:root {
    --bg: #f4f4f4;
    --card: white;
    --text: #333;
    --border: #ddd;
    --header: #007bff;
    --day-line: #007bff;
    --break-bg: #dddddd;
    --hover: #f1f1f1;
    --thead-bg: #007bff;
    --current-color: rgba(40,167,69,0.15);
    --current-border: #28a745;
    --next-color: rgba(255,193,7,0.15);
    --next-border: #ffc107;
    --row-hover: rgba(0,123,255,0.09);
    --cell-hover: rgba(0,123,255,0.16);
}
.dark {
    --bg: #222;
    --card: #333;
    --text: #ddd;
    --border: #555;
    --header: #1E90FF;
    --day-line: #1E90FF;
    --break-bg: #444;
    --hover: #555;
    --thead-bg: #0056b3;
    --current-color: rgba(40,167,69,0.25);
    --current-border: #28a745;
    --next-color: rgba(255,193,7,0.25);
    --next-border: #ffc107;
    --row-hover: rgba(30,144,255,0.18);
    --cell-hover: rgba(30,144,255,0.28);
}

html,body{min-height:100vh;}
body {
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 20px;
    transition: background 0.3s, color 0.3s;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
    position: relative;
}

#header {
    position: relative;
    max-width: 1100px;
    margin: 0 auto 18px;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(30,144,255,0.10), rgba(30,144,255,0));
    border-radius: 18px;
    border: 1px solid rgba(30,144,255,0.2);
    box-shadow: 0 12px 28px rgba(15,23,42,0.06);
}

body.dark #header {
    background: linear-gradient(135deg, rgba(30,144,255,0.18), rgba(30,144,255,0.05));
    border-color: rgba(30,144,255,0.28);
    box-shadow: 0 24px 60px rgba(0,0,0,0.35);
}
#header::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background: radial-gradient(circle at top left, rgba(30,144,255,0.22), transparent 55%);
    opacity: 0.7;
}
#header .title-block {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 70%;
    z-index: 1;
}
#header h1 {
    margin: 0;
    font-size: 28px;
    line-height: 1.2;
    letter-spacing: 0.4px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
#header h1 .view-title {
    font-weight: 700;
}
#header h1 .view-badge {
    font-size: 18px;
    color: #fff;
    background: linear-gradient(135deg, #ff7b7b, #ff3d3d);
    padding: 3px 14px 4px;
    border-radius: 999px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    box-shadow: 0 10px 26px rgba(255, 61, 61, 0.28);
}
body.dark #header h1 .view-badge {
    background: linear-gradient(135deg, #ff5252, #ff1e4d);
    box-shadow: 0 12px 30px rgba(255, 62, 86, 0.45);
}
#headerMeta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    margin: 0;
    padding: 0;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.4s ease, transform 0.45s ease;
    will-change: opacity, transform; /* ОПТИМИЗАЦИЯ */
}
#headerMeta .meta-panel {
    margin: 0;
    padding: 14px 18px;
    border-radius: 18px;
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(30,144,255,0.18);
    box-shadow: 0 18px 34px rgba(15,23,42,0.08);
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: rgba(15,23,42,0.82);
    /* Добавлена анимация для карточек в header */
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    will-change: transform, box-shadow;
}
/* Добавлена анимация для карточек в header */
#headerMeta .meta-panel:hover,
#headerMeta .meta-panel:focus-within {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 24px 42px rgba(15,23,42,0.12);
}

body.dark #headerMeta .meta-panel {
    background: rgba(15,23,42,0.78);
    border-color: rgba(94,168,255,0.32);
    color: rgba(240,244,255,0.9);
    box-shadow: 0 22px 42px rgba(0,0,0,0.5);
}
/* Добавлена анимация для карточек в header (dark mode) */
body.dark #headerMeta .meta-panel:hover,
body.dark #headerMeta .meta-panel:focus-within {
    box-shadow: 0 28px 50px rgba(0,0,0,0.6);
}

