* {
    box-sizing: border-box;
}

/* Реестр собственных отсутствий преподавателя */
.teacher-absence-panel {
    margin-bottom: 1.25rem;
    padding: 1.25rem;
    border: 1px solid color-mix(in srgb, #f59e0b 28%, var(--border));
    border-radius: 18px;
    background: linear-gradient(125deg, color-mix(in srgb, #f59e0b 9%, transparent), transparent 52%), var(--card);
}

.teacher-absence-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.teacher-absence-heading span {
    color: #d97706;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.teacher-absence-heading h2 {
    margin: 0.25rem 0;
    font-size: 1.2rem;
}

.teacher-absence-heading p {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.5;
}

.teacher-absence-form {
    display: grid;
    grid-template-columns: 170px 170px minmax(260px, 1fr) auto;
    gap: 0.75rem;
    align-items: end;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.teacher-absence-form[hidden] {
    display: none;
}

.teacher-absence-form label {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 700;
}

.teacher-absence-form input {
    min-height: 42px;
    padding: 0 0.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card);
    color: var(--text);
    font: inherit;
}

.teacher-absence-status {
    min-height: 1.2rem;
    margin-top: 0.7rem;
    font-size: 0.8rem;
}

.teacher-absence-status.error { color: #ef4444; }
.teacher-absence-status.success { color: #10b981; }

.teacher-absence-list {
    display: grid;
    gap: 0.55rem;
    margin-top: 0.35rem;
}

.teacher-absence-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    gap: 0.7rem;
    align-items: center;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: color-mix(in srgb, var(--card) 82%, transparent);
}

.teacher-absence-item p {
    margin: 0.2rem 0 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.teacher-absence-marker {
    width: 8px;
    height: 38px;
    border-radius: 999px;
    background: #94a3b8;
}

.teacher-absence-marker.is-pending { background: #f59e0b; }
.teacher-absence-marker.is-approved { background: #fb7185; }
.teacher-absence-marker.is-resolved { background: #10b981; }

.teacher-absence-badge {
    padding: 0.3rem 0.6rem;
    border: 1px solid currentColor;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 800;
    white-space: nowrap;
}

.teacher-absence-badge.is-pending { color: #d97706; }
.teacher-absence-badge.is-approved { color: #e11d48; }
.teacher-absence-badge.is-resolved { color: #059669; }

.teacher-absence-empty {
    padding: 0.75rem;
    color: var(--muted);
    text-align: center;
    font-size: 0.82rem;
}

.teacher-absence-empty.error { color: #ef4444; }

@media (max-width: 900px) {
    .teacher-absence-form {
        grid-template-columns: 1fr 1fr;
    }

    .teacher-absence-reason {
        grid-column: 1 / -1;
    }
}

@media (max-width: 640px) {
    .teacher-absence-heading,
    .teacher-absence-form {
        grid-template-columns: 1fr;
    }

    .teacher-absence-heading {
        align-items: stretch;
        flex-direction: column;
    }

    .teacher-absence-reason {
        grid-column: auto;
    }

    .teacher-absence-item {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .teacher-absence-badge,
    .teacher-absence-item button {
        grid-column: 2;
        justify-self: start;
    }
}

:root {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --panel-border: #d8dee8;
    --text: #172033;
    --muted: #67758d;
    --accent: #4F46E5;
    --accent-strong: #4338CA;
    --green: #047857;
    --orange: #b45309;
    --shadow: 0 12px 30px rgba(23, 32, 51, 0.08);
    --card: var(--panel);
    --border: var(--panel-border);
}

[data-theme="dark"] {
    --bg: #10151f;
    --panel: #171f2e;
    --panel-border: #2a374b;
    --text: #eef4fb;
    --muted: #a2b0c5;
    --accent: #8B5CF6;
    --accent-strong: #7C3AED;
    --green: #34d399;
    --orange: #f59e0b;
    --shadow: 0 18px 42px rgba(0, 0, 0, 0.28);
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: var(--ui-font-sans, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
}

.shell {
    max-width: 1240px;
    margin: 0 auto;
    padding: 24px;
}

.topbar,
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.topbar {
    margin-bottom: 18px;
}

.title h1 {
    margin: 0 0 4px;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0;
}

.title span {
    color: var(--muted);
    font-size: 14px;
}

.toolbar {
    margin-bottom: 16px;
    padding: 14px;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.actions,
.week-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn,
.date-input {
    min-height: 40px;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    font: inherit;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    padding: 0 14px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
    border-color: var(--accent);
    color: var(--accent-strong);
}

.btn-primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-strong);
    color: #fff;
}

.btn-secondary {
    background: var(--panel);
    border-color: var(--panel-border);
    color: var(--text);
}

.btn-secondary:hover {
    background: color-mix(in srgb, var(--accent) 7%, var(--panel));
}

