@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #2d5f8a;
  --primary-dark: #1e3a5f;
  --primary-light: #4a90c4;
  --accent: #e74c3c;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #3498db;
  --dark: #2c3e50;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --white: #ffffff;
  --shadow: 0 2px 10px rgba(0,0,0,0.08);
  --shadow-lg: 0 5px 25px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gray-100);
  color: var(--dark);
  line-height: 1.6;
  font-size: 14px;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ======== TOP BAR ======== */
.top-bar {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: white;
  padding: 8px 0;
  font-size: 13px;
}
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: rgba(255,255,255,0.85); margin-left: 18px; transition: var(--transition); }
.top-bar a:hover { color: white; }
.top-bar .welcome { font-weight: 500; }

/* ======== HEADER ======== */
.header {
  background: white;
  box-shadow: var(--shadow);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header .container {
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo { font-size: 24px; font-weight: 800; color: var(--primary-dark); }
.logo span { color: var(--accent); }

.search-box {
  flex: 1;
  max-width: 500px;
  position: relative;
}
.search-box input {
  width: 100%;
  padding: 10px 45px 10px 18px;
  border: 2px solid var(--gray-300);
  border-radius: 25px;
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}
.search-box input:focus { border-color: var(--primary); }
.search-box button {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  cursor: pointer;
  transition: var(--transition);
}
.search-box button:hover { background: var(--primary-dark); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 5px 10px;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  color: var(--gray-600);
  font-size: 12px;
}
.header-action:hover { background: var(--gray-100); color: var(--primary); }
.header-action i { font-size: 18px; }
.header-action .badge {
  position: absolute;
  top: 0;
  right: 2px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  width: 18px;
  height: 18px;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.user-widget {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}
.user-widget:hover { background: var(--gray-100); }
.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 16px;
}
.user-info { font-size: 12px; }
.user-info .name { font-weight: 600; color: var(--dark); }
.user-info .balance { color: var(--primary); font-weight: 700; }

/* ======== NAVIGATION ======== */
.main-nav {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 0;
}
.nav-links > li { position: relative; }
.nav-links > li > a {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 14px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links > li > a:hover,
.nav-links > li > a.active { color: var(--primary); background: var(--gray-100); }
.nav-links > li > a i.fa-chevron-down { font-size: 10px; margin-left: 3px; }

/* Dropdown */
.nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 220px;
  box-shadow: var(--shadow-lg);
  border-radius: 0 0 var(--radius) var(--radius);
  border: 1px solid var(--gray-200);
  z-index: 200;
  padding: 6px 0;
}
.nav-links > li:hover > .nav-dropdown { display: block; }
.nav-dropdown a {
  display: block;
  padding: 9px 18px;
  font-size: 13px;
  color: var(--gray-700);
  transition: var(--transition);
}
.nav-dropdown a:hover { background: var(--gray-100); color: var(--primary); }
.nav-dropdown a i { margin-right: 8px; width: 16px; text-align: center; }

.nav-contact {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 12px;
}
.nav-contact-item { display: flex; align-items: center; gap: 8px; }
.nav-contact-item i { font-size: 22px; color: var(--primary); }
.nav-contact-item .label { color: var(--gray-500); }
.nav-contact-item .value { font-weight: 600; color: var(--dark); }

/* ======== CONTAINER ======== */
.container { max-width: 1300px; margin: 0 auto; padding: 0 20px; }

/* ======== MAIN CONTENT ======== */
.main-content {
  display: flex;
  gap: 20px;
  padding: 20px 0;
}
.content-area { flex: 1; min-width: 0; }
.sidebar { width: 280px; flex-shrink: 0; }

/* ======== NOTICE BAR ======== */
.notice-bar {
  background: linear-gradient(135deg, #fff3cd, #ffeaa7);
  border-left: 4px solid var(--warning);
  padding: 12px 18px;
  margin-bottom: 20px;
  border-radius: var(--radius);
  font-size: 13px;
}
.notice-bar strong { color: var(--accent); }

/* ======== PRODUCT CARDS ======== */
.category-section { margin-bottom: 25px; }
.category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--radius) var(--radius) 0 0;
  color: white;
  font-weight: 600;
  font-size: 15px;
}
.category-header i { font-size: 18px; }

