/* ─────────────────────────────────────────────────────────────────────────────
   Repetio — Premium UI
   ───────────────────────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300..900&display=swap');

:root {
  --bg:           #07090f;
  --bg-mid:       #0c0f1d;
  --surface:      rgba(255,255,255,0.04);
  --surface-hi:   rgba(255,255,255,0.07);
  --border:       rgba(255,255,255,0.08);
  --border-hi:    rgba(255,255,255,0.16);
  --accent:       #6366f1;
  --accent-2:     #8b5cf6;
  --accent-light: #a5b4fc;
  --accent-dim:   rgba(99,102,241,0.14);
  --accent-glow:  rgba(99,102,241,0.32);
  --green:        #34d399;
  --green-dim:    rgba(52,211,153,0.1);
  --red:          #f87171;
  --red-dim:      rgba(248,113,113,0.1);
  --yellow:       #fbbf24;
  --text:         #edf0f7;
  --text-muted:   #7b849a;
  --text-dim:     #3e4760;
  --radius:       12px;
  --radius-lg:    18px;
  --ease:         cubic-bezier(0.4,0,0.2,1);
  --t:            0.18s;
}

/* ── Reset ────────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Base ─────────────────────────────────────────────────────────────────── */

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ambient glow orbs */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
body::before {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, transparent 65%);
  top: -200px; left: -200px;
  filter: blur(40px);
}
body::after {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(139,92,246,0.07) 0%, transparent 65%);
  bottom: -150px; right: -150px;
  filter: blur(40px);
}

/* ── Header ───────────────────────────────────────────────────────────────── */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7,9,15,0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(130deg, #818cf8 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subject-tag {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 500;
  margin-left: auto;
}

/* ── Main ─────────────────────────────────────────────────────────────────── */

.main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  position: relative;
  z-index: 1;
}

/* ── Mode toggle ──────────────────────────────────────────────────────────── */

.mode-toggle-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.mode-toggle {
  display: flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px;
  gap: 3px;
}

.mode-btn {
  background: none;
  border: none;
  border-radius: 10px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 7px 13px;
  white-space: nowrap;
  transition: all var(--t) var(--ease);
}

.mode-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 14px var(--accent-glow);
}

.mode-btn:hover:not(.active) {
  background: var(--surface-hi);
  color: var(--text);
}

.ncvvo-pill {
  margin-left: auto;
  font-size: 0.68rem;
  color: var(--accent-light);
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.22);
  border-radius: 20px;
  padding: 4px 12px;
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* ── Subject grid ─────────────────────────────────────────────────────────── */

.subject-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.subj-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 16px;
  transition: all var(--t) var(--ease);
}

.subj-btn:hover:not(.active) {
  background: var(--surface-hi);
  border-color: var(--border-hi);
  color: var(--text);
}

.subj-btn.active {
  background: var(--accent-dim);
  border-color: rgba(99,102,241,0.4);
  color: var(--accent-light);
  font-weight: 600;
}

/* ── Generator form ───────────────────────────────────────────────────────── */

.generator-panel { animation: fadeUp 0.3s var(--ease); }

.gen-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gen-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 4px;
}

.gen-subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 22px;
}

.field-group { margin-bottom: 20px; }

.topic-row { display: flex; gap: 8px; margin-bottom: 12px; }

.topic-input {
  flex: 1;
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.93rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.topic-input:focus {
  border-color: rgba(99,102,241,0.5);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.topic-input::placeholder { color: var(--text-dim); }

.btn-photo {
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  padding: 0 13px;
  transition: all var(--t) var(--ease);
}

.btn-photo:hover {
  border-color: rgba(99,102,241,0.4);
  color: var(--accent-light);
  background: var(--accent-dim);
}

/* ── Image preview ────────────────────────────────────────────────────────── */

.image-preview-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 12px;
}

.image-preview {
  width: 50px; height: 50px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.image-label { font-size: 0.83rem; color: var(--text-muted); flex: 1; }

.btn-remove-image {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 5px 8px;
  border-radius: 7px;
  transition: all var(--t) var(--ease);
}

.btn-remove-image:hover { color: var(--red); background: var(--red-dim); }

/* ── Domain pills ─────────────────────────────────────────────────────────── */

.domain-pills { display: flex; flex-wrap: wrap; gap: 5px; }
.domain-group { display: flex; flex-wrap: wrap; gap: 5px; }

.pill {
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.73rem;
  padding: 4px 11px;
  transition: all var(--t) var(--ease);
}

.pill:hover, .pill.active {
  background: var(--accent-dim);
  border-color: rgba(99,102,241,0.35);
  color: var(--accent-light);
}

