:root{
  --bg:#eef2fb;
  --card:#ffffff;
  --primary:#4a7cff;
  --primary-dark:#355fd6;
  --accent:#ffb703;
  --good:#2ecc71;
  --bad:#e74c3c;
  --text:#1f2a44;
  --muted:#6b7a99;
  --rule-bg:#eaf1ff;
  --hint-bg:#fff7e0;
  --gold:#f5b301;
  --shadow:0 6px 20px rgba(31,42,68,.08);
  --radius:16px;
  --radius-sm:12px;
}

html.dark {
  --bg:#1a1d27;
  --card:#242836;
  --primary:#6b9aff;
  --primary-dark:#8bb0ff;
  --text:#e8ecf4;
  --muted:#9aa3b8;
  --rule-bg:#2a3044;
  --hint-bg:#3d3420;
  --shadow:0 6px 20px rgba(0,0,0,.3);
}

*{box-sizing:border-box;}
body{
  margin:0;
  font-family:'Segoe UI','Trebuchet MS',system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.55;padding:16px;
  transition: background .3s, color .3s;
}
#app{max-width:900px;margin:0 auto;}

/* Sticky header */
.sticky-header{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;gap:12px;
  background:var(--card);border-radius:var(--radius);
  padding:12px 18px;box-shadow:var(--shadow);margin-bottom:18px;
  flex-wrap:wrap;
}
header.top h1{font-size:1.15rem;margin:0;cursor:pointer;flex:0 0 auto;}
header.top h1:hover{color:var(--primary);}
.stats{display:flex;gap:10px;font-weight:600;flex-wrap:wrap;align-items:center;}
.stats .pill{
  background:var(--rule-bg);color:var(--primary-dark);
  padding:6px 12px;border-radius:999px;font-size:.9rem;
  display:inline-flex;align-items:center;gap:6px;
}
.stats .pill.gold{background:#fff3d6;color:#a86b00;}
html.dark .stats .pill.gold{background:#3d3420;color:#ffd15a;}

.coin-svg{width:1.3em;height:1.3em;vertical-align:middle;display:inline-block;}
.coin-pill .coin-svg{width:1.4em;height:1.4em;}
.coin-pulse{animation:coinPulse .5s ease;}
@keyframes coinPulse{
  0%{transform:scale(1)} 50%{transform:scale(1.15)} 100%{transform:scale(1)}
}

.menu-toggle{
  display:none;
  background:var(--rule-bg);color:var(--primary-dark);
  border:none;border-radius:10px;
  font-size:1.3rem;font-weight:700;
  width:44px;height:44px;cursor:pointer;
  line-height:1;padding:0;
}

.desktop-nav{
  display:flex;gap:8px;align-items:center;margin-left:auto;flex-wrap:wrap;
}
.nav-btn{
  background:var(--rule-bg);color:var(--primary-dark);
  border:none;border-radius:10px;
  padding:10px 14px;font-size:.85rem;font-weight:600;
  cursor:pointer;transition:background .2s,transform .15s;
  position:relative;
  display:inline-flex;align-items:center;gap:6px;
  min-height:44px;
}
.nav-btn:hover{background:#dfe7fa;transform:translateY(-1px);}
html.dark .nav-btn:hover{background:#353b50;}
.nav-btn.active{background:var(--primary);color:#fff;}
.nav-btn .nav-label{white-space:nowrap;}
.badge{
  position:absolute;top:-4px;right:-4px;
  background:var(--bad);color:#fff;font-size:.65rem;
  min-width:18px;height:18px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;padding:0 4px;
}

.link{background:none;border:none;color:var(--muted);cursor:pointer;font-size:.9rem;padding:8px;}
.link:hover{color:var(--bad);}

