:root {
  --bg:            #060a12;
  --surface:       #0c1019;
  --surface2:      #111827;
  --surface3:      rgba(255,255,255,0.055);
  --border:        rgba(255,255,255,0.08);
  --border-bright: rgba(255,255,255,0.16);
  --accent:        #4f8cff;
  --accent-dark:   #3a6fd8;
  --accent-glow:   rgba(79,140,255,0.22);
  --green:         #22d87a;
  --green-dark:    #1aad5e;
  --green-glow:    rgba(34,216,122,0.2);
  --danger:        #ff5c5c;
  --danger-glow:   rgba(255,92,92,0.18);
  --warning:       #ffb547;
  --warning-glow:  rgba(255,181,71,0.18);
  --text:          #eef2ff;
  --text2:         #6272a4;
  --text3:         #2e3d5c;
  --radius-sm:     10px;
  --radius:        14px;
  --radius-lg:     20px;
  --radius-xl:     26px;
  --font:          'Plus Jakarta Sans', sans-serif;
  --mono:          'JetBrains Mono', monospace;
}


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


html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 90% 55% at 15% -5%,  rgba(79,140,255,0.13) 0%, transparent 65%),
    radial-gradient(ellipse 65% 45% at 85% 105%, rgba(34,216,122,0.09) 0%, transparent 60%);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}


::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }


header {
  height: 76px;
  padding: 0 52px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 200;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  background: rgba(6,10,18,0.78);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 0 28px var(--accent-glow), 0 0 0 2px rgba(79,140,255,0.45);
  flex-shrink: 0;
  overflow: hidden;
  padding: 0;
}
.logo-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}
.logo-text {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
  line-height: 1.1;
}
.logo-sub {
  font-size: 12px;
  color: var(--text2);
  font-weight: 500;
  margin-top: 2px;
}


.tab-bar-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}
.tab-bar {
  display: inline-flex;
  gap: 5px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 5px;
}
.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 30px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text2);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.1px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}


main {
  padding: 48px 52px;
  max-width: 1340px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}


.section { display: none; animation: fadeUp 0.32s ease both; }
.section.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}


.page-header { margin-bottom: 28px; }
.page-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
  background: linear-gradient(130deg, #fff 35%, #7090cc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.page-sub {
  color: var(--text2);
  font-size: 15px;
  font-weight: 500;
}


.form-card {
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 38px 38px 34px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.form-card:hover {
  border-color: rgba(79,140,255,0.18);
  box-shadow: 0 0 60px rgba(79,140,255,0.06);
}
.form-card-topline {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(79,140,255,0.7) 30%,
    rgba(34,216,122,0.5) 70%,
    transparent 100%);
}

.form-row {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.fg-serial { flex: 0 0 90px; }
.fg-name   { flex: 1 1 220px; }
.fg-month  { flex: 0 0 158px; }
.fg-year   { flex: 0 0 120px; }
.fg-fees   { flex: 0 0 148px; }
.fg-status { flex: 0 0 172px; }
.fg-submit { flex: 0 0 auto; }

label {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.9px;
}
.invisible-label { visibility: hidden; }

input {
  width: 100%;
  background: rgba(255,255,255,0.055);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 16px;
  outline: none;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  -moz-appearance: textfield;
  appearance: textfield;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input::placeholder { color: var(--text3); }
input:hover { border-color: var(--border-bright); }
input:focus {
  border-color: var(--accent);
  background: rgba(79,140,255,0.07);
  box-shadow: 0 0 0 3px rgba(79,140,255,0.13);
}

input.input-readonly {
  background: rgba(255,255,255,0.025);
  border-color: rgba(255,255,255,0.05);
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 16px;
  text-align: center;
  cursor: default;
  letter-spacing: 1px;
}
input.input-readonly:hover { border-color: rgba(79,140,255,0.2); }
input.input-readonly:focus { box-shadow: none; border-color: rgba(79,140,255,0.2); background: rgba(79,140,255,0.04); }

.input-prefix-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.input-prefix {
  position: absolute;
  left: 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text2);
  pointer-events: none;
  z-index: 1;
}
input.has-prefix { padding-left: 30px; }