/* ── Options row (difficulty / count) ────────────────────────────────────── */

.options-row { display: flex; gap: 20px; margin-bottom: 20px; flex-wrap: wrap; }
.option-group { display: flex; flex-direction: column; gap: 8px; }

.option-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
}

.segmented {
  display: flex;
  background: rgba(0,0,0,0.24);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.seg-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  padding: 8px 16px;
  transition: all var(--t) var(--ease);
}

.seg-btn + .seg-btn { border-left: 1px solid var(--border); }
.seg-btn.active { background: var(--accent-dim); color: var(--accent-light); font-weight: 600; }
.seg-btn:hover:not(.active) { background: var(--surface-hi); color: var(--text); }

/* ── Generate button ──────────────────────────────────────────────────────── */

.btn-generate {
  width: 100%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.96rem;
  font-weight: 600;
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 22px var(--accent-glow);
  letter-spacing: 0.01em;
  transition: all var(--t) var(--ease);
}

.btn-generate:hover { opacity: 0.88; transform: translateY(-1px); box-shadow: 0 6px 30px var(--accent-glow); }
.btn-generate:active { transform: translateY(0); }
.btn-generate:disabled { opacity: 0.38; cursor: default; transform: none; box-shadow: none; }

.error-msg {
  color: var(--red);
  font-size: 0.83rem;
  margin-top: 12px;
  text-align: center;
}

/* ── Quiz ─────────────────────────────────────────────────────────────────── */

.quiz-panel { animation: fadeUp 0.28s var(--ease); }

.quiz-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.quiz-progress-wrap {
  flex: 1;
  background: var(--surface);
  border-radius: 4px;
  height: 4px;
  overflow: hidden;
}

.quiz-progress-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  height: 100%;
  border-radius: 4px;
  transition: width 0.4s var(--ease);
  width: 0%;
  box-shadow: 0 0 10px var(--accent-glow);
}

.quiz-progress-label {
  color: var(--text-dim);
  font-size: 0.77rem;
  font-weight: 600;
  white-space: nowrap;
}

.question-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  animation: fadeUp 0.22s var(--ease);
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.question-domain {
  color: var(--accent-light);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.22);
  border-radius: 6px;
  padding: 3px 9px;
}

.question-subject {
  color: var(--text-dim);
  font-size: 0.72rem;
}

.question-text {
  font-size: 1.06rem;
  font-weight: 500;
  margin-bottom: 22px;
  line-height: 1.62;
  letter-spacing: -0.1px;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.option-btn {
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.91rem;
  padding: 12px 16px;
  text-align: left;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  transition: all var(--t) var(--ease);
}

.option-btn:hover:not(:disabled) {
  border-color: rgba(99,102,241,0.4);
  background: var(--accent-dim);
  transform: translateX(4px);
}

.option-btn .opt-key {
  color: var(--text-dim);
  font-weight: 700;
  min-width: 18px;
  font-size: 0.76rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.option-btn.correct { background: var(--green-dim); border-color: rgba(52,211,153,0.4); }
.option-btn.correct .opt-key { color: var(--green); }
.option-btn.wrong { background: var(--red-dim); border-color: rgba(248,113,113,0.4); }
.option-btn.wrong .opt-key { color: var(--red); }
.option-btn:disabled { cursor: default; transform: none; }

/* ── Explanation ──────────────────────────────────────────────────────────── */

.explanation-box {
  background: rgba(0,0,0,0.18);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 16px;
  animation: fadeUp 0.2s var(--ease);
}

.explanation-text {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.58;
}

.ncvvo-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.28);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.73rem;
}

.ncvvo-badge .badge-id { font-weight: 700; color: var(--accent-light); }
.ncvvo-badge .badge-sep { color: var(--text-dim); }
.ncvvo-badge .badge-ishod { color: var(--text-muted); font-size: 0.7rem; }

/* ── Next / Finish ────────────────────────────────────────────────────────── */

.btn-next {
  width: 100%;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.91rem;
  font-weight: 500;
  padding: 12px;
  transition: all var(--t) var(--ease);
}

.btn-next:hover {
  border-color: rgba(99,102,241,0.4);
  color: var(--accent-light);
  background: var(--accent-dim);
}

/* ── Results ──────────────────────────────────────────────────────────────── */

.results-panel { animation: fadeUp 0.35s var(--ease); }

.results-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px 28px 36px;
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.results-score {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 8px;
}

.score-good { color: var(--green); text-shadow: 0 0 40px rgba(52,211,153,0.4); }
.score-mid  { color: var(--yellow); text-shadow: 0 0 40px rgba(251,191,36,0.35); }
.score-low  { color: var(--red); text-shadow: 0 0 40px rgba(248,113,113,0.35); }

