:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #e0e7ff;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --bg: #f8fafc;
    --sidebar-bg: #1e1b4b;
    --sidebar-text: #c7d2fe;
    --sidebar-active: #4f46e5;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

/* ── LAYOUT ── */
.app-wrapper { display: flex; min-height: 100vh; }
.sidebar { width: 250px; background: var(--sidebar-bg); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh; z-index: 1000; transition: transform 0.3s; overflow-y: auto; }
.main-content { margin-left: 250px; flex: 1; display: flex; flex-direction: column; min-height: 100vh; }

/* ── SIDEBAR ── */
.sidebar-brand { padding: 1.5rem 1.25rem; border-bottom: 1px solid rgba(255,255,255,.1); }
.sidebar-brand h2 { color: #fff; font-size: 1rem; font-weight: 700; line-height: 1.3; }
.sidebar-brand small { color: var(--sidebar-text); font-size: 0.75rem; display: block; margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 1rem 0; }
.nav-section-label { color: rgba(255,255,255,.35); font-size: 0.65rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 0.75rem 1.25rem 0.25rem; }
.sidebar-nav a { display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 1.25rem; color: var(--sidebar-text); text-decoration: none; font-size: 0.875rem; transition: all .2s; border-left: 3px solid transparent; }
.sidebar-nav a:hover { background: rgba(255,255,255,.08); color: #fff; border-left-color: var(--primary); }
.sidebar-nav a.active { background: rgba(79,70,229,.25); color: #fff; border-left-color: var(--primary); font-weight: 600; }
.sidebar-nav a svg, .sidebar-nav a i { width: 18px; text-align: center; opacity: .75; }
.sidebar-bottom { padding: 1rem 1.25rem; border-top: 1px solid rgba(255,255,255,.1); }
.user-info { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; }
.user-avatar { width: 36px; height: 36px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: .9rem; flex-shrink: 0; }
.user-name { color: #fff; font-size: .825rem; font-weight: 600; }
.user-role { color: var(--sidebar-text); font-size: .7rem; }
.btn-logout { display: block; width: 100%; padding: .5rem; text-align: center; background: rgba(255,255,255,.08); color: var(--sidebar-text); text-decoration: none; border-radius: 6px; font-size: .8rem; border: none; cursor: pointer; transition: all .2s; }
.btn-logout:hover { background: rgba(239,68,68,.2); color: #fca5a5; }

.support-info { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,0.05); }
.support-link { display: flex; align-items: center; gap: 0.5rem; color: rgba(255,255,255,0.4); text-decoration: none; font-size: 0.7rem; transition: color 0.2s; }
.support-link:hover { color: var(--sidebar-text); }
.support-link svg { width: 14px; height: 14px; opacity: 0.6; }


/* ── TOP BAR ── */
.topbar { background: #fff; border-bottom: 1px solid var(--border); padding: .85rem 1.5rem; display: flex; align-items: center; gap: 1rem; box-shadow: var(--shadow); }
.topbar-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; color: var(--text); }
.topbar-title { font-size: 1.05rem; font-weight: 600; color: var(--text); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: .75rem; }

/* ── MAIN ── */
.page-body { flex: 1; padding: 1.5rem; }

/* ── ALERTS ── */
.alert { padding: .85rem 1.25rem; border-radius: 8px; margin-bottom: 1rem; display: flex; align-items: flex-start; gap: .75rem; font-size: .875rem; }
.alert-success { background: #ecfdf5; border: 1px solid #a7f3d0; color: #065f46; }
.alert-danger  { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }
.alert-info    { background: #eff6ff; border: 1px solid #bfdbfe; color: #1e40af; }
.alert-warning { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }

