:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --surface-strong: #eef2f7;
  --text: #111827;
  --muted: #64748b;
  --border: #dbe3ec;
  --border-strong: #c9d4e2;
  --primary: #1f5eff;
  --primary-hover: #1749c8;
  --danger: #c2412d;
  --danger-hover: #9f321f;
  --accent: #0f766e;
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(180deg, #eef4fb 0, #f4f6f8 260px),
    var(--bg);
  color: var(--text);
}

main {
  width: min(1040px, calc(100% - 32px));
  margin: 32px auto;
}

button,
.primary-link,
.secondary-link-button {
  min-height: 40px;
  padding: 0 15px;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button {
  background: var(--primary);
  color: #ffffff;
}

button:hover {
  background: var(--primary-hover);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

pre {
  padding: 16px;
  overflow: auto;
  border-radius: 8px;
  background: #111827;
  color: #e5e7eb;
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 20px;
  padding: 24px 26px;
  border: 1px solid rgba(219, 227, 236, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1.15;
}

.page-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.toolbar,
.post-section,
.detail-panel,
.auth-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 34px rgba(15, 23, 42, 0.05);
}

.toolbar {
  margin-bottom: 18px;
  padding: 14px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.entry-card {
  min-height: 156px;
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
  text-decoration: none;
  box-shadow: 0 10px 34px rgba(15, 23, 42, 0.05);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.entry-card:hover,
.entry-card--active {
  border-color: #b9caf0;
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.09);
  transform: translateY(-1px);
}

.entry-card span {
  width: fit-content;
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  padding: 0 9px;
  border-radius: 999px;
  background: #eef4ff;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.entry-card strong {
  font-size: 22px;
  line-height: 1.25;
}

.entry-card small {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.entry-card--request span {
  background: #effaf8;
  color: var(--accent);
}

.filter-form {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.9fr 1.3fr auto auto;
  gap: 10px;
  align-items: center;
}

.primary-link,
.secondary-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  white-space: nowrap;
}

.primary-link {
  background: var(--primary);
  color: #ffffff;
}

.primary-link:hover {
  background: var(--primary-hover);
}

.secondary-button,
.secondary-link-button {
  background: #475569;
  color: #ffffff;
}

.secondary-button:hover,
.secondary-link-button:hover {
  background: #334155;
}

.text-link {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.text-link:hover,
.detail-link:hover {
  text-decoration: underline;
}

.listing-list {
  display: grid;
  gap: 14px;
}

.board-section {
  margin-top: 28px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 14px;
}

.section-heading h2 {
  margin: 0;
  font-size: 22px;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.listing-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 34px rgba(15, 23, 42, 0.05);
}

.listing-card--message {
  position: relative;
  padding: 22px 24px 18px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.92)),
    var(--surface);
}

.listing-card--message::before {
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 0;
  width: 4px;
  border-radius: 0 999px 999px 0;
  background: #2f6bff;
  content: "";
}

.listing-card--message:hover {
  border-color: #c7d7ee;
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
}

.request-card {
  border-color: #cde7df;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(242, 250, 247, 0.92)),
    var(--surface);
}

.request-card::before {
  background: var(--accent);
}

.listing-badge,
.request-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin-bottom: 8px;
  padding: 0 10px;
  border: 1px solid #c8d7ff;
  border-radius: 999px;
  background: #eef4ff;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
}

.request-badge {
  border-color: #b9dfd9;
  background: #effaf8;
  color: #0f766e;
}

.listing-card--with-image {
  display: grid;
  grid-template-columns: 246px 1fr;
  gap: 18px;
  padding: 14px;
}

.listing-card__media {
  display: block;
  min-height: 182px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--surface-strong);
  text-decoration: none;
}

.listing-image,
.listing-image-placeholder {
  width: 100%;
  height: 100%;
  min-height: 182px;
}

.listing-image {
  display: block;
  object-fit: cover;
  transition: transform 0.18s ease;
}

.listing-card__media:hover .listing-image {
  transform: scale(1.025);
}

.listing-image-placeholder,
.image-placeholder {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 14px;
}

.listing-card__body {
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 12px;
}

.listing-card__main {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.listing-card h2 {
  margin: 0 0 7px;
  font-size: 22px;
  line-height: 1.25;
}

.listing-meta {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.listing-price {
  white-space: nowrap;
  color: var(--danger);
  font-size: 21px;
}

.listing-card--message .listing-price {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid #f0c8bc;
  border-radius: 999px;
  background: #fff7f3;
  font-size: 18px;
}

.request-card .request-price {
  border-color: #b9dfd9;
  background: #effaf8;
  color: #0f766e;
}

.listing-description {
  margin: 0;
  color: #334155;
  font-size: 17px;
  line-height: 1.85;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.listing-description--featured {
  color: #172033;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.82;
}

.listing-details {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.listing-details div {
  padding: 10px 12px;
  border: 1px solid #edf1f6;
  border-radius: 8px;
  background: var(--surface-soft);
}

