/* =============================================
   SELLER SUPER HUB - DESIGN SYSTEM
   ============================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #0a0a0f;
  --bg-2: #111118;
  --bg-3: #1a1a24;
  --card: rgba(255,255,255,0.04);
  --card-hover: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.08);
  --border-active: rgba(255,255,255,0.18);

  --cyan: #00d4ff;
  --cyan-dim: rgba(0,212,255,0.15);
  --cyan-glow: rgba(0,212,255,0.3);
  --violet: #7c3aed;
  --violet-dim: rgba(124,58,237,0.15);
  --green: #00e676;
  --green-dim: rgba(0,230,118,0.12);
  --red: #ff4757;
  --red-dim: rgba(255,71,87,0.12);
  --amber: #ffa502;
  --amber-dim: rgba(255,165,2,0.12);

  --text: #f0f0f8;
  --text-2: #a0a0b8;
  --text-3: #606078;

  --sidebar-w: 240px;
  --topbar-h: 60px;
  --bottombar-h: 65px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --transition: 0.2s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { height: 100%; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100%;
  overflow: hidden;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-active); border-radius: 99px; }

/* =============================================
   LAYOUT
   ============================================= */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ===== SIDEBAR (Desktop) ===== */
.sidebar {
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
}

.sidebar-logo {
  padding: 20px 16px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  margin-bottom: 8px;
}
.sidebar-logo h1 {
  font-size: 14px; font-weight: 700;
  color: var(--text); line-height: 1.2;
}
.sidebar-logo span {
  font-size: 11px; color: var(--text-2); font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-section-label {
  font-size: 10px; font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 8px 8px 4px;
  margin-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
}
.nav-item .nav-icon { font-size: 16px; flex-shrink: 0; width: 20px; text-align: center; }
.nav-item .nav-label { flex: 1; }
.nav-item:hover { background: var(--card); color: var(--text); }
.nav-item.active {
  background: var(--cyan-dim);
  border-color: rgba(0,212,255,0.2);
  color: var(--cyan);
}

/* ===== MAIN AREA ===== */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ===== TOPBAR (Mobile only) ===== */
.topbar {
  display: none;
  height: var(--topbar-h);
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 50;
}
.topbar-logo { font-size: 15px; font-weight: 700; flex: 1; }
.topbar-logo span { color: var(--cyan); }
.topbar-page-title { font-size: 14px; color: var(--text-2); }

/* ===== PAGES ===== */
.pages {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.page {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: 28px;
  display: none;
  animation: fadeIn 0.2s ease;
}
.page.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== BOTTOM NAV (Mobile only) ===== */
.bottom-nav {
  display: none;
  height: var(--bottombar-h);
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 0 4px;
  align-items: stretch;
  flex-shrink: 0;
  z-index: 100;
}
.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  margin: 6px 2px;
  transition: all var(--transition);
  color: var(--text-3);
  font-size: 11px;
  font-weight: 500;
  border: none;
  background: transparent;
  padding: 0 2px;
}
.bottom-nav-item .bn-icon { font-size: 20px; line-height: 1; }
.bottom-nav-item.active { color: var(--cyan); }
.bottom-nav-item.active .bn-icon { filter: drop-shadow(0 0 6px var(--cyan)); }

/* "More" popup */
.more-menu {
  display: none;
  position: fixed;
  bottom: calc(var(--bottombar-h) + 8px);
  left: 8px; right: 8px;
  background: var(--bg-3);
  border: 1px solid var(--border-active);
  border-radius: var(--radius);
  padding: 8px;
  z-index: 200;
  box-shadow: var(--shadow);
}
.more-menu.open { display: block; }
.more-menu-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-2);
  font-size: 14px; font-weight: 500;
  transition: all var(--transition);
}
.more-menu-item:hover, .more-menu-item.active { background: var(--cyan-dim); color: var(--cyan); }
.more-menu-item .mi-icon { font-size: 18px; }

/* =============================================
   COMPONENTS
   ============================================= */

/* Page header */
.page-header {
  margin-bottom: 24px;
}
.page-header h2 {
  font-size: 22px; font-weight: 700;
  color: var(--text);
}
.page-header p {
  font-size: 13px; color: var(--text-2); margin-top: 4px;
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition);
}
.card:hover { border-color: var(--border-active); }

