:root{
    --bg-primary:#ffffff;
    --bg-secondary:#ffffff;
    --bg-tertiary:#f8f9fa;
    --text-primary:#1a1a1a;
    --text-secondary:#4a4a4a;
    --text-muted:#6c757d;
    --border-light:#e9ecef;
    --border-medium:#dee2e6;
    --accent-primary:#0ea5e9;
    --accent-primary-dark:#0284c7;
    --accent-hover:#38bdf8;
    --success:#16a34a;
    --success-light:#dcfce7;
    --success-dark:#15803d;
    --danger:#dc2626;
    --danger-light:#fee2e2;
    --danger-dark:#b91c1c;
    --warning:#ea580c;
    --info:#0ea5e9;
    --info-light:#e0f2fe;
    --info-dark:#0284c7;
    --shadow-sm:0 1px 3px 0 rgba(0, 0, 0, 0.08);
    --shadow-md:0 4px 12px 0 rgba(0, 0, 0, 0.1);
    --shadow-lg:0 10px 25px 0 rgba(0, 0, 0, 0.12);
    --shadow-xl:0 20px 40px 0 rgba(0, 0, 0, 0.15);
    --radius-sm:6px;
    --radius-md:10px;
    --radius-lg:14px;
    --radius-xl:18px;
    --transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body{
    margin:0;
    background:linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
    min-height:100vh;
    color:var(--text-primary);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
    line-height:1.6;
    font-size:15px;
}

.container{
    max-width:1400px;
    margin:0 auto;
    padding:40px 32px;
}

.header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:24px;
    margin-bottom:40px;
    padding:24px 32px;
    background:white;
    border-radius:var(--radius-xl);
    box-shadow:var(--shadow-lg);
    border:1px solid var(--border-light);
}

.header-brand{
    display:flex;
    align-items:center;
    gap:16px;
}

.logo{
    display:flex;
    align-items:center;
    justify-content:center;
    animation:fadeInScale 0.6s ease-out;
}

@keyframes fadeInScale{
    0%{opacity:0;transform:scale(0.8);}
    100%{opacity:1;transform:scale(1);}
}

.header-text{
    display:flex;
    flex-direction:column;
    gap:4px;
}

.header-actions{
    display:flex;
    gap:16px;
    align-items:center;
}

.header-stats{
    display:flex;
    gap:12px;
    margin-right:8px;
}

.stat-pill{
    display:flex;
    align-items:center;
    gap:8px;
    padding:8px 16px;
    background:linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius:999px;
    border:1px solid #bae6fd;
}

.stat-label{
    font-size:12px;
    font-weight:600;
    color:var(--text-muted);
    text-transform:uppercase;
    letter-spacing:0.5px;
}

.stat-value{
    font-size:16px;
    font-weight:800;
    color:var(--accent-primary);
    letter-spacing:-0.02em;
}

.btn-login,
.btn-logout{
    padding:10px 24px;
    border:2px solid var(--accent-primary);
    border-radius:var(--radius-md);
    background:transparent;
    color:var(--accent-primary);
    cursor:pointer;
    font-weight:700;
    font-size:14px;
    transition:var(--transition);
    box-shadow:none;
    text-transform:uppercase;
    letter-spacing:0.5px;
}

.btn-login:hover,
.btn-logout:hover{
    background:var(--accent-primary);
    color:white;
    transform:translateY(-2px);
    box-shadow:var(--shadow-md);
}

.header-auth{
    display:flex;
    gap:12px;
    align-items:center;
}

h1{
    margin:0;
    font-size:28px;
    font-weight:800;
    background:linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
    background-clip:text;
    letter-spacing:-0.02em;
    line-height:1.2;
}

.sub{
    color:var(--text-muted);
    margin:0;
    font-size:13px;
    font-weight:500;
    line-height:1.5;
}

/* Tabs */
.tabs{
    display:flex;
    gap:0;
    margin:32px 0;
    padding:0;
    background:transparent;
    border-radius:0;
    border:none;
    border-bottom:2px solid var(--border-light);
    position:relative;
}

