*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{
  --bg:#0f0f13;--surface:#1a1a24;--card:#22223a;--accent:#7c5cfc;
  --accent2:#a78bfa;--green:#34d399;--red:#f87171;--yellow:#fbbf24;
  --text:#e4e4eb;--muted:#8888a0;--border:#2a2a3e;
  --safe-b:env(safe-area-inset-bottom,0px);
  --nav-h:64px;
  --header-h:52px;
}
html{height:-webkit-fill-available}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  background:var(--bg);color:var(--text);
  min-height:100vh;min-height:-webkit-fill-available;
  overflow-x:hidden;
  padding-bottom:calc(var(--nav-h) + var(--safe-b));
}
button{cursor:pointer;font-family:inherit;border:none;border-radius:12px;font-size:1rem;
  transition:transform .1s,opacity .1s;-webkit-user-select:none;user-select:none}
button:active{transform:scale(.95);opacity:.85}

/* === HEADER === */
header{
  position:sticky;top:0;z-index:90;
  background:var(--bg);
  padding:14px 16px 8px;
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid var(--border);
  min-height:var(--header-h);
}
header h1{font-size:1.15rem;font-weight:800;color:var(--accent2)}
header .sub-nav{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding:2px 0}
header .sub-nav::-webkit-scrollbar{display:none}
header .pill{
  padding:6px 14px;background:var(--card);color:var(--muted);
  border-radius:20px;white-space:nowrap;font-size:.8rem;font-weight:600;
  border:1.5px solid transparent;flex-shrink:0;
}
header .pill.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* === BOTTOM NAV === */
nav{
  position:fixed;bottom:0;left:0;right:0;z-index:100;
  background:var(--surface);
  border-top:1px solid var(--border);
  display:flex;
  padding-bottom:var(--safe-b);
  height:calc(var(--nav-h) + var(--safe-b));
}
nav button{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;background:none;color:var(--muted);border-radius:0;
  font-size:.65rem;font-weight:600;letter-spacing:.2px;padding:6px 2px;
  min-width:0;
}
nav button.active{color:var(--accent2)}
nav button .ico{font-size:1.35rem;line-height:1}

/* === MAIN === */
main{padding:0 0 16px}
.section{display:none;padding:16px}
.section.active{display:block}
h2{font-size:1.35rem;margin-bottom:12px;color:var(--accent2);font-weight:800}
.desc{color:var(--muted);font-size:.85rem;margin-bottom:16px;line-height:1.45}

/* === FLASHCARDS === */
.fc-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:12px}
.fc-stat{text-align:center;padding:10px 6px;background:var(--card);border-radius:12px}
.fc-stat .n{font-size:1.4rem;font-weight:800}
.fc-stat .l{font-size:.65rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}
.fc-stat.green .n{color:var(--green)}
.fc-stat.red .n{color:var(--red)}

.progress-bar{width:100%;height:5px;background:var(--card);border-radius:3px;margin-bottom:16px;overflow:hidden}
.progress-bar .fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:3px;transition:width .3s}

.fc-counter{text-align:center;font-size:.8rem;color:var(--muted);margin-bottom:8px}

.card-area{position:relative;width:100%;aspect-ratio:3/4;max-height:52vh;margin:0 auto 16px;perspective:1200px;touch-action:pan-y}
.flashcard{
  position:absolute;inset:0;cursor:pointer;
  transform-style:preserve-3d;transition:transform .45s cubic-bezier(.4,.2,.2,1);
}
.flashcard.flipped{transform:rotateY(180deg)}
.flashcard .face{
  position:absolute;inset:0;backface-visibility:hidden;
  border-radius:20px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;padding:24px 20px;text-align:center;
}
.flashcard .front{background:linear-gradient(145deg,var(--card) 0%,#2a2a4a 100%);border:1.5px solid var(--border)}
.flashcard .back{background:linear-gradient(145deg,#1a2535 0%,#2a2a4a 100%);border:1.5px solid var(--accent);transform:rotateY(180deg)}
.flashcard .cat-badge{position:absolute;top:14px;right:14px;font-size:.7rem;background:var(--accent);color:#fff;padding:3px 10px;border-radius:20px;font-weight:600}
.flashcard .article{font-size:.95rem;color:var(--accent2);font-weight:600}
.flashcard .word{font-size:2.2rem;font-weight:800;margin:4px 0;line-height:1.2}
.flashcard .tap-hint{color:var(--muted);font-size:.75rem;margin-top:auto;opacity:.6}
.flashcard .example{font-size:1rem;color:var(--muted);font-style:italic;line-height:1.6;margin-top:12px}
.flashcard .back .word{font-size:1.5rem;margin-bottom:8px}