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.product-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-top: none;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  transition: var(--transition);
}
.product-card:hover { background: var(--gray-100); }
.product-card:last-child { border-radius: 0 0 var(--radius) var(--radius); }

.product-info { flex: 1; min-width: 0; }
.product-name {
  font-weight: 600;
  font-size: 15px;
  color: var(--dark);
  margin-bottom: 4px;
  display: block;
}
.product-name:hover { color: var(--primary); }
.product-desc {
  font-size: 12px;
  color: var(--gray-500);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-meta {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-top: 6px;
  font-size: 12px;
  color: var(--gray-500);
}
.product-meta .stock { color: var(--success); font-weight: 600; }
.product-meta .sold { color: var(--gray-500); }

.product-price-area {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.product-price {
  padding: 8px 20px;
  border: 2px solid var(--accent);
  border-radius: 25px;
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
}
.btn-buy {
  padding: 8px 22px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  border: none;
  border-radius: 25px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-buy:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(45,95,138,0.3); }

/* ======== SIDEBAR ======== */
.sidebar-widget {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}
.sidebar-widget-title {
  padding: 12px 16px;
  font-weight: 600;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-200);
}
.sidebar-widget-body { padding: 0; }
.sidebar-balance {
  padding: 20px;
  text-align: center;
}
.sidebar-balance .label { color: var(--gray-500); font-size: 13px; }
.sidebar-balance .amount {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-top: 5px;
}

.sidebar-cat-list { list-style: none; }
.sidebar-cat-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
  transition: var(--transition);
}
.sidebar-cat-list li a:hover { background: var(--gray-100); color: var(--primary); }
.sidebar-cat-list li a i { width: 16px; text-align: center; }

/* ======== BUTTONS ======== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #c0392b; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #219a52; }
.btn-warning { background: var(--warning); color: white; }
.btn-outline { background: transparent; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 30px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

/* ======== FORMS ======== */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 13px;
  color: var(--gray-700);
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
  font-family: inherit;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(45,95,138,0.1); }
textarea.form-control { min-height: 100px; resize: vertical; }
select.form-control { cursor: pointer; }

/* ======== TABLES ======== */
.table-responsive { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table th, table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
table th {
  background: var(--gray-100);
  font-weight: 600;
  color: var(--gray-700);
  white-space: nowrap;
}
table td { color: var(--gray-700); }
table tr:hover td { background: #f8f9ff; }

/* ======== CARDS ======== */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-body { padding: 20px; }
.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-100);
}

/* ======== MODAL ======== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(3px);
}
.modal-overlay.active { display: flex; }
.modal {
  background: white;
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 550px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s ease;
}
@keyframes modalIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 16px;
}
.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--gray-500);
  padding: 4px 8px;
  border-radius: var(--radius);
}
.modal-close:hover { background: var(--gray-100); color: var(--dark); }
.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ======== TOAST ======== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  padding: 14px 20px;
  border-radius: var(--radius);
  color: white;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
  min-width: 280px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--info); }
.toast.warning { background: var(--warning); }
@keyframes toastIn { from { opacity: 0; transform: translateX(50px); } to { opacity: 1; transform: translateX(0); } }

/* ======== FOOTER ======== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 40px 0 20px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}
.footer h4 {
  color: white;
  margin-bottom: 15px;
  font-size: 16px;
}
.footer a { color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer a:hover { color: white; }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 13px;
}
.footer-contact-item i { color: var(--primary-light); margin-top: 3px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links li a { font-size: 13px; display: flex; align-items: center; gap: 6px; }
.footer-links li a:hover { padding-left: 5px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
}

/* ======== PROFILE PAGE ======== */
.profile-layout {
  display: flex;
  gap: 20px;
}
.profile-sidebar {
  width: 280px;
  flex-shrink: 0;
}
.profile-content { flex: 1; min-width: 0; }
.profile-menu { list-style: none; }
.profile-menu li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--gray-700);
  border-left: 3px solid transparent;
  transition: var(--transition);
}
.profile-menu li a:hover,
.profile-menu li a.active {
  color: var(--primary);
  background: var(--gray-100);
  border-left-color: var(--primary);
}
.profile-menu li a i { width: 20px; text-align: center; }

