:root {
    color-scheme: light;
    --bg: #f7fbff;
    --surface: #ffffff;
    --surface-soft: #eef8ff;
    --text: #183044;
    --muted: #6f8191;
    --line: #dcebf5;
    --primary: #3f9df6;
    --primary-strong: #1877d3;
    --mint: #66d7c3;
    --success: #5bc489;
    --warning: #f6a94d;
    --error: #ee6b6e;
    --shadow: 0 10px 32px rgba(56, 117, 166, .12);
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #111820;
    --surface: #18232d;
    --surface-soft: #20323f;
    --text: #eef7ff;
    --muted: #9eb1bf;
    --line: #2d4657;
    --primary: #62b6ff;
    --primary-strong: #8ccbff;
    --mint: #72dfcf;
    --success: #74d79c;
    --warning: #f2b15f;
    --error: #f07a7d;
    --shadow: 0 10px 32px rgba(0, 0, 0, .24);
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

html {
    overflow-y: auto;
}

html.scroll-locked {
    overflow: hidden;
}

html:not(.scroll-locked) {
    overflow-y: auto !important;
}

body.menu-open {
    overflow: hidden;
}

/* Safety net: if legacy inline overflow remains, restore page scrolling unless menu/modal is open */
body:not(.menu-open) {
    overflow-y: auto !important;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.notification-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    color: var(--text);
    font-size: 18px;
}

.notification-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 19px;
    height: 19px;
    padding: 0 5px;
    border-radius: 999px;
    background: var(--error);
    color: #fff;
    font-size: 10px;
    font-weight: 900;
    line-height: 19px;
    text-align: center;
}

.menu-button {
    display: inline-flex;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}

.menu-button-bar {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
}

.app-menu {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: none;
    justify-content: flex-end;
}

.app-menu.is-open {
    display: flex;
}

.app-menu-overlay {
    position: absolute;
    inset: 0;
    border: 0;
    margin: 0;
    padding: 0;
    background: rgba(11, 24, 36, .45);
    backdrop-filter: blur(6px);
    cursor: pointer;
}

.app-menu-panel {
    position: relative;
    z-index: 1;
    width: min(88vw, 320px);
    height: 100vh;
    height: 100dvh;
    max-height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border-left: 1px solid var(--line);
    box-shadow: -16px 0 48px rgba(11, 24, 36, .18);
    transform: translateX(100%);
    transition: transform .22s ease;
}

.app-menu.is-open .app-menu-panel {
    transform: translateX(0);
}

.app-menu-head {
    flex: 0 0 auto;
    padding: calc(18px + env(safe-area-inset-top)) 18px 14px;
    border-bottom: 1px solid var(--line);
}

.app-menu-eyebrow {
    margin: 0 0 4px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.app-menu-head h2 {
    margin: 0;
    font-size: 20px;
    line-height: 1.2;
}

.app-menu-nav {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-content: flex-start;
    padding: 10px 12px;
    overflow: auto;
}

.app-menu-link {
    display: block;
    flex: 0 0 auto;
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--text);
    font-size: 15px;
    font-weight: 800;
    line-height: 1.25;
}

.app-menu-link.active {
    background: color-mix(in srgb, var(--primary) 12%, var(--surface-soft));
    color: var(--primary-strong);
}

.app-menu-footer {
    flex: 0 0 auto;
    margin: 0;
    padding: 12px 18px calc(18px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: var(--surface);
}

.app-menu-logout {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface-soft);
    color: var(--text);
    font-size: 15px;
    font-weight: 800;
    cursor: pointer;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--mint));
    color: white;
    font-weight: 900;
}

.brand strong,
.brand small {
    display: block;
}

.brand small {
    color: var(--muted);
    font-size: 11px;
}

.app-main {
    width: min(100%, 980px);
    margin: 0 auto;
    padding: 18px 16px 32px;
}

.auth-page {
    display: grid;
    place-items: center;
    padding: 24px 16px;
}

.auth-shell {
    width: min(100%, 430px);
}

.signup-shell {
    width: min(100%, 460px);
}

.auth-card,
.form-card,
.profile-card,
.hero-panel,
.list-card,
.metric-card,
.calendar-strip,
.empty-state {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.auth-card {
    padding: 24px;
}

.login-card {
    padding: 28px 24px 24px;
}

.signup-card {
    padding: 28px 24px;
}

.list-card-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.signup-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.signup-title h1 {
    font-size: 25px;
}

.brand-mark.small {
    width: 42px;
    height: 42px;
    border-radius: 14px;
}

.complete-card {
    text-align: center;
}

.complete-mark {
    display: grid;
    place-items: center;
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: 20px;
    background: color-mix(in srgb, var(--success) 18%, var(--surface));
    color: var(--success);
    font-size: 28px;
    font-weight: 900;
    line-height: 1;
    white-space: nowrap;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 900;
}

.complete-copy {
    margin: 12px 0 18px;
    color: var(--muted);
    line-height: 1.55;
}

.summary-box {
    display: grid;
    gap: 4px;
    margin: 18px 0;
    padding: 14px;
    border-radius: 16px;
    background: var(--surface-soft);
}

.summary-box span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.center-link {
    display: inline-block;
    margin-top: 14px;
}

.auth-brand {
    margin-bottom: 24px;
}

.login-submit {
    margin-top: 2px;
}

.remember-row {
    color: var(--text);
    font-size: 14px;
}

.remember-row input {
    accent-color: var(--primary);
}

.field-group {
    display: grid;
    gap: 14px;
}

.hero-panel {
    padding: 22px;
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 20%, var(--surface)), color-mix(in srgb, var(--mint) 20%, var(--surface)));
}