.select-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}
.select-wrap select {
  width: 100%;
  background: rgba(255,255,255,0.055);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 40px 13px 16px;
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.select-wrap select:hover { border-color: var(--border-bright); }
.select-wrap select:focus {
  border-color: var(--accent);
  background: rgba(79,140,255,0.07);
  box-shadow: 0 0 0 3px rgba(79,140,255,0.13);
}
.select-wrap select option { background: var(--surface2); color: var(--text); }
.select-arrow {
  position: absolute;
  right: 13px;
  color: var(--text2);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.btn-add {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--green-dark), var(--green));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  padding: 13px 28px;
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: -0.2px;
  box-shadow: 0 4px 22px var(--green-glow), 0 0 0 1px rgba(34,216,122,0.18);
  transition: transform 0.18s, box-shadow 0.18s;
}
.btn-add:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(34,216,122,0.4), 0 0 0 1px rgba(34,216,122,0.3);
}
.btn-add:active { transform: translateY(0) scale(0.98); }


.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  opacity: 0;
  transform: translateY(16px) scale(0.95);
  transition: all 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 9999;
  border: 1px solid transparent;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0) scale(1); }
.toast.success {
  background: rgba(34,216,122,0.1);
  border-color: rgba(34,216,122,0.28);
  color: var(--green);
}
.toast.error {
  background: rgba(255,92,92,0.1);
  border-color: rgba(255,92,92,0.28);
  color: var(--danger);
}


.track-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1 1 280px;
  max-width: 480px;
}
.search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text2);
  pointer-events: none;
}
.search-wrap input { padding-left: 46px; width: 100%; }

.filter-wrap { flex: 0 0 148px; }

.suggestions {
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  background: var(--surface2);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  overflow: hidden;
  z-index: 100;
  display: none;
  box-shadow: 0 20px 50px rgba(0,0,0,0.55);
}
.suggestion-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.13s;
}
.suggestion-item:last-child { border-bottom: none; }
.suggestion-item::before {
  content: '';
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(79,140,255,0.15);
  border: 1px solid rgba(79,140,255,0.2);
  flex-shrink: 0;
}
.suggestion-item:hover { background: rgba(255,255,255,0.04); }

.btn-reset {
  display: flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 18px;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}
.btn-reset:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-glow);
}


.student-summary {
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 30px 34px;
  margin-bottom: 24px;
  display: none;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.student-summary.visible { display: block; animation: fadeUp 0.28s ease both; }
.summary-card-topline {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%, rgba(79,140,255,0.6) 35%,
    rgba(34,216,122,0.45) 70%, transparent 100%);
}
.summary-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.summary-avatar {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 0 22px var(--accent-glow);
  flex-shrink: 0;
}
.summary-name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
}
.summary-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-top: 3px;
}

.summary-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}
.stat-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.stat-card:hover { transform: translateY(-2px); }
.stat-card.s-total:hover { border-color: rgba(79,140,255,0.3); box-shadow: 0 6px 24px rgba(79,140,255,0.1); }
.stat-card.s-paid:hover  { border-color: rgba(34,216,122,0.3); box-shadow: 0 6px 24px rgba(34,216,122,0.1); }
.stat-card.s-pend:hover  { border-color: rgba(255,181,71,0.3); box-shadow: 0 6px 24px rgba(255,181,71,0.1); }
.stat-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text2);
  margin-bottom: 10px;
}
.stat-value {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.8px;
  line-height: 1;
}
.stat-card.s-total  .stat-value { color: var(--accent); }
.stat-card.s-paid   .stat-value { color: var(--green); }
.stat-card.s-pend   .stat-value { color: var(--warning); }
.stat-card.s-amt    .stat-value { font-size: 20px; font-family: var(--mono); }
.stat-card.s-paid.s-amt  .stat-value { color: var(--green); }
.stat-card.s-pend.s-amt  .stat-value { color: var(--warning); }
.stat-card.s-total.s-amt .stat-value { color: var(--accent); }


.table-wrap {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
table { width: 100%; border-collapse: collapse; font-size: 15px; }
thead {
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border);
}
th {
  padding: 16px 20px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  color: var(--text2);
}
.col-sr      { width: 72px; }
.col-actions { width: 120px; }
td {
  padding: 15px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.14s; }
tbody tr:hover { background: rgba(255,255,255,0.025); }

.cell-sno {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text3);
  font-weight: 500;
}

.name-cell { display: flex; align-items: center; gap: 12px; }
.row-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(79,140,255,0.14);
  border: 1px solid rgba(79,140,255,0.22);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800;
  color: var(--accent);
  flex-shrink: 0;
  letter-spacing: -0.5px;
}
.name-text { font-weight: 600; font-size: 15px; }

.month-pill {
  display: inline-block;
  padding: 5px 13px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px; font-weight: 600;
  color: var(--text2);
}

.year-text { font-family: var(--mono); font-size: 14px; font-weight: 500; color: var(--text2); }

.fees-text { font-family: var(--mono); font-size: 15px; font-weight: 600; color: var(--text); }