/* Offcanvas */
.offcanvas-backdrop{
  display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:200;
}
.offcanvas-backdrop.open{display:block;}
.offcanvas{
  position:fixed;top:0;left:0;bottom:0;width:280px;max-width:85vw;
  background:var(--card);z-index:210;transform:translateX(-100%);
  transition:transform .25s ease;box-shadow:4px 0 24px rgba(0,0,0,.15);
  display:flex;flex-direction:column;
}
.offcanvas.open{transform:translateX(0);}
.offcanvas-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px;border-bottom:1px solid var(--rule-bg);
}
.offcanvas-user{display:flex;align-items:center;gap:10px;}
.offcanvas-user img{width:44px;height:44px;border-radius:50%;object-fit:cover;}
.offcanvas-name{font-weight:700;}
.offcanvas-coins{font-size:.85rem;color:var(--muted);display:flex;align-items:center;gap:4px;}
.offcanvas-close{background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--muted);width:44px;height:44px;}
.offcanvas-nav{display:flex;flex-direction:column;padding:8px;}
.offcanvas-item{
  display:flex;align-items:center;gap:12px;
  background:none;border:none;padding:14px 16px;font-size:1rem;
  color:var(--text);cursor:pointer;border-radius:10px;text-align:left;
  min-height:48px;
}
.offcanvas-item:hover,.offcanvas-item.active{background:var(--rule-bg);}
.offcanvas-item.active{color:var(--primary);font-weight:600;}

/* Cards */
.card{
  background:var(--card);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow);margin-bottom:18px;
  transition: box-shadow .2s;
}
.card:hover{box-shadow:0 8px 28px rgba(31,42,68,.12);}
html.dark .card:hover{box-shadow:0 8px 28px rgba(0,0,0,.4);}
.card h2{margin-top:0;font-size:1.25rem;}

/* Profile */
.profile-card{overflow:hidden;}
.level-bg-blue{background:linear-gradient(135deg,#e8f0ff 0%,#ffffff 60%);}
.level-bg-green{background:linear-gradient(135deg,#e6f9ef 0%,#ffffff 60%);}
.level-bg-gold{background:linear-gradient(135deg,#fff6e0 0%,#ffffff 60%);}
html.dark .level-bg-blue{background:linear-gradient(135deg,#1e2a44 0%,#242836 60%);}
html.dark .level-bg-green{background:linear-gradient(135deg,#1a3328 0%,#242836 60%);}
html.dark .level-bg-gold{background:linear-gradient(135deg,#3a3020 0%,#242836 60%);}

.character-panel{display:flex;gap:20px;align-items:flex-start;flex-wrap:wrap;}
.avatar-wrap{
  position:relative;width:110px;height:110px;flex-shrink:0;
}
.xp-ring{position:absolute;inset:0;width:100%;height:100%;transform:rotate(-90deg);}
.xp-ring-bg{fill:none;stroke:var(--rule-bg);stroke-width:6;}
.xp-ring-fg{fill:none;stroke:var(--primary);stroke-width:6;stroke-linecap:round;transition:stroke-dashoffset .6s ease;}
.character-avatar{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:80px;height:80px;border-radius:50%;object-fit:cover;
  border:3px solid var(--card);box-shadow:0 2px 8px rgba(0,0,0,.1);
}
.level-badge{
  position:absolute;bottom:-4px;left:50%;transform:translateX(-50%);
  background:var(--primary);color:#fff;font-size:.7rem;font-weight:700;
  padding:2px 10px;border-radius:999px;white-space:nowrap;
}
.character-info{flex:1;min-width:180px;}
.character-info h2{margin:0 0 6px;}
.streak-line{font-size:.95rem;margin-bottom:4px;}
.xp-text{font-size:.85rem;color:var(--muted);margin-bottom:8px;}

.equipped-shelf{
  display:flex;flex-wrap:wrap;gap:6px;margin:8px 0;
}
.eq-item{
  background:var(--rule-bg);padding:4px 10px;border-radius:999px;
  font-size:.8rem;white-space:nowrap;
}
.eq-empty{font-size:.8rem;color:var(--muted);font-style:italic;}