.hero-panel p,
.hero-panel h1 {
    margin: 0;
}

.hero-panel p {
    color: var(--primary-strong);
    font-weight: 700;
}

.hero-panel h1 {
    margin-top: 8px;
    font-size: 24px;
    line-height: 1.25;
}

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

.metric-card {
    padding: 16px;
    text-align: left;
}

.metric-card span {
    display: block;
    text-align: left;
    color: var(--muted);
    font-size: 13px;
}

.dashboard-metric-grid .metric-card span {
    color: #63b9ff;
    font-size: 14px;
    letter-spacing: 0;
}

.teacher-dashboard-metric-grid .metric-card span {
    white-space: nowrap;
    font-size: 12px;
    letter-spacing: -0.01em;
}

.dashboard-metric-grid .metric-card strong {
    font-size: 22px;
}

.metric-card strong {
    display: block;
    margin-top: 6px;
    text-align: left;
    font-size: 24px;
}

.metric-card.warning strong {
    color: var(--warning);
}

.section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 20px 0 10px;
}

.section-head h1,
.section-head h2,
h1,
h2 {
    margin: 0;
    line-height: 1.25;
}

h1 {
    font-size: 24px;
}

h2 {
    font-size: 18px;
}

.quick-actions,
.segmented {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.quick-actions.quick-actions-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.quick-actions.quick-actions-two .soft-button {
    white-space: nowrap;
}

.tab-bar {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin: 0 0 12px;
    padding: 4px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface-soft);
}

.tab-bar.tab-bar-four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tab-bar.tab-bar-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tab-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 40px;
    border: 0;
    border-radius: 12px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 13px;
    font-weight: 900;
    text-decoration: none;
    line-height: 1;
    transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.tab-button.is-active {
    background: var(--surface);
    color: var(--primary-strong);
    box-shadow: var(--shadow);
}

.tab-panel {
    display: block;
}

.list-card,
.profile-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px;
    margin-bottom: 10px;
}

.list-card p,
.profile-card p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.homeworks-list-keyline {
    margin-top: 3px;
    color: var(--text);
    font-size: 15px;
    font-weight: 800;
    letter-spacing: -0.01em;
    word-break: keep-all;
    overflow-wrap: anywhere;
}

.homeworks-group-summary {
    display: grid;
    gap: 2px;
    flex: 1 1 auto;
    min-width: 0;
}

.homeworks-view-toggle {
    margin-bottom: 12px;
}

.homework-period-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0 12px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
}

.homework-period-input {
    position: relative;
    flex: 1 1 0;
    min-width: 0;
}

.homework-period-input input[type="date"] {
    min-height: 34px;
    padding: 6px 8px;
    border: 0;
    background: transparent;
    color: var(--text);
    font-size: 13px;
    font-weight: 700;
}

.homework-period-sep {
    flex: 0 0 auto;
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
}

.homeworks-accordion {
    margin-bottom: 12px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.homeworks-accordion[open] {
    border-color: color-mix(in srgb, var(--primary) 40%, var(--line));
}

.homeworks-accordion-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px;
    cursor: pointer;
    list-style: none;
}

.homeworks-accordion-summary::-webkit-details-marker {
    display: none;
}

.homeworks-accordion-summary::marker {
    content: "";
}

.homeworks-accordion-main {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.homeworks-accordion-meta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.homeworks-accordion-arrow {
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    transform: rotate(45deg);
    transition: transform .18s ease;
    margin-top: -2px;
}

.homeworks-accordion[open] .homeworks-accordion-arrow {
    transform: rotate(-135deg);
    margin-top: 2px;
}

.homeworks-accordion-body {
    padding: 0 10px 10px;
}

.homeworks-grouped-item {
    margin-bottom: 8px;
}

.homeworks-grouped-item:last-child {
    margin-bottom: 0;
}

.homeworks-list-title {
    margin: 0;
    color: var(--text);
    font-size: 17px;
    font-weight: 900;
    letter-spacing: -0.01em;
    word-break: keep-all;
    overflow-wrap: anywhere;
}

.homeworks-list-date {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
}

.homeworks-group-badges {
    flex: 0 0 auto;
    flex-direction: column;
    align-items: flex-end;
    flex-wrap: nowrap;
}

.homeworks-group-badges .badge {
    white-space: nowrap;
}

.badge {
    flex: 0 0 auto;
    padding: 6px 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
}

.badge-stack {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}

.badge.success {
    background: color-mix(in srgb, var(--success) 18%, transparent);
    color: var(--success);
}

.badge.warning {
    background: color-mix(in srgb, var(--warning) 18%, transparent);
    color: var(--warning);
}

.badge.error {
    background: color-mix(in srgb, var(--error) 18%, transparent);
    color: var(--error);
}

.badge.info {
    background: color-mix(in srgb, var(--primary) 18%, transparent);
    color: var(--primary-strong);
}

.badge.muted {
    background: color-mix(in srgb, var(--muted) 20%, transparent);
    color: color-mix(in srgb, var(--muted) 82%, var(--text));
}

.primary-button,
.primary-mini,
.soft-button,
.icon-button {
    border: 0;
    cursor: pointer;
    min-height: 44px;
    border-radius: 14px;
    font-weight: 800;
}

.primary-button,
.primary-mini {
    background: var(--primary);
    color: white;
}

.primary-button {
    width: 100%;
    padding: 12px 16px;
}

.primary-mini {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 64px;
    padding: 0 14px;
}

.soft-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 12px;
    background: var(--surface-soft);
    color: var(--primary-strong);
}

.soft-button.compact {
    min-height: 38px;
    padding: 8px 10px;
}

.soft-button.warning {
    border: 1px solid color-mix(in srgb, var(--warning) 42%, var(--line));
    background: color-mix(in srgb, var(--warning) 14%, var(--surface));
    color: var(--warning);
}

