:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --surface2: #0f3460;
  --surface3: #1a1a3e;
  --accent: #534AB7;
  --accent-light: #7c75d4;
  --accent2: #f7a000;
  --correct-light: #52b788;
  --correct-bg: #1b4332;
  --wrong: #c1121f;
  --wrong-bg: #7d0000;
  --text: #ffffff;
  --text2: #ccccdd;
  --text3: #8888aa;
  --border: #2a2a4a;
  --radius: 12px;
  --radius-sm: 8px;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden;background:#111122}
body{font-family:'DM Sans',sans-serif;color:var(--text);font-size:16px;line-height:1.5}
#app{width:100%;max-width:430px;height:100vh;margin:0 auto;position:relative;overflow:hidden;background:var(--bg)}
.screen{position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}
.screen::-webkit-scrollbar{display:none}
.hidden{display:none!important}

/* AUTH */
#screen-auth{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 28px;background:var(--bg)}
.auth-logo{text-align:center;margin-bottom:40px}
.app-name{font-size:26px;font-weight:700;color:var(--text);margin-bottom:6px}
.app-tagline{font-size:13px;color:var(--text3)}
.form-toggle{display:flex;background:var(--surface2);border-radius:var(--radius);padding:4px;margin-bottom:16px;width:100%}
.toggle-btn{flex:1;padding:10px;border:none;border-radius:9px;background:transparent;color:var(--text3);font-family:'DM Sans',sans-serif;font-size:14px;font-weight:600;cursor:pointer;transition:all 0.2s}
.toggle-btn.active{background:var(--accent);color:white}
.form-input{width:100%;padding:14px 16px;margin-bottom:12px;background:var(--surface2);border:1.5px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:'DM Sans',sans-serif;font-size:15px;outline:none;transition:border-color 0.2s}
.form-input:focus{border-color:var(--accent)}
.form-input::placeholder{color:var(--text3)}
.auth-error{color:#f87171;font-size:13px;margin-bottom:10px;min-height:18px;text-align:center}
.btn-primary{width:100%;padding:15px;border:none;border-radius:var(--radius);background:var(--accent);color:white;font-family:'DM Sans',sans-serif;font-size:16px;font-weight:700;cursor:pointer;transition:transform 0.15s,opacity 0.15s}
.btn-primary:active{transform:scale(0.97)}
.btn-ghost{width:100%;padding:14px;border:1.5px solid var(--border);background:transparent;color:var(--text2);font-family:'DM Sans',sans-serif;font-size:14px;border-radius:var(--radius);cursor:pointer;margin-top:10px;transition:border-color 0.2s}
.btn-ghost:hover{border-color:var(--accent)}

/* HOME */
#screen-home{padding:0 24px 100px;background:var(--bg)}
.home-header{display:flex;align-items:center;justify-content:space-between;padding:52px 0 20px}
.home-user{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:white}
.home-username{font-size:15px;font-weight:600}
.home-sub{font-size:12px;color:var(--text3)}
.icon-btn{width:36px;height:36px;border-radius:8px;border:1.5px solid var(--border);background:transparent;color:var(--text3);font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.hero-card{background:var(--surface);border-radius:20px;padding:22px;margin-bottom:22px;border:1px solid var(--border)}
.hero-date{font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}
.hero-title{font-size:20px;font-weight:700;margin-bottom:14px}
.hero-stats{display:flex;align-items:center;margin-bottom:18px}
.hero-stat{flex:1;text-align:center}
.hero-stat-num{display:block;font-size:24px;font-weight:700;color:var(--accent-light)}
.hero-stat-label{font-size:10px;color:var(--text3);text-transform:uppercase;letter-spacing:0.5px}
.hero-divider{width:1px;height:30px;background:var(--border)}
.btn-play{width:100%;padding:15px;border:none;border-radius:var(--radius);background:var(--accent);color:white;font-family:'DM Sans',sans-serif;font-size:15px;font-weight:700;cursor:pointer;transition:transform 0.15s;margin-bottom:10px}
.btn-play:active{transform:scale(0.97)}
.btn-outline-secondary{width:100%;padding:13px;border:1.5px solid var(--border);background:transparent;color:var(--text2);font-family:'DM Sans',sans-serif;font-size:14px;font-weight:500;border-radius:var(--radius);cursor:pointer;transition:border-color 0.2s}
.btn-outline-secondary:hover{border-color:var(--accent)}
.already-played{display:flex;justify-content:space-between;align-items:center;background:var(--surface2);border-radius:var(--radius);padding:13px 15px;color:var(--text2);font-size:14px;font-weight:600;margin-bottom:10px}
.section-title{font-size:16px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.section-sub{font-size:13px;color:var(--text3);font-weight:400}
.lb-preview{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}
.btn-outline{width:100%;padding:13px;border:1.5px solid var(--border);background:transparent;color:var(--text2);font-family:'DM Sans',sans-serif;font-size:14px;font-weight:500;border-radius:var(--radius);cursor:pointer;transition:border-color 0.2s}
.btn-outline:hover{border-color:var(--accent)}

