:root {
    --primary: #2563eb;
    --success: #16a34a;
    --warning: #eab308;
    --danger: #dc2626;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
}

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

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

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

/* Sidebar */
.sidebar {
    width: 220px;
    background: #1e293b;
    color: white;
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar h2 {
    padding: 0 20px;
    font-size: 18px;
    margin-bottom: 30px;
    color: #60a5fa;
}

.sidebar a {
    display: block;
    padding: 10px 20px;
    color: #cbd5e1;
    text-decoration: none;
    transition: background 0.2s;
}

.sidebar a:hover, .sidebar a.active {
    background: #334155;
    color: white;
}

/* Main content */
.main {
    margin-left: 220px;
    padding: 30px;
    flex: 1;
    min-width: 0;
}

h1 { font-size: 24px; margin-bottom: 20px; }

/* Cards */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .label {
    font-size: 13px;
    color: var(--muted);
    margin-top: 4px;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

th, td { padding: 12px 16px; text-align: left; }
th { background: #f1f5f9; font-weight: 600; font-size: 13px; color: var(--muted); text-transform: uppercase; }
td { border-top: 1px solid var(--border); }
tr:hover td { background: #f8fafc; }

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge.online { background: #dcfce7; color: #166534; }
.badge.offline { background: #f1f5f9; color: #475569; }
.badge.on_break { background: #fef9c3; color: #854d0e; }
.badge.idle { background: #ffedd5; color: #9a3412; }

.badge.high { background: #fecaca; color: #991b1b; }
.badge.medium { background: #fef9c3; color: #854d0e; }
.badge.low { background: #dcfce7; color: #166534; }

.badge.todo { background: #f1f5f9; color: #475569; }
.badge.in_progress { background: #dbeafe; color: #1e40af; }
.badge.done { background: #dcfce7; color: #166534; }

/* Screenshot grid */
.ss-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin: 16px 0;
}

.ss-card {
    background: var(--card);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.ss-card img {
    width: 100%;
    height: 130px;
    object-fit: cover;
    cursor: pointer;
}

.ss-card .ss-info {
    padding: 8px;
    font-size: 12px;
    color: var(--muted);
}

/* Activity chart */
.activity-chart {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 120px;
    padding: 16px;
    background: var(--card);
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin: 16px 0;
}

.bar {
    flex: 1;
    border-radius: 3px 3px 0 0;
    min-width: 10px;
    position: relative;
    transition: height 0.3s;
}

.bar:hover::after {
    content: attr(data-label);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    white-space: nowrap;
}

/* Task board */
.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.board-col {
    background: #f1f5f9;
    border-radius: 10px;
    padding: 16px;
    min-height: 200px;
}

.board-col h3 {
    font-size: 14px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.task-card {
    background: var(--card);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

.task-card .title { font-weight: 600; margin-bottom: 4px; }
.task-card .meta { font-size: 12px; color: var(--muted); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.2s;
}

.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--primary); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }

/* Modal / Dialog */
dialog {
    border: none;
    border-radius: 12px;
    padding: 24px;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

dialog::backdrop { background: rgba(0,0,0,0.5); }

dialog h3 { margin-bottom: 16px; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: var(--muted); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
}

/* Login page */
.login-container {
    max-width: 360px;
    margin: 100px auto;
    padding: 30px;
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.login-container h1 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 6px;
}

.login-container p { text-align: center; color: var(--muted); margin-bottom: 24px; }
.login-container .form-group { margin-bottom: 16px; }
.login-container .btn { width: 100%; padding: 12px; font-size: 16px; }
.error-msg { color: var(--danger); text-align: center; margin-bottom: 12px; font-size: 14px; }

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border-bottom: 2px solid var(--border);
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    color: var(--muted);
    font-weight: 500;
}

.tab.active {
    border-bottom-color: var(--primary);
    color: var(--primary);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Links */
a { color: var(--primary); }
a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; }
    .board { grid-template-columns: 1fr; }
    .stats-row { grid-template-columns: 1fr; }
}