@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=Sora:wght@400;500;600;700&display=swap");

:root {
  --at-bg0: oklch(14% 0.03 250);
  --at-bg1: oklch(18% 0.04 260);
  --at-text: oklch(96% 0.01 95);
  --at-muted: oklch(82% 0.02 250);
  --at-accent: oklch(78% 0.13 195);
  --at-accent-2: oklch(74% 0.14 320);
  --at-font-display: "Fraunces", Georgia, serif;
  --at-font-body: "Sora", system-ui, sans-serif;
  --at-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --at-header-h: 4.35rem;
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body.quiz-app {
  margin: 0;
  min-block-size: 100dvh;
  font-family: var(--at-font-body);
  color: var(--at-text);
  background:
    radial-gradient(900px 560px at 85% -10%, color-mix(in oklch, var(--at-accent) 28%, transparent), transparent 55%),
    radial-gradient(700px 480px at 0% 40%, color-mix(in oklch, var(--at-accent-2) 18%, transparent), transparent 50%),
    linear-gradient(165deg, var(--at-bg0), var(--at-bg1));
  background-attachment: fixed;
}

:focus-visible {
  outline: 3px solid var(--at-accent);
  outline-offset: 3px;
}

.qz-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  block-size: 3px;
  pointer-events: none;
  background: color-mix(in oklch, var(--at-text) 8%, transparent);
}
.qz-progress__bar {
  display: block;
  block-size: 100%;
  inline-size: 0%;
  background: linear-gradient(90deg, var(--at-accent), var(--at-accent-2));
  box-shadow: 0 0 12px color-mix(in oklch, var(--at-accent) 55%, transparent);
  transition: inline-size 80ms linear;
}

.qz-top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-block-size: var(--at-header-h);
  padding: 0.85rem clamp(1rem, 3vw, 2rem);
  backdrop-filter: blur(14px);
  background: color-mix(in oklch, var(--at-bg0) 55%, transparent);
  border-block-end: 1px solid transparent;
  transition:
    background 280ms var(--at-ease),
    border-color 280ms var(--at-ease),
    box-shadow 280ms var(--at-ease);
}
.qz-top.is-scrolled {
  background: color-mix(in oklch, var(--at-bg0) 88%, transparent);
  border-block-end-color: color-mix(in oklch, var(--at-text) 12%, transparent);
  box-shadow: 0 10px 30px color-mix(in oklch, black 35%, transparent);
}

.qz-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
  font: inherit;
}
.qz-brand__mark {
  display: grid;
  place-items: center;
  inline-size: 2.2rem;
  block-size: 2.2rem;
  border-radius: 0.75rem;
  background: linear-gradient(145deg, var(--at-accent), var(--at-accent-2));
  color: var(--at-bg0);
  box-shadow: 0 0 24px color-mix(in oklch, var(--at-accent) 35%, transparent);
  animation: qz-mark-pulse 3.2s var(--at-ease) infinite;
}
.qz-brand__name {
  display: block;
  font-family: var(--at-font-display);
  font-weight: 700;
  line-height: 1.1;
}
.qz-brand__tag {
  display: block;
  color: var(--at-muted);
  font-size: 0.72rem;
}

.qz-top__nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}
.qz-top__nav a,
.qz-top__nav button {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  background: transparent;
  color: var(--at-muted);
  text-decoration: none;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  transition: color 200ms var(--at-ease), background 200ms var(--at-ease), border-color 200ms var(--at-ease), transform 200ms var(--at-ease);
}
.qz-top__nav a:hover,
.qz-top__nav button:hover {
  color: var(--at-text);
  background: color-mix(in oklch, var(--at-text) 7%, transparent);
}
.qz-top__cta {
  background: linear-gradient(145deg, var(--at-accent), color-mix(in oklch, var(--at-accent-2) 50%, var(--at-accent))) !important;
  color: var(--at-bg0) !important;
  font-weight: 600;
}
.qz-top__cta:hover { transform: translateY(-1px); }

main {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
  padding-block: 0.5rem 3rem;
}

