:root {
  --color-red: #ed1c27;
  --color-red-dark: #bf0615;
  --color-red-soft: #fff1f2;
  --color-red-quiet: #fef3f4;
  --color-ink: #111827;
  --color-muted: #667085;
  --color-soft: #f7f7f4;
  --color-card: #ffffff;
  --color-border: #e5e7eb;
  --color-border-strong: #d5dae3;
  --color-green: #22c55e;
  --color-green-soft: #ecfdf3;
  --color-yellow: #f6b500;
  --color-yellow-soft: #fff8db;
  --color-pending: #f1f5f9;
  --shadow-soft: 0 18px 44px rgba(15, 23, 42, 0.07);
  --shadow-card: 0 14px 34px rgba(15, 23, 42, 0.055);
  --radius-panel: 20px;
  --radius-card: 12px;
  --radius-control: 10px;
  --font-sans: "Inter", Arial, Helvetica, sans-serif;
  --transition: 180ms ease;
}

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

html {
  min-height: 100%;
  background: var(--color-soft);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--color-ink);
  background:
    radial-gradient(circle at 18% 0%, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0) 32%),
    linear-gradient(135deg, rgba(237, 28, 39, 0.035), rgba(255, 255, 255, 0) 28%),
    var(--color-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

svg {
  display: block;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 20;
  transform: translateY(-160%);
  border-radius: 999px;
  background: var(--color-ink);
  color: white;
  padding: 10px 16px;
  text-decoration: none;
  transition: transform var(--transition);
}

.skip-link:focus {
  transform: translateY(0);
}

.app-shell {
  width: min(1720px, 100%);
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(14px, 1.8vw, 32px);
}

.login-screen {
  display: grid;
  min-height: calc(100svh - clamp(28px, 3.6vw, 64px));
  align-items: center;
  justify-items: center;
}

.login-card,
.exam-screen {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-card);
  box-shadow: var(--shadow-soft);
}

.login-card {
  display: grid;
  max-width: 1588px;
  min-height: min(835px, calc(100svh - clamp(28px, 3.6vw, 64px)));
  overflow: visible;
  padding: clamp(28px, 3vw, 52px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  width: fit-content;
  color: #6f7786;
  font-size: clamp(1.12rem, 1.25vw, 1.6rem);
  line-height: 1;
  white-space: nowrap;
}

.brand strong {
  color: var(--color-ink);
  font-weight: 900;
}

.brand-logo {
  width: clamp(48px, 3.6vw, 58px);
  height: clamp(48px, 3.6vw, 58px);
  flex: 0 0 auto;
  border-radius: 14px;
  object-fit: contain;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.12);
}

.login-grid {
  display: grid;
  grid-template-columns: minmax(500px, 0.86fr) minmax(620px, 1.06fr);
  align-items: stretch;
  gap: clamp(34px, 3.6vw, 64px);
  margin-top: 0;
  min-height: 0;
}

.login-panel {
  display: grid;
  align-content: start;
  gap: clamp(22px, 2.8vw, 42px);
  min-width: 0;
  padding-right: clamp(24px, 3.1vw, 54px);
  border-right: 1px solid var(--color-border);
}

.eyebrow {
  position: relative;
  margin: 0 0 22px;
  color: var(--color-red);
  font-size: 0.86rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -12px;
  width: 76px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-red), rgba(237, 28, 39, 0.08));
}

.login-copy h1,
.exam-card h1,
.progress-sidebar h2,
.modal-card h2 {
  margin: 0;
  color: var(--color-ink);
  font-weight: 850;
  letter-spacing: 0;
}

.login-copy h1 {
  font-size: clamp(3.25rem, 4.25vw, 4.75rem);
  line-height: 0.96;
}

.login-copy h1 span {
  display: block;
}

.login-copy h1 .title-main {
  color: var(--color-ink);
}

.login-copy h1 .title-accent {
  color: #f15a24;
}

.login-copy p:not(.eyebrow) {
  max-width: 590px;
  margin: 16px 0 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 1.3vw, 1.22rem);
}

.academy-illustration {
  display: flex;
  align-self: start;
  align-items: flex-start;
  justify-content: center;
  margin: 0;
  overflow: visible;
  min-width: 0;
  min-height: 0;
  width: min(100%, calc(min(86svh, 840px) * 1190 / 1322));
  aspect-ratio: 1190 / 1322;
  justify-self: center;
}