#headerMeta .meta-heading {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 15px;
}
#headerMeta .meta-heading .meta-stamp {
    font-weight: 500;
    font-size: 13px;
    opacity: 0.75;
}
body.dark #headerMeta .meta-heading .meta-stamp {
    color: rgba(222,235,255,0.88);
    opacity: 0.85;
}
#headerMeta .meta-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--header), rgba(30,144,255,0.72));
    color: #fff;
    font-size: 12px;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}
body.dark #headerMeta .meta-tag {
    background: linear-gradient(135deg, rgba(94,168,255,0.92), rgba(30,144,255,0.72));
    color: #0f172a;
}
#headerMeta p {
    margin: 0;
    font-size: 15px;
    line-height: 1.4;
}
#headerMeta .meta-main {
    font-weight: 600;
}
#headerMeta .meta-note {
    font-size: 13px;
    opacity: 0.85;
}
#headerMeta .meta-panel.state-now .meta-tag {
    background: linear-gradient(135deg, #2dd07d, #18a85d);
}
#headerMeta .meta-panel.state-break .meta-tag {
    background: linear-gradient(135deg, #ffc857, #ff9f1c);
    color: #1f1300;
}
#headerMeta .meta-panel.state-next .meta-tag {
    background: linear-gradient(135deg, #4f46e5, #6366f1);
}
#headerMeta .meta-panel.state-done .meta-tag {
    background: linear-gradient(135deg, #ef4444, #f97316);
}
body.is-authenticated #headerMeta {
    opacity: 1;
    transform: translateY(0);
}
#themeToggle {
    position: relative;
    z-index: 1;
    padding: 10px 16px;
    background: linear-gradient(135deg, #58b2ff, #1e90ff);
    color: #fff;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(30,144,255,0.18);
    transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.3s ease;
    will-change: transform, box-shadow, filter; /* ОПТИМИЗАЦИЯ */
}
#themeToggle:hover,
#themeToggle:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(30,144,255,0.24);
    outline: none;
    filter: brightness(1.03);
}
#themeToggle:active {
    transform: translateY(0);
}
#themeToggle .theme-icon {
    font-size: 18px;
}
#themeToggle .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}


#viewContainer {
    position: relative;
    max-width: 1100px;
    margin: 0 auto 60px;
    transition: height 0.45s cubic-bezier(.22,.68,.12,1.02);
    position: relative;
    will-change: height;
}

.view-panel {
    position: relative;
    display: none;
    padding-top: 30px;
    padding-bottom: 60px;
    will-change: opacity, transform;
}

.view-panel.is-active {
    display: block;
}

#schedule {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 22px;
    position: relative;
    transition: opacity 0.55s ease, transform 0.55s ease;
    will-change: opacity, transform;
}
body:not(.is-authenticated) #viewContainer {
    display: none;
}
body:not(.is-authenticated) #schedule {
    opacity: 0;
    transform: translateY(36px);
    pointer-events: none;
    max-height: 0;
    overflow: hidden;
    margin: 0 auto;
}
body.is-authenticated #schedule {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    max-height: none;
    margin: 30px auto 60px;
}

.day-card {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: linear-gradient(180deg, var(--card) 0%, rgba(240, 245, 255, 0.95) 100%);
    border-radius: 20px;
    border: 1px solid rgba(30,144,255,0.18);
    box-shadow: 0 8px 22px rgba(0,0,0,0.06);
    transform: translateY(0);
    transition:
      opacity 0.45s cubic-bezier(.22,.68,.12,1.02),
      transform 0.45s cubic-bezier(.22,.68,.12,1.02),
      box-shadow 0.3s ease;
    will-change: height, opacity, transform;
}
.day-card:hover {
    box-shadow: 0 14px 34px rgba(0,0,0,0.12);
    transform: translateY(-2px);
}
.day-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30,144,255,0.12), rgba(30,144,255,0.04));
    opacity: 1;
    pointer-events: none;
}
body.dark .day-card {
    border-color: rgba(94,168,255,0.32);
    box-shadow: 0 22px 50px rgba(0,0,0,0.5);
}
body.dark .day-card::before {
    background: linear-gradient(140deg, rgba(30,144,255,0.45), rgba(15,23,42,0.68));
}
body.dark .day-header {
    background: linear-gradient(135deg, rgba(37,99,235,0.28), rgba(15,23,42,0.72));
    border-bottom-color: rgba(94,168,255,0.32);
}
.day-card > * {
    position: relative;
    z-index: 1;
}
.day-card:hover {
    box-shadow: 0 28px 58px rgba(15, 23, 42, 0.18);
}
.day-card[data-state="shown"] {
    opacity: 1;
    transform: translateY(0);
}

