/* ================================================================
   Student Attendance Management System
   Aesthetic: Warm Academic — refined, institutional, functional
   ================================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --clr-bg:             #f8f6f1;
  --clr-bg-muted:       #f0ece4;
  --clr-surface:        #fefefe;
  --clr-primary:        #1a7a72;
  --clr-primary-h:      #14665f;
  --clr-primary-l:      #e4f2f0;
  --clr-primary-xl:     #f0f8f7;
  --clr-accent:         #c07a1a;
  --clr-accent-l:       #fdf3e3;
  --clr-success:        #1a7a4a;
  --clr-success-l:      #e4f2eb;
  --clr-success-hover:  #d6efe2;
  --clr-danger:         #b42b2b;
  --clr-danger-h:       #8c2020;
  --clr-danger-l:       #fce8e8;
  --clr-danger-hover:   #f8d5d5;
  --clr-warning:        #c07a1a;
  --clr-warning-l:      #fdf3e3;
  --clr-text:           #2a2117;
  --clr-text-sec:       #6b6253;
  --clr-text-inv:       #faf8f4;
  --clr-placeholder:    #8a8070;
  --clr-border:         #e5dfd6;
  --clr-border-l:       #eee9e1;
  --clr-neutral-track:  #bfb6a8;

  --radius:      0.5rem;
  --radius-lg:   0.75rem;
  --shadow-sm:   0 1px 2px rgba(42,33,23,.04);
  --shadow:      0 1px 3px rgba(42,33,23,.06), 0 1px 2px rgba(42,33,23,.04);
  --shadow-md:   0 4px 12px rgba(42,33,23,.08);
  --shadow-lg:   0 8px 24px rgba(42,33,23,.1);

  /* Spacing scale — reach for these before hard-coding rem values */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Text scale — body + supporting sizes */
  --text-xs:   0.72rem;
  --text-sm:   0.82rem;
  --text-base: 0.92rem;
  --text-md:   1rem;
  --text-lg:   1.25rem;
  --text-xl:   1.5rem;

  /* Z-index scale */
  --z-sticky:  50;
  --z-overlay: 100;
  --z-toast:   200;

  /* Focus ring */
  --focus-ring: 0 0 0 3px var(--clr-primary-l);

  --font-body:    'DM Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', 'DM Sans', system-ui, sans-serif;
  --font-mono:    'Fira Code', 'Cascadia Code', 'Consolas', monospace;

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --transition:  180ms var(--ease-out);
}

@media (prefers-color-scheme: dark) {
  :root {
    --clr-bg:             #1a1612;
    --clr-bg-muted:       #241f19;
    --clr-surface:        #2a2520;
    --clr-primary:        #2ba093;
    --clr-primary-h:      #3cb8aa;
    --clr-primary-l:      #153432;
    --clr-primary-xl:     #112825;
    --clr-accent:         #d89744;
    --clr-accent-l:       #2d2418;
    --clr-success:        #4cb886;
    --clr-success-l:      #153828;
    --clr-success-hover:  #1e4a34;
    --clr-danger:         #e06565;
    --clr-danger-h:       #c84a4a;
    --clr-danger-l:       #3a1e1e;
    --clr-danger-hover:   #4d2828;
    --clr-warning:        #d89744;
    --clr-warning-l:      #2d2418;
    --clr-text:           #f0e8db;
    --clr-text-sec:       #a89d8b;
    --clr-text-inv:       #1a1612;
    --clr-placeholder:    #8a7f6e;
    --clr-border:         #3d3630;
    --clr-border-l:       #332d27;
    --clr-neutral-track:  #4a443c;
  }
}

/* Visually hidden — accessible to screen readers only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html {
  font-size: clamp(14px, 1.5vw, 15.5px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Utilities ────────────────────────────────────────────── */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 1.5rem);
}

code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  font-weight: 500;
  background: var(--clr-bg-muted);
  color: var(--clr-primary-h);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  letter-spacing: -0.01em;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.15rem;
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
}
.btn-danger:focus-visible,
.btn-danger-solid:focus-visible {
  outline-color: var(--clr-danger);
}