.card-title {
  font-size: 13px; font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* Stats */
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}
.stat-card.danger::before { background: var(--red); }
.stat-card.success::before { background: var(--green); }
.stat-card.neutral::before { background: var(--cyan); }
.stat-card.amber::before { background: var(--amber); }

.stat-label { font-size: 12px; font-weight: 500; color: var(--text-2); margin-bottom: 8px; }
.stat-value {
  font-size: 36px; font-weight: 800; line-height: 1;
  letter-spacing: -1px;
}
.stat-card.danger .stat-value { color: var(--red); }
.stat-card.success .stat-value { color: var(--green); }
.stat-card.neutral .stat-value { color: var(--cyan); }
.stat-card.amber .stat-value { color: var(--amber); }
.stat-icon {
  position: absolute;
  right: 16px; top: 16px;
  font-size: 28px;
  opacity: 0.15;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13.5px; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  font-family: inherit;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #00b4d8, var(--cyan));
  color: #000;
  border-color: transparent;
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-danger {
  background: var(--red-dim);
  color: var(--red);
  border-color: rgba(255,71,87,0.3);
}
.btn-danger:hover { background: var(--red); color: #fff; }
.btn-ghost {
  background: var(--card);
  color: var(--text-2);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--card-hover); color: var(--text); border-color: var(--border-active); }
.btn-success {
  background: var(--green-dim);
  color: var(--green);
  border-color: rgba(0,230,118,0.3);
}
.btn-success:hover { background: var(--green); color: #000; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; filter: none !important; }

/* File Upload */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--cyan);
  background: var(--cyan-dim);
}
.upload-zone input[type="file"] {
  position: absolute; inset: 0;
  opacity: 0; cursor: pointer;
  width: 100%; height: 100%;
}
.upload-zone-icon { font-size: 32px; margin-bottom: 10px; display: block; }
.upload-zone h4 { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.upload-zone p { font-size: 12px; color: var(--text-2); }
.upload-zone .file-name {
  margin-top: 8px;
  font-size: 12px;
  color: var(--cyan);
  font-weight: 600;
  background: var(--cyan-dim);
  padding: 4px 10px;
  border-radius: 99px;
  display: inline-block;
}

/* File upload row (compact) */
.upload-row {
  display: flex; align-items: center; gap: 10px;
}
.upload-row input[type="file"] {
  flex: 1;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
}
.upload-row input[type="file"]::file-selector-button {
  background: var(--card-hover);
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
  margin-right: 8px;
}

/* Status Banner */
.status-banner {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  display: flex; align-items: center; gap: 8px;
  margin-top: 10px;
  display: none;
}
.status-banner.show { display: flex; }
.status-banner.success { background: var(--green-dim); color: var(--green); border: 1px solid rgba(0,230,118,0.2); }
.status-banner.error { background: var(--red-dim); color: var(--red); border: 1px solid rgba(255,71,87,0.2); }
.status-banner.info { background: var(--cyan-dim); color: var(--cyan); border: 1px solid rgba(0,212,255,0.2); }

/* Scanner Area */
.scanner-zone {
  background: var(--bg-3);
  border: 2px solid var(--cyan);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: 0 0 30px var(--cyan-glow);
  position: relative;
}
.scanner-title {
  font-size: 13px; font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.barcode-input-wrap {
  display: flex; gap: 8px; align-items: center;
}
.barcode-input {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--border-active);
  color: var(--text);
  font-size: clamp(18px, 3.5vw, 28px);
  font-family: 'Courier New', monospace;
  font-weight: 700;
  text-align: center;
  padding: 8px 4px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
}
.barcode-input:focus { border-bottom-color: var(--cyan); }
.barcode-input::placeholder { color: var(--text-3); font-size: 14px; font-family: inherit; font-weight: 400; }

.scan-feedback {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  background: var(--bg-2);
  min-height: 44px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.3s;
}
.scan-feedback.idle { color: var(--text-3); }
.scan-feedback.success { background: var(--green-dim); color: var(--green); border: 1px solid rgba(0,230,118,0.2); }
.scan-feedback.error { background: var(--red-dim); color: var(--red); border: 1px solid rgba(255,71,87,0.2); }
.scan-feedback.warning { background: var(--amber-dim); color: var(--amber); border: 1px solid rgba(255,165,2,0.2); }