.goal-block{margin-top:10px;}
.goal-title{font-weight:600;font-size:.9rem;margin-bottom:4px;}
.goal-bar-wrap{
  height:10px;background:var(--rule-bg);border-radius:5px;overflow:hidden;
}
.goal-bar{
  height:100%;background:linear-gradient(90deg,var(--accent),#ff9500);
  border-radius:5px;transition:width .4s ease;
}
.goal-meta{font-size:.8rem;color:var(--muted);margin-top:4px;display:flex;align-items:center;gap:8px;}

.recent-ach{margin-top:8px;display:flex;align-items:center;gap:4px;flex-wrap:wrap;}
.mini-ach{font-size:1.2rem;}

.btn-tiny{
  background:var(--rule-bg);border:none;border-radius:6px;
  padding:2px 8px;font-size:.75rem;cursor:pointer;color:var(--primary-dark);
  min-height:28px;
}
.btn-tiny:hover{background:var(--primary);color:#fff;}

/* Today */
.today-grid{display:flex;gap:16px;margin-bottom:12px;}
.today-item{text-align:center;flex:1;background:var(--rule-bg);border-radius:var(--radius-sm);padding:12px 8px;}
.today-num{font-size:1.6rem;font-weight:700;color:var(--primary);}
.today-label{font-size:.8rem;color:var(--muted);}
.daily-goal{margin-top:4px;}
.daily-goal-label{font-size:.85rem;margin-bottom:4px;}

/* Events */
.event-row{
  display:flex;justify-content:space-between;align-items:center;
  padding:8px 0;border-bottom:1px solid var(--rule-bg);font-size:.9rem;
}
.event-row:last-child{border-bottom:none;}
.event-time{color:var(--muted);font-size:.8rem;white-space:nowrap;margin-left:12px;}

/* Topics */
.topic-section{margin-bottom:20px;}
.section-title{
  font-size:1rem;color:var(--muted);margin:0 0 10px;
  padding-bottom:6px;border-bottom:2px solid var(--rule-bg);
}
.topic-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;
}
.topic-card{
  background:var(--card);border:2px solid var(--rule-bg);
  border-radius:var(--radius-sm);padding:16px;cursor:pointer;
  transition:transform .15s,box-shadow .15s,border-color .15s;
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--primary);}
.topic-card.status-completed{border-color:#2ecc71;background:linear-gradient(135deg,#f0fff6,#fff);}
.topic-card.status-in-progress{border-color:#f5b301;}
html.dark .topic-card.status-completed{background:linear-gradient(135deg,#1a3328,#242836);}
.topic-status{font-size:.8rem;margin-bottom:6px;font-weight:600;}
.topic-card h3{margin:0 0 6px;font-size:1.05rem;display:flex;align-items:center;gap:6px;}
.topic-card p{margin:0;font-size:.85rem;color:var(--muted);}
.topic-progress{margin-top:8px !important;font-size:.8rem !important;font-weight:600;color:var(--text) !important;}
.topic-icon{display:inline-flex;width:1.3em;height:1.3em;color:var(--primary);}
.topic-icon svg{width:100%;height:100%;}

.coin-info{font-size:.9rem;margin-bottom:14px;}

/* Theory */
.theory-card .theory-intro{
  font-size:1.05rem;
  background:var(--rule-bg);border-left:5px solid var(--primary);
  padding:12px 16px;border-radius:10px;margin:12px 0;
}
.theory-card .theory-body{
  background:var(--rule-bg);border-radius:10px;padding:14px 18px;
  font-size:.98rem;line-height:1.7;
}
.next-theme-banner{
  margin-top:14px;padding:14px;background:#e8f8ef;border-radius:10px;
  border:1px solid #2ecc71;font-size:.95rem;
}
html.dark .next-theme-banner{background:#1a3328;border-color:#2ecc71;}

