/* ============================================================
   VERBLY DESIGN SYSTEM v1.0
   German learning platform — modern minimalism
   Fonts: Sora (display) / Inter (UI)
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root{
  /* palette */
  --bg:#F7F7F3;
  --surface:#FFFFFF;
  --ink:#17171F;
  --ink-2:#43434E;
  --muted:#6E6E7A;
  --line:#E8E8E2;
  --line-strong:#D9D9D2;

  --primary:#5B5BD6;
  --primary-deep:#4747C2;
  --primary-soft:#EDEDFB;
  --primary-ghost:#F5F5FD;

  --amber:#E8A03B;
  --amber-soft:#FBF1DF;
  --success:#3E9B6E;
  --success-soft:#E7F4ED;
  --error:#D6564F;
  --error-soft:#FBEBEA;
  --info:#4A90C2;
  --info-soft:#E8F1F8;

  --dark:#1D1D2B;
  --dark-2:#26263A;
  --on-dark:#F5F5F2;
  --on-dark-muted:#9C9CB0;

  /* shape & depth */
  --r-lg:20px; --r-md:14px; --r-sm:10px; --r-full:999px;
  --shadow-sm:0 1px 2px rgba(23,23,31,.05);
  --shadow-md:0 6px 24px rgba(23,23,31,.07);
  --shadow-lg:0 16px 48px rgba(23,23,31,.12);

  --font-display:'Sora',sans-serif;
  --font-ui:'Inter',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{
  font-family:var(--font-ui);
  background:var(--bg);
  color:var(--ink);
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ---------- typography ---------- */
.h1,.h2,.h3,.h4{font-family:var(--font-display);font-weight:700;line-height:1.2;letter-spacing:-.01em}
.h1{font-size:34px}
.h2{font-size:26px}
.h3{font-size:20px}
.h4{font-size:16px}
.display{font-family:var(--font-display);font-weight:800;font-size:48px;line-height:1.1;letter-spacing:-.02em}
.muted{color:var(--muted)}
.small{font-size:13px}
.tiny{font-size:11.5px;letter-spacing:.04em;text-transform:uppercase;font-weight:600;color:var(--muted)}
.de{font-weight:600;color:var(--primary-deep)}
b,strong{font-weight:600}

/* ---------- logo ---------- */
.logo{font-family:var(--font-display);font-weight:800;font-size:22px;letter-spacing:-.02em;display:inline-flex;align-items:center;gap:9px;white-space:nowrap}
.logo .word{display:inline}
.logo .mark{width:30px;height:30px;border-radius:9px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:16px;font-weight:800}
.logo .umlaut{color:var(--primary)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;border-radius:var(--r-md);padding:12px 22px;transition:.15s;border:1.5px solid transparent;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 2px 0 var(--primary-deep)}
.btn-primary:hover{background:var(--primary-deep)}
.btn-dark{background:var(--dark);color:var(--on-dark)}
.btn-ghost{background:var(--surface);border-color:var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-soft{background:var(--primary-soft);color:var(--primary-deep)}
.btn-success{background:var(--success);color:#fff}
.btn-lg{padding:16px 30px;font-size:16px;border-radius:16px}
.btn-sm{padding:8px 14px;font-size:13.5px;border-radius:10px}
.btn-block{width:100%}
.btn-icon{padding:10px;border-radius:12px;background:var(--surface);border:1.5px solid var(--line)}

/* ---------- pills / stats ---------- */
.pill{display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:var(--r-full);background:var(--surface);border:1.5px solid var(--line);font-weight:600;font-size:13.5px}
.pill .ico{font-size:15px}
.pill-streak{color:#C97A16;background:var(--amber-soft);border-color:#F2DDB4}
.pill-xp{color:var(--primary-deep);background:var(--primary-soft);border-color:#D8D8F4}
.pill-hearts{color:var(--error);background:var(--error-soft);border-color:#F2CFCC}
.pill-gems{color:var(--info);background:var(--info-soft);border-color:#CCE0EF}

/* ---------- badges & tags ---------- */
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:var(--r-full);font-size:11.5px;font-weight:700;letter-spacing:.03em}
.badge-level{background:var(--dark);color:#fff}
.badge-soft{background:var(--primary-soft);color:var(--primary-deep)}
.badge-new{background:var(--amber-soft);color:#C97A16}
.badge-done{background:var(--success-soft);color:var(--success)}
.badge-pro{background:linear-gradient(135deg,#5B5BD6,#8B5BD6);color:#fff}

