/*
 * 言习 · Quiet Studio / V1.1
 * 墨白、石墨、少量朱橙。优先给训练题面和录音让出视觉空间。
 * 仅覆盖视觉，不改数据、出题、录音与解析逻辑。
 */
:root {
  color-scheme: light;
  --bg: #f8f8f6;
  --paper: #ffffff;
  --ink: #242622;
  --dark: #1e211f;
  --muted: #757972;
  --line: #e7e9e4;
  --line2: #f0f1ee;
  --main: #d95f43;
  --main-light: #fff2ed;
  --teal: #d95f43;
  --teal-light: #fff2ed;
  --warn: #ad713c;
  --red: #bc424e;
  --radius: 15px;
  --sh: 0 1px 2px rgba(27,30,26,.025);
  background:var(--bg);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}
body{background:var(--bg);color:var(--ink)}
button, input, textarea, select {transition:background-color .15s ease,border-color .15s ease,color .15s ease,box-shadow .15s ease}
button:focus-visible,a:focus-visible{outline:3px solid rgba(217,95,67,.24);outline-offset:2px}
input:focus,select:focus,textarea:focus{border-color:#d7826b!important;box-shadow:0 0 0 3px rgba(217,95,67,.09)}

/* Desktop navigation — quiet and legible */
.sidebar{width:224px;flex-basis:224px;background:#fff;border-color:var(--line);padding:27px 14px 22px}
.brand{gap:11px;padding:3px 10px 32px}
.brand-mark{height:39px;width:39px;border-radius:12px;background:var(--dark);color:#fff;font-size:23px;font-weight:700}
.brand-mark:after{background:#ee7454;width:6px;height:6px;right:7px;top:6px;box-shadow:0 0 0 2px var(--dark)}
.brand strong{font-size:18px;font-weight:730;letter-spacing:.6px;color:#232621}
.brand span{font-size:10px;letter-spacing:.5px;color:#979a93;font-weight:550}
.nav-caption{color:#a3a79f;font-size:10px;font-weight:650;letter-spacing:1.2px;padding:22px 13px 9px}
.nav-btn{height:45px;padding:0 13px;gap:11px;color:#6e736d;border-radius:10px;font-weight:570}
.nav-btn:hover{background:#f7f7f4;color:#242722}
.nav-btn.active{background:#f6f1ed;color:#b84b33;font-weight:690}
.nav-btn.active .icon{color:#d35f42}
.local-pill{color:#9b9d96;padding:14px 13px;font-size:11px}
.online-dot{background:#7aa98d}

/* Header and page rhythm */
.main-frame{background:var(--bg)}
.topbar{height:66px;background:rgba(255,255,255,.88);border-color:var(--line);padding:0 37px;backdrop-filter:blur(16px)}
.top-path{color:#777a73;font-size:12px;font-weight:560}
.date-chip{color:#a0a29c;font-size:12px}
.icon-btn{background:#fff;border-color:#e8eae5;color:#666c66;border-radius:10px}
.icon-btn:hover{color:#1d201c;background:#f6f6f3;border-color:#d8dad4}
.view{padding:34px 38px 90px;max-width:1410px}
.page-heading{margin-bottom:24px}
.eyebrow{font-size:10px;letter-spacing:1.0px;color:#ac6a56;font-weight:700;text-transform:none}
.page-heading h1{color:#20231f;font-size:29px;font-weight:740;letter-spacing:-.7px;margin:7px 0 7px}
.page-heading p{color:#858980;font-size:13px;line-height:1.85}
.help,.micro{color:#898d85}
.muted,.hint{color:#797d76}
.panel-title{color:#92958e;font-weight:700;letter-spacing:.5px}

