/* ─────────────────────────────────────────
   HexaQuest AI Doubt Solver v4 — Stylesheet
   ───────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --hq-bg:      #0d1117;
  --hq-surface: #161b22;
  --hq-border:  #30363d;
  --hq-orange:  #f97316;
  --hq-orange2: #fb923c;
  --hq-blue:    #38bdf8;
  --hq-green:   #4ade80;
  --hq-red:     #f87171;
  --hq-text:    #e6edf3;
  --hq-muted:   #8b949e;
  --hq-radius:  12px;
  --hq-font:    'Sora', sans-serif;
  --hq-mono:    'JetBrains Mono', monospace;
}

/* ── Wrapper ── */
#hqds-wrap {
  font-family: var(--hq-font);
  background: var(--hq-bg);
  color: var(--hq-text);
  border: 1px solid var(--hq-border);
  border-radius: 16px;
  padding: 28px;
  max-width: 780px;
  margin: 24px auto;
  box-shadow: 0 0 40px rgba(249,115,22,.12);
}

/* ── Header ── */
.hqds-header {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 20px; padding-bottom: 18px;
  border-bottom: 1px solid var(--hq-border);
}
.hqds-title { font-size:1.4rem; font-weight:700; margin:0 0 2px; color:var(--hq-orange); letter-spacing:-.5px; }
.hqds-sub   { font-size:.78rem; color:var(--hq-muted); margin:0; }

/* ── History Toggle ── */
.hqds-history-toggle {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  color:var(--hq-muted); border-radius:8px; padding:7px 14px;
  font-family:var(--hq-font); font-size:.82rem; font-weight:600;
  cursor:pointer; transition:all .2s; white-space:nowrap;
}
.hqds-history-toggle:hover, .hqds-history-toggle.active {
  border-color:var(--hq-orange); color:var(--hq-orange);
}



/* ── Quota Bar ── */
.hqds-quota-bar {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  border-radius:var(--hq-radius); padding:12px 16px; margin-bottom:18px;
}
.hqds-quota-info {
  display:flex; justify-content:space-between;
  font-size:.82rem; margin-bottom:8px; color:var(--hq-muted);
}
.hqds-quota-info span:first-child { font-weight:600; color:var(--hq-text); }
.hqds-quota-track { height:6px; background:rgba(255,255,255,.08); border-radius:4px; overflow:hidden; }
.hqds-quota-fill  {
  height:100%; background:linear-gradient(90deg,var(--hq-orange),var(--hq-orange2));
  border-radius:4px; transition:width .5s ease;
}
.hqds-quota-fill.full { background:var(--hq-red); }
.hqds-quota-note { font-size:.75rem; color:var(--hq-muted); margin:8px 0 0; text-align:center; }

/* ── Daily Limit Wall ── */
.hqds-limit-wall {
  text-align:center; padding:36px 20px;
  background:rgba(248,113,113,.05);
  border:1px solid rgba(248,113,113,.18);
  border-radius:var(--hq-radius);
}
.hqds-limit-icon { font-size:2.4rem; margin-bottom:10px; }
.hqds-limit-wall h3 { font-size:1.1rem; font-weight:700; color:var(--hq-red); margin:0 0 10px; }
.hqds-limit-wall p  { font-size:.87rem; color:var(--hq-muted); margin:0 0 8px; line-height:1.6; }
.hqds-limit-btn {
  display:inline-block; margin-top:14px;
  background:linear-gradient(135deg,var(--hq-orange),var(--hq-orange2));
  color:#fff; font-family:var(--hq-font); font-weight:700; font-size:.9rem;
  padding:10px 26px; border-radius:8px; text-decoration:none; transition:opacity .2s;
}
.hqds-limit-btn:hover { opacity:.88; color:#fff; }
.hqds-reset-note { font-size:.75rem; color:var(--hq-muted); margin-top:10px !important; }

/* ── Subject Tabs ── */
.hqds-tabs { display:flex; gap:8px; margin-bottom:18px; flex-wrap:wrap; }
.hqds-tab {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  color:var(--hq-muted); border-radius:8px; padding:8px 18px;
  font-family:var(--hq-font); font-size:.85rem; font-weight:600;
  cursor:pointer; transition:all .2s;
}
.hqds-tab:hover { border-color:var(--hq-orange); color:var(--hq-orange); }
.hqds-tab.active { background:var(--hq-orange); border-color:var(--hq-orange); color:#fff; }

/* ── Mode ── */
.hqds-modes { display:flex; gap:16px; margin-bottom:16px; flex-wrap:wrap; }
.hqds-mode-opt {
  display:flex; align-items:center; gap:7px;
  cursor:pointer; font-size:.85rem; color:var(--hq-muted); transition:color .2s;
}
.hqds-mode-opt:hover { color:var(--hq-text); }
.hqds-mode-opt input[type="radio"] { accent-color:var(--hq-orange); }
.hqds-mode-opt input[type="radio"]:checked + span { color:var(--hq-orange); font-weight:600; }