/* ---------- chips (topic selectors) ---------- */
.chip{display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:var(--r-full);border:1.5px solid var(--line-strong);background:var(--surface);font-weight:500;font-size:14px;cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--primary)}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}
.chip-wrap{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-sm)}
.card-pad{padding:22px}
.card-hover{transition:.15s;cursor:pointer}
.card-hover:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--line-strong)}
.card-dark{background:var(--dark);color:var(--on-dark);border:none}
.card-dark .muted{color:var(--on-dark-muted)}
.card-primary{background:var(--primary);color:#fff;border:none}
.card-primary .muted{color:#D6D6F6}

/* ---------- progress ---------- */
.progress{height:10px;background:var(--line);border-radius:var(--r-full);overflow:hidden}
.progress-fill{height:100%;background:var(--primary);border-radius:var(--r-full)}
.progress-fill.amber{background:var(--amber)}
.progress-fill.green{background:var(--success)}
.progress-lg{height:14px}
.progress-sm{height:6px}

/* word strength dots (SRS) */
.dots{display:inline-flex;gap:3px}
.dots i{width:7px;height:7px;border-radius:50%;background:var(--line-strong)}
.dots i.on{background:var(--amber)}
.dots i.full{background:var(--success)}

/* ---------- layout: web app shell ---------- */
.app{display:flex;min-height:100vh}
.sidebar{width:248px;background:var(--surface);border-right:1px solid var(--line);padding:26px 16px;display:flex;flex-direction:column;gap:6px;position:sticky;top:0;height:100vh;flex-shrink:0}
.sidebar .logo{padding:0 12px;margin-bottom:22px}
.nav-item{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:var(--r-md);font-weight:500;color:var(--ink-2);font-size:14.5px;transition:.12s}
.nav-item .ico{font-size:18px;width:22px;text-align:center}
.nav-item:hover{background:var(--primary-ghost)}
.nav-item.active{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.sidebar .spacer{flex:1}
.main{flex:1;min-width:0}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 36px;border-bottom:1px solid var(--line);background:var(--surface);position:sticky;top:0;z-index:10}
.content{padding:34px 36px;max-width:1120px;margin:0 auto}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;border:1.5px solid #D8D8F4}
.avatar-lg{width:72px;height:72px;font-size:26px;border-radius:24px}

/* ---------- grid & flex utils ---------- */
.row{display:flex;align-items:center;gap:12px}
.row-between{display:flex;align-items:center;justify-content:space-between;gap:12px}
.col{display:flex;flex-direction:column;gap:12px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.gap-4{gap:4px}.gap-8{gap:8px}.gap-16{gap:16px}.gap-24{gap:24px}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}
.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}
.center{text-align:center}
.wrap{flex-wrap:wrap}

/* ---------- inputs ---------- */
.input,.textarea{width:100%;padding:13px 16px;border-radius:var(--r-md);border:1.5px solid var(--line-strong);background:var(--surface);font-family:inherit;font-size:15px;color:var(--ink);outline:none;transition:.15s}
.input:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.textarea{min-height:110px;resize:vertical}
.label{font-size:13px;font-weight:600;margin-bottom:7px;display:block;color:var(--ink-2)}
.select-card{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1.5px solid var(--line-strong);border-radius:var(--r-md);background:var(--surface);cursor:pointer;transition:.15s;font-weight:500}
.select-card:hover{border-color:var(--primary)}
.select-card.active{border-color:var(--primary);background:var(--primary-ghost);box-shadow:0 0 0 3px var(--primary-soft)}
.select-card .ico{font-size:22px}
.switch{width:42px;height:24px;border-radius:var(--r-full);background:var(--line-strong);position:relative;flex-shrink:0}
.switch.on{background:var(--primary)}
.switch::after{content:'';position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:.15s}
.switch.on::after{left:21px}

/* ---------- chat (AI dialog) ---------- */
.chat{display:flex;flex-direction:column;gap:14px}
.msg{display:flex;gap:12px;max-width:78%}
.msg-ai{align-self:flex-start}
.msg-user{align-self:flex-end;flex-direction:row-reverse}
.msg .who{width:34px;height:34px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:16px}
.msg-ai .who{background:var(--primary-soft)}
.msg-user .who{background:var(--dark);color:#fff;font-weight:700;font-size:12px}
.bubble{padding:13px 17px;border-radius:18px;font-size:14.5px;line-height:1.55}
.msg-ai .bubble{background:var(--surface);border:1px solid var(--line);border-top-left-radius:6px}
.msg-user .bubble{background:var(--primary);color:#fff;border-top-right-radius:6px}
.bubble .fix{background:var(--success-soft);color:var(--success);border-radius:6px;padding:1px 6px;font-weight:600}
.bubble .err{background:var(--error-soft);color:var(--error);border-radius:6px;padding:1px 6px;text-decoration:line-through}
.chat-input{display:flex;gap:10px;padding:12px;background:var(--surface);border:1.5px solid var(--line-strong);border-radius:18px;align-items:center}
.chat-input input{flex:1;border:none;outline:none;font-family:inherit;font-size:15px;background:transparent}
.chat-hint{display:inline-flex;gap:8px;align-items:center;background:var(--info-soft);color:#33688C;border-radius:var(--r-md);padding:10px 14px;font-size:13.5px}

