/* Visual upgrade: Neon Campus */
:root { --cyan-glow: rgba(70,182,255,.26); --green-glow: rgba(66,239,173,.22); }
body { background: #05070d; overflow-x: hidden; }
body::before { content:""; position:fixed; width:55vw; height:55vw; max-width:760px; max-height:760px; top:-34vw; right:-18vw; border-radius:50%; background:radial-gradient(circle,rgba(55,156,255,.17),transparent 66%); filter:blur(12px); pointer-events:none; animation:floatGlow 12s ease-in-out infinite; }
body::after { content:""; position:fixed; width:40vw; height:40vw; max-width:570px; max-height:570px; bottom:-28vw; left:12vw; border-radius:50%; background:radial-gradient(circle,rgba(66,239,173,.10),transparent 68%); pointer-events:none; }
.noise { opacity:.85; background-size:38px 38px,38px 38px,auto,auto; mask-image:linear-gradient(to bottom,black,transparent 90%); }
.sidebar { box-shadow:18px 0 55px rgba(0,0,0,.22); }
.logo { position:relative; padding-bottom:20px; }
.logo::after { content:""; position:absolute; left:8px; right:8px; bottom:0; height:1px; background:linear-gradient(90deg,var(--blue),transparent); opacity:.45; }
.nav-btn { position:relative; overflow:hidden; }
.nav-btn::before { content:""; position:absolute; inset:0; transform:translateX(-103%); background:linear-gradient(90deg,transparent,rgba(84,194,255,.12),transparent); transition:transform .45s ease; }
.nav-btn:hover::before { transform:translateX(103%); }
.nav-btn.active { box-shadow:inset 3px 0 var(--blue),0 0 24px rgba(61,153,225,.08); }
.topbar { position:relative; padding-bottom:20px; border-bottom:1px solid rgba(92,124,164,.16); }
.topbar::after { content:""; position:absolute; left:0; bottom:-1px; width:125px; height:1px; background:linear-gradient(90deg,var(--blue),transparent); box-shadow:0 0 10px var(--blue); }
.outline-button { transition:.2s ease; }.outline-button:hover { color:var(--blue); border-color:var(--blue); box-shadow:0 0 20px var(--cyan-glow); }
.primary-button { position:relative; overflow:hidden; transition:transform .2s,box-shadow .2s,filter .2s; }
.primary-button::after { content:""; position:absolute; inset:-30% -70%; transform:rotate(25deg) translateX(-70%); background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent); transition:transform .45s ease; }
.primary-button:hover::after { transform:rotate(25deg) translateX(82%); }
.primary-button:hover { box-shadow:0 0 30px var(--green-glow),0 10px 22px rgba(0,0,0,.2); }
.hero { isolation:isolate; background:linear-gradient(125deg,rgba(9,31,53,.98),rgba(11,70,100,.75)); border-color:rgba(73,177,242,.52); }
.hero::before { content:""; position:absolute; inset:0; z-index:-1; background:linear-gradient(105deg,transparent 45%,rgba(86,200,255,.08) 45.15%,transparent 45.35%); opacity:.75; }
.hero h2 { text-shadow:0 4px 30px rgba(0,0,0,.3); }.hero h2 strong { text-shadow:0 0 25px rgba(66,239,173,.35); }
.terminal-art { animation:terminalPulse 4s ease-in-out infinite; }
.metrics article,.panel,.task-card,.file-card,.schedule-card { border-color:rgba(77,102,138,.52); }
.metrics article { position:relative; overflow:hidden; }.metrics article::after { content:""; position:absolute; bottom:0; left:18px; right:18px; height:2px; background:linear-gradient(90deg,var(--blue),transparent); opacity:.55; }
.panel { box-shadow:0 22px 50px rgba(0,0,0,.17),inset 0 1px rgba(255,255,255,.025); }
.task-card,.file-card,.schedule-card { overflow:hidden; }.task-card::before,.file-card::before { content:""; position:absolute; left:0; top:0; bottom:0; width:2px; background:linear-gradient(var(--blue),transparent 65%); opacity:0; transition:opacity .2s; }.task-card:hover::before,.file-card:hover::before { opacity:1; }
.schedule-card { transition:.2s ease; }.schedule-card:hover { background:#142033; border-color:rgba(70,182,255,.7); transform:translateX(4px); box-shadow:0 10px 25px rgba(0,0,0,.18); }
.day-tab,.filter { transition:.18s ease; }.day-tab:hover,.filter:hover { color:#dff4ff; border-color:rgba(70,182,255,.65); transform:translateY(-1px); }
.day-tab.active,.filter.active { box-shadow:0 0 17px rgba(70,182,255,.16); }
.weekend-panel { position:relative; overflow:hidden; }.weekend-panel::before { content:""; position:absolute; inset:0; background:repeating-linear-gradient(135deg,transparent 0 16px,rgba(255,204,91,.022) 16px 17px); }.weekend-panel>div{position:relative}.weekend-panel .beer { animation:beerBob 2.6s ease-in-out infinite; }
.modal { background:linear-gradient(145deg,#142035,#0c121f); box-shadow:0 35px 80px #000b,0 0 0 1px rgba(97,193,255,.1); }
.modal-wrap.open .modal { animation:modalIn .22s ease-out; }
.search:focus-within { border-color:var(--blue); box-shadow:0 0 0 3px rgba(70,182,255,.1),0 0 24px rgba(70,182,255,.08); }
.file-icon { box-shadow:inset 0 0 18px rgba(70,182,255,.12); }.open-file:hover { background:rgba(66,239,173,.22); box-shadow:0 0 20px rgba(66,239,173,.12); }
@keyframes floatGlow { 50% { transform:translate(-8%,12%) scale(1.1); opacity:.7; } }
@keyframes terminalPulse { 50% { transform:translateY(-4px); filter:drop-shadow(0 0 15px rgba(70,182,255,.22)); } }
@keyframes beerBob { 50% { transform:translateY(-7px) rotate(-4deg); } }
@keyframes modalIn { from { opacity:0; transform:scale(.96) translateY(9px); } to { opacity:1; transform:none; } }
@media (prefers-reduced-motion: reduce) { *,*::before,*::after { animation-duration:.01ms!important; animation-iteration-count:1!important; transition-duration:.01ms!important; } }