.results-label { color: var(--text-muted); font-size: 0.96rem; margin-bottom: 30px; }

.results-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0 auto 28px;
  text-align: left;
  max-width: 420px;
}

.breakdown-row { display: flex; gap: 10px; font-size: 0.82rem; }

.breakdown-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  margin-top: 5px;
  flex-shrink: 0;
}

.breakdown-dot.ok   { background: var(--green); box-shadow: 0 0 6px rgba(52,211,153,0.6); }
.breakdown-dot.fail { background: var(--red);   box-shadow: 0 0 6px rgba(248,113,113,0.5); }
.breakdown-label { color: var(--text-muted); }

.results-canned-note { font-size: 0.75rem; color: var(--text-dim); margin-bottom: 16px; }

.btn-restart {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 12px 34px;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: all var(--t) var(--ease);
}

.btn-restart:hover { opacity: 0.86; transform: translateY(-1px); }

/* ── Weakness Analyzer ────────────────────────────────────────────────────── */

.weakness-block {
  margin: 24px auto 0;
  border-top: 1px solid var(--border);
  padding-top: 22px;
  text-align: left;
  max-width: 420px;
}

.weakness-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.weakness-item { margin-bottom: 18px; }

.weakness-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}

.weakness-domain { font-size: 0.87rem; font-weight: 500; }
.weakness-stat { font-size: 0.73rem; color: var(--text-dim); }

.weakness-bar-wrap {
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  height: 5px;
  overflow: hidden;
  margin-bottom: 5px;
}

.weakness-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--red), #fb923c);
  border-radius: 4px;
  transition: width 0.5s var(--ease);
}

.weakness-ids {
  font-size: 0.67rem;
  color: var(--text-dim);
  font-family: 'SF Mono', 'Fira Code', ui-monospace, monospace;
}

/* ── Chat ─────────────────────────────────────────────────────────────────── */

.chat-wrap {
  display: flex;
  flex-direction: column;
  min-height: 480px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  animation: fadeUp 0.3s var(--ease);
}

.chat-intro {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 52px 28px 32px;
  text-align: center;
  gap: 6px;
}

.chat-intro-icon {
  width: 54px; height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 17px;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.chat-intro-text {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.chat-intro-sub {
  font-size: 0.83rem;
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.55;
  margin-bottom: 18px;
}

.chat-starter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: center;
}

.starter-pill {
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.78rem;
  padding: 6px 14px;
  transition: all var(--t) var(--ease);
}

.starter-pill:hover {
  background: var(--accent-dim);
  border-color: rgba(99,102,241,0.35);
  color: var(--accent-light);
  transform: translateY(-1px);
}

.chat-messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 22px;
  overflow-y: auto;
  max-height: 460px;
}

.chat-messages::-webkit-scrollbar { width: 3px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.chat-message {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: fadeUp 0.2s var(--ease);
}

.chat-message.msg-user { align-self: flex-end; align-items: flex-end; }
.chat-message.msg-bot  { align-self: flex-start; align-items: flex-start; }

.msg-bubble {
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.6;
  padding: 11px 15px;
}

.msg-user .msg-bubble {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-bot .msg-bubble {
  background: rgba(0,0,0,0.24);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.msg-ncvvo {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.22);
  border-radius: 7px;
  padding: 3px 9px;
  font-size: 0.68rem;
  color: var(--accent-light);
  margin-top: 6px;
  font-weight: 600;
}

.msg-ncvvo-sep { color: var(--text-dim); }
.msg-ncvvo-ishod { color: var(--text-muted); font-weight: 400; }
.msg-typing .msg-bubble { color: var(--text-dim); font-style: italic; }

.chat-input-wrap {
  border-top: 1px solid var(--border);
  padding: 14px 18px 12px;
  background: rgba(0,0,0,0.14);
}

.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.91rem;
  padding: 10px 14px;
  resize: none;
  outline: none;
  line-height: 1.5;
  max-height: 140px;
  overflow-y: auto;
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.chat-input:focus {
  border-color: rgba(99,102,241,0.5);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.chat-input::placeholder { color: var(--text-dim); }

.chat-send-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  flex-shrink: 0;
  box-shadow: 0 2px 12px var(--accent-glow);
  transition: all var(--t) var(--ease);
}

.chat-send-btn:hover { opacity: 0.84; transform: scale(1.05); }
.chat-send-btn:disabled { opacity: 0.32; cursor: default; transform: none; box-shadow: none; }