.soft-button.is-disabled {
    opacity: 0.55;
    pointer-events: none;
}

.logout-button {
    min-height: 38px;
    border-radius: 12px;
    font-size: 12px;
}

.icon-button {
    width: 42px;
    background: var(--surface-soft);
    color: var(--text);
}

.form-stack,
.form-card {
    display: grid;
    gap: 14px;
}

.form-card {
    padding: 16px;
    margin-top: 12px;
}

label,
fieldset {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

fieldset {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 12px;
}

legend {
    padding: 0 5px;
}

.course-type-field {
    gap: 10px;
}

.course-type-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.choice-card {
    display: block;
    color: var(--text);
}

.choice-card input {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    opacity: 0;
    pointer-events: none;
}

.choice-card span {
    display: grid;
    gap: 5px;
    min-height: 86px;
    padding: 13px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
}

.choice-card strong {
    font-size: 15px;
}

.choice-card small {
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.45;
}

.choice-card input:checked + span {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 12%, var(--surface));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 26%, transparent);
}

.optional-panel {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: color-mix(in srgb, var(--surface-soft) 52%, var(--surface));
    overflow: hidden;
}

.optional-panel summary {
    cursor: pointer;
    padding: 14px;
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 900;
}

.optional-panel .field-group {
    padding: 0 14px 14px;
}

input,
select,
textarea {
    width: 100%;
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    color: var(--text);
    padding: 10px 12px;
}

textarea {
    resize: vertical;
}

.check-row {
    display: flex;
    grid-template-columns: none;
    align-items: center;
    gap: 8px;
}

.check-row input {
    width: 18px;
    min-height: 18px;
}

.notification-target-toggle-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.notification-target-toggle {
    display: block;
    color: var(--text);
    cursor: pointer;
}

.notification-target-toggle input[type="checkbox"] {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    opacity: 0;
}

.notification-target-toggle span {
    display: grid;
    place-items: center;
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--surface);
    color: var(--muted);
    font-size: 13px;
    font-weight: 900;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.notification-target-toggle input[type="checkbox"]:checked ~ span {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 16%, var(--surface));
    color: var(--primary-strong);
}

.agreement-box {
    display: grid;
    gap: 10px;
    padding: 14px 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: color-mix(in srgb, var(--surface-soft) 46%, var(--surface));
}

.agreement-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: 10px;
    color: var(--text);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.45;
}

.agreement-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
}

.agreement-row input {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    min-height: 18px;
    margin: 1px 0 0;
    padding: 0;
    accent-color: var(--primary);
}

.agreement-row span {
    display: block;
}

.agreement-copy {
    color: var(--text);
}

@media (max-width: 360px) {
    .agreement-row {
        grid-template-columns: minmax(0, 1fr);
        gap: 6px;
    }

    .agreement-row .inline-link {
        justify-self: start;
        margin-left: 28px;
    }
}

.inline-link {
    appearance: none;
    border: 0;
    background: transparent;
    padding: 0;
    color: var(--primary-strong);
    cursor: pointer;
    font-weight: 800;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.signup-submit {
    margin-top: 2px;
    min-height: 48px;
    border-radius: 15px;
}

.auth-footer-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 18px;
    color: var(--muted);
    font-size: 14px;
}

.auth-switch-box {
    display: grid;
    gap: 10px;
    margin-top: 18px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: color-mix(in srgb, var(--surface-soft) 54%, var(--surface));
    color: var(--muted);
    text-align: center;
    font-size: 14px;
    font-weight: 700;
}

.auth-switch-button {
    width: 100%;
    min-height: 42px;
    border-radius: 13px;
}

.form-error {
    color: var(--error);
    margin: 0;
}

.field-error {
    color: var(--error);
    margin: 0;
    font-size: 12px;
    font-weight: 700;
}

.form-help,
.text-link {
    color: var(--primary-strong);
}

.helper-text {
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.5;
}

.notice-box {
    padding: 13px 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: color-mix(in srgb, var(--surface-soft) 58%, var(--surface));
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
    line-height: 1.5;
}

.individual-lesson-notice {
    margin-top: -2px;
}

.weekday-field {
    gap: 10px;
}

.weekday-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 6px;
}

.weekday-chip {
    display: block;
    color: var(--text);
}

.weekday-chip input {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    opacity: 0;
    pointer-events: none;
}

.weekday-chip span {
    display: grid;
    place-items: center;
    min-height: 40px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--surface);
    font-size: 13px;
    font-weight: 900;
}

.weekday-chip input:checked + span {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 16%, var(--surface));
    color: var(--primary-strong);
}

.settings-card {
    gap: 14px;
}

.status-control-card {
    margin-top: 12px;
}

.status-select-row {
    grid-template-columns: minmax(88px, auto) minmax(0, 1fr);
    align-items: center;
}

.status-end-options {
    display: grid;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: color-mix(in srgb, var(--surface-soft) 58%, var(--surface));
}

.settings-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.schedule-builder {
    display: grid;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: color-mix(in srgb, var(--surface-soft) 42%, var(--surface));
}

.enrollment-panel:not(.is-active),
.enrollment-panel[hidden] {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
    overflow: hidden !important;
    pointer-events: none !important;
}

.schedule-builder-head h2,
.schedule-builder-head p {
    margin: 0;
}

.schedule-builder-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.schedule-builder-head p {
    margin-top: 4px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.5;
}

.schedule-row {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    padding: 6px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
    transition: border-color .16s ease, background .16s ease, box-shadow .16s ease;
}

.schedule-row.is-enabled {
    border-color: color-mix(in srgb, var(--primary) 58%, var(--line));
    background: color-mix(in srgb, var(--primary) 8%, var(--surface));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 18%, transparent);
}

