/* billing applications/assets/css/style.css */
/* Clean, Minimalist, Professional Design System with White Theme */

:root {
    --bg-main: #FFFFFF;
    --bg-subtle: #F8FAFC;
    --bg-card: #FFFFFF;
    --border-light: #E2E8F0;
    --border-hover: #CBD5E1;
    --text-main: #0F172A;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    --primary: #0F172A;
    --primary-hover: #1E293B;
    --accent: #2563EB;
    --accent-hover: #1D4ED8;
    --success: #059669;
    --success-bg: #ECFDF5;
    --warning: #D97706;
    --danger: #DC2626;
    --danger-bg: #FEF2F2;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-subtle);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.app-header {
    background-color: var(--bg-main);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-main);
}

.brand-badge {
    background-color: var(--primary);
    color: #FFFFFF;
    font-weight: 700;
    font-size: 13px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.5px;
}

.brand-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 13px;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
}

.nav-link:hover {
    color: var(--text-main);
    background-color: var(--bg-subtle);
}

.nav-link.active {
    color: var(--primary);
    background-color: #F1F5F9;
    font-weight: 600;
}

.nav-admin-link {
    color: #475569;
    border: 1px solid var(--border-light);
}

.nav-admin-link:hover {
    background-color: #F8FAFC;
    border-color: #CBD5E1;
}

/* Page Layout */
.main-wrapper {
    flex: 1;
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px 60px 20px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-main);
}

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

/* Cards */
.card {
    background: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Grid & Form Elements */
.grid {
    display: grid;
    gap: 16px;
}

.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 768px) {
    .grid-cols-2, .grid-cols-3, .grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.form-control, .form-select, .form-textarea {
    width: 100%;
    padding: 9px 12px;
    font-size: 13.5px;
    color: var(--text-main);
    background-color: #FFFFFF;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    outline: none;
    font-family: inherit;
}

.form-control:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 70px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary);
    color: #FFFFFF;
    border-color: var(--primary);
}
.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-accent {
    background-color: var(--accent);
    color: #FFFFFF;
}
.btn-accent:hover {
    background-color: var(--accent-hover);
}

.btn-outline {
    background-color: #FFFFFF;
    color: var(--text-main);
    border-color: var(--border-light);
}
.btn-outline:hover {
    background-color: var(--bg-subtle);
    border-color: var(--border-hover);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-danger {
    background-color: var(--danger-bg);
    color: var(--danger);
    border-color: #FECACA;
}
.btn-danger:hover {
    background-color: #FEE2E2;
}

.btn-success {
    background-color: var(--success);
    color: #FFFFFF;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 13px;
}

.table th {
    background-color: var(--bg-subtle);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-light);
}

.table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-main);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: #FAFAFA;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 9999px;
    letter-spacing: 0.2px;
}

.badge-bill {
    background-color: #E0E7FF;
    color: #3730A3;
}

.badge-quote {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-kpc {
    background-color: #F1F5F9;
    color: #0F172A;
    border: 1px solid #CBD5E1;
}

.badge-kpp {
    background-color: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

.badge-apfm {
    background-color: #F0FDF4;
    color: #166534;
    border: 1px solid #BBF7D0;
}

.badge-paid {
    background-color: #DCFCE7;
    color: #15803D;
}

.badge-partial {
    background-color: #FEF9C3;
    color: #A16207;
}

.badge-unpaid {
    background-color: #FEE2E2;
    color: #B91C1C;
}

/* Stats Widget */
.stat-card {
    background: #FFFFFF;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-main);
}

.stat-sub {
    font-size: 11.5px;
    color: var(--text-light);
}

/* Footer */
.app-footer {
    background-color: var(--bg-main);
    border-top: 1px solid var(--border-light);
    padding: 20px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 12.5px;
    margin-top: auto;
}