/* =========================================================
   电子挤牙膏 · 复古胶片风格
   暖色 / 颗粒噪点 / 柔和暗角 / 复古排版
   ========================================================= */

:root{
  --c-primary:#35ac71;
  --c-accent:#4ea8bc;
  --c-cta:#d02f49;
  --c-bg:#f8fbfa;
  --c-card:#ffffff;
  --c-text:#1b2c24;
  --c-text2:#5c7a6b;
  --c-border:#dbe6e0;
  --r:8px;
  --serif:'Noto Serif SC','Songti SC','STSong',Georgia,'Times New Roman',serif;
  --sans:system-ui,-apple-system,'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{overscroll-behavior:none}
body{
  font-family:var(--sans);
  background:var(--c-bg);
  color:var(--c-text);
  max-width:640px;
  margin:0 auto;
  padding:0 14px calc(92px + env(safe-area-inset-bottom));
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  position:relative;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.serif{font-family:var(--serif)}

/* ---------- 胶片暗角 + 颗粒 ---------- */
.vig{
  position:fixed;inset:0;z-index:58;pointer-events:none;
  background:
    radial-gradient(125% 92% at 50% 40%, transparent 52%, rgba(27,44,36,.20) 100%),
    linear-gradient(160deg, rgba(255,247,228,.32), rgba(255,247,228,0) 44%);
}
.grain{
  position:fixed;inset:0;z-index:64;pointer-events:none;opacity:.08;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grainShift .9s steps(2) infinite;
}
@keyframes grainShift{
  0%{transform:translate(0,0)}
  50%{transform:translate(-2.5%,2%)}
  100%{transform:translate(2%,-1.5%)}
}
/* 相纸外框 */
body::before{
  content:"";position:fixed;inset:7px;z-index:66;pointer-events:none;
  border:1px solid rgba(27,44,36,.14);border-radius:12px;
}
body::after{
  content:"";position:fixed;inset:10px;z-index:66;pointer-events:none;
  border:1px solid rgba(255,255,255,.5);border-radius:10px;
}

/* ---------- 片头 ---------- */
.masthead{
  position:relative;padding:16px 4px 12px;
  border-bottom:1px dashed var(--c-border);
  margin-bottom:14px;
}
.sprocket{
  height:12px;display:flex;justify-content:space-between;gap:2px;margin-bottom:12px;opacity:.85;
}
.sprocket i{flex:1;height:7px;border-radius:50%;background:var(--c-primary);opacity:.4}
.masthead-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.stamp{
  font-size:10px;letter-spacing:.2em;color:var(--c-cta);text-transform:uppercase;
  border:1px dashed var(--c-cta);border-radius:var(--r);padding:3px 8px;
  transform:rotate(-2deg);background:rgba(208,47,73,.05);
}
.datestamp{
  font-size:11px;letter-spacing:.14em;color:var(--c-text2);
  font-variant-numeric:tabular-nums;
}
.logo{
  font-family:var(--serif);font-weight:900;font-size:34px;letter-spacing:.06em;
  color:var(--c-text);line-height:1.15;text-shadow:1px 1px 0 rgba(255,255,255,.8);
}
.sub{
  margin-top:6px;font-size:10px;letter-spacing:.18em;color:var(--c-text2);
  text-transform:uppercase;
}

/* ---------- 通用卡片 / 相纸框 ---------- */
.card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r);
  padding:14px;
  position:relative;
  box-shadow:0 1px 0 rgba(27,44,36,.04), 0 12px 26px -16px rgba(27,44,36,.22);
}
.card::before{
  content:"";position:absolute;inset:5px;border:1px solid rgba(27,44,36,.08);border-radius:4px;pointer-events:none;
}
.card-head{
  display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;
}
.card-head h2{font-size:18px;font-weight:700;letter-spacing:.04em}
.btn-ghost{
  font-size:12px;color:var(--c-text2);border:1px solid var(--c-border);
  border-radius:var(--r);padding:5px 10px;transition:all .18s ease;background:var(--c-bg);
}
.btn-ghost:hover{color:var(--c-cta);border-color:var(--c-cta)}
.btn-ghost:active{transform:scale(.96)}

/* ---------- 画布区 ---------- */
.canvas-wrap{
  position:relative;border:1px solid var(--c-border);border-radius:var(--r);
  overflow:hidden;background:#f1f7f2;
  box-shadow:inset 0 2px 6px rgba(27,44,36,.06);
}
canvas{display:block;width:100%;height:auto;touch-action:none;user-select:none;-webkit-user-select:none}
.hint{
  position:absolute;left:50%;bottom:10px;transform:translateX(-50%);
  font-size:11px;letter-spacing:.08em;color:var(--c-text2);
  background:rgba(255,255,255,.82);border:1px solid var(--c-border);
  padding:4px 10px;border-radius:20px;white-space:nowrap;
  backdrop-filter:blur(3px);transition:opacity .3s ease;
  pointer-events:none;
}
.hint.dim{opacity:.25}

