.app-main {
    min-height: calc(100vh - 132px);
}

.app-section {
    width: min(100%, var(--content-max-width));
    margin: 48px auto 72px;
}

.app-narrow {
    width: min(100%, 520px);
}

.app-readable {
    width: min(100%, 820px);
}

.app-panel {
    padding: 32px;
}

.app-panel h1,
.section-heading h1 {
    margin-bottom: 16px;
}

.app-panel h2,
.homework-card h2 {
    margin: 0 0 12px;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 22px;
    line-height: 1.25;
}

.section-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 28px;
}

.app-form {
    display: grid;
    gap: 12px;
    margin-top: 24px;
}

.app-form label {
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
}

.app-form input,
.app-form textarea,
.app-form select {
    width: 100%;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 12px 14px;
    background: #fff;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 16px;
}

.app-form input[type="checkbox"] {
    width: auto;
    justify-self: start;
}

.app-form ul,
.errorlist {
    margin: 0 0 8px 18px;
    color: #B84242;
    font-family: Montserrat, sans-serif;
    font-size: 13px;
}

.field-help,
.form-footer {
    color: #707070;
    font-size: 13px;
}

.primary-button,
.text-button,
.inline-logout button {
    border: 0;
    cursor: pointer;
    font-family: Montserrat, sans-serif;
    font-weight: 700;
    text-transform: uppercase;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    min-height: 48px;
    padding: 14px 24px;
    border-radius: 20px;
    background: #4D4D4D;
    color: #fff;
    font-size: 14px;
}

.text-link,
.text-button {
    color: #4D4D4D;
    text-decoration: underline;
    text-underline-offset: 4px;
    font-family: Montserrat, sans-serif;
    font-weight: 700;
}

.text-button:disabled {
    cursor: not-allowed;
    color: #aaa;
}

.student-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-end;
}

.chat-list {
    display: grid;
    gap: 12px;
    margin-top: 24px;
    padding: 24px;
}

.chat-list h2 {
    margin: 0;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
}

.chat-list-item {
    display: grid;
    gap: 6px;
    padding: 12px;
    border: 1px solid rgba(77, 77, 77, 0.12);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.6);
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
}

.chat-list-item p {
    margin: 0;
}

.chat-list-item span,
.chat-message span {
    color: #707070;
    font-size: 12px;
}

.chat-messages {
    display: grid;
    gap: 12px;
    margin: 24px 0;
}

.chat-message {
    width: min(100%, 620px);
    padding: 12px 14px;
    border: 1px solid rgba(77, 77, 77, 0.12);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
}

.chat-message.from-self {
    justify-self: end;
    background: rgba(227, 242, 253, 0.9);
}

.chat-message.from-peer {
    justify-self: start;
}

.chat-message p {
    margin: 0 0 8px;
}

.text-button {
    padding: 0;
    background: transparent;
    font-size: 14px;
}

.inline-logout {
    display: inline;
}

.inline-logout button {
    padding: 0;
    background: transparent;
    color: #4D4D4D;
    font-size: 16px;
    line-height: 24px;
}

.news-feed {
    display: grid;
    gap: 22px;
}

.news-card {
    display: grid;
    gap: 14px;
    padding: 24px;
}

.news-card h2 {
    margin: 0;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
}

.news-meta,
.news-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    color: #707070;
    font-family: Montserrat, sans-serif;
    font-size: 13px;
}

.news-image {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: 8px;
}

.news-body {
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    line-height: 1.6;
}

.news-body p,
.news-body h1,
.news-body h2,
.news-body h3 {
    margin: 0 0 12px;
}

.news-body a {
    color: #4D4D4D;
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 700;
}

.message-stack {
    width: min(100%, var(--content-max-width));
    margin: 24px auto 0;
}

.message {
    padding: 12px 16px;
    border-radius: 8px;
    background: #eef8ef;
    color: #356b39;
}

.message.error {
    background: #fdecec;
    color: #9b3030;
}

.homework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.homework-card {
    padding: 28px;
    min-height: 240px;
}

.date-label {
    margin-bottom: 10px;
    color: #909090;
    font-weight: 700;
}

.homework-text {
    margin-top: 20px;
}

.material-image {
    margin-top: 28px;
}

.material-image img {
    width: 100%;
    border-radius: 8px;
}

.material-gallery {
    display: grid;
    gap: 18px;
    margin-top: 28px;
}

.material-gallery .material-image {
    margin-top: 0;
}

.audio-materials,
.existing-audio {
    display: grid;
    gap: 14px;
    margin-top: 28px;
}

.audio-player,
.audio-manage-item {
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid rgba(77, 77, 77, 0.12);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.55);
}

.audio-player p,
.audio-manage-item span {
    margin: 0;
    font-family: Montserrat, sans-serif;
    font-size: 14px;
    font-weight: 700;
}

.audio-player audio,
.audio-manage-item audio {
    width: 100%;
}

.audio-manage-list {
    display: grid;
    gap: 12px;
}

.server-audio-picker {
    border: 1px solid rgba(77, 77, 77, 0.14);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.55);
}

.server-audio-picker summary {
    cursor: pointer;
    padding: 12px 14px;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-weight: 700;
}

.server-audio-options {
    max-height: 260px;
    overflow: auto;
    border-top: 1px solid rgba(77, 77, 77, 0.12);
    padding: 10px 14px;
}

.server-audio-options ul {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.server-audio-options label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 0;
    text-transform: none;
    line-height: 1.35;
}

