/* ───────────────────────────────────────
   DESIGN TOKENS
   ─────────────────────────────────────── */
:root {
  --violet-700: #5B21B6; --violet-600: #6D28D9; --violet-500: #7C3AED;
  --violet-400: #8B5CF6; --violet-300: #A78BFA; --violet-200: #C4B5FD;
  --sky-500: #0EA5E9; --sky-400: #38BDF8; --sky-300: #7DD3FC;
  --em-400: #059669; --am-400: #D97706; --rose-400: #E11D48;
  --bg: #FFFFFF; --surface: #F5F3FF; --surface2: #EDE9FE; --surface3: #DDD6FE;
  --card: #EDE9FE; --card2: #DDD6FE;
  --accent: var(--violet-500); --accent2: var(--violet-400); --accent3: var(--violet-300);
  --teal: var(--sky-500); --teal2: var(--sky-400);
  --green: var(--em-400); --yellow: var(--am-400); --red: var(--rose-400);
  --t1: #1E1B4B; --t2: #4C1D95; --t3: #7C3AED; --t4: #A78BFA;
  --b1: rgba(109,40,217,.06); --b2: rgba(109,40,217,.12);
  --b3: rgba(109,40,217,.20); --b4: rgba(109,40,217,.32);
  --grad-v:   linear-gradient(135deg, #5B21B6 0%, #7C3AED 100%);
  --grad-vt:  linear-gradient(135deg, #6D28D9 0%, #0EA5E9 100%);
  --grad-msg: linear-gradient(135deg, #6D28D9 0%, #5B21B6 100%);
  --sh1: 0 1px 4px rgba(109,40,217,.12); --sh2: 0 4px 16px rgba(109,40,217,.18);
  --sh3: 0 12px 40px rgba(109,40,217,.22); --sh4: 0 24px 64px rgba(109,40,217,.28);
  --sh-v: 0 4px 20px rgba(109,40,217,.38); --sh-vl: 0 8px 32px rgba(109,40,217,.48);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --ease: cubic-bezier(.4,0,.2,1); --spring: cubic-bezier(.34,1.56,.64,1);
  --hh: 64px; --sw: 258px; --nh: 68px;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; font-size: 15px; -webkit-text-size-adjust: 100%; }
body { height: 100%; background: #fff; color: var(--t1); font-family: var(--font); overflow: hidden; -webkit-font-smoothing: antialiased; }
button { cursor: pointer; border: none; outline: none; background: none; font-family: var(--font); color: inherit; }
input, textarea { font-family: var(--font); outline: none; border: none; background: none; color: var(--t1); }
svg { flex-shrink: 0; }

/* ── AMBIENT BG ── */
.amb-bg { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.amb-orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; }
.amb-orb-1 { width: 600px; height: 600px; top: -200px; left: -100px; background: radial-gradient(circle, rgba(167,139,250,.22) 0%, transparent 70%); }
.amb-orb-2 { width: 500px; height: 500px; bottom: -150px; right: -80px; background: radial-gradient(circle, rgba(14,165,233,.12) 0%, transparent 70%); }
.amb-orb-3 { width: 300px; height: 300px; top: 40%; left: 55%; background: radial-gradient(circle, rgba(139,92,246,.10) 0%, transparent 70%); }

/* ── SCREEN ── */
.screen { position: fixed; inset: 0; z-index: 1; transition: opacity .45s var(--ease), transform .45s var(--ease); }
.screen:not(.active) { opacity: 0; pointer-events: none; transform: translateY(12px) scale(.97); }

/* ════════════════════════════════════════
   LOGIN PAGE
   ════════════════════════════════════════ */
.login-page { overflow: auto; }
.login-wrap { position: relative; z-index: 2; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px; }
.login-card {
  width: 100%; max-width: 420px;
  background: rgba(255,255,255,.97); backdrop-filter: blur(32px) saturate(150%);
  border: 1px solid var(--b3); border-radius: 24px;
  padding: 36px 32px 28px; box-shadow: var(--sh3), 0 0 0 1px rgba(109,40,217,.08);
}
.login-hero { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; }
.login-logo { flex-shrink: 0; animation: obFloat 3s ease-in-out infinite; filter: drop-shadow(0 0 20px rgba(109,40,217,.55)); }
@keyframes obFloat { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-7px)} }
.login-brand { font-size: 2.2rem; font-weight: 900; letter-spacing: -1.5px; line-height: 1; margin-bottom: 4px; color: var(--t1); }
.login-brand span { background: var(--grad-vt); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.login-sub { font-size: .78rem; color: var(--t3); font-weight: 500; }
.login-note { text-align: center; font-size: .73rem; color: var(--t4); margin-top: 16px; }