/* Buttons: charcoal primary, terracotta for active practice */
.btn{border:1px solid #e2e4dd;background:#fff;color:#454a43;border-radius:10px;font-weight:630;box-shadow:none}
.btn:hover{background:#fafaf8;border-color:#c7cbc2}
.btn.primary{background:#222522;border-color:#222522;color:#fff}
.btn.primary:hover{background:#373b36;border-color:#373b36}
.btn.teal{background:#d95f43;border-color:#d95f43;color:#fff}
.btn.teal:hover{background:#c95237;border-color:#c95237}
.btn.ghost:hover{background:#f1f2ee}
.btn.danger{color:#b3484a;border-color:#f0dad8}
.btn.big{border-radius:11px;min-height:50px;padding:12px 23px;font-size:14px}
.btn.sm{border-radius:8px}
.chip{color:#696e65;border-color:#e4e6df;background:#fff;border-radius:8px}
.chip:hover{border-color:#c5c9c0}
.chip.active{background:#fff4ee;border-color:#e4ae9e;color:#af533c}
.select,input[type='text'],input[type='number'],input[type='password'],textarea{border:1px solid #e2e5de;border-radius:10px;color:var(--ink)}
.field label,.field-label{color:#575c55;font-weight:620}

/* Cards and tags: less ornamental, more typographic */
.card{box-shadow:var(--sh);border:1px solid var(--line);border-radius:15px}
.card-pad{padding:25px}
.section-head h2{color:#272a25;font-weight:690;font-size:16px}
.tag{background:#f3f4f0;color:#686e66;font-weight:590;border-radius:7px}
.tag.blue{background:#efefe9;color:#555b50}
.tag.teal{background:#fff0e8;color:#be5c40}
.tag.orange{background:#fcf2e7;color:#9d6b39}
.tag.red{background:#fff0f0;color:#b3484a}

/* Home focus: no corporate gradients, no decorative circles, no sales banner */
.hero{background:#fff;border:1px solid #e7e9e4;box-shadow:var(--sh);color:var(--ink);border-radius:17px;padding:32px 35px;min-height:220px}
.hero:before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:#e86b4e}
.hero:after{display:none!important;content:none}
.hero-inner{max-width:590px}
.hero-eyebrow{color:#cf6c52;font-size:11px;letter-spacing:.8px;font-weight:680}
.hero h2{color:#222521;font-size:31px;letter-spacing:-.9px;font-weight:740;margin:11px 0 12px}
.hero p{color:#777b73;font-size:13px;line-height:1.85;margin-bottom:24px}
.hero .btn{background:#222522;color:#fff;border-color:#222522;font-size:14px;font-weight:650}
.hero .btn:hover{background:#3a3e39;border-color:#3a3e39}
.hero-number{border-left:1px solid #ebede8;padding-left:25px;min-width:144px;color:#292b27}
.hero-number b{font-size:40px;font-weight:670;letter-spacing:-1.5px}
.hero-number span{color:#888b83;line-height:1.65;font-size:11px}
.home-stats{gap:13px;margin:14px 0 30px}
.small-stat{background:#fff;border-color:#e7e9e4;border-radius:13px;padding:19px 21px}
.small-stat .val{font-size:26px;letter-spacing:-.5px;color:#242723;margin-top:11px}
.small-stat .lbl{font-size:11px;color:#94988e}
.track-card{padding:24px}
.track-card:hover{border-color:#d5d8d1;transform:translateY(-1px);box-shadow:0 5px 16px rgba(26,26,22,.035)}
.track-icon{height:44px;width:44px;background:#f1f2ed;color:#565d50;border-radius:12px}
.track-icon.green{background:#fcefe9;color:#ce6548}
.track-card h3{color:#252924;font-weight:710}
.track-card p{color:#777d74}

/* Question library and writing studio */
.empty-state{background:#fff;border:1px dashed #dedfd9;color:#868b81}
.empty-state h3{color:#3a3e37}
.empty-icon{background:#f3f4ef;color:#787f72}
.q-item{border-color:#e7e9e4;border-radius:12px}
.q-title{color:#262923}
.q-sub,.q-desc{color:#8c9087}
.batch-item{color:#737970;border-radius:9px}
.batch-item.active{background:#fff1ea;color:#b5533c}