.chat-footer-note {
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 8px;
  text-align: center;
}

/* ── Utilities ────────────────────────────────────────────────────────────── */

.hidden { display: none !important; }

.spinner {
  width: 17px; height: 17px;
  border: 2px solid rgba(255,255,255,0.28);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}

/* ── Animations ───────────────────────────────────────────────────────────── */

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Explain wrong answer ─────────────────────────────────────────────────── */

.btn-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn-explain {
  width: 100%;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 500;
  padding: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--t) var(--ease);
}

.btn-explain:hover {
  border-color: rgba(99,102,241,0.4);
  color: var(--accent-light);
  background: var(--accent-dim);
}

.explain-chat {
  margin-top: 12px;
  background: rgba(0,0,0,0.15);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.explain-messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 16px;
  max-height: 220px;
  overflow-y: auto;
}

.explain-messages::-webkit-scrollbar { width: 3px; }
.explain-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.explain-input-row {
  display: flex;
  gap: 7px;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}

.explain-input {
  flex: 1;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.86rem;
  padding: 8px 12px;
  outline: none;
  transition: border-color var(--t) var(--ease);
}

.explain-input:focus { border-color: rgba(99,102,241,0.5); }
.explain-input::placeholder { color: var(--text-dim); }

/* ── Mock Matura ──────────────────────────────────────────────────────────── */

.matura-subjects-wrap { margin-bottom: 20px; }

.matura-meta {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.matura-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.matura-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.matura-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.matura-subject-badge {
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 20px;
  color: var(--accent-light);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
}

.matura-qcount {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.matura-timer {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  transition: color var(--t) var(--ease);
}

.matura-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  margin-bottom: 12px;
}

.matura-nav .btn-next { flex: 0 0 auto; width: auto; padding: 9px 18px; font-size: 0.84rem; }

.matura-dots {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  justify-content: center;
}

.matura-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--t) var(--ease);
}

.matura-dot.answered { background: var(--accent-dim); border-color: rgba(99,102,241,0.5); }
.matura-dot.current  { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 6px var(--accent-glow); }

.matura-submit-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
}

.matura-submit-row .matura-submit {
  flex: 1;
  margin-top: 0;
}

.matura-answered-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

.matura-result-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 6px;
}

.matura-result-btns .btn-next {
  width: auto;
  padding: 11px 22px;
}

.matura-review { animation: fadeUp 0.25s var(--ease); }

.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.matura-dot.wrong-dot {
  background: var(--red-dim);
  border-color: rgba(248,113,113,0.4);
}

.option-btn.matura-selected {
  background: var(--accent-dim);
  border-color: rgba(99,102,241,0.5);
}

.matura-results-header {
  margin-bottom: 24px;
}

.matura-results-subject {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 10px;
}

.matura-grade {
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 8px;
}

.matura-stats {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.matura-stat-pill {
  background: var(--surface-hi);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 4px 12px;
}

/* ── KaTeX dark theme fix ─────────────────────────────────────────────────── */

.katex { color: var(--text); font-size: 1em; }
.katex-display { margin: 8px 0; overflow-x: auto; }

/* ── Mobile ───────────────────────────────────────────────────────────────── */

@media (max-width: 520px) {
  .main { padding: 20px 16px 60px; }
  .header-inner { padding: 12px 16px; }
  .gen-form, .question-card, .results-card { padding: 20px 16px; }
  .results-score { font-size: 3.2rem; }
  .mode-btn { padding: 6px 12px; font-size: 0.82rem; }
  .chat-wrap { min-height: 400px; }
  .chat-messages { max-height: 360px; }
  .subj-btn { font-size: 0.78rem; padding: 5px 12px; }
}

/* ── Account indicator (header) ───────────────────────────────────────────── */

.account-indicator {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  padding: 4px 11px;
  transition: all var(--t) var(--ease);
}

.account-indicator:hover {
  border-color: rgba(99,102,241,0.4);
  color: var(--accent-light);
}

.compare-link {
  font-size: .75rem;
  font-weight: 700;
  color: #5c6bc0;
  text-decoration: none;
  border: 1px solid rgba(92,107,192,.4);
  border-radius: 6px;
  padding: .25rem .6rem;
  white-space: nowrap;
}


/* ── Progress summary bar ── */
.progress-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(99,102,241,.08);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 8px;
  padding: 8px 14px;
  margin-bottom: 14px;
  font-size: .78rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}
.progress-summary.hidden { display: none; }
.ps-count { font-weight: 700; color: var(--accent); }
.ps-score { color: var(--text-dim); }
.ps-weak  { color: #f59e0b; font-weight: 600; }