/* 体重日记 · 样式
   手机单栏：顶栏 → 我 / Ta → 今天称重 → 本月图表 → 四个数字 → 早上提醒 → 本月记录。
   「我」是蓝色，「Ta」是粉色；切到 Ta 时 body 加 who-ta，整页的强调色跟着换。 */
:root{
  --bg:#FFF8F0; --surface:#FFFFFF; --surface-2:#FBF0E3; --line:#F0E1CF; --grid:#F3E8DC;
  --ink:#4A3B33; --ink-2:#7A6A60; --ink-3:#A8968A;
  --btn:#4A3B33; --btn-ink:#FFF8F0;
  --me:#6F9DD6; --me-ink:#35679F; --me-soft:#E4EEFA;
  --ta:#E07A98; --ta-ink:#B0466A; --ta-soft:#FDE6ED;
  --down:#3F8A68; --down-soft:#DDF1E6; --up:#A55A33; --up-soft:#FCE6D8;
  --future:rgba(240,225,207,.35);
  --overlay:rgba(74,52,38,.42);
  --shadow:0 1px 2px rgba(120,82,50,.06),0 8px 24px -12px rgba(120,82,50,.22);
  --shadow-up:0 -10px 40px -16px rgba(60,36,20,.35);
  --font-display:"ZCOOL KuaiLe","Nunito","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Nunito","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --r-lg:26px; --r-md:18px;
  --c:var(--me); --ci:var(--me-ink); --cs:var(--me-soft);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#1D1815; --surface:#29221E; --surface-2:#332A25; --line:#40352E; --grid:#3A302A;
    --ink:#F4E9DE; --ink-2:#BBA899; --ink-3:#8A7A70;
    --btn:#F4E9DE; --btn-ink:#29221E;
    --me:#8DB6E8; --me-ink:#B5D1F3; --me-soft:#273444;
    --ta:#F2A0B7; --ta-ink:#F7BCCD; --ta-soft:#422B35;
    --down:#8FD1AE; --down-soft:#22382D; --up:#F2B48F; --up-soft:#44291D;
    --future:rgba(64,53,46,.45);
    --overlay:rgba(0,0,0,.55);
    --shadow:0 1px 2px rgba(0,0,0,.25),0 8px 24px -12px rgba(0,0,0,.6);
    --shadow-up:0 -10px 40px -16px rgba(0,0,0,.7);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#1D1815; --surface:#29221E; --surface-2:#332A25; --line:#40352E; --grid:#3A302A;
  --ink:#F4E9DE; --ink-2:#BBA899; --ink-3:#8A7A70;
  --btn:#F4E9DE; --btn-ink:#29221E;
  --me:#8DB6E8; --me-ink:#B5D1F3; --me-soft:#273444;
  --ta:#F2A0B7; --ta-ink:#F7BCCD; --ta-soft:#422B35;
  --down:#8FD1AE; --down-soft:#22382D; --up:#F2B48F; --up-soft:#44291D;
  --future:rgba(64,53,46,.45);
  --overlay:rgba(0,0,0,.55);
  --shadow:0 1px 2px rgba(0,0,0,.25),0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-up:0 -10px 40px -16px rgba(0,0,0,.7);
  color-scheme:dark;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{background:var(--bg);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:15px;line-height:1.55;padding-top:env(safe-area-inset-top, 0px);padding-bottom:env(safe-area-inset-bottom, 0px)}
body.who-ta{--c:var(--ta);--ci:var(--ta-ink);--cs:var(--ta-soft)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
input{font:inherit;color:inherit}
[hidden]{display:none!important}
:focus-visible{outline:2.5px solid var(--ci);outline-offset:2px;border-radius:10px}
.app{max-width:460px;margin:0 auto;padding-left:max(16px, env(safe-area-inset-left, 0px));padding-right:max(16px, env(safe-area-inset-right, 0px));padding-block:0 40px}
main{display:flex;flex-direction:column;gap:14px}

