:root {
  --ink: #1c2028;
  --muted: #6d727d;
  --line: #e5e2de;
  --paper: #ffffff;
  --canvas: #f6f4f1;
  --red: #b72e3d;
  --red-dark: #8f1f2d;
  --red-soft: #f8e9eb;
  --green: #27815d;
  --green-soft: #e4f3eb;
  --amber: #a76712;
  --amber-soft: #fff3d9;
  --blue: #47668c;
  --shadow: 0 16px 40px rgba(42, 35, 31, 0.07);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { background: var(--canvas); }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--canvas);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
}

button, input, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid rgba(183, 46, 61, .24); outline-offset: 2px; }

.app-shell { display: grid; grid-template-columns: 238px 1fr; min-height: 100vh; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.user-pill { padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: #fff; font-size: .72rem; font-weight: 750; }
.user-pill:hover { color: var(--red-dark); border-color: #d7afb4; }
[hidden] { display: none !important; }

.auth-mode .sidebar, .auth-mode .topbar { display: none; }
.auth-mode .app-shell { display: grid; grid-template-columns: 1fr; place-items: center; min-height: 100vh; padding: 24px; background: radial-gradient(circle at top left, #f9e8ea, transparent 42%), var(--canvas); }
.auth-mode main { width: min(460px, 100%); }
.auth-mode #app { padding: 0; }
.auth-card { padding: clamp(28px, 6vw, 44px); border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: var(--shadow); }
.auth-card h1 { margin: 5px 0 8px; font: 500 clamp(1.8rem, 5vw, 2.35rem)/1.08 Georgia, "Times New Roman", serif; }
.auth-card > p:not(.eyebrow) { margin: 0 0 24px; color: var(--muted); }
.auth-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 30px; }
.auth-brand strong, .auth-brand small { display: block; }
.auth-brand small { color: var(--muted); font-size: .72rem; }
.auth-form { display: grid; gap: 9px; }
.auth-form .form-label { margin-top: 7px; }
.auth-form .button { margin-top: 9px; }
.auth-error { min-height: 20px; color: var(--red-dark); font-size: .8rem; }
.auth-switch { display: block; margin: 18px auto 0; }

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 28px 18px 20px;
  background: #24262d;
  color: #fff;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 0 8px 27px;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
  color: #fff;
  text-align: left;
  background: transparent;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--red);
  font-size: 1.25rem;
  font-weight: 900;
}

.brand strong { display: block; font-size: 1.08rem; letter-spacing: .04em; }
.brand small { display: block; color: #aeb2bc; font-size: .75rem; }

nav { display: grid; gap: 5px; margin-top: 25px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 11px 12px;
  border: 0;
  border-radius: 10px;
  color: #c9ccd2;
  text-align: left;
  background: transparent;
}
.nav-item span { width: 20px; color: #9ea3ad; text-align: center; }
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.active { color: #fff; background: var(--red); }
.nav-item.active span { color: #fff; }

.sidebar-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: auto;
  padding: 15px 10px 4px;
  border-top: 1px solid rgba(255,255,255,.1);
  color: #e8e8ea;
  font-size: .78rem;
}
.sidebar-note small { display: block; max-width: 150px; margin-top: 2px; color: #9ea3ad; }
.status-dot { width: 8px; height: 8px; margin-top: 5px; border-radius: 50%; background: #54bd83; box-shadow: 0 0 0 4px rgba(84,189,131,.12); }

main { min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 31px clamp(24px, 4vw, 58px) 21px;
  border-bottom: 1px solid var(--line);
  background: rgba(246,244,241,.94);
}
.topbar h1 { margin: 2px 0 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.65rem, 3vw, 2.25rem); font-weight: 500; letter-spacing: -.025em; }
.eyebrow { margin: 0; color: var(--red); font-size: .7rem; font-weight: 800; letter-spacing: .14em; }
.cycle-pill { padding: 9px 14px; border: 1px solid #d9d4cf; border-radius: 999px; color: #4a4e57; background: rgba(255,255,255,.72); font-size: .78rem; font-weight: 700; }
#app { max-width: 1300px; margin: 0 auto; padding: 28px clamp(20px, 4vw, 58px) 60px; }
.loading { padding: 80px 0; color: var(--muted); text-align: center; }

