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

body {
  background: #0f1115;
  color: #e6e6e6;
  min-height: 100vh;
  padding: 40px 16px 140px;
}

/* Page content */
.container {
  max-width: 480px;
  margin: auto;
}

h2 {
  margin-bottom: 20px;
  font-weight: 500;
}

input,
textarea {
  width: 100%;
  background: #161a20;
  border: 1px solid #2a2f3a;
  border-radius: 10px;
  padding: 14px;
  color: #e6e6e6;
  font-size: 15px;
  margin-bottom: 16px;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: #4f7cff;
}

/* Keyboard */
.vk {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #12151b;
  border-top: 1px solid #242a35;
  padding: 12px 8px 16px;
  z-index: 9999;
}

.vk.hidden {
  display: none;
}

.vk-body {
  max-width: 720px;
  margin: auto;
}

.vk-row {
  display: flex;
  justify-content: center;
  margin-bottom: 8px;
}

.vk-key {
  min-width: 36px;
  padding: 12px 14px;
  margin: 3px;
  background: #1c212b;
  border: 1px solid #2a2f3a;
  border-radius: 10px;
  color: #e6e6e6;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}

.vk-key:hover {
  background: #252b36;
}

.vk-key:active {
  transform: scale(0.95);
}

.vk-key.space {
  min-width: 200px;
}

.vk-key.enter {
  background: #4f7cff;
  border-color: #4f7cff;
}

.vk-key.enter:hover {
  background: #3e68e0;
}

@media (max-width: 480px) {
  .vk-key {
    padding: 10px 12px;
    font-size: 13px;
  }

  .vk-key.space {
    min-width: 140px;
  }
}