/* ============================================================
   Quiz Patente B — Design system (dark neon, premium, zero-dep)
   ============================================================ */

:root {
  --bg: #05060b;
  --bg-2: #0a0c16;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.075);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.18);

  --text: #eef1f8;
  --text-dim: #9aa3b8;
  --text-faint: #626b82;

  --cyan: #22d3ee;
  --blue: #6366f1;
  --violet: #a855f7;
  --magenta: #e879f9;
  --green: #34d399;
  --green-soft: rgba(52, 211, 153, 0.14);
  --red: #fb5a6a;
  --red-soft: rgba(251, 90, 106, 0.14);
  --amber: #fbbf24;

  --radius: 20px;
  --radius-sm: 12px;
  --ease-spring: cubic-bezier(0.34, 1.4, 0.5, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  --grad-primary: linear-gradient(135deg, #22d3ee 0%, #6366f1 52%, #a855f7 100%);
  --grad-text: linear-gradient(120deg, #67e8f9, #a78bfa 55%, #f0abfc);
  --shadow-card: 0 24px 70px -30px rgba(0, 0, 0, 0.85);
  --shadow-glow: 0 0 40px -8px rgba(99, 102, 241, 0.55);

  --font: 'Inter', 'Segoe UI Variable', 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
}

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

html, body { height: 100%; }

body {
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1200px 800px at 15% -10%, #10162e 0%, transparent 55%),
              radial-gradient(1000px 700px at 110% 10%, #1a0f2e 0%, transparent 50%),
              var(--bg);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: rgba(168, 85, 247, 0.35); color: #fff; }

/* --- Animated aurora backdrop --- */
#aurora { position: fixed; inset: 0; z-index: -1; overflow: hidden; filter: blur(70px); opacity: 0.55; }
#aurora span { position: absolute; display: block; border-radius: 50%; mix-blend-mode: screen; }
#aurora span:nth-child(1) { width: 46vw; height: 46vw; left: -8vw; top: -10vw; background: #1e3a8a; animation: float1 22s ease-in-out infinite; }
#aurora span:nth-child(2) { width: 40vw; height: 40vw; right: -6vw; top: 4vw; background: #6d28d9; animation: float2 26s ease-in-out infinite; }
#aurora span:nth-child(3) { width: 34vw; height: 34vw; left: 32vw; bottom: -14vw; background: #0e7490; animation: float3 30s ease-in-out infinite; }
@keyframes float1 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(6vw, 5vw) scale(1.15); } }
@keyframes float2 { 0%,100% { transform: translate(0,0) scale(1.05); } 50% { transform: translate(-5vw, 6vw) scale(0.9); } }
@keyframes float3 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(3vw, -6vw) scale(1.2); } }

/* --- Layout --- */
.app-root { max-width: 960px; margin: 0 auto; padding: clamp(16px, 4vw, 40px) clamp(14px, 4vw, 28px) 80px; }
.view { animation: viewIn 0.5s var(--ease-out) both; }
@keyframes viewIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 28px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: -0.02em; font-size: 1.05rem; }
.brand .logo { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-size: 20px;
  background: var(--grad-primary); box-shadow: var(--shadow-glow); }
.brand b { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand small { display: block; color: var(--text-faint); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.02em; }

.user-chip { display: flex; align-items: center; gap: 10px; }
.avatar { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 0.85rem;
  color: #05060b; background: linear-gradient(135deg, #67e8f9, #a78bfa); }

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}
.card.pad { padding: clamp(18px, 3vw, 28px); }

/* --- Buttons --- */
.btn {
  --gc1: #6366f1; --gc2: #a855f7;
  appearance: none; border: 0; cursor: pointer; font-family: inherit; font-weight: 650;
  font-size: 0.98rem; color: #fff; padding: 14px 22px; border-radius: 14px;
  background: linear-gradient(135deg, var(--gc1), var(--gc2));
  box-shadow: 0 10px 30px -12px var(--gc2);
  transition: transform 0.18s var(--ease-spring), box-shadow 0.25s var(--ease-out), filter 0.2s;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
}
.btn:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 16px 40px -14px var(--gc2); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.btn.block { width: 100%; }
.btn.lg { padding: 18px 26px; font-size: 1.05rem; border-radius: 16px; }
.btn-ghost { background: var(--surface-2); border: 1px solid var(--border); box-shadow: none; color: var(--text); }
.btn-ghost:hover { border-color: var(--border-strong); background: rgba(255,255,255,0.1); filter: none; }
.btn-cyan { --gc1: #06b6d4; --gc2: #3b82f6; }
.btn-green { --gc1: #10b981; --gc2: #34d399; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; filter: grayscale(0.3); }