.qz-hero {
  position: relative;
  overflow: hidden;
  border-radius: 1.35rem;
  border: 1px solid color-mix(in oklch, var(--at-text) 10%, transparent);
  min-block-size: min(72vh, 38rem);
  display: grid;
  align-items: center;
  padding: clamp(1.5rem, 4vw, 3rem);
  margin-block: 1rem 2rem;
  background:
    radial-gradient(ellipse 70% 55% at 78% 28%, color-mix(in oklch, var(--at-accent) 32%, transparent), transparent 70%),
    radial-gradient(ellipse 50% 45% at 12% 78%, color-mix(in oklch, var(--at-accent-2) 22%, transparent), transparent 65%),
    linear-gradient(180deg, transparent 40%, color-mix(in oklch, var(--at-bg0) 55%, transparent)),
    color-mix(in oklch, var(--at-bg1) 80%, transparent);
}
.qz-hero__plane {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.qz-hero__grid {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image:
    linear-gradient(color-mix(in oklch, var(--at-text) 18%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in oklch, var(--at-text) 18%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 70% 30%, black, transparent 75%);
}
.qz-hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(8px);
  animation: qz-float 9s ease-in-out infinite;
}
.qz-hero__orb--1 {
  inset: 8% 12% auto auto;
  inline-size: 180px;
  block-size: 180px;
  background: color-mix(in oklch, var(--at-accent) 38%, transparent);
}
.qz-hero__orb--2 {
  inset: auto auto 10% 8%;
  inline-size: 220px;
  block-size: 220px;
  background: color-mix(in oklch, var(--at-accent-2) 32%, transparent);
  animation-delay: -2.5s;
}
.qz-hero__orb--3 {
  inset: 35% 40% auto auto;
  inline-size: 90px;
  block-size: 90px;
  background: color-mix(in oklch, white 20%, transparent);
  animation-delay: -4s;
}

.qz-hero__copy { position: relative; z-index: 1; max-inline-size: 42rem; }
.qz-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 0.75rem;
  color: var(--at-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  font-weight: 700;
}
.qz-hero__brand {
  margin: 0 0 0.55rem;
  font-family: var(--at-font-display);
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.05;
  background: linear-gradient(
    120deg,
    var(--at-text) 10%,
    color-mix(in oklch, var(--at-accent) 75%, white) 48%,
    var(--at-text) 88%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.qz-hero__brand span {
  background: linear-gradient(120deg, var(--at-accent), var(--at-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.qz-hero__slogan {
  margin: 0 0 0.75rem;
  font-family: var(--at-font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  color: var(--at-text);
}
.qz-hero__support {
  margin: 0 0 1.25rem;
  color: var(--at-muted);
  line-height: 1.55;
}

.qz-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}
.qz-cta__primary,
.qz-cta__ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 999px;
  padding: 0.75rem 1.15rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 200ms var(--at-ease), box-shadow 200ms var(--at-ease), background 200ms var(--at-ease), border-color 200ms var(--at-ease);
}
.qz-cta__primary {
  border: 0;
  color: var(--at-bg0);
  background: linear-gradient(145deg, var(--at-accent), color-mix(in oklch, var(--at-accent-2) 45%, var(--at-accent)));
  box-shadow: 0 10px 28px color-mix(in oklch, var(--at-accent) 28%, transparent);
}
.qz-cta__primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px color-mix(in oklch, var(--at-accent) 40%, transparent);
}
.qz-cta__primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.qz-cta__ghost {
  border: 1px solid color-mix(in oklch, var(--at-text) 16%, transparent);
  color: var(--at-text);
  background: color-mix(in oklch, var(--at-text) 5%, transparent);
}
.qz-cta__ghost:hover {
  border-color: color-mix(in oklch, var(--at-accent) 45%, transparent);
  background: color-mix(in oklch, var(--at-accent) 12%, transparent);
}

.qz-hero__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}
.qz-hero__stat {
  border: 1px solid color-mix(in oklch, var(--at-text) 12%, transparent);
  border-radius: 0.85rem;
  padding: 0.75rem 0.85rem;
  background: color-mix(in oklch, var(--at-bg0) 45%, transparent);
  backdrop-filter: blur(8px);
}
.qz-hero__stat strong {
  display: block;
  font-family: var(--at-font-display);
  font-size: 1.25rem;
  color: var(--at-accent);
}
.qz-hero__stat span {
  color: var(--at-muted);
  font-size: 0.78rem;
}

.qz-section { margin-block: 1.5rem 2.5rem; }
.qz-section__head h2 {
  margin: 0.35rem 0 1rem;
  font-family: var(--at-font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.qz-levels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.35rem;
}
.qz-level {
  border: 1px solid color-mix(in oklch, var(--at-text) 12%, transparent);
  border-radius: 1rem;
  padding: 1.1rem;
  background:
    linear-gradient(160deg, color-mix(in oklch, var(--at-accent) 10%, transparent), transparent 55%),
    color-mix(in oklch, var(--at-bg1) 70%, transparent);
  transition: transform 220ms var(--at-ease), border-color 220ms var(--at-ease), box-shadow 220ms var(--at-ease);
}
.qz-level:hover {
  transform: translateY(-3px);
  border-color: color-mix(in oklch, var(--at-accent) 40%, transparent);
  box-shadow: 0 16px 40px color-mix(in oklch, black 35%, transparent);
}
.qz-level h3 {
  margin: 0.55rem 0 0.25rem;
  font-family: var(--at-font-display);
}
.qz-level p {
  margin: 0 0 0.75rem;
  color: var(--at-muted);
  font-size: 0.9rem;
}
.qz-level strong {
  color: var(--at-accent);
  font-size: 1.15rem;
}

