/* CashDrop Design System */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --green: #00E676;
  --green-dim: #00C853;
  --green-bg: rgba(0, 230, 118, 0.08);
  --green-border: rgba(0, 230, 118, 0.2);
  --dark: #0A0A0A;
  --dark-card: #141414;
  --dark-border: #1E1E1E;
  --dark-hover: #1A1A1A;
  --text: #FAFAFA;
  --text-dim: #A0A0A0;
  --text-muted: #666;
  --gold: #FFD740;
  --red: #FF5252;
  --blue: #448AFF;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--dark);
  color: var(--text);
  overflow-x: hidden;
  min-height: 100vh;
}

h1, h2, h3, h4 { font-family: 'Space Grotesk', sans-serif; }

a { color: var(--green); text-decoration: none; }
a:hover { color: var(--green-dim); }

/* NAV */
.app-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  max-width: 1200px;
  margin: 0 auto;
  border-bottom: 1px solid var(--dark-border);
}
.app-nav .logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--green);
  letter-spacing: -0.5px;
}
.app-nav .logo span { color: var(--text); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-links a {
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--green); }

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary {
  background: var(--green);
  color: var(--dark);
}
.btn-primary:hover {
  background: var(--green-dim);
  color: var(--dark);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--dark-border);
}
.btn-secondary:hover {
  border-color: var(--text-dim);
  background: var(--dark-hover);
}
.btn-danger {
  background: transparent;
  color: var(--red);
  border: 1px solid rgba(255, 82, 82, 0.3);
}
.btn-danger:hover {
  background: rgba(255, 82, 82, 0.1);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}
.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* CONTAINER */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 48px;
}
.container-sm {
  max-width: 500px;
  margin: 0 auto;
  padding: 60px 24px;
}

/* PAGE HEADER */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}
.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.page-subtitle {
  color: var(--text-dim);
  font-size: 1rem;
  margin-top: 8px;
}

/* CARDS */
.card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s;
}
.card:hover { border-color: rgba(255,255,255,0.1); }
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

/* PRODUCT GRID */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.25s;
  cursor: pointer;
}
.product-card:hover {
  border-color: var(--green-border);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 230, 118, 0.06);
}
.product-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--dark-hover);
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-card-img .placeholder-icon {
  font-size: 3rem;
  opacity: 0.3;
}
.product-card-body {
  padding: 20px;
}
.product-card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-card-price {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--green);
}
.product-card-seller {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 8px;
}

/* FORMS */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--dark);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  transition: border-color 0.2s;
  outline: none;
}
.form-input:focus {
  border-color: var(--green);
}
.form-input::placeholder {
  color: var(--text-muted);
}
textarea.form-input {
  min-height: 100px;
  resize: vertical;
}

/* FILE UPLOAD */
.file-upload {
  border: 2px dashed var(--dark-border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.file-upload:hover {
  border-color: var(--green-border);
  background: var(--green-bg);
}
.file-upload input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.file-upload-icon {
  font-size: 2rem;
  margin-bottom: 8px;
  opacity: 0.5;
}
.file-upload-text {
  color: var(--text-dim);
  font-size: 0.9rem;
}
.file-upload-preview {
  max-height: 200px;
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

/* STAT CARDS */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}
.stat-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  padding: 24px;
}
.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.stat-card .stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
}
.stat-card .stat-value.green { color: var(--green); }
.stat-card .stat-value.gold { color: var(--gold); }

/* STATUS BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-active {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}
.badge-sold {
  background: rgba(68, 138, 255, 0.1);
  color: var(--blue);
  border: 1px solid rgba(68, 138, 255, 0.2);
}
.badge-instant {
  background: rgba(255, 215, 64, 0.1);
  color: var(--gold);
  border: 1px solid rgba(255, 215, 64, 0.2);
}
.badge-pending {
  background: rgba(160, 160, 160, 0.1);
  color: var(--text-dim);
  border: 1px solid var(--dark-border);
}
.badge-paid {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}

/* TABLE */
.data-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--dark-border);
}
.data-table td {
  padding: 16px;
  border-bottom: 1px solid var(--dark-border);
  font-size: 0.9rem;
}
.data-table tr:last-child td {
  border-bottom: none;
}

/* AUTH FORMS */
.auth-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.auth-card h2 {
  font-size: 1.8rem;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.auth-card .subtitle {
  color: var(--text-dim);
  margin-bottom: 32px;
}
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--dark-border);
}
.auth-tab {
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: 'DM Sans', sans-serif;
}
.auth-tab.active {
  color: var(--green);
  border-bottom-color: var(--green);
}
.auth-tab:hover {
  color: var(--text);
}

/* ALERTS */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 20px;
}
.alert-error {
  background: rgba(255, 82, 82, 0.1);
  border: 1px solid rgba(255, 82, 82, 0.2);
  color: var(--red);
}
.alert-success {
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  color: var(--green);
}

/* EMPTY STATE */
.empty-state {
  text-align: center;
  padding: 80px 40px;
}
.empty-state-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.3;
}
.empty-state h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}
.empty-state p {
  color: var(--text-dim);
  margin-bottom: 24px;
}

/* ITEM DETAIL */
.item-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.item-image {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
}
.item-image img {
  width: 100%;
  display: block;
}
.item-image .placeholder {
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  opacity: 0.2;
}
.item-info h1 {
  font-size: 2rem;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.item-price {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 16px;
}
.item-seller {
  color: var(--text-dim);
  margin-bottom: 24px;
  font-size: 0.95rem;
}
.item-description {
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* CHECKOUT MODAL */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.modal {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 90%;
  max-width: 460px;
  transform: translateY(20px);
  transition: transform 0.2s;
}
.modal-overlay.active .modal {
  transform: translateY(0);
}
.modal h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}
.modal .subtitle {
  color: var(--text-dim);
  margin-bottom: 24px;
  font-size: 0.9rem;
}

/* PAYOUT ANIMATION */
.payout-pulse {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.payout-pulse .dot {
  width: 8px;
  height: 8px;
  background: var(--gold);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* LOADING */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--dark-border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* FOOTER */
.app-footer {
  border-top: 1px solid var(--dark-border);
  padding: 24px 48px;
  max-width: 1200px;
  margin: 80px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.app-footer .logo-sm {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--green);
}
.app-footer .logo-sm span { color: var(--text); }
.app-footer .copy {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .app-nav { padding: 16px 20px; }
  .nav-links { gap: 16px; }
  .container { padding: 24px 20px; }
  .container-sm { padding: 40px 20px; }
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
  .item-detail { grid-template-columns: 1fr; gap: 24px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 16px; }
  .app-footer { padding: 20px; flex-direction: column; gap: 8px; }
  .auth-card { padding: 24px; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
}