/* Auth tabs */
.auth-tabs { display: flex; background: var(--surface3); border-radius: 12px; padding: 4px; margin-bottom: 20px; }
.auth-tab { flex: 1; padding: 9px; border-radius: 9px; font-size: .83rem; font-weight: 700; color: var(--t3); transition: all .18s; }
.auth-tab.active { background: #fff; color: var(--violet-600); box-shadow: var(--sh1); }

/* Fields */
.field-wrap { position: relative; display: flex; align-items: center; margin-bottom: 10px; }
.field-icon { position: absolute; left: 14px; font-size: 1rem; pointer-events: none; z-index: 1; }
.field-wrap input {
  width: 100%; background: var(--surface3); border: 1.5px solid var(--b3);
  border-radius: 13px; padding: 13px 42px 13px 42px;
  font-size: .95rem; color: var(--t1); transition: border-color .2s, box-shadow .2s;
}
.field-wrap input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,58,237,.15); }
.field-wrap input::placeholder { color: var(--t4); }
.show-pass { position: absolute; right: 14px; font-size: .95rem; color: var(--t3); z-index: 1; transition: color .15s; }
.show-pass:hover { color: var(--t1); }

.auth-form.hidden { display: none; }
.auth-error { background: rgba(225,29,72,.08); border: 1px solid rgba(225,29,72,.2); color: var(--rose-400); border-radius: 10px; padding: 9px 13px; font-size: .82rem; font-weight: 600; margin-bottom: 8px; }
.auth-error.hidden { display: none; }

.btn-auth {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--grad-v); color: #fff; font-size: .95rem; font-weight: 700;
  padding: 14px; border-radius: 13px; box-shadow: var(--sh-v); margin-top: 4px;
  transition: opacity .2s, transform .15s, box-shadow .2s;
}
.btn-auth:not(:disabled):hover { opacity: .92; transform: translateY(-2px); box-shadow: var(--sh-vl); }
.btn-auth:disabled { opacity: .45; cursor: not-allowed; }

/* ════════════════════════════════════════
   APP HEADER
   ════════════════════════════════════════ */
.app-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50; height: var(--hh);
  background: rgba(255,255,255,.92); backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-bottom: 1px solid var(--b2); display: flex; align-items: center; gap: 10px; padding: 0 16px;
}
.app-header::after {
  content: ''; position: absolute; inset-x: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(109,40,217,.55) 30%, rgba(14,165,233,.45) 70%, transparent 100%);
}
.hd-left { display: flex; align-items: center; gap: 10px; }
.icon-btn { width: 36px; height: 36px; border-radius: 9px; display: flex; align-items: center; justify-content: center; color: var(--t2); transition: background .15s, color .15s; }
.icon-btn:hover { background: var(--surface3); color: var(--t1); }
.hd-brand { display: flex; align-items: center; gap: 8px; }
.hd-brand-mark { width: 28px; height: 28px; border-radius: 8px; background: var(--grad-vt); display: flex; align-items: center; justify-content: center; font-size: .85rem; font-weight: 900; color: #fff; box-shadow: 0 2px 8px rgba(109,40,217,.4); }
.hd-brand span { font-size: 1.1rem; font-weight: 900; letter-spacing: -.5px; }
.hd-brand em { font-style: normal; background: var(--grad-vt); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hd-stats { display: flex; align-items: center; gap: 5px; flex: 1; justify-content: center; }
.stat-chip { display: flex; align-items: center; gap: 4px; background: var(--surface3); border: 1px solid var(--b2); border-radius: 20px; padding: 4px 11px; font-size: .78rem; white-space: nowrap; }
.stat-chip strong { font-weight: 700; color: var(--t1); }
.stat-chip small { color: var(--t2); font-size: .7rem; }
.stat-chip.fire strong { color: #FB923C; }
.stat-chip.xp-chip { background: linear-gradient(135deg, rgba(109,40,217,.15), rgba(14,165,233,.1)); border-color: rgba(124,58,237,.3); }
.stat-chip.xp-chip strong { background: var(--grad-vt); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.level-pill { background: var(--grad-v); color: #fff; font-size: .72rem; font-weight: 800; letter-spacing: .07em; padding: 5px 12px; border-radius: 20px; box-shadow: 0 2px 10px rgba(109,40,217,.38); cursor: pointer; }
.level-pill:hover { opacity: .85; transform: scale(1.05); transition: all .15s; }

/* ── APP BODY ── */
#app { display: flex; flex-direction: column; }
.app-body { position: fixed; top: var(--hh); left: 0; right: 0; bottom: 0; display: flex; overflow: hidden; }

