/* =====================================================================
   ВИМОВА БЕЗ СЕКРЕТІВ: стилі
   ===================================================================== */
:root{
  --moss:#66805c;        /* заставка, шапка, основні кнопки */
  --moss-deep:#4f6647;   /* наведення, рамки кнопок */
  --sage:#cbd1bd;        /* бокова панель, фон вправ */
  --paper:#ede6dc;       /* основний фон */
  --cell:#a9b89e;        /* активний стан, виділення в таблиці */
  --ink:#363636;         /* текст, лінії */
  --white:#f6f8f5;       /* поля, картки */
  --ink-soft:#5b5b55;
  --cover:#728c69;       /* зелений із заставки */
  --error:#8a2d1f;
  --line:1.5px solid var(--ink);
  --serif:"Gentium Book Plus","Gentium Plus",Georgia,"Times New Roman",serif;
  --cell-size:40px;      /* квадратики з номерами й стрілками */
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*,*::before,*::after{box-sizing:inherit}
html,body{margin:0}
body{min-height:100vh;display:flex;flex-direction:column;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
body > main, body > .layout{flex:1}
h1,h2,h3{font-weight:700;letter-spacing:-0.02em;line-height:1.15;margin:0}
p{margin:0}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;cursor:pointer}
a{color:inherit}
:focus-visible{outline:3px solid var(--moss-deep);outline-offset:3px}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.lock{width:.85em;height:.85em;flex:none;vertical-align:-.05em}

/* ---------- Кнопки ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:var(--line);background:var(--white);padding:12px 20px;border-radius:2px;font-weight:700;text-decoration:none;transition:background .15s}
.btn:hover{background:var(--sage)}
.btn-primary{background:var(--moss);color:var(--white);border-color:var(--moss-deep)}
.btn-primary:hover{background:var(--moss-deep)}
.square{display:grid;place-items:center;width:var(--cell-size);height:var(--cell-size);flex:none;border:var(--line);background:var(--paper);border-radius:0;padding:0;font-size:20px;line-height:1;font-weight:700}
.square:hover{background:var(--cell)}

/* ---------- Шапка ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px clamp(16px,3vw,28px);background:var(--moss);color:var(--white)}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.home{display:block;width:44px;height:44px;flex:none;border:1.5px solid var(--moss-deep);background:var(--paper);overflow:hidden;transition:transform .15s,box-shadow .15s}
.home img{width:100%;height:100%;object-fit:cover}
.home:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--moss-deep)}
.brand-name{font-weight:700;font-size:22px;letter-spacing:-0.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user{display:flex;align-items:center;gap:14px;font-size:15px}
.user button{background:none;border:1px solid rgba(246,248,245,.6);color:var(--white);padding:5px 12px;border-radius:2px}
.user button:hover{background:rgba(255,255,255,.12)}

/* ---------- Вхід ---------- */
.login{min-height:100vh;min-height:100svh;display:grid;grid-template-columns:1.6fr 1fr}
/* Картинка закріплена за лівим краєм і низом: назва курсу видна завжди */
.login-cover{background:var(--cover) url("assets/cover.jpg") left bottom / contain no-repeat;min-height:240px}
.login-form{display:flex;flex-direction:column;justify-content:center;padding:48px clamp(24px,5vw,72px);background:var(--paper)}
.login-form h1{font-size:clamp(32px,3.6vw,46px);margin-bottom:10px}
.login-form > p{margin:0 0 30px;color:var(--ink-soft)}
.field{display:block;margin-bottom:18px}
.field span{display:block;font-size:15px;margin-bottom:6px}
.field input{width:100%;font:inherit;padding:12px 14px;border:var(--line);border-radius:2px;background:var(--white);color:var(--ink)}
.field input:focus{outline:none;border-color:var(--moss);box-shadow:0 0 0 3px rgba(102,128,92,.25)}
.login-form .btn{width:100%;margin-top:8px;font-size:19px}
.login-note{margin-top:20px!important;font-size:14px;font-style:italic;color:var(--ink-soft)}
.error{color:var(--error);font-size:15px;min-height:1.5em}

