/* Reset & Base Variables */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Cairo', sans-serif;
}

:root {
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-muted: #666666;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    
    --success: #10b981;
    --success-bg: #d1fae5;
    
    --danger: #ef4444;
    --danger-bg: #fee2e2;
    --danger-hover: #dc2626;
    
    --warning: #f59e0b;
    --warning-bg: #fef3c7;
    
    --highlight-bg: #e0e7ff; /* For 1st day of month */
    
    --border-color: #e5e7eb;
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

/* Utilities */
.w-100 { width: 100%; }
.btn {
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
}
.primary-btn {
    background-color: var(--primary);
    color: white;
}
.primary-btn:hover { background-color: var(--primary-hover); }

.secondary-btn {
    background-color: #e5e7eb;
    color: #374151;
}
.secondary-btn:hover { background-color: #d1d5db; }

.danger-btn-outline {
    background-color: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
}
.danger-btn-outline:hover {
    background-color: var(--danger);
    color: white;
}

.action-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
    border-radius: 6px;
    margin-left: 0.5rem;
}
.edit-btn { background-color: #f3f4f6; color: #374151; border: 1px solid #d1d5db; }
.edit-btn:hover { background-color: #e5e7eb; }
.delete-btn { background-color: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
.delete-btn:hover { background-color: var(--danger); color: white; }

/* Login Screen */
#login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.login-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}
.login-card h2 {
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary);
}

/* Forms */
.input-group {
    margin-bottom: 1.25rem;
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-main);
}
.input-group input, .input-group textarea, .filters select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: #fff;
    transition: border-color 0.2s;
}
.input-group input:focus, .input-group textarea:focus, .filters select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
.error-msg {
    color: var(--danger);
    margin-top: 1rem;
    text-align: center;
    font-weight: 600;
}
.form-actions { display: flex; flex-direction: column; gap: 0.75rem; }

/* Dashboard Layout */
.top-nav {
    background-color: var(--card-bg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1rem 2rem;
}
.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.dashboard-content {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    border-top: 4px solid var(--primary);
}
.stat-card.success-card { border-top-color: var(--success); }
.stat-card.danger-card { border-top-color: var(--danger); }
.stat-card.warning-card { border-top-color: var(--warning); }
.stat-card h3 {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}
.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
}

/* Main Grid */
.main-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    align-items: start;
}
.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* Table Area */
.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.filters {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.filters select {
    width: auto;
    min-width: 150px;
}
.table-responsive {
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}
th, td {
    padding: 1rem;
    text-align: right;
    border-bottom: 1px solid var(--border-color);
}
th {
    background-color: #f8fafc;
    font-weight: 600;
    color: var(--text-muted);
}
tbody tr:hover {
    background-color: #f9fafb;
}

/* Status Badges */
.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: #b45309; }

/* 1st of month highlight */
.highlight-row {
    background-color: var(--highlight-bg) !important;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .dashboard-content { padding: 0 1rem; }
    .nav-content { flex-direction: column; gap: 1rem; text-align: center; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}