:root{--bg:#0f1724;--card:#0b1220;--muted:#9aa4b2;--accent:#3b82f6;--glass:rgba(255,255,255,0.03);--success:#10b981;--danger:#dc3545;--warning:#f59e0b}
*{box-sizing:border-box}
html{min-height:100%;margin:0;background:#001529}
body{min-height:100%;margin:0;font-family:Inter,Segoe UI,Helvetica,Arial,sans-serif;background:#001529;color:#e6eef8}
.container{max-width:1100px;margin:28px auto;padding:20px}
header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
header h1{font-size:1.25rem;margin:0}
.card{background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.01));border-radius:10px;padding:18px;border:1px solid rgba(255,255,255,0.04)}

/* Tabs */
.tabs{display:flex;gap:8px;margin-bottom:14px}
.tab{background:var(--glass);border:1px solid rgba(255,255,255,0.03);padding:8px 12px;border-radius:8px;color:var(--muted);cursor:pointer}
.tab[aria-selected="true"]{background:linear-gradient(90deg,var(--accent),#60a5fa);color:var(--bg);box-shadow:0 6px 18px rgba(59,130,246,0.15);font-weight:600}
.tab:focus{outline:3px solid rgba(96,165,250,0.12)}

/* Panels */
.panels > section{display:none;padding-top:8px}
.panels > section[aria-hidden="false"]{display:block}

/* Usher form */
.form-row{display:flex;gap:8px;margin-bottom:8px}
.form-row input,.form-row select{flex:1;padding:8px;border-radius:6px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit}
.btn{background:var(--accent);border:none;color:var(--bg);padding:8px 12px;border-radius:8px;cursor:pointer}

/* Inventory table */
.toolbar{display:flex;gap:8px;align-items:center;margin-bottom:12px}
.toolbar select{padding:8px;border-radius:6px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit}
.search{padding:8px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit}
table{width:100%;border-collapse:collapse}
th,td{padding:10px 8px;text-align:left;border-bottom:1px solid rgba(255,255,255,0.03);font-size:0.95rem}
th{color:var(--muted);font-weight:600}

/* Responsive */
@media (max-width:720px){.form-row{flex-direction:column}.tabs{flex-wrap:wrap}}

/* Modal styles */
.modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.7);align-items:center;justify-content:center;z-index:9999;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
.modal-card{background:linear-gradient(180deg,rgba(255,255,255,0.05),rgba(255,255,255,0.02));border-radius:12px;max-width:520px;width:90%;padding:24px;box-shadow:0 20px 60px rgba(0,0,0,0.4);border:1px solid rgba(255,255,255,0.08);color:#e6eef8}
.modal-card h3{margin:0 0 16px 0;font-size:1.2rem;color:#e6eef8;font-weight:600}
.modal-card label{display:block;font-weight:600;margin-bottom:6px;color:#9aa4b2;font-size:0.9rem}
.modal-card input,.modal-card select{width:100%;padding:10px 12px;border:1px solid rgba(255,255,255,0.08);border-radius:8px;background:rgba(255,255,255,0.03);color:#e6eef8;font-size:0.95rem;transition:border 0.2s,background 0.2s}
.modal-card input:focus,.modal-card select:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,0.05)}
.modal-card input::placeholder{color:var(--muted)}
.modal-card .btn{margin-top:8px;padding:10px 18px;font-size:0.95rem}
.modal-card #modal-close{background:transparent;border:none;font-size:1.8rem;cursor:pointer;color:#9aa4b2;padding:0;line-height:1;transition:color 0.2s}
.modal-card #modal-close:hover{color:#e6eef8}
.field-error{color:#ff6b6b;font-size:0.85rem;margin-top:6px;display:none;font-weight:500}
.modal form{display:flex;flex-direction:column;gap:12px}
.modal form > div{display:flex;flex-direction:column}
#locations-list{max-height:360px;overflow:auto;border-top:1px solid rgba(255,255,255,0.08);padding-top:12px;margin-top:12px}
#locations-list .location-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid rgba(255,255,255,0.05)}
#locations-list .location-row:last-child{border-bottom:none}
#locations-list .location-row strong{color:#e6eef8;font-size:1rem}
#locations-list .location-row .desc{font-size:0.85rem;color:var(--muted);margin-top:4px}
#locations-list .btn{padding:6px 12px;font-size:0.85rem;margin-left:6px}