/* GAME */
#screen-game{padding:0;display:flex;flex-direction:column;background:var(--bg);height:100%;overflow:hidden}
.game-top{display:flex;align-items:center;gap:12px;padding:52px 20px 10px;flex-shrink:0}
.progress-track{flex:1;height:5px;background:var(--surface2);border-radius:3px;overflow:hidden}
.progress-fill{height:100%;background:var(--accent);border-radius:3px;transition:width 0.4s ease}
.progress-label{font-size:12px;color:var(--text3);white-space:nowrap}
.game-score-wrap{text-align:right;flex-shrink:0}
.game-score-label{font-size:10px;color:var(--text3);display:block}
.game-score{font-size:18px;font-weight:700;color:var(--accent-light)}
.timer-section{display:flex;justify-content:center;padding:4px 20px 8px;flex-shrink:0}
.timer-ring-wrap{position:relative;width:52px;height:52px}
.timer-ring{width:52px;height:52px;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:var(--surface2);stroke-width:5}
.ring-fg{fill:none;stroke:var(--accent);stroke-width:5;stroke-linecap:round;stroke-dasharray:141.4;stroke-dashoffset:0;transition:stroke-dashoffset 0.1s linear,stroke 0.3s}
.timer-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;color:var(--text)}
.question-wrap{padding:6px 20px 14px;flex-shrink:0}
.question-cat{display:inline-block;padding:3px 10px;border-radius:20px;background:var(--surface2);font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:8px}
.question-text{font-size:18px;font-weight:600;line-height:1.4;color:var(--accent-light)}
.answers-grid{padding:0 20px;display:flex;flex-direction:column;gap:9px;flex:1}
.answer-btn{width:100%;padding:13px 15px;border-radius:var(--radius);border:1.5px solid var(--border);background:var(--surface);color:var(--text);font-family:'DM Sans',sans-serif;font-size:14px;font-weight:500;cursor:pointer;text-align:left;display:flex;align-items:center;gap:12px;transition:border-color 0.15s,background 0.15s}
.answer-btn:hover:not(:disabled){border-color:var(--accent);background:rgba(83,74,183,0.15)}
.answer-btn:disabled{cursor:default}
.answer-btn.correct{border-color:var(--correct-light);background:rgba(82,183,136,0.15);color:var(--correct-light)}
.answer-btn.wrong{border-color:var(--wrong);background:rgba(193,18,31,0.15);color:#f87171}
.answer-btn.reveal{border-color:var(--correct-light);background:rgba(82,183,136,0.08)}
.answer-letter{width:28px;height:28px;border-radius:6px;flex-shrink:0;background:var(--surface2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--text3)}
.answer-btn.correct .answer-letter{background:var(--correct-light);color:#000;border-color:var(--correct-light)}
.answer-btn.wrong .answer-letter{background:var(--wrong);color:#fff;border-color:var(--wrong)}
.answer-btn.reveal .answer-letter{background:var(--correct-light);color:#000;border-color:var(--correct-light)}

/* FEEDBACK OVERLAY - full screen like Figma */
.feedback-overlay{position:absolute;inset:0;z-index:50;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:fadeInFb 0.2s ease}
@keyframes fadeInFb{from{opacity:0}to{opacity:1}}
.feedback-overlay.correct{background:#1b4332}
.feedback-overlay.wrong{background:#7d0000}
.feedback-icon{font-size:72px;margin-bottom:16px}
.feedback-title{font-size:22px;font-weight:700;color:white;margin-bottom:8px}
.feedback-sub{font-size:13px;color:rgba(255,255,255,0.7);margin-bottom:28px;text-align:center;padding:0 28px;line-height:1.5}
.feedback-next-btn{padding:13px 32px;border:none;border-radius:var(--radius);font-family:'DM Sans',sans-serif;font-size:15px;font-weight:700;cursor:pointer;transition:transform 0.15s}
.feedback-next-btn:active{transform:scale(0.97)}
.feedback-overlay.correct .feedback-next-btn{background:#52b788;color:#000}
.feedback-overlay.wrong .feedback-next-btn{background:#e63946;color:#fff}