.tabbtn{
    flex:1;
    padding:16px 24px;
    border:none;
    border-radius:0;
    background:transparent;
    color:var(--text-muted);
    cursor:pointer;
    font-weight:700;
    font-size:15px;
    transition:var(--transition);
    position:relative;
    border-bottom:3px solid transparent;
    margin-bottom:-2px;
    text-transform:uppercase;
    letter-spacing:0.5px;
}

.tabbtn::before{
    content:'';
    position:absolute;
    bottom:0;
    left:50%;
    width:0;
    height:3px;
    background:linear-gradient(90deg, var(--accent-primary), var(--accent-primary-dark));
    transform:translateX(-50%);
    transition:width 0.3s ease;
    border-radius:3px 3px 0 0;
}

.tabbtn:hover{
    background:transparent;
    color:var(--text-primary);
}

.tabbtn:hover::before{
    width:60%;
}

.tabbtn.active{
    background:transparent;
    color:var(--accent-primary);
    box-shadow:none;
    border-bottom-color:transparent;
}

.tabbtn.active::before{
    width:100%;
}

.tab{display:none;animation:fadeIn 0.3s ease-in}
.tab.active{display:block}

@keyframes fadeIn{
    from{opacity:0;transform:translateY(4px)}
    to{opacity:1;transform:translateY(0)}
}

/* Cards & grid */
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}

.card{
    border:1px solid var(--border-light);
    border-radius:var(--radius-lg);
    padding:24px;
    background:var(--bg-secondary);
    box-shadow:var(--shadow-md);
    transition:var(--transition);
    position:relative;
    backdrop-filter:blur(10px);
    overflow:hidden;
}

.card::before{
    content:'';
    position:absolute;
    top:-50%;
    left:-50%;
    width:200%;
    height:200%;
    background:conic-gradient(
        from 0deg,
        transparent 0deg,
        rgba(14, 165, 233, 0.1) 60deg,
        transparent 120deg
    );
    animation:rotate 8s linear infinite;
    opacity:0;
    transition:opacity 0.3s ease;
}

.card:hover::before{
    opacity:1;
}

.card:hover{
    box-shadow:var(--shadow-lg);
    border-color:var(--accent-primary);
    transform:translateY(-2px);
}

.card > *{
    position:relative;
    z-index:1;
}

@keyframes rotate{
    0%{transform:rotate(0deg);}
    100%{transform:rotate(360deg);}
}




.modal{
    display:none;
    position:fixed;
    z-index:1000;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.5);
    backdrop-filter:blur(4px);
    animation:fadeIn 0.2s ease;
}

.modal.show{
    display:flex;
    align-items:center;
    justify-content:center;
}

.modal-content{
    background:var(--bg-primary);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-xl);
    width:90%;
    max-width:450px;
    animation:slideUp 0.3s ease;
}

@keyframes slideUp{
    from{opacity:0;transform:translateY(20px)}
    to{opacity:1;transform:translateY(0)}
}

.modal-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:24px 24px 16px;
    border-bottom:1px solid var(--border-light);
}

.modal-header h2{
    margin:0;
    font-size:24px;
    font-weight:600;
    color:var(--text-primary);
}

.close-btn{
    background:transparent;
    border:none;
    font-size:32px;
    color:var(--text-muted);
    cursor:pointer;
    padding:0;
    width:32px;
    height:32px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:var(--radius-md);
    transition:var(--transition);
    box-shadow:none;
}

.close-btn:hover{
    background:var(--bg-tertiary);
    color:var(--text-primary);
    transform:none;
}

.modal-form{
    padding:24px;
    display:flex;
    flex-direction:column;
    gap:20px;
}

.modal-form label{
    display:block;
    font-size:14px;
    font-weight:500;
    color:var(--text-secondary);
    margin-bottom:8px;
}

.auth-message{
    display:none;
    padding:12px 16px;
    border-radius:var(--radius-md);
    font-size:14px;
    font-weight:500;
}

.auth-message.info{background:var(--info-light);color:var(--info-dark);}
.auth-message.success{background:var(--success-light);color:var(--success-dark);}
.auth-message.error{background:var(--danger-light);color:var(--danger-dark);}