/* Location tabs */
.location-tab{padding:8px 16px;border-radius:8px;border:1px solid rgba(255,255,255,0.1);background:rgba(255,255,255,0.03);color:var(--muted);cursor:pointer;white-space:nowrap;font-weight:500;transition:all 0.2s}
.location-tab:hover{background:rgba(59,130,246,0.2);border-color:var(--accent)}
.location-tab.active{background:var(--accent);color:white;border-color:var(--accent)}

/* Pagination */
.pagination-btn{padding:8px 12px;border-radius:6px;border:1px solid rgba(255,255,255,0.1);background:rgba(255,255,255,0.03);color:var(--muted);cursor:pointer;font-weight:500;transition:all 0.2s}
.pagination-btn:hover:not(:disabled){background:rgba(59,130,246,0.2);border-color:var(--accent);color:var(--accent)}
.pagination-btn:disabled{opacity:0.4;cursor:not-allowed}
.pagination-btn.active{background:var(--accent);color:white;border-color:var(--accent)}
.pagination-info{color:var(--muted);font-size:0.9rem;padding:0 12px}

/* Header responsive styles */
.main-header{margin-bottom:18px}
.header-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.header-title h1{font-size:1.25rem;margin:0}
.header-actions{display:flex;gap:10px;align-items:center}
.header-btn{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--muted);padding:10px 16px;border-radius:8px;background:rgba(255,255,255,0.05);transition:background 0.2s;border:none;cursor:pointer;font-family:inherit;font-size:inherit;min-height:44px}
.header-btn:hover{background:rgba(255,255,255,0.1)}
.logout-btn{background:#dc3545;color:white}
.logout-btn:hover{background:#c82333}

/* Table wrapper for horizontal scroll */
.table-wrapper{overflow-x:auto;margin-top:8px}

/* Mobile: Tablets and below (768px) */
@media (max-width:768px){
  .container{padding:16px;margin:16px auto}
  .card{padding:14px}
  
  /* Header stacks on tablet */
  .header-content{flex-direction:column;align-items:flex-start}
  .header-actions{width:100%;justify-content:flex-start}
  
  /* Tabs become horizontally scrollable */
  .tabs{overflow-x:auto;flex-wrap:nowrap}
  .tabs::-webkit-scrollbar{height:4px}
  .tabs::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.2);border-radius:4px}
  
  /* Stats grid becomes 2x2 */
  .inventory-stats{grid-template-columns:1fr 1fr!important}
  
  /* Toolbars wrap more aggressively */
  .toolbar{gap:10px}
  .toolbar select,.toolbar input{min-width:140px}
}

/* Mobile: Phones (576px and below) */
@media (max-width:576px){
  .container{padding:12px;margin:8px auto}
  .card{padding:12px}
  
  /* Header fully stacks */
  .header-title h1{font-size:1.1rem}
  .header-btn{padding:10px 14px;font-size:0.9rem}
  
  /* Increase touch targets */
  .tab,.btn{padding:12px 16px;min-height:44px}
  .tab{font-size:0.9rem}
  
  /* Toolbars stack vertically */
  .toolbar{flex-direction:column;align-items:stretch}
  .toolbar select,.toolbar input,.toolbar button{width:100%;min-width:0}
  
  /* Form inputs full width */
  .form-row{flex-direction:column}
  .form-row input,.form-row select,.form-row button{width:100%}
  
  /* Filter sections stack */
  div[style*="display:flex"][style*="flex-wrap"]:has(input[type="date"]){flex-direction:column}
  div[style*="display:flex"][style*="flex-wrap"] input,
  div[style*="display:flex"][style*="flex-wrap"] select{flex:none!important;width:100%!important;min-width:0!important}
  
  /* Stats grid becomes single column */
  .inventory-stats{grid-template-columns:1fr!important}
  div[style*="display:flex"][style*="gap:16px"]:has(#total-items){flex-direction:column;gap:12px!important}
  
