:root {
  color-scheme: light;
  --bg: #eee8ff;
  --surface: #ffffff;
  --surface-soft: #eef2f8;
  --text: #182235;
  --muted: #647089;
  --border: #d9e0eb;
  --primary: #5a3fd6;
  --primary-strong: #452bb8;
  --primary-soft: #eeeafe;
  --success: #23825c;
  --warning: #a05a00;
  --danger: #c33d4c;
  --shadow: 0 14px 35px rgb(34 43 69 / 10%);
  --radius: 18px;
  --music-glow: rgb(90 63 214 / 12%);
  --music-staff: rgb(90 63 214 / 11%);
  --music-note: rgb(90 63 214 / 10%);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #2b234b;
  --surface: #1b2130;
  --surface-soft: #252c3d;
  --text: #f4f6fb;
  --muted: #abb4c7;
  --border: #343d52;
  --primary: #a996ff;
  --primary-strong: #c5b9ff;
  --primary-soft: #302a50;
  --success: #68d3a7;
  --warning: #ffc16a;
  --danger: #ff8792;
  --shadow: 0 18px 45px rgb(0 0 0 / 28%);
  --music-glow: rgb(169 150 255 / 10%);
  --music-staff: rgb(169 150 255 / 12%);
  --music-note: rgb(197 185 255 / 11%);
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  overflow-x: clip;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  isolation: isolate;
  background:
    radial-gradient(circle at 8% 6%, var(--music-glow), transparent 28rem),
    radial-gradient(circle at 92% 88%, var(--music-glow), transparent 32rem),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: "Nunito", system-ui, sans-serif;
  line-height: 1.5;
}

/* Quiet musical details sit behind the portal without competing with the lesson content. */
body::before,
body::after {
  position: fixed;
  z-index: -1;
  pointer-events: none;
  user-select: none;
}

body::before {
  content: "";
  top: clamp(76px, 10vw, 132px);
  right: -48px;
  width: min(48vw, 540px);
  height: 118px;
  background:
    linear-gradient(var(--music-staff) 0 0) 0 15px / 100% 1px no-repeat,
    linear-gradient(var(--music-staff) 0 0) 0 31px / 100% 1px no-repeat,
    linear-gradient(var(--music-staff) 0 0) 0 47px / 100% 1px no-repeat,
    linear-gradient(var(--music-staff) 0 0) 0 63px / 100% 1px no-repeat,
    linear-gradient(var(--music-staff) 0 0) 0 79px / 100% 1px no-repeat;
  mask-image: linear-gradient(to right, transparent, #000 32%);
  transform: rotate(-5deg);
}

body::after {
  content: "\266A\00A0\00A0\00A0\266B";
  top: clamp(82px, 10vw, 136px);
  right: clamp(18px, 5vw, 72px);
  color: var(--music-note);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(4.5rem, 10vw, 8.5rem);
  line-height: 1;
  letter-spacing: .08em;
  transform: rotate(-5deg);
}

button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: var(--primary); }
button:disabled, input:disabled, select:disabled, textarea:disabled { cursor: not-allowed; opacity: .62; }
:where(a, button, input, select, textarea, summary):focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 42%, transparent);
  outline-offset: 2px;
}

[hidden] { display: none !important; }

.page-shell {
  width: min(1160px, 100%);
  margin: 0 auto;
  padding: 28px max(16px, env(safe-area-inset-right)) calc(42px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}
.site-header > :first-child { min-width: 0; }
.site-header h1 { overflow-wrap: anywhere; }

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.15; }
h2 { margin-bottom: 18px; font-size: clamp(1.35rem, 3vw, 1.75rem); }

.eyebrow {
  margin-bottom: 5px;
  color: var(--primary);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.header-actions, .section-heading, .button-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.header-actions { flex: 0 0 auto; justify-content: flex-end; }

.button, .icon-button, button.button {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 15px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button:hover, .button:focus-visible { background: var(--primary-strong); }

.button-secondary, .icon-button {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.button-secondary:hover, .button-secondary:focus-visible,
.icon-button:hover, .icon-button:focus-visible { background: var(--surface-soft); }

.icon-button {
  width: 44px;
  padding: 8px;
  font-size: 1.15rem;
}

.content-stack { display: grid; min-width: 0; gap: 20px; }

.portal-tabs {
  position: sticky;
  top: 8px;
  z-index: 20;
  display: flex;
  gap: 4px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 5px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.portal-tab {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  padding: 9px 14px;
  background: none;
  color: var(--muted);
  font-weight: 800;
  white-space: nowrap;
  cursor: pointer;
}

.portal-tab.is-active { background: var(--primary); color: #fff; }
.portal-tab:not(.is-active):hover,
.portal-tab:not(.is-active):focus-visible { background: var(--surface-soft); color: var(--text); }

.student-context {
  display: flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  margin: -8px 0 22px;
  border: 1px solid color-mix(in srgb, var(--primary) 32%, var(--border));
  border-radius: 12px;
  padding: 9px 12px;
  background: var(--primary-soft);
}
.student-context select { width: auto; min-width: 180px; background: var(--surface); }

.card {
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 30px);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.card :where(h2, h3, h4, p, li, a, strong, span) { overflow-wrap: anywhere; }

.card[data-tab-panel] { padding-top: clamp(16px, 3vw, 22px); }

.status-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 16px;
}

.status-strip-cell {
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.status-strip-cell:hover,
.status-strip-cell:focus-visible { border-color: var(--primary); background: var(--surface-soft); }
.status-strip-value { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 5px; font-weight: 800; }
.status-strip-progress { display: grid; width: 100%; }
.status-strip-progress .progress-track { display: block; width: 100%; }