/* The training card is the actual product */
.train-layout{max-width:900px}
.progress{height:4px;background:#edeee8}
.progress-inner{background:#dd765b}
.train-sheet{padding:40px 44px 33px;min-height:450px}
.train-sheet h1{font-size:27px;font-weight:730;color:#252824;letter-spacing:-.6px}
.train-prompt{color:#30352d;line-height:1.94}
.train-reading{color:#2c302a;line-height:2.2}
.info-box{background:#f9faf7;border:1px solid #eceee8;border-radius:11px}
.info-box-label{color:#888e83;font-size:11px;font-weight:650;letter-spacing:.1px}
.info-box p{color:#333831}
/* old template has inline turquoise for B's known facts; override it intentionally */
.train-sheet > .info-box[style]{background:#fffaf6!important;border-color:#f0e2d9!important}
.train-sheet > .info-box[style] .info-box-label{color:#aa755f!important}
.speak-panel{background:#fafaf8;border:1px solid #eef0e9;border-radius:14px}
.speak-circle{background:#fff0e9;color:#cd5e44;box-shadow:inset 0 0 0 1px #fae3d9}
.speak-circle.recording{background:#ffe4e3;color:#b84245;box-shadow:inset 0 0 0 1px #f2c8c9}
.speak-clock{color:#292d27;font-weight:720}
.speak-muted{color:#959b90}
.audio-attempt{border-color:#e6e8e2;background:#fff}
.audio-meta{color:#95988f}
.transcript-box{background:#fafaf8;border-color:#e8ebe5;color:#4b5247}
.outline-list li:before{background:#d9755a}
.study-tabs{background:#f1f2ee;border-radius:10px}
.study-tabs button{color:#7b8176}
.study-tabs button.active{color:#30342e;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.studio-bp{border-color:#e6e8e2}
.studio-bp label{color:#858a80}
.prompt-preview{background:#fafaf8;border-color:#e9ebe5;color:#555c53}
.badge-warning{background:#fffbf6;border-color:#f0e5d7;color:#996b42}
.import-result{border-color:#e7e9e3}
.import-result input[type='checkbox']{accent-color:#d95f43}
.import-result .result-meta{color:#878d84}
.stat-large span{color:#868d84}
.switch{background:#e1e4dc}
.switch.on{background:#d95f43}
.dialog-overlay{background:rgba(20,23,19,.55)}
.dialog{box-shadow:0 23px 78px rgba(18,20,16,.14);border-radius:17px}
.toast{background:#262924}
.toast.error{background:#b6484b}

