:root {
  font-family: Inter, system-ui, Arial, sans-serif;
  --bg-color: #f4f6f8;
  --text-color: #18202a;
  --card-bg: #ffffff;
  --card-border: #e0e4e8;
  --header-bg: #15191e;
  --header-text: #ffffff;
  --nav-bg: #ffffff;
  --nav-border: #dddddd;
  --input-bg: #ffffff;
  --input-border: #cfd5db;
  --table-th-bg: #f1f3f5;
  --table-border: #e8ebee;
  --brand: #ef6c25;
  --dark: #15191e;
  --green: #248a4b;
  --red: #c43d43;
  --amber: #d99012;
  --muted: #69727c;
  --subtle-bg: #f5f7f8;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
}

[data-theme="dark"] {
  --bg-color: #0f1318;
  --text-color: #e2e8f0;
  --card-bg: #1a202c;
  --card-border: #2d3748;
  --header-bg: #0b0e11;
  --header-text: #ffffff;
  --nav-bg: #1a202c;
  --nav-border: #2d3748;
  --input-bg: #2d3748;
  --input-border: #4a5568;
  --table-th-bg: #2d3748;
  --table-border: #4a5568;
  --muted: #a0aec0;
  --subtle-bg: #2d3748;
  --shadow: 0 4px 12px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg-color); color: var(--text-color); transition: background-color 0.2s, color 0.2s; }

header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: 14px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.brand-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #ffffff, #ef6c25);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-brand p { margin: 3px 0 0; color: #94a3b8; font-size: 12px; }

.header-controls { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.search-box { position: relative; width: 250px; }
.search-box input {
  height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: #ffffff;
  font-size: 13px;
}
.search-box input::placeholder { color: #94a3b8; }
.search-box input:focus { outline: none; border-color: var(--brand); background: rgba(255,255,255,0.15); }

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 6px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  max-height: 300px;
  overflow-y: auto;
  z-index: 100;
}
.search-item {
  padding: 10px 12px;
  border-bottom: 1px solid var(--card-border);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-color);
}
.search-item:hover { background: var(--subtle-bg); }
.search-item small { color: var(--muted); }

.header-control-group {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  padding: 0 8px;
  border-radius: 8px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.15);
}
.header-control-group label {
  color: #cbd5e1;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 700;
  margin: 0;
  white-space: nowrap;
}
.header-control-group select {
  height: 28px;
  padding: 0 6px;
  border-radius: 6px;
  border: none;
  background: rgba(255,255,255,0.15);
  color: #ffffff;
  font-size: 13px;
  font-weight: bold;
  cursor: pointer;
}
.header-control-group select option { background: #1e293b; color: #ffffff; }

.icon-btn {
  height: 36px;
  width: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 0;
  cursor: pointer;
  font-size: 15px;
}
.icon-btn:hover { background: rgba(255,255,255,0.2); }

.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 0 10px;
  border-radius: 8px;
  font-size: 13px;
  color: #fff;
}
.user-badge button.logout-btn {
  padding: 4px 8px;
  font-size: 11px;
  background: rgba(239, 68, 68, 0.85);
  color: #fff;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.user-badge button.logout-btn:hover { background: #dc2626; }

/* Password Field Wrapper & Eye Button */
.password-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}
.password-wrapper input {
  padding-right: 42px !important;
}
.eye-btn {
  position: absolute;
  right: 6px;
  background: transparent !important;
  border: none !important;
  padding: 6px !important;
  cursor: pointer;
  font-size: 16px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: none !important;
  transform: none !important;
}
.eye-btn:hover {
  opacity: 0.8;
  filter: none !important;
}

nav {
  padding: 10px 28px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  gap: 6px;
  overflow-x: auto;
  position: sticky;
  top: 0;
  z-index: 10;
}

button, .btn {
  border: 0;
  border-radius: 9px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
  background: var(--subtle-bg);
  color: var(--text-color);
  transition: background 0.15s, transform 0.1s;
}
button:hover { filter: brightness(0.95); }
button:active { transform: scale(0.98); }
button:disabled { opacity: 0.45; cursor: not-allowed; transform: none!important; }

nav button { white-space: nowrap; background: transparent; color: var(--text-color); }
nav button.active, .primary { background: var(--brand); color: #fff; }
.success { background: var(--green); color: #fff; }
.danger { background: var(--red); color: #fff; }
.warning { background: var(--amber); color: #fff; }
.ghost { background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text-color); }
.small { padding: 6px 9px; font-size: 12px; }