.fc-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fc-actions button{padding:16px;font-weight:700;font-size:1rem;border-radius:14px}
.btn-dunno{background:var(--red);color:#fff}
.btn-know{background:var(--green);color:#000}

.filter-scroll{display:flex;gap:6px;overflow-x:auto;padding:2px 0 12px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.filter-scroll::-webkit-scrollbar{display:none}
.chip{
  padding:7px 14px;background:var(--card);color:var(--muted);
  border-radius:20px;white-space:nowrap;font-size:.78rem;font-weight:600;
  border:1.5px solid var(--border);flex-shrink:0;
}
.chip.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* === WORD LIST === */
.search-wrap{position:relative;margin-bottom:12px}
.search-wrap input{
  width:100%;padding:12px 16px 12px 42px;
  background:var(--card);border:1.5px solid var(--border);color:var(--text);
  border-radius:14px;font-size:1rem;font-family:inherit;
}
.search-wrap input:focus{outline:none;border-color:var(--accent)}
.search-wrap .search-ico{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:1.1rem}
.wl-count{font-size:.8rem;color:var(--muted);margin-bottom:8px}
.wl-scroll{max-height:62vh;overflow-y:auto;border-radius:16px;background:var(--card);border:1px solid var(--border);-webkit-overflow-scrolling:touch}
.wl-item{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:3px}
.wl-item:last-child{border:none}
.wl-item .w{font-weight:700;font-size:.95rem}
.wl-item .w .art{color:var(--accent2);font-weight:600}
.wl-item .ex{color:var(--muted);font-size:.82rem;line-height:1.4}

/* === GRAMMAR === */
.g-card{background:var(--card);border-radius:16px;padding:16px;margin-bottom:12px;border-left:3px solid var(--accent)}
.g-card h4{color:var(--accent2);margin-bottom:8px;font-size:1rem}
.g-card p{color:var(--muted);font-size:.85rem;line-height:1.5}
table{width:100%;border-collapse:collapse;margin:6px 0}
th,td{padding:8px 8px;text-align:left;font-size:.82rem;border-bottom:1px solid var(--border)}
th{color:var(--accent2);font-weight:700;font-size:.72rem;text-transform:uppercase;letter-spacing:.3px}
.hl{color:var(--yellow);font-weight:700}
.g-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -4px;padding:0 4px}

/* === EMAIL === */
.tmpl-hint{background:var(--surface);border-radius:14px;padding:14px;margin-bottom:16px;font-size:.88rem;color:var(--muted);border-left:3px solid var(--accent2);line-height:1.55}
.email-form{background:var(--card);border-radius:16px;padding:16px;border:1px solid var(--border)}
.email-form .field{margin-bottom:14px}
.email-form label{display:block;font-size:.72rem;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px;font-weight:600}
.email-form textarea,.email-form select{
  width:100%;background:var(--surface);border:1.5px solid var(--border);color:var(--text);
  padding:12px;border-radius:12px;font-family:inherit;font-size:1rem;
}
.email-form textarea{min-height:120px;resize:vertical}
.email-form select{-webkit-appearance:none;appearance:none}
.wc{font-size:.8rem;color:var(--muted);text-align:right;margin-top:4px}
.wc.good{color:var(--green)}.wc.over{color:var(--red)}
.email-prompt{background:var(--surface);border-radius:14px;padding:14px;margin-bottom:16px;border:1.5px dashed var(--border);cursor:pointer}
.email-prompt:active{opacity:.8}
.email-ex{background:var(--surface);border-radius:12px;padding:14px;margin:8px 0;font-size:.88rem;line-height:1.6}