/* 顶栏 */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top, 0px);z-index:10;background:var(--bg)}
.top{position:sticky;top:env(safe-area-inset-top, 0px);z-index:5;background:var(--bg);display:flex;align-items:center;gap:10px;padding-block:12px 10px}
.brand{display:flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:21px;letter-spacing:.04em;margin-right:auto}
.brand svg{width:32px;height:32px}
.icon-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--surface);box-shadow:var(--shadow);color:var(--ink-2)}
.i{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
body:not(.authed) .authed-only{display:none}

/* 我 / Ta */
.who{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;border-radius:999px;background:var(--surface-2)}
.who button{display:flex;align-items:center;justify-content:center;gap:8px;height:42px;border-radius:999px;font-weight:800;color:var(--ink-2);transition:background .2s,color .2s,box-shadow .2s;min-width:0}
.who button span.nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.who button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.av{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:900;flex:none}
.av-me{background:var(--me-soft);color:var(--me-ink)}
.av-ta{background:var(--ta-soft);color:var(--ta-ink)}

/* 卡片 */
.card{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:18px}
.eyebrow{margin:0;font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.04em}
h1,h2{margin:0;font-family:var(--font-display);font-weight:400;text-wrap:balance}
h1{font-size:25px;line-height:1.3}
h2{font-size:19px}
.muted{color:var(--ink-2);font-size:13.5px}

/* 今天 */
.today{display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden}
.today::after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;background:var(--cs);right:-60px;top:-70px;z-index:0}
.today>*{position:relative;z-index:1}
.scale{display:flex;align-items:center;gap:10px}
.step{width:46px;height:46px;border-radius:50%;background:var(--surface-2);display:grid;place-items:center;flex:none;font-size:22px;font-weight:800;color:var(--ink-2);touch-action:manipulation}
.step:active{transform:scale(.94)}
.readout{flex:1;min-width:0;display:flex;align-items:baseline;justify-content:center;gap:6px;height:72px;border-radius:20px;background:var(--surface-2);border:2px solid transparent;transition:border-color .15s}
.readout:focus-within{border-color:var(--c)}
.readout input{width:5ch;border:0;background:transparent;text-align:center;font-size:42px;font-weight:900;letter-spacing:-.01em;outline:none;font-variant-numeric:tabular-nums;padding:0;min-width:0}
.readout input::placeholder{color:var(--ink-3);font-weight:800}
.readout span{font-size:16px;font-weight:800;color:var(--ink-3)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:50px;padding:0 22px;border-radius:999px;font-weight:800;font-size:16px;white-space:nowrap;text-decoration:none}
.btn-primary{background:var(--btn);color:var(--btn-ink);box-shadow:var(--shadow)}
.btn-primary:active{transform:scale(.985)}
.btn-primary[disabled]{opacity:.6;cursor:progress;transform:none}
.btn-block{width:100%}
.btn-soft{background:var(--surface-2);color:var(--ink);height:40px;font-size:14px;padding:0 16px}
.btn-ghost{color:var(--ink-2);background:var(--surface)}
.btn-danger{color:var(--up)}
.hint{font-size:12.5px;color:var(--ink-3);text-align:center;margin:-2px 0 0}
.err{font-size:13px;font-weight:700;color:var(--up);text-align:center;margin:-4px 0 0}
.big{display:flex;align-items:baseline;gap:6px}
.big b{font-size:54px;line-height:1;font-weight:900;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.big span{font-size:18px;font-weight:800;color:var(--ink-3)}
.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:3px 12px;border-radius:999px;font-size:13.5px;font-weight:800;line-height:1.3}
.chip.down{background:var(--down-soft);color:var(--down)}
.chip.up{background:var(--up-soft);color:var(--up)}
.chip.flat{background:var(--surface-2);color:var(--ink-2)}
.link{color:var(--ink-2);font-weight:800;font-size:14px;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line)}