/* ── SIDEBAR ── */
.sidebar { width: var(--sw); height: 100%; background: rgba(245,243,255,.97); backdrop-filter: blur(20px); border-right: 1px solid var(--b2); display: flex; flex-direction: column; flex-shrink: 0; overflow: hidden; transition: transform .3s var(--ease); }
.sb-inner { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 18px 12px 24px; display: flex; flex-direction: column; gap: 24px; scrollbar-width: thin; scrollbar-color: var(--surface3) transparent; }
.sb-section {}
.sb-label { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--t4); margin-bottom: 10px; padding: 0 6px; display: flex; align-items: center; gap: 6px; }
.topic-nav { display: flex; flex-direction: column; gap: 2px; }
.topic-btn { display: flex; align-items: center; gap: 9px; width: 100%; padding: 11px 10px; border-radius: 12px; font-size: .9rem; color: var(--t1); font-weight: 600; text-align: left; position: relative; transition: background .14s, color .14s; background: rgba(255,255,255,0.7); border: 1px solid var(--b2); margin-bottom: 4px; }
.topic-btn .tb-icon { font-size: 1.2rem; width: 26px; text-align: center; flex-shrink: 0; }
.topic-btn:hover, .topic-btn:active { background: rgba(124,58,237,.1); border-color: rgba(124,58,237,.3); }
.topic-btn.active { background: rgba(124,58,237,.12); color: var(--violet-300); }
.topic-btn.active::before { content: ''; position: absolute; left: 0; top: 20%; bottom: 20%; width: 2.5px; border-radius: 2px; background: var(--grad-v); }
.tb-info { display: flex; flex-direction: column; flex: 1; min-width: 0; gap: 1px; }
.tb-text { font-size: .85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tb-sub { font-size: .67rem; color: var(--t4); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topic-btn.active .tb-sub { color: rgba(167,139,250,.75); }
.sb-vocab .vocab-badge { background: var(--accent); color: #fff; font-size: .62rem; font-weight: 800; padding: 2px 7px; border-radius: 20px; }
.vocab-scroll { display: flex; flex-direction: column; gap: 6px; max-height: 260px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--surface3) transparent; }
.vocab-empty { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 20px 12px; color: var(--t4); text-align: center; }
.vocab-empty svg { opacity: .5; }
.vocab-empty p { font-size: .78rem; line-height: 1.5; }
.vocab-item { background: var(--surface3); border: 1px solid var(--b2); border-radius: 9px; padding: 9px 11px; transition: border-color .15s, background .15s; }
.vocab-item:hover { background: var(--card); border-color: var(--b3); }
.vocab-item .vi-word { font-size: .88rem; font-weight: 700; background: var(--grad-vt); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 2px; }
.vocab-item .vi-es { font-size: .75rem; color: var(--t2); }

/* ── CHAT ── */
.chat-main { flex: 1; display: flex; flex-direction: column; overflow: hidden; min-width: 0; }
.messages-area { flex: 1; overflow-y: auto; padding: 28px 20px; display: flex; flex-direction: column; gap: 22px; scroll-behavior: smooth; scrollbar-width: thin; scrollbar-color: var(--surface3) transparent; }