.sample-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
  padding: 13px 17px;
  border: 1px solid #ecd7b4;
  border-radius: 12px;
  color: #6f4b17;
  background: #fff9ec;
  font-size: .88rem;
}
.sample-banner strong { color: #4b330f; }
.sample-banner.bank-banner { border-color: #bedbc9; color: #23583f; background: #edf8f1; }
.sample-banner.bank-banner strong { color: #15432f; }
.text-button { padding: 3px 0; border: 0; border-bottom: 1px solid currentColor; color: inherit; background: none; font-weight: 700; }

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, .55fr);
  gap: 34px;
  align-items: center;
  min-height: 285px;
  padding: clamp(30px, 5vw, 55px);
  border-radius: 24px;
  color: white;
  background: #292c33;
  box-shadow: var(--shadow);
}
.hero::after { content: ""; position: absolute; width: 330px; height: 330px; right: -120px; top: -140px; border: 52px solid rgba(255,255,255,.035); border-radius: 50%; }
.hero-copy { position: relative; z-index: 1; }
.hero h2 { max-width: 690px; margin: 0 0 12px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2rem, 4.4vw, 3.35rem); font-weight: 500; line-height: 1.05; letter-spacing: -.035em; }
.hero p { max-width: 640px; margin: 0; color: #c9cbd0; font-size: 1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.hero-cycle { position: relative; z-index: 1; display: grid; place-items: center; }
.cycle-ring { --progress: 0%; display: grid; place-items: center; width: 160px; height: 160px; border-radius: 50%; background: conic-gradient(var(--red) var(--progress), rgba(255,255,255,.1) 0); }
.cycle-ring::before { content: ""; position: absolute; width: 128px; height: 128px; border-radius: 50%; background: #292c33; }
.cycle-ring div { position: relative; text-align: center; }
.cycle-ring strong { display: block; font-size: 2.2rem; line-height: 1; }
.cycle-ring small { color: #afb2b9; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 10px; color: #fff; background: var(--red); font-weight: 750; text-decoration: none; transition: transform .15s ease, background .15s ease; }
.button:hover { background: var(--red-dark); transform: translateY(-1px); }
.button:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.button.secondary { border-color: var(--line); color: var(--ink); background: #fff; }
.button.secondary:hover { background: #f5f3f0; }
.button.ghost { border-color: rgba(255,255,255,.25); color: #fff; background: transparent; }
.button.danger { background: #8f1f2d; }
.button.full { width: 100%; }

.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 18px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: 0 8px 28px rgba(42,35,31,.035); }
.metric { padding: 20px; }
.metric-label { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: .77rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.metric-value { margin-top: 8px; font-family: Georgia, "Times New Roman", serif; font-size: 2rem; line-height: 1.1; }
.metric-note { margin-top: 5px; color: var(--muted); font-size: .78rem; }
.accent { color: var(--red); }
.success { color: var(--green); }

.dashboard-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; margin-top: 18px; }
.panel { padding: 24px; }
.panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.panel-head h2, .panel h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 1.35rem; font-weight: 500; }
.panel-head p, .panel > p { margin: 4px 0 0; color: var(--muted); font-size: .85rem; }
.status-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.status-box { padding: 13px; border-radius: 11px; background: #f7f6f4; }
.status-box strong { display: block; font-size: 1.3rem; }
.status-box span { color: var(--muted); font-size: .75rem; }
.category-row { display: grid; grid-template-columns: minmax(110px, 1fr) 2fr 44px; align-items: center; gap: 12px; margin: 14px 0; font-size: .83rem; }
.bar { overflow: hidden; height: 7px; border-radius: 99px; background: #eeece9; }
.bar > span { display: block; height: 100%; border-radius: inherit; background: var(--red); }
.cycle-chart { display: flex; gap: 10px; align-items: end; min-height: 145px; padding-top: 18px; border-bottom: 1px solid var(--line); }
.cycle-column { flex: 1; display: grid; align-content: end; gap: 5px; height: 125px; text-align: center; color: var(--muted); font-size: .7rem; }
.cycle-column .column { min-height: 4px; border-radius: 6px 6px 0 0; background: var(--blue); }