/* ── STAT CARDS ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--card-bg); border-radius: 12px; padding: 1.25rem; box-shadow: var(--shadow); display: flex; align-items: center; gap: 1rem; transition: transform .2s, box-shadow .2s; }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; flex-shrink: 0; }
.stat-icon.indigo { background: #e0e7ff; color: var(--primary); }
.stat-icon.green  { background: #d1fae5; color: var(--success); }
.stat-icon.blue   { background: #dbeafe; color: var(--info); }
.stat-icon.orange { background: #ffedd5; color: #f97316; }
.stat-icon.red    { background: #fee2e2; color: var(--danger); }
.stat-value { font-size: 1.75rem; font-weight: 700; color: var(--text); line-height: 1; }
.stat-label { font-size: .75rem; color: var(--text-muted); margin-top: 2px; }

/* ── CARDS ── */
.card { background: var(--card-bg); border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; }
.card-header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.card-header h5 { font-size: .95rem; font-weight: 600; color: var(--text); margin: 0; }
.card-body { padding: 1.25rem; }

/* ── TABLE ── */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
th { background: #f8fafc; padding: .75rem 1rem; text-align: left; font-size: .75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; border-bottom: 2px solid var(--border); }
td { padding: .75rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8fafc; }

/* ── BADGES ── */
.badge { display: inline-flex; align-items: center; gap: .25rem; padding: .25rem .65rem; border-radius: 999px; font-size: .7rem; font-weight: 600; }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger  { background: #fee2e2; color: #991b1b; }
.badge-info    { background: #dbeafe; color: #1e40af; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-secondary { background: var(--border); color: var(--text-muted); }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .5rem 1rem; border-radius: 8px; font-size: .875rem; font-weight: 500; cursor: pointer; border: none; text-decoration: none; transition: all .2s; white-space: nowrap; }
.btn-primary   { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success   { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; color: #fff; }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; color: #fff; }
.btn-warning   { background: var(--warning); color: #fff; }
.btn-secondary { background: #f1f5f9; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-sm { padding: .35rem .75rem; font-size: .78rem; }
.btn-outline-primary { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: #fff; }
.btn-group { display: flex; gap: .35rem; flex-wrap: wrap; }

/* ── FORMS ── */
.form-group { margin-bottom: 1rem; }
label { display: block; font-size: .825rem; font-weight: 500; color: var(--text); margin-bottom: .35rem; }
.form-control, .form-select { width: 100%; padding: .55rem .85rem; border: 1px solid var(--border); border-radius: 8px; font-size: .875rem; color: var(--text); background: #fff; transition: border-color .2s, box-shadow .2s; }
.form-control:focus, .form-select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,.1); }
.form-control.is-invalid { border-color: var(--danger); }
.text-danger { color: var(--danger); font-size: .78rem; margin-top: .2rem; }
.form-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.form-check { display: flex; align-items: center; gap: .5rem; font-size: .875rem; cursor: pointer; }
.form-check input[type=checkbox], .form-check input[type=radio] { width: 16px; height: 16px; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 100px; }

/* ── TOGGLE SWITCH ── */
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; cursor: pointer; inset: 0; background: #cbd5e1; border-radius: 24px; transition: .3s; }
.toggle-slider:before { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: .3s; }
input:checked + .toggle-slider { background: var(--success); }
input:checked + .toggle-slider:before { transform: translateX(20px); }

/* ── FILTER BAR ── */
.filter-bar { background: #fff; border-radius: 12px; padding: 1rem 1.25rem; box-shadow: var(--shadow); margin-bottom: 1.25rem; }
.filter-bar form { display: flex; flex-wrap: wrap; gap: .75rem; align-items: flex-end; }
.filter-bar .form-group { margin-bottom: 0; }

/* ── PAGE HEADER ── */
.page-header { margin-bottom: 1.25rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .75rem; }
.page-header h1 { font-size: 1.35rem; font-weight: 700; color: var(--text); }
.page-header p { color: var(--text-muted); font-size: .875rem; margin-top: 2px; }