.day-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding: 20px 26px;
    background: linear-gradient(135deg, rgba(30,144,255,0.18), rgba(30,144,255,0.05));
    border-radius: 18px 18px 0 0;
    border-bottom: 1px solid rgba(30,144,255,0.25);
    margin-bottom: 0;
}
.day-title {
    margin: 0;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--header);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1 1 240px;
}
.day-title .day-name {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 9px 22px 10px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(30,144,255,0.92), rgba(26,116,219,0.92));
    color: #f8fafc;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    box-shadow: 0 14px 30px rgba(30,144,255,0.28);
    position: relative;
}
.day-title .day-name::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    border: 2px solid rgba(255,255,255,0.08);
    pointer-events: none;
}
body.dark .day-title .day-name {
    background: linear-gradient(135deg, rgba(37,99,235,0.95), rgba(30,64,175,0.95));
    color: rgba(241,245,255,0.96);
    box-shadow: 0 18px 38px rgba(15,23,42,0.45);
}
body.dark .day-title .day-name::after {
    border-color: rgba(94,168,255,0.28);
}
.day-badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.day-badge {
    background: rgba(255,255,255,0.74);
    color: var(--header);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: inset 0 0 0 1px rgba(30,144,255,0.18);
}
.day-badge .emoji {
    font-size: 14px;
}
body.dark .day-badge {
    background: rgba(15,23,42,0.72);
    color: rgba(222,235,255,0.95);
    box-shadow: inset 0 0 0 1px rgba(94,168,255,0.42);
}

.day-body {
    background: transparent;
    border: none;
    box-shadow: none;
    overflow: hidden;
    border-radius: 0;
}
body.dark .day-body {
    background: rgba(15,23,42,0.78);
    border-color: rgba(94,168,255,0.32);
    box-shadow: inset 0 1px 0 rgba(94,168,255,0.24);
}
.day-body::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(30,144,255,0.12), transparent 65%);
    pointer-events: none;
}
.day-body > * {
    position: relative;
    z-index: 1;
}
.table-wrap.animate-in,
.table-wrap.animate-out {
    animation-duration: 0.55s;
    animation-timing-function: cubic-bezier(.22,.68,.12,1.02);
    animation-fill-mode: both;
}
.table-wrap.animate-in { animation-name: tableSlideIn; }
.table-wrap.animate-out { animation-name: tableSlideOut; }

@keyframes tableSlideIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes tableSlideOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-24px); }
}

table {
    width: 100%;
    border-collapse: collapse;
    background: transparent;
    color: var(--text);
    font-size: 15px;
    transition: background 0.3s;
}
thead {
    background: transparent;
    color: inherit;
}
thead tr {
    background: linear-gradient(135deg, rgba(30,144,255,0.12), rgba(30,144,255,0.04));
    border-bottom: 1px solid rgba(30,144,255,0.16);
}
body.dark thead tr {
    background: linear-gradient(135deg, rgba(94,168,255,0.16), rgba(15,23,42,0.75));
    border-bottom: 1px solid rgba(94,168,255,0.28);
}
th {
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.65px;
    padding: 16px 18px 18px;
    font-size: 16px;
    font-weight: 700;
    border-bottom: 0;
    color: rgba(15,23,42,0.86);
}
body.dark th {
    color: rgba(240,244,255,0.92);
}
th::after {
    content: '';
    display: block;
    height: 3px;
    border-radius: 999px;
    margin-top: 10px;
    background: var(--th-accent, rgba(30,144,255,0.65));
    opacity: 0.9;
}
body.dark th::after {
    background: var(--th-accent, rgba(94,168,255,0.85));
    opacity: 1;
}
th:nth-child(1) {
    --th-accent: #2563eb;
    text-align: left;
    min-width: 140px;
}
th:nth-child(2) {
    --th-accent: #1d4ed8;
    text-align: left;
}
th:nth-child(3) {
    --th-accent: #0ea5e9;
    text-align: center;
}
th:nth-child(4) {
    --th-accent: #6366f1;
    text-align: left;
}
td {
    padding: 14px 18px;
    text-align: left;
    border-top: 1px solid rgba(0,0,0,0.06);
}
td:nth-child(1) {
    font-weight: 700;
    color: var(--header);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.3px;
}
td.time-cell {
    white-space: nowrap;
}
td.time-cell .time-content {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
td.time-cell .time-sep {
    opacity: 0.65;
}
td.time-cell .time-end {
    font-weight: 600;
}
body.dark td:nth-child(1) {
    color: rgba(94,168,255,0.9);
}
td:nth-child(2) {
    font-weight: 600;
    color: rgba(15,23,42,0.92);
}
body.dark td:nth-child(2) {
    color: rgba(241,245,255,0.95);
}
td:nth-child(3) {
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.35px;
}
td:nth-child(4) {
    font-weight: 500;
    color: rgba(30,41,59,0.82);
}
body.dark td:nth-child(4) {
    color: rgba(203,213,225,0.88);
}
tbody tr + tr td {
    border-top: 1px solid rgba(30,144,255,0.12);
}
body.dark tbody tr + tr td {
    border-top-color: rgba(94,168,255,0.24);
}
tbody td {
  background: rgba(255,255,255,0.82);
  transition: background 0.18s ease, color 0.18s ease;
}
body.dark tbody td {
  background: rgba(15,23,42,0.88);
}
tbody tr:hover td {
  background: rgba(30,144,255,0.045);
}
body.dark tbody tr:hover td {
  background: rgba(30,144,255,0.12);
}
td:hover {
  background: rgba(30,144,255,0.12) !important;
  color: var(--text);
}
body.dark td:hover {
  background: rgba(30,144,255,0.22) !important;
}