.day-toggle {
    display: block;
    color: var(--text);
}

.day-toggle input {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    opacity: 0;
    pointer-events: none;
}

.day-toggle span {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 34px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface-soft);
    color: var(--muted);
    font-size: 14px;
    font-weight: 900;
}

.day-toggle input:checked + span {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.day-toggle input:checked + span::after {
    content: "선택";
    position: absolute;
    left: 50%;
    bottom: -16px;
    transform: translateX(-50%);
    color: var(--primary-strong);
    font-size: 10px;
    font-weight: 900;
    white-space: nowrap;
}

.schedule-time-fields {
    display: none;
    grid-template-columns: 1fr;
    gap: 6px;
    min-width: 0;
}

.schedule-row.is-enabled .schedule-time-fields {
    display: grid;
}

.schedule-time-fields .time-field {
    min-width: 0;
}

.schedule-time-fields .time-field input {
    width: 100%;
    min-width: 0;
    font-size: 15px;
    padding-left: 8px;
    padding-right: 6px;
}

.time-field {
    gap: 4px;
}

.time-field span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 900;
}

.time-field input,
.time-field select {
    min-height: 36px;
    border-radius: 13px;
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0;
}

.schedule-summary-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 8px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.schedule-summary-card strong {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 13px;
    background: var(--surface-soft);
    color: var(--primary-strong);
}

.individual-lesson-panel {
    gap: 14px;
}

.individual-lesson-list {
    display: grid;
    gap: 10px;
}

.individual-lesson-row {
    display: grid;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
}

.unavailable-form {
    display: grid;
    gap: 8px;
}

.unavailable-card {
    border-color: color-mix(in srgb, var(--error) 38%, var(--line));
}

.lesson-unavailable {
    border-color: color-mix(in srgb, var(--error) 46%, var(--line));
    background: color-mix(in srgb, var(--error) 8%, var(--surface));
}

.lesson-unavailable strong,
.lesson-unavailable a {
    color: var(--error);
}

@media (max-width: 430px) {
    .schedule-row {
        grid-template-columns: 44px minmax(0, 1fr);
        gap: 6px;
    }

    .two-col {
        grid-template-columns: 1fr;
    }

    .time-two-col {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .schedule-time-fields {
        gap: 4px;
    }

    .schedule-time-fields .time-field input {
        font-size: 14px;
        padding-left: 6px;
        padding-right: 4px;
    }
}

.terms-page {
    width: min(100%, 820px);
    margin: 0 auto;
    padding: 28px 16px 64px;
}

.terms-card {
    display: grid;
    gap: 20px;
    padding: 26px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.terms-head {
    display: grid;
    gap: 8px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
}

.terms-head p,
.terms-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.terms-card section {
    display: grid;
    gap: 8px;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 18px;
    background: rgba(11, 24, 36, .42);
    backdrop-filter: blur(8px);
}

.modal-backdrop.is-open {
    display: flex;
}

.modal-panel {
    width: min(100%, 520px);
    max-height: min(82vh, 720px);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: 0 24px 70px rgba(11, 24, 36, .24);
}

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 18px 12px;
    border-bottom: 1px solid var(--line);
}

.modal-head h2 {
    margin: 0;
    font-size: 19px;
    letter-spacing: -0.01em;
}

.modal-body {
    overflow: auto;
    padding: 18px;
}

.terms-content {
    display: grid;
    gap: 12px;
}

.terms-content h3,
.terms-content p {
    margin: 0;
}

.terms-content h3 {
    font-size: 15px;
}

.terms-content p {
    color: var(--muted);
    line-height: 1.65;
}

.modal-actions {
    padding: 12px 18px 18px;
    border-top: 1px solid var(--line);
}

.search-box {
    margin-bottom: 12px;
}

.students-list-page .filter-form {
    display: grid;
    gap: 10px;
    margin-bottom: 14px;
}

.students-list-page .search-box {
    margin-bottom: 0;
}

.students-list-page .filter-form select {
    min-height: 46px;
}

.students-list-page .student-card {
    margin-bottom: 12px;
    padding: 15px;
}

.student-lesson-detail-page .section-head {
    margin-bottom: 12px;
}

.student-lesson-detail-page .section-head h1 {
    font-size: 31px;
    letter-spacing: -0.02em;
}

.student-lesson-detail-page .lesson-hero {
    padding: 18px 16px;
    margin-bottom: 14px;
    background: linear-gradient(165deg, var(--surface), color-mix(in srgb, var(--surface-soft) 62%, var(--surface)));
}

.student-lesson-detail-page .lesson-hero-label {
    margin: 0 0 6px;
    color: var(--primary-strong);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .03em;
}

.student-lesson-detail-page .lesson-hero h1 {
    font-size: clamp(28px, 6.8vw, 38px);
    line-height: 1.08;
    margin-bottom: 2px;
}

.profile-card .lesson-name-title {
    font-size: 17px;
    line-height: 1.25;
    word-break: keep-all;
    overflow-wrap: anywhere;
}

.student-lesson-detail-page .lesson-name-title {
    font-size: clamp(26px, 6.1vw, 34px);
}

.parent-lesson-detail-page .lesson-hero .lesson-name-title {
    font-size: clamp(24px, 5.8vw, 32px);
}

.list-card .lesson-name-title {
    font-size: 14px;
}

.student-lesson-detail-page .lesson-time-card {
    padding: 13px 14px;
    margin-bottom: 10px;
}

.student-lesson-detail-page .lesson-time-card strong {
    width: 44px;
    height: 44px;
    font-size: 16px;
}

.student-lesson-detail-page .lesson-time-card span {
    font-size: clamp(20px, 5.6vw, 24px);
    font-weight: 800;
    letter-spacing: -0.01em;
}