.qz-start-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: end;
}
.qz-name {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--at-muted);
}
.qz-name input {
  min-inline-size: 14rem;
  background: color-mix(in oklch, var(--at-bg0) 70%, transparent);
  border-color: color-mix(in oklch, var(--at-text) 16%, transparent);
  color: var(--at-text);
}
.qz-hint {
  margin-top: 1rem;
  color: var(--at-muted);
  font-size: 0.85rem;
}
.qz-muted { color: var(--at-muted); }

.qz-panel {
  position: relative;
  border: 1px solid color-mix(in oklch, var(--at-text) 12%, transparent);
  border-radius: 1.15rem;
  padding: clamp(1.15rem, 2.5vw, 1.85rem);
  margin-block: 1.25rem;
  background:
    linear-gradient(160deg, color-mix(in oklch, var(--at-accent) 8%, transparent), transparent 50%),
    color-mix(in oklch, var(--at-bg1) 78%, transparent);
  box-shadow: 0 18px 50px color-mix(in oklch, black 30%, transparent);
  overflow: hidden;
}
.qz-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  inline-size: 100%;
  block-size: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in oklch, var(--at-accent) 70%, transparent), transparent);
  animation: qz-sheen 4.5s linear infinite;
}

.qz-play__top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  margin-bottom: 0.85rem;
  color: var(--at-muted);
}
.qz-badge,
.qz-score {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  border: 1px solid color-mix(in oklch, var(--at-accent) 35%, transparent);
  background: color-mix(in oklch, var(--at-accent) 12%, transparent);
  color: var(--at-text);
  font-size: 0.85rem;
}
.qz-bar {
  height: 0.45rem;
  border-radius: 999px;
  background: color-mix(in oklch, var(--at-text) 10%, transparent);
  overflow: hidden;
  margin-bottom: 1.25rem;
}
.qz-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--at-accent), var(--at-accent-2));
  box-shadow: 0 0 12px color-mix(in oklch, var(--at-accent) 45%, transparent);
  transition: width 280ms var(--at-ease);
}

.qz-play h2,
.qz-result h2,
.qz-panel h2 {
  margin: 0 0 1rem;
  font-family: var(--at-font-display);
  font-size: clamp(1.25rem, 2.8vw, 1.75rem);
}

.qz-answers {
  display: grid;
  gap: 0.7rem;
  margin: 0 0 1.15rem;
}
.qz-answer {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
  text-align: start;
  border: 1px solid color-mix(in oklch, var(--at-text) 14%, transparent);
  background: color-mix(in oklch, var(--at-bg0) 45%, transparent);
  color: inherit;
  border-radius: 0.85rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  font: inherit;
  opacity: 0;
  transform: translateY(10px);
  animation: qz-answer-in 420ms var(--at-ease) forwards;
  transition: border-color 180ms var(--at-ease), background 180ms var(--at-ease), transform 180ms var(--at-ease), box-shadow 180ms var(--at-ease);
}
.qz-answer:nth-child(1) { animation-delay: 40ms; }
.qz-answer:nth-child(2) { animation-delay: 90ms; }
.qz-answer:nth-child(3) { animation-delay: 140ms; }
.qz-answer:nth-child(4) { animation-delay: 190ms; }
.qz-answer:hover,
.qz-answer:focus-visible {
  border-color: color-mix(in oklch, var(--at-accent) 50%, transparent);
  transform: translateY(-2px);
  outline: none;
}
.qz-answer.is-selected {
  border-color: var(--at-accent);
  box-shadow: inset 0 0 0 1px color-mix(in oklch, var(--at-accent) 40%, transparent), 0 0 24px color-mix(in oklch, var(--at-accent) 18%, transparent);
  background: color-mix(in oklch, var(--at-accent) 12%, transparent);
}
.qz-answer.is-correct {
  border-color: oklch(72% 0.14 155);
  background: color-mix(in oklch, oklch(72% 0.14 155) 16%, transparent);
}
.qz-answer.is-wrong {
  border-color: oklch(68% 0.16 20);
  background: color-mix(in oklch, oklch(68% 0.16 20) 14%, transparent);
}
.qz-answer__key {
  display: grid;
  place-items: center;
  inline-size: 1.7rem;
  block-size: 1.7rem;
  border-radius: 0.45rem;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--at-bg0);
  background: linear-gradient(145deg, var(--at-accent), var(--at-accent-2));
}