/* RESULTS */
#screen-results{padding:0 24px 100px;background:var(--bg)}
.results-scroll{padding-top:56px}
.results-hero{text-align:center;margin-bottom:24px}
.results-big-score{font-size:76px;font-weight:700;line-height:1;color:var(--accent-light);animation:pop 0.5s cubic-bezier(0.34,1.56,0.64,1)}
@keyframes pop{from{transform:scale(0.5);opacity:0}to{transform:scale(1);opacity:1}}
.results-score-label{font-size:13px;color:var(--text3);margin-top:4px}
.results-correct{font-size:14px;color:var(--text2);margin-top:6px}
.rank-pill{display:inline-block;margin-top:12px;padding:7px 18px;border-radius:20px;background:var(--accent);color:white;font-size:14px;font-weight:700}
.results-breakdown{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);padding:14px;margin-bottom:14px}
.breakdown-header{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--text3);margin-bottom:10px}
.breakdown-row{display:flex;align-items:center;justify-content:space-between;padding:7px 0;border-bottom:1px solid var(--border);font-size:13px}
.breakdown-row:last-child{border-bottom:none}
.breakdown-q{color:var(--text2);flex:1;margin-right:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.breakdown-pts{font-weight:700;flex-shrink:0}
.breakdown-pts.c{color:var(--correct-light)}
.breakdown-pts.w{color:#f87171}
.share-btn{width:100%;padding:15px;border:none;border-radius:var(--radius);background:var(--accent);color:white;font-family:'DM Sans',sans-serif;font-size:15px;font-weight:700;cursor:pointer;margin-bottom:10px;transition:transform 0.15s}
.share-btn:active{transform:scale(0.97)}
.upgrade-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;margin-bottom:10px;text-align:center}
.upgrade-card-title{font-size:12px;color:var(--text3);margin-bottom:8px}
.upgrade-card-btn{width:100%;padding:11px;border:none;border-radius:var(--radius-sm);background:var(--accent);color:white;font-family:'DM Sans',sans-serif;font-size:14px;font-weight:600;cursor:pointer}
.next-game-wrap{text-align:center;padding:14px 0 4px}
.next-label{font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}
.next-countdown{font-size:26px;font-weight:700;color:var(--text);letter-spacing:2px}

/* LEADERBOARD */
#screen-lb{padding:0 0 100px;background:var(--bg)}
.lb-header{display:flex;align-items:center;gap:12px;padding:52px 20px 12px}
.back-btn{width:36px;height:36px;border-radius:8px;border:1.5px solid var(--border);background:transparent;color:var(--text2);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.lb-title{font-size:22px;font-weight:700}
.lb-tabs{display:flex;gap:4px;padding:0 20px 14px}
.lb-tab{flex:1;padding:9px;border-radius:8px;border:1.5px solid var(--border);background:transparent;color:var(--text3);font-family:'DM Sans',sans-serif;font-size:13px;font-weight:600;cursor:pointer;transition:all 0.2s}
.lb-tab.active{background:var(--accent);border-color:var(--accent);color:white}
.lb-full{padding:0 20px;display:flex;flex-direction:column;gap:8px}
.lb-row{display:flex;align-items:center;gap:10px;background:var(--surface);border-radius:var(--radius);padding:10px 12px;border:1.5px solid var(--border)}
.lb-row.you{border-color:var(--accent);background:rgba(83,74,183,0.15)}
.lb-rank{font-size:15px;font-weight:700;width:22px;text-align:center}
.lb-rank.g{color:#ffd700}
.lb-rank.s{color:#c0c0c0}
.lb-rank.b{color:#cd7f32}
.lb-rank.n{color:var(--text3)}
.lb-av{width:32px;height:32px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;color:white}
.lb-info{flex:1;min-width:0}
.lb-name{font-size:14px;font-weight:600}
.lb-meta{font-size:11px;color:var(--text3)}
.lb-score-wrap{text-align:right}
.lb-pts{font-size:17px;font-weight:700;color:var(--text)}
.lb-pts-label{font-size:10px;color:var(--text3)}