/* ── Textarea ── */
.hqds-input-area { margin-bottom:16px; }
#hqds-question, #hqds-wrong-answer {
  width:100%; background:var(--hq-surface); border:1px solid var(--hq-border);
  border-radius:var(--hq-radius); color:var(--hq-text);
  font-family:var(--hq-font); font-size:.9rem; padding:14px 16px;
  resize:vertical; transition:border-color .2s; box-sizing:border-box;
}
#hqds-question:focus, #hqds-wrong-answer:focus {
  outline:none; border-color:var(--hq-orange); box-shadow:0 0 0 3px rgba(249,115,22,.15);
}
#hqds-wrong-box { margin-top:10px; }
#hqds-wrong-answer { border-color:var(--hq-red); }
#hqds-wrong-answer:focus { border-color:var(--hq-red); box-shadow:0 0 0 3px rgba(248,113,113,.15); }

/* ── Image Upload ── */
.hqds-upload-row { display:flex; align-items:center; gap:12px; margin-top:12px; flex-wrap:wrap; }
.hqds-upload-btn {
  display:inline-flex; align-items:center; gap:6px;
  background:var(--hq-surface); border:1px dashed var(--hq-border);
  border-radius:8px; color:var(--hq-muted); padding:7px 14px;
  font-size:.8rem; cursor:pointer; transition:all .2s;
}
.hqds-upload-btn:hover { border-color:var(--hq-orange); color:var(--hq-orange); }
#hqds-img-name { font-size:.8rem; color:var(--hq-muted); }
#hqds-img-preview-wrap { display:flex; align-items:center; gap:8px; }
#hqds-img-preview { height:48px; border-radius:6px; border:1px solid var(--hq-border); }
#hqds-img-remove { background:none; border:none; color:var(--hq-red); cursor:pointer; font-size:1rem; padding:2px 4px; }

/* ── Submit Button ── */
.hqds-btn-submit {
  width:100%; padding:14px;
  background:linear-gradient(135deg,var(--hq-orange),var(--hq-orange2));
  border:none; border-radius:var(--hq-radius); color:#fff;
  font-family:var(--hq-font); font-size:1rem; font-weight:700;
  cursor:pointer; display:flex; align-items:center; justify-content:center; gap:10px;
  transition:opacity .2s,transform .1s;
}
.hqds-btn-submit:hover   { opacity:.92; transform:translateY(-1px); }
.hqds-btn-submit:active  { transform:translateY(0); }
.hqds-btn-submit:disabled { opacity:.5; cursor:not-allowed; transform:none; }

/* Spinner */
.hqds-spinner {
  width:18px; height:18px;
  border:2.5px solid rgba(255,255,255,.3); border-top-color:#fff;
  border-radius:50%; animation:hq-spin .7s linear infinite;
}
@keyframes hq-spin { to { transform:rotate(360deg); } }

/* ── Error ── */
.hqds-error {
  background:rgba(248,113,113,.1); border:1px solid var(--hq-red);
  border-radius:var(--hq-radius); color:var(--hq-red); padding:12px 16px;
  font-size:.87rem; margin-top:14px;
}

/* ── Result ── */
#hqds-result { margin-top:24px; animation:hq-fade .4s ease; }
@keyframes hq-fade { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:none} }

.hqds-concepts { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:16px; }
.hqds-concept-tag {
  background:rgba(56,189,248,.12); border:1px solid rgba(56,189,248,.3);
  color:var(--hq-blue); border-radius:20px; padding:4px 12px;
  font-size:.77rem; font-weight:600; letter-spacing:.3px;
}
.hqds-meta-tag {
  background:rgba(74,222,128,.1); border:1px solid rgba(74,222,128,.25);
  color:var(--hq-green); border-radius:20px; padding:4px 12px;
  font-size:.77rem; font-weight:600;
}
.hqds-solution-box {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  border-left:3px solid var(--hq-orange); border-radius:var(--hq-radius);
  padding:20px; line-height:1.8; font-size:.9rem; margin-bottom:14px;
}
.hqds-solution-box b { color:var(--hq-orange); }
.hqds-mistake-box {
  background:rgba(248,113,113,.07); border:1px solid rgba(248,113,113,.3);
  border-left:3px solid var(--hq-red); border-radius:var(--hq-radius);
  padding:16px 20px; font-size:.87rem; line-height:1.7; margin-bottom:14px; color:#fca5a5;
}
.hqds-mistake-box::before {
  content:'❌ Where You Went Wrong'; display:block; font-weight:700;
  color:var(--hq-red); margin-bottom:8px; font-size:.78rem; letter-spacing:.5px; text-transform:uppercase;
}
.hqds-result-actions { display:flex; justify-content:flex-end; }
.hqds-btn-clear {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  color:var(--hq-muted); border-radius:8px; padding:8px 18px;
  font-family:var(--hq-font); font-size:.82rem; cursor:pointer; transition:all .2s;
}
.hqds-btn-clear:hover { border-color:var(--hq-orange); color:var(--hq-orange); }