.badge-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: var(--font);
  transition: opacity 0.15s, transform 0.15s, box-shadow 0.2s;
}
.badge-toggle::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.badge-toggle:hover { opacity: 0.82; transform: scale(0.97); }
.badge-toggle:active { transform: scale(0.93); }
.badge-toggle:disabled { cursor: wait; }

.badge-toggle.paid {
  background: rgba(34,216,122,0.1);
  border-color: rgba(34,216,122,0.22);
  color: var(--green);
  box-shadow: 0 0 12px rgba(34,216,122,0.07);
}
.badge-toggle.paid::before { background: var(--green); box-shadow: 0 0 6px var(--green); }

.badge-toggle.pending {
  background: rgba(255,181,71,0.1);
  border-color: rgba(255,181,71,0.22);
  color: var(--warning);
}
.badge-toggle.pending::before { background: var(--warning); box-shadow: 0 0 6px var(--warning); }

.btn-row-delete {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid rgba(255,92,92,0.18);
  border-radius: var(--radius-sm);
  color: rgba(255,92,92,0.65);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}
.btn-row-delete:hover {
  background: var(--danger-glow);
  border-color: var(--danger);
  color: var(--danger);
  box-shadow: 0 0 16px rgba(255,92,92,0.15);
  transform: translateY(-1px);
}
.btn-row-delete:active { transform: translateY(0) scale(0.97); }

.empty-state { text-align: center; padding: 80px 20px; color: var(--text2); }
.empty-icon { font-size: 52px; margin-bottom: 16px; opacity: 0.55; }
.empty-state p { font-size: 16px; font-weight: 500; }


.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6,10,18,0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-box {
  background: var(--surface2);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  padding: 44px 44px 36px;
  max-width: 440px;
  width: 90%;
  text-align: center;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,92,92,0.12);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.28s cubic-bezier(0.34,1.56,0.64,1), opacity 0.25s;
  position: relative;
}
.modal-overlay.open .modal-box { transform: translateY(0) scale(1); }
.modal-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background: linear-gradient(90deg, transparent, rgba(255,92,92,0.7), transparent);
}
.modal-icon {
  font-size: 44px;
  margin-bottom: 18px;
  animation: shake 0.5s ease 0.1s both;
}
@keyframes shake {
  0%,100% { transform: rotate(0); }
  20%      { transform: rotate(-12deg); }
  40%      { transform: rotate(10deg); }
  60%      { transform: rotate(-8deg); }
  80%      { transform: rotate(6deg); }
}
.modal-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
  margin-bottom: 12px;
}
.modal-body {
  font-size: 15px;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 30px;
}
.modal-body strong { color: var(--text); }
.modal-body em     { color: var(--accent); font-style: normal; }

.modal-actions { display: flex; gap: 12px; justify-content: center; }
.btn-cancel {
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-bright);
  background: transparent;
  color: var(--text2);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
}
.btn-cancel:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.btn-confirm-delete {
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, #cc3333, var(--danger));
  color: #fff;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(255,92,92,0.35);
  transition: transform 0.18s, box-shadow 0.18s;
}
.btn-confirm-delete:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255,92,92,0.5); }
.btn-confirm-delete:active { transform: scale(0.97); }
.btn-confirm-delete:disabled { opacity: 0.65; cursor: wait; }


.header-clock {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
.clock-time {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 18px var(--accent-glow);
}
.clock-date {
  font-size: 11px;
  font-weight: 600;
  color: var(--text2);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}


.site-footer {
  text-align: center;
  padding: 28px 20px 32px;
  border-top: 1px solid var(--border);
  opacity: 0.5;
}
.footer-line {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text2);
  line-height: 1.8;
  letter-spacing: 0.2px;
}


@media (max-width: 860px) {
  header { padding: 0 22px; }
  main   { padding: 28px 22px; }
  .form-card { padding: 28px 22px; }
  .fg-serial, .fg-month, .fg-year, .fg-fees, .fg-status { flex: 1 1 130px; }
  .fg-name { flex: 1 1 100%; }
  .page-title { font-size: 26px; }
  .summary-stats { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
  .col-actions { width: 100px; }
  .btn-row-delete { padding: 6px 10px; font-size: 12px; }
}
@media (max-width: 520px) {
  .tab-btn { padding: 10px 16px; font-size: 13px; }
  .logo-text { font-size: 16px; }
  .modal-box { padding: 30px 22px 26px; }
}



@media (max-width: 768px) {
  header {
    height: 62px;
    padding: 0 16px;
  }
  .logo-icon { width: 38px; height: 38px; }
  .logo-text { font-size: 15px; }
  .logo-sub  { font-size: 10.5px; display: none; }   