.people-section + .people-section { margin-top: 26px; border-top: 1px solid var(--border); padding-top: 22px; }

.header-menu { position: relative; }
.header-menu summary { list-style: none; }
.header-menu summary::-webkit-details-marker { display: none; }
.header-menu-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 30;
  display: grid;
  gap: 2px;
  min-width: 220px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.header-menu-panel a { display: block; border-radius: 8px; padding: 10px 12px; color: var(--text); font-weight: 700; text-decoration: none; }
.header-menu-panel a:hover,
.header-menu-panel a:focus-visible { background: var(--surface-soft); }

.instructor-review-card { border-color: color-mix(in srgb, var(--primary) 38%, var(--border)); }
.instructor-review-link { box-shadow: 0 5px 14px color-mix(in srgb, var(--primary) 25%, transparent); }
.section-intro { margin: -10px 0 22px; color: var(--muted); }

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 14px;
  padding: 28px 18px;
  color: var(--muted);
  text-align: center;
}

.portal-form, .student-list, .attachment-list, .target-list { display: grid; gap: 14px; }

.form-field { display: grid; gap: 7px; color: var(--text); font-weight: 700; }
.form-field-small { max-width: 280px; }
fieldset.form-field { margin: 0; border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
fieldset.form-field legend { padding: 0 6px; }

input, textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--surface);
  color: var(--text);
}

input:focus, textarea:focus, select:focus { outline: 3px solid var(--primary-soft); border-color: var(--primary); }
textarea { resize: vertical; }

.checkbox-label { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; }
.checkbox-label input { width: 20px; height: 20px; margin: 0; accent-color: var(--primary); }
.target-list { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); padding: 8px 0 0 28px; }

.student-row {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-soft);
}
.student-row.is-inactive { opacity: .62; }
.student-row-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto auto auto; align-items: center; gap: 14px; padding: 13px 16px; cursor: pointer; list-style: none; }
.student-row-summary::-webkit-details-marker { display: none; }
.student-row-summary::after { content: "›"; color: var(--primary); font-size: 1.45rem; font-weight: 800; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.student-row[open] > .student-row-summary::after { transform: rotate(-90deg); }
.student-row-summary:hover, .student-row-summary:focus-visible { background: color-mix(in srgb, var(--primary-soft) 55%, transparent); }
.student-summary-instrument, .student-summary-status { color: var(--muted); font-size: .85rem; font-weight: 800; }
.student-summary-status { border-radius: 999px; padding: 3px 9px; background: color-mix(in srgb, var(--success) 13%, var(--surface)); color: var(--success); }
.student-summary-status.is-inactive { background: var(--surface); color: var(--muted); }
.student-row-content { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(110px, .55fr) minmax(220px, 1fr); gap: 16px; align-items: center; border-top: 1px solid var(--border); padding: 16px; }
.roster-create-panel { overflow: hidden; margin-bottom: 18px; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-soft); }
.roster-create-panel .section-intro { margin: 0 0 14px; color: var(--muted); }
.roster-create-form { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
.roster-create-form .account-form-grid { grid-column: 1 / -1; }
.roster-create-form .form-error { align-self: center; }
.student-identity, .student-field { display: grid; gap: 4px; min-width: 0; }
.student-identity span { overflow: hidden; color: var(--muted); font-size: .88rem; text-overflow: ellipsis; }
.field-label { color: var(--muted); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
.inline-field, .pin-controls { display: flex; min-width: 0; align-items: center; gap: 8px; }
.inline-field > input, .inline-field > select { min-width: 0; }
.button-small { min-height: 38px; padding: 7px 11px; font-size: .85rem; }
.pin-value { min-width: 4.5em; font-size: 1rem; }

.attachment-row { display: grid; grid-template-columns: 150px minmax(180px, 1.5fr) minmax(160px, 1fr) 44px; gap: 8px; align-items: center; }
.danger-button { color: var(--danger); }
.week-preview { display: grid; gap: 3px; max-width: 680px; border-left: 4px solid var(--primary); border-radius: 10px; padding: 12px 14px; background: var(--primary-soft); }
.week-preview span:last-child { color: var(--muted); font-size: .9rem; font-weight: 700; }

.homework-section, .homework-list, .homework-attachments { display: grid; gap: 14px; }
.homework-section + .finished-homework { margin-top: 24px; }
.homework-card { border: 1px solid var(--border); border-radius: 14px; padding: 18px; background: var(--surface-soft); }
.homework-card.is-overdue { border-color: var(--danger); box-shadow: inset 4px 0 var(--danger); }
.homework-card-heading { display: flex; justify-content: space-between; gap: 14px; align-items: flex-start; }
.homework-card-heading h3 { margin-bottom: 6px; }
.due-date { margin-bottom: 12px; color: var(--muted); font-size: .9rem; font-weight: 700; }
.overdue-text { color: var(--danger); }
.preserve-lines { white-space: pre-wrap; }
.status-badge { display: inline-flex; flex: 0 0 auto; border-radius: 999px; padding: 5px 10px; background: var(--surface); color: var(--muted); font-size: .78rem; font-weight: 800; }
.status-done { background: #dcecff; color: #174e8b; }
.status-signed { background: #fff0cf; color: #7b4a00; }
.status-complete { background: #d8f4e7; color: #166343; }
.status-incomplete { background: #ffe0e3; color: #992936; }
.status-todo { background: #eeeafe; color: #452bb8; }
:root[data-theme="dark"] .status-done { background: #243f63; color: #a7d0ff; }
:root[data-theme="dark"] .status-signed { background: #4f3c20; color: #ffd998; }
:root[data-theme="dark"] .status-complete { background: #1d4938; color: #9ae5c4; }
:root[data-theme="dark"] .status-incomplete { background: #582c34; color: #ffb5bc; }
:root[data-theme="dark"] .status-todo { background: #332c5b; color: #c5b9ff; }
.homework-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 16px; }
.homework-actions p { margin: 0; }
.status-message { flex-basis: 100%; color: var(--muted); }
.notice { width: 100%; border-radius: 10px; padding: 11px 13px; }
.notice-warning { background: color-mix(in srgb, var(--warning) 13%, transparent); color: var(--warning); }
.notice-success { background: color-mix(in srgb, var(--success) 13%, transparent); color: var(--success); }
.notice-danger { background: color-mix(in srgb, var(--danger) 13%, transparent); color: var(--danger); }
.penalty-due-notice {
  display: grid;
  gap: 4px;
  margin-bottom: 18px;
  border: 1px solid color-mix(in srgb, var(--danger) 55%, var(--border));
  border-radius: 13px;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--danger) 12%, var(--surface));
  color: var(--text);
}
.penalty-due-notice strong { color: var(--danger); }
.attachment-link { width: fit-content; font-weight: 700; }
.video-attachment iframe { width: min(100%, 640px); aspect-ratio: 16 / 9; border: 0; border-radius: 12px; }
.finished-homework summary { margin-bottom: 14px; color: var(--primary); font-weight: 800; cursor: pointer; }