.rec-dot{
  position:absolute;top:10px;left:12px;width:9px;height:9px;border-radius:50%;
  background:var(--c-cta);box-shadow:0 0 0 3px rgba(208,47,73,.18);
  animation:blink 1.4s ease-in-out infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}
.roll-counter{
  position:absolute;top:8px;right:12px;font-size:9px;letter-spacing:.2em;color:var(--c-text2);
}

/* ---------- 得分印章 ---------- */
.score-stamp{
  position:absolute;top:16px;right:16px;transform:rotate(-8deg);
  background:rgba(255,255,255,.92);border:2px dashed var(--c-cta);border-radius:var(--r);
  padding:8px 12px;text-align:center;color:var(--c-cta);
  box-shadow:0 4px 12px rgba(208,47,73,.16);
  opacity:0;pointer-events:none;transition:opacity .3s ease;
  mix-blend-mode:multiply;
}
.score-stamp.show{opacity:1;animation:stampPop .45s cubic-bezier(.2,1.6,.4,1) both}
@keyframes stampPop{
  0%{transform:rotate(-8deg) scale(1.9);opacity:0}
  60%{transform:rotate(-8deg) scale(.94);opacity:1}
  100%{transform:rotate(-8deg) scale(1)}
}
.ss-tick{display:block;font-size:14px;line-height:1}
.ss-num{display:block;font-family:var(--serif);font-weight:900;font-size:30px;line-height:1.1}
.ss-label{display:block;font-size:13px;letter-spacing:.2em;margin-top:2px}
.ss-shape{display:block;font-size:10px;letter-spacing:.1em;border-top:1px dashed rgba(208,47,73,.4);margin-top:4px;padding-top:3px}

/* ---------- 元信息行 ---------- */
.meta-row{display:flex;justify-content:space-between;align-items:center;margin-top:12px;gap:8px}
.star-badge{
  font-size:13px;color:#9a7b16;background:#fff7d9;border:1px solid #f0e3ae;
  border-radius:20px;padding:4px 12px;font-variant-numeric:tabular-nums;
}
.today-badge{font-size:12px;color:var(--c-text2)}
.today-badge b{color:var(--c-cta);font-weight:600}

/* ---------- 页面切换 ---------- */
.page{display:none;animation:fadeUp .38s ease both}
.page.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.page-title{
  font-size:22px;font-weight:700;letter-spacing:.05em;margin:6px 0 14px;
  position:relative;display:inline-block;
}
.page-title::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:3px;
  background:repeating-linear-gradient(90deg,var(--c-primary) 0 10px,transparent 10px 16px);
}

/* ---------- 挑战页 ---------- */
.hero-card{
  position:relative;overflow:hidden;background:var(--c-card);
  border:1px solid var(--c-border);border-radius:var(--r);
  padding:18px 16px;margin-bottom:14px;
  box-shadow:0 12px 26px -16px rgba(27,44,36,.22);
}
.hero-card::before{
  content:"";position:absolute;inset:5px;border:1px dashed var(--c-border);border-radius:4px;pointer-events:none;
}
.hero-tag{
  position:absolute;top:14px;right:14px;font-size:9px;letter-spacing:.22em;color:var(--c-cta);
  border:1px solid var(--c-cta);border-radius:3px;padding:2px 7px;transform:rotate(3deg);
  background:rgba(208,47,73,.05);
}
.hero-date{font-size:11px;letter-spacing:.16em;color:var(--c-text2);text-transform:uppercase}
.hero-title{font-size:19px;font-weight:700;margin:6px 0 6px}
.hero-desc{font-size:13px;color:var(--c-text2);line-height:1.7;max-width:34em}
.hero-reward{margin:12px 0 14px;font-size:13px;color:var(--c-text)}
.stars{color:#c9a227;letter-spacing:2px;font-size:13px}
.btn-primary{
  display:inline-block;font-size:14px;font-weight:600;color:#fff;
  background:var(--c-cta);border-radius:var(--r);padding:11px 22px;
  box-shadow:0 6px 14px -6px rgba(208,47,73,.55);
  transition:transform .16s ease, box-shadow .16s ease;
  letter-spacing:.05em;
}
.btn-primary:hover{box-shadow:0 8px 18px -6px rgba(208,47,73,.6)}
.btn-primary:active{transform:scale(.96)}