.btn-primary {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: var(--clr-text-inv);
}
.btn-primary:hover {
  background: var(--clr-primary-h);
  border-color: var(--clr-primary-h);
  box-shadow: 0 2px 8px rgba(26,122,114,.25);
}

.btn-secondary {
  background: var(--clr-surface);
  border-color: var(--clr-border);
  color: var(--clr-text);
}
.btn-secondary:hover {
  background: var(--clr-bg-muted);
  border-color: var(--clr-text-sec);
}

.btn-success {
  background: var(--clr-success-l);
  border-color: var(--clr-success);
  color: var(--clr-success);
}
.btn-success:hover {
  background: var(--clr-success);
  color: var(--clr-text-inv);
}

.btn-danger {
  background: var(--clr-danger-l);
  border-color: var(--clr-danger);
  color: var(--clr-danger);
}
.btn-danger:hover {
  background: var(--clr-danger);
  color: var(--clr-text-inv);
}

.btn-danger-solid {
  background: var(--clr-danger);
  border-color: var(--clr-danger);
  color: var(--clr-text-inv);
}
.btn-danger-solid:hover {
  background: var(--clr-danger-h);
  border-color: var(--clr-danger-h);
}

.btn-outline {
  background: transparent;
  border-color: var(--clr-border);
  color: var(--clr-text-sec);
}
.btn-outline:hover {
  background: var(--clr-bg-muted);
  border-color: var(--clr-text-sec);
  color: var(--clr-text);
}

.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ── Form elements ────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.form-group label {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-text-sec);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group select {
  padding: 0.6rem 0.8rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius);
  background: var(--clr-surface);
  color: var(--clr-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%237a7062' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}

@media (prefers-color-scheme: dark) {
  .form-group select {
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23a89d8b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  }
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--clr-primary);
  box-shadow: var(--focus-ring);
}

.form-group input::placeholder {
  color: var(--clr-placeholder);
  opacity: 1;
}

.form-group select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ── Alerts ───────────────────────────────────────────────── */
.alert {
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.84rem;
  font-weight: 500;
  margin-bottom: 1rem;
  border-left: 3px solid;
}

.alert-error {
  background: var(--clr-danger-l);
  color: var(--clr-danger);
  border-left-color: var(--clr-danger);
}

/* ================================================================
   LOGIN PAGE — Two-panel split
   ================================================================ */
.login-page {
  min-height: 100vh;
  background: var(--clr-bg);
}

.login-split {
  display: grid;
  grid-template-columns: 42% 1fr;
  min-height: calc(100vh - 3rem); /* leave room for footer */
}

/* Left decorative panel */
.login-panel {
  background: var(--clr-primary-h);
  color: var(--clr-text-inv);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
}

.login-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 28px 28px;
}

.login-panel::after {
  content: '';
  position: absolute;
  bottom: -120px;
  right: -120px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
}

.login-panel-content {
  position: relative;
  z-index: 1;
  max-width: 320px;
}

.login-logo {
  display: block;
  max-width: 100%;
  height: auto;
  margin-bottom: 1.75rem;
  /* Soft shadow helps the logo sit cleanly on the teal panel */
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.15));
}

.login-panel-content h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.login-panel-content p {
  font-size: 0.95rem;
  opacity: 0.75;
  line-height: 1.5;
}

/* ── Login footer (project credit) ───────────────────────── */
.login-footer {
  padding: 1rem clamp(1rem, 3vw, 2rem);
  text-align: center;
  font-size: 0.78rem;
  color: var(--clr-text-sec);
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border-l);
}
.login-footer p {
  margin: 0;
  line-height: 1.5;
}
.login-footer strong {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--clr-text);
  letter-spacing: -0.01em;
}
.login-footer-sep {
  margin: 0 0.5rem;
  opacity: 0.5;
}

/* Right form side */
.login-form-side {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4rem);
}

.login-form-wrapper {
  width: 100%;
  max-width: 360px;
}

.login-form-wrapper h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.login-form-wrapper > p {
  font-size: 0.88rem;
  color: var(--clr-text-sec);
  margin-bottom: 1.75rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.login-form .form-group input {
  padding: 0.7rem 0.9rem;
  font-size: 0.95rem;
}