.student-lesson-detail-page .quick-actions {
    margin-top: 12px;
}

.student-lesson-detail-page .quick-actions .soft-button {
    min-height: 46px;
    font-weight: 900;
}

.two-col,
.inline-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px;
}

.time-two-col {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.inline-form {
    grid-template-columns: minmax(96px, 1fr) auto;
    align-items: center;
}

@media (max-width: 430px) {
    .two-col {
        grid-template-columns: 1fr;
    }

    .time-two-col {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }
}

.lesson-quick-edit-form {
    margin-top: -2px;
    margin-bottom: 12px;
    padding: 14px;
}

.lesson-quick-time-grid {
    display: grid;
    gap: 8px;
}

.lesson-quick-time-row {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 6px;
    padding: 6px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-soft);
}

.lesson-quick-time-row.lesson-quick-time-row-individual {
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
    gap: 8px;
    padding: 10px;
}

.lesson-quick-time-row strong {
    color: var(--primary-strong);
    font-size: 14px;
    text-align: center;
}

.lesson-quick-time-row > .time-field {
    min-width: 0;
}

.lesson-quick-time-selects {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    min-width: 0;
}

.lesson-quick-time-selects select {
    min-height: 36px;
    min-width: 0;
    padding: 6px 8px;
    font-size: 13px;
}

.lesson-quick-time-row .time-field input,
.lesson-quick-time-row .time-field select {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    text-align: center;
}

.lesson-quick-time-row .time-readonly {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text);
    font-weight: 800;
}

.lesson-quick-session-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.lesson-quick-session-head strong {
    text-align: left;
}

.lesson-quick-session-head span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}

.lesson-quick-session-fields {
    display: grid;
    gap: 6px;
}

.lesson-quick-session-time-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px;
    align-items: end;
}

.lesson-quick-session-time-grid .time-field {
    min-width: 0;
}

.lesson-quick-session-time-grid .time-field input {
    width: 100%;
    min-width: 0;
    font-size: 15px;
    letter-spacing: -0.01em;
    padding-left: 10px;
    padding-right: 8px;
}

@media (max-width: 520px) {
    .lesson-quick-time-row:not(.lesson-quick-time-row-individual) {
        grid-template-columns: 30px minmax(0, 1fr);
        align-items: start;
        gap: 6px;
    }

    .lesson-quick-time-row:not(.lesson-quick-time-row-individual) > strong {
        grid-column: 1;
        grid-row: 1 / span 2;
        align-self: center;
    }

    .lesson-quick-time-row:not(.lesson-quick-time-row-individual) > .time-field:nth-of-type(1) {
        grid-column: 2;
        grid-row: 1;
    }

    .lesson-quick-time-row:not(.lesson-quick-time-row-individual) > .time-field:nth-of-type(2) {
        grid-column: 2;
        grid-row: 2;
    }

    .lesson-quick-time-row.lesson-quick-time-row-individual {
        grid-template-columns: minmax(0, 1fr);
    }

    .lesson-quick-session-time-grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 8px;
    }
}

.lesson-quick-save {
    width: 100%;
}

.lesson-add-session-form {
    display: grid;
    gap: 8px;
    margin-bottom: 12px;
    padding: 12px;
}

.lesson-add-session-submit {
    width: 100%;
}

.homework-prefill-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    min-width: 72px;
    padding: 6px 10px;
    font-size: 12px;
    line-height: 1;
    white-space: nowrap;
}

.homework-prefill-button-create {
    background: color-mix(in srgb, var(--success) 18%, var(--surface));
    color: color-mix(in srgb, var(--success) 72%, var(--text));
    border: 1px solid color-mix(in srgb, var(--success) 42%, var(--line));
}

.homework-prefill-button-update {
    background: color-mix(in srgb, var(--primary) 16%, var(--surface));
    color: var(--primary-strong);
    border: 1px solid color-mix(in srgb, var(--primary) 40%, var(--line));
}

.calendar-strip,
.empty-state {
    padding: 16px;
    margin-bottom: 12px;
}

.empty-state {
    color: var(--muted);
    font-size: 15px;
    font-weight: 800;
    line-height: 1.4;
}

.calendar-strip span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 13px;
}

.calendar-month-nav {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 8px;
}

.calendar-month-nav strong {
    text-align: center;
}

.calendar-view-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 12px;
}

.calendar-view-switch .soft-button {
    min-height: 40px;
}

.calendar-view-switch .soft-button.is-active {
    background: var(--primary);
    color: #fff;
}

.calendar-load-more {
    display: flex;
    justify-content: center;
    margin: 16px 0 4px;
}

.calendar-load-more-button {
    width: min(100%, 260px);
    min-height: 48px;
    font-size: 15px;
    font-weight: 900;
}

.list-card.lesson-card form {
    margin: 0;
}

.list-card.lesson-card .badge,
.list-card.lesson-card .soft-button.compact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 28px;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
    line-height: 1;
    white-space: nowrap;
}

.lesson-entry-time {
    display: block;
    margin: 0;
    color: var(--text);
    font-size: 17px;
    font-weight: 900;
    letter-spacing: -0.02em;
}

.lesson-entry-title {
    margin: 4px 0 0;
    color: var(--text);
    font-size: 15px;
    font-weight: 800;
    line-height: 1.25;
}

.lesson-entry-title a {
    color: inherit;
}

.lesson-entry-attendees {
    margin: 2px 0 0;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.35;
}

.list-card.lesson-card.is-today-lesson {
    border-color: color-mix(in srgb, var(--warning) 62%, var(--line));
    background: color-mix(in srgb, var(--warning) 9%, var(--surface));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--warning) 26%, transparent), var(--shadow);
}

.lesson-group-tree {
    margin-bottom: 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.lesson-group-tree > summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px;
    cursor: pointer;
}