.academy-illustration img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
  object-position: center;
}

.login-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 570px;
  margin: 0;
}

.login-form .button,
.login-form .guest-button {
  width: 100%;
}

.field {
  display: grid;
  gap: 9px;
}

.field label {
  color: var(--color-ink);
  font-size: 0.88rem;
  font-weight: 700;
}

.input-wrap {
  position: relative;
}

.input-wrap svg {
  position: absolute;
  left: 16px;
  top: 50%;
  width: 20px;
  height: 20px;
  transform: translateY(-50%);
  color: #8a94a6;
  pointer-events: none;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: #ffffff;
  color: var(--color-ink);
  padding: 0 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

input {
  padding-left: 48px;
}

input::placeholder {
  color: #98a2b3;
}

input:focus-visible,
select:focus-visible,
button:focus-visible,
.question-option:focus-within {
  border-color: var(--color-red);
  box-shadow: 0 0 0 4px rgba(237, 28, 39, 0.14);
}

.field-error {
  min-height: 18px;
  margin: 0;
  color: var(--color-red-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

.button,
.guest-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  padding: 0 20px;
  font-weight: 800;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.button svg {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
}

.button:hover,
.guest-button:hover {
  transform: translateY(-1px);
}

.button-primary {
  justify-content: space-between;
  background: linear-gradient(180deg, #ff1f2d 0%, var(--color-red) 58%, #d70b18 100%);
  color: white;
  box-shadow: 0 12px 24px rgba(237, 28, 39, 0.22);
}

.button-secondary {
  background: white;
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}

.guest-button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  justify-content: initial;
  min-height: 48px;
  border-color: var(--color-border);
  background: white;
  color: var(--color-ink);
}

.guest-button svg {
  width: 22px;
  height: 22px;
  color: var(--color-red);
}

.guest-button span {
  display: grid;
  gap: 1px;
  text-align: left;
}

.guest-button small {
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

@media (max-height: 820px) and (min-width: 761px) {
  .login-screen {
    align-items: center;
  }

  .login-card {
    min-height: auto;
    padding: clamp(22px, 2.1vw, 32px);
  }

  .brand {
    font-size: 1.05rem;
  }

  .brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
  }

  .login-grid {
    grid-template-columns: minmax(500px, 0.86fr) minmax(560px, 1fr);
    gap: clamp(28px, 3.2vw, 44px);
    margin-top: 0;
  }

  .login-panel {
    gap: clamp(20px, 2.4vw, 30px);
  }

  .eyebrow {
    margin-bottom: 18px;
    font-size: 0.72rem;
  }

  .login-copy h1 {
    font-size: clamp(3.15rem, 4.6vw, 4.25rem);
  }

  .login-copy p:not(.eyebrow) {
    margin-top: 12px;
    font-size: 1rem;
  }

  .academy-illustration img {
    max-height: none;
  }

  .login-form {
    gap: 16px;
  }

  .field {
    gap: 6px;
  }

  .field label {
    font-size: 0.82rem;
  }

  input,
  select,
  .button,
  .guest-button {
    min-height: 44px;
  }

  .field-error {
    min-height: 14px;
  }
}

.exam-screen {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 251, 252, 0.98)),
    white;
}

.exam-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 34px 16px;
  background: rgba(255, 255, 255, 0.92);
}

.brand-compact .brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(17, 24, 39, 0.1);
}

.header-user {
  display: flex;
  align-items: center;
  gap: 28px;
}

.timer,
.profile {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.timer {
  color: var(--color-red);
  border: 1px solid rgba(237, 28, 39, 0.12);
  border-radius: 14px;
  background: var(--color-red-quiet);
  padding: 8px 12px;
}

.timer svg {
  width: 34px;
  height: 34px;
}

.timer span {
  display: grid;
  line-height: 1.1;
}

.timer small {
  color: var(--color-ink);
  font-weight: 500;
}

.timer strong {
  color: var(--color-red);
  font-size: clamp(1.45rem, 1.8vw, 2rem);
}

.profile {
  color: var(--color-ink);
  font-weight: 750;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: white;
  padding: 6px 12px 6px 6px;
}

.avatar {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #f3f4f6;
  color: #4b5563;
  font-size: 0.95rem;
  font-weight: 750;
}

.red-rule {
  height: 3px;
  background: linear-gradient(90deg, var(--color-red), #ff5a64 52%, var(--color-red));
}

