:root{
  --green:#1D9E75; --green-bg:#E1F5EE; --green-dark:#0F6E56;
  --purple:#534AB7; --purple-bg:#EEEDFE; --purple-dark:#3C3489;
  --bg:#F4F5F7; --card:#FFFFFF; --border:#E4E6EA;
  --text:#1B1D21; --muted:#7A8088; --warn-bg:#FEF9F0; --warn-bd:#F4E5C8; --warn:#8A6A1F;
}
*{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,'Segoe UI',Roboto,sans-serif}
body{background:var(--bg);color:var(--text);height:100dvh;overflow:hidden}
.hidden{display:none!important}
.muted{color:var(--muted);font-size:13px;line-height:1.5}

/* PIN */
.pin-screen{height:100dvh;display:flex;align-items:center;justify-content:center;background:var(--bg);overflow-y:auto}
.hero{width:100%;max-width:400px;padding:24px;text-align:center}
.hero-badge{font-size:56px;line-height:1;margin-bottom:10px}
.hero h1{font-size:26px;font-weight:700;letter-spacing:-.5px}
.hero h1 span{color:var(--green)}
.hero-sub{font-size:14px;color:var(--muted);margin-bottom:20px}
.hero-features{display:flex;flex-direction:column;gap:10px;text-align:left;margin-bottom:20px}
.hero-features .f{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:11px 13px}
.hero-features .f>span{font-size:22px;display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--green-bg);flex-shrink:0}
.hero-features .f>span img{width:34px;height:34px;object-fit:contain}
.hero-features .f b{font-size:14px;display:block}
.hero-features .f small{font-size:12px;color:var(--muted)}
.pin-label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px;text-align:left}
.hero-foot{font-size:11px;color:var(--muted);margin-top:18px}
.pin-box{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:20px;text-align:left}
.pin-box input{width:100%;padding:12px;border:1px solid var(--border);border-radius:12px;font-size:16px;text-align:center;margin-bottom:10px}
.pin-error{color:#C0392B;font-size:13px;margin-top:8px;min-height:16px;text-align:center}
.pin-box .btn{margin-top:2px}

/* Каркас */
.app{height:100dvh;display:flex;flex-direction:column;max-width:520px;margin:0 auto;background:var(--bg)}
.my-data-btn{position:fixed;top:14px;right:16px;z-index:20;width:40px;height:40px;border-radius:50%;border:none;background:var(--purple);color:#fff;font-size:18px;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.2);display:flex;align-items:center;justify-content:center}
.mybtn{border:1px solid var(--border);background:var(--bg);color:var(--muted);font-size:11px;padding:4px 8px;border-radius:8px;cursor:pointer;white-space:nowrap;flex-shrink:0}
.my-data-btn:active{transform:scale(.95)}
.tab{flex:1;display:flex;flex-direction:column;overflow-y:auto}
.tab-split{overflow:hidden;min-height:0}  /* тренер: программа закреплена, чат отдельно */
.tab-split .program{max-height:100%;overflow-y:auto;flex-shrink:0;min-height:0}
.tab-split .chat{flex:1;overflow-y:auto;min-height:0}
.tr-seg{display:flex;gap:6px;padding:8px 14px;background:var(--card);border-bottom:1px solid var(--border);flex-shrink:0}
.seg-btn{flex:1;padding:8px;border:1px solid var(--border);border-radius:12px;background:var(--bg);color:var(--muted);font-size:13px;cursor:pointer;font-weight:500}
.seg-btn.on{background:var(--purple);border-color:var(--purple);color:#fff}
.tr-pane{flex:1;display:flex;flex-direction:column;min-height:0}
.tr-back-wrap{position:sticky;top:0;z-index:5;padding:8px 14px;background:var(--bg)}
.tr-back{width:100%;padding:8px;border:1px solid var(--border);border-radius:12px;background:var(--card);color:var(--purple-dark);font-size:13px;font-weight:600;cursor:pointer}
@media (prefers-color-scheme: dark){.tr-back{color:var(--purple-dark)}}
.topbar{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--card);border-bottom:1px solid var(--border);flex-shrink:0}
.topbar b{font-size:15px;display:block}
.topbar small{font-size:12px;color:var(--muted)}
.topbar>div:nth-child(2){flex:1}
.avatar{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover}
.av-green{background:var(--green-bg)} .av-purple{background:var(--purple-bg)} .av-gray{background:#EDEEF1}
.badge{font-size:11px;padding:3px 9px;border-radius:10px;background:var(--purple-bg);color:var(--purple-dark);white-space:nowrap}

