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

:root {
  --bg: #0a0a14;
  --bg-card: #13132b;
  --bg-panel: #0f1a30;
  --text: #e0e0e0;
  --text-muted: #6b6b8d;
  --accent: #00d4ff;
  --accent2: #0a2a5e;
  --green: #00e676;
  --red: #ff5252;
  --orange: #ffab40;
  --yellow: #ffd740;
  --border: #1e1e4a;
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===================================================================
   LOGIN SCREEN
   =================================================================== */
.login-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0a0a1a 0%, #0a2a5e 100%);
  padding: 20px;
}

.login-box {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 40px 30px;
  width: 100%;
  max-width: 380px;
  border: 1px solid var(--border);
  text-align: center;
}

.login-logo { font-size: 3.5rem; margin-bottom: 10px; }
.login-box h1 { font-size: 1.4rem; color: #fff; margin-bottom: 4px; }
.login-subtitle { color: var(--accent); font-size: 0.85rem; margin-bottom: 30px; }

.login-field {
  text-align: left;
  margin-bottom: 18px;
}
.login-field label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}
.login-field input {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: border 0.2s;
}
.login-field input:focus {
  border-color: var(--accent);
  background: rgba(0,212,255,0.05);
}
.login-field input::placeholder { color: #444; }

.login-btn {
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 8px;
  transition: all 0.2s;
}
.login-btn:hover { background: #4de8ff; transform: scale(1.01); }
.login-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.login-error {
  color: var(--red);
  font-size: 0.85rem;
  margin-top: 12px;
  min-height: 20px;
}

/* ===================================================================
   HEADER
   =================================================================== */
header {
  background: linear-gradient(135deg, #0a2a5e, #13132b);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left { display: flex; align-items: center; gap: 10px; }
.header-left h1 { font-size: 1.1rem; color: #fff; }
.subtitle { color: var(--accent); font-size: 0.7rem; display: block; margin-top: 1px; }

.menu-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  padding: 4px 8px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.update-info { color: var(--text-muted); font-size: 0.75rem; }
.btn-refresh, .btn-logout {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  color: #fff;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
}
.btn-refresh:hover { background: var(--accent); color: #000; }
.btn-logout:hover { background: var(--red); color: #fff; }

/* ===================================================================
   TABS
   =================================================================== */
.tab-nav {
  display: flex;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 56px;
  z-index: 99;
}
.tab-btn {
  flex: 1;
  padding: 10px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-labels {
  display: flex;
  background: var(--bg);
  font-size: 0.7rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.tab-label {
  flex: 1;
  padding: 0 0 6px;
  color: var(--text-muted);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.tab-label.active { color: var(--accent); }

.tab-content { display: none; padding: 12px; }
.tab-content.active { display: block; }

/* ===================================================================
   LOADING BAR
   =================================================================== */
.loading-bar {
  height: 2px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}
.loading-bar.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 50%;
  height: 100%;
  background: var(--accent);
  animation: loadingSlide 1s ease infinite;
}
@keyframes loadingSlide {
  0% { left: -50%; }
  100% { left: 100%; }
}

/* ===================================================================
   CARDS
   =================================================================== */
.cards-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
}
.card-icon { font-size: 1.6rem; }
.card-content { display: flex; flex-direction: column; min-width: 0; }
.card-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }
.card-value { font-size: 1.2rem; font-weight: 700; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-sales .card-value { color: var(--green); }
.card-discounts .card-value { color: var(--orange); }
.card-products .card-value { color: var(--accent); }
.card-cashiers .card-value { color: var(--yellow); }
.card-profit .card-value { color: #bb86fc; }
.card-sublabel { font-size: 0.6rem; color: var(--text-muted); margin-top: 1px; }

/* ===================================================================
   PANELS
   =================================================================== */
.panel {
  background: var(--bg-panel);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 14px;
}
.panel-header {
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.panel-header h2 { font-size: 0.85rem; color: #fff; }
.badge {
  background: var(--accent2);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.65rem;
  font-weight: 600;
}
.btn-sm {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.7rem;
  transition: all 0.2s;
}
.btn-sm:hover { color: #fff; border-color: var(--accent); }
.btn-sm.active, .btn-sm[class*="active"] {
  background: var(--accent2);
  border-color: var(--accent);
  color: var(--accent);
}