.link { color: var(--cyan); text-decoration: none; font-weight: 600; cursor: pointer; }
.link:hover { text-decoration: underline; }

/* --- Login --- */
.login-wrap { min-height: 80dvh; display: grid; place-items: center; }
.login-card { width: min(420px, 100%); padding: 34px 30px; text-align: center; }
.login-logo { width: 74px; height: 74px; border-radius: 22px; margin: 0 auto 18px; display: grid; place-items: center; font-size: 38px;
  background: var(--grad-primary); box-shadow: var(--shadow-glow); animation: pop 0.6s var(--ease-spring) both; }
.login-card h1 { font-size: 1.7rem; letter-spacing: -0.03em; margin-bottom: 4px; }
.login-card h1 b { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.login-card p.sub { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 26px; }

.field { text-align: left; margin-bottom: 14px; }
.field label { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: 7px; font-weight: 600; }
.input {
  width: 100%; padding: 14px 16px; font-size: 1rem; font-family: inherit; color: var(--text);
  background: rgba(0, 0, 0, 0.3); border: 1px solid var(--border); border-radius: 12px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.input::placeholder { color: var(--text-faint); }
.input:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.16); }

.remember { display: flex; align-items: center; gap: 9px; text-align: left; margin: 4px 2px 18px; cursor: pointer; color: var(--text-dim); font-size: 0.86rem; }
.remember input { width: 18px; height: 18px; accent-color: var(--cyan); cursor: pointer; flex: 0 0 auto; }
.remember span { user-select: none; }

.alert { font-size: 0.86rem; padding: 11px 14px; border-radius: 10px; margin-bottom: 14px; text-align: left; }
.alert.err { background: var(--red-soft); border: 1px solid rgba(251,90,106,0.4); color: #ffb3bb; }
.alert.ok { background: var(--green-soft); border: 1px solid rgba(52,211,153,0.4); color: #a7f3d0; }

.fineprint { margin-top: 20px; font-size: 0.76rem; color: var(--text-faint); line-height: 1.5; }
.fineprint b { color: var(--text-dim); }

/* --- Dashboard --- */
.hero { margin-bottom: 26px; }
.hero h2 { font-size: clamp(1.5rem, 4vw, 2.1rem); letter-spacing: -0.03em; }
.hero h2 b { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--text-dim); margin-top: 4px; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
.stat { padding: 18px; text-align: left; }
.stat .k { font-size: 0.74rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.stat .v { font-size: clamp(1.5rem, 4vw, 2rem); font-weight: 800; letter-spacing: -0.03em; margin-top: 6px; line-height: 1; }
.stat .v small { font-size: 0.9rem; color: var(--text-faint); font-weight: 600; }
.stat .v.grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

.cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 22px; }
.cta {
  position: relative; overflow: hidden; padding: 24px; text-align: left; cursor: pointer; border: 1px solid var(--border);
  transition: transform 0.25s var(--ease-spring), border-color 0.25s, box-shadow 0.3s;
}
.cta:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: 0 30px 60px -30px rgba(99,102,241,0.6); }
.cta .ic { font-size: 26px; margin-bottom: 12px; display: block; }
.cta h3 { font-size: 1.15rem; letter-spacing: -0.02em; }
.cta p { color: var(--text-dim); font-size: 0.86rem; margin-top: 4px; }
.cta::after { content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px; border-radius: 50%;
  background: var(--grad-primary); opacity: 0.14; transition: opacity 0.3s; }
.cta:hover::after { opacity: 0.28; }
.cta.exam::after { background: linear-gradient(135deg, #f43f5e, #a855f7); }

