* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #080c14;
  color: #e2e8f0;
  line-height: 1.5;
  min-height: 100vh;
}

.page {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.registry-board {
  width: 100%;
  border: 1px solid #3d4f6f;
  border-radius: 12px;
  background: #111827;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.board-header {
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid #334155;
  background: linear-gradient(180deg, #1a2438 0%, #141c2e 100%);
}

.eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #64748b;
}

.board-header h1 {
  margin: 0 0 0.4rem;
  font-size: 1.55rem;
  font-weight: 700;
  color: #f8fafc;
}

.lead {
  margin: 0;
  font-size: 0.93rem;
  color: #94a3b8;
  line-height: 1.65;
  max-width: 36rem;
}

.board-body {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(300px, 340px);
  align-items: stretch;
  width: 100%;
}

.board-main {
  min-width: 0;
  border-right: 1px solid #334155;
  display: flex;
  flex-direction: column;
}

.form-wrap .block + .block {
  border-top: 1px solid #334155;
}

.board-side {
  min-width: 0;
  background: linear-gradient(180deg, #131b2e 0%, #0e1424 100%);
  display: flex;
  flex-direction: column;
}

.side-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.35rem 1.4rem 1.4rem;
  min-height: 100%;
}

.side-head {
  margin: 0 0 0.85rem;
}

.block {
  padding: 1.35rem 1.5rem;
}

.block-form-bottom {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.block-form-bottom .submit-btn {
  margin-top: auto;
}

.block-head {
  margin-bottom: 1.1rem;
}

.section-tag {
  margin: 0 0 0.2rem;
  font-size: 0.76rem;
  font-weight: 600;
  color: #94a3b8;
}

.section-tag::before {
  content: "[ ";
  color: #475569;
}

.section-tag::after {
  content: " ]";
  color: #475569;
}

.section-desc {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 600;
  color: #cbd5e1;
}

.inline-fields {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 172px;
  gap: 0.75rem;
  align-items: end;
}

.field {
  display: block;
  min-width: 0;
}

.field-full {
  margin-top: 0.9rem;
}

.field-label {
  display: block;
  margin-bottom: 0.38rem;
  font-size: 0.72rem;
  color: #64748b;
}

input,
select {
  display: block;
  width: 100%;
  height: 42px;
  padding: 0 0.75rem;
  border: 1px solid #475569;
  border-radius: 8px;
  background: #0a0f1a;
  color: #f1f5f9;
  font-size: 0.92rem;
}

input:focus,
select:focus {
  outline: none;
  border-color: #38bdf8;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.hint {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  margin: 0.7rem 0 0;
  font-size: 0.78rem;
  color: #64748b;
}

.hint-icon {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  border: 1px solid #475569;
  border-radius: 50%;
  font-size: 0.6rem;
  font-style: italic;
  font-weight: 700;
  line-height: 12px;
  text-align: center;
  color: #94a3b8;
}

.submit-btn {
  display: block;
  width: 100%;
  height: 46px;
  margin-top: 1.15rem;
  border: none;
  border-radius: 8px;
  background: linear-gradient(180deg, #4cc9ff 0%, #38bdf8 100%);
  color: #0f172a;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.15s ease;
}

.submit-btn:hover:not(:disabled) {
  filter: brightness(1.08);
}

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

.status {
  min-height: 1.2rem;
  margin: 0.7rem 0 0;
  font-size: 0.85rem;
  word-break: break-word;
}

.status.ok { color: #4ade80; }
.status.err { color: #f87171; }

/* 右侧：预览 + 须知一体 */
.preview-box {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 148px;
  padding: 1.2rem 1.15rem;
  border: 1px solid #3d4f6f;
  border-radius: 10px;
  background: #0a0f1a;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.preview-label {
  margin: 0 0 0.55rem;
  font-size: 0.75rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.preview-url {
  margin: 0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.12rem;
  font-weight: 600;
  color: #7dd3fc;
  word-break: break-all;
  line-height: 1.4;
}

.preview-url.is-placeholder {
  color: #64748b;
}

.preview-dns {
  margin: 0.65rem 0 0;
  padding-top: 0.65rem;
  border-top: 1px solid #1e293b;
  font-size: 0.8rem;
  color: #94a3b8;
  word-break: break-all;
}