.exam-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.45fr);
  gap: 20px;
  padding: 26px 34px 24px;
}

.exam-card,
.progress-sidebar,
.modal-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-card);
}

.exam-card {
  padding: clamp(22px, 2vw, 30px);
  position: relative;
  overflow: hidden;
}

.exam-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--color-red), rgba(237, 28, 39, 0.22));
}

.exam-card-header {
  display: grid;
  gap: 16px;
}

.exam-card h1 {
  font-size: clamp(1.45rem, 1.7vw, 2.05rem);
}

.group-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(237, 28, 39, 0.12);
  background: var(--color-red-soft);
  color: var(--color-ink);
  padding: 12px 16px;
  font-size: 0.92rem;
}

.group-badge svg {
  width: 22px;
  height: 22px;
  color: var(--color-red);
  flex: 0 0 auto;
}

.group-badge strong {
  color: var(--color-red);
}

.question-meta {
  display: grid;
  grid-template-columns: auto minmax(160px, 1fr);
  align-items: center;
  gap: 24px;
  margin-top: 24px;
}

.question-meta p {
  margin: 0;
  font-weight: 800;
}

#question-progress strong {
  color: var(--color-red);
}

.progress-track {
  position: relative;
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: #e7eaf0;
}

.progress-fill {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-red), #ff4b57);
  transition: width 220ms ease;
}

.progress-fill-green {
  background: linear-gradient(90deg, #16a34a, var(--color-green));
}

.question-form {
  margin-top: 22px;
}

fieldset {
  min-width: 0;
  margin: 0;
  border: 0;
  padding: 0;
}

legend {
  display: block;
  width: 100%;
  margin: 0 0 18px;
  color: var(--color-ink);
  font-size: clamp(1.1rem, 1.35vw, 1.48rem);
  font-weight: 800;
  line-height: 1.38;
}

.options-list {
  display: grid;
  gap: 12px;
}

.question-option {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  min-height: 64px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: #ffffff;
  padding: 14px 18px;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.question-option:hover {
  border-color: #b9c1ce;
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.055);
}

.question-option input {
  width: 24px;
  min-height: 24px;
  height: 24px;
  margin: 2px 0 0;
  accent-color: var(--color-red);
}

.question-option span {
  color: #1d2939;
  font-weight: 500;
}

.question-option.is-selected {
  border-color: rgba(237, 28, 39, 0.45);
  background: #fff8f8;
  box-shadow: inset 4px 0 0 var(--color-red);
}

.exam-actions {
  display: grid;
  grid-template-columns: auto auto auto;
  justify-content: space-between;
  gap: 14px;
  margin-top: 24px;
}

.exam-actions .button svg {
  width: 22px;
  height: 22px;
}

.progress-sidebar {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 24px;
  position: sticky;
  top: 18px;
  align-self: start;
}

.progress-sidebar h2 {
  font-size: 1.2rem;
}

.overall-progress {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
}

.overall-progress strong {
  font-size: 1.12rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.stat-card {
  display: grid;
  justify-items: center;
  gap: 4px;
  min-width: 0;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 6px;
  text-align: center;
}

.stat-answered {
  border-color: rgba(34, 197, 94, 0.16);
  background: var(--color-green-soft);
}

.stat-pending {
  border-color: rgba(148, 163, 184, 0.2);
  background: #f8fafc;
}

.stat-marked {
  border-color: rgba(246, 181, 0, 0.22);
  background: var(--color-yellow-soft);
}

.stat-card strong {
  font-size: 1.02rem;
}

.stat-card span:last-child {
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.stat-icon {
  display: inline-grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  font-weight: 900;
  line-height: 1;
}

.stat-answered .stat-icon {
  background: var(--color-green);
  color: white;
}

.stat-pending .stat-icon {
  background: #eef2f7;
  color: #7b8495;
}

.stat-marked .stat-icon {
  color: var(--color-yellow);
}

.question-navigation {
  margin-top: 20px;
}

.navigation-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.navigation-title h3 {
  margin: 0;
  font-size: 0.96rem;
}

.navigation-title span {
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.question-grid {
  display: grid;
  grid-template-columns: repeat(5, 44px);
  justify-content: space-between;
  gap: 8px;
}

.question-jump {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--color-pending);
  color: #596273;
  font-weight: 800;
  line-height: 1;
  transition: transform var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
}