/* Панель КБЖУ */
.kbju{background:var(--card);border-bottom:1px solid var(--border);padding:10px 14px}
.kbju-row{display:flex;justify-content:space-between;font-size:13px;margin-bottom:6px}
.kbju-row b{color:var(--green-dark)}
.bar{height:6px;border-radius:3px;background:var(--bg);overflow:hidden;margin-bottom:6px}
.bar-fill{height:6px;background:var(--green);border-radius:3px;width:0;transition:width .4s}
.kbju-macros{display:flex;gap:14px;font-size:12px;color:var(--muted)}
.kbju-macros b{color:var(--text);font-weight:500}

/* Дневник питания */
.diary-week{display:flex;gap:6px;padding:10px 14px;overflow-x:auto}
.dw-day{flex:1;min-width:46px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 4px;border:1px solid var(--border);border-radius:12px;background:var(--card);cursor:pointer}
.dw-day b{font-size:11px;color:var(--muted);text-transform:capitalize}
.dw-day small{font-size:10px;color:var(--muted)}
.dw-day em{font-size:11px;color:var(--green-dark);font-style:normal;font-weight:600}
.dw-day.today{border-color:var(--green)}
.dw-day.sel{background:var(--green);border-color:var(--green)}
.dw-day.sel b,.dw-day.sel small,.dw-day.sel em{color:#fff}
.diary-body{padding:0 14px}
.diary-title{font-size:13px;font-weight:600;margin-bottom:8px;color:var(--text)}
.diary-title b{color:var(--muted);font-weight:500}
.diary-item{display:flex;justify-content:space-between;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:8px 11px;margin-bottom:6px;font-size:13px}
.diary-item b{font-size:12px;color:var(--green-dark);white-space:nowrap}
.diary-total{display:flex;justify-content:space-between;margin-top:8px;padding:9px 12px;background:var(--purple-bg);border-radius:10px;font-size:12px;color:var(--muted)}
.diary-total b{color:var(--purple-dark)}

/* Чат */
.chat{flex:1;padding:12px 14px;display:flex;flex-direction:column;gap:8px}
.msg{max-width:86%;padding:9px 12px;border-radius:14px;font-size:14px;line-height:1.5;word-break:break-word;white-space:normal}
.msg.user{align-self:flex-end;border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:var(--card);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.user.g{background:var(--green-bg);color:var(--green-dark)}
.msg.user.p{background:var(--purple-bg);color:var(--purple-dark)}
.msg.user.n{background:#EDEEF1;color:var(--text)}
.msg.typing{color:var(--muted);font-style:italic}
.msg img{max-width:100%;border-radius:10px;display:block}
.msg ul{list-style:disc;padding-left:18px;margin:4px 0}
.msg li{margin:2px 0}
.msg code{background:rgba(0,0,0,.06);padding:1px 5px;border-radius:5px;font-size:13px}
.msg b{font-weight:600}

/* Строка ввода */
.inputbar{display:flex;gap:8px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:var(--card);border-top:1px solid var(--border)}
.inputbar input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:20px;font-size:15px;outline:none}
.chat-input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:20px;font-size:15px;outline:none;resize:none;overflow:hidden;min-height:42px;max-height:120px;line-height:1.4;font-family:inherit;background:var(--card);color:var(--text);word-break:break-word;white-space:pre-wrap}
.send,.cam{width:40px;height:40px;border-radius:50%;border:none;font-size:16px;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}
.btn-green{background:var(--green)} .btn-purple{background:var(--purple)} .btn-gray{background:#6B7280}