.existing-images {
    margin-top: 12px;
}

.image-manage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-top: 14px;
}

.image-manage-item {
    display: grid;
    gap: 10px;
    padding: 12px;
    border: 1px solid rgba(77, 77, 77, 0.12);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.55);
    text-transform: none;
}

.image-manage-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 6px;
}

.image-manage-item span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 13px;
    font-weight: 700;
}

.table-wrap {
    overflow-x: auto;
    padding: 8px;
}

.homework-table {
    width: 100%;
    border-collapse: collapse;
    font-family: Montserrat, sans-serif;
}

.homework-table th,
.homework-table td {
    padding: 16px;
    border-bottom: 1px solid rgba(77, 77, 77, 0.12);
    text-align: left;
    vertical-align: top;
}

.homework-table th {
    color: #707070;
    font-size: 13px;
    text-transform: uppercase;
}

.status {
    display: inline-block;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 700;
}

.status.published {
    background: #e7f6ec;
    color: #2d6b3f;
}

.status.draft {
    background: #f2f2f2;
    color: #6a6a6a;
}

.assignment-summary {
    color: #707070;
    font-family: Montserrat, sans-serif;
    font-size: 13px;
    font-weight: 700;
}

.actions-cell {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.back-link {
    display: inline-block;
    margin-bottom: 18px;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 28px;
    font-family: Montserrat, sans-serif;
}

.calendar-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
    font-family: Montserrat, sans-serif;
}

.calendar-toolbar h2 {
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 24px;
    text-transform: capitalize;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    overflow: hidden;
}

.calendar-weekday,
.calendar-day {
    min-width: 0;
    border-right: 1px solid rgba(77, 77, 77, 0.1);
    border-bottom: 1px solid rgba(77, 77, 77, 0.1);
}

.calendar-weekday {
    padding: 12px;
    color: #707070;
    font-family: Montserrat, sans-serif;
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    text-transform: uppercase;
}

.calendar-day {
    min-height: 156px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.35);
}

.calendar-day.is-empty {
    background: rgba(255, 255, 255, 0.12);
}

.calendar-day.is-today {
    background: rgba(231, 246, 236, 0.72);
}

.calendar-date {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-weight: 700;
}

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

.calendar-add-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: #E8E8EC;
    color: #6A6A6A;
    font-family: Montserrat, sans-serif;
    font-size: 18px;
    font-weight: 700;
    line-height: 1;
    box-shadow: inset 0 0 0 1px rgba(77, 77, 77, 0.08);
}

.calendar-add-button:hover {
    background: #DCDCE2;
    color: #4D4D4D;
}

.lesson-stack {
    display: grid;
    gap: 8px;
    margin-top: 8px;
}

.lesson-pill {
    display: grid;
    gap: 2px;
    padding: 8px;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 4px 12px rgba(174, 174, 192, 0.18);
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 12px;
    line-height: 1.35;
}

.lesson-pill strong,
.lesson-pill em {
    font-style: normal;
    font-weight: 700;
}

.lesson-pill a {
    margin-top: 4px;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.lesson-attendee-list {
    display: grid;
    gap: 4px;
    margin-top: 4px;
}

.lesson-attendee-row {
    display: block;
    padding: 4px 6px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: #f7f7f7;
}

.lesson-attendee-row.status-conducted-paid {
    border-color: rgba(46, 125, 50, 0.26);
    background: rgba(232, 245, 233, 0.88);
    color: #2e7d32;
}

.lesson-attendee-row.status-cancelled-paid {
    border-color: rgba(25, 118, 210, 0.24);
    background: rgba(227, 242, 253, 0.9);
    color: #1565c0;
}

.lesson-attendee-row.status-cancelled-refunded {
    border-color: rgba(251, 140, 0, 0.26);
    background: rgba(255, 248, 225, 0.95);
    color: #ef6c00;
}

.lesson-attendee-row.status-not-conducted-yet {
    border-color: rgba(117, 117, 117, 0.24);
    background: rgba(245, 245, 245, 0.95);
    color: #616161;
}

.lesson-attendee-row.status-not-specified {
    border-color: rgba(123, 31, 162, 0.22);
    background: rgba(243, 229, 245, 0.75);
    color: #6a1b9a;
}

.lesson-attendee-row span {
    min-width: 0;
    overflow-wrap: anywhere;
}

.student-status-panel {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.student-status-panel h2 {
    color: #4D4D4D;
    font-family: Montserrat, sans-serif;
    font-size: 18px;
}

.student-status-row {
    display: grid;
    grid-template-columns: minmax(140px, 1fr) minmax(180px, 1fr) 120px;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid rgba(77, 77, 77, 0.12);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.55);
    text-transform: none;
}

.student-status-row[hidden] {
    display: none;
}

.student-status-row span {
    font-family: Montserrat, sans-serif;
    font-weight: 700;
}

.no-lessons {
    color: #aaa;
    font-family: Montserrat, sans-serif;
    font-size: 12px;
}

@media (max-width: 720px) {
    .section-heading {
        display: block;
    }

    .section-heading .primary-button {
        margin-top: 16px;
    }

    .app-panel {
        padding: 24px;
    }

    .calendar-grid {
        display: block;
    }

    .calendar-weekday,
    .calendar-day.is-empty {
        display: none;
    }

    .calendar-day {
        min-height: auto;
        border-right: 0;
    }

    .student-status-row {
        grid-template-columns: 1fr;
    }
}