/* ── MESSAGES ── */
.msg { display: flex; align-items: flex-end; gap: 10px; animation: msgIn .3s var(--ease) both; }
@keyframes msgIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
.msg.user { flex-direction: row-reverse; }
.msg-avatar { width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: .88rem; font-weight: 800; background: var(--grad-vt); color: #fff; box-shadow: 0 2px 10px rgba(109,40,217,.35); letter-spacing: -.5px; user-select: none; }
.msg.user .msg-avatar { background: var(--surface3); border: 1px solid var(--b3); box-shadow: none; font-size: .75rem; }
.msg-bubble { max-width: 68%; display: flex; flex-direction: column; }
.msg.user .msg-bubble { max-width: 76%; align-items: flex-end; }
.bubble { font-size: .925rem; line-height: 1.65; word-break: break-word; padding: 13px 17px; position: relative; }
.msg.alex .bubble { background: var(--surface); border: 1px solid var(--b3); border-radius: 18px 18px 18px 5px; box-shadow: var(--sh1); color: var(--t1); }
.msg.alex .bubble::after { content: ''; position: absolute; left: -1px; top: 14px; bottom: 14px; width: 2.5px; border-radius: 2px; background: var(--grad-vt); opacity: .7; }
.msg.alex.e-excited .bubble { border-color: rgba(251,191,36,.2); }
.msg.alex.e-proud .bubble { border-color: rgba(52,211,153,.2); }
.msg.user .bubble { background: var(--grad-msg); border-radius: 18px 18px 5px 18px; color: #fff; box-shadow: var(--sh-v); font-weight: 500; }
.bubble-actions { display: flex; gap: 5px; margin-top: 8px; flex-wrap: wrap; }
.ba-btn { display: inline-flex; align-items: center; gap: 4px; font-size: .7rem; font-weight: 600; letter-spacing: .01em; padding: 4px 10px; border-radius: 20px; transition: all .14s; }
.ba-btn.correction { background: rgba(251,113,133,.1); color: var(--rose-400); border: 1px solid rgba(251,113,133,.22); }
.ba-btn.vocab       { background: rgba(139,92,246,.12); color: var(--violet-300); border: 1px solid rgba(139,92,246,.24); }
.ba-btn.speak       { background: rgba(56,189,248,.1); color: var(--sky-300); border: 1px solid rgba(56,189,248,.2); }
.ba-btn:hover { opacity: .8; }
.msg-time { font-size: .64rem; color: var(--t4); margin-top: 4px; padding: 0 2px; }
.typing-msg .bubble { padding: 15px 19px; }
.typing-dots { display: flex; gap: 5px; align-items: center; height: 14px; }
.typing-dots span { width: 7px; height: 7px; border-radius: 50%; background: linear-gradient(135deg, var(--violet-400), var(--sky-400)); animation: tdot 1.3s ease-in-out infinite; }
.typing-dots span:nth-child(2) { animation-delay: .18s; }
.typing-dots span:nth-child(3) { animation-delay: .36s; }
@keyframes tdot { 0%,70%,100%{transform:scale(.65);opacity:.35} 35%{transform:scale(1.1);opacity:1} }

/* ── PANELS ── */
.panel { margin: 0 14px 8px; border-radius: 14px; overflow: hidden; background: rgba(237,233,254,.98); backdrop-filter: blur(28px); border: 1px solid var(--b3); box-shadow: 0 -4px 24px rgba(0,0,0,.5); animation: panelUp .22s var(--ease) both; }
@keyframes panelUp { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }
.panel.hidden { display: none; }
.panel-bar { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: rgba(255,255,255,.025); border-bottom: 1px solid var(--b2); font-size: .82rem; font-weight: 700; }
.panel-bar-left { display: flex; align-items: center; gap: 8px; }
.panel-icon { width: 26px; height: 26px; border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: .82rem; }
.corr-icon { background: rgba(251,113,133,.12); border: 1px solid rgba(251,113,133,.2); }
.vocab-icon { background: rgba(139,92,246,.12); border: 1px solid rgba(139,92,246,.2); }
.anal-icon  { background: rgba(56,189,248,.1);  border: 1px solid rgba(56,189,248,.18); }
.trans-icon { background: rgba(52,211,153,.1);  border: 1px solid rgba(52,211,153,.18); }
.panel-x { width: 26px; height: 26px; border-radius: 7px; display: flex; align-items: center; justify-content: center; color: var(--t3); transition: background .14s; }
.panel-x:hover { background: var(--b3); }
.panel-content { padding: 14px 16px; font-size: .875rem; }
.corr-row { display: flex; flex-direction: column; gap: 10px; }
.corr-line { display: flex; align-items: baseline; gap: 10px; line-height: 1.55; }
.corr-line.bad { color: var(--rose-400); } .corr-line.good { color: var(--em-400); }
.cl-mark { font-size: 1rem; flex-shrink: 0; } .cl-text { font-weight: 600; font-size: .92rem; }
.corr-tip { padding: 9px 13px; border-radius: 8px; font-size: .82rem; line-height: 1.55; background: rgba(139,92,246,.08); border-left: 3px solid var(--violet-400); color: var(--t2); }
.vc-card { display: flex; flex-direction: column; gap: 8px; }
.vc-word { font-size: 1.6rem; font-weight: 900; letter-spacing: -.8px; background: var(--grad-vt); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.1; }
.vc-tag { display: inline-flex; align-items: center; gap: 5px; background: rgba(56,189,248,.1); color: var(--sky-300); border: 1px solid rgba(56,189,248,.2); border-radius: 8px; padding: 3px 10px; font-size: .78rem; font-weight: 600; width: fit-content; }
.vc-def { color: var(--t1); font-size: .9rem; line-height: 1.55; } .vc-ex { color: var(--t2); font-size: .83rem; font-style: italic; }
.vc-save { align-self: flex-start; margin-top: 2px; background: rgba(124,58,237,.14); color: var(--violet-300); border: 1px solid rgba(139,92,246,.28); border-radius: 9px; padding: 7px 16px; font-size: .82rem; font-weight: 700; transition: all .15s; }
.vc-save:hover:not(.saved) { background: rgba(124,58,237,.24); transform: translateY(-1px); }
.vc-save.saved { background: rgba(16,185,129,.1); color: var(--em-400); border-color: rgba(52,211,153,.25); cursor: default; }
.an-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.an-score-ring { width: 56px; height: 56px; border-radius: 50%; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 1.05rem; font-weight: 900; }
.an-score-ring.high { background: rgba(16,185,129,.12); color: var(--em-400); border: 2px solid rgba(52,211,153,.3); }
.an-score-ring.mid  { background: rgba(245,158,11,.12);  color: var(--am-400); border: 2px solid rgba(251,191,36,.3); }
.an-score-ring.low  { background: rgba(251,113,133,.12); color: var(--rose-400); border: 2px solid rgba(251,113,133,.3); }
.an-label { font-size: .82rem; color: var(--t2); line-height: 1.6; }
.an-corrs { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.an-item { background: var(--surface3); border: 1px solid var(--b2); border-radius: 9px; padding: 10px 12px; }
.an-bad { font-size: .79rem; color: var(--rose-400); font-weight: 600; margin-bottom: 3px; }
.an-good { font-size: .79rem; color: var(--em-400); font-weight: 600; margin-bottom: 5px; }
.an-why { font-size: .77rem; color: var(--t2); line-height: 1.5; }
.an-positive { padding: 9px 13px; border-radius: 8px; border-left: 3px solid var(--em-400); background: rgba(16,185,129,.07); color: var(--t2); font-size: .82rem; line-height: 1.5; }
.tr-orig { font-size: .82rem; color: var(--t3); font-style: italic; line-height: 1.55; }
.tr-hr { height: 1px; background: var(--b2); margin: 8px 0; }
.tr-result { font-size: .95rem; color: var(--t1); line-height: 1.6; font-weight: 500; }