.shared-homework-week { display: grid; gap: 18px; }
.family-panel { overflow: hidden; }
.audience-heading { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 20px; }
.audience-heading h2 { margin-bottom: 4px; }
.audience-heading p { margin-bottom: 0; color: var(--muted); }
.audience-heading-icon {
  display: grid;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 14px;
  background: var(--primary-soft);
  font-size: 1.45rem;
}
.parent-family-panel { border-color: color-mix(in srgb, var(--primary) 32%, var(--border)); }
.homework-week-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--border));
  border-radius: 16px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--primary-soft), var(--surface));
  text-align: left;
}
.homework-week-banner.is-overdue { border-color: var(--danger); }
.homework-week-banner h3 { margin: 0; font-size: 1.1rem; text-transform: capitalize; }
.due-chip { border-radius: 999px; padding: 6px 12px; background: var(--surface); color: var(--primary); font-size: .85rem; font-weight: 800; white-space: nowrap; }
.homework-week-banner.is-overdue .due-chip { color: var(--danger); }
.homework-due-callout { margin: 0; color: var(--primary); font-size: 1.05rem; font-weight: 800; }
.homework-week-banner.is-overdue .homework-due-callout { color: var(--danger); }
.shared-homework-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.audience-panel { min-width: 0; border: 1px solid var(--border); border-radius: 16px; padding: clamp(18px, 3vw, 24px); background: var(--surface-soft); }
.student-homework-panel { box-shadow: inset 0 4px #4386d8; }
.parent-homework-panel { box-shadow: inset 0 4px var(--primary); }
.audience-panel > h3 { margin-bottom: 6px; font-size: 1.35rem; }
.audience-icon { margin-bottom: 5px; font-size: 1.55rem; }
.audience-intro { color: var(--muted); }
.weekly-assignment-list, .parent-signoff-list { display: grid; gap: 14px; }
.weekly-assignment, .parent-signoff-item { border: 1px solid var(--border); border-radius: 13px; background: var(--surface); }
.weekly-assignment { padding: 16px; }
.weekly-assignment.is-overdue { border-color: var(--danger); }
.weekly-assignment h4, .parent-signoff-item h4 { margin: 0 0 8px; font-size: 1.05rem; }
.parent-signoff-item { overflow: hidden; }
.parent-homework-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px;
}
.parent-homework-details > .parent-homework-summary {
  grid-template-columns: minmax(0, 1fr) auto auto;
  cursor: pointer;
  list-style: none;
}
.parent-homework-summary::-webkit-details-marker { display: none; }
.parent-homework-details > .parent-homework-summary::after {
  content: "›";
  color: var(--muted);
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  transform: rotate(90deg);
  transition: transform .18s ease;
}
.parent-homework-static .parent-homework-summary { cursor: default; }
.parent-homework-details[open] > .parent-homework-summary {
  border-bottom: 1px solid var(--border);
  background: var(--surface-soft);
}
.parent-homework-details[open] > .parent-homework-summary::after { transform: rotate(-90deg); }
.parent-homework-summary-copy { display: flex; align-items: baseline; gap: 7px; min-width: 0; }
.parent-homework-summary-copy strong { overflow-wrap: anywhere; }
.homework-entry-due { flex: 0 0 auto; color: var(--primary); font-size: .88rem; font-weight: 800; }
.homework-entry-separator { color: var(--muted); }
.parent-homework-content { padding: 16px; }
.default-homework-label { width: fit-content; margin-bottom: 12px; border-radius: 999px; padding: 4px 9px; background: var(--primary-soft); color: var(--primary); font-size: .75rem; font-weight: 800; }
.student-line-item { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 14px 0; border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
.student-line-item-label { font-weight: 800; }
.parent-step-message, .confirmation-copy, .field-help { color: var(--muted); }
.parent-step-message { margin-bottom: 0; }
.parent-signoff-form { margin-top: 0; }
.simple-parent-form { max-width: 560px; }
.simple-parent-form input { min-height: 52px; font-size: 1.05rem; }
.simple-parent-form .form-error:empty { display: none; }
.parent-submit { min-width: 150px; }
.field-help { font-size: .8rem; font-weight: 600; }
.signature-picker { margin: 0; border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.signature-picker legend { padding: 0 6px; font-weight: 800; }
.signature-mode-row { display: flex; gap: 8px; margin-bottom: 10px; }
.signature-mode {
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  background: var(--surface-soft);
  color: var(--text);
  font-weight: 800;
  cursor: pointer;
}
.signature-mode.is-active { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.signature-options { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; margin-top: 12px; }
.signature-option { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 8px; min-width: 0; border: 1px solid var(--border); border-radius: 11px; padding: 11px; background: var(--surface); cursor: pointer; }
.signature-option:has(input:checked) { border-color: var(--primary); outline: 2px solid var(--primary-soft); }
.signature-option input { width: 18px; height: 18px; margin: 0; accent-color: var(--primary); }
.signature-script { display: inline-block; overflow-wrap: anywhere; color: var(--text); font-size: clamp(1.35rem, 3vw, 1.8rem); line-height: 1.25; }
.signature-style-1 { font-family: "Snell Roundhand", "Segoe Script", "Brush Script MT", cursive; }
.signature-style-2 { font-family: "Apple Chancery", "Lucida Calligraphy", "URW Chancery L", cursive; font-style: italic; }
.signature-style-3 { font-family: Georgia, "Times New Roman", serif; font-style: italic; font-weight: 700; letter-spacing: .025em; }
.signature-draw-panel { margin-top: 12px; }
.signature-canvas { display: block; width: 100%; height: 150px; margin: 8px 0; border: 1px solid var(--border); border-radius: 10px; background: #fff; touch-action: none; cursor: crosshair; }
.saved-signature { display: grid; gap: 5px; width: 100%; margin-top: 12px; border-top: 1px solid var(--border); padding-top: 10px; }
.saved-signature-image { display: block; width: min(100%, 320px); max-height: 110px; object-fit: contain; object-position: left center; border-radius: 8px; background: #fff; }
.confirmation-copy { margin: 0; border-left: 3px solid var(--success); padding-left: 11px; font-size: .92rem; font-weight: 700; }
.pin-input-inline { font-size: 1.2rem; }
.homework-history { margin-top: 24px; }
.homework-history-list { display: grid; gap: 14px; }
.homework-history .shared-homework-week { border-top: 1px solid var(--border); padding-top: 22px; }
.history-week-row { display: grid; gap: 8px; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; background: var(--surface-soft); }
.history-week-item { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