.week-switch { display:flex; align-items:center; gap:7px; margin:-5px 0 17px; }
.week-switch > span { color:var(--muted); font:10px 'DM Mono'; letter-spacing:1px; margin-right:4px; }
.week-choice { border:1px solid var(--line); background:#101827; color:var(--muted); border-radius:7px; padding:9px 13px; font:700 12px Manrope; cursor:pointer; transition:.2s ease; }
.week-choice:hover { border-color:var(--blue); color:#e6f8ff; }
.week-choice.active { color:#06120e; background:var(--green); border-color:var(--green); box-shadow:0 0 20px rgba(66,239,173,.22); }
@media(max-width:610px) { .week-switch { gap:5px; } .week-choice { padding:8px 9px; font-size:11px; } }

/* --- Доповнення: наступна пара, прострочені завдання, дані, редагування --- */
.data-actions { display: grid; gap: 6px; margin: 18px 0 10px; }
.data-btn { background: transparent; border: 1px solid var(--line); color: var(--muted); border-radius: 7px; padding: 9px 10px; font: 700 11px 'DM Mono'; letter-spacing: .3px; cursor: pointer; text-align: left; transition: .2s ease; }
.data-btn:hover { color: #dff4ff; border-color: rgba(70,182,255,.6); }
@media (max-width: 900px) and (min-width: 611px) { .data-actions { display: none; } }

.next-lesson { display: flex; align-items: center; gap: 12px; margin: 18px 0; padding: 14px 18px; border-radius: 12px; background: linear-gradient(90deg, rgba(66,239,173,.10), rgba(70,182,255,.06)); border: 1px solid rgba(66,239,173,.35); }
.next-lesson b { color: var(--green); }
.next-lesson .when { margin-left: auto; font: 700 12px 'DM Mono'; color: var(--blue); }
.next-lesson .pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); flex: none; animation: nextPulse 1.6s ease-in-out infinite; }
@keyframes nextPulse { 50% { transform: scale(1.4); opacity: .6; } }

.deadline.overdue small, .task-card.overdue .task-meta span:nth-child(2) { color: #ff6f6f; }
.task-card.overdue { border-color: rgba(255,111,111,.45); }

.type.lab { color: #d9c4ff; background: rgba(173,141,255,.16); }

[data-edit-lesson], [data-edit-task], [data-edit-file] { cursor: pointer; }
.lesson-row[data-edit-lesson]:hover, .task-card[data-edit-task]:hover, .file-card[data-edit-file]:hover { outline: 1px solid rgba(70,182,255,.4); outline-offset: 2px; border-radius: 8px; }

.hint { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; }

#search-tasks { }
.page#tasks .search { margin-bottom: 17px; }

/* --- Автори, Підтримка, Донат --- */
.author-card { display: flex; gap: 18px; align-items: center; padding: 24px; }
.author-avatar { width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, var(--blue), var(--green)); color: #06120e; display: grid; place-items: center; font: 800 17px Manrope; flex: none; }
.author-card h3 { margin: 0 0 4px; font-size: 16px; letter-spacing: -.3px; }
.author-card p { margin: 0 0 14px; color: var(--muted); font-size: 12px; }
.author-card .primary-button { text-decoration: none; display: inline-block; }
@media (max-width: 610px) { .author-card { flex-direction: column; text-align: center; } }