  /* Tables full width with scroll */
  table{display:block;overflow-x:auto;white-space:nowrap}
  
  /* Modal becomes full screen */
  .modal-card{width:95%;max-width:none;padding:20px;border-radius:8px}
  .modal-card h3{font-size:1.1rem}
  
  /* Reduce font sizes */
  th,td{font-size:0.85rem;padding:8px 6px}
  
  /* Grid layouts become single column */
  div[style*="grid-template-columns:1fr 1fr"]{grid-template-columns:1fr!important}
}

/* Very small phones (375px and below) */
@media (max-width:375px){
  .container{padding:10px;margin:6px auto}
  .card{padding:10px}
  .header-title h1{font-size:1rem}
  .tab,.btn{padding:10px 12px;font-size:0.85rem}
  th,td{font-size:0.8rem;padding:6px 4px}
}

/* ===== AUTH PAGE STYLES (Dark Theme) ===== */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.auth-card{background:linear-gradient(180deg,rgba(255,255,255,0.05),rgba(255,255,255,0.02));border-radius:12px;max-width:420px;width:100%;padding:2.5rem;box-shadow:0 20px 60px rgba(0,0,0,0.4);border:1px solid rgba(255,255,255,0.08);color:#e6eef8}
.auth-card h2,.auth-card h3{margin:0 0 1.5rem 0;text-align:center;font-weight:700;color:#e6eef8}
.auth-card label{display:block;font-weight:600;margin-bottom:6px;color:var(--muted);font-size:0.9rem}
.auth-card input[type="text"],.auth-card input[type="email"],.auth-card input[type="password"]{width:100%;padding:12px 15px;border:1px solid rgba(255,255,255,0.08);border-radius:8px;background:rgba(255,255,255,0.03);color:#e6eef8;font-size:0.95rem;transition:border 0.2s,background 0.2s}
.auth-card input:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,0.05)}
.auth-card input::placeholder{color:var(--muted)}
.auth-card .form-group{margin-bottom:1rem}
.auth-card .btn-auth{display:block;width:100%;background:linear-gradient(90deg,var(--accent),#60a5fa);border:none;color:var(--bg);padding:12px 30px;border-radius:25px;font-weight:600;cursor:pointer;font-size:1rem;transition:opacity 0.2s,transform 0.2s;margin-top:0.5rem}
.auth-card .btn-auth:hover{opacity:0.9;transform:translateY(-1px)}
.auth-card a{color:var(--accent);text-decoration:none;transition:opacity 0.2s}
.auth-card a:hover{opacity:0.8}
.auth-card .auth-footer{text-align:center;margin-top:1.25rem;font-size:0.9rem;color:var(--muted)}
.auth-card .auth-link-right{text-align:right;margin-top:4px}
.auth-card .auth-link-right a{font-size:0.85rem;color:var(--muted)}

/* Auth alerts */
.auth-alert{padding:12px 16px;border-radius:8px;margin-bottom:1rem;font-size:0.9rem}
.auth-alert-success{background:rgba(16,185,129,0.12);color:#6ee7b7;border:1px solid rgba(16,185,129,0.2)}
.auth-alert-danger{background:rgba(239,68,68,0.12);color:#fca5a5;border:1px solid rgba(239,68,68,0.2)}
.auth-alert-info{background:rgba(59,130,246,0.12);color:#93c5fd;border:1px solid rgba(59,130,246,0.2)}
.auth-alert ul{margin:0;padding-left:1.2em}

/* ===== TOAST NOTIFICATION SYSTEM ===== */
.toast{pointer-events:auto;padding:14px 20px;border-radius:10px;color:#e6eef8;font-size:0.9rem;font-weight:500;box-shadow:0 8px 24px rgba(0,0,0,0.4);display:flex;align-items:center;gap:10px;min-width:250px;max-width:400px;animation:toastIn 0.3s ease-out;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.08)}
.toast-success{background:rgba(16,185,129,0.9)}
.toast-error{background:rgba(220,53,69,0.9)}
.toast-info{background:rgba(59,130,246,0.9)}
.toast-warning{background:rgba(245,158,11,0.9);color:var(--bg)}
.toast-icon{font-size:1.2rem;flex-shrink:0}
.toast-message{flex:1}
.toast-close{background:none;border:none;color:inherit;cursor:pointer;font-size:1.2rem;padding:0;margin-left:8px;opacity:0.7;transition:opacity 0.2s}
.toast-close:hover{opacity:1}
@keyframes toastIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes toastOut{from{transform:translateX(0);opacity:1}to{transform:translateX(100%);opacity:0}}