.section-intro { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.section-intro h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 1.75rem; font-weight: 500; }
.section-intro p { max-width: 640px; margin: 5px 0 0; color: var(--muted); }
.mode-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.mode-card { display: flex; flex-direction: column; align-items: flex-start; min-height: 190px; padding: 24px; text-align: left; }
.mode-card .mode-icon { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; color: var(--red); background: var(--red-soft); font-weight: 900; }
.mode-card h3 { margin: 20px 0 6px; font-size: 1.05rem; }
.mode-card p { margin: 0 0 18px; color: var(--muted); font-size: .86rem; }
.mode-card .button { margin-top: auto; }
.select-row { display: flex; gap: 10px; width: 100%; margin-top: auto; }

.form-control { min-height: 44px; width: 100%; padding: 9px 12px; border: 1px solid #d8d4cf; border-radius: 9px; color: var(--ink); background: #fff; }
label.form-label { display: block; margin-bottom: 6px; color: #50545c; font-size: .8rem; font-weight: 700; }

.question-wrap { max-width: 900px; margin: 0 auto; }
.practice-top { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 13px; color: var(--muted); font-size: .82rem; font-weight: 700; }
.progress-track { overflow: hidden; height: 7px; margin-bottom: 18px; border-radius: 99px; background: #e7e4e0; }
.progress-track span { display: block; height: 100%; background: var(--red); transition: width .25s ease; }
.question-card { padding: clamp(23px, 4vw, 38px); }
.question-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tag { display: inline-flex; padding: 5px 9px; border-radius: 999px; color: #5b6069; background: #f0efed; font-size: .7rem; font-weight: 750; }
.question-card h2 { margin: 0 0 25px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.45rem, 3.1vw, 2.15rem); font-weight: 500; line-height: 1.24; }
.question-image {
  display: grid;
  place-items: center;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 24px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #faf9f7;
}
.question-image img { display: block; max-width: min(100%, 620px); max-height: 430px; width: auto; height: auto; object-fit: contain; }
.question-image.compact { display: block; flex: 0 0 auto; width: 76px; height: 64px; margin: 0; padding: 5px; border-radius: 9px; }
.question-image.compact img { width: 100%; height: 100%; object-fit: contain; }
.image-fallback { max-width: 520px; padding: 12px 15px; border: 1px solid #e4bfc4; border-radius: 10px; color: #7d202a; background: var(--red-soft); font-size: .82rem; font-weight: 700; text-align: center; }
.image-fallback.compact { display: grid; place-items: center; width: 76px; min-height: 52px; padding: 5px; font-size: .65rem; }
.image-fallback[hidden] { display: none; }
.answers { display: grid; gap: 11px; }
.answer {
  display: grid;
  grid-template-columns: 35px 1fr;
  gap: 12px;
  align-items: center;
  width: 100%;
  min-height: 59px;
  padding: 10px 15px;
  border: 1px solid #dcd8d3;
  border-radius: 12px;
  color: var(--ink);
  text-align: left;
  background: #fff;
}
.answer:hover:not(:disabled) { border-color: var(--red); background: #fffafa; }
.answer-letter { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 8px; color: #666b74; background: #f2f1ef; font-weight: 800; }
.answer.correct { border-color: #75b497; background: var(--green-soft); }
.answer.correct .answer-letter { color: #fff; background: var(--green); }
.answer.incorrect { border-color: #d98b94; background: var(--red-soft); }
.answer.incorrect .answer-letter { color: #fff; background: var(--red); }
.feedback { margin-top: 18px; padding: 17px 18px; border-radius: 12px; }
.feedback.correct { color: #185a3f; background: var(--green-soft); }
.feedback.incorrect { color: #7d202a; background: var(--red-soft); }
.feedback strong { display: block; margin-bottom: 4px; }
.feedback p { margin: 0; color: inherit; }
.question-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.session-stats { display: flex; gap: 15px; }