.section-title { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.09em; color: var(--text-faint); font-weight: 700; margin: 8px 2px 12px; }

/* weak topics bars */
.bars { display: flex; flex-direction: column; gap: 12px; }
.bar-row { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; align-items: center; }
.bar-row .lbl { font-size: 0.9rem; }
.bar-row .pct { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 0.9rem; }
.bar-track { grid-column: 1 / -1; height: 8px; border-radius: 99px; background: rgba(255,255,255,0.08); overflow: hidden; }
.bar-fill { height: 100%; border-radius: 99px; width: 0; transition: width 1s var(--ease-out); }

.empty { text-align: center; color: var(--text-dim); padding: 26px 10px; font-size: 0.92rem; }

.export-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.export-row .hint { color: var(--text-faint); font-size: 0.8rem; flex: 1 1 180px; }

/* --- Topics grid --- */
.topics-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.topic-card { padding: 16px; cursor: pointer; display: flex; gap: 12px; align-items: center; border: 1px solid var(--border);
  transition: transform 0.2s var(--ease-spring), border-color 0.2s, background 0.2s; }
.topic-card:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--surface-2); }
.topic-card .ring { flex: 0 0 auto; }
.topic-card .meta { min-width: 0; }
.topic-card .meta .name { font-weight: 650; font-size: 0.92rem; line-height: 1.2; }
.topic-card .meta .sub { color: var(--text-faint); font-size: 0.76rem; margin-top: 3px; }

.ring { --p: 0; --sz: 46px; width: var(--sz); height: var(--sz); border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--ring-col, #34d399) calc(var(--p) * 1%), rgba(255,255,255,0.08) 0);
  position: relative; }
.ring::before { content: ""; position: absolute; inset: 4px; border-radius: 50%; background: #0a0c16; }
.ring span { position: relative; font-size: 0.7rem; font-weight: 800; font-variant-numeric: tabular-nums; }

/* --- Quiz --- */
.quiz-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.quiz-head .counter { font-weight: 700; font-variant-numeric: tabular-nums; }
.quiz-head .counter small { color: var(--text-faint); font-weight: 500; }
.quiz-head .spacer { flex: 1; }
.topic-pill { font-size: 0.74rem; padding: 5px 11px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); }

.timer { display: flex; align-items: center; gap: 8px; font-variant-numeric: tabular-nums; font-weight: 800; font-size: 1.05rem;
  padding: 6px 14px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border); }
.timer.warn { color: var(--amber); border-color: rgba(251,191,36,0.5); }
.timer.danger { color: var(--red); border-color: rgba(251,90,106,0.6); animation: pulse 1s ease-in-out infinite; }

.progress { height: 6px; border-radius: 99px; background: rgba(255,255,255,0.08); overflow: hidden; margin-bottom: 22px; }
.progress > i { display: block; height: 100%; background: var(--grad-primary); border-radius: 99px; transition: width 0.4s var(--ease-out); }

.q-card { padding: clamp(22px, 4vw, 34px); text-align: center; }
.q-card.correct { animation: flashGreen 0.6s var(--ease-out); }
.q-card.wrong { animation: flashRed 0.6s var(--ease-out), shake 0.4s; }
.q-num { color: var(--text-faint); font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase; font-weight: 600; }
.q-text { font-size: clamp(1.15rem, 3.4vw, 1.5rem); line-height: 1.4; letter-spacing: -0.02em; margin: 12px 0 6px; font-weight: 600; }
.q-image { max-width: 220px; margin: 14px auto 4px; border-radius: 12px; display: block; }