/* ---------- game: word tiles ---------- */
.tile{display:inline-flex;align-items:center;justify-content:center;padding:11px 18px;border-radius:var(--r-md);background:var(--surface);border:1.5px solid var(--line-strong);box-shadow:0 2px 0 var(--line-strong);font-weight:600;font-size:15.5px;cursor:pointer;transition:.12s}
.tile:hover{border-color:var(--primary);box-shadow:0 2px 0 var(--primary)}
.tile.used{opacity:.3;box-shadow:none}
.tile.placed{background:var(--primary-soft);border-color:var(--primary);color:var(--primary-deep);box-shadow:0 2px 0 var(--primary)}
.tile.correct{background:var(--success-soft);border-color:var(--success);color:var(--success);box-shadow:0 2px 0 var(--success)}
.tile.wrong{background:var(--error-soft);border-color:var(--error);color:var(--error);box-shadow:0 2px 0 var(--error)}
.tile-row{display:flex;flex-wrap:wrap;gap:10px}
.answer-line{min-height:54px;border-bottom:2px dashed var(--line-strong);display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding-bottom:10px}

/* ---------- game: match pairs ---------- */
.match-item{padding:15px 18px;border-radius:var(--r-md);border:1.5px solid var(--line-strong);background:var(--surface);font-weight:600;font-size:15px;cursor:pointer;text-align:center;box-shadow:0 2px 0 var(--line-strong);transition:.12s}
.match-item.selected{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-deep);box-shadow:0 2px 0 var(--primary)}
.match-item.matched{border-color:var(--success);background:var(--success-soft);color:var(--success);opacity:.55;box-shadow:none}

/* ---------- game: crossword ---------- */
.cw-grid{display:grid;gap:3px}
.cw-cell{width:38px;height:38px;background:var(--surface);border:1.5px solid var(--line-strong);border-radius:7px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;font-family:var(--font-display);position:relative;text-transform:uppercase}
.cw-cell.empty{background:transparent;border:none}
.cw-cell.filled{background:var(--primary-soft);border-color:#C9C9F0;color:var(--primary-deep)}
.cw-cell.ok{background:var(--success-soft);border-color:var(--success);color:var(--success)}
.cw-cell .num{position:absolute;top:2px;left:4px;font-size:8.5px;color:var(--muted);font-family:var(--font-ui)}

/* ---------- flashcard ---------- */
.flashcard{background:var(--surface);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow-md);padding:48px 34px;text-align:center}
.flashcard .word{font-family:var(--font-display);font-weight:800;font-size:36px;letter-spacing:-.01em}
.flashcard .artikel{color:var(--primary);font-weight:700}

/* ---------- quiz options ---------- */
.quiz-opt{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1.5px solid var(--line-strong);border-radius:var(--r-md);background:var(--surface);cursor:pointer;font-weight:500;font-size:15px;box-shadow:0 2px 0 var(--line-strong);transition:.12s}
.quiz-opt:hover{border-color:var(--primary)}
.quiz-opt .key{width:26px;height:26px;border-radius:8px;border:1.5px solid var(--line-strong);display:inline-flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:700;color:var(--muted);flex-shrink:0}
.quiz-opt.correct{border-color:var(--success);background:var(--success-soft);box-shadow:0 2px 0 var(--success)}
.quiz-opt.correct .key{border-color:var(--success);background:var(--success);color:#fff}
.quiz-opt.wrong{border-color:var(--error);background:var(--error-soft);box-shadow:0 2px 0 var(--error)}

/* ---------- gamification widgets ---------- */
.streak-cal{display:flex;gap:8px}
.streak-day{width:38px;text-align:center}
.streak-day .d{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 5px;background:var(--line);font-size:15px}
.streak-day.on .d{background:var(--amber-soft);border:1.5px solid var(--amber)}
.streak-day.today .d{background:var(--amber);color:#fff;box-shadow:0 0 0 3px var(--amber-soft)}
.streak-day span{font-size:11px;color:var(--muted);font-weight:600}

.quest{display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:var(--r-md);border:1px solid var(--line);background:var(--surface)}
.quest .qico{width:42px;height:42px;border-radius:12px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.quest.done .qico{background:var(--success-soft)}