/* 图表 */
.chart-head{display:flex;align-items:center;gap:6px}
.chart-head h2{flex:1;text-align:center}
.nav{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);color:var(--ink-2)}
.nav[disabled]{opacity:.35;cursor:default}
.legend{display:flex;justify-content:center;gap:18px;margin:10px 0 2px;font-size:12.5px;color:var(--ink-2)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.k-dot{width:9px;height:9px;border-radius:50%;background:var(--c)}
.k-line{width:20px;height:3px;border-radius:2px;background:var(--ci)}
.plot{position:relative;margin:0 -6px;touch-action:pan-y;min-height:200px}
.plot svg{display:block;width:100%;overflow:visible}
.plot text{font-family:var(--font-body);font-size:11px;fill:var(--ink-3);font-variant-numeric:tabular-nums}
.plot .today-label{fill:var(--ink);font-weight:800}
.tip-pop{position:absolute;pointer-events:none;background:var(--ink);color:var(--bg);border-radius:12px;padding:7px 10px;font-size:12.5px;line-height:1.4;white-space:nowrap;transform:translate(-50%,calc(-100% - 12px));box-shadow:var(--shadow);opacity:0;transition:opacity .12s}
.tip-pop.show{opacity:1}
.tip-pop b{font-size:14px}
.empty-chart{display:grid;place-items:center;text-align:center;min-height:200px;color:var(--ink-2);font-size:14px;padding:20px}
.explain{margin:6px 2px 0;font-size:12.5px;color:var(--ink-3);text-align:center}

/* 数字 */
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stat{background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow);padding:14px 14px 12px;display:flex;flex-direction:column;gap:2px;min-width:0;text-align:left}
.stat .label{font-size:12.5px;font-weight:700;color:var(--ink-2)}
.stat .value{font-size:24px;font-weight:900;letter-spacing:-.01em;line-height:1.25;font-variant-numeric:tabular-nums}
.stat .value small{font-size:13px;font-weight:800;color:var(--ink-3);margin-left:3px}
.stat .sub{font-size:12px;color:var(--ink-3)}
.stat .tag{align-self:flex-start;margin-top:2px;font-size:11.5px;font-weight:800;padding:1px 8px;border-radius:999px;background:var(--surface-2);color:var(--ink-2)}

/* 早上提醒 */
.remind{display:flex;flex-direction:column;gap:10px}
.remind-top{display:flex;align-items:center;gap:12px}
.remind .ico{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--cs);color:var(--ci);flex:none}
.remind-top>div{flex:1;min-width:0}
.remind b{display:block;font-size:15px}
.remind-dev{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 12px;border-radius:14px;background:var(--surface-2);font-size:13px;color:var(--ink-2)}
.remind-dev span{flex:1 1 160px;min-width:0}
.remind-dev .btn{height:34px;font-size:13px;padding:0 14px;background:var(--surface)}
.switch{width:52px;height:32px;border-radius:999px;background:var(--line);position:relative;flex:none;transition:background .2s}
.switch::after{content:"";position:absolute;top:4px;left:4px;width:24px;height:24px;border-radius:50%;background:var(--surface);box-shadow:0 1px 3px rgba(0,0,0,.2);transition:transform .2s}
.switch[aria-checked="true"]{background:var(--down)}
.switch[aria-checked="true"]::after{transform:translateX(20px)}
.switch[disabled]{opacity:.6}

/* 提示条 */
.tip{display:flex;align-items:center;flex-wrap:wrap;gap:10px 12px;padding:14px 16px;border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow)}
.tip .ico{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--cs);color:var(--ci);flex:none}
.tip p{margin:0;flex:1 1 200px;min-width:0;font-size:14px;font-weight:700;line-height:1.5}
.tip-btns{display:flex;gap:6px;flex-wrap:wrap;margin-left:50px}
.tip .btn{height:36px;font-size:13.5px;padding:0 14px}

