:root {
    --boa-blue: #003366;
    --boa-blue-light: #004d99;
    --boa-red: #E31837;
    --boa-red-dark: #c41430;
    --text-main: #333333;
    --text-light: #666666;
    --bg-soft: #f4f7f9;
    --bg-white: #ffffff;
    --border-color: #dce3e8;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --radius: 4px;
    --shadow: 0 0 0 1px rgba(0,0,0,.05), 0 2px 4px rgba(0,0,0,.05);
    --shadow-lg: 0 4px 12px rgba(0,0,0,.1);
}

* { box-sizing: border-box; -webkit-font-smoothing: antialiased; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-soft);
    color: var(--text-main);
    line-height: 1.5;
    font-size: 14px;
}

/* Navigation */
.nav-top {
    background: var(--boa-blue);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    box-shadow: 0 2px 4px rgba(0,0,0,.15);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    color: white;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.3px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-brand span { color: var(--boa-red); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    color: rgba(255,255,255,.85);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    transition: all 150ms ease-out;
}

.nav-link:hover { background: rgba(255,255,255,.1); color: white; }
.nav-link.active { background: rgba(255,255,255,.15); color: white; }

.nav-link.logout {
    background: var(--boa-red);
    color: white;
    margin-left: 8px;
}

.nav-link.logout:hover { background: var(--boa-red-dark); }

/* Container */
.container { max-width: 1140px; margin: 0 auto; padding: 24px 20px; }
.container-narrow { max-width: 480px; margin: 0 auto; padding: 24px 20px; }

/* Cards */
.card {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--boa-blue);
}

/* Grid */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .nav-top { padding: 0 16px; }
    .container { padding: 16px; }
    .nav-links { flex-wrap: wrap; gap: 4px; }
}

/* Stat Cards */
.stat-card { text-align: center; padding: 20px; }
.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--boa-blue);
    font-variant-numeric: tabular-nums;
}
.stat-label {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 150ms ease-out, box-shadow 150ms ease-out;
    background: var(--bg-white);
}

.form-control:focus {
    outline: none;
    border-color: var(--boa-blue);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

select.form-control { appearance: auto; }
textarea.form-control { resize: vertical; min-height: 80px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    transition: all 150ms ease-out;
    gap: 6px;
}

.btn-primary { background: var(--boa-red); color: white; }
.btn-primary:hover { background: var(--boa-red-dark); }

.btn-secondary { background: var(--boa-blue); color: white; }
.btn-secondary:hover { background: var(--boa-blue-light); }

.btn-outline {
    background: transparent;
    color: var(--boa-blue);
    border: 1px solid var(--border-color);
}
.btn-outline:hover { background: var(--bg-soft); }

.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* Tables */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
    text-align: left;
    padding: 10px 12px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    background: var(--bg-soft);
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
}

td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

tr:hover td { background: rgba(0, 51, 102, 0.02); }

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-success { background: #e6f4ea; color: #1e7e34; }
.badge-warning { background: #fff8e1; color: #856404; }
.badge-danger { background: #fde8e8; color: #c62828; }
.badge-info { background: #e3f2fd; color: #1565c0; }
.badge-secondary { background: #eee; color: #555; }

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 500;
}

.alert-success { background: #e6f4ea; color: #1e7e34; border-left: 4px solid var(--success); }
.alert-danger { background: #fde8e8; color: #c62828; border-left: 4px solid var(--danger); }
.alert-warning { background: #fff8e1; color: #856404; border-left: 4px solid var(--warning); }
.alert-info { background: #e3f2fd; color: #1565c0; border-left: 4px solid var(--info); }

/* Login Page */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--boa-blue) 0%, #001a33 100%);
}

.login-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    margin: 20px;
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo h1 {
    font-size: 22px;
    color: var(--boa-blue);
    margin-bottom: 4px;
}

.login-logo p {
    font-size: 13px;
    color: var(--text-light);
}

/* OTP Input */
.otp-inputs {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin: 24px 0;
}

.otp-input {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    transition: border-color 150ms ease-out;
}

.otp-input:focus {
    outline: none;
    border-color: var(--boa-blue);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

/* Utility */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-light); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-blue { color: var(--boa-blue); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 8px; }

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--boa-blue);
}

.page-subtitle {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 2px;
}

/* Welcome Banner */
.welcome-banner {
    background: linear-gradient(135deg, var(--boa-blue) 0%, #004d99 100%);
    color: white;
    padding: 28px;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.welcome-banner h2 { color: white; font-size: 20px; margin-bottom: 4px; }
.welcome-banner p { opacity: 0.85; font-size: 13px; }

/* Amount Display */
.amount-display {
    font-size: 32px;
    font-weight: 700;
    color: var(--boa-blue);
    font-variant-numeric: tabular-nums;
}

.amount-credit { color: var(--success); }
.amount-debit { color: var(--danger); }

/* Footer */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-light);
    font-size: 12px;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

/* Print Styles */
@media print {
    .nav-top, .nav-sub, .btn, form { display: none !important; }
    .card { box-shadow: none; border: 1px solid #ddd; }
    body { background: white; }
}

/* Responsive */
@media (max-width: 640px) {
    .nav-top { height: 50px; padding: 0 16px; }
    .nav-brand { font-size: 15px; }
    .nav-links { gap: 4px; }
    .nav-link { padding: 6px 10px; font-size: 12px; }
    .login-card { padding: 24px; margin: 12px; }
    .card { padding: 16px; }
    .stat-value { font-size: 22px; }
}