/* Task / Options */
.task-meta{display:flex;justify-content:space-between;font-size:.85rem;color:var(--muted);margin-bottom:10px;}
.q{font-size:1.25rem;font-weight:600;margin-bottom:16px;}
.options-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px;
}
.option-btn{
  background:var(--rule-bg);border:2px solid transparent;
  border-radius:var(--radius-sm);padding:14px 12px;
  font-size:1.1rem;font-weight:600;cursor:pointer;
  transition:all .15s;color:var(--text);min-height:52px;
  font-family:inherit;
}
.option-btn:hover{border-color:var(--primary);background:#e0eaff;}
html.dark .option-btn:hover{background:#2a3550;}
.option-btn.selected{
  border-color:var(--primary);background:var(--primary);color:#fff;
  box-shadow:0 4px 12px rgba(74,124,255,.3);
}

.btn-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;}
.btn-primary{
  background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);
  padding:12px 24px;font-size:1rem;font-weight:600;cursor:pointer;
  transition:background .2s,transform .15s;min-height:48px;font-family:inherit;
}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;}
.btn-ghost{
  background:transparent;border:2px solid var(--rule-bg);color:var(--text);
  border-radius:var(--radius-sm);padding:10px 18px;font-size:.95rem;
  cursor:pointer;min-height:48px;font-family:inherit;
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);}
.btn-block{width:100%;}

.task-result{padding:14px;border-radius:var(--radius-sm);margin-bottom:12px;font-size:1.05rem;}
.task-result.good{background:#e8f8ef;color:#1a7a42;}
.task-result.bad{background:#fdecea;color:#c0392b;}
html.dark .task-result.good{background:#1a3328;color:#2ecc71;}
html.dark .task-result.bad{background:#3a2020;color:#e74c3c;}
.hint-box{background:var(--hint-bg);padding:10px 14px;border-radius:8px;margin-bottom:12px;font-size:.9rem;}
.feedback{min-height:1.4em;margin-top:8px;font-weight:600;}
.feedback.bad{color:var(--bad);}

/* Shop / Inventory */
.shop-filters{margin-bottom:16px;}
.shop-filters input{
  width:100%;padding:12px 14px;border:2px solid var(--rule-bg);
  border-radius:10px;font-size:1rem;margin-bottom:10px;
  background:var(--card);color:var(--text);font-family:inherit;
}
.category-chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  background:var(--rule-bg);border:none;border-radius:999px;
  padding:8px 14px;font-size:.85rem;cursor:pointer;color:var(--text);
  min-height:40px;font-family:inherit;
}
.chip.active{background:var(--primary);color:#fff;}
.items-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;
}
.item-card{
  border:2px solid var(--rule-bg);border-radius:var(--radius-sm);
  padding:14px;transition:border-color .15s,transform .15s;
}
.item-card:hover{border-color:var(--primary);transform:translateY(-2px);}
.item-card.equipped{border-color:var(--good);}
.item-card.owned{opacity:.75;}
.item-cat{font-size:.8rem;color:var(--muted);margin-bottom:4px;}
.item-title{font-weight:700;margin-bottom:4px;}
.item-desc{font-size:.85rem;color:var(--muted);margin-bottom:8px;}
.item-price{display:flex;align-items:center;gap:4px;font-weight:600;margin-bottom:10px;}
.item-actions{display:flex;gap:8px;align-items:center;}
.btn-goal{
  background:var(--rule-bg);border:2px solid transparent;border-radius:10px;
  width:44px;height:44px;font-size:1.2rem;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
}
.btn-goal.active{border-color:var(--accent);background:#fff3d6;}
html.dark .btn-goal.active{background:#3d3420;}
.owned-label{font-size:.85rem;color:var(--good);font-weight:600;}

