@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Colors */
    --primary: #1d2b6c;
    --secondary: #2f5972;
    --bg: #FFFFFF;
    --surface: #F8FAFC;
    --border: #E2E8F0;
    --text-dark: #0F172A;
    --text-muted: #64748B;
    --text-inverse: #FFFFFF;
    --success: #059669;
    --warning: #D97706;
    --error: #DC2626;
    --info: #0284C7;

    /* Spacing Scale (8pt System) */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 16px;
    --sp-4: 24px;
    --sp-5: 32px;
    --sp-6: 40px;
    --sp-7: 48px;
    --sp-8: 64px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-card: 0 6px 24px rgba(15, 23, 42, .05);
    --shadow-card-hover: 0 14px 34px rgba(15, 23, 42, .09);
    --shadow-btn: 0 4px 14px rgba(29, 43, 108, .20);
    --shadow-btn-hover: 0 8px 20px rgba(29, 43, 108, .28);
    --shadow-focus: 0 0 0 3px rgba(29, 43, 108, .18);
    --shadow-error-focus: 0 0 0 3px rgba(220, 38, 38, .18);

    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 64px;

    /* Transitions */
    --transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Cairo', 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #F1F5F9;
    direction: rtl;
}

/* Typography & Utility Colors */
h1 { font-size: 28px; font-weight: 800; line-height: 1.35; }
h2 { font-size: 22px; font-weight: 700; line-height: 1.4; }
h3 { font-size: 18px; font-weight: 700; line-height: 1.4; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error, .text-danger { color: var(--error); }
.text-info { color: var(--info); }
.text-small { font-size: 12px; }
.nowrap { white-space: nowrap !important; }
.num-tabular {
    white-space: nowrap !important;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}

/* Global Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex-grow: 1;
    margin-right: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin var(--transition-base);
}

.page-content {
    padding: var(--sp-4);
    flex-grow: 1;
    max-width: 1360px;
    margin: 0 auto;
    width: 100%;
}

/* Buttons System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 42px;
    padding: 0 18px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-family: inherit;
    font-size: 13.5px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
    background-color: var(--secondary);
    box-shadow: var(--shadow-btn-hover);
    transform: translateY(-1px);
    color: var(--text-inverse);
}

.btn-secondary {
    background-color: #F8FAFC;
    color: #334155;
    border: 1px solid #CBD5E1;
}

.btn-secondary:hover {
    background-color: #E2E8F0;
    color: #0F172A;
    border-color: #94A3B8;
}

.btn-outline {
    background-color: #FFFFFF;
    color: var(--text-dark);
    border: 1.5px solid #CBD5E1;
}

.btn-outline:hover {
    background-color: #F8FAFC;
    border-color: var(--primary);
    color: var(--primary);
}

.btn-light {
    background-color: var(--bg);
    color: var(--primary);
    border: 1.5px solid #CBD5E1;
}

.btn-light:hover {
    background-color: rgba(29, 43, 108, 0.06);
    border-color: var(--primary);
}

.btn-success {
    background-color: #059669;
    color: #FFFFFF;
    border-color: #059669;
}

.btn-success:hover {
    background-color: #047857;
    color: #FFFFFF;
    transform: translateY(-1px);
}

.btn-danger {
    background-color: #FEF2F2;
    color: #DC2626;
    border: 1px solid #FECACA;
}

.btn-danger:hover {
    background-color: #DC2626;
    color: #FFFFFF;
}

.btn-primary-light {
    background-color: #EFF6FF;
    color: #1D4ED8;
    border: 1px solid #BFDBFE;
}

.btn-primary-light:hover {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.btn-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    height: 34px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 12.5px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon {
    width: 34px;
    height: 34px;
    padding: 0;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border: 1px solid #E2E8F0;
    background: #FFFFFF;
    color: #475569;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: #F1F5F9;
    color: #0F172A;
    border-color: #CBD5E1;
    transform: translateY(-1px);
}

/* Enterprise Data Tables System */
.table-container,
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    text-align: right;
    font-size: 13.5px;
}

.data-table thead th {
    background-color: #F8FAFC;
    color: #475569;
    font-weight: 800;
    font-size: 12.5px;
    padding: 14px 16px;
    border-bottom: 2px solid #E2E8F0;
    white-space: nowrap;
    vertical-align: middle;
}

.data-table tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid #F1F5F9;
    vertical-align: middle;
    color: #1E293B;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr {
    transition: background-color 120ms ease;
}

.data-table tbody tr:hover {
    background-color: #F8FAFC;
}

/* Status Pills & Badges */
.status-pill,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
    line-height: 1.4;
}

.status-paid {
    background-color: #DCFCE7;
    color: #166534;
    border: 1px solid #BBF7D0;
}

.status-due-now {
    background: linear-gradient(135deg, #DBEAFE, #EFF6FF);
    color: #1E40AF;
    border: 1px solid #93C5FD;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.12);
}

.status-overdue {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.status-partial {
    background-color: #FEF3C7;
    color: #92400E;
    border: 1px solid #FDE68A;
}

.status-scheduled {
    background-color: #F1F5F9;
    color: #475569;
    border: 1px solid #E2E8F0;
}

.status-cancelled {
    background-color: #F8FAFC;
    color: #94A3B8;
    border: 1px dashed #CBD5E1;
    text-decoration: line-through;
}

/* Inputs & Forms */
.form-group {
    margin-bottom: var(--sp-3);
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 700;
    font-size: 13px;
    color: #334155;
}

.form-control {
    width: 100%;
    height: 44px;
    padding: 8px 14px;
    border: 1.5px solid #CBD5E1;
    border-radius: var(--radius-md);
    background-color: var(--bg);
    color: var(--text-dark);
    font-family: inherit;
    font-size: 14px;
    transition: all var(--transition-fast);
}

textarea.form-control {
    height: auto;
    padding: 10px 14px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--shadow-focus);
}

/* Cards */
.card {
    background-color: var(--bg);
    border-radius: var(--radius-lg);
    padding: var(--sp-4);
    border: 1px solid #E2E8F0;
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card-hover:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

/* Responsive */
@media (max-width: 1024px) {
    .main-content {
        margin-right: 0;
    }
}

@media (max-width: 640px) {
    .page-content { padding: var(--sp-3); }
    .btn.btn-sm, .action-toolbar .btn { width: auto !important; }
}