.btn-danger-subtle {
    background: #FEF2F2;
    border-color: #FECACA;
    color: #B91C1C;
}

[data-theme="dark"] .btn-danger-subtle {
    background: rgba(239, 68, 68, 0.13);
    border-color: rgba(239, 68, 68, 0.25);
    color: #FECACA;
}

.btn-icon-md {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 8px;
}

.btn-icon-md svg {
    width: 20px;
    height: 20px;
}

.btn-md {
    min-height: 40px;
    padding: 0 16px;
    font-size: 14px;
    font-weight: 600;
}

.date-input {
    padding: 0 12px;
}

.status {
    min-height: 22px;
    margin-bottom: 12px;
    color: var(--muted);
    font-size: 14px;
}

.schedule {
    display: grid;
    grid-template-columns: 96px repeat(7, minmax(0, 1fr));
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.corner,
.day-head,
.time-cell,
.day-cell {
    border-right: 1px solid var(--panel-border);
    border-bottom: 1px solid var(--panel-border);
}

.corner,
.day-head {
    min-height: 58px;
    padding: 10px;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.day-head strong {
    display: block;
}

.day-head span {
    color: var(--muted);
    font-size: 13px;
}

.time-cell {
    padding: 10px;
    color: var(--muted);
    font-size: 13px;
    background: color-mix(in srgb, var(--panel-border) 26%, transparent);
}

.day-cell {
    min-height: 118px;
    padding: 8px;
}

.lesson {
    height: 100%;
    min-height: 96px;
    border-left: 4px solid var(--green);
    border-radius: 7px;
    background: color-mix(in srgb, var(--green) 10%, transparent);
    padding: 9px;
}

.lesson-title {
    font-weight: 700;
    line-height: 1.25;
}

.lesson-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 8px;
}

.chip {
    border: 1px solid var(--panel-border);
    border-radius: 999px;
    padding: 3px 8px;
    color: var(--muted);
    font-size: 12px;
    background: var(--panel);
}

.btn-sm {
    min-height: 32px;
    padding: 0 10px;
    font-size: 12px;
    font-weight: 700;
}

.workspace-nav {
    display: inline-flex;
    gap: 4px;
    margin: 0 0 18px;
    padding: 5px;
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.workspace-tab {
    min-height: 38px;
    padding: 0 15px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--muted);
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}

.workspace-tab span {
    display: inline-grid;
    min-width: 20px;
    min-height: 20px;
    margin-left: 5px;
    place-items: center;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    font-size: 11px;
}

.workspace-tab.active {
    background: var(--text);
    color: var(--panel);
}

.workspace-view[hidden],
.request-dialog-overlay[hidden] {
    display: none;
}

.workspace-view.active {
    animation: workspace-in 0.28s ease both;
}

@keyframes workspace-in {
    from { opacity: 0; transform: translateY(7px); }
    to { opacity: 1; transform: translateY(0); }
}

.preference-hero,
.request-ledger-head {
    position: relative;
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 14px;
    padding: 26px;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--panel-border));
    border-radius: 18px;
    background:
        linear-gradient(120deg, color-mix(in srgb, var(--accent) 13%, transparent), transparent 58%),
        var(--panel);
    box-shadow: var(--shadow);
}

.preference-hero::after {
    position: absolute;
    top: -90px;
    right: 18%;
    width: 180px;
    height: 180px;
    border: 1px solid color-mix(in srgb, var(--accent) 23%, transparent);
    border-radius: 50%;
    content: '';
}

.preference-kicker,
.request-ledger-head > div > span {
    color: var(--accent-strong);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.preference-hero h2,
.request-ledger-head h2 {
    max-width: 720px;
    margin: 7px 0;
    font-size: clamp(24px, 4vw, 42px);
    line-height: 1.02;
    letter-spacing: -0.035em;
}

.preference-hero p,
.request-ledger-head p {
    max-width: 760px;
    margin: 0;
    color: var(--muted);
    line-height: 1.55;
}

.preference-semester-field,
.preference-board-head label,
.request-dialog label {
    display: grid;
    gap: 6px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}

.preference-semester-field {
    position: relative;
    z-index: 1;
    min-width: 280px;
}

.preference-semester-field select,
.preference-board-head select,
.preference-date-form input,
.request-dialog select,
.request-dialog textarea {
    min-height: 42px;
    padding: 0 12px;
    border: 1px solid var(--panel-border);
    border-radius: 9px;
    background: var(--panel);
    color: var(--text);
    font: inherit;
}

.preference-board,
.preference-card {
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.preference-board {
    padding: 20px;
}

.preference-board-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
}

.preference-board-head > div > span,
.preference-card-number {
    color: var(--accent-strong);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.preference-board-head h3,
.preference-card h3 {
    margin: 5px 0 0;
    font-size: 19px;
}