.current-lesson {
  background-color: var(--current-color);
  font-weight: 700;
  /* animation: pulse 2s infinite; */ /* ОПТИМИЗАЦИЯ: Удалена анимация pulse */
}

/* ОПТИМИЗАЦИЯ: Удалена анимация pulse, т.к. box-shadow непроизводителен */
/* @keyframes pulse { ... } */


.next-lesson { background-color: var(--next-color); }

.current-lesson td { background-color: var(--current-color) !important; }
.next-lesson td    { background-color: var(--next-color) !important; }
.break-row td {
    text-align: center;
    font-style: italic;
    background-color: var(--break-bg) !important;
    color: var(--text);
    border-left: none;
    border-right: none;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.break-row td[colspan] {
  padding: 9px 0;
  font-size: 16px;
}
.break-row:hover td {
    background-color: var(--break-bg) !important;
}
.break-current td {
    background-color: var(--current-color) !important;
    font-style: italic;
    font-weight: bold;
}

.current-lesson td:first-child, .next-lesson td:first-child { position: relative; }
.current-lesson td:first-child::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 5px;
    height: 100%;
    background-color: var(--current-border);
}
.next-lesson td:first-child::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 5px;
    height: 100%;
    background-color: var(--next-border);
}
tr { transition: background 0.18s ease; }

tr.row-hover td {
  background: var(--row-hover);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(30,144,255,0.14);
}
tr.row-hover td.cell-hover {
  background: var(--cell-hover) !important;
  color: var(--text);
}

#loginForm {
  max-width: 420px;
  margin: auto;
  padding: 28px;
  background: var(--card);
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
  display: block;
  text-align: center;
  transition: transform 0.45s ease, box-shadow 0.45s ease;
  will-change: transform, box-shadow; /* ОПТИМИЗАЦИЯ */
}

#loginForm.login-checking {
  box-shadow: 0 16px 42px rgba(30,144,255,0.18);
  transform: translateY(-4px);
  animation: loginPulse 1.4s ease-in-out infinite;
  will-change: transform; /* ОПТИМИЗАЦИЯ */
}

#loginForm.login-error {
  animation: loginShake 0.6s cubic-bezier(.36,.07,.19,.97);
  transition: none;
  will-change: transform;
}

/* ОПТИМИЗАЦИЯ: Анимация box-shadow заменена на transform */
@keyframes loginPulse {
  0%, 100% { transform: translateY(-4px) scale(1); }
  50%      { transform: translateY(-5px) scale(1.01); }
}

@keyframes loginShake {
  0%, 100% { transform: translateX(0); }
  10%, 90% { transform: translateX(-3px); }
  20%, 80% { transform: translateX(5px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60% { transform: translateX(7px); }
}