/* ── TOOLBAR ── */
.toolbar { display: flex; gap: 6px; padding: 8px 14px 0; flex-wrap: wrap; }
.t-btn { display: inline-flex; align-items: center; gap: 5px; font-size: .76rem; font-weight: 700; letter-spacing: .01em; padding: 7px 14px; border-radius: 20px; background: var(--surface2); border: 1.5px solid var(--b3); color: var(--violet-600); transition: all .14s; }
.t-btn:hover { background: var(--surface3); border-color: var(--b4); }
.t-btn-voice.active { background: rgba(225,29,72,.08); color: #E11D48; border-color: rgba(225,29,72,.25); }

/* ── INPUT ROW ── */
.input-row { display: flex; align-items: flex-end; gap: 9px; padding: 10px 14px 14px; border-top: 1px solid var(--b2); background: rgba(255,255,255,.95); backdrop-filter: blur(16px); }
.mic-btn { width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0; background: var(--surface3); border: 1.5px solid var(--b3); display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--t2); transition: all .2s; position: relative; }
.mic-btn:hover { background: var(--card); }
.mic-btn.listening { background: rgba(251,113,133,.12); border-color: rgba(251,113,133,.5); color: var(--rose-400); animation: micRing 1.1s ease-out infinite; }
@keyframes micRing { 0%{box-shadow:0 0 0 0 rgba(251,113,133,.5)} 70%{box-shadow:0 0 0 9px rgba(251,113,133,0)} 100%{box-shadow:0 0 0 0 rgba(251,113,133,0)} }
.textarea-wrap { flex: 1; position: relative; }
#msg-input { width: 100%; display: block; background: var(--surface3); border: 1.5px solid var(--b3); border-radius: 15px; padding: 11px 16px; font-size: .925rem; color: var(--t1); resize: none; max-height: 130px; overflow-y: auto; line-height: 1.55; transition: border-color .2s, box-shadow .2s; scrollbar-width: none; }
#msg-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,58,237,.12); }
#msg-input::placeholder { color: var(--t4); }
.send-btn { width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0; background: var(--grad-v); display: flex; align-items: center; justify-content: center; color: #fff; box-shadow: var(--sh-v); transition: opacity .18s, transform .15s, box-shadow .2s; }
.send-btn:not(:disabled):hover { opacity: .9; transform: scale(1.07); }
.send-btn:disabled { opacity: .28; cursor: not-allowed; box-shadow: none; }