/* Программа тренера */
.program{padding:10px 14px 0;max-height:none;overflow:visible;flex-shrink:0}
.pcard{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:12px;margin-bottom:8px}
.pcard h3{font-size:14px;margin-bottom:8px;display:flex;justify-content:space-between}
.pcard h3 small{color:var(--muted);font-weight:400}
.prog-head{display:flex;justify-content:space-between;align-items:center;cursor:pointer;user-select:none}
.prog-head h3{margin-bottom:0}
.prog-toggle{color:var(--purple);font-size:12px;white-space:nowrap}
.prog-list{display:block}
.ex{border:1px solid var(--border);border-radius:10px;padding:9px 10px;margin-bottom:7px}
.ex-head{display:flex;justify-content:space-between;align-items:center;font-size:13px}
.ex-anim{width:52px;height:52px;border-radius:12px;background:#0F2F1F;padding:4px;flex-shrink:0}
.ex-head span:last-child{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:5px;margin-top:6px}
.chip{font-size:11px;padding:2px 8px;border-radius:10px;background:var(--purple-bg);color:var(--purple-dark)}
.chip-link{font-size:11px;color:var(--purple);text-decoration:none}
.chip-tech{font-size:11px;color:var(--purple-dark);background:var(--purple-bg);border:none;border-radius:10px;padding:2px 8px;cursor:pointer;font-weight:600}
.chip-warn{font-size:11px;color:var(--warn);background:none;border:none;cursor:pointer}
.chip-alt{font-size:11px;color:var(--green-dark);background:none;border:none;cursor:pointer;font-weight:600}
.chip-alt:disabled,.alt-btn:disabled{color:var(--muted);cursor:default;opacity:.6}
.alt-list{margin-top:7px;background:var(--green-bg);border:1px solid var(--green);border-radius:8px;padding:8px 10px;font-size:12px;line-height:1.5;display:flex;flex-direction:column;gap:5px}
.alt-list b{color:var(--green-dark);font-size:11px}
.alt-btn{border:1px solid var(--border);background:var(--card);border-radius:8px;padding:6px 10px;font-size:12px;text-align:left;cursor:pointer;color:var(--text)}
.alt-btn:active{background:var(--green-bg)}
.alt-btn.alt-active{border-color:var(--green);background:var(--green-bg);font-weight:600;color:var(--green-dark)}
.ex.replaced{border-color:var(--green)}
.mistakes{margin-top:7px;background:var(--warn-bg);border:1px solid var(--warn-bd);border-radius:8px;padding:8px 10px;font-size:12px;line-height:1.5}
.mistakes b{color:var(--warn);font-size:11px;display:block;margin-bottom:3px}
.btn{border:none;border-radius:10px;padding:10px 14px;font-size:13px;color:#fff;cursor:pointer;width:100%}
.btn.small{width:auto;padding:8px 12px}
.day-nav{display:flex;gap:6px;margin-bottom:8px;overflow-x:auto}
.day-nav button{border:1px solid var(--border);background:var(--card);border-radius:10px;padding:6px 12px;font-size:12px;white-space:nowrap;cursor:pointer}
.day-nav button.on{background:var(--purple-bg);border-color:var(--purple);color:var(--purple-dark)}

/* Прогресс */
.progress-body{flex:1;overflow-y:auto;padding:12px 14px;display:flex;flex-direction:column;gap:10px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:12px}
.card-title{display:flex;justify-content:space-between;font-size:14px;margin-bottom:10px}
.card-title b{color:var(--green-dark);font-size:13px}
.chart{display:flex;align-items:flex-end;gap:5px;height:90px}
.chart .col{flex:1;background:var(--green);opacity:.75;border-radius:4px 4px 0 0;position:relative;min-height:6px}
.chart .col small{position:absolute;top:-16px;left:0;right:0;text-align:center;font-size:9px;color:var(--muted)}
.measure-row{display:flex;gap:8px}
.measure-row input{flex:1;padding:10px;border:1px solid var(--border);border-radius:10px;font-size:14px;min-width:0}
.measure-row .btn{width:48px}