.summary-card { max-width: 820px; margin: 20px auto; padding: clamp(26px, 5vw, 44px); text-align: center; }
.score { display: grid; place-items: center; width: 138px; height: 138px; margin: 20px auto; border: 12px solid var(--green-soft); border-radius: 50%; color: var(--green); font-family: Georgia, "Times New Roman", serif; font-size: 2.3rem; }
.summary-stats { display: flex; justify-content: center; gap: 35px; margin: 18px 0 28px; }
.summary-stats strong { display: block; font-size: 1.35rem; }
.summary-stats span { color: var(--muted); font-size: .8rem; }
.review-list { display: grid; gap: 12px; margin-top: 22px; text-align: left; }
.review-item { padding: 16px; border: 1px solid var(--line); border-left: 4px solid var(--green); border-radius: 10px; background: #fff; }
.review-item.wrong { border-left-color: var(--red); }
.review-item h4 { margin: 0 0 7px; }
.review-item p { margin: 4px 0; color: var(--muted); font-size: .84rem; }

.mock-nav { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; }
.question-dots { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin: 18px 0; }
.question-dot { display: grid; place-items: center; width: 29px; height: 29px; border: 1px solid var(--line); border-radius: 7px; color: var(--muted); background: #fff; font-size: .72rem; }
.question-dot.answered { color: #fff; border-color: var(--blue); background: var(--blue); }
.question-dot.current { outline: 3px solid rgba(183,46,61,.18); }

.filters { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 10px; margin-bottom: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { padding: 11px 12px; border-bottom: 1px solid var(--line); color: var(--muted); text-align: left; font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; }
td { padding: 14px 12px; border-bottom: 1px solid #efedea; font-size: .83rem; vertical-align: middle; }
tr[data-question-id] { cursor: pointer; }
tr[data-question-id]:hover { background: #faf9f7; }
.question-cell { min-width: 320px; max-width: 560px; }
.history-question { display: flex; align-items: center; gap: 12px; }
.status { display: inline-flex; align-items: center; padding: 5px 8px; border-radius: 99px; background: #efeeec; font-size: .7rem; font-weight: 750; white-space: nowrap; }
.status.Débil { color: #8c2530; background: var(--red-soft); }
.status.Dominada { color: #176243; background: var(--green-soft); }
.status.Mejorando { color: #80530c; background: var(--amber-soft); }

.import-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
.dropzone { display: grid; place-items: center; min-height: 220px; padding: 28px; border: 2px dashed #d4cec8; border-radius: 14px; color: var(--muted); text-align: center; background: #faf9f7; }
.dropzone input { max-width: 100%; margin-top: 16px; }
.validation { margin-top: 15px; padding: 15px; border-radius: 10px; background: #f3f2f0; }
.validation.good { color: #185a3f; background: var(--green-soft); }
.validation.bad { color: #7d202a; background: var(--red-soft); }
.code-sample { overflow: auto; max-height: 390px; padding: 17px; border-radius: 12px; color: #e4e6ea; background: #292c33; font: .76rem/1.55 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre; }
.option-row { display: flex; gap: 10px; margin-top: 14px; }
.radio-card { flex: 1; padding: 12px; border: 1px solid var(--line); border-radius: 10px; }
.import-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 14px; }
.validation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 13px 0; }
.validation-grid span { padding: 9px; border-radius: 8px; background: rgba(255,255,255,.58); font-size: .75rem; }
.validation-grid b { display: block; font-size: 1.08rem; }
.warning-list { color: #74511a; }
.bank-diagnostics { margin-top: 18px; }
.diagnostic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 22px; }
.diagnostic-grid > div { padding: 15px; border-radius: 11px; background: #f5f3f0; }
.diagnostic-grid strong { display: block; font-size: 1.55rem; }
.diagnostic-grid span { color: var(--muted); font-size: .75rem; }
.diagnostic-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.diagnostic-columns h3 { margin: 0 0 8px; font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.diagnostic-row { display: flex; justify-content: space-between; gap: 15px; padding: 7px 0; border-bottom: 1px solid #efedea; font-size: .82rem; }
.source-note { color: var(--muted); font-size: .78rem; }