.listing-details dt {
  font-size: 12px;
  color: var(--muted);
}

.listing-details dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

.listing-contact {
  margin: 0;
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.listing-card__footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding-top: 2px;
}

.listing-card--message .listing-card__footer {
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px solid #edf1f6;
}

.listing-card--message .listing-contact {
  color: #334155;
  font-size: 15px;
}

.detail-link {
  width: fit-content;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.listing-card--message .detail-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid #c8d7ff;
  border-radius: 999px;
  background: #f5f8ff;
  text-decoration: none;
}

.empty-text {
  margin: 0;
  padding: 18px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
}

.post-section {
  padding: 18px;
}

.post-section--focused {
  max-width: 820px;
  margin-inline: auto;
}

.listing-form {
  display: grid;
  gap: 15px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.optional-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: #263445;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea {
  min-height: 136px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(31, 94, 255, 0.7);
  box-shadow: 0 0 0 4px rgba(31, 94, 255, 0.1);
}

.optional-fields {
  display: grid;
  gap: 14px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-soft);
}

.optional-fields summary {
  cursor: pointer;
  color: #172033;
  font-weight: 800;
}

.optional-fields[open] summary {
  margin-bottom: 14px;
}

.form-message {
  margin: 0;
  color: var(--primary);
  font-weight: 700;
  line-height: 1.6;
}

.auth-shell {
  min-height: calc(100vh - 64px);
  display: grid;
  place-items: center;
}

.auth-panel {
  width: min(430px, 100%);
  display: grid;
  gap: 18px;
  padding: 24px;
}

.auth-panel h1 {
  margin: 0;
}

.auth-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.image-preview-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.image-preview {
  display: grid;
  gap: 6px;
}

.image-preview img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 8px;
  background: var(--surface-strong);
}

.image-preview span {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(15, 23, 42, 0.62);
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-panel {
  width: min(520px, 100%);
  display: grid;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 22px 70px rgba(15, 23, 42, 0.24);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.modal-header h2 {
  margin: 0 0 6px;
  font-size: 22px;
}

.modal-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.icon-button {
  width: 36px;
  min-height: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
  background: var(--surface-strong);
  color: var(--text);
  font-size: 24px;
  line-height: 1;
}

.icon-button:hover {
  background: var(--border);
}

.modal-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.copy-message {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.admin-actions {
  display: flex;
  gap: 10px;
  margin-top: 2px;
  flex-wrap: wrap;
}

.admin-actions button {
  min-width: 76px;
}

.danger-button {
  background: var(--danger);
}

.danger-button:hover {
  background: var(--danger-hover);
}

.detail-content {
  display: grid;
  gap: 16px;
}

.detail-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.detail-images img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 8px;
  background: var(--surface-strong);
}

.image-placeholder {
  min-height: 260px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.detail-panel {
  padding: 22px;
}

.detail-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.detail-header h2 {
  margin: 0 0 7px;
  font-size: 24px;
}

.detail-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.detail-header strong {
  white-space: nowrap;
  color: var(--danger);
  font-size: 24px;
}

.detail-block {
  margin-top: 18px;
}

.detail-block h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.detail-block p {
  margin: 0;
  color: #334155;
  line-height: 1.8;
}

.contact-block {
  padding: 14px;
  border: 1px solid #b9dfd9;
  border-radius: 8px;
  background: #effaf8;
}

@media (max-width: 900px) {
  .entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filter-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .listing-card--with-image {
    grid-template-columns: 210px 1fr;
  }

  .optional-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  body {
    background: var(--bg);
  }

  main {
    width: min(100% - 24px, 560px);
    margin: 18px auto;
  }

  .page-header {
    display: grid;
    padding: 20px;
  }

  .section-heading {
    display: grid;
  }

  .page-header h1 {
    font-size: 26px;
  }

  .header-actions,
  .modal-actions,
  .admin-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-link,
  .secondary-link-button,
  .header-actions button,
  .admin-actions button {
    width: 100%;
  }

  .filter-form,
  .entry-grid,
  .form-grid,
  .optional-grid,
  .listing-details,
  .detail-images {
    grid-template-columns: 1fr;
  }

  .listing-card--with-image {
    grid-template-columns: 1fr;
  }

  .listing-card__main,
  .listing-card__footer,
  .detail-header {
    display: grid;
  }

  .listing-description {
    font-size: 16px;
  }

  .listing-description--featured {
    font-size: 17px;
  }

  .listing-card--message {
    padding: 20px 18px 16px 20px;
  }

  .listing-card--message .listing-card__main {
    align-items: start;
    gap: 10px;
  }

  .listing-card--message .listing-price {
    width: fit-content;
  }

  .listing-card__media,
  .listing-image,
  .listing-image-placeholder {
    min-height: 226px;
  }

  .detail-images img {
    height: 260px;
  }

  .image-preview-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 420px) {
  main {
    width: 100%;
    margin: 0;
    padding: 12px;
  }

  .page-header,
  .toolbar,
  .post-section,
  .detail-panel,
  .auth-panel,
  .listing-card {
    border-radius: 8px;
  }
}