.login-fields {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 8px;
}

#loginForm h2 {
    margin: 0 0 10px;
    font-size: 22px;
}

#loginForm input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card);
    color: var(--text);
    font-size: 15px;
    box-sizing: border-box;
    transition: border-color .18s, box-shadow .18s;
}
#loginForm input:hover {
    border-color: rgba(0,123,255,0.55);
    box-shadow: 0 0 0 3px rgba(0,123,255,0.06);
}
#loginForm input:focus {
    outline: none;
    border-color: rgba(30,144,255,0.8);
    box-shadow: 0 8px 22px rgba(30,144,255,0.14);
}

.login-actions { display: flex; flex-direction: column; gap:10px; margin-top: 8px; }
.login-actions .btn {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: none;
    font-size: 15px;
    cursor: pointer;
}
.btn-primary { background: var(--header); color: #fff; position: relative; }
.btn-primary:hover { background: #005fcb; }
.btn-primary.loading {
  color: transparent;
  pointer-events: none;
}
.btn-primary.loading::after {
  content: "Signing in…";
  color: #fff;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-weight: 600;
  letter-spacing: 0.4px;
}
.btn-primary.loading::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  transform: translateY(-50%);
  animation: spinner 0.8s linear infinite;
}

@keyframes spinner {
  to { transform: translateY(-50%) rotate(360deg); }
}
.btn-secondary { background: #6c757d; color: #fff; }
.btn-secondary:hover { background: #5a6268; }
.btn {
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

#loginForm p { margin-top: 14px; font-size: 13px; color: var(--text); }

#loginError {
  color: #ff4d4f;
  margin-top: 10px;
  font-weight: 600;
  min-height: 18px;
}

body:not(.is-authenticated) #logoutBtn {
    opacity: 0;
    transform: translateY(22px) scale(0.9);
    pointer-events: none;
}

#logoutBtn {
    position: fixed;
    bottom: 28px;
    right: 32px;
    padding: 12px 18px;
    background: linear-gradient(135deg, #ff5f6d, #ff3d55);
    color: #fff;
    border: none;
    border-radius: 16px;
    cursor: pointer;
    z-index: 20;
    font-weight: 600;
    letter-spacing: 0.4px;
    box-shadow: 0 18px 32px rgba(255,61,85,0.25);
    opacity: 0;
    transform: translateY(22px) scale(0.9);
    pointer-events: none;
    transition: opacity 0.35s ease, transform 0.35s ease, box-shadow 0.2s ease;
    will-change: opacity, transform, box-shadow; /* ОПТИМИЗАЦИЯ */
}
#logoutBtn.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
    animation: logoutFloat 6s ease-in-out infinite 0.6s;
}
#logoutBtn:hover,
#logoutBtn:focus-visible {
    box-shadow: 0 22px 40px rgba(255,61,85,0.32);
    outline: none;
}
#logoutBtn:active {
    transform: translateY(2px) scale(0.97);
    animation-play-state: paused;
}

@keyframes logoutFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-6px) scale(1.01); }
}

#bar {
  max-width: 1100px;
  margin: 0 auto 18px;
  padding: 0 16px;
  display: none;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 5;
}
#bar.visible {
  display: flex;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

body:not(.is-authenticated) #bar {
  display: none;
}

#bar.is-unauth {
  justify-content: center;
}

body:not(.is-authenticated) .filter-wrap {
  justify-content: center;
}

body:not(.is-authenticated) #dayFilterBtn,
body:not(.is-authenticated) #dayMenu,
body:not(.is-authenticated) #statusBar {
  display: none !important;
}

body:not(.is-authenticated) #calendarStatus {
  display: none !important;
}

body:not(.is-authenticated) .filter-wrap .view-switch {
  display: none;
}

.filter-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-wrap .view-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
#dayFilterBtn {
  padding: 10px 14px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--header);
  border-radius: 12px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(15,23,42,0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.3s ease;
  will-change: transform, box-shadow; /* ОПТИМИЗАЦИЯ */
}
#dayFilterBtn:hover,
#dayFilterBtn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(15,23,42,0.12);
  border-color: var(--header);
  outline: none;
}