/* Achievements */
.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-top:12px;}
.ach-card{
  border:2px solid var(--rule-bg);border-radius:var(--radius-sm);
  padding:14px;text-align:center;opacity:.5;
}
.ach-card.unlocked{opacity:1;border-color:var(--gold);background:linear-gradient(135deg,#fffbf0,#fff);}
html.dark .ach-card.unlocked{background:linear-gradient(135deg,#3a3020,#242836);}
.ach-icon{font-size:2rem;margin-bottom:6px;}
.ach-title{font-weight:700;font-size:.95rem;}
.ach-desc{font-size:.8rem;color:var(--muted);margin:4px 0;}
.ach-reward{font-size:.85rem;display:flex;align-items:center;justify-content:center;gap:4px;}

/* Auth */
.auth-wrap{display:flex;justify-content:center;padding:40px 0;}
.auth-card{max-width:400px;width:100%;}
.auth-card h1{text-align:center;margin-top:0;}
.auth-switch{text-align:center;margin-top:16px;font-size:.9rem;}
.auth-switch a{color:var(--primary);font-weight:600;}
.gender-pick{display:flex;gap:12px;margin-bottom:16px;}
.gender-btn{
  flex:1;padding:16px;border:2px solid var(--rule-bg);border-radius:var(--radius-sm);
  background:var(--card);font-size:1.1rem;cursor:pointer;min-height:56px;
  font-family:inherit;color:var(--text);
}
.gender-btn.active{border-color:var(--primary);background:var(--rule-bg);}

.form-row{margin-bottom:14px;}
.form-row label{display:block;font-weight:600;margin-bottom:4px;font-size:.9rem;color:var(--muted);}
.form-row input{
  width:100%;padding:12px 14px;border:2px solid #cdd8ee;border-radius:10px;
  font-family:inherit;font-size:1rem;background:var(--card);color:var(--text);
  transition:border-color .2s,box-shadow .2s;min-height:48px;
}
html.dark .form-row input{border-color:#3a4055;}
.form-row input:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(74,124,255,.15);
}
.form-error{color:var(--bad);font-weight:600;min-height:1.2em;margin:8px 0;}

.stat-line{display:flex;justify-content:space-between;padding:6px 0;font-size:.95rem;}
.link-box{display:flex;gap:8px;}
.link-box input{flex:1;padding:10px;border:2px solid var(--rule-bg);border-radius:8px;font-size:.9rem;background:var(--card);color:var(--text);}
.request-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--rule-bg);}

/* Toast */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);
  background:#1f2a44;color:#fff;padding:12px 24px;border-radius:12px;
  font-weight:600;z-index:999;opacity:0;transition:all .3s;pointer-events:none;
  white-space:nowrap;max-width:90vw;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
html.dark .toast{background:#e8ecf4;color:#1f2a44;}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:500;
  display:flex;align-items:center;justify-content:center;padding:20px;
}
.modal-card{
  background:var(--card);border-radius:var(--radius);padding:28px;
  text-align:center;max-width:360px;width:100%;box-shadow:0 12px 40px rgba(0,0,0,.2);
}
.modal-card h2{margin-top:0;}

.muted{color:var(--muted);}

/* Mobile */
@media (max-width:700px){
  body{padding:10px;}
  .menu-toggle{display:flex;align-items:center;justify-content:center;}
  .desktop-nav{display:none;}
  .sticky-header{padding:10px 12px;}
  header.top h1{font-size:1rem;}
  .options-grid{grid-template-columns:1fr;}
  .option-btn{min-height:52px;font-size:1.15rem;}
  .topic-grid{grid-template-columns:1fr;}
  .character-panel{flex-direction:column;align-items:center;text-align:center;}
  .character-info{width:100%;}
  .equipped-shelf{justify-content:center;}
  .recent-ach{justify-content:center;}
  .today-grid{gap:8px;}
  .today-num{font-size:1.3rem;}
  .btn-primary,.btn-ghost{min-height:48px;padding:12px 18px;}
  .items-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:400px){
  .items-grid{grid-template-columns:1fr;}
}