.lb-row{display:flex;align-items:center;gap:14px;padding:13px 16px;border-radius:var(--r-md)}
.lb-row.me{background:var(--primary-soft);border:1.5px solid #C9C9F0}
.lb-row .rank{width:28px;font-family:var(--font-display);font-weight:700;color:var(--muted);text-align:center}
.lb-row .up{color:var(--success);font-size:12px;font-weight:700}
.lb-row .down{color:var(--error);font-size:12px;font-weight:700}

.ach{text-align:center;padding:22px 14px}
.ach .medal{width:64px;height:64px;border-radius:50%;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:28px;background:var(--amber-soft);border:2px solid var(--amber)}
.ach.locked .medal{background:var(--line);border-color:var(--line-strong);filter:grayscale(1);opacity:.55}

.heat{display:grid;grid-template-columns:repeat(26,1fr);gap:4px}
.heat i{aspect-ratio:1;border-radius:4px;background:var(--line)}
.heat i.l1{background:#D8D8F4}.heat i.l2{background:#A9A9E8}.heat i.l3{background:#7B7BDD}.heat i.l4{background:var(--primary-deep)}

/* learning path */
.path-node{display:flex;align-items:center;gap:16px;padding:14px 0}
.path-node .pn{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0;background:var(--surface);border:2.5px solid var(--line-strong);box-shadow:0 3px 0 var(--line-strong)}
.path-node.done .pn{background:var(--success-soft);border-color:var(--success);box-shadow:0 3px 0 var(--success)}
.path-node.current .pn{background:var(--primary);border-color:var(--primary-deep);box-shadow:0 3px 0 var(--primary-deep);color:#fff}
.path-node.locked{opacity:.45}
.path-connector{width:3px;height:26px;background:var(--line-strong);margin-left:27px;border-radius:2px}
.path-connector.done{background:var(--success)}

/* ---------- table ---------- */
.table{width:100%;border-collapse:collapse;font-size:14px}
.table th{text-align:left;padding:11px 14px;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);border-bottom:1px solid var(--line)}
.table td{padding:13px 14px;border-bottom:1px solid var(--line)}
.table tr:last-child td{border-bottom:none}

/* ---------- toast ---------- */
.toast{display:inline-flex;align-items:center;gap:10px;background:var(--dark);color:var(--on-dark);padding:13px 18px;border-radius:var(--r-md);box-shadow:var(--shadow-lg);font-weight:500;font-size:14px}

/* ============================================================
   MOBILE (phone frame)
   ============================================================ */
.stage{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px;background:#ECECE6}
.phone{width:393px;height:852px;background:var(--bg);border-radius:54px;border:10px solid #14141A;box-shadow:0 30px 80px rgba(20,20,26,.35);overflow:hidden;position:relative;display:flex;flex-direction:column}
.statusbar{height:52px;display:flex;align-items:center;justify-content:space-between;padding:14px 28px 0;font-size:14px;font-weight:600;flex-shrink:0}
.statusbar .notch{position:absolute;top:12px;left:50%;transform:translateX(-50%);width:118px;height:32px;background:#14141A;border-radius:20px}
.phone-screen{flex:1;overflow-y:auto;padding:14px 20px 20px;display:flex;flex-direction:column;gap:16px}
.phone-screen::-webkit-scrollbar{display:none}
.tabbar{flex-shrink:0;display:flex;justify-content:space-around;padding:10px 8px 26px;background:var(--surface);border-top:1px solid var(--line)}
.tab-item{display:flex;flex-direction:column;align-items:center;gap:3px;font-size:10.5px;font-weight:600;color:var(--muted);width:60px}
.tab-item .ico{font-size:21px}
.tab-item.active{color:var(--primary-deep)}
.mobile-header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:4px 0}
.mobile-header .back{width:38px;height:38px;border-radius:12px;background:var(--surface);border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:16px}
.phone .h1{font-size:27px}
.phone .display{font-size:34px}
.phone .content-pad{padding:0}

/* dark phone variant */
.phone.dark{background:var(--dark)}
.phone.dark .statusbar{color:var(--on-dark)}

/* ---------- misc ---------- */
.divider{height:1px;background:var(--line);border:none}
.kbd{display:inline-block;padding:2px 8px;border-radius:6px;border:1px solid var(--line-strong);background:var(--surface);font-size:12px;font-weight:600;box-shadow:0 1.5px 0 var(--line-strong)}
.xp-pop{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-display);font-weight:800;color:var(--amber);font-size:20px}
.ring{position:relative;width:120px;height:120px;border-radius:50%;background:conic-gradient(var(--primary) var(--p,70%),var(--line) 0);display:flex;align-items:center;justify-content:center}
.ring::before{content:'';position:absolute;inset:10px;border-radius:50%;background:var(--surface)}
.ring span{position:relative;font-family:var(--font-display);font-weight:800;font-size:24px}