/* Export Buttons Bar */
.export-group { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.export-btn { padding: 6px 12px; border-radius: 8px; font-size: 12px; font-weight: bold; border: 1px solid var(--card-border); background: var(--subtle-bg); color: var(--text-color); }
.export-btn:hover { background: var(--brand); color: #fff; }

/* Container & Margin Fixes */
main {
  padding: 24px 32px;
  max-width: 1500px;
  margin: 0 auto;
  width: 100%;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.section-title-left { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.section-title h2 { margin: 0; font-size: 22px; }

.reminder-btn {
  background: #eef2ff!important;
  color: #4f46e5!important;
  border: 1px solid #c7d2fe;
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
[data-theme="dark"] .reminder-btn {
  background: #312e81!important;
  color: #c7d2fe!important;
  border-color: #4338ca;
}

.edit-badge {
  font-size: 11px;
  font-weight: bold;
  padding: 3px 8px;
  border-radius: 99px;
  background: #e2e8f0;
  color: #475569;
  display: inline-block;
}
.edit-badge.warn { background: #fef3c7; color: #92400e; }
.edit-badge.locked { background: #fee2e2; color: #991b1b; }
.edit-badge.admin { background: #dbeafe; color: #1e40af; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.dashboard-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.metric strong { display: block; font-size: 31px; }
.metric span, .muted { color: var(--muted); font-size: 13px; }
.metric.danger-card { border-left: 5px solid var(--red); }
.metric.success-card { border-left: 5px solid var(--green); }

.current-strip {
  background: var(--dark);
  color: #fff;
  border-radius: 14px;
  padding: 18px 22px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.empty {
  padding: 32px;
  background: var(--card-bg);
  border: 1px dashed var(--card-border);
  border-radius: 12px;
  text-align: center;
  color: var(--muted);
}

.list { display: grid; gap: 8px; }
.list-item {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--card-border);
}
.list-item:last-child { border-bottom: 0; }

.badge { display: inline-block; padding: 4px 8px; border-radius: 999px; background: var(--subtle-bg); font-size: 12px; }
.badge.ok { background: #e2f4e8; color: #176b36; }
.badge.bad { background: #fde7e8; color: #9a252b; }
.badge.warn { background: #fff0d9; color: #8b5200; }
.badge.dark { background: #232b34; color: #fff; }

/* Table Container & Margins */
.table-container {
  width: 100%;
  overflow-x: auto;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin-top: 10px;
}
table { width: 100%; border-collapse: collapse; background: var(--card-bg); }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--table-border); vertical-align: middle; }
th { background: var(--table-th-bg); font-size: 13px; color: var(--text-color); font-weight: 700; }

.actions { display: flex; gap: 7px; flex-wrap: wrap; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 1000;
}
.hidden { display: none !important; }
.modal-card {
  background: var(--card-bg);
  color: var(--text-color);
  border-radius: 14px;
  padding: 24px;
  max-width: 920px;
  width: 100%;
  max-height: 92vh;
  overflow: auto;
  position: relative;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.close { position: absolute; right: 14px; top: 12px; font-size: 24px; background: none; border: 0; color: var(--muted); cursor: pointer; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 700; color: var(--text-color); }
.full { grid-column: 1 / -1; }

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--input-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text-color);
  font: inherit;
}
textarea { min-height: 80px; }

.checklist { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 8px; }
.check { display: flex; flex-direction: row; align-items: center; gap: 8px; background: var(--subtle-bg); padding: 10px; border-radius: 99px; font-weight: 600; }
.check input { width: auto; }

.toolbar { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar label { min-width: 190px; }

/* Login Overlay */
.login-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  z-index: 2000;
  padding: 20px;
}
.login-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
}
.login-header { text-align: center; margin-bottom: 24px; }
.login-logo { font-size: 40px; margin-bottom: 8px; }
.login-header h2 { margin: 0; font-size: 22px; color: var(--text-color); }
.login-header p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.login-error { background: #fee2e2; color: #991b1b; padding: 10px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; text-align: center; }
.full-width-btn { width: 100%; margin-top: 12px; padding: 12px; }

/* SVG Dashboard Charts */
.chart-card { min-height: 240px; display: flex; flex-direction: column; justify-content: space-between; }
.svg-chart-container { width: 100%; height: 160px; margin-top: 10px; }

/* Live Countdown Widget */
.countdown-widget {
  background: linear-gradient(135deg, #ef6c25, #d94600);
  color: #fff;
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 14px rgba(239, 108, 37, 0.3);
}