.lesson-group-tree > summary::-webkit-details-marker {
    display: none;
}

.lesson-group-tree > summary p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.lesson-group-tree[open] > summary {
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface-soft) 60%, var(--surface));
}

.lesson-group-tree-body {
    display: grid;
    gap: 10px;
    padding: 12px;
}

.notifications-load-more {
    display: flex;
    justify-content: center;
    margin: 16px 0 4px;
}

.notifications-load-more-button {
    width: min(100%, 260px);
    min-height: 48px;
    font-size: 15px;
    font-weight: 900;
}

.month-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 6px;
    width: 100%;
    min-width: 0;
}

.month-grid-wrap {
    overflow-x: auto;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
}

.month-grid-head {
    padding: 8px 4px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
    text-align: center;
}

.month-grid > .month-grid-head:nth-child(-n+5) {
    color: var(--text);
}

.month-grid > .month-grid-head:nth-child(6) {
    color: var(--primary-strong);
}

.month-grid > .month-grid-head:nth-child(7) {
    color: var(--error);
}

.month-grid-cell {
    position: relative;
    width: 100%;
    min-width: 0;
    min-height: 96px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    color: inherit;
    font: inherit;
    text-align: left;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    overflow: hidden;
}

.month-grid-cell.has-items {
    border-color: color-mix(in srgb, var(--primary) 52%, var(--line));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 24%, transparent);
}

.month-grid-cell.is-selected {
    border-color: color-mix(in srgb, var(--primary) 85%, var(--line));
    box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--primary) 48%, transparent);
}

.month-grid-cell.is-selected.is-unavailable-day {
    border-color: color-mix(in srgb, var(--error) 82%, var(--line));
    box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--error) 34%, transparent);
}

.month-grid-cell.is-today:not(.is-unavailable-day) {
    border-color: color-mix(in srgb, var(--warning) 68%, var(--line));
    background: color-mix(in srgb, var(--warning) 10%, var(--surface));
}

.month-grid-cell.is-today:not(.is-unavailable-day) > header strong {
    color: var(--warning);
    font-weight: 900;
}

.month-grid-cell:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--primary) 70%, white);
    outline-offset: 1px;
}

.month-grid-cell.is-outside {
    opacity: .5;
}

.month-grid-cell > header {
    margin: 0;
}

.month-grid-cell > header strong {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 3;
    font-size: 13px;
    color: var(--text);
    line-height: 1;
}

.month-grid > .month-grid-cell:nth-of-type(7n+6):not(.is-unavailable-day) > header strong {
    color: var(--primary-strong);
}

.month-grid > .month-grid-cell:nth-of-type(7n):not(.is-unavailable-day) > header strong {
    color: var(--error);
}

.month-grid-cell > header .badge.info {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    min-width: 32px;
    padding: 3px 7px;
    text-align: center;
    pointer-events: none;
}

.month-grid-cell > header .badge.error,
.month-grid-cell > header .badge.warning {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 3;
    pointer-events: none;
}

.month-grid-items {
    display: grid;
    gap: 4px;
    margin-top: 24px;
}

.month-grid-items p {
    margin: 0;
    padding: 3px 6px;
    border-radius: 8px;
    background: var(--surface-soft);
    color: var(--text);
    font-size: 11px;
    font-weight: 700;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.month-grid-items p.is-unavailable {
    background: color-mix(in srgb, var(--error) 14%, var(--surface));
    color: var(--error);
}

.month-grid-cell.is-unavailable-day {
    border-color: color-mix(in srgb, var(--error) 74%, var(--line));
    background: color-mix(in srgb, var(--error) 13%, var(--surface));
}

.month-grid-cell.is-unavailable-day > header strong {
    color: var(--error);
}

.month-grid-cell.is-unavailable-day > header .badge.warning,
.month-grid-cell.is-unavailable-day > header .badge.error {
    font-size: 10px;
    padding: 2px 6px;
    background: color-mix(in srgb, var(--error) 20%, transparent);
    color: var(--error);
}

.calendar-hover-modal {
    position: fixed;
    z-index: 60;
    inset: 0;
    display: grid;
    align-items: start;
    justify-items: start;
    pointer-events: none;
}

.calendar-hover-modal[hidden] {
    display: none !important;
}

.calendar-hover-modal-panel {
    max-width: min(92vw, 340px);
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    box-shadow: 0 16px 48px rgba(10, 20, 30, .2);
}

.calendar-hover-modal h3 {
    margin: 0 0 8px;
    font-size: 14px;
}

.calendar-hover-modal ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 8px;
}

.calendar-hover-modal li {
    display: grid;
    gap: 2px;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: color-mix(in srgb, var(--surface-soft) 60%, var(--surface));
}

.calendar-hover-modal li:last-child {
    margin-bottom: 0;
}

.calendar-hover-modal li.is-unavailable {
    border-color: color-mix(in srgb, var(--error) 58%, var(--line));
    background: color-mix(in srgb, var(--error) 10%, var(--surface));
}

.calendar-hover-modal li.is-link {
    cursor: pointer;
}

.calendar-hover-modal li.is-link:hover,
.calendar-hover-modal li.is-link:focus-visible {
    border-color: color-mix(in srgb, var(--primary) 62%, var(--line));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 30%, transparent);
    outline: none;
}

.calendar-hover-modal li strong {
    font-size: 14px;
    color: var(--text);
}

.calendar-hover-modal li .lesson-entry-time {
    font-size: 14px;
}

.calendar-hover-modal li .lesson-entry-title {
    margin-top: 3px;
    font-size: 13px;
    font-weight: 800;
}

.calendar-hover-modal li .lesson-entry-attendees {
    margin-top: 1px;
    font-size: 12px;
}

