*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background:#f3f4f6;color:#333}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:1rem 0;box-shadow:0 2px 10px rgba(0,0,0,.1)}.navbar .container{display:flex;justify-content:space-between;align-items:center}.nav-brand a{font-size:1.5rem;font-weight:bold;color:#fff;text-decoration:none}.nav-menu{display:flex;align-items:center;gap:2rem}.nav-menu a{color:#fff;text-decoration:none;transition:opacity .3s}.nav-menu a:hover{opacity:.8}.nav-user{display:flex;align-items:center;gap:1rem;border-left:1px solid rgba(255,255,255,.3);padding-left:2rem}.main-content{min-height:calc(100vh - 140px);padding:2rem 0}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.page-header h1{font-size:2rem;color:#1f2937}.card{background:#fff;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.1);padding:1.5rem;margin-bottom:2rem}.table-responsive{overflow-x:auto}table{width:100%;border-collapse:collapse;background:#fff}thead{background:#f9fafb}th,td{padding:1rem;text-align:left;border-bottom:1px solid #e5e7eb}th{font-weight:600;color:#6b7280;font-size:.875rem;text-transform:uppercase}tbody tr:hover{background:#f9fafb}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:#374151}.form-group input,.form-group select,.form-group textarea{width:100%;padding:.75rem;border:1px solid #d1d5db;border-radius:5px;font-size:1rem}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1)}.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.btn{padding:.75rem 1.5rem;border:none;border-radius:5px;font-size:1rem;cursor:pointer;text-decoration:none;display:inline-block;transition:all .3s;font-weight:500}.btn-primary{background:#667eea;color:#fff}.btn-primary:hover{background:#5568d3}.btn-success{background:#10b981;color:#fff}.btn-danger{background:#ef4444;color:#fff}.btn-secondary{background:#6b7280;color:#fff}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn-block{width:100%;text-align:center}.badge{padding:.25rem .75rem;border-radius:9999px;font-size:.875rem;font-weight:500;display:inline-block}.badge-draft{background:#e5e7eb;color:#374151}.badge-sent{background:#dbeafe;color:#1e40af}.badge-paid{background:#d1fae5;color:#065f46}.badge-cancelled{background:#fee2e2;color:#991b1b}.alert{padding:1rem;border-radius:5px;margin-bottom:1rem}.alert-success{background:#d1fae5;color:#065f46;border:1px solid #10b981}.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #ef4444}.auth-page{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;display:flex;align-items:center;justify-content:center}.auth-container{width:100%;max-width:450px;padding:0 20px}.auth-box{background:#fff;padding:2.5rem;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.2)}.auth-box h1{color:#667eea;text-align:center;margin-bottom:.5rem}.auth-subtitle{text-align:center;color:#6b7280;margin-bottom:2rem}.auth-link{text-align:center;margin-top:1.5rem;color:#6b7280}.auth-link a{color:#667eea;text-decoration:none;font-weight:600}.footer{background:#1f2937;color:#fff;text-align:center;padding:2rem 0;margin-top:3rem}@media(max-width:768px){.form-row{grid-template-columns:1fr}}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.95rem;
    color: #374151;
}

input, select {
    box-sizing: border-box;
    font-family: inherit;
}

input:focus, select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

/* .item-row {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
} */

/* In your stylesheet or <style> tag */
.item-row {
    display: grid;
    grid-template-columns: 90px 2fr 140px 160px 100px;
    gap: 12px;
    margin-bottom: 16px;
    padding: 16px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    align-items: flex-end;
}

.item-row label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.item-row input[type="number"],
.item-row input[type="text"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
}

.item-row .item-qty       { text-align: center; }
.item-row .item-rate      { text-align: right; }
.item-row .item-amount    { background: #f3f4f6; text-align: right; font-weight: 600; color: #374151; }

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    .item-row {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .item-row > div:last-child {
        grid-column: 1 / -1;
    }
}