.modal-overlay { position: fixed; z-index: 900; inset: 0; display: grid; place-items: center; padding: 16px; background: rgb(5 8 15 / 70%); }
.modal-card { position: relative; width: min(480px, 100%); max-height: calc(100vh - 32px); overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; background: var(--surface); box-shadow: var(--shadow); }
.modal-close { position: absolute; top: 12px; right: 12px; }
.pin-input { max-width: 180px; font-size: 1.6rem; letter-spacing: .35em; text-align: center; }
.form-error { min-height: 1.5em; margin: 0; color: var(--danger); }

.account-admin { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.account-panel { overflow: hidden; min-width: 0; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-soft); }
.account-panel .section-intro { margin: 0 0 18px; }
.compact-panel-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 14px 16px; font-weight: 800; cursor: pointer; list-style: none; }
.compact-panel-summary::-webkit-details-marker { display: none; }
.compact-panel-summary::after { content: "›"; color: var(--primary); font-size: 1.4rem; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
details[open] > .compact-panel-summary::after { transform: rotate(-90deg); }
.compact-panel-summary:hover, .compact-panel-summary:focus-visible { background: color-mix(in srgb, var(--primary-soft) 55%, transparent); }
.compact-panel-content { border-top: 1px solid var(--border); padding: 16px; }
.account-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.account-linked-students .target-list { padding-left: 0; }
.account-access-editor { margin-top: 16px; }
.account-summary { display: grid; gap: 2px; border-left: 3px solid var(--primary); padding-left: 11px; }
.account-summary span { overflow-wrap: anywhere; color: var(--muted); font-size: .9rem; }
.account-directory-list { display: grid; gap: 10px; }
.account-directory-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.account-role { flex: none; color: var(--primary); font-size: .85rem; font-weight: 800; text-align: right; }
.account-merge-panel { grid-column: 1 / -1; }
.account-merge-form { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: end; }
.account-merge-form .field-help, .account-merge-form .form-error { grid-column: 1 / -1; }
.account-merge-form .button { justify-self: start; }