@media (max-width:1300px){
  .sidebar{width:206px;flex-basis:206px}
  .view{padding:28px 28px 90px}
  .topbar{padding:0 28px}
}
@media (max-width:1080px){
  .sidebar{width:190px;flex-basis:190px}
  .view{padding:26px 21px 90px}
}
@media (max-width:760px){
  .topbar{height:56px;padding:0 17px;background:rgba(255,255,255,.93)}
  .view{padding:22px 15px calc(100px + env(safe-area-inset-bottom))}
  .page-heading h1{font-size:25px}
  .page-heading p{font-size:12px}
  .eyebrow{font-size:10px}
  .hero{padding:29px 24px;min-height:0;border-radius:16px}
  .hero h2{font-size:26px;margin:9px 0 11px;line-height:1.3}
  .hero p{font-size:12.5px;line-height:1.82;max-width:340px}
  .hero .btn{min-height:47px}
  .home-stats{margin:12px 0 26px;gap:8px}
  .small-stat{padding:14px 10px;border-radius:11px}
  .small-stat .val{font-size:22px;margin-top:8px}
  .small-stat .lbl{font-size:10px}
  .card-pad{padding:19px}
  .train-sheet{padding:24px 19px;min-height:380px}
  .train-sheet h1{font-size:23px;line-height:1.38}
  .train-prompt{font-size:15px;line-height:1.86}
  .train-reading{font-size:16px;line-height:2.05}
  .speak-panel{margin:18px 0;padding:25px 13px}
  .mobile-nav{background:rgba(255,255,255,.97);border-color:#e7e9e4;box-shadow:0 -5px 20px rgba(38,41,34,.03)}
  .mobile-nav button{color:#969a92;font-size:10px;font-weight:630;border-radius:12px;min-width:56px}
  .mobile-nav button.active{color:#c9583e}
  .mobile-nav button.active:before{display:none}
  .mobile-nav button.active .icon{background:#fff0e9;border-radius:10px;box-sizing:content-box;padding:5px;margin:-5px 0}
  .studio-mobile-tabs{background:#f0f1ec}
  .studio-mobile-tabs button{color:#888c83}
  .studio-mobile-tabs button.active{color:#ad523d;box-shadow:none;background:#fff}
  .mobile-record-dock{background:rgba(255,255,255,.98);border-color:#e7e9e4;border-radius:15px;box-shadow:0 10px 34px rgba(28,30,25,.12);padding:10px 12px}
  .mobile-record-dock strong{color:#353931}
  .mobile-record-dock span{color:#92968e}
  .mobile-record-dock .btn{font-weight:670}
  .toast-stack{bottom:calc(77px + env(safe-area-inset-bottom))}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* 手机一级导航收敛为三项：训练 / 题库 / 记录。A/B 是训练的子入口；出题与导入从题库一键进入。 */
@media(max-width:760px){
  .mobile-nav{justify-content:space-around;gap:0;padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right))}
  .mobile-nav button{flex:1 1 0;max-width:180px;min-width:0;white-space:nowrap;letter-spacing:.1px;font-size:11px}
  .mobile-nav button .icon{width:22px;height:22px}
  .page-heading .heading-actions{display:flex;gap:8px;max-width:none;flex-wrap:wrap}
  .page-heading .heading-actions .btn{white-space:nowrap}
}
.section-tools{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.home-history-link{display:flex;justify-content:flex-end;margin:-2px 0 22px}
.home-history-link .btn{display:inline-flex;align-items:center;gap:6px;color:#666b65}
.home-history-link .btn:hover{color:#bf543d}
.home-history-link .icon{width:15px;height:15px}

/* 历史记录以回听内容为先，统计作为次级信息 */
.history-summary{margin-top:20px}
@media(max-width:760px){
  .history-summary .stat-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .history-summary .stat-large{padding:15px 16px;min-height:92px}
  .history-summary .stat-large strong{font-size:25px;margin:7px 0 0}
  .history-summary .stat-large span{font-size:11px}
  .history-item{align-items:flex-start}
  .history-item .btn{flex-shrink:0}
}

/* 云端单用户登录页：始终覆盖在应用最上层 */
#cloudLogin{position:fixed;inset:0;z-index:10000;background:#f8f8f6;display:flex;justify-content:center;align-items:center;padding:24px}
.cloud-login-box{width:min(100%,420px);padding:38px 32px;background:#fff;border:1px solid #e9e7e2;border-radius:18px;box-shadow:0 22px 80px #1a1a1a0a}
.cloud-login-box h1{font-size:27px;letter-spacing:-.8px;margin:16px 0 7px}.cloud-login-box p{font-size:13px;color:#787878;line-height:1.7}
.cloud-logo{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:#292c2b;color:white;font-size:23px;border-radius:14px}
.cloud-login-box form{margin-top:27px;display:grid;gap:10px}.cloud-login-box label{font-weight:600;font-size:13px}.cloud-login-box input{width:100%;border:1px solid #dedede;padding:14px 13px;border-radius:10px;outline:none}.cloud-login-box input:focus{border-color:#666}
.cloud-login-box .cloud-login-error{min-height:17px;margin:0;color:#b33}.cloud-login-box .cloud-login-foot{margin-top:20px;color:#aaa;text-align:center;font-size:11px}
@media(max-width:480px){.cloud-login-box{padding:28px 24px}}