.login-form .btn-primary {
  margin-top: 0.35rem;
  padding: 0.7rem;
  font-size: 0.95rem;
}

.login-hint {
  font-size: 0.76rem;
  color: var(--clr-text-sec);
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--clr-border-l);
}

/* ================================================================
   TOP BAR
   ================================================================ */
.topbar {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.topbar-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0.6rem clamp(1rem, 3vw, 1.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--clr-primary);
  letter-spacing: -0.01em;
}

/* Show only the circular seal portion of the wide logo in the topbar */
.topbar-logo {
  width: 28px;
  height: 28px;
  object-fit: cover;
  object-position: left center;
  border-radius: 50%;
  flex-shrink: 0;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.topbar-user {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--clr-text-sec);
}

.topbar-user svg {
  color: var(--clr-primary);
}

/* ================================================================
   DASHBOARD — Controls
   ================================================================ */
.main-content {
  padding: clamp(1.25rem, 3vw, 2rem) 0 3rem;
}

/* ── Card base — .controls-card, .table-card, .placeholder-card compose on this */
.card,
.controls-card,
.table-card,
.placeholder-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-l);
  border-radius: var(--radius-lg);
}

.controls-card {
  padding: clamp(1rem, 2.5vw, 1.5rem);
  margin-bottom: 1.25rem;
}

.controls-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  color: var(--clr-text);
}

.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr 0.8fr;
  gap: 1rem;
  align-items: end;
}

/* ================================================================
   DASHBOARD — Table section
   ================================================================ */
.table-card {
  overflow: hidden;
}

.table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem clamp(1rem, 2.5vw, 1.5rem);
  border-bottom: 1px solid var(--clr-border-l);
}

.table-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--clr-text);
}

.table-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.bulk-actions {
  display: flex;
  gap: 0.3rem;
}

/* Stats row */
.stats-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.6rem clamp(1rem, 2.5vw, 1.5rem);
  border-bottom: 1px solid var(--clr-border-l);
  background: var(--clr-bg);
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.stat-badge span {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
  display: inline-block;
  transform-origin: center;
}

.stat-badge span.pulse {
  animation: stat-pulse 380ms var(--ease-out);
}

@keyframes stat-pulse {
  0%   { transform: scale(1); }
  35%  { transform: scale(1.18); }
  100% { transform: scale(1); }
}

.stat-total    { background: var(--clr-bg-muted); color: var(--clr-text-sec); }
.stat-present  { background: var(--clr-success-l); color: var(--clr-success); }
.stat-absent   { background: var(--clr-danger-l);  color: var(--clr-danger); }
.stat-unmarked { background: var(--clr-accent-l);  color: var(--clr-accent); }

/* Table */
.table-responsive {
  overflow-x: auto;
}

.attendance-table {
  width: 100%;
  border-collapse: collapse;
}

.attendance-table th,
.attendance-table td {
  padding: 0.65rem clamp(1rem, 2.5vw, 1.5rem);
  text-align: left;
  font-size: 0.88rem;
}

.attendance-table thead th {
  background: var(--clr-bg);
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clr-text-sec);
  border-bottom: 1px solid var(--clr-border);
}

.attendance-table tbody tr {
  border-bottom: 1px solid var(--clr-border-l);
  border-left: 3px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}

.attendance-table tbody tr:last-child {
  border-bottom: none;
}

.attendance-table tbody tr:hover {
  background: var(--clr-primary-xl);
}

/* Status rows — left border indicator instead of full-row tint */
.attendance-table tbody tr.row-present {
  border-left-color: var(--clr-success);
  background: var(--clr-success-l);
}
.attendance-table tbody tr.row-present:hover {
  background: var(--clr-success-hover);
}

.attendance-table tbody tr.row-absent {
  border-left-color: var(--clr-danger);
  background: var(--clr-danger-l);
}
.attendance-table tbody tr.row-absent:hover {
  background: var(--clr-danger-hover);
}

.th-sno    { width: 3rem;  }
.th-roll   { width: 14rem; }
.th-status { width: 10rem; }