/* Keyboard Attendance Styling */
.keyboard-hint-banner {
  background: #3b82f6;
  color: #fff;
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}
.kbd { background: rgba(0,0,0,0.25); padding: 2px 6px; border-radius: 4px; font-family: monospace; font-weight: bold; }
.attendance-row.focused {
  outline: 3px solid var(--brand);
  background: rgba(239, 108, 37, 0.08);
}

/* Bulk Actions Bar */
.bulk-action-bar {
  position: sticky;
  bottom: 20px;
  background: var(--dark);
  color: #fff;
  padding: 14px 20px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  z-index: 20;
  margin-top: 16px;
}

/* Reminder Comments Modal */
.comments-list { display: flex; flex-direction: column; gap: 10px; max-height: 300px; overflow-y: auto; margin-bottom: 15px; }
.comment-item { background: var(--subtle-bg); padding: 10px 12px; border-radius: 8px; font-size: 13px; border-left: 3px solid var(--brand); }
.comment-meta { font-size: 11px; color: var(--muted); margin-bottom: 4px; display: flex; justify-content: space-between; }

/* Faculty Calendar & Table */
.month-toolbar input[type=month] { min-width: 170px; }
.faculty-summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(285px, 1fr)); gap: 14px; margin-bottom: 18px; }
.faculty-summary-card { background: var(--card-bg); border: 2px solid var(--card-border); border-radius: 14px; padding: 16px; text-align: left; display: block; width: 100%; color: var(--text-color); }
.faculty-summary-card.selected { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(239,108,37,.12); }
.faculty-card-head { display: flex; flex-direction: column; gap: 4px; margin-bottom: 13px; }
.faculty-card-head b { font-size: 18px; }
.faculty-card-head small { color: var(--muted); }
.faculty-stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; }
.faculty-stat-row i { font-style: normal; background: var(--subtle-bg); border-radius: 99px; padding: 8px 5px; text-align: center; font-size: 11px; color: var(--muted); }
.faculty-stat-row strong { display: block; color: var(--text-color); font-size: 20px; }

.faculty-calendar-panel { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; padding: 20px; }
.faculty-calendar-header { display: flex; justify-content: space-between; align-items: center; gap: 15px; margin-bottom: 14px; }
.faculty-calendar-header h2, .faculty-calendar-header p { margin: 0; }
.faculty-calendar-header p { color: var(--muted); margin-top: 5px; }

.faculty-total-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-bottom: 16px; }
.faculty-total-strip span { background: var(--subtle-bg); border-radius: 10px; padding: 12px; text-align: center; color: var(--muted); }
.faculty-total-strip b { display: block; font-size: 22px; color: var(--text-color); }

.calendar-weekdays, .faculty-calendar-grid { display: grid; grid-template-columns: repeat(7, minmax(100px, 1fr)); gap: 8px; }
.calendar-weekdays { margin-bottom: 8px; }
.calendar-weekdays b { text-align: center; background: var(--subtle-bg); padding: 10px; border-radius: 99px; color: var(--text-color); }

.calendar-day { min-height: 128px; border: 2px solid var(--card-border); border-radius: 12px; padding: 10px; position: relative; background: var(--card-bg); cursor: pointer; user-select: none; transition: .15s; }
.calendar-day:hover:not(.locked) { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
.calendar-day.today { outline: 3px solid rgba(239,108,37,.4); }
.calendar-day.present { background: #e9f7ee; border-color: #8bc59d; color: #15803d; }
.calendar-day.absent { background: #fdebed; border-color: #e3979b; color: #b91c1c; }
.calendar-day.paid-holiday { background: #eef1fb; border-color: #aeb9da; color: #1e40af; }
.calendar-day.not-marked { background: var(--card-bg); border-style: dashed; }
.calendar-day.locked { background: var(--subtle-bg); color: var(--muted); cursor: not-allowed; }
[data-theme="dark"] .calendar-day.present { background: #064e3b; border-color: #059669; color: #a7f3d0; }
[data-theme="dark"] .calendar-day.absent { background: #7f1d1d; border-color: #dc2626; color: #fecaca; }
[data-theme="dark"] .calendar-day.paid-holiday { background: #1e3a8a; border-color: #3b82f6; color: #bfdbfe; }

.empty-day { visibility: hidden; }
.day-number { font-size: 24px; font-weight: 800; }
.day-status { font-weight: 800; margin-top: 12px; }
.day-times { font-size: 12px; margin-top: 8px; }
.late-flag { font-size: 11px; margin-top: 7px; padding: 4px 7px; background: #fff0d9; color: #875400; border-radius: 6px; display: inline-block; }

