:root {
  --bg: #0a0a0f; --surface: #111118; --surface2: #18181f;
  --border: rgba(255,255,255,0.06); --border-hover: rgba(255,255,255,0.10);
  --text: #f1f1f5; --text2: #8888a0; --text3: #5a5a70;
  --accent: #6366f1; --accent2: #818cf8; --green: #34d399; --amber: #f59e0b; --red: #f87171;
  --font: 'Inter',sans-serif; --font-display: 'Plus Jakarta Sans',sans-serif;
  --radius: 14px; --radius-sm: 10px; --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.3);
}
.light {
  --bg: #f4f4f6; --surface: #ffffff; --surface2: #f0f0f3;
  --border: rgba(0,0,0,0.05); --border-hover: rgba(0,0,0,0.08);
  --text: #111118; --text2: #666680; --text3: #9999aa;
  --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.06);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;padding:80px 0 60px;line-height:1.6;transition:background 0.3s,color 0.3s}
.bg-gradient{position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(99,102,241,0.06),transparent),radial-gradient(ellipse 50% 50% at 80% 100%,rgba(129,140,248,0.04),transparent)}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-thumb{background:var(--border-hover);border-radius:4px}

.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(10,10,15,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:10px 14px}
.light .header{background:rgba(255,255,255,0.85)}
.header-inner{max-width:700px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:6px;flex-wrap:nowrap}
.logo{flex-shrink:0}
.logo svg{width:120px;height:auto}
.header-right{display:flex;align-items:center;gap:3px;flex-shrink:0;flex-wrap:nowrap}
#userName{max-width:60px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:inline-block}
.streak-pill{display:flex;align-items:center;gap:4px;background:rgba(245,158,11,0.08);border:1px solid rgba(245,158,11,0.15);color:var(--amber);padding:4px 8px;border-radius:100px;font-weight:700;font-size:0.7rem;white-space:nowrap}
.btn-icon{width:30px;height:30px;border-radius:50%;border:1px solid var(--border);background:transparent;color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all 0.2s;font-size:0.8rem;flex-shrink:0}
.btn-icon:hover{background:var(--surface2);color:var(--text);border-color:var(--border-hover)}
.btn-icon-sm{width:26px;height:26px;border-radius:7px;border:1px solid var(--border);background:transparent;color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all 0.2s;font-size:0.7rem;flex-shrink:0}
.btn-icon-sm:hover{background:var(--surface2);color:var(--text)}
.modal-overlay{position:fixed;inset:0;z-index:400;background:rgba(0,0,0,0.7);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center}
.modal-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px 20px;width:92%;max-width:400px;position:relative;box-shadow:var(--shadow)}
.search-overlay{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,0.5);backdrop-filter:blur(4px);display:flex;align-items:flex-start;justify-content:center;padding-top:100px}
.search-modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);width:92%;max-width:480px;padding:20px;box-shadow:var(--shadow)}
.search-head{display:flex;align-items:center;gap:10px}
.search-head input{flex:1;background:none;border:none;color:var(--text);font-size:0.95rem;outline:none;font-family:var(--font)}
.search-results{margin-top:14px;max-height:260px;overflow-y:auto;display:flex;flex-direction:column;gap:6px}
.search-item{padding:10px 14px;border-radius:var(--radius-sm);cursor:pointer;transition:all 0.15s;font-size:0.85rem}
.search-item:hover{background:var(--surface2)}
.main{max-width:680px;margin:0 auto;padding:0 20px}
.hero{text-align:center;padding:24px 0 18px}
.hero-title{font-family:var(--font-display);font-size:clamp(1.7rem,4.5vw,2.5rem);font-weight:800;letter-spacing:-0.5px;line-height:1.2}
.text-gradient{background:linear-gradient(135deg,var(--accent),var(--accent2),#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{color:var(--text2);margin-top:4px;font-size:0.9rem}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 22px;margin-bottom:12px;transition:all 0.2s}
.card:hover{border-color:var(--border-hover)}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.section-head h3{font-family:var(--font-display);font-size:0.9rem}
.tabs{display:flex;gap:2px;background:var(--surface2);border-radius:100px;padding:3px;margin-bottom:16px;overflow-x:auto}
.tab{flex:1;padding:8px 10px;border:none;background:none;color:var(--text2);border-radius:100px;font-weight:600;font-size:0.78rem;cursor:pointer;transition:all 0.2s;display:flex;align-items:center;justify-content:center;gap:4px;white-space:nowrap;min-width:fit-content}
