:root {
    --bg-base: #09090b;
    --bg-surface: #18181b;
    --bg-surface-hover: #27272a;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    
    --success: #22c55e;
    --error: #ef4444;
    --warning: #eab308;
    
    --border: rgba(255,255,255,0.1);
    --border-highlight: rgba(255,255,255,0.2);
    --radius: 12px;
    --radius-sm: 8px;
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.6);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1, h2, h3 { font-weight: 600; }
h1 { font-size: 24px; margin-bottom: 8px; }
h2 { font-size: 20px; margin-bottom: 16px; border-bottom: 1px solid var(--border); padding-bottom: 12px; }
p { color: var(--text-secondary); margin-bottom: 16px; }

.hidden { display: none !important; }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-warning { color: var(--warning); }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 18px; font-size: 14px; font-weight: 500;
    border-radius: var(--radius-sm); border: none; cursor: pointer;
    transition: all 0.2s ease; background: var(--bg-surface-hover);
    color: var(--text-primary); border: 1px solid var(--border);
}
.btn:hover { background: var(--border-highlight); }
.btn-primary { background: var(--accent); color: white; border: 1px solid transparent; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4); }
.btn-success { background: rgba(34, 197, 94, 0.2); color: var(--success); border: 1px solid rgba(34, 197, 94, 0.3); }
.btn-success:hover { background: rgba(34, 197, 94, 0.3); }
.btn-error { background: rgba(239, 68, 68, 0.2); color: var(--error); border: 1px solid rgba(239, 68, 68, 0.3); }
.btn-error:hover { background: rgba(239, 68, 68, 0.3); }

.form-group { margin-bottom: 16px; display: flex; flex-direction: column; }
.form-group label { font-size: 13px; margin-bottom: 6px; color: var(--text-secondary); font-weight: 500; }
input, select, textarea {
    background: var(--bg-base); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 12px; color: var(--text-primary); font-family: inherit; font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2); }

.app-layout { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { background: var(--bg-surface); border-right: 1px solid var(--border); padding: 24px 16px; display: flex; flex-direction: column; }
.sidebar-header { margin-bottom: 32px; padding: 0 8px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.nav-item {
    padding: 10px 12px; border-radius: var(--radius-sm); color: var(--text-secondary);
    text-decoration: none; cursor: pointer; font-weight: 500; transition: all 0.2s;
}
.nav-item:hover { background: var(--bg-surface-hover); color: var(--text-primary); }
.nav-item.active { background: var(--accent); color: white; }
.sidebar-footer { padding-top: 16px; border-top: 1px solid var(--border); }

.main-content { padding: 40px; overflow-y: auto; }

.glass-card { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }

.auth-container { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-card { width: 100%; max-width: 400px; animation: fadeUp 0.4s ease forwards; }

.table-wrapper { overflow-x: auto; margin-top: 16px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; text-align: left; }
th { background: var(--bg-surface-hover); padding: 12px 16px; font-size: 12px; text-transform: uppercase; color: var(--text-secondary); border-bottom: 1px solid var(--border); letter-spacing: 0.05em; }
td { padding: 16px; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

.badge { padding: 4px 10px; border-radius: 99px; font-size: 12px; font-weight: 500; }
.badge-pending { background: rgba(234, 179, 8, 0.2); color: var(--warning); border: 1px solid rgba(234, 179, 8, 0.4); }
.badge-approved { background: rgba(34, 197, 94, 0.2); color: var(--success); border: 1px solid rgba(34, 197, 94, 0.4); }
.badge-rejected { background: rgba(239, 68, 68, 0.2); color: var(--error); border: 1px solid rgba(239, 68, 68, 0.4); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate-fade { animation: fadeUp 0.3s ease forwards; }

.toast-container { position: fixed; bottom: 24px; right: 24px; display: flex; flex-direction: column; gap: 8px; z-index: 50; }
.toast { background: var(--bg-surface); border: 1px solid var(--border); color: var(--text-primary); padding: 12px 20px; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); font-size: 14px; animation: slideIn 0.3s ease forwards; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Calendar Grid UI */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-top: 16px;
}
.week-label {
    grid-column: span 7;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin: 12px 0 4px 0;
    border-bottom: 1px solid var(--border);
    padding-bottom: 6px;
}
.calendar-day {
    background: var(--bg-surface-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    transition: all 0.2s;
}
.calendar-day:hover {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
}
.calendar-day.clickable {
    cursor: pointer;
}
.calendar-day.is-today {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
    background: rgba(99, 102, 241, 0.1);
}
.calendar-day.is-selected {
    border-color: var(--success);
    box-shadow: 0 0 0 1px var(--success);
    background: rgba(34, 197, 94, 0.1);
}
.cal-head {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
}
.cal-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.cal-job-tag {
    font-size: 11px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    padding: 3px 6px;
    border-radius: 4px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all 0.2s;
}
.cal-job-tag.clickable:hover {
    background: var(--accent);
    border-color: var(--accent-hover);
    color: white;
}
.cal-total-hours {
    margin-top: auto;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    text-align: right;
}
.cal-total-amt {
    margin-top: auto;
    font-size: 12px;
    font-weight: 600;
    color: var(--success);
    text-align: right;
}