.calendar-hover-modal li.is-unavailable strong,
.calendar-hover-modal li.is-unavailable .lesson-entry-title,
.calendar-hover-modal li.is-unavailable .lesson-entry-attendees {
    color: var(--error);
}

.calendar-hover-modal li em {
    color: var(--error);
    font-style: normal;
    font-size: 12px;
    font-weight: 800;
}

.calendar-selected-section {
    margin-top: 14px;
}

.calendar-selected-list {
    display: grid;
    gap: 10px;
}

.calendar-selected-list .calendar-hover-modal-panel {
    max-width: 100%;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.calendar-selected-list .calendar-hover-modal-panel ul {
    gap: 10px;
}

.calendar-selected-list .calendar-hover-modal-panel li {
    gap: 4px;
    padding: 12px 14px;
    border: 1px solid color-mix(in srgb, var(--primary) 28%, var(--line));
    border-radius: 14px;
    background: var(--surface);
}

.calendar-selected-list .calendar-hover-modal-panel li strong {
    color: var(--text);
    font-size: 14px;
    font-weight: 900;
}

.calendar-selected-list .calendar-hover-modal-panel li .lesson-entry-time {
    font-size: 16px;
}

.calendar-selected-list .calendar-hover-modal-panel li .lesson-entry-title {
    margin-top: 3px;
    font-size: 14px;
}

.calendar-selected-list .calendar-hover-modal-panel li .lesson-entry-attendees {
    margin-top: 1px;
    font-size: 12px;
}

@media (max-width: 900px) {
    .month-grid-items {
        display: none;
    }
}

@media (max-width: 760px) {
    .month-grid {
        gap: 4px;
    }

    .month-grid-head {
        padding: 6px 2px;
        font-size: 11px;
    }

    .month-grid-cell {
        min-height: 86px;
        padding: 6px;
        border-radius: 10px;
    }

    .month-grid-cell > header strong {
        top: 6px;
        left: 6px;
        font-size: 12px;
    }

    .month-grid-cell > header .badge.error,
    .month-grid-cell > header .badge.warning {
        top: 6px;
        right: 6px;
    }

    .month-grid-cell > header .badge {
        padding: 2px 6px;
        font-size: 10px;
        line-height: 1.1;
    }

}

.sticky-action {
    position: sticky;
    bottom: 82px;
}

.lesson-form-card {
    padding-bottom: 104px;
}

.lesson-form-card .sticky-action {
    margin-top: 8px;
}

.student-form-card {
    padding-bottom: 104px;
}

.student-sticky-action-slot {
    position: sticky;
    bottom: 82px;
    z-index: 2;
    padding-top: 12px;
    background: linear-gradient(to bottom, transparent 0%, var(--surface) 60%);
}

.student-form-card .student-form-save.sticky-action {
    position: static;
    bottom: auto;
    margin-top: 0;
}

.lesson-form-card #regularDateRangePanel {
    padding: 12px;
    gap: 10px;
}

.lesson-form-card #regularDateRangePanel .helper-text {
    line-height: 1.35;
}

.lesson-form-card #regularDateRangePanel input[type="date"] {
    min-height: 40px;
    padding-top: 8px;
    padding-bottom: 8px;
}

.toast {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: 24px;
    z-index: 20;
    max-width: 420px;
    margin: 0 auto;
    padding: 12px 14px;
    border-radius: 14px;
    background: var(--text);
    color: var(--surface);
    text-align: center;
    box-shadow: var(--shadow);
}

.bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 15;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.bottom-nav a {
    display: grid;
    place-items: center;
    min-height: 44px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.bottom-nav a.active {
    background: var(--surface-soft);
    color: var(--primary-strong);
}

@media (min-width: 760px) {
    .metric-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .bottom-nav {
        width: min(100%, 980px);
        margin: 0 auto;
        border: 1px solid var(--line);
        border-bottom: 0;
        border-radius: 24px 24px 0 0;
    }
}

.member-other-lessons {
    white-space: pre-line;
}

.page-shell {
    min-height: 100vh;
    background: var(--bg);
    padding: 24px 16px 40px;
}

.page-content {
    width: min(100%, 980px);
    margin: 0 auto;
}

.page-card {
    display: grid;
    gap: 14px;
    padding: 22px 20px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.invite-url {
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.35;
    word-break: break-all;
}

.page-header {
    display: grid;
    gap: 6px;
}

.table-scroll {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    min-width: 720px;
}

.data-table thead th {
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 12px;
    font-weight: 900;
    text-align: left;
}

.data-table tbody td {
    padding: 12px;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
    vertical-align: middle;
}

.data-table tbody tr:last-child td {
    border-bottom: 0;
}

.data-table .actions-cell {
    text-align: right;
}

.approve-button {
    white-space: nowrap;
}

@media (max-width: 760px) {
    .page-shell {
        padding: 14px 10px 26px;
    }

    .page-card {
        padding: 18px 14px;
        border-radius: 16px;
    }

    .table-scroll {
        overflow: visible;
    }

    .data-table {
        min-width: 0;
        border-spacing: 0;
    }

    .data-table thead {
        display: none;
    }

    .data-table tbody {
        display: grid;
        gap: 10px;
    }

    .data-table tbody tr {
        display: grid;
        gap: 8px;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 14px;
        background: color-mix(in srgb, var(--surface-soft) 30%, var(--surface));
    }

    .data-table tbody td {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        padding: 0;
        border-bottom: 0;
    }

    .data-table tbody td::before {
        content: attr(data-label);
        color: var(--muted);
        font-size: 12px;
        font-weight: 800;
        flex: 0 0 auto;
    }

    .data-table .actions-cell {
        justify-content: flex-end;
        margin-top: 2px;
    }