#dayMenu {
  position: absolute;
  top: calc(100% + 12px);
  left: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 18px rgba(15,23,42,0.14);
  min-width: 210px;
  overflow: hidden;
  z-index: 50;
  opacity: 0;
  transform-origin: top center;
  transform: translateY(-10px) scaleY(0.75);
  pointer-events: none;
  transition: opacity 0.24s ease, transform 0.28s cubic-bezier(.22,.68,.12,1.02);
  clip-path: inset(-12px -12px 0 -12px round 20px);
  will-change: opacity, transform; /* ОПТИМИЗАЦИЯ */
}
#dayMenu.open {
  opacity: 1;
  transform: translateY(0) scaleY(1);
  pointer-events: auto;
}
#dayMenu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 11px 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-weight: 500;
  color: var(--text);
  transition: background 0.2s ease, padding-left 0.2s ease;
}

.view-toggle {
  padding: 10px 14px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 10px 24px rgba(15,23,42,0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.3s ease, background 0.3s ease;
  will-change: transform, box-shadow; /* ОПТИМИЗАЦИЯ */
}
.view-toggle:hover,
.view-toggle:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(15,23,42,0.12);
  border-color: var(--header);
  outline: none;
}
.view-toggle.active {
  background: linear-gradient(135deg, var(--header), rgba(30,144,255,0.72));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 16px 32px rgba(30,144,255,0.28);
}
body.dark .view-toggle.active {
  color: #0f172a;
}
.view-toggle:disabled,
.view-toggle[aria-disabled='true'] {
  cursor: default;
  opacity: 0.75;
  transform: none;
  box-shadow: 0 10px 24px rgba(15,23,42,0.06);
}
.view-toggle.active:disabled {
  opacity: 1;
}
#dayMenu button.active {
  background: rgba(30,144,255,0.1);
  color: var(--header);
  font-weight: 600;
}
#dayMenu button:hover {
  background: var(--hover);
  padding-left: 20px;
}

#statusBar {
  font-size: 15px;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  box-shadow: 0 3px 10px rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.4;
  transition: all 0.3s ease;
}
#statusBar { display: none !important; }
#statusBar::before {
  font-size: 18px;
}

#statusBar .sb-tag {
  background: var(--header);
  color: #fff;
  font-weight: 600;
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 13px;
}

#statusBar .sb-title {
  font-weight: 600;
}

#statusBar .sb-count, #statusBar .sb-time {
  font-weight: 700;
  color: var(--header);
}

#statusBar.in-lesson {
  border-left: 4px solid #28a745;
}
#statusBar.in-break {
  border-left: 4px solid #ffc107;
}
#statusBar.before {
  border-left: 4px solid var(--header);
}
#statusBar.done {
  border-left: 4px solid #dc3545;
  opacity: .9;
}

#statusBar.in-lesson::before { content: "📘"; }
#statusBar.in-break::before { content: "☕"; }
#statusBar.before::before { content: "⏰"; }
#statusBar.done::before { content: "🎉"; }

.no-classes {
  text-align: center;
  background: rgba(30,144,255,0.06);
  border: 1px dashed var(--border);
  color: var(--text);
  border-radius: 14px;
  padding: 28px 0;
  margin: 12px 0 24px;
  font-size: 15px;
  opacity: 0.92;
  transition: opacity 0.3s ease;
}

body.dark .no-classes {
  background: var(--card);
  border-color: var(--border);
  color: var(--text);
}

#dayMenu {
  background: var(--card);
  border-color: var(--border);
  color: var(--text);
}

#dayMenu button {
  color: var(--text) !important;
  background: transparent;
}

#dayMenu button:hover {
  background: var(--hover);
  color: var(--text);
}
#dayMenu button:focus-visible {
  outline: 2px solid var(--header);
  outline-offset: 2px;
}

#loginForm {
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

#loginForm.login-intro {
  animation: fadeIn 0.8s ease both;
}

@keyframes fadeIn {
  from {opacity: 0; transform: translateY(10px);}
  to {opacity: 1; transform: translateY(0);}
}

#loginForm input:focus {
  border-color: rgba(30,144,255,0.8);
  box-shadow: 0 8px 22px rgba(30,144,255,0.14);
}

