:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

html { overflow-x: hidden; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

body[dir="ltr"] { direction: ltr; }
body[dir="rtl"] { direction: rtl; }

.loading-screen {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    z-index: 9999; color: white;
}

.spinner {
    width: 50px; height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.screen { display: none; }
.screen.active { display: block; }

.login-container {
    min-height: 100vh;
    display: flex; justify-content: center; align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.login-header { text-align: center; margin-bottom: 30px; }
.login-header i { font-size: 48px; color: var(--primary-color); margin-bottom: 15px; }
.login-header h1 { font-size: 24px; margin-bottom: 10px; color: var(--text-primary); }
.login-header p { color: var(--text-secondary); font-size: 14px; }

.login-form .form-group { margin-bottom: 20px; }
.login-form label { display: block; margin-bottom: 8px; color: var(--text-primary); font-weight: 500; }
.login-form input {
    width: 100%; padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px; font-size: 16px;
}
.login-form input:focus { outline: none; border-color: var(--primary-color); }

.login-footer { margin-top: 20px; text-align: center; }
.lang-switcher { background: none; border: none; color: var(--primary-color); cursor: pointer; font-size: 14px; padding: 8px; }

.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white; padding: 12px 16px;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
    box-shadow: var(--shadow); position: sticky; top: 0; z-index: 100;
}

.header-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.menu-toggle { background: none; border: none; color: white; font-size: 20px; cursor: pointer; padding: 10px; border-radius: 8px; min-width: 44px; min-height: 44px; display: flex; align-items: center; justify-content: center; }
.menu-toggle:hover { background: rgba(255,255,255,0.2); }
.app-header h1 { font-size: 18px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.header-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.lang-switcher-header, .user-menu {
    background: rgba(255,255,255,0.2); border: none; color: white;
    padding: 8px 16px; border-radius: 8px; font-size: 14px;
}
.lang-switcher-header { cursor: pointer; }

.sidebar {
    position: fixed; left: 0; top: 60px; width: 250px;
    height: calc(100vh - 60px); background: var(--card-bg);
    box-shadow: var(--shadow); transform: translateX(-100%);
    transition: transform 0.3s; z-index: 99; overflow-y: auto;
}
body[dir="rtl"] .sidebar { left: auto; right: 0; transform: translateX(100%); }
.sidebar.active { transform: translateX(0); }
body[dir="rtl"] .sidebar.active { transform: translateX(0); }

.sidebar-nav { padding: 20px 0; }
.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 20px; color: var(--text-primary);
    text-decoration: none; transition: background 0.3s;
    border-left: 3px solid transparent;
}
body[dir="rtl"] .nav-item { border-left: none; border-right: 3px solid transparent; }
.nav-item:hover { background: var(--bg-color); }
.nav-item.active { background: rgba(102,126,234,0.1); color: var(--primary-color); border-color: var(--primary-color); }
.nav-item i { width: 20px; text-align: center; }

.main-content { margin-top: 56px; padding: 16px; min-height: calc(100vh - 56px); box-sizing: border-box; }
.page { display: none; }
.page.active { display: block; }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.page-header h2 { font-size: 22px; font-weight: 600; color: var(--text-primary); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white; border: none; padding: 12px 20px; border-radius: 10px;
    font-size: 15px; font-weight: 600; cursor: pointer;
    display: inline-flex; align-items: center; gap: 8px;
    min-height: 44px; box-sizing: border-box;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn-secondary {
    background: var(--bg-color); color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 16px; border-radius: 8px; font-size: 14px;
    cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
    min-height: 40px; box-sizing: border-box;
}
.btn-secondary:hover { background: var(--border-color); }

.btn-danger { background: var(--danger-color); color: white; border: none; padding: 8px 14px; border-radius: 8px; font-size: 13px; cursor: pointer; min-height: 36px; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px; margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg); padding: 16px; border-radius: 12px;
    box-shadow: var(--shadow); border-left: 4px solid var(--primary-color);
}
body[dir="rtl"] .stat-card { border-left: none; border-right: 4px solid var(--primary-color); }
.stat-card.income { border-color: var(--success-color); }
.stat-card.expense { border-color: var(--danger-color); }
.stat-card.profit { border-color: var(--info-color); }
.stat-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }
.stat-value { font-size: 20px; font-weight: 700; color: var(--text-primary); word-break: break-all; }

.table-container {
    background: var(--card-bg); border-radius: 12px;
    box-shadow: var(--shadow); overflow-x: auto; overflow-y: visible;
    -webkit-overflow-scrolling: touch;
}

.data-table { width: 100%; min-width: 500px; border-collapse: collapse; }
.data-table thead { background: var(--bg-color); }
.data-table th { padding: 12px 10px; text-align: right; font-weight: 600; font-size: 13px; color: var(--text-primary); border-bottom: 2px solid var(--border-color); white-space: nowrap; }
body[dir="ltr"] .data-table th { text-align: left; }
.data-table td { padding: 10px; border-bottom: 1px solid var(--border-color); color: var(--text-secondary); font-size: 13px; }
.data-table tbody tr:hover { background: var(--bg-color); }
.data-table .actions { display: flex; gap: 6px; flex-wrap: wrap; }
.data-table .btn-secondary, .data-table .btn-danger { padding: 6px 10px; font-size: 12px; min-height: 36px; }

.filters-bar {
    background: var(--card-bg); padding: 16px; border-radius: 12px;
    box-shadow: var(--shadow); margin-bottom: 16px;
    display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end;
}
.filters-bar .form-control { min-width: 0; }
.filter-group { flex: 1; min-width: 120px; }
.filter-group label { display: block; margin-bottom: 5px; font-size: 13px; color: var(--text-secondary); }