/* ===== CONFIRM DIALOG (Dark Theme) ===== */
.confirm-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.7);display:flex;align-items:center;justify-content:center;z-index:10000;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.confirm-box{background:linear-gradient(180deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));padding:24px;border-radius:12px;max-width:400px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,0.4);border:1px solid rgba(255,255,255,0.08)}
.confirm-box p{margin-bottom:16px;color:#e6eef8;font-size:0.95rem;line-height:1.5}
.confirm-buttons{display:flex;gap:8px;justify-content:flex-end}

/* ===== SKELETON LOADING ===== */
.skeleton{background:linear-gradient(90deg,rgba(255,255,255,0.03) 25%,rgba(255,255,255,0.06) 50%,rgba(255,255,255,0.03) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:6px}
.skeleton-row{height:48px;margin-bottom:8px;border-radius:8px}
.skeleton-card{height:80px;margin-bottom:12px;border-radius:8px}
.skeleton-text{height:14px;margin-bottom:8px;width:60%}
.skeleton-text-short{height:14px;margin-bottom:8px;width:30%}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ===== EMPTY STATE ===== */
.empty-state{text-align:center;padding:40px 20px;color:var(--muted)}
.empty-state-icon{font-size:3rem;margin-bottom:12px;opacity:0.5}
.empty-state-title{font-size:1.1rem;font-weight:600;margin-bottom:6px;color:#e6eef8}
.empty-state-text{font-size:0.9rem;color:var(--muted)}

/* ===== DASHBOARD TABLE STYLES (replaces Bootstrap) ===== */
.data-table{width:100%;border-collapse:collapse}
.data-table th,.data-table td{padding:10px 8px;text-align:left;border-bottom:1px solid rgba(255,255,255,0.05);font-size:0.95rem}
.data-table th{color:var(--muted);font-weight:600;font-size:0.85rem;text-transform:uppercase;letter-spacing:0.03em}
.data-table tbody tr:hover{background:rgba(59,130,246,0.05)}

/* Badge styles */
.badge{display:inline-block;padding:4px 10px;border-radius:12px;font-size:0.8rem;font-weight:600}
.badge-success{background:rgba(16,185,129,0.15);color:#6ee7b7}
.badge-warning{background:rgba(245,158,11,0.15);color:#fbbf24}
.badge-danger{background:rgba(220,53,69,0.15);color:#fca5a5}
.badge-info{background:rgba(59,130,246,0.15);color:#93c5fd}
.badge-secondary{background:rgba(255,255,255,0.08);color:var(--muted)}

/* Pagination styles */
.pagination{display:flex;gap:4px;justify-content:center;align-items:center;margin-top:16px;flex-wrap:wrap}

/* ===== FORM ROW SELECT (Dark) ===== */
.form-row-select{padding:8px 12px;border-radius:8px;border:1px solid rgba(255,255,255,0.08);background:rgba(255,255,255,0.03);color:#e6eef8;font-size:0.95rem;cursor:pointer;transition:border 0.2s}
.form-row-select:focus{outline:none;border-color:var(--accent)}
.form-row-select option{background:var(--bg);color:#e6eef8}

/* ===== TAB PANEL TRANSITIONS ===== */
.panels > section[aria-hidden="false"]{animation:fadeIn 0.2s ease-out}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}

/* ===== SCROLL SHADOW FOR TABLES ===== */
.table-scroll-wrapper{position:relative;overflow-x:auto;-webkit-overflow-scrolling:touch}
.table-scroll-wrapper::after{content:'';position:absolute;top:0;right:0;bottom:0;width:24px;background:linear-gradient(to left,rgba(11,18,32,0.3),transparent);pointer-events:none;opacity:0;transition:opacity 0.3s}
.table-scroll-wrapper.has-scroll::after{opacity:1}