#loginForm h2 {
  letter-spacing: 0.5px;
  color: var(--header);
}

.btn-primary {
  background: var(--header);
  color: #fff;
  border: none;
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.2s ease;
  will-change: background;
  position: relative;
}
.btn-primary:disabled {
  background: #6c757d;
  cursor: not-allowed;
  opacity: 0.8;
  box-shadow: none;
  transform: none;
}

body.dark .btn-primary:not(:disabled) {
  background: var(--header);
}

@media (max-width: 768px) {
  #header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
  }
  #header::after { opacity: 0.45; }
  #header .title-block {
    max-width: 100%;
  }
  #headerMeta {
    width: 100%;
    flex-direction: column;
  }
  #themeToggle {
    align-self: flex-end;
    padding: 8px 12px;
  }
  #logoutBtn {
    bottom: 10px;
    padding: 6px 12px;
    font-size: 14px;
  }
  #bar {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }
  .filter-wrap {
    width: 100%;
    justify-content: space-between;
  }
  .filter-wrap .view-switch {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
  .view-toggle {
    justify-content: center;
  }
  #dayFilterBtn {
    flex: 1 1 160px;
  }
  #statusBar,
  #calendarStatus {
    width: 100%;
    text-align: left;
  }
  #viewContainer,
  #schedule,
  #calendarMain {
    margin-left: 16px;
    margin-right: 16px;
  }
  #calendarMain {
    margin-top: 20px;
    margin-bottom: 40px;
    padding: 0 8px 28px;
  }
}

@media (max-width: 480px) {
  #loginForm {
    margin: 16px;
    padding: 18px;
  }
  #schedule {
    padding-bottom: 60px;
  }
  #statusBar {
    flex-wrap: wrap;
    text-align: center;
    gap: 6px;
  }
}
@media print{
  #themeToggle,#logoutBtn,#loginForm,#bar{display:none !important}
  body{margin:0}
  h2{margin-top:10px}
}
@media (max-width: 600px) {
  .day-body {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .day-body table {
    width: 100%;
    min-width: unset;
    border-radius: 10px;
  }
  table th, table td {
    font-size: 13px;
    padding: 6px;
    white-space: normal;
  }
  table th:first-child {
    min-width: 88px;
    width: auto;
    text-align: left;
  }
  table td.time-cell {
    font-size: 12px;
    line-height: 1.3;
    white-space: normal;
  }
  table td.time-cell .time-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2px;
  }
  table td.time-cell .time-content .time-sep {
    display: none;
  }
  table td.time-cell .time-content .time-end::before {
    content: '→ ';
    font-size: 11px;
    opacity: 0.7;
    margin-right: 2px;
  }

  .day-title {
    font-size: 18px;
    margin: 0;
  }

  #statusBar {
    font-size: 14px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

.calendar-subtitle {
  margin: 0;
  font-size: 16px;
  color: rgba(15,23,42,0.78);
  max-width: 580px;
}
body.dark .calendar-subtitle {
  color: rgba(240,244,255,0.78);
}

body[data-view="calendar"] #viewBadge {
  display: none;
}

body[data-view="calendar"] #calendarSubtitle {
  display: block !important;
}

body[data-view="calendar"] #dayFilterBtn {
  pointer-events: none;
  opacity: 0;
  transform: translateY(-10px);
  visibility: hidden;
}

body[data-view="calendar"] #dayMenu {
  display: none !important;
}

body[data-view="calendar"] #statusBar {
  display: none;
}

body[data-view="timetable"] #calendarStatus {
  display: none;
}

body[data-view="calendar"] #calendarStatus {
  display: block;
}

.calendar-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--header), rgba(30,144,255,0.7));
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 16px 32px rgba(30,144,255,0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.calendar-nav-link:hover,
.calendar-nav-link:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 20px 36px rgba(30,144,255,0.28);
  outline: none;
}
body.dark .calendar-nav-link {
  color: #0f172a;
  box-shadow: 0 20px 44px rgba(30,144,255,0.35);
}

#calendarMain {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px 40px;
}

.calendar-sections {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.calendar-section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 30px;
  box-shadow: 0 18px 40px rgba(15,23,42,0.08);
}
body.dark .calendar-section {
  box-shadow: 0 28px 58px rgba(0,0,0,0.55);
}

.calendar-section-title {
  margin: 0 0 22px;
  font-size: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.calendar-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.calendar-card {
  --accent: var(--header);
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 12px 28px rgba(15,23,42,0.07);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  will-change: transform, box-shadow; /* ОПТИМИЗАЦИЯ */
}
.calendar-card:hover,
.calendar-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 22px 46px rgba(15,23,42,0.12);
}

