:root {
    --bg: #f4f5f9;
    --card-bg: #ffffff;
    --text: #1a1c23;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --ontime: #16a34a;
    --late: #d97706;
    --missed: #dc2626;
    --pending: #6b7280;
    --extra: #7c3aed;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans Devanagari", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

/* ---------- Top bar ---------- */
.topbar {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 10px 20px;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 50;
}
.topbar-left { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.logo-mark {
    background: var(--primary); color: #fff; font-size: 12px; font-weight: 800;
    padding: 6px 8px; border-radius: 6px; letter-spacing: 0.5px;
}
.logo-text { font-size: 14px; color: var(--text-muted); font-weight: 600; }

.main-nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.main-nav a {
    padding: 8px 12px; border-radius: 8px; color: var(--text-muted); font-weight: 600; font-size: 13.5px;
}
.main-nav a:hover { background: var(--bg); color: var(--text); }
.main-nav a.active { background: var(--primary); color: #fff; }

.topbar-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.user-chip { font-size: 13px; color: var(--text-muted); }
.user-chip small { opacity: 0.7; }

.app-main { flex: 1; padding: 20px; max-width: 1280px; width: 100%; margin: 0 auto; }

/* ---------- Cards ---------- */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    margin-bottom: 18px;
}
.card h2, .card h3 { margin-top: 0; }

.page-title { font-size: 22px; font-weight: 800; margin: 4px 0 18px; }
.page-subtitle { color: var(--text-muted); font-size: 13.5px; margin-top: -12px; margin-bottom: 18px; }

/* ---------- Summary cards ---------- */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.summary-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
    text-align: center;
    border-top: 4px solid var(--border);
}
.summary-card .num { font-size: 28px; font-weight: 800; }
.summary-card .label { font-size: 12.5px; color: var(--text-muted); font-weight: 600; margin-top: 2px; }
.summary-card.ontime { border-top-color: var(--ontime); }
.summary-card.late { border-top-color: var(--late); }
.summary-card.missed { border-top-color: var(--missed); }
.summary-card.pending { border-top-color: var(--pending); }

/* ---------- Badges ---------- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
}
.badge-ontime  { background: var(--ontime); }
.badge-late    { background: var(--late); }
.badge-missed  { background: var(--missed); }
.badge-pending { background: var(--pending); }
.badge-extra   { background: var(--extra); }

.channel-tag {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 640px; }
table.data-table th, table.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
}
table.data-table th {
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    font-weight: 700;
    background: #fafbfc;
}
table.data-table tr:hover td { background: #fafbff; }
.thumb-cell img { width: 80px; border-radius: 6px; display: block; }
.row-missed td { background: #fef2f2; }

/* ---------- Forms ---------- */
label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 5px; margin-top: 14px; }
input[type=text], input[type=email], input[type=password], input[type=url], input[type=date], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    background: #fff;
    color: var(--text);
    font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.btn {
    display: inline-block;
    padding: 9px 16px;
    border-radius: 8px;
    border: none;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    background: var(--primary);
    color: #fff;
}
.btn:hover { background: var(--primary-dark); }
.btn-sm { padding: 6px 10px; font-size: 12.5px; }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn-block { width: 100%; }
.btn-danger { background: var(--missed); }

/* ---------- Filters ---------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.chip {
    padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border);
    font-size: 12.5px; font-weight: 600; cursor: pointer; background: #fff; color: var(--text-muted);
}
.chip.active { background: var(--text); color: #fff; border-color: var(--text); }

/* ---------- Login page ---------- */
.login-wrap {
    min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.login-card { max-width: 380px; width: 100%; }
.login-title { font-size: 20px; font-weight: 800; margin-bottom: 4px; }
.login-sub { color: var(--text-muted); font-size: 13px; margin-bottom: 18px; }
.error-msg { background: #fef2f2; color: var(--missed); padding: 10px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }
.success-msg { background: #f0fdf4; color: var(--ontime); padding: 10px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }

/* ---------- Calendar grid ---------- */
.cal-grid { display: grid; grid-template-columns: 90px repeat(7, 1fr); gap: 6px; min-width: 900px; }
.cal-head { font-weight: 700; font-size: 12.5px; text-align: center; padding: 8px 4px; color: var(--text-muted); }
.cal-channel-label { display: flex; align-items: center; font-weight: 700; font-size: 12.5px; padding: 4px; }
.cal-cell { background: #fafbfc; border-radius: 6px; padding: 6px; min-height: 60px; }
.cal-slot { font-size: 11px; padding: 4px 6px; border-radius: 5px; margin-bottom: 4px; color: #fff; line-height: 1.3; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
    .topbar { padding: 10px 12px; }
    .main-nav { order: 3; width: 100%; justify-content: flex-start; }
    .app-main { padding: 12px; }
    .thumb-cell img { width: 56px; }
}