.tab.active{background:var(--surface);color:var(--text);box-shadow:0 1px 2px rgba(0,0,0,0.2)}
.tab i.fa-youtube{color:#ff0000}
.tab.active i.fa-youtube{color:#ff0000}
.field-row{display:flex;gap:8px;margin-bottom:10px;flex-wrap:wrap}
.field{padding:11px 14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-family:var(--font);font-size:0.85rem;outline:none;transition:all 0.2s;width:100%}
.field:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,0.08)}
.text-input{flex:2;min-width:140px}
.select{flex:1;min-width:130px;cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238888a0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}
.textarea-wrap{position:relative}
.textarea{width:100%;padding:12px 14px 36px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-family:var(--font);font-size:0.85rem;resize:vertical;min-height:140px;outline:none;line-height:1.7;transition:all 0.2s}
.textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,0.08)}
.counter{position:absolute;bottom:6px;right:12px;font-size:0.7rem;color:var(--text3);font-weight:500}
#panelYouTube .field:focus{border-color:#ff0000;box-shadow:0 0 0 3px rgba(255,0,0,0.1)}
#panelYouTube .btn-accent{background:linear-gradient(135deg,#ff0000,#cc0000)}
.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:40px 18px;text-align:center;cursor:pointer;transition:all 0.2s}
.dropzone:hover{border-color:var(--accent)}
.dropzone i{font-size:2rem;color:var(--accent);margin-bottom:8px}
.dropzone p{font-weight:600;margin-bottom:2px;font-size:0.85rem}
.dropzone small{color:var(--text3);font-size:0.75rem}
.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(75px,1fr));gap:6px;margin-bottom:10px}
.photo-item{aspect-ratio:1;border-radius:var(--radius-sm);overflow:hidden;position:relative}
.photo-item img{width:100%;height:100%;object-fit:cover}
.photo-item .del{position:absolute;top:2px;right:2px;width:20px;height:20px;border-radius:50%;background:rgba(0,0,0,0.7);color:#fff;border:none;cursor:pointer;font-size:0.65rem;display:flex;align-items:center;justify-content:center}
.voice-area{text-align:center}
.voice-circle{width:56px;height:56px;border-radius:50%;background:var(--surface2);display:flex;align-items:center;justify-content:center;margin:0 auto 10px;transition:all 0.3s}
.voice-circle i{font-size:1.1rem;color:var(--accent)}
.voice-circle.recording{background:rgba(239,68,68,0.08);animation:pulse 1.8s infinite}
.voice-circle.recording i{color:var(--red)}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
.voice-btns{display:flex;gap:6px;justify-content:center;margin:8px 0}
.voice-result{margin-top:6px;width:100%;min-height:50px}
.btn{padding:9px 14px;border-radius:100px;border:none;font-weight:600;font-size:0.82rem;font-family:var(--font);cursor:pointer;transition:all 0.2s;display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent2);box-shadow:0 4px 14px rgba(99,102,241,0.25)}
.btn-secondary{background:var(--surface2);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{background:var(--surface);border-color:var(--border-hover)}
.btn-danger{background:var(--red);color:#fff}
.btn-sm{padding:5px 10px;font-size:0.72rem}
.btn-text{background:none;border:none;color:var(--accent);font-weight:600;cursor:pointer;font-size:0.78rem;font-family:var(--font)}
.btn-text:hover{color:var(--accent2)}
.btn-text-danger{background:none;border:none;color:var(--red);font-weight:500;cursor:pointer;font-size:0.72rem;font-family:var(--font);opacity:0.7}
.btn-text-danger:hover{opacity:1}
.actions{display:flex;gap:6px;margin-top:14px}
.actions .btn{flex:1;justify-content:center}
.spinner{width:26px;height:26px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin 0.7s linear infinite;margin:0 auto}
@keyframes spin{to{transform:rotate(360deg)}}
.result-head{display:flex;align-items:center;gap:8px;margin-bottom:14px;flex-wrap:wrap}
.result-badge{padding:3px 10px;border-radius:100px;font-size:0.65rem;font-weight:700;text-transform:uppercase;letter-spacing:0.5px;color:#fff;white-space:nowrap}
.result-title{font-family:var(--font-display);font-size:1rem;font-weight:700;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:180px}
.result-actions{display:flex;gap:2px;flex-wrap:wrap}
.result-body{line-height:1.8;font-size:0.85rem}
.result-body h3{font-weight:700;color:var(--accent2);margin:12px 0 4px;font-size:0.9rem}
.result-body ul{padding-left:16px;margin:5px 0}