.board-list { display: grid; gap: 18px; }
.penalty-admin-panel { overflow: hidden; border: 1px solid color-mix(in srgb, var(--warning) 45%, var(--border)); border-radius: 14px; background: var(--surface-soft); }
.penalty-admin-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px; padding: 15px 18px; cursor: pointer; list-style: none; }
.penalty-admin-summary::-webkit-details-marker { display: none; }
.penalty-admin-summary span { color: var(--muted); font-size: .86rem; font-weight: 700; }
.penalty-admin-summary::after { content: "›"; color: var(--warning); font-size: 1.45rem; font-weight: 800; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.penalty-admin-panel[open] .penalty-admin-summary::after { transform: rotate(-90deg); }
.penalty-admin-content { border-top: 1px solid var(--border); padding: 16px 18px 18px; }
.penalty-admin-content .section-intro { margin-bottom: 0; }
.penalty-admin-list { display: grid; gap: 10px; margin-top: 14px; }
.penalty-admin-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; border: 1px solid var(--border); border-radius: 11px; padding: 12px 14px; background: var(--surface); }
.penalty-admin-row.is-due { border-color: color-mix(in srgb, var(--danger) 55%, var(--border)); }
.penalty-admin-row p { margin: 3px 0 0; color: var(--muted); }
.homework-records-panel { overflow: hidden; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-soft); }
.homework-records-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px; padding: 15px 18px; cursor: pointer; list-style: none; }
.homework-records-summary::-webkit-details-marker { display: none; }
.homework-records-summary::after { content: "›"; color: var(--primary); font-size: 1.45rem; font-weight: 800; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.homework-records-panel[open] .homework-records-summary::after { transform: rotate(-90deg); }
.homework-record-count { color: var(--muted); font-size: .86rem; font-weight: 700; }
.homework-records-content { border-top: 1px solid var(--border); padding: 16px 18px 18px; }
.homework-records-content > .section-intro { color: var(--muted); }
.homework-record-filters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.homework-record-list { display: grid; gap: 9px; }
.homework-record-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px; border: 1px solid var(--border); border-radius: 11px; padding: 11px 12px; background: var(--surface); }
.homework-record-identity { display: grid; min-width: 0; }
.homework-record-identity span, .homework-record-identity small { overflow-wrap: anywhere; color: var(--muted); }
.homework-record-identity small { font-size: .76rem; }
.board-assignment { overflow: hidden; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-soft); }
.board-assignment-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 14px; padding: 14px 18px; cursor: pointer; list-style: none; }
.board-assignment-summary::-webkit-details-marker { display: none; }
.board-assignment-summary:hover, .board-assignment-summary:focus-visible { background: color-mix(in srgb, var(--primary-soft) 55%, transparent); }
.board-assignment-summary::after { content: "›"; color: var(--primary); font-size: 1.55rem; font-weight: 800; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.board-assignment[open] > .board-assignment-summary::after { transform: rotate(-90deg); }
.board-assignment-title { min-width: 0; }
.board-assignment-title h3 { margin: 0 0 2px; overflow-wrap: anywhere; font-size: 1.05rem; }
.board-assignment-title .due-date, .board-assignment-title .board-week-range { display: inline; margin: 0 8px 0 0; font-size: .8rem; }
.board-assignment-summary > .board-summary { margin: 0; text-align: right; }
.board-assignment-content { border-top: 1px solid var(--border); padding: 16px 18px 18px; }
.board-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; }
.board-heading .section-intro { margin: 0; color: var(--muted); }
.student-preview-panel { overflow: hidden; margin-top: 14px; border: 1px solid color-mix(in srgb, var(--primary) 40%, var(--border)); border-radius: 12px; background: var(--surface); }
.student-preview-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px; padding: 12px 14px; cursor: pointer; list-style: none; }
.student-preview-summary::-webkit-details-marker { display: none; }
.student-preview-summary::after { content: "›"; color: var(--primary); font-size: 1.3rem; font-weight: 800; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.student-preview-panel[open] > .student-preview-summary::after { transform: rotate(-90deg); }
.student-preview-summary span { color: var(--muted); font-size: .85rem; }
.student-preview-content { display: grid; gap: 12px; border-top: 1px solid var(--border); padding: 14px; background: var(--surface-soft); }
.student-preview-content .section-intro, .student-preview-empty { margin: 0; color: var(--muted); }
.admin-student-preview-card { width: min(720px, 100%); }
.admin-student-preview-card > h4 { margin-bottom: 8px; }
.assigned-students-panel { overflow: hidden; margin-top: 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.assigned-students-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px; padding: 12px 14px; cursor: pointer; list-style: none; }
.assigned-students-summary::-webkit-details-marker { display: none; }
.assigned-students-summary::after { content: "›"; color: var(--primary); font-size: 1.3rem; font-weight: 800; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.assigned-students-panel[open] > .assigned-students-summary::after { transform: rotate(-90deg); }
.assigned-students-summary span { color: var(--muted); font-size: .85rem; }
.assigned-students-content { display: grid; gap: 12px; border-top: 1px solid var(--border); padding: 14px; }
.assigned-students-content .section-intro { margin: 0; color: var(--muted); }
.assigned-student-list { display: grid; gap: 8px; }
.assigned-student-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px; border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; background: var(--surface-soft); }
.assigned-student-identity { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; min-width: 0; }
.assigned-student-identity strong { overflow-wrap: anywhere; }
.assigned-student-identity .student-state { font-size: .75rem; }
.assignment-add-panel { border-top: 1px solid var(--border); padding-top: 12px; }
.assignment-add-panel > summary { width: fit-content; color: var(--primary); font-weight: 800; cursor: pointer; }
.assignment-add-form { display: grid; gap: 12px; margin-top: 12px; }
.assignment-add-form > .button { justify-self: start; }
.assignment-add-targets { padding-left: 0; }
.assigned-students-empty { margin: 0; color: var(--muted); font-size: .9rem; }
.status-missing { background: var(--surface); color: var(--muted); }
.board-summary { margin-bottom: 5px; }
.board-summary { color: var(--muted); font-size: .9rem; }
.board-week-range { margin-bottom: 3px; color: var(--primary); font-weight: 800; text-transform: capitalize; }
.board-parent-signature { display: grid; flex-basis: 100%; gap: 5px; color: var(--muted); font-size: .85rem; }
.board-parent-signature p { margin: 0; }
.board-quick-actions { width: 100%; }
.quick-complete-label { color: var(--success); font-size: .9rem; font-weight: 800; }
.advanced-status-controls { width: 100%; color: var(--muted); font-size: .82rem; }
.advanced-status-controls summary { width: fit-content; color: var(--primary); font-weight: 800; cursor: pointer; }
.advanced-status-controls .status-override { margin-top: 8px; }
.table-scroll { max-width: 100%; overflow-x: auto; margin-top: 14px; }
.board-table { width: 100%; border-collapse: collapse; background: var(--surface); }
.board-table th, .board-table td { border-bottom: 1px solid var(--border); padding: 12px; text-align: left; vertical-align: top; }
.board-table th { color: var(--muted); font-size: .78rem; text-transform: uppercase; }
.board-status-cell { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.status-override { width: auto; min-width: 150px; padding: 7px 9px; font-size: .85rem; }