.td-sno {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--clr-text-sec);
}

.td-name {
  font-weight: 500;
}

/* Row entrance animation */
.attendance-table tbody tr {
  opacity: 0;
  transform: translateY(6px);
  animation: row-in 350ms var(--ease-out) forwards;
}

@keyframes row-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Toggle switch ────────────────────────────────────────── */
.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  user-select: none;
  min-height: 44px;
  padding: 0.25rem 0;
}

.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: relative;
  width: 42px;
  height: 24px;
  background: var(--clr-neutral-track);
  border-radius: 999px;
  transition: background 200ms var(--ease-out);
  flex-shrink: 0;
}

.toggle-slider::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--clr-text-inv);
  border-radius: 50%;
  transition: transform 250ms var(--ease-out);
  box-shadow: 0 1px 3px rgba(42,33,23,.2);
}

/* Unmarked rows: neutral track. Marked rows: status colors */
.row-present .toggle-slider,
.toggle-switch input:checked + .toggle-slider {
  background: var(--clr-success);
}
.row-absent .toggle-slider {
  background: var(--clr-danger);
}

.toggle-switch input:checked + .toggle-slider::after {
  transform: translateX(18px);
}

.toggle-switch input:focus-visible + .toggle-slider {
  box-shadow: 0 0 0 2px var(--clr-surface), 0 0 0 4px var(--clr-primary);
}

.toggle-label {
  font-size: 0.78rem;
  font-weight: 600;
  min-width: 5.5rem;
  color: var(--clr-text-sec);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* Non-color status glyph — works for colorblind users and B/W print */
.toggle-label::before {
  content: '○';
  font-family: var(--font-heading);
  font-size: 0.9rem;
  line-height: 1;
  color: var(--clr-text-sec);
}
.row-present .toggle-label {
  color: var(--clr-success);
}
.row-present .toggle-label::before {
  content: '✓';
  color: var(--clr-success);
}
.row-absent .toggle-label {
  color: var(--clr-danger);
}
.row-absent .toggle-label::before {
  content: '✕';
  color: var(--clr-danger);
}

/* ── Empty / placeholder states ──────────────────────────── */
.empty-state,
.placeholder-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: clamp(2rem, 5vw, 3.5rem) 1.5rem;
  color: var(--clr-text-sec);
  gap: 0.6rem;
}

.empty-state svg,
.placeholder-card svg {
  color: var(--clr-border);
}

.placeholder-card {
  border-style: dashed;
  border-width: 1.5px;
  border-color: var(--clr-border);
  min-height: 260px;
}

.placeholder-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.01em;
  margin-top: 0.25rem;
}

.placeholder-card p {
  font-size: 0.85rem;
  max-width: 320px;
  line-height: 1.5;
}

.empty-state {
  animation: fade-rise 280ms var(--ease-out) both;
}

.empty-state h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.01em;
  margin-top: 0.25rem;
}

.empty-state p {
  font-size: 0.85rem;
  max-width: 340px;
  line-height: 1.5;
}

/* ── First-run tip ──────────────────────────────────────── */
.first-run-tip {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  background: var(--clr-primary-xl);
  border: 1px solid var(--clr-primary-l);
  border-radius: var(--radius);
  max-width: 420px;
  text-align: left;
  color: var(--clr-text);
  animation: fade-rise 320ms var(--ease-out) both;
  animation-delay: 120ms;
}

@keyframes fade-rise {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.first-run-tip-title {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-primary-h);
  letter-spacing: -0.005em;
  margin-bottom: 0.55rem;
  max-width: none;
}

.first-run-tip-steps {
  list-style: decimal;
  padding-left: 1.15rem;
  margin-bottom: 0.85rem;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--clr-text);
}

.first-run-tip-steps li + li {
  margin-top: 0.25rem;
}

.first-run-tip button {
  margin-top: 0.1rem;
}

/* ── Toast notification ──────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--clr-text-inv);
  opacity: 0;
  transition: opacity 250ms var(--ease-out), transform 250ms var(--ease-out);
  pointer-events: none;
  z-index: var(--z-toast);
  box-shadow: var(--shadow-lg);
  max-width: calc(100vw - 2rem);
}