.result-body strong{color:var(--amber)}
.result-body .qa{background:var(--surface2);padding:10px 12px;border-radius:var(--radius-sm);margin-bottom:6px}
.result-body .qa .q{font-weight:700;margin-bottom:3px}
.result-body .day{background:var(--surface2);border-left:3px solid var(--green);padding:8px 12px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin-bottom:6px}
.result-body .day strong{color:var(--green)}
.flash-view{display:flex;align-items:center;gap:8px}
.flash-card{flex:1;min-height:110px;background:var(--surface2);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;text-align:center;padding:16px;cursor:pointer;font-weight:600;font-size:0.9rem}
.msg{padding:6px 10px;border-radius:10px;max-width:82%;font-size:0.8rem;line-height:1.5;margin-bottom:4px}
.msg.bot{background:var(--surface);border:1px solid var(--border)}
.msg.user{background:var(--accent);color:#fff;margin-left:auto}
.focus-overlay{position:fixed;inset:0;z-index:300;background:rgba(0,0,0,0.85);display:flex;align-items:center;justify-content:center;backdrop-filter:blur(6px)}
.focus-modal{text-align:center;padding:24px}
.focus-ring{width:140px;height:140px;margin:0 auto 16px;position:relative}
.focus-ring svg{width:100%;height:100%}
.focus-ring circle{transition:stroke-dashoffset 1s linear}
.focus-time{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:2rem;font-weight:700}
.focus-btns{display:flex;gap:6px;justify-content:center;margin-bottom:8px}
.focus-stats{color:var(--text2);font-size:0.8rem}
.streak-num{font-weight:700;color:var(--amber);font-size:0.8rem}
.streak-grid{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin:10px 0}
.streak-dot{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.6rem;font-weight:700;background:var(--surface2);color:var(--text3);transition:all 0.2s}
.streak-dot.on{background:var(--amber);color:#000;box-shadow:0 0 12px rgba(245,158,11,0.3)}
.streak-dot.today{border:2px solid var(--accent)}
.streak-msg{text-align:center;color:var(--amber);font-weight:600;font-size:0.82rem}
.achieve-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.achieve-item{padding:8px 5px;text-align:center;border-radius:var(--radius-sm);background:var(--surface2);border:1px solid var(--border);transition:all 0.2s}
.achieve-item.earned{border-color:rgba(245,158,11,0.3);background:rgba(245,158,11,0.05)}
.achieve-item i{font-size:1rem;margin-bottom:3px;display:block}
.achieve-item.earned i{color:var(--amber)}
.achieve-item.locked i{color:var(--text3)}
.achieve-item span{font-size:0.55rem;font-weight:600;display:block;line-height:1.2}
.achieve-item small{font-size:0.5rem;color:var(--text3)}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.stat{text-align:center;padding:8px 5px;background:var(--surface2);border-radius:var(--radius-sm)}
.stat span{display:block;font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--accent)}
.stat small{color:var(--text3);font-size:0.6rem}
.saved-item{padding:10px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:all 0.15s;margin-bottom:3px;display:flex;justify-content:space-between;gap:6px}
.saved-item:hover{background:var(--surface2)}
.saved-item strong{color:var(--accent);font-size:0.82rem}
.saved-item span{color:var(--text3);font-size:0.7rem;white-space:nowrap}
.empty{text-align:center;color:var(--text3);padding:18px;font-size:0.8rem}
.install-bar{position:fixed;bottom:12px;left:50%;transform:translateX(-50%);z-index:150;background:var(--surface);border:1px solid var(--border);border-radius:100px;padding:6px 16px;display:flex;align-items:center;gap:8px;box-shadow:var(--shadow);font-size:0.75rem}
footer{text-align:center;padding:20px 0 10px;color:var(--text3);font-size:0.7rem}
footer strong{color:var(--text2)}
footer .fa-rocket{color:var(--accent)}

@media(max-width:600px){
  body{padding-top:70px}
  .header{padding:8px 10px}
  .logo svg{width:100px}
  .hero-title{font-size:1.6rem}
  .card{padding:14px 12px}
  .field-row{flex-direction:column}
  .field-row .field{width:100%;min-width:unset;flex:unset}
  .achieve-grid{grid-template-columns:repeat(2,1fr)}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .actions{flex-direction:column}
  .focus-ring{width:120px;height:120px}
  .focus-time{font-size:1.8rem}
  .tabs{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .tab{flex-shrink:0;padding:7px 10px;font-size:0.7rem}
  .header-right .btn-sm{padding:4px 8px;font-size:0.65rem}
  .header-right .btn-icon{width:26px;height:26px;font-size:0.7rem}
  .streak-pill{padding:3px 6px;font-size:0.65rem}
}