/* ── MOBILE NAV ── */
.mnav-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; height: var(--nh); z-index: 40; background: rgba(255,255,255,.97); backdrop-filter: blur(24px); border-top: 1px solid var(--b2); }
.mnav-btn { flex: 1; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; color: var(--t3); transition: color .18s; position: relative; }
.mnav-btn small { font-size: .65rem; font-weight: 700; }
.mnav-btn.active { color: var(--violet-600); }
.mnav-btn.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 28px; height: 2.5px; background: var(--grad-v); border-radius: 2px 2px 0 0; }

/* ── OVERLAY ── */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 30; opacity: 0; pointer-events: none; transition: opacity .3s; backdrop-filter: blur(4px); }
.overlay.active { opacity: 1; pointer-events: all; }

/* ── TOAST ── */
.toast { position: fixed; bottom: 86px; left: 50%; transform: translateX(-50%) translateY(12px); background: rgba(19,22,41,.97); backdrop-filter: blur(20px); border: 1px solid var(--b3); color: var(--t1); padding: 10px 20px; border-radius: 24px; font-size: .83rem; font-weight: 600; z-index: 200; opacity: 0; white-space: nowrap; transition: opacity .25s var(--ease), transform .25s var(--ease); box-shadow: var(--sh2); }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border-color: rgba(52,211,153,.35); color: var(--em-400); }
.toast.error   { border-color: rgba(251,113,133,.35); color: var(--rose-400); }

/* ── LEADERBOARD ── */
.leaderboard-list { display: flex; flex-direction: column; gap: 4px; }
.lb-empty { font-size: .78rem; color: var(--t4); text-align: center; padding: 12px 0; }
.lb-row { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 9px; background: var(--surface3); border: 1px solid var(--b1); transition: border-color .15s; }
.lb-row:hover { border-color: var(--b3); }
.lb-row.lb-me { background: rgba(109,40,217,.12); border-color: rgba(109,40,217,.25); }
.lb-pos { font-size: 1rem; width: 22px; text-align: center; flex-shrink: 0; }
.lb-name { flex: 1; font-size: .82rem; font-weight: 600; color: var(--t1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-row.lb-me .lb-name { color: var(--violet-300); }
.lb-stats { display: flex; align-items: center; gap: 5px; flex-shrink: 0; }
.lb-xp { font-size: .72rem; font-weight: 700; color: var(--t2); }
.lb-streak { font-size: .72rem; color: #fb923c; }

/* ── SCROLLBARS ── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface3); border-radius: 2px; }

/* ── SIDEBAR CLOSE BTN ── */
.sb-close { display: none; }

/* ── HAMBURGER MENU ── */
.hd-menu { position: fixed; top: var(--hh); left: 0; z-index: 60; width: 280px; background: #fff; border: 1px solid var(--b2); border-radius: 0 0 18px 0; box-shadow: var(--sh3); padding: 16px 0 12px; animation: menuDrop .2s var(--ease) both; max-height: calc(100vh - var(--hh) - 12px); overflow-y: auto; }
@keyframes menuDrop { from{opacity:0;transform:translateY(-8px)} to{opacity:1;transform:translateY(0)} }
.hd-menu.hidden { display: none; }
.hdm-user { display: flex; align-items: center; gap: 12px; padding: 0 16px 14px; }
.hdm-avatar { width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0; background: var(--grad-v); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 800; }
.hdm-info { display: flex; flex-direction: column; gap: 2px; }
.hdm-name { font-size: .95rem; font-weight: 700; color: var(--t1); }
.hdm-sub { font-size: .72rem; color: var(--t3); }
.hdm-div { height: 1px; background: var(--b2); margin: 6px 0; }
.hdm-label { font-size: .68rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--t4); padding: 4px 16px 2px; }
.hdm-btn { display: flex; align-items: center; gap: 9px; width: 100%; padding: 10px 16px; font-size: .875rem; font-weight: 500; color: var(--t1); text-align: left; transition: background .12s; }
.hdm-btn:hover { background: var(--surface); }
.hdm-speed { font-size: .8rem; color: var(--t2); padding: 7px 16px; }
.hdm-speed.active { color: var(--violet-600); font-weight: 700; }
.hdm-logout { color: var(--rose-400) !important; font-weight: 700 !important; }
.hdm-logout:hover { background: rgba(225,29,72,.06) !important; }
.hdm-btn.hdm-install-always { background: linear-gradient(135deg, rgba(109,40,217,.12), rgba(14,165,233,.09)); color: var(--violet-600); font-weight: 700; border: 1px solid rgba(109,40,217,.2); }

