #444;
}

body.dark .selected {
  background: #2a2a2a;
  border: 1px solid #444;
}

body.dark .options {
  background: #2a2a2a;
  border: 1px solid #444;
}

body.dark .option:hover {
  background: #3a3a3a;
}

body.dark button {
  background: #59595a;
}

body.dark button:hover {
  background: #2e2e2f;
}

body.dark .theme-btn {
  color: #fff;
}

body.dark .dropdowns i {
  color: #ffff;
}

/* ============================= */
/* ✅ RESPONSIVE DESIGN */
/* ============================= */

/* For tablets and smaller screens */
@media (max-width: 768px) {
  body {
    padding: 20px;
    height: auto;
  }

  .container {
    width: 100%;
    max-width: 420px;
    padding: 25px;
  }

  h2 {
    font-size: 24px;
  }

  .amount input {
    font-size: 15px;
  }

  button {
    font-size: 16px;
  }
}

/* For mobile screens */
@media (max-width: 480px) {
  .container {
    width: 100%;
    padding: 20px;
    border-radius: 12px;
  }

  h2 {
    font-size: 20px;
  }

  .dropdowns {
    flex-direction: column;
    align-items: stretch;
    gap: 15px;
  }

  .custom-select {
    width: 100%;
  }

  .selected {
    width: 100%;
  }

  /* Swap icon center */
  .dropdowns i {
    margin: 0 auto;
    font-size: 22px;
    padding: 8px 0;
  }

  button {
    font-size: 15px;
    padding: 11px;
  }

  .msg {
    font-size: 16px;
  }

  .theme-btn {
    width: 45px;
    height: 45px;
    font-size: 18px;
  }
}