.ch-list{display:flex;flex-direction:column;gap:10px}
.ch-card{
  position:relative;display:flex;align-items:center;gap:12px;
  background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r);
  padding:13px 14px;overflow:hidden;
  box-shadow:0 6px 16px -12px rgba(27,44,36,.18);
}
.ch-card.today{border-color:var(--c-primary);box-shadow:0 0 0 1px var(--c-primary)}
.ch-num{
  font-family:var(--serif);font-weight:900;font-size:22px;color:var(--c-border);
  line-height:1;min-width:34px;
}
.ch-card.done .ch-num{color:var(--c-primary)}
.ch-body{flex:1;min-width:0}
.ch-title{font-size:15px;font-weight:600;display:flex;align-items:center;gap:6px}
.tag-today{
  font-size:10px;color:#fff;background:var(--c-primary);border-radius:3px;padding:1px 6px;letter-spacing:.08em;
}
.ch-desc{font-size:12px;color:var(--c-text2);margin-top:3px;line-height:1.6}
.ch-side{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex-shrink:0}
.ch-state{font-size:12px}
.ch-state .done-txt{color:var(--c-primary);font-weight:600}
.btn-go{
  font-size:12px;color:var(--c-accent);border:1px solid var(--c-accent);
  border-radius:var(--r);padding:5px 11px;transition:all .16s ease;background:#fff;
}
.btn-go:hover{background:var(--c-accent);color:#fff}
.btn-go:active{transform:scale(.95)}
.done-stamp{
  position:absolute;right:-10px;bottom:-14px;font-family:var(--serif);font-weight:900;font-size:52px;
  color:rgba(53,172,113,.14);transform:rotate(-18deg);pointer-events:none;letter-spacing:0;
}

/* ---------- 图鉴页 ---------- */
.progress-line{
  display:flex;align-items:center;gap:10px;margin:4px 0 16px;
  font-size:12px;color:var(--c-text2);
}
.progress-track{flex:1;height:8px;background:var(--c-border);border-radius:10px;overflow:hidden}
.progress-fill{
  height:100%;width:0%;border-radius:10px;
  background:repeating-linear-gradient(90deg,var(--c-primary) 0 12px,#2d9461 12px 24px);
  transition:width .5s ease;
}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.shape-card{
  position:relative;background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r);
  padding:10px 6px 8px;text-align:center;
  box-shadow:0 6px 16px -12px rgba(27,44,36,.18);
  transition:transform .18s ease;
}
.shape-card:hover{transform:translateY(-3px)}
.shape-card.locked .shape-svg{filter:grayscale(1);opacity:.28}
.shape-card.locked{background:repeating-linear-gradient(45deg,#fff, #fff 6px, #f6f9f6 6px, #f6f9f6 12px)}
.shape-svg svg{width:100%;height:auto;display:block}
.shape-name{font-size:12px;margin-top:6px;color:var(--c-text);letter-spacing:.04em}
.shape-lock{position:absolute;top:6px;right:8px;font-size:11px;color:var(--c-text2)}
.shape-best{
  position:absolute;top:4px;left:6px;font-size:10px;color:var(--c-cta);
  border:1px dashed var(--c-cta);border-radius:3px;padding:1px 4px;transform:rotate(-4deg);
}

/* ---------- 底部导航 ---------- */
.tabbar{
  position:fixed;left:50%;transform:translateX(-50%);bottom:0;z-index:50;
  width:100%;max-width:640px;
  display:flex;background:rgba(255,255,255,.94);
  border-top:1px solid var(--c-border);
  backdrop-filter:blur(8px);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -8px 20px -14px rgba(27,44,36,.2);
}
.tabbar::before{
  content:"";position:absolute;left:0;right:0;top:-7px;height:7px;
  background:repeating-linear-gradient(90deg,transparent 0 8px,var(--c-border) 8px 9px,transparent 9px 20px);
  opacity:.6;
}
.tab{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:10px 0 8px;color:var(--c-text2);position:relative;
  transition:color .2s ease;
}
.tab-ic{line-height:1;transition:transform .2s ease}
.tab-txt{font-size:11px;letter-spacing:.1em}
.tab.active{color:var(--c-cta)}
.tab.active .tab-ic{transform:translateY(-2px)}
.tab.active::after{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--c-cta);
}

/* ---------- 提示气泡 ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(86px + env(safe-area-inset-bottom));z-index:80;
  transform:translate(-50%,14px);background:rgba(27,44,36,.92);color:#fff;
  font-size:13px;padding:10px 18px;border-radius:var(--r);letter-spacing:.04em;
  opacity:0;transition:all .28s ease;pointer-events:none;max-width:82vw;text-align:center;
  box-shadow:0 10px 22px -10px rgba(27,44,36,.5);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 响应式 ---------- */
@media (min-width:560px){
  body{padding-top:16px}
  .logo{font-size:40px}
}
@media (max-width:360px){
  .gallery{grid-template-columns:repeat(2,1fr)}
  .logo{font-size:29px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}