.faq-list { display: grid; gap: 10px; margin-top: 4px; }
.faq-item { border: 1px solid var(--line); border-radius: 9px; padding: 13px 16px; background: #0d1522; }
.faq-item summary { cursor: pointer; font-weight: 700; font-size: 13px; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: "+  "; color: var(--blue); }
.faq-item[open] summary::before { content: "–  "; }
.faq-item p { margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.65; }

#support .panel { margin-bottom: 16px; }
#support .panel > p { color: var(--muted); font-size: 13px; margin: -6px 0 14px; }
.contact-links { display: flex; gap: 10px; flex-wrap: wrap; }
.contact-links .outline-button { text-decoration: none; display: inline-block; }

.donate-panel { border-color: rgba(255,195,108,.4); background: linear-gradient(135deg, rgba(255,195,108,.08), rgba(66,239,173,.05)); }
.donate-button { display: inline-flex; align-items: center; gap: 8px; margin-top: 4px; background: var(--orange); color: #1a1204; border: 1px solid var(--orange); border-radius: 8px; padding: 12px 18px; font: 800 13px Manrope; text-decoration: none; box-shadow: 0 0 22px rgba(255,195,108,.3); transition: .2s ease; }
.donate-button:hover { filter: brightness(1.08); transform: translateY(-1px); }

/* --- Таймер пар --- */
.pair-timer { margin: 18px 0; padding: 20px 22px; position: relative; overflow: hidden; border-color: rgba(70,182,255,.4); }
.pair-timer.active { border-color: rgba(66,239,173,.5); background: linear-gradient(125deg, rgba(66,239,173,.07), rgba(16,24,39,.85)); }
.pair-timer .timer-head { display: flex; align-items: center; gap: 9px; margin-bottom: 10px; }
.pair-timer .timer-head b { font: 700 11px 'DM Mono'; letter-spacing: .5px; color: var(--blue); text-transform: uppercase; }
.pair-timer.active .timer-head b { color: var(--green); }
.pair-timer .timer-head .type { margin-left: auto; }
.pair-timer .pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); flex: none; animation: nextPulse 1.6s ease-in-out infinite; }
.pair-timer h3 { font-size: 19px; letter-spacing: -.3px; margin-bottom: 4px; }
.pair-timer .timer-place { color: var(--muted); font-size: 12px; margin: 0 0 16px; }
.pair-timer .timer-bar { height: 8px; border-radius: 99px; background: #0d1520; border: 1px solid var(--line); overflow: hidden; margin-bottom: 14px; }
.pair-timer .timer-bar-fill { height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--blue), var(--green)); box-shadow: 0 0 14px rgba(66,239,173,.35); transition: width 1s linear; }
.pair-timer .timer-row { display: flex; align-items: baseline; justify-content: space-between; }
.pair-timer .timer-row span { font: 700 11px 'DM Mono'; color: var(--muted); letter-spacing: .3px; }
.pair-timer .timer-count { font: 800 26px 'DM Mono'; letter-spacing: .5px; color: var(--text); font-variant-numeric: tabular-nums; }
.pair-timer.active .timer-count { color: var(--green); text-shadow: 0 0 18px rgba(66,239,173,.3); }
.pair-timer .timer-empty { text-align: center; padding: 12px 0; color: var(--muted); }
.pair-timer .timer-empty span { display: block; color: var(--blue); font-size: 24px; margin-bottom: 8px; }
.pair-timer .timer-empty b { display: block; color: var(--text); margin-bottom: 4px; font-size: 14px; }
.pair-timer .timer-empty p { font-size: 12px; margin: 0; }
@media (max-width: 610px) { .pair-timer .timer-count { font-size: 21px; } }

/* --- Налаштування тривалості пари --- */
.duration-settings { margin-top: 18px; }
.duration-settings > p { color: var(--muted); font-size: 13px; margin: -4px 0 14px; line-height: 1.6; }
.duration-presets { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.duration-custom { max-width: 220px; }
.duration-custom span { display: block; font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.duration-custom input { width: 100%; background: #09111d; border: 1px solid #2d3b50; color: var(--text); border-radius: 7px; outline: 0; padding: 10px; font: 13px Manrope; }
.duration-custom input:focus { border-color: var(--blue); }