.data-table .actions-cell::before {
        content: none;
    }
}

#pushPromptModal .modal-panel {
    width: min(100%, 420px);
    display: grid;
    grid-template-rows: auto auto;
    gap: 12px;
    padding: 18px;
}

#pushPromptModal .modal-panel h2 {
    margin: 0;
}

.button-inline {
    display: inline-flex;
    gap: 8px;
    flex-wrap: wrap;
}

.quick-line-box {
    display: grid;
    gap: 10px;
}

.quick-line-list {
    display: grid;
    gap: 10px;
}

.quick-line-row {
    display: grid;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface-soft);
}

.quick-line-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.quick-line-number {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 10px;
    background: var(--surface);
    color: var(--primary-strong);
    font-size: 13px;
}

.quick-mention-help {
    margin-top: 0;
}

.quick-mention-help h2 {
    margin: 0;
}

.quick-mention-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.quick-mention-suggest {
    display: grid;
    gap: 4px;
    padding: 6px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
}

.quick-suggest-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    min-height: 36px;
    border: 0;
    border-radius: 10px;
    background: var(--surface-soft);
    color: var(--text);
    padding: 8px 10px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}

.quick-suggest-item small {
    color: var(--muted);
}

.quick-status-actions {
    display: grid;
    gap: 6px;
    justify-items: end;
}

.quick-inline-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 6px;
    align-items: center;
}

.quick-inline-form input {
    min-height: 36px;
}

.quick-board-wrap {
    display: grid;
    gap: 10px;
}

.quick-board-actions {
    display: flex;
    justify-content: flex-end;
}

.quick-board-actions .button-inline {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
    gap: 8px;
}

.quick-board-actions form {
    margin: 0;
}

.quick-student-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.quick-student-tab {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--primary-strong);
    text-decoration: none;
    white-space: nowrap;
    font-weight: 700;
    font-size: 13px;
}

.quick-student-tab.active {
    background: #3d6dbc;
    border-color: #3d6dbc;
    color: #fff;
}

.quick-homework-board {
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    background: var(--surface);
    color: var(--text);
}

.quick-homework-board-head {
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--primary) 14%, var(--surface-soft));
    font-size: 24px;
    font-weight: 800;
    text-align: center;
    letter-spacing: 0.02em;
    color: var(--primary-strong);
}

.status-head-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.homeworks-status-title {
    font-size: 21px;
}

.quick-homework-board-body {
    display: grid;
    gap: 0;
}

.quick-homework-board-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 26px;
    align-items: center;
    gap: 14px;
    padding: 14px;
    border-top: 1px solid var(--line);
}

.quick-homework-board-row:first-child {
    border-top: 0;
}

.quick-homework-board-row--summary {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
}

.quick-homework-board-content strong {
    display: block;
    font-size: 22px;
    line-height: 1.4;
    word-break: keep-all;
    color: var(--primary-strong);
}

.quick-homework-board-content .helper-text {
    margin-top: 4px;
    color: var(--muted);
}

.quick-homework-item-list {
    margin: 10px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.quick-homework-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 34px;
    align-items: start;
    gap: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--line);
}

.quick-homework-item:first-child {
    padding-top: 0;
    border-top: 0;
}

.quick-homework-item-title {
    margin: 0;
    font-size: 18px;
    font-weight: 800;
    line-height: 1.45;
    color: var(--primary-strong);
    word-break: break-word;
}

.quick-check-icon {
    width: 26px;
    height: 26px;
    border: 2px solid var(--line);
    background: var(--surface-soft);
    border-radius: 3px;
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 12%, transparent);
}

.quick-check-icon.checked {
    background: color-mix(in srgb, var(--primary) 20%, white);
    position: relative;
}

.quick-check-icon.checked::after {
    content: "";
    position: absolute;
    left: 6px;
    top: 1px;
    width: 8px;
    height: 14px;
    border-right: 3px solid var(--primary-strong);
    border-bottom: 3px solid var(--primary-strong);
    transform: rotate(42deg);
}

.quick-student-check-actions {
    display: grid;
    gap: 8px;
    justify-items: end;
}

.quick-checkbox-form {
    margin: 0;
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    justify-self: end;
    align-self: center;
}

.quick-checkbox-inline {
    align-self: start;
    justify-self: end;
}

.quick-item-checkbox {
    width: 26px;
    height: 26px;
    margin: 0;
    appearance: none;
    -webkit-appearance: none;
    border: 2px solid var(--line);
    border-radius: 3px;
    background: var(--surface-soft);
    cursor: pointer;
    position: relative;
}

.quick-item-checkbox:checked {
    background: color-mix(in srgb, var(--primary) 20%, var(--surface));
    border-color: color-mix(in srgb, var(--primary) 55%, var(--line));
}

.quick-item-checkbox:checked::after {
    content: "";
    position: absolute;
    left: 6px;
    top: 1px;
    width: 8px;
    height: 14px;
    border-right: 3px solid var(--primary-strong);
    border-bottom: 3px solid var(--primary-strong);
    transform: rotate(42deg);
}

.quick-item-checkbox:disabled {
    cursor: default;
    opacity: 0.92;
}

.homework-review-list {
    display: grid;
    gap: 10px;
}

.homework-review-card {
    margin-top: 0;
    padding: 12px;
}

.homework-review-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}

.homework-review-head strong {
    font-size: 15px;
    line-height: 1.4;
    color: var(--primary-strong);
}

.homework-review-form {
    gap: 8px;
}

@media (max-width: 640px) {
    .quick-homework-board-head {
        font-size: 19px;
        padding: 10px 12px;
    }

    .quick-homework-board-row {
        padding: 12px;
    }

    .quick-homework-board-content strong {
        font-size: 17px;
    }

    .quick-homework-item-title {
        font-size: 16px;
    }
}

.print-page .print-sheet {
    margin-bottom: 16px;
}