.label{
    font-size:13px;
    color:var(--text-secondary);
    margin-bottom:8px;
    font-weight:500;
    text-transform:uppercase;
    letter-spacing:0.03em;
}

.muted{color:var(--text-muted);font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px}

input,select,button{font:inherit}

input,select{
    width:100%;
    padding:12px 16px;
    border:1px solid var(--border-medium);
    border-radius:var(--radius-md);
    background:var(--bg-secondary);
    font-size:15px;
    transition:var(--transition);
    color:var(--text-primary);
}

input:focus,select:focus{
    outline:none;
    border-color:var(--accent-primary);
    box-shadow:0 0 0 3px rgba(14,165,233,0.1);
}

input::placeholder{color:var(--text-muted)}
input[type="number"]{text-align:right}

button{
    padding:12px 20px;
    border:none;
    border-radius:var(--radius-md);
    background:linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-dark) 100%);
    color:#fff;
    cursor:pointer;
    font-weight:600;
    font-size:15px;
    transition:var(--transition);
    box-shadow:var(--shadow-sm);
}

button:hover{
    box-shadow:var(--shadow-lg);
    transform:translateY(-2px);
}

button:active{transform:translateY(0)}

button.secondary{
    background:var(--bg-tertiary);
    color:var(--text-primary);
    border:1px solid var(--border-medium);
}

button.secondary:hover{
    background:var(--border-medium);
}

button.ghost{
    background:var(--bg-secondary);
    color:var(--text-secondary);
    border:1px solid var(--border-light);
}

button.ghost:hover{
    background:var(--bg-tertiary);
    border-color:var(--border-medium);
}

button:disabled{
    opacity:.5;
    cursor:not-allowed;
    transform:none;
}

.kpi{
    font-size:32px;
    font-weight:800;
    color:var(--text-primary);
    letter-spacing:-0.03em;
    margin-top:8px;
}

.badge{
    display:inline-block;
    padding:6px 14px;
    background:var(--info-light);
    border-radius:999px;
    font-size:13px;
    color:var(--info-dark);
    font-weight:600;
    letter-spacing:0.01em;
}

/* Responsive form grid */
.form-grid{
    display:grid;
    gap:16px;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
}
.wide-2{grid-column:span 2}
.wide-3{grid-column:span 3}

/* Item / Name blocks */
.choose{display:flex;gap:10px;align-items:center}
.choose select{flex:1 1 auto;min-width:220px}
.new-row{
    margin-top:12px;
    display:none;
    padding:16px;
    background:var(--bg-tertiary);
    border-radius:var(--radius-md);
    border:1px solid var(--border-light);
}
.new-row .inline{display:flex;gap:10px;align-items:center}
.new-row input{flex:1 1 auto;min-width:240px}

/* Period bar */
.periodbar{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    align-items:center;
    margin-bottom:16px;
    padding:16px;
    background:var(--bg-tertiary);
    border-radius:var(--radius-md);
}

.periodbar .seg{
    display:inline-flex;
    border:1px solid var(--border-medium);
    border-radius:var(--radius-md);
    overflow:hidden;
    background:var(--bg-secondary);
}

.periodbar .seg button{
    border:0;
    background:transparent;
    color:var(--text-secondary);
    padding:10px 16px;
    border-radius:0;
}

.periodbar .seg button:hover{
    background:var(--bg-tertiary);
    transform:none;
}

.periodbar .seg button.active{
    background:var(--accent-primary);
    color:#fff;
}

.periodbar .nav{display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* Table */
table{
    width:100%;
    border-collapse:collapse;
    font-size:14px;
    table-layout:auto;
}

thead{
    background:var(--bg-tertiary);
    border-bottom:2px solid var(--border-medium);
}

th,td{
    padding:14px 16px;
    border-bottom:1px solid var(--border-light);
    text-align:left;
    vertical-align:middle;
}

td.num,th.num{text-align:right}

th{
    font-weight:600;
    color:var(--text-primary);
    text-transform:uppercase;
    font-size:12px;
    letter-spacing:0.05em;
}

th.sortable{
    cursor:pointer;
    user-select:none;
    transition:var(--transition);
}

th.sortable:hover{
    color:var(--accent-primary);
    background:var(--bg-tertiary);
}