/* ── LEVEL DROPDOWN ── */
.level-dd { position: fixed; top: var(--hh); right: 12px; z-index: 60; width: 220px; background: #fff; border: 1px solid var(--b2); border-radius: 14px; box-shadow: var(--sh3); padding: 10px 0 6px; animation: menuDrop .2s var(--ease) both; }
.level-dd.hidden { display: none; }
.ldd-title { font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--t4); padding: 2px 14px 8px; }
.ldd-opt { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 9px 14px; transition: background .12s; }
.ldd-opt:hover { background: var(--surface); }
.ldd-opt.active { background: var(--surface2); }
.ldd-opt strong { font-size: .95rem; font-weight: 800; color: var(--violet-600); }
.ldd-opt span { font-size: .78rem; color: var(--t2); }

/* ── PLAN CARD ── */
.plan-card { background: var(--grad-v); border-radius: 14px; padding: 14px 16px; color: #fff; flex-shrink: 0; }
.plan-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.plan-label { font-size: .7rem; font-weight: 700; letter-spacing: .04em; opacity: .85; }
.plan-week { font-size: .7rem; font-weight: 800; background: rgba(255,255,255,.22); padding: 2px 9px; border-radius: 20px; }
.plan-bar-track { background: rgba(255,255,255,.25); border-radius: 99px; height: 6px; margin-bottom: 10px; }
.plan-bar-fill { background: #fff; border-radius: 99px; height: 6px; min-width: 6px; transition: width .5s var(--ease); }
.plan-card-bot { font-size: .7rem; opacity: .82; }
.plan-card-bot strong { font-weight: 800; opacity: 1; }
.curr-group { margin-bottom: 10px; }
.curr-group-hd { display: flex; align-items: center; gap: 7px; font-size: .67rem; font-weight: 700; color: var(--t3); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 5px; padding: 0 4px; }
.curr-badge { display: inline-flex; align-items: center; justify-content: center; font-size: .6rem; font-weight: 900; padding: 2px 7px; border-radius: 6px; letter-spacing: .04em; flex-shrink: 0; }
.lvl-a1     { background: #DCFCE7; color: #15803D; }
.lvl-a2     { background: #FEF3C7; color: #B45309; }
.lvl-b1     { background: #EDE9FE; color: #6D28D9; }
.lvl-b1plus { background: #E0E7FF; color: #3730A3; }
.lvl-b2     { background: #FEE2E2; color: #B91C1C; }
.lvl-c1     { background: #1E1B4B; color: #A78BFA; }

/* ── iOS TIP ── */
.ios-tip { position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 9000; background: var(--grad-v); color: #fff; border-radius: 14px; padding: 12px 14px; display: flex; align-items: center; gap: 10px; box-shadow: var(--sh-vl); animation: ibSlideUp .35s var(--spring) both; }
@keyframes ibSlideUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
.ios-tip.hidden { display: none; }
.iot-text { flex: 1; font-size: .8rem; line-height: 1.4; }
.iot-text strong { font-weight: 800; }
.iot-close { background: rgba(255,255,255,.25); color: #fff; font-weight: 700; font-size: .75rem; padding: 7px 12px; border-radius: 10px; flex-shrink: 0; }