.preview-dns.is-placeholder {
  color: #64748b;
  font-style: italic;
}

.preview-avail {
  margin: 0.6rem 0 0;
  min-height: 1.1rem;
  font-size: 0.8rem;
  font-weight: 500;
}

.preview-avail.ok { color: #4ade80; }
.preview-avail.err { color: #f87171; }

.side-rules {
  margin-top: 1.15rem;
  padding-top: 1.1rem;
  border-top: 1px solid #334155;
}

.side-rules .section-tag {
  margin-bottom: 0.65rem;
}

.rules-list {
  margin: 0;
  padding-left: 1.05rem;
  font-size: 0.8rem;
  color: #94a3b8;
  line-height: 1.55;
}

.rules-list li {
  margin-bottom: 0.45rem;
}

.rules-list li:last-child {
  margin-bottom: 0;
}

.rules-list li::marker {
  color: #38bdf8;
}

.field-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: #64748b;
  line-height: 1.45;
}

.success-panel {
  padding: 1.35rem 1.5rem;
}

.success-title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: #4ade80;
}

.success-msg {
  margin: 0 0 1rem;
  color: #94a3b8;
  font-size: 0.9rem;
}

.receipt {
  margin: 0 0 1rem;
  padding: 1rem;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #0a0f1a;
}

.receipt div {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 0.35rem 0.75rem;
  padding: 0.35rem 0;
}

.receipt div + div {
  border-top: 1px solid #1e293b;
}

.receipt dt {
  margin: 0;
  font-size: 0.75rem;
  color: #64748b;
}

.receipt dd {
  margin: 0;
  font-size: 0.88rem;
  color: #e2e8f0;
  word-break: break-all;
}

.receipt .mono {
  font-family: ui-monospace, Menlo, monospace;
  color: #7dd3fc;
}

.email-note {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  color: #fbbf24;
}

.email-note.ok {
  color: #4ade80;
}

.success-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-secondary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid #475569;
  background: #1e293b;
  color: #e2e8f0;
}

.btn-secondary:hover {
  border-color: #38bdf8;
  color: #7dd3fc;
}

.btn-ghost {
  background: transparent;
  color: #94a3b8;
}

.danger-zone {
  margin-top: 0.25rem;
}

.danger-tag {
  color: #f87171;
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid #7f1d1d;
  background: #450a0a;
  color: #fecaca;
}

.btn-danger:hover:not(:disabled) {
  border-color: #ef4444;
  background: #7f1d1d;
}

.btn-danger:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.auth-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-top: 0.85rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #0a0f1a;
  font-size: 0.88rem;
  color: #94a3b8;
}

.auth-bar strong {
  color: #e2e8f0;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.login-panel {
  padding: 1.25rem 1.5rem 1.5rem;
  border-top: 1px solid #334155;
}

.my-domains {
  margin-bottom: 0.5rem;
}

.domain-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.domain-list-btn {
  width: 100%;
  text-align: left;
  padding: 0.75rem 1rem;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #0a0f1a;
  color: #e2e8f0;
  cursor: pointer;
}

.domain-list-btn:hover {
  border-color: #38bdf8;
}

.domain-list-fqdn {
  display: block;
  font-weight: 600;
  color: #7dd3fc;
}

.domain-list-dns {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: #94a3b8;
}

.manage-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.manage-form {
  max-width: 480px;
}

.manage-form .field-full {
  margin-bottom: 0.85rem;
}

.current-box {
  margin: 1rem 0;
  padding: 1rem;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #0a0f1a;
}

.current-box.hidden {
  display: none;
}

.divider {
  border: none;
  border-top: 1px solid #334155;
  margin: 1.25rem 0;
}

.back-link {
  margin-top: 1.25rem;
  font-size: 0.88rem;
}

.back-link a {
  color: #7dd3fc;
}

.side-rules a {
  color: #7dd3fc;
}

@media (max-width: 720px) {
  .page {
    padding: 1rem 0.75rem 2rem;
  }

  .board-body {
    grid-template-columns: 1fr;
  }

  .board-main {
    border-right: none;
    border-bottom: 1px solid #334155;
  }

  .side-panel {
    padding: 1.15rem 1.2rem;
  }

  .preview-box {
    min-height: 120px;
  }

  .inline-fields {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .block-form-bottom .submit-btn {
    margin-top: 1rem;
  }
}