.calendar-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.calendar-semester-badge {
  background: rgba(30,144,255,0.12);
  color: var(--header);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
body.dark .calendar-semester-badge {
  background: rgba(94,168,255,0.24);
  color: rgba(222,235,255,0.9);
}

.calendar-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(15,23,42,0.04);
  color: var(--text);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
body.dark .calendar-type-badge {
  background: rgba(255,255,255,0.06);
  color: rgba(240,244,255,0.9);
}

.calendar-type-badge .badge-icon {
  font-size: 16px;
  line-height: 1;
}

.calendar-card-title {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
}

.calendar-card-range {
  margin: 0;
  font-weight: 600;
  font-size: 16px;
}

.calendar-card-detail {
  margin: 0;
  font-size: 14px;
  color: rgba(15,23,42,0.75);
}
body.dark .calendar-card-detail {
  color: rgba(240,244,255,0.75);
}

.calendar-card.is-start { --accent: #16a34a; }
.calendar-card.is-break { --accent: #f59e0b; }
.calendar-card.is-review { --accent: #6b7280; }
.calendar-card.is-exams { --accent: #dc2626; }
.calendar-card.is-end { --accent: #0ea5e9; }
.calendar-card.is-holiday { --accent: #8b5cf6; }
.calendar-card.is-event { --accent: var(--header); }

.calendar-loading,
.calendar-error,
.calendar-empty {
  text-align: center;
  margin: 60px auto;
  max-width: 520px;
  padding: 24px;
  border-radius: 18px;
  background: rgba(30,144,255,0.06);
  border: 1px dashed var(--border);
  font-size: 16px;
}
body.dark .calendar-loading,
body.dark .calendar-error,
body.dark .calendar-empty {
  background: rgba(15,23,42,0.35);
  border-color: rgba(148,163,184,0.35);
}

.calendar-error {
  border-color: rgba(239,68,68,0.35);
  color: #b91c1c;
}
body.dark .calendar-error {
  color: #fecaca;
}

#calendarStatus {
  font-size: 15px;
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  box-shadow: 0 10px 24px rgba(15,23,42,0.08);
}

@media (max-width: 640px) {
  .calendar-section {
    padding: 22px 20px;
  }
  .calendar-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}
.calendar-card.is-start .calendar-type-badge {
  background: rgba(22,163,74,0.16);
  color: #166534;
}
body.dark .calendar-card.is-start .calendar-type-badge {
  background: rgba(34,197,94,0.28);
  color: #bbf7d0;
}
.calendar-card.is-break .calendar-type-badge {
  background: rgba(245,158,11,0.18);
  color: #b45309;
}
body.dark .calendar-card.is-break .calendar-type-badge {
  background: rgba(245,158,11,0.28);
  color: #fde68a;
}
.calendar-card.is-review .calendar-type-badge {
  background: rgba(107,114,128,0.2);
  color: #374151;
}
body.dark .calendar-card.is-review .calendar-type-badge {
  background: rgba(107,114,128,0.32);
  color: #e5e7eb;
}
.calendar-card.is-exams .calendar-type-badge {
  background: rgba(220,38,38,0.18);
  color: #b91c1c;
}
body.dark .calendar-card.is-exams .calendar-type-badge {
  background: rgba(248,113,113,0.32);
  color: #fee2e2;
}
.calendar-card.is-end .calendar-type-badge {
  background: rgba(14,165,233,0.18);
  color: #0369a1;
}
body.dark .calendar-card.is-end .calendar-type-badge {
  background: rgba(56,189,248,0.28);
  color: #bae6fd;
}
.calendar-card.is-holiday .calendar-type-badge {
  background: rgba(139,92,246,0.2);
  color: #5b21b6;
}
body.dark .calendar-card.is-holiday .calendar-type-badge {
  background: rgba(167,139,250,0.34);
  color: #ede9fe;
}
.calendar-card.is-event .calendar-type-badge {
  background: rgba(30,144,255,0.16);
  color: var(--header);
}
body.dark .calendar-card.is-event .calendar-type-badge {
  background: rgba(94,168,255,0.3);
  color: rgba(222,235,255,0.92);
}