/* QR Camera area */
#qr-reader, #qr-reader-failed {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  margin-top: 12px;
}
#qr-reader button, #qr-reader-failed button {
  background: var(--card-hover);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: 6px;
  margin: 8px;
  cursor: pointer;
  font-family: inherit;
}
#qr-reader select, #qr-reader-failed select {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 6px;
  margin: 8px;
  font-family: inherit;
}
#qr-reader a, #qr-reader-failed a { display: none !important; }

/* Recent scan list */
.scan-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.scan-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px;
  background: var(--bg-3);
  border-radius: var(--radius-sm);
  font-size: 13px;
  border: 1px solid var(--border);
}
.scan-list .scan-code { font-family: monospace; font-weight: 600; color: var(--text); }
.scan-list .scan-time { color: var(--green); font-size: 12px; }
.scan-list .empty { color: var(--text-3); text-align: center; padding: 20px; display: block; width: 100%; }

/* Tables */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table th {
  padding: 12px 14px;
  background: var(--bg-3);
  color: var(--text-2);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  position: sticky; top: 0; z-index: 5;
}
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--text);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--card-hover); }
.data-table .mono { font-family: monospace; font-weight: 600; font-size: 12px; color: var(--cyan); }
.data-table .sub { display: block; font-size: 11px; color: var(--text-2); margin-top: 3px; }
.data-table .amount { color: var(--amber); font-weight: 600; }

/* Badges */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.badge-red { background: var(--red-dim); color: var(--red); border: 1px solid rgba(255,71,87,0.3); }
.badge-green { background: var(--green-dim); color: var(--green); border: 1px solid rgba(0,230,118,0.3); }
.badge-cyan { background: var(--cyan-dim); color: var(--cyan); border: 1px solid rgba(0,212,255,0.3); }
.badge-amber { background: var(--amber-dim); color: var(--amber); border: 1px solid rgba(255,165,2,0.3); }

/* Search input */
.search-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px 10px 38px;
  color: var(--text);
  font-size: 13.5px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--cyan); }
.search-wrap { position: relative; }
.search-wrap::before {
  content: '🔍';
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  pointer-events: none;
}

/* PDF dropzone */
.pdf-dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.pdf-dropzone input[type="file"] {
  position: absolute; inset: 0;
  opacity: 0; cursor: pointer;
  width: 100%; height: 100%;
}
.pdf-dropzone:hover, .pdf-dropzone.drag-over {
  border-color: var(--violet);
  background: var(--violet-dim);
}
.pdf-dropzone.has-files { border-color: var(--cyan); background: var(--cyan-dim); }
.pdf-dropzone-icon { font-size: 40px; }
.pdf-dropzone h4 { font-size: 15px; font-weight: 600; color: var(--text); }
.pdf-dropzone p { font-size: 12px; color: var(--text-2); }
.pdf-file-badge {
  background: var(--cyan-dim);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 12px; font-weight: 700;
  display: inline-flex; align-items: center; gap: 6px;
}

/* Code tags */
.code-tag {
  display: inline-block;
  background: var(--red-dim);
  color: var(--red);
  border: 1px solid rgba(255,71,87,0.2);
  border-radius: 6px;
  padding: 4px 8px;
  font-family: monospace;
  font-size: 12px;
  margin: 3px;
}

/* Spinner */
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-wrap {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; padding: 48px;
}
.loader-wrap p { color: var(--text-2); font-size: 13px; }

/* Divider */
.divider { height: 1px; background: var(--border); margin: 20px 0; }

/* =============================================
   RESPONSIVE - MOBILE FIRST
   ============================================= */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .topbar { display: flex; }
  .bottom-nav { display: flex; }

  .page { padding: 16px 14px; }
  .page-header { margin-bottom: 16px; }
  .page-header h2 { font-size: 18px; }

  .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 12px; }

  .stat-value { font-size: 28px; }

  .barcode-input { font-size: 20px; }

  .upload-row { flex-direction: column; }
  .upload-row .btn { width: 100%; justify-content: center; }

  .data-table th, .data-table td { padding: 10px 10px; font-size: 12px; }

  /* Hide less important columns on mobile */
  .data-table .col-hide-mobile { display: none; }
}

@media (min-width: 769px) {
  .more-menu { display: none !important; }
}