/* --- Синхронізація з календарем --- */
.calendar-sync { margin-top: 18px; }
.calendar-sync > p { color: var(--muted); font-size: 13px; margin: -4px 0 14px; line-height: 1.6; }
.calendar-sync-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.calendar-sync .hint { margin-top: 14px; line-height: 1.7; }
#share-format.week-switch { margin: 14px 0; }
.share-link-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.share-link-row #share-link-output { flex: 1 1 220px; background: #09111d; border: 1px solid #2d3b50; color: var(--text); border-radius: 7px; padding: 10px; font: 12px 'DM Mono'; outline: 0; }
.share-link-row #share-link-output:focus { border-color: var(--blue); }
.schedule-import { margin-top: 18px; }
.schedule-import > p { color: var(--muted); font-size: 13px; margin: -4px 0 14px; line-height: 1.6; }
.import-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.import-row input { flex: 1 1 220px; background: #09111d; border: 1px solid #2d3b50; color: var(--text); border-radius: 7px; padding: 10px; font: 13px Manrope; outline: 0; }
.import-row input:focus { border-color: var(--blue); }
.outline-button:disabled, .data-btn:disabled { opacity: .4; cursor: not-allowed; filter: none; }
.outline-button:disabled:hover { color: #b9c8dd; border-color: #31425b; box-shadow: none; }
#logo-home-link { cursor: pointer; }

/* --- Друк розкладу (Експорт у PDF: через системний друк "Зберегти як PDF") --- */
.print-only { display: none; }
@media print {
  body.printing-schedule > *:not(#print-schedule-root) { display: none !important; }
  body.printing-schedule #print-schedule-root { display: block !important; background: #fff; color: #111; padding: 0; font-family: Arial, Helvetica, sans-serif; }
  #print-schedule-root h1 { font-size: 20px; margin: 0 0 4px; }
  #print-schedule-root .print-sub { font-size: 12px; color: #555; margin: 0 0 18px; }
  #print-schedule-root h2 { font-size: 14px; margin: 18px 0 8px; break-after: avoid; }
  #print-schedule-root table { width: 100%; border-collapse: collapse; margin-bottom: 6px; }
  #print-schedule-root th, #print-schedule-root td { border: 1px solid #999; padding: 5px 8px; font-size: 11px; text-align: left; vertical-align: top; }
  #print-schedule-root th { background: #eee; }
}

/* --- Графік навчального процесу --- */
.academic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.academic-group { border-radius: 12px; padding: 21px; }
.academic-group .panel-title { padding-bottom: 12px; margin-bottom: 4px; border-bottom: 1px solid #263347; display: flex; align-items: center; gap: 12px; }
.academic-group .group-icon { width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; font: 16px 'DM Mono'; flex: none; }
.academic-group h3 { margin: 0; font-size: 15px; letter-spacing: -.3px; }
.academic-item { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 12px 0; border-bottom: 1px solid #263347; }
.academic-item:last-child { border-bottom: 0; }
.academic-item b { font-size: 13px; font-weight: 700; }
.academic-item span { font: 700 11px 'DM Mono'; color: var(--blue); text-align: right; white-space: nowrap; }
.academic-item p { grid-column: 1/-1; margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.academic-empty { grid-column: 1/-1; text-align: center; border: 1px dashed #354258; border-radius: 12px; padding: 40px 28px; color: var(--muted); }
.academic-empty span { display: block; color: var(--blue); font-size: 30px; }
.academic-empty b { display: block; color: var(--text); margin: 10px 0 6px; font-size: 15px; }
.academic-empty p { font-size: 12px; max-width: 440px; margin: 0 auto; line-height: 1.7; }
@media (max-width: 900px) { .academic-grid { grid-template-columns: 1fr; } }
.academic-table-wrap { padding: 21px; }
.academic-table-wrap .panel-title { padding-bottom: 14px; margin-bottom: 4px; }
.academic-scroll { overflow-x: auto; border-radius: 10px; border: 1px solid var(--line); }
.academic-table { width: 100%; border-collapse: collapse; min-width: 980px; font-size: 12px; }
.academic-table th { background: #101827; color: var(--blue); text-align: left; font: 700 10px 'DM Mono'; letter-spacing: .4px; padding: 12px 13px; border-bottom: 1px solid var(--line); white-space: nowrap; position: sticky; top: 0; }
.academic-table td { padding: 12px 13px; border-bottom: 1px solid #1b2635; color: var(--text); white-space: nowrap; }
.academic-table tbody tr:last-child td { border-bottom: 0; }
.academic-table tbody tr:hover td { background: #101c2c; }
.academic-table .course-cell { font: 800 15px 'DM Mono'; color: var(--green); text-align: center; background: #0d1520; white-space: nowrap; }
.academic-table .groups-cell { font-weight: 700; color: #dce8f7; white-space: normal; min-width: 150px; }
.academic-source { margin-top: 14px; }
@media (max-width: 610px) { .academic-table-wrap { padding: 15px; } }