.preference-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0 10px;
}

.preference-legend span {
    padding: 4px 9px;
    border: 1px solid var(--panel-border);
    border-radius: 999px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
}

.preference-legend .is-preferred { border-color: #10b981; color: #047857; }
.preference-legend .is-unwanted { border-color: #f59e0b; color: #b45309; }
.preference-legend .is-hard { border-color: #f43f5e; color: #be123c; }
.preference-legend .is-pending { border-style: dashed; }

.preference-grid-wrap {
    overflow-x: auto;
    padding-bottom: 4px;
}

.preference-grid {
    display: grid;
    min-width: 780px;
    grid-template-columns: 110px repeat(7, minmax(78px, 1fr));
    gap: 6px;
}

.preference-grid-corner,
.preference-grid-day,
.preference-grid-time,
.preference-cell {
    min-height: 48px;
    border: 1px solid var(--panel-border);
    border-radius: 9px;
}

.preference-grid-corner,
.preference-grid-day {
    display: grid;
    place-items: center;
    background: color-mix(in srgb, var(--panel-border) 22%, transparent);
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.preference-grid-time {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
}

.preference-grid-time strong {
    display: grid;
    width: 25px;
    height: 25px;
    place-items: center;
    border-radius: 7px;
    background: var(--text);
    color: var(--panel);
    font-size: 12px;
}

.preference-grid-time span {
    color: var(--muted);
    font-size: 11px;
}

.preference-cell {
    position: relative;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    transition: transform .16s ease, border-color .16s ease, background .16s ease;
}

.preference-cell:hover { transform: translateY(-2px); border-color: var(--accent); }
.preference-cell span { font-size: 19px; font-weight: 900; }
.preference-cell.is-preferred { border-color: #10b981; background: color-mix(in srgb, #10b981 15%, transparent); color: #047857; }
.preference-cell.is-unwanted { border-color: #f59e0b; background: color-mix(in srgb, #f59e0b 15%, transparent); color: #b45309; }
.preference-cell.is-hard { border-color: #f43f5e; background: color-mix(in srgb, #f43f5e 14%, transparent); color: #be123c; }
.preference-cell.is-pending::after {
    position: absolute;
    inset: 3px;
    border: 1px dashed currentColor;
    border-radius: 6px;
    content: '';
    opacity: .7;
}

.preference-message,
.request-dialog-message {
    min-height: 20px;
    margin-top: 10px;
    font-size: 13px;
}

.preference-message.success { color: #059669; }
.preference-message.error,
.request-dialog-message.error { color: #dc2626; }

.preference-lower-grid {
    display: grid;
    grid-template-columns: 1.35fr .65fr;
    gap: 14px;
    margin-top: 14px;
}

.preference-card {
    padding: 20px;
}

.preference-card p {
    margin: 7px 0 16px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.5;
}

.preference-date-form {
    display: grid;
    grid-template-columns: 170px 1fr auto;
    gap: 8px;
}

.preference-date-list {
    display: grid;
    gap: 7px;
    margin-top: 12px;
}

.preference-date-list article {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    gap: 9px;
    align-items: center;
    padding: 9px;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
}

.preference-date-list small { display: block; margin-top: 2px; color: var(--muted); }
.preference-date-mark { width: 7px; height: 34px; border-radius: 9px; background: #f59e0b; }
.preference-date-mark.approved { background: #f43f5e; }
.preference-status { color: var(--muted); font-size: 11px; font-weight: 800; }
.preference-empty { padding: 14px; color: var(--muted); text-align: center; font-size: 13px; }

.preference-toggle-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px;
    align-items: start;
    margin-top: 9px;
    padding: 12px;
    border: 1px solid var(--panel-border);
    border-radius: 11px;
    cursor: pointer;
}

.preference-toggle-card.approved { border-color: #10b981; background: color-mix(in srgb, #10b981 8%, transparent); }
.preference-toggle-card input { margin-top: 3px; accent-color: var(--accent); }
.preference-toggle-card strong,
.preference-toggle-card small { display: block; }
.preference-toggle-card small { margin-top: 3px; color: var(--muted); line-height: 1.4; }

.lesson-request-button {
    width: 100%;
    margin-top: 9px;
    padding: 6px 8px;
    border: 1px solid color-mix(in srgb, var(--green) 35%, var(--panel-border));
    border-radius: 7px;
    background: var(--panel);
    color: var(--green);
    font: inherit;
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
}

.lesson-change-note { display: block; margin-top: 8px; color: var(--muted); font-size: 10px; }

.request-ledger-head h2 { font-size: clamp(24px, 3vw, 34px); }
.request-ledger { display: grid; gap: 10px; }
.request-empty { padding: 28px; border: 1px dashed var(--panel-border); border-radius: 14px; color: var(--muted); text-align: center; }

