/* HK Task Management System - Styles */
:root {
    --primary: #1a365d;
    --primary-light: #2c5282;
    --accent: #3182ce;
    --success: #38a169;
    --warning: #d69e2e;
    --danger: #e53e3e;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-300: #e2e8f0;
    --gray-500: #718096;
    --gray-700: #4a5568;
    --gray-800: #2d3748;
}

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

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    min-height: 100vh;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.login-box {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.login-box .subtitle {
    color: var(--gray-500);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

/* Layout */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--primary);
    color: white;
    padding: 1rem 0;
}

.sidebar-brand {
    padding: 1rem 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-nav {
    list-style: none;
    margin-top: 1rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    transition: all 0.2s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background: rgba(255,255,255,0.1);
    color: white;
}

.main-content {
    flex: 1;
    padding: 1.5rem;
    overflow-x: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-title { font-size: 1.5rem; font-weight: 600; }

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.25rem;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
}

.card-body { padding: 1.25rem; }

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 0.95rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(49,130,206,0.2);
}

.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 200px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-light);
}

.btn-success { background: var(--success); color: white; }
.btn-success:hover { filter: brightness(1.1); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { filter: brightness(1.1); }

.btn-secondary {
    background: var(--gray-300);
    color: var(--gray-800);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    background: var(--gray-100);
    font-weight: 600;
    color: var(--gray-700);
}

.table tbody tr:hover {
    background: var(--gray-100);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
}

.badge-success { background: #c6f6d5; color: #22543d; }
.badge-warning { background: #fefcbf; color: #744210; }
.badge-danger { background: #fed7d7; color: #742a2a; }
.badge-info { background: #bee3f8; color: #2c5282; }

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success { background: #c6f6d5; color: #22543d; }
.alert-danger { background: #fed7d7; color: #742a2a; }
.alert-warning { background: #fefcbf; color: #744210; }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.stat-card {
    background: white;
    padding: 1.25rem;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card .stat-value { font-size: 1.75rem; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { color: var(--gray-500); font-size: 0.9rem; }

/* User menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-menu span { font-size: 0.9rem; color: var(--gray-600); }
.user-menu .btn { padding: 0.375rem 0.75rem; }

/* Allocations grid */
.alloc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.alloc-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    padding: 1rem;
}

.alloc-card .task-title { font-weight: 600; color: var(--primary); margin-bottom: 0.5rem; }
.alloc-card .emp-list { font-size: 0.9rem; color: var(--gray-600); }