.form-control {
    width: 100%; padding: 10px 14px;
    border: 2px solid var(--border-color); border-radius: 8px;
    font-size: 14px;
}
.form-control:focus { outline: none; border-color: var(--primary-color); }

.modal {
    display: none; position: fixed; top: 0; left: 0;
    width: 100%; height: 100%; background: rgba(0,0,0,0.5);
    z-index: 1000; justify-content: center; align-items: center;
    padding: 16px; overflow-y: auto; box-sizing: border-box;
}
.modal.active { display: flex; align-items: center; justify-content: center; }

.modal-content {
    background: var(--card-bg); border-radius: 16px;
    width: 100%; max-width: 560px; min-width: 280px;
    max-height: 90vh; margin: auto;
    overflow-y: auto; overflow-x: hidden;
    box-shadow: var(--shadow-lg); flex-shrink: 0;
}

.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 20px; border-bottom: 1px solid var(--border-color); }
.modal-header h3 { font-size: 20px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 28px; color: var(--text-secondary); cursor: pointer; padding: 0; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; }
.modal-close:hover { background: var(--bg-color); }

.modal-form { padding: 20px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; margin-bottom: 15px; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 500; color: var(--text-primary); }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border-color); }
body[dir="rtl"] .modal-actions { flex-direction: row-reverse; }

.reports-tabs { display: flex; gap: 10px; margin-bottom: 20px; border-bottom: 2px solid var(--border-color); }
.report-tab { background: none; border: none; padding: 12px 24px; font-size: 16px; color: var(--text-secondary); cursor: pointer; border-bottom: 3px solid transparent; transition: all 0.3s; }
.report-tab.active { color: var(--primary-color); border-bottom-color: var(--primary-color); font-weight: 600; }
.report-filters { background: var(--card-bg); padding: 20px; border-radius: 12px; box-shadow: var(--shadow); margin-bottom: 20px; }
.report-content { background: var(--card-bg); padding: 20px; border-radius: 12px; box-shadow: var(--shadow); }

.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.category-card { background: var(--card-bg); padding: 20px; border-radius: 12px; box-shadow: var(--shadow); border-left: 4px solid var(--primary-color); }
body[dir="rtl"] .category-card { border-left: none; border-right: 4px solid var(--primary-color); }
.category-card.income { border-color: var(--success-color); }
.category-card.expense { border-color: var(--danger-color); }
.category-name { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.category-type { font-size: 12px; color: var(--text-secondary); text-transform: uppercase; }

.settings-container { background: var(--card-bg); padding: 30px; border-radius: 12px; box-shadow: var(--shadow); }
.settings-section { margin-bottom: 30px; padding-bottom: 30px; border-bottom: 1px solid var(--border-color); }
.settings-section:last-child { border-bottom: none; }
.settings-section h3 { font-size: 20px; margin-bottom: 15px; color: var(--text-primary); }

.charts-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 20px; margin-top: 30px; }
.chart-card { background: var(--card-bg); padding: 24px; border-radius: 12px; box-shadow: var(--shadow); }
.chart-card h3 { font-size: 18px; margin-bottom: 20px; color: var(--text-primary); }

.text-center { text-align: center; }
.hidden { display: none !important; }

/* تبلت و صفحه متوسط */
@media (min-width: 577px) and (max-width: 992px) {
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
    .app-header h1 { font-size: 16px; }
    .main-content { padding: 16px; }
    .page-header h2 { font-size: 20px; }
}

/* موبایل و تبلت کوچک */
@media (max-width: 768px) {
    .sidebar { width: 100%; }
    body[dir="rtl"] .sidebar { right: 0; left: auto; }
    .main-content { padding: 12px; margin-top: 52px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-card { padding: 12px; }
    .stat-value { font-size: 16px; }
    .stat-label { font-size: 11px; }
    .charts-container { grid-template-columns: 1fr; }
    .filters-bar { flex-direction: column; gap: 10px; }
    .filters-bar .form-control, .filters-bar .btn-secondary, .filters-bar .btn-primary { width: 100%; max-width: 100%; }
    .filter-group { width: 100%; }
    .form-row { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: stretch; gap: 12px; }
    .page-header .btn-primary { width: 100%; justify-content: center; }
    .reports-tabs { flex-wrap: wrap; gap: 8px; }
    .report-tab { padding: 10px 16px; font-size: 14px; }
    .modal { padding: 10px; align-items: flex-start; }
    .modal-content, .modal-content.modal-wide {
        max-width: 100%; max-height: 85vh; margin: 10px auto;
    }
    .modal-header, .modal-form { padding: 16px; }
    .data-table { min-width: 400px; }
    .app-header { padding: 10px 12px; }
    .app-header h1 { font-size: 16px; }
    .page-header h2 { font-size: 18px; }
}

/* موبایل کوچک */
@media (max-width: 576px) {
    .login-card { padding: 24px; margin: 10px; }
    .login-header h1 { font-size: 20px; }
    .main-content { padding: 10px; }
    .stats-grid { grid-template-columns: 1fr; }
    .stat-value { font-size: 18px; }
    .page-header h2 { font-size: 17px; }
    .table-container { margin: 0 -10px; border-radius: 0; }
    .data-table th, .data-table td { padding: 8px 6px; font-size: 12px; }
    .report-filters { flex-direction: column; }
    .report-filters .form-control, .report-filters .btn-primary, .report-filters .btn-secondary { width: 100%; }
}

/* دسکتاپ بزرگ */
@media (min-width: 993px) {
    .sidebar { width: 250px; }
    .sidebar.active { transform: translateX(0); }
    body[dir="rtl"] .sidebar.active { transform: translateX(0); }
    .main-content { margin-left: 0; }
    body[dir="rtl"] .main-content { margin-right: 0; }
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
    .stat-value { font-size: 24px; }
}