/* ---------- Таблиця IPA ---------- */
.chart{container-type:inline-size;width:100%}
.chart-grid{display:grid;border:var(--line);background:var(--white)}
.chart-vowels{grid-template-columns:repeat(7,1fr)}
.chart-cons{grid-template-columns:repeat(8,1fr);border-top:0}
.chart-grid > span{display:grid;place-items:center;height:calc(100cqi / 8 * .92);font-size:calc(100cqi / 8 * .42);line-height:1;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);white-space:nowrap}
.chart-vowels > span:nth-child(7n),.chart-cons > span:nth-child(8n){border-right:0}
.chart-vowels > span:nth-child(7n+5){border-left:2px solid var(--ink)}           /* межа монотонги | дифтонги */
.chart-vowels > span:nth-last-child(-n+7){border-bottom:3px solid var(--ink)}    /* межа голосні | приголосні */
.chart-cons > span:nth-last-child(-n+8){border-bottom:0}
.chart-grid > span.empty{background:var(--paper)}
.chart-grid > span.hl{background:var(--cell)}
.chart.dim .chart-grid > span:not(.hl):not(.empty){color:#8d8d86}

/* ---------- Головна ---------- */
.home-page{width:100%;max-width:960px;margin:0 auto;padding:40px clamp(18px,4vw,40px) 72px}
.hero-logo{width:min(560px,100%);height:auto;margin:0 auto 36px}
.home-chart{margin-bottom:64px}
.block{margin-bottom:64px}
.block-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:18px}
.block-head h2{font-size:clamp(28px,3.4vw,36px)}
.block-head p{color:var(--ink-soft)}

.units{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);border:var(--line);background:var(--white)}
.units li{border-right:1px solid var(--ink)}
.units li:last-child{border-right:0}
.unit{display:flex;flex-direction:column;gap:14px;height:100%;min-height:150px;padding:16px;text-decoration:none;transition:background .15s}
a.unit:hover{background:var(--sage)}
.unit .square{font-size:17px;width:36px;height:36px}
.unit strong{font-size:21px;letter-spacing:-0.02em;line-height:1.15}
.unit small{margin-top:auto;font-size:14px;color:var(--ink-soft);display:flex;align-items:center;gap:6px}
.unit.is-done .square{background:var(--moss);color:var(--white);border-color:var(--moss-deep)}
.unit.is-next{background:var(--cell)}
.unit.is-next small{color:var(--ink)}
a.unit.is-next:hover{background:#9aab8e}
.unit.is-locked{background:var(--paper);color:var(--ink-soft);cursor:default}
.unit.is-locked .square{color:var(--ink-soft)}

.res-group + .res-group{margin-top:26px}
.res-group h3{font-size:20px;margin-bottom:12px}
.res-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.res{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border:var(--line);background:var(--white);text-decoration:none;transition:transform .15s,box-shadow .15s,background .15s}
a.res:hover{background:var(--sage);transform:translate(-3px,-3px);box-shadow:5px 5px 0 var(--ink)}
.res-mark{display:grid;place-items:center;width:44px;height:44px;flex:none;border:var(--line);background:var(--paper);font-size:22px;font-weight:700}
a.res .res-mark{background:var(--cell)}
.res-text strong{display:block;font-size:19px;line-height:1.25}
.res-text > span{display:block;font-size:14px;color:var(--ink-soft);margin-top:4px}
.res.is-locked{background:var(--paper);border-style:dashed;color:var(--ink-soft)}
.res.is-locked .res-mark{background:var(--paper);color:var(--ink-soft)}
.res.is-locked .res-mark .lock{width:20px;height:20px}