/* ════════════════════════════════════════
   ADMIN PAGE
   ════════════════════════════════════════ */
.admin-page { overflow: auto; background: var(--surface); }
.adm-wrap { min-height: 100vh; position: relative; z-index: 2; padding: 24px 16px; display: flex; justify-content: center; }
.adm-login-card { width: 100%; max-width: 380px; background: #fff; border: 1px solid var(--b3); border-radius: 20px; padding: 28px 24px; box-shadow: var(--sh2); align-self: flex-start; margin-top: 40px; }
.adm-login-hero { display: flex; align-items: center; gap: 12px; }
.adm-header { width: 100%; background: var(--grad-v); border-radius: 16px; padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.adm-body { width: 100%; max-width: 800px; display: flex; flex-direction: column; gap: 16px; align-self: flex-start; }
.adm-panel { width: 100%; display: flex; flex-direction: column; gap: 16px; }
.adm-section { background: #fff; border: 1px solid var(--b2); border-radius: 14px; padding: 18px 20px; }
.adm-section-title { font-size: .82rem; font-weight: 800; color: var(--t1); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 14px; }
.adm-input { background: var(--surface3); border: 1.5px solid var(--b3); border-radius: 10px; padding: 10px 14px; font-size: .88rem; color: var(--t1); min-width: 140px; transition: border-color .2s; }
.adm-input:focus { border-color: var(--accent); outline: none; }
.adm-btn { background: var(--surface2); border: 1px solid var(--b3); border-radius: 9px; padding: 9px 16px; font-size: .82rem; font-weight: 700; color: var(--t2); transition: all .14s; white-space: nowrap; }
.adm-btn:hover { background: var(--surface3); }
.adm-btn-create { background: var(--grad-v); color: #fff; border: none; box-shadow: 0 2px 10px rgba(109,40,217,.3); }
.adm-btn-create:hover { opacity: .9; }
.adm-btn-sm { font-size: .75rem; padding: 6px 11px; }
.adm-btn-reset { color: var(--am-400); border-color: rgba(217,119,6,.25); }
.adm-btn-del { color: var(--rose-400); border-color: rgba(225,29,72,.2); }
.adm-sync-btn { background: rgba(255,255,255,.2); color: #fff; border: 1px solid rgba(255,255,255,.35); border-radius: 10px; padding: 8px 14px; font-size: .8rem; font-weight: 700; transition: background .15s; }
.adm-sync-btn:hover { background: rgba(255,255,255,.3); }
.adm-sync-btn:disabled { opacity: .6; }
.adm-users { display: flex; flex-direction: column; gap: 8px; }
.adm-user-row { display: flex; align-items: center; gap: 12px; background: var(--surface); border: 1px solid var(--b2); border-radius: 12px; padding: 12px 14px; transition: border-color .15s; flex-wrap: wrap; }
.adm-user-row:hover { border-color: var(--b3); }
.adm-user-row.inactive { opacity: .5; }
.adm-user-avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--grad-v); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1rem; flex-shrink: 0; }
.adm-user-info { flex: 1; min-width: 120px; }
.adm-user-name { font-size: .9rem; font-weight: 700; color: var(--t1); margin-bottom: 2px; }
.adm-user-stats { font-size: .72rem; color: var(--t3); }
.adm-user-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.adm-badge-off { background: rgba(225,29,72,.1); color: var(--rose-400); font-size: .65rem; font-weight: 800; padding: 2px 7px; border-radius: 8px; margin-left: 6px; }
.adm-msg { padding: 9px 13px; border-radius: 9px; font-size: .82rem; font-weight: 600; margin-top: 8px; }
.adm-msg.ok { background: rgba(5,150,105,.08); color: var(--em-400); border: 1px solid rgba(5,150,105,.18); }
.adm-msg.err { background: rgba(225,29,72,.08); color: var(--rose-400); border: 1px solid rgba(225,29,72,.18); }
.adm-msg.hidden { display: none; }
.adm-modal { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px); padding: 20px; }
.adm-modal.hidden { display: none; }
.adm-modal-card { background: #fff; border: 1px solid var(--b3); border-radius: 16px; padding: 24px; width: 100%; max-width: 340px; box-shadow: var(--sh3); }

/* ── RESPONSIVE ── */
@media (max-width: 700px) {
  :root { --hh: 56px; --sw: 284px; }
  .sidebar { position: fixed; top: var(--hh); left: 0; right: 0; bottom: var(--nh); z-index: 35; width: 100%; height: calc(100vh - var(--hh) - var(--nh)); transform: translateX(-100%); box-shadow: 0 8px 40px rgba(109,40,217,.25); border-right: none; backdrop-filter: none; background: #fff; overflow: hidden; }
  .sidebar.open { transform: translateX(0); }
  .sidebar .sb-inner { height: 100%; overflow-y: auto; -webkit-overflow-scrolling: touch; }
  .sb-close { display: flex; position: absolute; top: 12px; right: 12px; z-index: 2; width: 34px; height: 34px; border-radius: 50%; background: var(--card2); border: 1px solid var(--b2); align-items: center; justify-content: center; color: var(--t2); font-size: 1rem; cursor: pointer; }
  .app-body { bottom: var(--nh); }
  .mnav-bar { display: flex; }
  .stat-chip.fire, .stat-chip.words { display: none; }
  .msg-bubble { max-width: 86%; } .msg.user .msg-bubble { max-width: 90%; }
  .messages-area { padding: 16px 12px; gap: 16px; }
  .toolbar { padding: 6px 10px 0; gap: 4px; }
  .t-btn { font-size: .72rem; padding: 5px 10px; }
  .input-row { padding: 8px 10px 12px; gap: 7px; }
  .panel { margin: 0 8px 6px; }
  .panel-content { max-height: 40vh; overflow-y: auto; }
  .hd-menu { width: 100%; border-radius: 0 0 18px 18px; }
  .level-dd { right: 8px; width: 200px; }
  .login-card { padding: 28px 20px 22px; }
}
@media (min-width: 701px) and (max-width: 1040px) { :root { --sw: 214px; } }
@media (min-width: 1300px) { .messages-area { padding: 32px 36px; } .msg-bubble { max-width: 60%; } .msg.user .msg-bubble { max-width: 68%; } }