  .clock-time { font-size: 16px; letter-spacing: 1px; }
  .clock-date { font-size: 10px; }

  main { padding: 20px 14px 36px; }

  .page-header { margin-bottom: 18px; }
  .page-title  { font-size: 22px; letter-spacing: -0.5px; }
  .page-sub    { font-size: 13px; }

  .tab-bar-wrap { margin-bottom: 16px; }
  .tab-btn {
    padding: 9px 18px;
    font-size: 13px;
    gap: 6px;
  }

  .form-card { padding: 20px 16px 18px; border-radius: var(--radius-lg); }

  .form-row    { gap: 12px; }
  .form-group  { width: 100%; }
  .fg-serial,
  .fg-name,
  .fg-month,
  .fg-year,
  .fg-fees,
  .fg-status,
  .fg-submit   { flex: 1 1 100% !important; }

  .fg-serial { flex: 1 1 80px  !important; }
  .fg-month  { flex: 1 1 150px !important; }
  .fg-year   { flex: 1 1 100px !important; }
  .fg-fees   { flex: 1 1 120px !important; }
  .fg-status { flex: 1 1 150px !important; }

  .fg-submit  { flex: 1 1 100% !important; }
  .btn-add    { width: 100%; justify-content: center; padding: 14px 20px; font-size: 15px; }

  .invisible-label { display: none; }

  .track-top   { flex-direction: column; align-items: stretch; gap: 10px; margin-bottom: 18px; }
  .search-wrap { max-width: 100%; flex: 1 1 auto; }
  .filter-wrap { flex: 1 1 auto !important; }
  .btn-reset   { width: 100%; justify-content: center; }

  .student-summary { padding: 20px 16px; border-radius: var(--radius-lg); }
  .summary-name    { font-size: 18px; }
  .summary-avatar  { width: 42px; height: 42px; font-size: 15px; }
  .summary-stats   { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-value      { font-size: 22px; }
  .stat-card.s-amt .stat-value { font-size: 17px; }

  .table-wrap {
    border-radius: var(--radius-lg);
    overflow: visible;        
    background: transparent;
    border: none;
    backdrop-filter: none;
  }
  table, thead, tbody, th, td, tr { display: block; }

  thead { display: none; }   

  tbody tr {
    background: rgba(255,255,255,0.035);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 10px;
    padding: 14px 16px;
    position: relative;
    transition: background 0.14s;
  }
  tbody tr:hover { background: rgba(255,255,255,0.06); }
  tbody tr:last-child td { border-bottom: 1px solid rgba(255,255,255,0.04); }

  tbody td {
    padding: 5px 0;
    border: none;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
  }

  tbody td::before {
    content: attr(data-label);
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text2);
    min-width: 80px;
    flex-shrink: 0;
  }

  tbody td.td-sr {
    position: absolute;
    top: 12px; right: 14px;
    padding: 0;
    font-size: 12px;
    color: var(--text3);
  }
  tbody td.td-sr::before { display: none; }

  tbody td.td-name { padding-top: 0; padding-bottom: 8px; }
  tbody td.td-name::before { display: none; }
  .name-cell  { gap: 10px; }
  .row-avatar { width: 32px; height: 32px; font-size: 11px; }
  .name-text  { font-size: 15px; }

  tbody td.td-actions {
    justify-content: flex-end;
    padding-top: 8px;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 4px;
  }
  tbody td.td-actions::before { display: none; }
  .btn-row-delete { padding: 7px 14px; font-size: 13px; }

  .month-pill { font-size: 12px; padding: 4px 10px; }

  .toast {
    bottom: 16px;
    left: 12px;
    right: 12px;
    text-align: center;
    font-size: 14px;
  }

  .modal-box { padding: 30px 20px 24px; border-radius: var(--radius-lg); }
  .modal-icon  { font-size: 36px; }
  .modal-title { font-size: 20px; }
  .modal-body  { font-size: 14px; margin-bottom: 22px; }
  .modal-actions { flex-direction: column; gap: 8px; }
  .btn-cancel, .btn-confirm-delete { width: 100%; padding: 13px 20px; }
}

@media (max-width: 380px) {
  .clock-time { font-size: 14px; }
  .clock-date { display: none; }
  .logo-text  { font-size: 13px; }
  .tab-btn    { padding: 8px 12px; font-size: 12px; }
  .page-title { font-size: 20px; }
}

.fees-nil {
  color: var(--text-muted, #4a5568);
  font-size: 1.1em;
  letter-spacing: 0.05em;
  opacity: 0.6;
}