.qz-feedback {
  border-radius: 0.85rem;
  padding: 1rem;
  margin-bottom: 1rem;
  border: 1px solid color-mix(in oklch, var(--at-text) 14%, transparent);
  animation: qz-answer-in 320ms var(--at-ease);
}
.qz-feedback.is-ok {
  border-color: oklch(72% 0.14 155);
  background: color-mix(in oklch, oklch(72% 0.14 155) 12%, transparent);
}
.qz-feedback.is-bad {
  border-color: oklch(68% 0.16 20);
  background: color-mix(in oklch, oklch(68% 0.16 20) 12%, transparent);
}
.qz-feedback p { margin: 0.35rem 0 0; color: var(--at-muted); }

.qz-play__actions,
.qz-result__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.qz-streak {
  min-height: 1.4rem;
  margin: 0.85rem 0 0;
  color: var(--at-accent);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.qz-streak.is-hot {
  animation: qz-mark-pulse 1.1s var(--at-ease) infinite;
  text-shadow: 0 0 18px color-mix(in oklch, var(--at-accent) 55%, transparent);
}

.qz-result__score {
  font-family: var(--at-font-display);
  font-size: clamp(2.2rem, 7vw, 3.8rem);
  font-weight: 700;
  margin: 0.25rem 0 1rem;
  background: linear-gradient(135deg, var(--at-accent), var(--at-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.qz-result__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.qz-result__grid div {
  border: 1px solid color-mix(in oklch, var(--at-text) 12%, transparent);
  border-radius: 0.75rem;
  padding: 0.85rem;
  background: color-mix(in oklch, var(--at-bg0) 40%, transparent);
}

.qz-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.85rem 0 1.1rem;
}
.qz-badges span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  border: 1px solid color-mix(in oklch, var(--at-accent) 35%, transparent);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.8rem;
  color: var(--at-accent);
  background: color-mix(in oklch, var(--at-accent) 10%, transparent);
}

.qz-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}
.qz-filters label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--at-muted);
}
.qz-filters select {
  background: color-mix(in oklch, var(--at-bg0) 70%, transparent);
  color: var(--at-text);
  border-color: color-mix(in oklch, var(--at-text) 16%, transparent);
}

.velin-table-wrap {
  border-radius: 0.85rem;
  overflow: auto;
  border: 1px solid color-mix(in oklch, var(--at-text) 10%, transparent);
}
.velin-table {
  width: 100%;
  border-collapse: collapse;
}
.velin-table th,
.velin-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid color-mix(in oklch, var(--at-text) 8%, transparent);
}
.velin-table th {
  text-align: start;
  color: var(--at-muted);
  font-weight: 600;
}

.qz-footer {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding-block: 1.25rem 2.5rem;
  color: var(--at-muted);
  font-size: 0.85rem;
}
.qz-footer p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
}
.qz-footer a { color: var(--at-accent); }

.qz-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 700ms var(--at-ease),
    transform 700ms var(--at-ease);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.qz-reveal[data-qz-anim="scale"] {
  transform: translateY(12px) scale(0.96);
}
.qz-reveal.is-inview {
  opacity: 1;
  transform: none;
}

@keyframes qz-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
@keyframes qz-sheen {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
@keyframes qz-mark-pulse {
  0%, 100% { box-shadow: 0 0 18px color-mix(in oklch, var(--at-accent) 30%, transparent); }
  50% { box-shadow: 0 0 28px color-mix(in oklch, var(--at-accent) 55%, transparent); }
}
@keyframes qz-answer-in {
  to { opacity: 1; transform: none; }
}

@media (max-width: 860px) {
  .qz-hero__stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qz-levels { grid-template-columns: 1fr; }
  .qz-top { flex-direction: column; align-items: flex-start; }
  .qz-top__nav a span,
  .qz-top__nav button span { display: none; }
  .qz-top__cta span { display: inline !important; }
}

@media (prefers-reduced-motion: reduce) {
  .qz-hero__orb,
  .qz-brand__mark,
  .qz-panel::before,
  .qz-streak.is-hot { animation: none; }
  .qz-reveal,
  .qz-answer {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
  .qz-cta__primary:hover:not(:disabled),
  .qz-level:hover,
  .qz-answer:hover { transform: none; }
}