/* 记录列表 */
.list{display:flex;flex-direction:column;margin:8px -6px 0}
.rec{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:11px 8px;border-radius:14px;text-align:left;width:100%}
.rec+.rec{border-top:1px solid var(--grid)}
button.rec:active{background:var(--surface-2)}
.rec .d{font-weight:800;font-size:14px;min-width:4.6em}
.rec .d small{display:block;font-weight:600;font-size:12px;color:var(--ink-3)}
.rec .w{font-weight:900;font-size:17px;font-variant-numeric:tabular-nums}
.rec .w small{font-weight:700;font-size:12px;color:var(--ink-3);margin-left:2px}
.list-btns{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:8px}

/* 底部弹出 */
.sheet-root{position:fixed;inset:0;z-index:20;display:flex;align-items:flex-end;justify-content:center}
.backdrop{position:absolute;inset:0;background:var(--overlay);animation:fade .2s}
.sheet{position:relative;width:100%;max-width:460px;max-height:calc(100% - 24px - env(safe-area-inset-top, 0px));overflow-y:auto;overscroll-behavior:contain;background:var(--bg);border-radius:28px 28px 0 0;box-shadow:var(--shadow-up);padding:10px max(18px, env(safe-area-inset-left, 0px)) calc(22px + env(safe-area-inset-bottom, 0px)) max(18px, env(safe-area-inset-right, 0px));display:flex;flex-direction:column;gap:14px;animation:up .25s cubic-bezier(.2,.8,.2,1)}
.grab{width:42px;height:5px;border-radius:3px;background:var(--line);align-self:center;flex:none}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:800;font-size:14px}
.input{height:48px;border-radius:14px;border:2px solid transparent;background:var(--surface);padding:0 14px;font-size:16px;outline:none;width:100%}
.input:focus{border-color:var(--c)}
.sheet-foot{display:flex;gap:10px;flex-wrap:wrap}
.sheet-foot .btn{flex:1}
.set-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:12px 14px;border-radius:16px;background:var(--surface)}
.set-row>div{flex:1 1 180px;min-width:0}
.set-row b{display:block;font-size:14.5px}
.set-row span{font-size:13px;color:var(--ink-2)}
.set-row .btn{height:36px;font-size:13.5px;padding:0 14px}
.set-btns{display:flex;gap:6px;flex-wrap:wrap}
.set-btns .btn:not(.btn-primary):not(.btn-ghost){background:var(--surface-2)}
@keyframes up{from{transform:translateY(40px);opacity:.4}to{transform:none;opacity:1}}
@keyframes fade{from{opacity:0}}

/* 登录 */
.login{min-height:calc(100vh - 120px);display:grid;place-items:center}
.login-card{width:100%;background:var(--surface);border-radius:28px;box-shadow:var(--shadow);padding:28px 22px 24px;display:flex;flex-direction:column;gap:14px}
.login-card h1{text-align:center}
.login-card p.muted{text-align:center;margin:-8px 0 4px}
.login-card .input{background:var(--surface-2)}

.boot{display:flex;align-items:center;justify-content:center;gap:10px;min-height:60vh;color:var(--ink-2);font-weight:700}
.boot-dot{width:10px;height:10px;border-radius:50%;background:var(--c);animation:pulse 1s ease-in-out infinite}
@keyframes pulse{50%{opacity:.3}}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom, 0px));transform:translate(-50%,20px);background:var(--ink);color:var(--bg);padding:11px 18px;border-radius:999px;font-weight:800;font-size:14px;opacity:0;transition:opacity .2s,transform .2s;z-index:30;pointer-events:none;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}
.net{position:fixed;left:50%;top:calc(64px + env(safe-area-inset-top, 0px));transform:translateX(-50%);background:var(--up-soft);color:var(--up);padding:8px 14px;border-radius:999px;font-size:13px;font-weight:800;z-index:6;white-space:nowrap}
.foot-note{font-size:12px;color:var(--ink-3);text-align:center;margin:4px 0 0}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}