.roll-call-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 14px; margin-bottom: 16px; }
.roll-call-toolbar .form-field { width: min(260px, 100%); }
.roll-call-list { display: grid; gap: 10px; margin-bottom: 18px; }
.roll-call-row { display: grid; grid-template-columns: minmax(150px, 1fr) minmax(440px, 2fr); align-items: center; gap: 14px; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; background: var(--surface-soft); }
.attendance-segments { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; }
.attendance-segment { min-height: 42px; border: 1px solid var(--border); border-radius: 9px; padding: 7px; background: var(--surface); color: var(--text); font-weight: 800; cursor: pointer; }
.attendance-segment.is-selected { border-color: var(--primary); outline: 2px solid var(--primary); background: var(--primary-soft); }
.attendance-history { display: grid; gap: 10px; margin-top: 28px; }
.history-date { border: 1px solid var(--border); border-radius: 11px; padding: 12px 14px; background: var(--surface-soft); }
.history-date summary { font-weight: 800; cursor: pointer; }
.history-student-list { display: grid; gap: 7px; margin: 12px 0 0; padding: 0; list-style: none; }
.history-student-list li { display: flex; justify-content: space-between; gap: 14px; }
.history-student-list li > :first-child { min-width: 0; overflow-wrap: anywhere; }
.attendance-chip { border-radius: 999px; padding: 3px 9px; background: var(--surface); font-size: .78rem; font-weight: 800; }

.practice-progress { display: grid; gap: 7px; margin-bottom: 18px; }
.progress-track { height: 12px; overflow: hidden; border-radius: 999px; background: var(--surface-soft); }
.progress-fill { width: 0; height: 100%; border-radius: inherit; background: var(--primary); transition: width .2s ease; }
.practice-form { display: grid; grid-template-columns: 130px minmax(220px, 1fr) auto; align-items: end; gap: 12px; }
.practice-entries { display: grid; gap: 9px; margin-top: 24px; }
.practice-entry { display: grid; grid-template-columns: 120px 130px 1fr; gap: 12px; border-bottom: 1px solid var(--border); padding: 9px 0; }
.practice-entry-note { color: var(--muted); }
.resource-list { display: grid; gap: 12px; }
.resource-item { border: 1px solid var(--border); border-radius: 12px; padding: 14px; background: var(--surface-soft); }
.resource-item a { overflow-wrap: anywhere; font-weight: 800; }
.resource-item p { margin: 5px 0 0; color: var(--muted); }
.admin-resource-list { margin-top: 22px; }
.resource-create-panel { overflow: hidden; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-soft); }
.admin-resource-item { overflow: hidden; padding: 0; }
.resource-item-summary { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 13px 14px; font-weight: 800; cursor: pointer; list-style: none; }
.resource-item-summary::-webkit-details-marker { display: none; }
.resource-item-summary::after { content: "›"; color: var(--primary); font-size: 1.35rem; line-height: 1; transform: rotate(90deg); transition: transform .18s ease; }
.admin-resource-item[open] > .resource-item-summary::after { transform: rotate(-90deg); }
.resource-item-content { display: grid; gap: 10px; border-top: 1px solid var(--border); padding: 14px; }
.resource-item-content p { margin: 0; color: var(--muted); }
.resource-item-content .button { justify-self: start; }
.student-attendance-list { display: grid; gap: 8px; }
.student-attendance-row { display: flex; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--border); padding: 9px 0; }
.student-detail-toggle, .student-detail { grid-column: 1 / -1; }
.student-detail { border-top: 1px solid var(--border); padding-top: 12px; color: var(--muted); }
.compact-list { margin: 7px 0 0; padding-left: 20px; }

.auth-screen {
  width: min(520px, calc(100% - 32px));
  margin: 12vh auto 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(24px, 6vw, 42px);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.auth-screen .button { display: inline-flex; margin-top: 10px; align-items: center; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding: 8px 4px;
  color: var(--muted);
  font-size: .9rem;
}

.link-button {
  border: 0;
  padding: 0;
  background: none;
  color: var(--primary);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

/* Login page (kept as the existing non-module auth flow). */
.login-page { min-height: 100svh; }
.container { width: min(1000px, calc(100% - 32px)); margin: 0 auto; text-align: center; }
.login-card { width: min(500px, 100%); margin: clamp(72px, 8vh, 110px) auto 32px; text-align: center; }
.login-card h1 { margin-bottom: 10px; }
.login-card #form-subtitle { color: var(--muted); }
.instructor-login-note { border-radius: 10px; padding: 11px 13px; background: var(--primary-soft); color: var(--text); font-size: .9rem; text-align: left; }
.tab-container { display: flex; margin-bottom: 20px; }
.tab-btn { flex: 1; min-height: 44px; border: 1px solid var(--border); padding: 10px; background: var(--surface-soft); color: var(--text); font-weight: 800; cursor: pointer; }
.tab-btn:first-child { border-radius: 10px 0 0 10px; }
.tab-btn:last-child { border-radius: 0 10px 10px 0; }
.tab-btn.active { border-color: var(--primary); background: var(--primary); color: #fff; }
.form-container { display: grid; gap: 14px; }
.form-container input { margin: 0; }
.login-field { display: grid; gap: 6px; color: var(--text); font-weight: 800; text-align: left; }
.login-btn { display: inline-block; min-height: 48px; border: 0; border-radius: 12px; padding: 10px 18px; background: var(--success); color: #fff; font-weight: 800; text-decoration: none; cursor: pointer; }
.login-back-link { display: inline-block; margin-top: 20px; font-weight: 800; }
.form-message { margin: 0; border-radius: 10px; padding: 11px 13px; background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); text-align: left; }
.form-message[hidden] { display: none; }
.form-message-success { background: color-mix(in srgb, var(--success) 12%, transparent); color: var(--success); }
#forgot-password-link { justify-self: center; font-size: .9rem; font-weight: 800; }
#back-to-login { justify-self: center; }
#theme-switcher { position: fixed; z-index: 30; top: max(16px, env(safe-area-inset-top)); right: max(16px, env(safe-area-inset-right)); }
#theme-switcher #theme-toggle { min-width: 48px; min-height: 44px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); cursor: pointer; }
.theme-icon-light { display: none; }
:root[data-theme="light"] .theme-icon-dark { display: none; }
:root[data-theme="light"] .theme-icon-light { display: inline; }