/* PROFILE */
#screen-profile{padding:0 24px 100px;background:var(--bg)}
.profile-header{text-align:center;padding:56px 0 20px}
.profile-avatar{width:68px;height:68px;border-radius:50%;margin:0 auto 10px;background:var(--accent-light);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;color:white}
.profile-name{font-size:18px;font-weight:700;color:var(--accent-light)}
.profile-streak{font-size:34px;font-weight:700;color:var(--accent2);margin:6px 0 2px}
.profile-streak-label{font-size:12px;color:var(--text3);margin-bottom:16px}
.profile-stats{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin-bottom:18px}
.profile-stat-card{background:var(--surface);border-radius:var(--radius-sm);border:1px solid var(--border);padding:12px 6px;text-align:center}
.psc-num{font-size:18px;font-weight:700;color:var(--text)}
.psc-label{font-size:10px;color:var(--text3);margin-top:2px}
.pro-banner{background:var(--accent);border-radius:var(--radius);padding:18px;display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.pro-title{font-size:14px;font-weight:700;color:white}
.pro-sub{font-size:11px;color:rgba(255,255,255,0.7);margin-top:2px}
.pro-btn{background:white;color:var(--accent);border:none;padding:8px 14px;border-radius:8px;font-weight:700;font-size:13px;cursor:pointer}
.profile-links{text-align:center;margin-top:12px}
.profile-link{background:none;border:none;color:var(--text3);font-size:14px;cursor:pointer;padding:8px 16px;font-family:'DM Sans',sans-serif}
.profile-link:hover{color:var(--text)}

/* SUBSCRIBE */
#screen-subscribe{padding:0 24px 100px;background:var(--bg)}
.sub-header{padding:52px 0 20px;text-align:center}
.sub-title{font-size:20px;font-weight:700;margin-bottom:6px}
.sub-sub{font-size:13px;color:var(--text3)}
.plans-row{display:flex;gap:10px;margin-bottom:18px}
.plan-card{flex:1;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);padding:14px;position:relative}
.plan-card.featured{border-color:var(--accent)}
.plan-badge{position:absolute;top:-10px;right:8px;background:var(--accent2);color:#000;font-size:10px;font-weight:700;padding:2px 8px;border-radius:10px}
.plan-price{font-size:24px;font-weight:700;color:var(--accent-light)}
.plan-period{font-size:12px;color:var(--text3);margin-bottom:6px}
.plan-save{font-size:12px;color:var(--correct-light);margin-bottom:6px}
.plan-features{font-size:12px;color:var(--text2);line-height:1.8}
.sub-btn{width:100%;padding:15px;border:none;border-radius:var(--radius);background:var(--accent);color:white;font-family:'DM Sans',sans-serif;font-size:15px;font-weight:700;cursor:pointer;margin-bottom:8px;transition:transform 0.15s}
.sub-btn:active{transform:scale(0.97)}
.sub-cancel{text-align:center;font-size:12px;color:var(--text3);margin-bottom:16px}
.sub-back{background:none;border:none;color:var(--text3);font-size:14px;cursor:pointer;font-family:'DM Sans',sans-serif;width:100%;text-align:center;padding:8px}

/* NAV */
.bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:430px;display:flex;background:var(--surface);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom);z-index:100}
.nav-btn{flex:1;padding:12px 8px 14px;border:none;background:transparent;color:var(--text3);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;transition:color 0.2s;font-family:'DM Sans',sans-serif}
.nav-btn.active{color:var(--accent-light)}
.nav-icon{font-size:20px;line-height:1}
.nav-btn i{display:block;margin-bottom:3px}
.nav-btn.active i{color:var(--accent-light)}
.nav-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px}
.lb-row-small{display:flex;align-items:center;gap:10px;background:var(--surface);border-radius:10px;padding:10px 12px;border:1.5px solid var(--border)}
.lb-row-small.you{border-color:var(--accent)}

/* ── AVATAR PICKER ── */
.avatar-option {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  cursor: pointer;
  border: 3px solid transparent;
  transition: border-color 0.2s, transform 0.15s;
  background: var(--surface2);
}
.avatar-option:hover { transform: scale(1.1); }
.avatar-option.selected { border-color: var(--accent-light); transform: scale(1.1); }
.avatar-option.locked {
  opacity: 0.4;
  cursor: default;
  position: relative;
}
.avatar-option.locked::after {
  content: '🔒';
  position: absolute;
  font-size: 14px;
  bottom: -2px;
  right: -2px;
}