.answers { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 26px; }
.ans {
  appearance: none; cursor: pointer; font-family: inherit; font-weight: 750; font-size: 1.15rem; letter-spacing: 0.01em;
  padding: 22px; border-radius: 16px; border: 1.5px solid var(--border); color: var(--text); background: var(--surface-2);
  display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 74px;
  transition: transform 0.16s var(--ease-spring), border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.ans .kbd { font-size: 0.68rem; font-weight: 600; color: var(--text-faint); border: 1px solid var(--border); border-radius: 6px; padding: 2px 6px; }
.ans:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.ans:active { transform: scale(0.97); }
.ans.vero:hover { border-color: var(--green); box-shadow: 0 0 24px -6px var(--green); }
.ans.falso:hover { border-color: var(--red); box-shadow: 0 0 24px -6px var(--red); }
.ans.picked-vero { border-color: var(--green); background: var(--green-soft); }
.ans.picked-falso { border-color: var(--red); background: var(--red-soft); }
.ans.is-correct { border-color: var(--green); background: var(--green-soft); color: #d1fae5; box-shadow: 0 0 30px -8px var(--green); }
.ans.is-wrong { border-color: var(--red); background: var(--red-soft); color: #fecdd3; }
.ans:disabled { cursor: default; }

.feedback { margin-top: 18px; padding: 14px 18px; border-radius: 12px; text-align: left; font-size: 0.92rem; line-height: 1.5;
  animation: viewIn 0.35s var(--ease-out) both; }
.feedback.good { background: var(--green-soft); border: 1px solid rgba(52,211,153,0.35); }
.feedback.bad { background: var(--red-soft); border: 1px solid rgba(251,90,106,0.35); }
.feedback .tag { font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.74rem; margin-right: 8px; }
.feedback.good .tag { color: var(--green); }
.feedback.bad .tag { color: var(--red); }

.quiz-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; gap: 12px; }

/* --- Results --- */
.result-hero { text-align: center; padding: 36px 24px; }
.result-badge { width: 92px; height: 92px; border-radius: 50%; margin: 0 auto 16px; display: grid; place-items: center; font-size: 46px;
  animation: pop 0.6s var(--ease-spring) both; }
.result-badge.pass { background: var(--green-soft); box-shadow: 0 0 50px -8px var(--green); border: 2px solid var(--green); }
.result-badge.fail { background: var(--red-soft); box-shadow: 0 0 50px -8px var(--red); border: 2px solid var(--red); }
.result-hero h2 { font-size: clamp(1.7rem, 5vw, 2.4rem); letter-spacing: -0.03em; }
.result-hero h2.pass { color: var(--green); }
.result-hero h2.fail { color: var(--red); }
.result-hero p { color: var(--text-dim); margin-top: 6px; }

.result-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 22px 0; }
.result-stats .s { text-align: center; padding: 16px 10px; }
.result-stats .s .v { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; }
.result-stats .s .k { color: var(--text-faint); font-size: 0.76rem; margin-top: 3px; }

.review-list { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.review-item { padding: 14px 16px; border-radius: 12px; border-left: 3px solid var(--red); background: rgba(251,90,106,0.06); }
.review-item .qt { font-size: 0.92rem; line-height: 1.4; }
.review-item .an { font-size: 0.8rem; margin-top: 8px; display: flex; gap: 14px; flex-wrap: wrap; color: var(--text-dim); }
.review-item .an b.ok { color: var(--green); }
.review-item .an b.no { color: var(--red); }
.review-item .hint { font-size: 0.82rem; color: var(--text-dim); margin-top: 6px; font-style: italic; }
.review-item .flag { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--amber); font-weight: 700; margin-top: 6px; }

/* --- Keyframes --- */
@keyframes pop { 0% { transform: scale(0.6); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.55; } }
@keyframes shake { 10%,90% { transform: translateX(-2px); } 30%,70% { transform: translateX(4px); } 50% { transform: translateX(-6px); } }
@keyframes flashGreen { 0% { box-shadow: 0 0 0 0 rgba(52,211,153,0); } 30% { box-shadow: 0 0 60px -6px var(--green); } 100% { box-shadow: var(--shadow-card); } }
@keyframes flashRed { 0% { box-shadow: 0 0 0 0 rgba(251,90,106,0); } 30% { box-shadow: 0 0 60px -6px var(--red); } 100% { box-shadow: var(--shadow-card); } }

/* --- Responsive --- */
@media (max-width: 720px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .cta-grid { grid-template-columns: 1fr; }
  .result-stats { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 420px) {
  .answers { grid-template-columns: 1fr; }
  .brand small { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.08s !important; }
  #aurora span { animation: none; }
}