/* Нижняя навигация */
.tabbar{display:grid;grid-template-columns:repeat(3,1fr);background:var(--card);border-top:1px solid var(--border);padding:6px 4px calc(8px + env(safe-area-inset-bottom))}
.tabbtn{border:none;background:none;font-size:11px;color:var(--muted);cursor:pointer;padding:4px 0}
.tabbtn span{display:block;font-size:20px;margin-bottom:2px;filter:grayscale(1);opacity:.6}
.tabbtn span img{width:22px;height:22px;object-fit:contain;vertical-align:middle}
.tabbtn.on{color:var(--green-dark);font-weight:500}
.tabbtn.on span{filter:none;opacity:1}
.hero-logo{width:92px;height:92px;border-radius:22px;margin-bottom:10px;box-shadow:0 4px 16px rgba(0,0,0,.18)}
.tabbtn.on.purple{color:var(--purple-dark)}

/* Профиль: редактируемая форма */
.profile-form{flex:1;display:flex;flex-direction:column;overflow-y:auto}
.profile-body{flex:1;overflow-y:auto;padding:12px 14px;display:flex;flex-direction:column;gap:9px}
.pf-sec-title{font-size:13px;font-weight:700;color:var(--text);margin:6px 0 2px;padding-top:8px;border-top:1px solid var(--border)}
.pf-field{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted)}
.pf-field input,.pf-field select,.pf-field textarea{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;
  font-size:14px;font-family:inherit;background:var(--card);color:var(--text);outline:none;resize:vertical}
.pf-field select{appearance:auto}
.pf-check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text);padding:2px 0}
.pf-check input{width:18px;height:18px;accent-color:var(--green)}
.pf-msg{font-size:13px;text-align:center;min-height:16px;padding-top:4px}

/* ---------- Тёмная тема (авто, по системной настройке телефона) ---------- */
@media (prefers-color-scheme: dark) {
  :root{
    --bg:#0F1115; --card:#1A1D23; --border:#2A2E37;
    --text:#E7E9EE; --muted:#8A9099;
    --green:#2BB894; --green-bg:#12312A; --green-dark:#5BD0B0;
    --purple:#6C63D6; --purple-bg:#1E1B38; --purple-dark:#A79FF0;
    --warn-bg:#221C10; --warn-bd:#3A3018; --warn:#D8B95C;
  }
  body{background:var(--bg);color:var(--text)}
  .msg.bot{background:var(--card);border-color:var(--border)}
  .msg.user.g{background:var(--green-bg);color:var(--green-dark)}
  .msg.user.p{background:var(--purple-bg);color:var(--purple-dark)}
  .msg.user.n{background:#23262E;color:var(--text)}
  .topbar,.inputbar,.tabbar{background:var(--card);border-color:var(--border)}
  .kbju,.pcard,.card,.ex,.pin-box{background:var(--card);border-color:var(--border)}
  .pcard h3 small,.kbju-macros,.muted{color:var(--muted)}
  .day-nav button{background:var(--card);border-color:var(--border);color:var(--text)}
  .measure-row input,.inputbar input,.pin-box input,.chat-input{background:var(--card);border-color:var(--border);color:var(--text)}
  .chip{background:var(--purple-bg);color:var(--purple-dark)}
  .badge{background:var(--purple-bg);color:var(--purple-dark)}
  .mistakes{background:var(--warn-bg);border-color:var(--warn-bd)}
  .mistakes b{color:var(--warn)}
  .chart .col{background:var(--green)}
  .tabbtn.on{color:var(--green-dark)}
  .tabbtn.on span{filter:none;opacity:1}
  .av-green{background:var(--green-bg)} .av-purple{background:var(--purple-bg)} .av-gray{background:#23262E}
}