.toast-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.toast-success { background: var(--clr-success); }
.toast-error   { background: var(--clr-danger);  }
.toast-warning { background: var(--clr-accent);  }

.toast-action {
  display: inline-flex;
  align-items: center;
  margin-left: 0.85rem;
  padding: 0.2rem 0.55rem;
  background: rgba(255,255,255,.18);
  color: inherit;
  font: inherit;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 4px;
  cursor: pointer;
}
.toast-action:hover {
  background: rgba(255,255,255,.28);
}

/* ── Loading skeleton rows ───────────────────────────────── */
.skeleton-row td {
  padding: 0.9rem clamp(1rem, 2.5vw, 1.5rem);
}
.skeleton-bar {
  display: block;
  height: 0.85rem;
  background: linear-gradient(90deg,
    var(--clr-bg-muted) 0%,
    var(--clr-border-l) 50%,
    var(--clr-bg-muted) 100%);
  background-size: 200% 100%;
  border-radius: 4px;
  animation: skeleton-shimmer 1.4s linear infinite;
}
.skeleton-bar.w-sm { width: 2.2rem; }
.skeleton-bar.w-md { width: 6rem; }
.skeleton-bar.w-lg { width: 10rem; }
.skeleton-bar.w-pill {
  width: 4rem;
  height: 1.4rem;
  border-radius: 999px;
}
@keyframes skeleton-shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ── Confirm banner (bulk actions) ───────────────────────── */
.confirm-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.75rem clamp(1rem, 2.5vw, 1.5rem);
  background: var(--clr-warning-l);
  border-bottom: 1px solid var(--clr-border-l);
  border-left: 3px solid var(--clr-accent);
  color: var(--clr-text);
  font-size: 0.88rem;
  animation: banner-slide-in 260ms var(--ease-out) both;
  transform-origin: top center;
}

@keyframes banner-slide-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.confirm-banner-text strong {
  font-family: var(--font-heading);
  font-weight: 700;
}
.confirm-banner-actions {
  display: flex;
  gap: 0.4rem;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
  /* Login — stack panels */
  .login-split {
    grid-template-columns: 1fr;
  }

  .login-panel {
    padding: 2rem 1.5rem;
    min-height: auto;
  }

  .login-panel-content {
    max-width: none;
    text-align: center;
  }

  .login-panel-content h1 {
    font-size: 1.35rem;
  }

  .login-panel-content p {
    font-size: 0.88rem;
    max-width: 32ch;
    margin-left: auto;
    margin-right: auto;
  }

  .login-logo {
    max-width: 240px;
    margin-bottom: 0.9rem;
  }

  .login-footer {
    font-size: 0.74rem;
    padding: 0.85rem 1rem;
  }
  .login-footer-sep {
    display: none;
  }
  .login-footer p > span:last-of-type {
    display: block;
    margin-top: 0.15rem;
  }

  .login-form-side {
    padding: 2rem 1.25rem;
  }

  /* Dashboard */
  .controls-grid {
    grid-template-columns: 1fr;
  }

  .table-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
  }

  .table-actions {
    justify-content: space-between;
  }

  .attendance-table th,
  .attendance-table td {
    padding: 0.55rem 0.75rem;
    font-size: 0.82rem;
  }

  .th-roll   { width: auto; }
  .th-status { width: auto; }

  .stats-row {
    flex-wrap: wrap;
    gap: 0.35rem;
    padding: 0.5rem 0.75rem;
  }

  .bulk-actions {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .login-form-wrapper h2 {
    font-size: 1.25rem;
  }

  .topbar-brand {
    font-size: 0.85rem;
    gap: 0.4rem;
  }
  .topbar-logo {
    width: 24px;
    height: 24px;
  }

  .td-roll code {
    font-size: 0.72em;
  }

  /* Keep status readable on phones — shrink instead of hiding */
  .toggle-label {
    font-size: 0.7rem;
    min-width: 0;
  }
  .toggle-label-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }
}

/* Touch-target floor on phones */
@media (max-width: 768px) {
  .btn-sm {
    min-height: 40px;
    padding: 0.5rem 0.85rem;
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}