.request-ledger-item {
    display: grid;
    grid-template-columns: 7px minmax(0, 1fr) auto;
    gap: 17px;
    padding: 17px;
    border: 1px solid var(--panel-border);
    border-radius: 15px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.request-ledger-stripe { border-radius: 99px; background: #94a3b8; }
.request-ledger-stripe.pending { background: #f59e0b; }
.request-ledger-stripe.approved { background: #10b981; }
.request-ledger-stripe.rejected { background: #f43f5e; }
.request-ledger-main > span { color: var(--muted); font-size: 12px; }
.request-ledger-main h3 { margin: 4px 0; }
.request-ledger-main p { margin: 3px 0; color: var(--muted); font-size: 13px; }
.request-change-line { display: flex; align-items: center; gap: 9px; margin: 12px 0; font-size: 13px; }
.request-change-line b { color: var(--accent-strong); }
.request-change-line i { color: var(--muted); font-style: normal; }
.request-ledger-main .request-reason { color: var(--text); }
.request-ledger-main .request-review-comment { color: #047857; }
.request-ledger-main details { margin-top: 10px; }
.request-ledger-main summary { color: var(--muted); font-size: 12px; cursor: pointer; }
.request-ledger-main ol { display: grid; gap: 5px; padding-left: 20px; }
.request-ledger-main li { padding-left: 5px; font-size: 12px; }
.request-ledger-main li time,
.request-ledger-main li strong,
.request-ledger-main li span { margin-right: 8px; }
.request-ledger-main li time { color: var(--muted); }
.request-ledger-side { display: flex; flex-direction: column; align-items: end; gap: 9px; }
.request-status { padding: 5px 9px; border: 1px solid currentColor; border-radius: 999px; color: var(--muted); font-size: 11px; font-weight: 800; }
.request-status.pending { color: #b45309; }
.request-status.approved { color: #047857; }
.request-status.rejected { color: #be123c; }

.request-dialog-overlay {
    position: fixed;
    z-index: 1000;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(7, 12, 22, .68);
    backdrop-filter: blur(7px);
}

.dialog-open { overflow: hidden; }
.request-dialog {
    width: min(760px, 100%);
    max-height: calc(100vh - 40px);
    overflow: auto;
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    background: var(--panel);
    box-shadow: 0 35px 90px rgba(0, 0, 0, .35);
}

.request-dialog header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 20px;
    border-bottom: 1px solid var(--panel-border);
    background: linear-gradient(115deg, color-mix(in srgb, var(--accent) 12%, transparent), transparent);
}

.request-dialog header span { color: var(--accent-strong); font-size: 11px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.request-dialog header h2 { margin: 5px 0; }
.request-dialog header p { margin: 0; color: var(--muted); font-size: 13px; }
.request-dialog form { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; padding: 20px; }
.request-dialog [hidden] { display: none; }
.request-dialog textarea { min-height: 100px; padding-top: 10px; resize: vertical; }
.request-reason-field,
.request-dialog-message,
.request-dialog footer { grid-column: 1 / -1; }
.request-dialog footer { display: flex; justify-content: flex-end; gap: 8px; padding-top: 5px; }

.empty {
    color: var(--muted);
    font-size: 13px;
}

.error {
    color: var(--orange);
}

@media (max-width: 980px) {
    .schedule {
        display: block;
        border: 0;
        background: transparent;
        box-shadow: none;
    }

    .mobile-day {
        margin-bottom: 10px;
        border: 1px solid var(--panel-border);
        border-radius: 8px;
        background: var(--panel);
        overflow: hidden;
    }

    .mobile-day .day-head {
        border-right: 0;
    }

    .mobile-list {
        display: flex;
        flex-direction: column;
        gap: 8px;
        padding: 10px;
    }
}

@media (max-width: 640px) {
    .shell {
        padding: 16px;
    }

    .topbar,
    .toolbar,
    .actions {
        display: grid;
        align-items: stretch;
    }

    .week-nav .btn {
        flex: 1;
    }

    .workspace-nav,
    .preference-hero,
    .preference-board-head,
    .request-ledger-head {
        display: grid;
        width: 100%;
    }

    .workspace-tab { text-align: left; }
    .preference-semester-field { min-width: 0; }
    .preference-lower-grid,
    .preference-date-form,
    .request-dialog form { grid-template-columns: 1fr; }
    .preference-date-form .btn,
    .request-reason-field,
    .request-dialog-message,
    .request-dialog footer { grid-column: auto; }
    .request-ledger-item { grid-template-columns: 6px minmax(0, 1fr); }
    .request-ledger-side { grid-column: 2; align-items: start; }
    .request-dialog footer { flex-direction: column-reverse; }
}