/* ---------- Сторінка уроку ---------- */
.layout{display:grid;grid-template-columns:280px 1fr;align-items:stretch}
.layout > *{min-width:0}
.sidebar{background:var(--sage);border-right:var(--line)}
.sidebar-inner{position:sticky;top:0;padding:24px 18px}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 4px 10px}
.sidebar h2{font-size:18px}
.progress-text{font-size:14px;color:var(--ink-soft);margin:0 0 16px 10px}
.sections{list-style:none;margin:0;padding:0}
.sections .sec{width:100%;display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;text-align:left;background:none;border:none;padding:9px 10px;border-radius:2px;font-size:18px;text-decoration:none}
.sections .num{display:grid;place-items:center;width:34px;height:34px;border:var(--line);background:var(--paper);font-weight:700;font-size:16px}
.sections a.sec:hover{background:rgba(255,255,255,.35)}
.sections .sec[aria-current="page"]{background:var(--paper);font-weight:700}
.sections .sec[aria-current="page"] .num{background:var(--cell)}
.sections .is-done .num{background:var(--moss);color:var(--white);border-color:var(--moss-deep)}
.sections .is-locked{color:var(--ink-soft);cursor:default}
.sections .is-locked .num{color:var(--ink-soft)}

/* згорнута панель: лишається лише квадратик зі стрілкою */
.layout.collapsed{grid-template-columns:76px 1fr}
.layout.collapsed .sidebar-inner{padding:24px 18px}
.layout.collapsed .sidebar-head{margin:0}
.layout.collapsed .sidebar h2,.layout.collapsed .progress-text,.layout.collapsed .sections{display:none}

.lesson{padding:36px clamp(18px,4vw,56px) 64px;max-width:1120px;width:100%;min-width:0}
.lesson-head{margin-bottom:22px}
.lesson-head h1{font-size:clamp(34px,4.4vw,54px)}
.lesson-head p{margin-top:8px;color:var(--ink-soft)}

.player{position:relative;aspect-ratio:16/9;background:var(--moss-deep);border:var(--line);overflow:hidden}
.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.player .placeholder{position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:24px;background:var(--cover) url("assets/cover.jpg") left bottom / contain no-repeat}
.player .placeholder span{background:var(--paper);border:var(--line);padding:12px 18px;max-width:34ch}

.tasks{display:grid;grid-template-columns:repeat(var(--n,2),1fr);gap:16px;margin-top:22px}
.task{display:flex;flex-direction:column;justify-content:space-between;gap:16px;min-height:150px;padding:20px 22px;background:var(--sage);border:var(--line);border-radius:0;text-align:left;text-decoration:none;transition:transform .15s,box-shadow .15s}
.task:hover{transform:translate(-3px,-3px);box-shadow:6px 6px 0 var(--ink)}
.task .kind{display:block;font-size:15px;color:var(--ink-soft)}
.task strong{display:block;font-size:28px;letter-spacing:-0.02em;line-height:1.1}
.chain{display:flex;gap:6px;flex-wrap:wrap}
.chain b{display:grid;place-items:center;min-width:40px;height:40px;padding:0 6px;border:var(--line);background:var(--paper);font-size:21px;font-weight:400}
.chain b.on{background:var(--cell)}

.materials{margin-top:44px}
.materials h2,.finish h2{font-size:26px;margin-bottom:16px}
.materials-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;align-items:start}
.materials-links{display:flex;flex-direction:column;gap:12px}
.mat{display:block;padding:14px 16px;border:var(--line);background:var(--white);text-decoration:none;transition:background .15s}
.mat:hover{background:var(--sage)}
.mat strong{display:block;font-size:18px;line-height:1.3}
.mat span{display:block;font-size:14px;color:var(--ink-soft)}
.chart-caption{font-size:14px;color:var(--ink-soft);margin-top:8px}

.finish{margin-top:48px;padding-top:28px;border-top:var(--line)}
.finish-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.finish .btn{font-size:19px;padding:14px 24px}
.finish-note{margin-top:12px;font-size:15px;color:var(--ink-soft)}
.btn-done[aria-pressed="true"]{background:var(--white);color:var(--ink);border-color:var(--ink)}
.btn-done[aria-pressed="true"] .tick{display:grid;place-items:center;width:24px;height:24px;background:var(--moss);color:var(--white);border:1.5px solid var(--moss-deep);font-size:15px}
.btn-done[disabled]{cursor:default}
.btn-done[disabled]:hover{background:var(--white)}