/* Stock filter/sort buttons */
.stock-filter, .stock-sort {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.65rem;
  transition: all 0.2s;
}
.stock-filter:hover, .stock-sort:hover { color: #fff; }
.stock-filter.active, .stock-sort.active {
  background: var(--accent2);
  border-color: var(--accent);
  color: var(--accent);
}

/* ===================================================================
   TABLES
   =================================================================== */
.table-responsive { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.data-table th {
  background: rgba(0,0,0,0.2);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.6rem;
  letter-spacing: 0.5px;
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(42,42,74,0.3);
  color: var(--text);
}
.data-table tr:last-child td { border-bottom: none; }
.loading-msg { text-align: center; padding: 24px !important; color: var(--text-muted); }

/* Status */
.status-open { color: var(--green); font-weight: 600; }
.status-closed { color: var(--text-muted); }
.status-cancelled { color: var(--red); }
.value-positive { color: var(--green); }
.value-negative { color: var(--red); }
.value-money { font-family: 'Courier New', monospace; font-weight: 600; font-size: 0.85rem; }

/* Progress bar on products */
.progress-bar {
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  margin-top: 3px;
}
.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.5s ease;
}

/* ===================================================================
   GRID
   =================================================================== */
.grid-2cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

/* ===================================================================
   FINANCE
   =================================================================== */
.finance-summary { padding: 14px; }
.finance-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.finance-item:last-child { border-bottom: none; }
.finance-label { color: var(--text-muted); font-size: 0.8rem; }
.finance-value { font-weight: 600; font-family: 'Courier New', monospace; font-size: 0.9rem; }
.finance-value.highlight { color: var(--green); font-size: 1rem; }

/* ===================================================================
   STORAGE
   =================================================================== */
.storage-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  padding: 14px;
}
.storage-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}
.storage-card:hover, .storage-card.active {
  border-color: var(--accent);
  background: rgba(0,212,255,0.05);
}
.storage-card-icon { font-size: 1.8rem; margin-bottom: 6px; }
.storage-card-name { font-size: 0.85rem; font-weight: 600; color: #fff; }
.storage-card-detail { font-size: 0.7rem; color: var(--text-muted); margin-top: 4px; }

.search-box {
  padding: 10px 14px;
}
.search-box input {
  width: 100%;
  padding: 10px 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: #fff;
  font-size: 0.9rem;
  outline: none;
}
.search-box input:focus { border-color: var(--accent); }
.search-box input::placeholder { color: #555; }

.low-stock { color: var(--orange); font-weight: 600; }
.out-of-stock { color: var(--red); font-weight: 600; }

/* ===================================================================
   FOOTER
   =================================================================== */
footer {
  text-align: center;
  padding: 16px;
  color: var(--text-muted);
  font-size: 0.7rem;
  border-top: 1px solid var(--border);
}

/* ===================================================================
   RESPONSIVE - TABLETS
   =================================================================== */
@media (min-width: 600px) {
  .cards-row { grid-template-columns: repeat(4, 1fr); }
  .grid-2cols { grid-template-columns: 1fr 1fr; }
  .header-left h1 { font-size: 1.3rem; }
  .tab-btn { font-size: 1rem; padding: 12px; }
  .tab-label { font-size: 0.75rem; }
  .card-value { font-size: 1.4rem; }
  .storage-list { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}

/* ===================================================================
   RESPONSIVE - DESKTOP
   =================================================================== */
@media (min-width: 1024px) {
  main { max-width: 1200px; margin: 0 auto; padding: 16px; }
  .cards-row { grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .card { padding: 18px; }
  .card-value { font-size: 1.6rem; }
  .tab-btn { padding: 14px; font-size: 1.1rem; }
  .storage-list { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
}