:root {
  --bg-top: #f5f7fb;
  --bg-bottom: #eef4ff;
  --surface: #ffffff;
  --surface-2: #f8fbff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #c7d2fe;
  --primary: #0f766e;
  --primary-2: #0ea5a0;
  --accent: #b45309;
  --accent-2: #f59e0b;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top right, #dbeafe 0%, transparent 40%),
    linear-gradient(160deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  overflow-x: hidden;
}

body[dir="rtl"] {
  font-family: "Cairo", sans-serif;
}

.orb {
  position: fixed;
  z-index: -1;
  filter: blur(44px);
  opacity: 0.5;
}

.orb-1 {
  width: 320px;
  height: 320px;
  border-radius: 42% 58% 63% 37% / 41% 54% 46% 59%;
  background: linear-gradient(135deg, #fb7185, #f59e0b);
  top: -80px;
  left: -90px;
}

.orb-2 {
  width: 280px;
  height: 280px;
  border-radius: 53% 47% 40% 60% / 46% 55% 45% 54%;
  background: linear-gradient(135deg, #14b8a6, #22d3ee);
  bottom: -80px;
  right: -70px;
}

.container {
  width: min(100%, 1080px);
  margin: 0 auto;
  padding: 24px 18px 30px;
}

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

.brand {
  text-decoration: none;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.01em;
}

.langs {
  display: inline-flex;
  gap: 6px;
  flex-wrap: wrap;
}

.lang-link {
  text-decoration: none;
  color: #1e293b;
  border: 1px solid #cbd5e1;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.84rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.72);
}

.lang-link.active {
  border-color: #0f766e;
  color: #0f766e;
}

.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 48%, #0f766e 100%);
  border-radius: 24px;
  color: #f8fafc;
  padding: clamp(24px, 4vw, 42px);
  box-shadow: var(--shadow);
  animation: rise 0.5s ease-out both;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
  font-weight: 700;
  opacity: 0.9;
}

h1 {
  margin: 10px 0 0;
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  line-height: 1.08;
}

.subtitle {
  max-width: 760px;
  margin: 12px 0 0;
  color: #dbeafe;
  font-size: clamp(1rem, 2.3vw, 1.2rem);
}

.hero-links {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.chip-link {
  text-decoration: none;
  background: rgba(248, 250, 252, 0.13);
  color: #f8fafc;
  border: 1px solid rgba(248, 250, 252, 0.27);
  padding: 9px 13px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
}

.content-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid #dbeafe;
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  animation: rise 0.65s ease-out both;
}

.card h2 {
  margin: 0;
  font-size: 1.36rem;
}

.card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.label {
  display: block;
  margin-top: 14px;
  font-weight: 700;
  font-size: 0.93rem;
}

input[type="number"],
select {
  margin-top: 7px;
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 11px 12px;
  font: inherit;
  background: #ffffff;
}

.eq-grid {
  margin-top: 8px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

button {
  margin-top: 14px;
  border: 0;
  border-radius: 11px;
  padding: 11px 14px;
  font: inherit;
  font-weight: 800;
  color: #f8fafc;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  cursor: pointer;
}

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

.test-link {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  text-decoration: none;
  border-radius: 11px;
  padding: 10px 14px;
  font-weight: 800;
  color: #f8fafc;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
}

.test-link:hover {
  transform: translateY(-1px);
}

.result {
  margin-top: 12px;
  border: 1px solid #c7f9ee;
  background: linear-gradient(160deg, #f0fdfa 0%, #ecfeff 100%);
  border-radius: 12px;
  padding: 11px 12px;
}

.result strong {
  font-size: 1.12rem;
}

.quiz-progress {
  display: grid;
  gap: 6px;
  margin-top: 12px;
  margin-bottom: 8px;
}

.quiz-progress span {
  font-size: 0.86rem;
  color: #475569;
  font-weight: 700;
}

.quiz-progress-track {
  height: 8px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #0f766e 0%, #14b8a6 100%);
}

.quiz-chip {
  display: inline-block;
  margin-top: 8px;
  border-radius: 999px;
  border: 1px solid #bfdbfe;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 11px;
}

.quiz-question {
  margin: 10px 0 0;
  font-size: 1.08rem;
  line-height: 1.3;
}

.quiz-image {
  margin-top: 10px;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  padding: 8px;
  background: #f8fafc;
}

.quiz-image svg {
  width: 100%;
  height: auto;
  display: block;
}

.quiz-options {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.quiz-option {
  width: 100%;
  text-align: left;
  margin: 0;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #ffffff;
  color: #0f172a;
  font-weight: 600;
  padding: 10px 12px;
}

body[dir="rtl"] .quiz-option {
  text-align: right;
}

.quiz-option.is-active {
  border-color: #0f766e;
  background: #ecfdf5;
  color: #065f46;
}

.quiz-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.quiz-nav {
  margin-top: 0;
  padding: 10px 14px;
}

.quiz-nav.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.quiz-error.is-hidden {
  display: none;
}

.quiz-breakdown {
  margin: 8px 0 0;
  color: #334155;
  padding-left: 20px;
}

.quiz-reset {
  margin-top: 10px;
}

.quiz-setup {
  margin-top: 10px;
}

.quiz-setup-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.quiz-clinical {
  margin-top: 12px;
  border: 1px solid #dbeafe;
  background: #f8fbff;
  border-radius: 12px;
  padding: 12px;
}

.quiz-clinical h3 {
  margin: 0;
  font-size: 1.02rem;
}

.quiz-clinical p {
  margin: 8px 0 0;
  color: #334155;
}

.quiz-links {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.note {
  margin-top: 10px;
  font-size: 0.83rem;
  color: #64748b;
}

.ad-box {
  margin-top: 18px;
  padding: 14px;
  border-radius: 14px;
  border: 1px dashed #94a3b8;
  background: var(--surface-2);
}

.ad-title {
  margin: 0 0 8px;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #475569;
  font-weight: 800;
}

.explain {
  margin-top: 16px;
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 18px;
  padding: 18px;
}

.post-test-module.is-hidden {
  display: none;
}

.explain h3 {
  margin: 0;
  font-size: 1.2rem;
}

.explain ul {
  margin: 10px 0 0;
  color: #334155;
}

.footer {
  margin-top: 18px;
  color: #64748b;
  font-size: 0.9rem;
}

body[dir="rtl"] .topbar {
  flex-direction: row-reverse;
}

body[dir="rtl"] .hero,
body[dir="rtl"] .card,
body[dir="rtl"] .explain {
  text-align: right;
}

@media (max-width: 920px) {
  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .eq-grid {
    grid-template-columns: 1fr;
  }

  .quiz-setup-grid {
    grid-template-columns: 1fr;
  }

  .hero-links {
    flex-direction: column;
    align-items: flex-start;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}