.question-jump:hover {
  transform: translateY(-1px);
  border-color: #cbd5e1;
}

.question-jump.is-answered {
  border-color: rgba(34, 197, 94, 0.45);
  background: var(--color-green-soft);
  color: #067647;
}

.question-jump.is-current {
  border-color: var(--color-red);
  background: var(--color-red);
  color: white;
  box-shadow: 0 10px 18px rgba(237, 28, 39, 0.18);
}

.question-jump.is-marked {
  border-color: var(--color-yellow);
  background: var(--color-yellow-soft);
  color: #7a5800;
}

.question-jump.is-current.is-marked {
  background: var(--color-red);
  color: white;
}

.question-jump .star {
  position: absolute;
  right: 3px;
  top: 2px;
  color: var(--color-yellow);
  font-size: 0.65rem;
}

.finish-button {
  width: 100%;
  margin-top: auto;
}

.finish-button svg {
  width: 22px;
  height: 22px;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 18px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.48);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  padding: 30px;
}

.modal-close {
  position: absolute;
  right: 16px;
  top: 14px;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: #f3f4f6;
  color: var(--color-ink);
  font-size: 1.1rem;
}

.result-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  border-radius: 999px;
  background: var(--color-green-soft);
  color: #067647;
  padding: 7px 12px;
  font-weight: 800;
}

.result-kicker.needs-support {
  background: var(--color-yellow-soft);
  color: #7a5800;
}

.modal-card h2 {
  font-size: 1.7rem;
}

.modal-card p {
  color: var(--color-muted);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 22px 0;
}

.result-grid div {
  display: grid;
  gap: 4px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 14px;
}

.result-grid span {
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.result-grid strong {
  font-size: 1.35rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

@media (max-width: 1120px) {
  .login-screen {
    align-items: start;
  }

  .login-grid,
  .exam-layout {
    grid-template-columns: 1fr;
  }

  .login-card {
    min-height: auto;
  }

  .login-panel {
    padding-right: 0;
    border-right: 0;
  }

  .academy-illustration img {
    max-height: 560px;
  }

  .finish-button {
    margin-top: 28px;
  }
}

@media (min-width: 901px) and (max-width: 1120px) {
  .login-card {
    max-width: 980px;
  }

  .login-grid {
    grid-template-columns: minmax(340px, 0.82fr) minmax(430px, 1fr);
    gap: clamp(24px, 3vw, 34px);
  }

  .login-panel {
    padding-right: clamp(20px, 3vw, 32px);
    border-right: 1px solid var(--color-border);
  }

  .login-copy h1 {
    font-size: clamp(2.85rem, 5.6vw, 3.8rem);
  }

  .academy-illustration img {
    max-height: min(68svh, 600px);
  }
}

@media (max-width: 900px) {
  .login-card {
    max-width: 760px;
  }

  .login-grid {
    gap: 22px;
  }

  .login-panel {
    gap: 24px;
  }

  .login-copy h1 {
    font-size: clamp(2.75rem, 7vw, 3.85rem);
    line-height: 0.98;
  }

  .login-copy p:not(.eyebrow) {
    max-width: 620px;
    font-size: 1.08rem;
  }

  .academy-illustration {
    display: none;
  }

  .login-form {
    max-width: 100%;
    gap: 18px;
  }
}

@media (max-width: 760px) {
  .app-shell {
    padding: 10px;
  }

  .login-screen {
    min-height: calc(100vh - 20px);
  }

  .login-card,
  .exam-screen {
    border-radius: 16px;
  }

  .login-card,
  .exam-card,
  .progress-sidebar,
  .modal-card {
    padding: 20px;
  }

  .login-grid {
    gap: 14px;
  }

  .brand {
    gap: 10px;
    font-size: 1.05rem;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 10px;
  }

  .login-copy h1 {
    font-size: clamp(2.35rem, 10vw, 3.3rem);
  }

  .login-copy p:not(.eyebrow) {
    font-size: 1rem;
  }

  .exam-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px;
  }

  .header-user {
    width: 100%;
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .exam-layout {
    padding: 18px;
  }

  .progress-sidebar {
    position: static;
  }

  .question-meta,
  .exam-actions {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .question-grid {
    grid-template-columns: repeat(5, minmax(40px, 1fr));
  }

  .question-jump {
    width: auto;
    height: auto;
    aspect-ratio: 1;
  }

  .result-grid,
  .modal-actions {
    display: grid;
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}