:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --primary: #1a73e8;
  --accent: #ffc857;
  --text: #1f2937;
  --muted: #6b7280;
  --danger: #dc2626;
  --success: #15803d;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--panel);
  border-bottom: 1px solid #e5e7eb;
}

.topbar {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1rem;
}

.brand {
  font-size: 1.4rem;
  font-weight: 700;
}

.brand span {
  color: var(--primary);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.nav a {
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
}

.nav a.active,
.nav a:hover {
  background: #e7f0ff;
  color: var(--primary);
}

.btn {
  border: 1px solid #d1d5db;
  background: #fff;
  color: var(--text);
  padding: 0.5rem 0.9rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn.sell {
  background: var(--accent);
  border-color: #eab308;
}

.btn.buy {
  background: #16a34a;
  border-color: #15803d;
  color: #fff;
}

.btn.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn.small {
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.2rem 1rem 3rem;
}

.hero {
  background: linear-gradient(135deg, #1a73e8, #65a7ff);
  border-radius: 16px;
  color: #fff;
  padding: 2rem;
  margin-bottom: 1rem;
}

.hero h1 {
  margin-bottom: 0.5rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.products {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 1rem;
}

.card {
  background: var(--panel);
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 1rem;
}

.card h3 {
  margin-bottom: 0.3rem;
}

.product-image {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 0.7rem;
}

.muted {
  color: var(--muted);
}

.price {
  margin: 0.5rem 0 0.8rem;
  font-weight: 700;
}

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

.cart-panel,
.panel {
  background: var(--panel);
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 1rem;
  margin-top: 1rem;
}

.list {
  display: grid;
  gap: 0.7rem;
  margin-top: 0.8rem;
}

.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid #edf0f5;
  border-radius: 10px;
  padding: 0.7rem;
}

.footer-nav {
  position: sticky;
  bottom: 0;
  background: var(--panel);
  border-top: 1px solid #e5e7eb;
}

.footer-nav .nav {
  max-width: 700px;
  margin: 0 auto;
  justify-content: space-around;
  padding: 0.6rem 0.5rem;
}

.landing {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.landing-card {
  max-width: 520px;
  background: var(--panel);
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
}

.landing-actions {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 1rem;
}

.form {
  display: grid;
  gap: 0.8rem;
}

.input {
  padding: 0.65rem;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
}

.profile-page {
  background: #e8d39d;
}

.profile-shell {
  max-width: 420px;
  margin: 0 auto;
  min-height: 100vh;
  background: #edd8a6;
  padding-bottom: 4rem;
}

.profile-head {
  background: #fff;
  padding: 0.8rem;
  text-align: center;
  border-bottom: 1px solid #e7e7e7;
}

.ticker {
  background: #f7be23;
  font-size: 0.9rem;
  padding: 0.5rem;
}

.wallet {
  margin: 1rem;
  background: linear-gradient(135deg, #9ad1ff, #00a6eb);
  color: #062f4f;
  border-radius: 14px;
  padding: 1rem;
}

.wallet .split {
  display: flex;
  justify-content: space-between;
  margin-top: 1rem;
  font-weight: 700;
}

.menu-box {
  margin: 0 1rem;
  display: grid;
  gap: 0.6rem;
}

.menu-btn {
  background: #e9f1ff;
  border: 1px solid #dbeafe;
  border-radius: 10px;
  padding: 0.8rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.chat {
  margin: 1rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 0.8rem;
}

.profile-panel {
  display: none;
}

.profile-panel.active-panel {
  display: block;
}

#profileRecordList .list-item {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
}

.badge {
  background: #dbeafe;
  color: #1d4ed8;
  padding: 0.18rem 0.4rem;
  border-radius: 12px;
  font-size: 0.75rem;
}

.notice {
  margin-top: 0.5rem;
  color: var(--success);
  font-weight: 600;
}

.wallet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
  margin-top: 0.8rem;
}

.wallet-stat {
  background: #eef5ff;
  border: 1px solid #dbeafe;
  border-radius: 10px;
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.hidden {
  display: none !important;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: grid;
  place-items: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-content {
  width: min(480px, 100%);
  background: #fff;
  border-radius: 14px;
  border: 1px solid #dbe5f0;
  padding: 1rem;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
}

@media (min-width: 1200px) {
  .container,
  .topbar {
    max-width: 1240px;
  }

  .products {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }

  .product-image {
    height: 180px;
  }
}

@media (max-width: 900px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.2rem;
    scrollbar-width: thin;
  }

  .container {
    padding: 1rem 0.8rem 2.5rem;
  }

  .hero {
    padding: 1.4rem;
  }

  .products {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .list-item {
    flex-wrap: wrap;
    gap: 0.4rem;
  }
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand {
    font-size: 1.2rem;
  }

  .landing-card {
    padding: 1.2rem;
  }

  .landing-actions {
    flex-direction: column;
  }

  .landing-actions .btn,
  .form .btn {
    width: 100%;
  }

  .hero {
    border-radius: 12px;
    padding: 1rem;
  }

  .hero h1 {
    font-size: 1.3rem;
  }

  .card,
  .panel,
  .cart-panel {
    padding: 0.8rem;
    border-radius: 12px;
  }

  .products {
    grid-template-columns: 1fr;
  }

  .product-image {
    height: 190px;
  }

  .actions .btn {
    flex: 1 1 100%;
  }

  .wallet-grid {
    grid-template-columns: 1fr;
  }

  .modal {
    padding: 0.6rem;
  }

  .modal-content {
    max-height: 90vh;
    overflow-y: auto;
  }
}

@media (max-width: 420px) {
  .container {
    padding: 0.8rem 0.55rem 2rem;
  }

  .nav a,
  .btn.small {
    font-size: 0.82rem;
  }

  .product-image {
    height: 170px;
  }
}