:root {
  --tg-theme-bg-color: #ffffff;
  --tg-theme-text-color: #000000;
  --tg-theme-hint-color: #999999;
  --tg-theme-link-color: #2481cc;
  --tg-theme-button-color: #2481cc;
  --tg-theme-button-text-color: #ffffff;
}

body {
  font-family: 'Segoe UI', sans-serif;
  text-align: center;
  padding: 10px;
  background-color: var(--tg-theme-bg-color);
  color: var(--tg-theme-text-color);
  min-height: 100vh;
}

h1 {
  margin-top: 0px;
  margin-bottom: 30px;
  font-size: 24px;
  color: var(--tg-theme-text-color);
}

.container {
  max-width: 90vw;
  margin: 0.5rem auto;
}

.send-button {
  background-color: var(--tg-theme-button-color);
  color: var(--tg-theme-button-text-color);
  padding: 15px;
  font-size: 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 30px;
  transition: opacity 0.3s;
  max-width: 90vw;
  word-break: break-word;
  white-space: normal;
  width: 100%;
}

.send-button:hover {
  opacity: 0.9;
}

#fileList {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

#fileList li {
  margin: 10px 0;
  color: var(--tg-theme-text-color);
  padding: 10px;
  background-color: var(--tg-theme-bg-color);
  border: 1px solid var(--tg-theme-hint-color);
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.remove-file {
  margin-left: 15px;
  color: #ff6b6b;
  cursor: pointer;
  font-size: 18px;
}

.file-direct {
  background-color: var(--tg-theme-bg-color);
  color: var(--tg-theme-text-color);
  padding: 15px;
  font-size: 18px;
  border: 1px solid var(--tg-theme-hint-color);
  border-radius: 8px;
  cursor: pointer;
  margin: 20px 0;
  max-width: 90vw;
  word-break: break-word;
  white-space: normal;
  width: 100%;
  box-sizing: border-box;
}

.loader {
  font-size: 18px;
  color: var(--tg-theme-button-color);
  margin: 20px auto;
  display: none;
  text-align: center;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--tg-theme-hint-color);
  border-radius: 50%;
  border-top-color: var(--tg-theme-button-color);
  animation: spin 1s ease-in-out infinite;
  margin-right: 10px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

#status {
  margin-top: 20px;
  color: var(--tg-theme-text-color);
  font-size: 16px;
}

#messageInput {
  width: 91%;
  margin-top: 20px;
  padding: 15px;
  background-color: var(--tg-theme-bg-color);
  border: 1px solid var(--tg-theme-hint-color);
  color: var(--tg-theme-text-color);
  border-radius: 8px;
  font-size: 16px;
  resize: vertical;
  min-height: 100px;
}

#centerInfo {
  margin-bottom: 20px;
  font-size: 18px;
  color: var(--tg-theme-text-color);
  line-height: 1.5;
}

#centerName, #centerType {
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
}

.dropdown-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
}

.dropdown-content {
  position: absolute;
  background: var(--tg-theme-bg-color);
  border: 1px solid var(--tg-theme-hint-color);
  border-radius: 8px;
  padding: 15px;
  z-index: 1000;
  max-width: 90%;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dropdown-content input {
  width: 90%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid var(--tg-theme-hint-color);
  border-radius: 8px;
  background: var(--tg-theme-bg-color);
  color: var(--tg-theme-text-color);
  margin-bottom: 10px;
}

.dropdown-list {
  max-height: 300px;
  overflow-y: auto;
  list-style: none;
  padding: 0;
  margin: 0;
}

.dropdown-list li {
  padding: 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--tg-theme-hint-color);
  font-size: 16px;
}

.dropdown-list li:hover {
  background: var(--tg-theme-hint-color);
  opacity: 0.8;
}

.dropdown-select {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid var(--tg-theme-hint-color);
  border-radius: 8px;
  background: var(--tg-theme-bg-color);
  color: var(--tg-theme-text-color);
}

.file-input-container {
  position: relative;
  width: 100%;
  margin: 20px 0;
}

.file-input-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px 20px;
  background-color: var(--tg-theme-bg-color);
  border: 2px dashed var(--tg-theme-hint-color);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.file-input-label:hover {
  border-color: var(--tg-theme-button-color);
  background-color: var(--tg-theme-bg-color);
}

.file-input-label .icon {
  font-size: 32px;
  margin-bottom: 10px;
  color: var(--tg-theme-button-color);
}

.file-input-label .text {
  font-size: 16px;
  color: var(--tg-theme-text-color);
  text-align: center;
}

.file-input-label .subtext {
  font-size: 14px;
  color: var(--tg-theme-hint-color);
  margin-top: 5px;
}

input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  cursor: pointer;
}