.wallet-card {
  padding: 24px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.wallet-title { font-size: 18px; color: var(--gray-700); margin-bottom: 5px; }
.wallet-balance {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
}
.wallet-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}
.wallet-stat {
  padding: 15px;
  background: var(--gray-100);
  border-radius: var(--radius);
}
.wallet-stat .label { font-size: 12px; color: var(--gray-500); }
.wallet-stat .value { font-size: 18px; font-weight: 700; color: var(--dark); margin-top: 4px; }

/* ======== LOGIN/REGISTER ======== */
.auth-wrapper {
  display: flex;
  justify-content: center;
  padding: 60px 20px;
}
.auth-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  padding: 40px;
}
.auth-card h2 {
  text-align: center;
  margin-bottom: 8px;
  color: var(--dark);
}
.auth-card .subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: 30px;
  font-size: 13px;
}
.auth-links {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
}
.auth-links a { color: var(--primary); font-weight: 600; }

/* ======== PRODUCT DETAIL ======== */
.product-detail-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 30px;
}
.product-detail-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}
.product-detail-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--gray-500);
}
.product-detail-price {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 15px;
}
.product-detail-desc {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 20px;
  padding: 15px;
  background: var(--gray-100);
  border-radius: var(--radius);
}
.product-detail-actions { display: flex; gap: 12px; align-items: center; }

/* ======== PAGINATION ======== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 20px;
}
.pagination button, .pagination a {
  padding: 6px 12px;
  border: 1px solid var(--gray-300);
  background: white;
  border-radius: var(--radius);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--gray-700);
}
.pagination button:hover, .pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination button.active { background: var(--primary); color: white; border-color: var(--primary); }

/* ======== STATUS BADGES ======== */
.badge-status {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  display: inline-block;
}
.badge-live { background: #d4edda; color: #155724; }
.badge-sold { background: #cce5ff; color: #004085; }
.badge-pending { background: #fff3cd; color: #856404; }
.badge-completed { background: #d4edda; color: #155724; }
.badge-rejected { background: #f8d7da; color: #721c24; }

/* ======== TABS ======== */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 20px;
}
.tab-btn {
  padding: 10px 20px;
  background: none;
  border: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ======== EMPTY STATE ======== */
.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: var(--gray-500);
}
.empty-state i { font-size: 48px; margin-bottom: 15px; }
.empty-state p { font-size: 15px; }

/* ======== FLOATING SIDEBAR ======== */
.float-sidebar {
  position: fixed;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.float-sidebar a {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.float-sidebar a:hover { transform: scale(1.15); }
.float-sidebar .fb { background: #1877f2; }
.float-sidebar .zalo { background: #0068ff; }
.float-sidebar .tg { background: #0088cc; }
.float-sidebar .fav { background: var(--accent); }

/* ======== RECHARGE ======== */
.bank-info-card {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 20px;
}
.bank-info-card h3 { margin-bottom: 20px; font-size: 18px; }
.bank-info-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  font-size: 14px;
}
.bank-info-item .label { opacity: 0.8; }
.bank-info-item .value { font-weight: 600; }
.copy-btn {
  background: rgba(255,255,255,0.2);
  border: none;
  color: white;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  margin-left: 8px;
}
.copy-btn:hover { background: rgba(255,255,255,0.3); }

/* ======== RESPONSIVE ======== */
@media (max-width: 992px) {
  .main-content { flex-direction: column; }
  .sidebar { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .profile-layout { flex-direction: column; }
  .profile-sidebar { width: 100%; }
}
@media (max-width: 768px) {
  .header .container { flex-wrap: wrap; }
  .search-box { order: 3; max-width: 100%; flex-basis: 100%; }
  .nav-links { flex-wrap: wrap; }
  .nav-contact { display: none; }
  .wallet-stats { grid-template-columns: 1fr; }
  .product-card { flex-direction: column; align-items: flex-start; gap: 10px; }
  .product-price-area { width: 100%; justify-content: space-between; }
}