.locked-box{max-width:560px;margin:40px 0;padding:28px;border:var(--line);background:var(--white)}
.locked-box h1{font-size:clamp(30px,4vw,42px);display:flex;align-items:center;gap:14px;margin-bottom:12px}
.locked-box p{margin-bottom:22px;color:var(--ink-soft)}

/* ---------- Вікно вправи ---------- */
.scrim{position:fixed;inset:0;background:rgba(54,54,54,.45);z-index:20}
.modal{position:fixed;inset:0;z-index:21;display:grid;place-items:center;padding:calc(env(safe-area-inset-top,0px) + 16px) 16px calc(env(safe-area-inset-bottom,0px) + 16px)}
.modal-box{background:var(--paper);border:var(--line);width:min(560px,100%);padding:26px;max-height:100%;overflow-y:auto}
.modal-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}
.modal-head h2{font-size:28px}
.quiz-symbol{display:grid;place-items:center;height:150px;margin-bottom:18px;font-size:96px;line-height:1;background:var(--white);border:var(--line)}
.quiz-q{text-align:center;margin:0 0 16px;font-size:20px}
.quiz-btns{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.quiz-btns .btn{padding:16px;font-size:19px}
.quiz-feedback{min-height:3.2em;margin:16px 0 4px;text-align:center}
.quiz-feedback.ok{color:var(--moss-deep)}
.quiz-feedback.no{color:var(--error)}
.quiz-meta{display:flex;justify-content:space-between;font-size:15px;color:var(--ink-soft)}

/* ---------- Футер ---------- */
.footer{background:var(--sage);border-top:var(--line);padding:28px clamp(18px,4vw,40px) 32px;font-size:16px}
.footer-inner{max-width:1120px;margin:0 auto;display:flex;flex-wrap:wrap;gap:20px 40px;align-items:center;justify-content:space-between}
.footer-brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:-0.02em}
.footer-brand img{width:36px;height:36px;border:var(--line)}
.contacts{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 22px}
.contacts span{color:var(--ink-soft);margin-right:6px}
.contacts a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.contacts a:hover{color:var(--moss-deep)}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 18px;width:100%;font-size:14px}
.footer-links:empty{display:none}
.footer .btn{padding:9px 16px;font-size:16px}

/* ---------- Телефон і вузькі екрани ---------- */
@media (max-width:860px){
  .login{grid-template-columns:1fr;grid-template-rows:auto 1fr;min-height:0}
  .login-cover{aspect-ratio:16/9;min-height:0}
  .layout,.layout.collapsed{grid-template-columns:1fr}
  .sidebar{border-right:0;border-bottom:var(--line)}
  .sidebar-inner{position:static;padding:12px;overflow-x:auto;scrollbar-width:thin}
  .sidebar-head,.progress-text{display:none!important}
  .layout.collapsed .sections,.sections{display:flex!important;gap:6px;width:max-content}
  .sections .sec{grid-template-columns:28px auto auto;font-size:16px;padding:7px 10px;white-space:nowrap}
  .sections .num{width:28px;height:28px;font-size:14px}
  .units{grid-template-columns:1fr}
  .units li{border-right:0;border-bottom:1px solid var(--ink)}
  .units li:last-child{border-bottom:0}
  .unit{flex-direction:row;align-items:center;min-height:0;padding:12px 14px}
  .unit small{margin:0 0 0 auto;text-align:right}
  .materials-grid{grid-template-columns:1fr}
  .user .email{display:none}
}
@media (max-width:560px){
  body{font-size:17px}
  .brand-name{font-size:19px}
  .home{width:38px;height:38px}
  .tasks{gap:10px}
  .task{padding:14px;min-height:120px;gap:12px}
  .task .kind{font-size:13px}
  .task strong{font-size:20px}
  .chain{gap:4px}
  .chain b{min-width:28px;height:28px;font-size:16px;padding:0 4px}
  .finish .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media (min-width:861px){
  .pre-collapsed .layout{grid-template-columns:76px 1fr}
  .pre-collapsed .sidebar h2,.pre-collapsed .progress-text,.pre-collapsed .sections{display:none}
}