.attendance-list { display: grid; gap: 9px; }
.attendance-row { display: grid; grid-template-columns: minmax(180px, 1fr) repeat(3, 110px); align-items: center; gap: 10px; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 11px; padding: 12px 16px; }

.attendance-choice { background: var(--subtle-bg)!important; color: var(--muted)!important; border: 2px solid var(--card-border); opacity: 0.8; display: flex; align-items: center; justify-content: center; gap: 7px; }
.attendance-choice .choice-dot { width: 10px; height: 10px; border-radius: 50%; background: #c9cfd4; }
.attendance-choice.present.selected { background: #e5f6eb!important; color: #176b36!important; border-color: #248a4b; opacity: 1; }
.attendance-choice.present.selected .choice-dot { background: #248a4b; }
.attendance-choice.absent.selected { background: #fde9ea!important; color: #9a252b!important; border-color: #c43d43; opacity: 1; }
.attendance-choice.absent.selected .choice-dot { background: #c43d43; }
.attendance-choice.late.selected { background: #fff2d9!important; color: #855100!important; border-color: #d99012; opacity: 1; }
.attendance-choice.late.selected .choice-dot { background: #d99012; }

#toast { position: fixed; right: 20px; bottom: 20px; background: var(--dark); color: #fff; padding: 11px 15px; border-radius: 9px; opacity: 0; pointer-events: none; transition: .2s; z-index: 3000; box-shadow: 0 4px 15px rgba(0,0,0,0.3); }
#toast.show { opacity: 1; }

.notice { background: #fff6e8; border-left: 4px solid var(--brand); color: #78350f; padding: 14px 18px; border-radius: 8px; margin-bottom: 16px; }
[data-theme="dark"] .notice { background: #451a03; color: #fde68a; }

/* Responsive Media Queries */
@media (max-width: 1024px) {
  main { padding: 16px 20px; }
  .span-3, .span-4 { grid-column: span 6; }
  .span-8 { grid-column: span 12; }
}
@media (max-width: 768px) {
  main { padding: 14px 14px; }
  header { flex-direction: column; align-items: stretch; gap: 10px; padding: 12px 16px; }
  .header-controls { flex-direction: row; justify-content: space-between; width: 100%; flex-wrap: wrap; }
  .search-box { width: 100%; }
  .section-title { flex-direction: column; align-items: flex-start; }
  .form-grid { grid-template-columns: 1fr; }
  .dashboard-grid > * { grid-column: span 12!important; }
  .attendance-row { grid-template-columns: 1fr 1fr 1fr; }
  .attendance-row b { grid-column: 1 / -1; }
}

/* Beautiful PDF Printable CSS */
@media print {
  body { background: #fff !important; color: #000 !important; font-family: 'Inter', system-ui, Arial, sans-serif; }
  header, nav, #app, #toast, .modal, .bulk-action-bar { display: none !important; }
  .print-only { display: block !important; }
  .print-sheet { padding: 25px 35px; max-width: 900px; margin: auto; }
  
  .print-header-brand {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 3px solid #15191e;
    padding-bottom: 16px;
    margin-bottom: 24px;
  }
  .print-brand-left h2 { margin: 0; font-size: 24px; font-weight: 800; color: #ef6c25; }
  .print-brand-left p { margin: 3px 0; font-size: 12px; color: #334155; line-height: 1.4; }
  .print-brand-right { text-align: right; }
  .print-brand-right h3 { margin: 0; font-size: 18px; font-weight: 700; color: #15191e; }
  .print-brand-right p { margin: 4px 0 0; font-size: 12px; color: #64748b; }

  .print-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; background: #f8fafc; padding: 14px 18px; border-radius: 8px; border: 1px solid #e2e8f0; }
  .print-grid p { margin: 4px 0; font-size: 13px; color: #1e293b; }

  .print-table { width: 100%; border-collapse: collapse; margin-bottom: 30px; }
  .print-table th, .print-table td { border: 1px solid #cbd5e1; padding: 10px 12px; text-align: left; font-size: 12px; }
  .print-table th { background: #f1f5f9 !important; color: #0f172a !important; font-weight: 700; text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px; }

  .print-signatures { display: flex; justify-content: space-between; margin-top: 60px; page-break-inside: avoid; }
  .signature-line { border-top: 2px solid #334155; width: 220px; text-align: center; padding-top: 6px; font-size: 12px; font-weight: bold; color: #334155; }
}