/* === SPEAKING === */
.spk-card{
  background:linear-gradient(145deg,var(--card) 0%,#2a2050 100%);
  border-radius:20px;padding:28px 20px;text-align:center;margin-bottom:16px;
  border:1.5px solid var(--accent);
}
.spk-card .art{font-size:.9rem;color:var(--muted);font-weight:600}
.spk-card .wd{font-size:2.6rem;font-weight:800;color:var(--accent2);margin:8px 0 20px;line-height:1.1}
.spk-sug{background:var(--surface);border-radius:14px;padding:14px;margin:8px 0;border:1.5px solid var(--border);text-align:left}
.spk-sug:active{border-color:var(--accent);background:var(--card)}
.spk-sug .de{font-weight:700;font-size:1rem;margin-bottom:2px}
.spk-sug .en{color:var(--muted);font-size:.82rem}

/* === SELF INTRO === */
.intro-card{background:var(--card);border-radius:16px;padding:16px;margin-bottom:12px}
.intro-row{display:flex;gap:10px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--border)}
.intro-row:last-child{border:none}
.intro-num{background:var(--accent);color:#fff;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:800;flex-shrink:0}
.intro-content{flex:1;min-width:0}
.intro-de{font-weight:700;font-size:1rem;line-height:1.5}
.intro-en{color:var(--muted);font-size:.82rem;margin-top:2px}
.intro-input{
  background:var(--surface);border:1.5px solid var(--border);color:var(--yellow);
  padding:6px 10px;border-radius:8px;font-family:inherit;font-size:1rem;
  width:100%;max-width:180px;font-weight:600;
}
.intro-input:focus{outline:none;border-color:var(--accent)}
.alpha-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(56px,1fr));gap:4px}
.alpha-cell{background:var(--surface);padding:6px 4px;border-radius:8px;text-align:center;font-size:.8rem;line-height:1.3}
.alpha-cell strong{font-size:.95rem;display:block;color:var(--accent2)}
.practice-row{display:flex;align-items:center;justify-content:center;gap:16px;padding:12px 0}
.practice-num{font-size:2.5rem;font-weight:800;color:var(--accent)}
.practice-btn{background:var(--green);color:#000;padding:14px 28px;font-weight:700;font-size:1rem}

/* === W-FRAGEN === */
.wf-stats{display:flex;gap:10px;justify-content:center;margin-bottom:16px}
.wf-stat{text-align:center;padding:10px 20px;background:var(--card);border-radius:12px}
.wf-stat .n{font-size:1.4rem;font-weight:800}
.wf-stat .l{font-size:.65rem;color:var(--muted);text-transform:uppercase;margin-top:2px}
.quiz-box{background:var(--card);border-radius:16px;padding:20px;margin-bottom:16px}
.quiz-q{font-size:1.2rem;font-weight:600;margin-bottom:16px;line-height:1.4}
.quiz-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.quiz-opt{
  padding:14px;background:var(--surface);border:1.5px solid var(--border);
  border-radius:12px;text-align:center;font-weight:600;font-size:1rem;
}
.quiz-opt:active{transform:scale(.97)}
.quiz-opt.correct{background:#1a3a2a;border-color:var(--green);color:var(--green)}
.quiz-opt.wrong{background:#3a1a1a;border-color:var(--red);color:var(--red)}
.quiz-opt.disabled{pointer-events:none;opacity:.6}

/* === SCHEDULE === */
.day-card{
  background:var(--card);border-radius:14px;padding:14px 16px;margin-bottom:8px;
  display:flex;align-items:center;gap:12px;border:1.5px solid var(--border);
  cursor:pointer;transition:border-color .15s;
}
.day-card:active{opacity:.85}
.day-card.done{border-color:var(--green)}
.day-num{font-size:1.6rem;font-weight:800;color:var(--accent);min-width:36px;text-align:center}
.day-info{flex:1;min-width:0}
.day-focus{font-weight:700;font-size:.95rem}
.day-task{font-size:.8rem;color:var(--muted);margin-top:3px;line-height:1.35}
.day-check{
  width:32px;height:32px;border-radius:50%;border:2px solid var(--border);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1rem;
}
.day-card.done .day-check{background:var(--green);border-color:var(--green);color:#000}