th.sortable .arrow{opacity:.4;margin-left:6px;font-size:10px}
th.sortable.active .arrow{opacity:1;color:var(--accent-primary)}

tbody tr{
    transition:var(--transition);
}

tbody tr:hover{
    background:var(--bg-tertiary);
}

#tbl th:nth-child(3), #tbl td:nth-child(3){min-width:200px}
#tbl th:nth-child(4), #tbl td:nth-child(4){min-width:90px;text-align:right}
#tbl th:nth-child(5), #tbl td:nth-child(5){min-width:110px;text-align:right}
#tbl th:nth-child(9), #tbl td:nth-child(9){min-width:120px;text-align:right}

.pill{
    padding:6px 12px;
    border-radius:999px;
    font-size:12px;
    display:inline-block;
    font-weight:600;
    letter-spacing:0.01em;
}

.sale{
    background:var(--success-light);
    color:var(--success-dark);
}

.expense{
    background:var(--danger-light);
    color:var(--danger-dark);
}

.payment{
    background:var(--info-light);
    color:var(--info-dark);
}

.totals{
    background:var(--bg-tertiary);
    font-weight:700;
    color:var(--text-primary);
    border-top:2px solid var(--border-medium);
}

.mini-table{
    width:100%;
    border-collapse:collapse;
    font-size:14px;
}

.mini-table th,.mini-table td{
    padding:12px 16px;
    border-bottom:1px solid var(--border-light);
}

.mini-table th{
    background:var(--bg-tertiary);
    font-weight:600;
    text-transform:uppercase;
    font-size:11px;
    letter-spacing:0.05em;
    color:var(--text-secondary);
}

.mini-table td.num{text-align:right;font-weight:500}

.mini-table tbody tr{transition:var(--transition)}
.mini-table tbody tr:hover{background:var(--bg-tertiary)}

@media (max-width:1024px){
    .wide-2,.wide-3{grid-column:span 1}
    .cards{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
    .grid[style*="grid-template-columns:1fr 1fr"]{grid-template-columns:1fr !important}
}

/* Mobile app styling */
@media (max-width: 768px){
    body {
      padding-bottom:env(safe-area-inset-bottom);
      background:#f5f5f5;
    }

    .container {
      padding:16px 16px 80px;
      max-width:100%;
    }

    .header {
      flex-direction:column;
      align-items:flex-start;
      gap:16px;
      margin-bottom:16px;
      padding:20px;
    }

    .header-brand{
      width:100%;
    }

    .header-actions{
      width:100%;
      justify-content:space-between;
    }

    .header-stats{
      margin-right:0;
    }

    .stat-pill{
      padding:6px 12px;
    }

    .stat-label{
      font-size:11px;
    }

    .stat-value{
      font-size:14px;
    }

    .header-auth {
      width:100%;
      justify-content:flex-end;
    }

    h1 {
      font-size:22px;
      font-weight:800;
    }

    .sub{
      font-size:14px;
      margin-bottom:0;
      color:var(--text-muted);
    }

    .modal-content {
      width:95%;
      margin:16px;
    }

    .tabs {
      position:fixed;
      bottom:0;
      left:0;
      right:0;
      z-index:100;
      margin:0;
      padding:8px;
      background:#ffffff;
      border-radius:0;
      border:none;
      border-top:1px solid var(--border-light);
      box-shadow:0 -2px 10px rgba(0,0,0,0.08);
      gap:4px;
      padding-bottom:calc(8px + env(safe-area-inset-bottom));
    }

    .tabbtn {
      padding:12px 8px;
      font-size:11px;
      border-radius:8px;
      font-weight:700;
    }


    .cards {
      grid-template-columns:1fr !important;
      gap:10px;
    }

    .card {
      border-radius:12px;
      padding:16px;
      box-shadow:0 1px 3px rgba(0,0,0,0.06);
    }

    .kpi {
      font-size:26px;
      margin-top:4px;
    }

    .muted {
      font-size:12px;
      font-weight:600;
      text-transform:uppercase;
      letter-spacing:0.5px;
    }

    .form-grid {
      grid-template-columns:1fr !important;
    }
}