* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0e1116;
  color: #f3f5f7;
}

a {
  color: #60a5fa;
}

a:visited {
  color: #60a5fa;
}

.header,
.footer {
  text-align: center;
  padding: 20px 16px;
  background: #151a22;
}

.header h1 {
  margin: 0 0 8px;
}

.header p {
  margin: 0;
  color: #b7c1cf;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 32px;
  display: grid;
  gap: 20px;
}

.panel {
  background: #151a22;
  border: 1px solid #26303d;
  border-radius: 12px;
  padding: 18px;
}

.buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.main-btn,
.code-form button,
#copy-subscription-btn,
#copy-vless-btn {
  border: none;
  border-radius: 10px;
  padding: 12px 14px;
  background: #2d6ef2;
  color: #ffffff;
  font-weight: 600;
  cursor: pointer;
}

.link-like-btn {
  display: inline-block;
  text-decoration: none;
  text-align: center;
}

.link-like-btn,
.link-like-btn:visited,
.link-like-btn:hover,
.link-like-btn:active {
  color: #ffffff;
}

.main-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.code-form {
  margin-top: 12px;
  display: grid;
  gap: 10px;
  max-width: 360px;
}

input {
  width: 100%;
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 10px 12px;
  background: #0f1722;
  color: #f3f5f7;
}

.copy-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.message {
  margin-top: 10px;
  min-height: 22px;
  color: #fda4af;
}

.result {
  margin-top: 14px;
  padding: 14px;
  border-radius: 10px;
  background: #0f1722;
  border: 1px solid #334155;
  font-size: 18px;
  line-height: 1.45;
}

.back-link {
  display: inline-block;
  margin-bottom: 12px;
  color: #93c5fd;
  text-decoration: none;
}

.config-group {
  margin-top: 12px;
}

.qr-block {
  margin-top: 14px;
}

.qr-image {
  margin-top: 8px;
  width: 220px;
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid #334155;
}

.qr-note {
  margin-top: 6px;
  font-size: 12px;
  color: #94a3b8;
}

.platform-list {
  display: grid;
  gap: 12px;
}

.platform-list article {
  border: 1px solid #26303d;
  border-radius: 10px;
  padding: 12px;
  background: #101721;
}

.platform-item summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 22px;
  color: #e2e8f0;
}

.platform-item details[open] summary {
  margin-bottom: 10px;
}

.platform-item ol {
  font-size: 18px;
  line-height: 1.5;
}

.instruction-image {
  width: 100%;
  max-width: 720px;
  border-radius: 10px;
  border: 1px solid #334155;
}

.step-image {
  display: block;
  margin-top: 10px;
}

.hidden {
  display: none;
}