/* === OVERVIEW === */
.ov-hero{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:20px}
.ov-hero-card{background:var(--card);border-radius:14px;padding:14px;text-align:center;border:1px solid var(--border)}
.ov-hero-card .n{font-size:1.8rem;font-weight:800;line-height:1.1}
.ov-hero-card .l{font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;margin-top:4px}
.ov-ring-wrap{display:flex;justify-content:center;margin-bottom:20px}
.ov-ring{width:140px;height:140px}
.ov-section-label{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.8px;font-weight:700;margin-bottom:8px;padding-left:4px}
.ov-actions{display:flex;flex-direction:column;gap:6px;margin-bottom:20px}
.ov-action{
  display:flex;align-items:center;gap:14px;
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:14px 16px;text-align:left;width:100%;
}
.ov-action:active{border-color:var(--accent);background:#1e1e34}
.ov-action-ico{font-size:1.4rem;flex-shrink:0;width:32px;text-align:center}
.ov-action-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:1px}
.ov-action-title{font-weight:700;font-size:.95rem;color:var(--text)}
.ov-action-sub{font-size:.78rem;color:var(--muted)}
.ov-action-arrow{color:var(--muted);font-size:1.5rem;font-weight:300;flex-shrink:0}
.ov-danger{margin-bottom:24px}
.ov-danger-btn{
  width:100%;padding:14px 16px;background:transparent;
  border:1.5px solid var(--red);border-radius:14px;color:var(--red);
  font-weight:700;font-size:.95rem;display:flex;align-items:center;justify-content:center;gap:8px;
}
.ov-danger-btn:active{background:rgba(248,113,113,.1)}
.ov-danger-hint{font-size:.75rem;color:var(--muted);margin-top:8px;text-align:center;line-height:1.4}

/* Confirm modal */
.ov-modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:200;
  display:flex;align-items:flex-end;justify-content:center;
  padding:16px;animation:fadeIn .15s;
}
.ov-modal{
  background:var(--surface);border-radius:20px;padding:24px 20px 20px;
  width:100%;max-width:400px;text-align:center;
  animation:slideUp .2s cubic-bezier(.4,.2,.2,1);
}
.ov-modal h3{font-size:1.1rem;margin-bottom:8px;color:var(--text)}
.ov-modal p{font-size:.88rem;color:var(--muted);margin-bottom:20px;line-height:1.45}
.ov-modal-actions{display:flex;gap:10px}
.ov-modal-actions button{flex:1;padding:14px;font-weight:700;border-radius:12px;font-size:.95rem}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{transform:translateY(40px);opacity:0}to{transform:translateY(0);opacity:1}}

/* === FULL-WIDTH BTN === */
.btn-full{width:100%;padding:16px;font-weight:700;font-size:1rem;border-radius:14px;background:var(--accent);color:#fff}
.btn-full:active{transform:scale(.98)}

/* === ATTRIBUTION === */
.attribution{text-align:center;padding:16px;font-size:.72rem;color:var(--muted);line-height:1.5}
.attribution a{color:var(--accent2);text-decoration:none}
.attribution a:hover{text-decoration:underline}

/* === DESKTOP (scale up) === */
@media(min-width:640px){
  body{padding-bottom:0}
  nav{position:static;border-top:none;border-bottom:1px solid var(--border);height:auto;padding:0}
  nav button{flex-direction:row;gap:8px;padding:14px 6px;font-size:.85rem}
  nav button .ico{font-size:1.1rem}
  main{max-width:600px;margin:0 auto}
  .section{padding:24px}
  .card-area{max-height:400px;aspect-ratio:4/5}
  .flashcard .word{font-size:2.8rem}
  .fc-actions{max-width:400px;margin:0 auto}
}
@media(min-width:900px){
  main{max-width:700px}
  .fc-stats{grid-template-columns:repeat(3,1fr)}
}