.toast-region {
  position: fixed;
  z-index: 1000;
  right: 18px;
  bottom: 18px;
  display: grid;
  gap: 8px;
  width: min(360px, calc(100% - 36px));
}

.toast {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 13px 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.toast[data-kind="error"] { border-color: var(--danger); }

@media (max-width: 940px) {
  .site-header { align-items: flex-start; flex-wrap: wrap; }
  .site-header > :first-child { flex: 1 1 420px; }
  .header-actions { flex: 1 1 100%; justify-content: flex-start; }
}

@media (max-width: 760px) {
  body { background-attachment: scroll; }
  body::before, body::after { opacity: .45; }
  .page-shell { width: 100%; padding: 14px max(12px, env(safe-area-inset-right)) calc(34px + env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
  .site-header { align-items: stretch; flex-direction: column; gap: 14px; margin-bottom: 18px; }
  /* The tablet row uses a 420px flex basis for the title. Reset it when the
     header becomes a column or that basis turns into 420px of empty height. */
  .site-header > :first-child { flex: 0 1 auto; }
  .header-actions {
    display: grid;
    grid-template-columns: auto auto minmax(120px, 1fr);
    width: 100%;
    gap: 8px;
  }
  .header-actions:has(.header-menu) { grid-template-columns: auto auto auto minmax(120px, 1fr); }
  .header-actions .header-menu { min-width: 0; }
  .header-actions .button { min-width: 0; text-align: center; }
  .header-actions #admin-link { grid-column: 1 / -1; }
  .header-actions #logout-button { width: 100%; }
  .header-menu-panel { right: auto; left: 0; max-width: calc(100vw - 24px); }
  .portal-tabs {
    position: static;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
    margin: 0 0 14px;
  }
  .portal-tab { min-height: 48px; padding-inline: 10px; white-space: normal; }
  .family-content .portal-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); overflow: visible; }
  .family-content .portal-tab { min-width: 0; padding-inline: 6px; white-space: normal; }
  .card { border-radius: 14px; padding: 16px; }
  .card[data-tab-panel] { padding-top: 16px; }
  .status-strip { grid-template-columns: 1fr; gap: 8px; }
  .status-strip-cell { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
  .status-strip-value { justify-content: flex-end; margin-top: 0; text-align: right; }
  .status-strip-progress { width: min(68%, 310px); }
  .homework-week-banner { flex-wrap: wrap; }
  .homework-week-banner h3 { width: 100%; }
  .due-chip { max-width: 100%; white-space: normal; }
  .audience-heading { gap: 11px; margin-bottom: 16px; }
  .audience-heading-icon { flex-basis: 42px; width: 42px; height: 42px; border-radius: 12px; }
  .homework-card-heading { align-items: flex-start; flex-wrap: wrap; }
  .weekly-assignment { padding: 14px; }
  .parent-homework-summary, .parent-homework-content { padding: 14px; }
  .simple-parent-form { gap: 12px; }
  .simple-parent-form input, input, textarea, select { font-size: 16px; }
  .parent-submit { width: 100%; min-height: 50px; }
  .video-attachment iframe { width: 100%; }
  .site-footer { align-items: flex-start; flex-direction: column; }
  .student-row-summary { grid-template-columns: minmax(0, 1fr) auto; gap: 5px 10px; }
  .student-row-summary .student-identity { grid-column: 1; }
  .student-row-summary::after { grid-column: 2; grid-row: 1 / span 3; }
  .student-summary-instrument, .student-summary-status { grid-column: 1; justify-self: start; }
  .student-row-content { grid-template-columns: 1fr; gap: 14px; padding: 14px; }
  .inline-field { display: grid; grid-template-columns: minmax(0, 1fr) auto; }
  .pin-controls { flex-wrap: wrap; }
  .attachment-row { grid-template-columns: 1fr 44px; }
  .attachment-row input { grid-column: 1 / -1; }
  .attachment-row .danger-button { grid-column: 2; grid-row: 1; }
  .shared-homework-grid { grid-template-columns: 1fr; }
  .signature-options { grid-template-columns: 1fr; }
  .target-list { grid-template-columns: 1fr; padding-left: 0; }
  .student-context { align-items: stretch; flex-direction: column; width: 100%; }
  .student-context select { width: 100%; }
  .account-admin, .account-form-grid, .account-merge-form, .roster-create-form { grid-template-columns: 1fr; }
  .account-directory-row { align-items: flex-start; flex-direction: column; }
  .account-role { text-align: left; }
  .roster-create-form .account-form-grid { grid-column: auto; }
  .board-heading { flex-direction: column; }
  .board-heading > .button { width: 100%; }
  .board-assignment { padding: 0; }
  .board-assignment-summary, .penalty-admin-summary, .homework-records-summary { grid-template-columns: minmax(0, 1fr) auto; gap: 5px 10px; padding: 13px 14px; }
  .board-assignment-summary > .board-summary, .penalty-admin-summary span, .homework-record-count { grid-column: 1; margin: 0; text-align: left; }
  .board-assignment-summary::after, .penalty-admin-summary::after, .homework-records-summary::after { grid-column: 2; grid-row: 1 / span 2; }
  .board-assignment-content, .penalty-admin-content, .homework-records-content { padding: 14px; }
  .student-preview-summary { grid-template-columns: minmax(0, 1fr) auto; }
  .student-preview-summary span { grid-column: 1; }
  .student-preview-summary::after { grid-column: 2; grid-row: 1 / span 2; }
  .assigned-students-summary { grid-template-columns: minmax(0, 1fr) auto; }
  .assigned-students-summary span { grid-column: 1; }
  .assigned-students-summary::after { grid-column: 2; grid-row: 1 / span 2; }
  .assigned-student-row { grid-template-columns: minmax(0, 1fr) auto; }
  .assigned-student-row > .status-badge { grid-column: 1; justify-self: start; }
  .assigned-student-row > .button { grid-column: 2; grid-row: 1 / span 2; }
  .assignment-add-form > .button { justify-self: stretch; width: 100%; }
  .homework-record-filters, .homework-record-row { grid-template-columns: 1fr; }
  .homework-record-row > .status-badge { justify-self: start; }
  .homework-record-row > .button { width: 100%; }
  .board-table, .board-table tbody, .board-table tr, .board-table td { display: block; width: 100%; }
  .board-table thead { display: none; }
  .board-table tr { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
  .board-table tr + tr { margin-top: 12px; }
  .board-table td { display: grid; grid-template-columns: minmax(88px, .35fr) minmax(0, 1fr); gap: 12px; border: 0; padding: 11px 12px; }
  .board-table td + td { border-top: 1px solid var(--border); }
  .board-table td::before { content: attr(data-label); color: var(--muted); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
  .board-status-cell { min-width: 0; }
  .board-quick-actions .button { flex: 1 1 130px; }
  .advanced-status-controls .status-override { width: 100%; }
  .table-scroll { overflow: visible; }
  .roll-call-toolbar { align-items: stretch; flex-direction: column; }
  .roll-call-row { grid-template-columns: 1fr; }
  .attendance-segments { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .practice-form, .practice-entry { grid-template-columns: 1fr; }
  .resource-item-content .button { justify-self: stretch; width: 100%; }
  .history-student-list li { align-items: flex-start; flex-wrap: wrap; }
  .site-footer { margin-top: 20px; }
  .toast-region { right: 12px; bottom: 12px; width: calc(100% - 24px); }
  .modal-overlay { align-items: end; padding: 0; }
  .modal-card { width: 100%; max-height: min(88svh, 760px); border-radius: 18px 18px 0 0; padding: 22px 18px calc(22px + env(safe-area-inset-bottom)); }
  .login-card { margin-top: 68px; padding: 20px; }
}