/* ── ATTENDANCE TABLE ── */
.att-status { display: flex; gap: .5rem; align-items: center; }
.att-radio-label { display: flex; align-items: center; gap: .3rem; cursor: pointer; font-size: .8rem; padding: .3rem .6rem; border-radius: 6px; border: 1px solid var(--border); transition: all .2s; }
.att-radio-label:has(input:checked).present { background: #d1fae5; border-color: #10b981; color: #065f46; }
.att-radio-label:has(input:checked).absent  { background: #fee2e2; border-color: #ef4444; color: #991b1b; }
.att-radio-label input { display: none; }
.bulk-btn { display: flex; gap: .5rem; margin-bottom: .75rem; }

/* ── LOGIN ── */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #1e1b4b 0%, #3730a3 50%, #4f46e5 100%); padding: 1rem; }
.login-card { width: 100%; max-width: 420px; background: #fff; border-radius: 20px; padding: 2.5rem 2rem; box-shadow: 0 25px 50px rgba(0,0,0,.25); }
.login-logo { text-align: center; margin-bottom: 2rem; }
.login-logo .icon { width: 64px; height: 64px; background: var(--primary-light); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; font-size: 1.75rem; }
.login-logo h1 { font-size: 1.3rem; font-weight: 700; color: var(--text); }
.login-logo p { color: var(--text-muted); font-size: .875rem; }

/* ── NOTICE CARD ── */
.notice-item { border: 1px solid var(--border); border-radius: 10px; padding: 1rem; margin-bottom: .75rem; transition: border-color .2s; }
.notice-item:hover { border-color: var(--primary); }
.notice-item h6 { font-weight: 600; font-size: .9rem; margin-bottom: .25rem; }
.notice-item p { font-size: .825rem; color: var(--text-muted); margin: 0; }
.notice-meta { display: flex; gap: .75rem; align-items: center; margin-top: .5rem; flex-wrap: wrap; }

/* ── PROMOTION ── */
.promotion-warning { background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px; padding: 1rem; margin-bottom: 1rem; }

/* ── FILTER BAR ENHANCEMENTS ── */
.filter-row { display: flex; align-items: flex-end; gap: 1rem; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 5px; }
.filter-row .form-group { margin-bottom: 0; min-width: 150px; flex: 1; }
.filter-row .btn { height: 38px; }

/* ── LANDING PAGE ── */
.landing-page { min-height: 100vh; background: #fff; color: var(--text); overflow-x: hidden; }
.landing-hero { position: relative; padding: 6rem 1.5rem; background: linear-gradient(135deg, #1e1b4b 0%, #3730a3 50%, #4f46e5 100%); color: #fff; text-align: center; clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%); }
.landing-hero h1 { font-size: 3.5rem; font-weight: 800; margin-bottom: 1.5rem; letter-spacing: -0.02em; animation: fadeInDown 0.8s ease-out; }
.landing-hero p { font-size: 1.25rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 2.5rem; line-height: 1.6; animation: fadeInUp 0.8s ease-out; }
.hero-btns { display: flex; gap: 1rem; justify-content: center; animation: fadeInUp 1s ease-out; }
.btn-premium { padding: 1rem 2rem; font-size: 1rem; font-weight: 600; border-radius: 12px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.btn-premium.primary { background: #fff; color: var(--primary); }
.btn-premium.primary:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); }
.btn-premium.outline { border: 2px solid rgba(255,255,255,0.3); color: #fff; }
.btn-premium.outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

.features-section { padding: 6rem 1.5rem; max-width: 1200px; margin: 0 auto; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2.5rem; margin-top: 4rem; }
.feature-card { padding: 2.5rem; background: #fff; border-radius: 20px; border: 1px solid var(--border); transition: all 0.3s; }
.feature-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.05); border-color: var(--primary-light); }
.feature-icon { font-size: 2.5rem; margin-bottom: 1.5rem; }
.feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1rem; }
.feature-card p { color: var(--text-muted); line-height: 1.6; }

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .topbar-toggle { display: flex; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .landing-hero h1 { font-size: 2.5rem; }
    .filter-row { flex-wrap: wrap; }
    .filter-row .form-group { min-width: 100%; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .btn-group { flex-direction: column; }
    .page-body { padding: 1rem; }
}