/* ════════════════════════════════
   HISTORY PANEL
════════════════════════════════ */
#hqds-history-panel { margin-top:4px; animation:hq-fade .3s ease; }

.hqds-hist-cap-note {
  background:rgba(56,189,248,.07); border:1px solid rgba(56,189,248,.2);
  border-radius:8px; padding:9px 14px; font-size:.8rem;
  color:var(--hq-blue); margin-bottom:14px; text-align:center; line-height:1.5;
}

.hqds-hist-toolbar {
  display:flex; justify-content:space-between; align-items:center;
  margin-bottom:16px; gap:12px; flex-wrap:wrap;
}
.hqds-hist-filters { display:flex; gap:6px; flex-wrap:wrap; }
.hqds-hf {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  color:var(--hq-muted); border-radius:20px; padding:5px 14px;
  font-family:var(--hq-font); font-size:.8rem; font-weight:600; cursor:pointer; transition:all .2s;
}
.hqds-hf:hover { border-color:var(--hq-orange); color:var(--hq-orange); }
.hqds-hf.active { background:var(--hq-orange); border-color:var(--hq-orange); color:#fff; }

.hqds-clear-hist-btn {
  background:none; border:1px solid rgba(248,113,113,.4); color:var(--hq-red);
  border-radius:8px; padding:5px 12px; font-family:var(--hq-font);
  font-size:.78rem; cursor:pointer; transition:all .2s;
}
.hqds-clear-hist-btn:hover { background:rgba(248,113,113,.1); }

.hqds-hist-loading, .hqds-hist-empty {
  text-align:center; padding:32px; color:var(--hq-muted);
  font-size:.88rem; display:flex; align-items:center; justify-content:center; gap:10px;
}
#hqds-hist-list { display:flex; flex-direction:column; gap:10px; }

.hqds-hist-card {
  background:var(--hq-surface); border:1px solid var(--hq-border);
  border-radius:var(--hq-radius); padding:14px 16px;
  cursor:pointer; transition:border-color .2s,transform .15s;
  display:grid; grid-template-columns:1fr auto; gap:6px; align-items:start;
}
.hqds-hist-card:hover { border-color:var(--hq-orange); transform:translateX(3px); }
.hqds-hist-card-q {
  font-size:.88rem; color:var(--hq-text); line-height:1.5;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
}
.hqds-hist-card-meta { display:flex; gap:6px; align-items:center; margin-top:6px; flex-wrap:wrap; }
.hqds-hist-subj {
  font-size:.72rem; font-weight:700; padding:2px 9px; border-radius:10px;
  background:rgba(249,115,22,.15); color:var(--hq-orange);
}
.hqds-hist-mode-badge {
  font-size:.7rem; padding:2px 8px; border-radius:10px;
  background:rgba(248,113,113,.12); color:var(--hq-red);
}
.hqds-hist-diff  { font-size:.72rem; color:var(--hq-muted); }
.hqds-hist-date  { font-size:.72rem; color:var(--hq-muted); font-family:var(--hq-mono); }
.hqds-hist-del {
  background:none; border:none; color:transparent;
  font-size:.85rem; cursor:pointer; padding:4px; border-radius:6px; transition:all .2s; line-height:1;
}
.hqds-hist-card:hover .hqds-hist-del { color:var(--hq-red); }
.hqds-hist-del:hover { background:rgba(248,113,113,.1); }

#hqds-hist-detail { animation:hq-fade .3s ease; }
.hqds-hist-back {
  background:none; border:1px solid var(--hq-border); color:var(--hq-muted);
  border-radius:8px; padding:6px 14px; font-family:var(--hq-font);
  font-size:.82rem; cursor:pointer; margin-bottom:16px; transition:all .2s;
}
.hqds-hist-back:hover { border-color:var(--hq-orange); color:var(--hq-orange); }

/* ── Responsive ── */
@media (max-width:500px) {
  #hqds-wrap  { padding:18px 14px; }
  .hqds-tabs  { gap:6px; }
  .hqds-tab   { padding:7px 12px; font-size:.8rem; }
  .hqds-hist-toolbar { flex-direction:column; align-items:flex-start; }
}