@media (max-width: 420px) {
  h1 { font-size: 1.65rem; }
  .page-shell { padding-inline: max(10px, env(safe-area-inset-left)) max(10px, env(safe-area-inset-right)); }
  .header-actions { grid-template-columns: auto auto minmax(96px, 1fr); }
  .header-actions:has(.header-menu) { grid-template-columns: auto auto minmax(96px, 1fr); }
  .header-actions #theme-toggle { grid-column: 1; }
  .header-actions #lang-toggle { grid-column: 2; }
  .header-actions #logout-button { grid-column: 3; }
  .header-actions #admin-link { grid-column: 1 / -1; }
  .header-actions:has(#admin-link:not([hidden])) #admin-link { grid-row: 1; }
  .header-actions:has(#admin-link:not([hidden])) #theme-toggle,
  .header-actions:has(#admin-link:not([hidden])) #lang-toggle,
  .header-actions:has(#admin-link:not([hidden])) #logout-button { grid-row: 2; }
  .header-actions:has(.header-menu) .header-menu { grid-column: 1; grid-row: 1; }
  .header-actions:has(.header-menu) #theme-toggle { grid-column: 2; grid-row: 1; }
  .header-actions:has(.header-menu) #lang-toggle { grid-column: 3; grid-row: 1; }
  .header-actions:has(.header-menu) #logout-button { grid-column: 1 / -1; grid-row: 2; }
  .card, .card[data-tab-panel] { padding: 14px; }
  .family-content .portal-tab { font-size: .84rem; }
  .audience-heading-icon { display: none; }
  .parent-homework-summary { grid-template-columns: minmax(0, 1fr) auto; gap: 8px; padding: 12px; }
  .parent-homework-details > .parent-homework-summary { grid-template-columns: minmax(0, 1fr) auto auto; }
  .parent-homework-summary-copy { display: grid; gap: 2px; }
  .homework-entry-separator { display: none; }
  .parent-homework-content, .weekly-assignment { padding: 12px; }
  .history-week-item { align-items: flex-start; flex-direction: column; }
  .student-line-item { align-items: flex-start; flex-direction: column; }
  .penalty-admin-row { align-items: stretch; flex-direction: column; }
  .penalty-admin-row .button { width: 100%; }
  .status-strip-cell { align-items: flex-start; flex-direction: column; }
  .status-strip-value { justify-content: flex-start; width: 100%; text-align: left; }
  .status-strip-progress { width: 100%; }
  .board-table td { grid-template-columns: 1fr; gap: 6px; }
  .board-quick-actions { display: grid; grid-template-columns: 1fr; }
  .board-quick-actions .button { width: 100%; }
  .attendance-segment { min-height: 48px; padding-inline: 5px; }
  .login-card { padding: 16px 14px; }
  .tab-btn { padding-inline: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}