.settings-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.setting-row:last-child { border-bottom: 0; }
.setting-row h3 { margin: 0; font-size: .95rem; }
.setting-row p { margin: 3px 0 0; color: var(--muted); font-size: .8rem; }
.switch { position: relative; width: 48px; height: 27px; flex: 0 0 auto; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; inset: 0; border-radius: 99px; background: #cac7c3; transition: .2s; }
.slider::before { content: ""; position: absolute; width: 21px; height: 21px; left: 3px; top: 3px; border-radius: 50%; background: #fff; transition: .2s; box-shadow: 0 2px 5px rgba(0,0,0,.18); }
.switch input:checked + .slider { background: var(--green); }
.switch input:checked + .slider::before { transform: translateX(21px); }

.empty { padding: 40px 22px; color: var(--muted); text-align: center; }
.empty strong { display: block; margin-bottom: 5px; color: var(--ink); }
.danger-zone { border-color: #e4bfc4; }
.danger-zone h2 { color: var(--red-dark); }
.toast { position: fixed; z-index: 50; right: 22px; bottom: 22px; max-width: 360px; padding: 13px 16px; border-radius: 10px; color: #fff; background: #292c33; box-shadow: var(--shadow); opacity: 0; transform: translateY(10px); pointer-events: none; transition: .2s; }
.toast.show { opacity: 1; transform: translateY(0); }
.modal-backdrop { position: fixed; z-index: 60; inset: 0; display: grid; place-items: center; padding: 20px; background: rgba(25,26,30,.66); }
.modal { overflow: auto; width: min(760px, 100%); max-height: 88vh; padding: 26px; border-radius: 18px; background: #fff; box-shadow: 0 25px 80px rgba(0,0,0,.24); }
.modal-head { display: flex; justify-content: space-between; gap: 20px; }
.modal-head h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.icon-button { width: 36px; height: 36px; border: 0; border-radius: 9px; background: #efeeec; }
.timeline { margin-top: 20px; padding-left: 16px; border-left: 2px solid var(--line); }
.timeline-item { position: relative; padding: 0 0 15px 16px; font-size: .82rem; }
.timeline-item::before { content: ""; position: absolute; left: -21px; top: 5px; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); }

@media (max-width: 920px) {
  .app-shell { overflow: hidden; grid-template-columns: minmax(0, 1fr); max-width: 100vw; }
  .sidebar { position: sticky; z-index: 30; width: 100%; min-width: 0; max-width: 100vw; height: auto; padding: 10px 14px; }
  .brand { width: auto; flex: 0 0 auto; padding: 0; border: 0; }
  .brand-mark { width: 35px; height: 35px; border-radius: 9px; }
  .brand small, .sidebar-note { display: none; }
  .sidebar { flex-direction: row; align-items: center; gap: 12px; }
  nav { overflow-x: auto; display: flex; flex: 1; min-width: 0; margin: 0; padding-left: 4px; scrollbar-width: none; }
  .nav-item { width: auto; flex: 0 0 auto; padding: 9px 10px; font-size: .8rem; }
  .nav-item span { display: none; }
  .topbar { padding-top: 22px; }
  .hero { grid-template-columns: 1fr; }
  .hero-cycle { display: none; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid, .import-grid, .settings-grid { grid-template-columns: 1fr; }
  .diagnostic-columns { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .topbar { align-items: flex-end; padding: 18px 18px 15px; }
  .topbar h1 { font-size: 1.45rem; }
  .cycle-pill { padding: 7px 9px; font-size: .68rem; }
  #app { padding: 18px 14px 45px; }
  .hero { min-height: auto; padding: 28px 23px; border-radius: 18px; }
  .hero h2 { font-size: 2rem; }
  .metric-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
  .metric { padding: 15px; }
  .metric-value { font-size: 1.6rem; }
  .mode-grid { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr 1fr; }
  .filters input { grid-column: 1 / -1; }
  .question-card { padding: 21px 17px; }
  .answer { grid-template-columns: 31px 1fr; padding: 9px 10px; }
  .section-intro { align-items: flex-start; flex-direction: column; }
  .sample-banner { align-items: flex-start; flex-direction: column; }
  .summary-stats { gap: 18px; }
  .settings-grid { gap: 12px; }
  .diagnostic-grid { grid-template-columns: 1fr 1fr; }
  .validation-grid { grid-template-columns: 1fr 1fr; }
  .history-question { align-items: flex-start; }
}