:root {
  --bg: #f4f6fb;
  --paper: #ffffff;
  --ink: #111827;
  --muted: #576074;
  --line: #dce2ee;
  --primary: #0d4ecf;
  --primary-dark: #07358f;
  --secondary: #0ea5a4;
  --shadow: 0 18px 40px rgba(16, 33, 72, 0.1);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: 'Manrope', sans-serif;
  background: radial-gradient(circle at 5% -5%, #dfe7ff 0, transparent 32%),
    radial-gradient(circle at 95% 5%, #d7faf6 0, transparent 34%), var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.top-ribbon {
  background: #06193e;
  color: #dbe8ff;
  text-align: center;
  font-size: 0.82rem;
  padding: 0.5rem 1rem;
  letter-spacing: 0.02em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 15;
  backdrop-filter: blur(10px);
  background: rgba(244, 246, 251, 0.88);
  border-bottom: 1px solid rgba(220, 226, 238, 0.7);
}

.site-header.slim {
  position: relative;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  font-family: 'Source Serif 4', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #0b2e74;
}

.brand span {
  color: #0ea5a4;
  margin-left: 0.2rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.main-nav a {
  font-weight: 600;
  color: #23314f;
  font-size: 0.95rem;
}

.main-nav .nav-cta {
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 999px;
  padding: 0.65rem 1rem;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-weight: 700;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 4rem 0 3rem;
}

.hero-gradient {
  position: absolute;
  inset: -20% -25% auto auto;
  width: 60%;
  height: 65%;
  background: radial-gradient(circle, rgba(13, 78, 207, 0.18), transparent 68%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.8rem;
  align-items: start;
}

.kicker {
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 0.9rem;
  max-width: 17ch;
}

.hero p {
  color: var(--muted);
  max-width: 56ch;
}

.search-row {
  margin-top: 1.5rem;
  display: flex;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.32rem;
  max-width: 620px;
}

.search-row input {
  flex: 1;
  border: none;
  outline: none;
  font: inherit;
  padding: 0.7rem 0.9rem;
  border-radius: 999px;
}

.search-row button {
  border: none;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  font-weight: 700;
  cursor: pointer;
}

.hero-tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.hero-tags span {
  background: rgba(13, 78, 207, 0.1);
  color: #0b3f9a;
  font-size: 0.82rem;
  padding: 0.36rem 0.66rem;
  border-radius: 999px;
  font-weight: 700;
}

.hero-panel {
  display: grid;
  gap: 1rem;
}

.panel-card,
.panel-stats,
.course-card,
.journey-step,
.dashboard-card,
.physician-cta,
.course-side .exam-box,
.course-side .panel-card {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
}

.panel-card {
  padding: 1.4rem;
}

.panel-card h3 {
  margin-bottom: 0.75rem;
}

.panel-card ul {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  color: var(--muted);
}

.panel-card a {
  color: var(--primary);
  font-weight: 800;
}

.panel-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding: 1rem;
}

.panel-stats strong {
  display: block;
  font-size: 1.3rem;
}

.panel-stats span {
  color: var(--muted);
  font-size: 0.82rem;
}

.partners {
  margin-top: 1.3rem;
}

.partners p {
  font-weight: 700;
  margin-bottom: 0.7rem;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}

.partner-grid span {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.9rem;
  text-align: center;
  font-size: 0.85rem;
  color: #3c4a66;
}

.programs {
  padding: 4rem 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-head h2,
.journey h2,
.physician-cta h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.2rem);
}

.section-head a {
  color: var(--primary);
  font-weight: 700;
}

.filters {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.filter-chip {
  border: 1px solid var(--line);
  background: #fff;
  color: #2d3a56;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.filter-chip.active {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(13, 78, 207, 0.08);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.course-card {
  padding: 1.2rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 45px rgba(11, 46, 116, 0.15);
}

.card-label {
  display: inline-flex;
  margin: 0 0 0.55rem;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  background: rgba(14, 165, 164, 0.12);
  color: #086f6e;
  font-size: 0.76rem;
  font-weight: 800;
}

.course-card h3 {
  font-size: 1.16rem;
  margin-bottom: 0.4rem;
}

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

.card-meta {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.card-meta span {
  font-size: 0.78rem;
  border-radius: 8px;
  padding: 0.25rem 0.5rem;
  background: #eff3fb;
  color: #27406f;
  font-weight: 700;
}

.journey {
  padding: 3.5rem 0;
  background: linear-gradient(180deg, rgba(7, 53, 143, 0.04), rgba(14, 165, 164, 0.05));
  border-top: 1px solid #e8edf7;
  border-bottom: 1px solid #e8edf7;
}

.journey-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr 1fr;
  gap: 0.9rem;
}

.journey-step {
  padding: 1.1rem;
}

.journey-step p {
  color: var(--muted);
  margin: 0.6rem 0 0;
}

.physician-cta {
  margin: 3.5rem auto;
  padding: 1.6rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.physician-cta p {
  color: var(--muted);
  margin: 0.7rem 0 0;
}

.physician-cta a {
  white-space: nowrap;
  background: var(--secondary);
  color: #032927;
  font-weight: 800;
  padding: 0.7rem 1rem;
  border-radius: 999px;
}

.site-footer {
  margin-top: 3rem;
  background: #06193e;
  color: #d9e8ff;
  padding: 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 1rem;
}

.site-footer h4 {
  margin-bottom: 0.5rem;
}

.site-footer a {
  display: block;
  color: #c4d6f8;
  margin-bottom: 0.35rem;
}

.course-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1rem;
  padding: 2.3rem 0;
}

.course-main {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
}

.course-main h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-bottom: 0.8rem;
}

.course-subline {
  font-weight: 700;
  color: #30456f;
}

.curriculum {
  margin-top: 1.4rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.curriculum article {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.9rem;
  margin-bottom: 0.75rem;
}

.curriculum article p {
  margin: 0.4rem 0 0;
  color: var(--muted);
}

.course-side {
  display: grid;
  gap: 0.8rem;
  align-content: start;
}

.course-side .exam-box {
  padding: 1rem;
}

.course-side .exam-box p {
  color: var(--muted);
  margin: 0.5rem 0 0;
}

.dashboard {
  padding: 2.2rem 0;
}

.dashboard-head p:last-child {
  color: var(--muted);
}

.dashboard-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}

.dashboard-card {
  padding: 1.1rem;
}

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

.dashboard-card a {
  color: var(--primary);
  font-weight: 700;
}

.dashboard-card.highlight {
  border-color: rgba(14, 165, 164, 0.6);
  background: linear-gradient(180deg, #f1fffd, #ffffff);
}

.language-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
}

.language-switch button {
  border: none;
  background: transparent;
  color: #40506f;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}

.language-switch button.active {
  background: var(--primary);
  color: #fff;
}

.auth-page {
  padding: 2.2rem 0;
}

.auth-shell {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.auth-card-box {
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
}

.auth-card-box h1,
.auth-card-box h2 {
  margin-bottom: 0.45rem;
}

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

.stack-form {
  display: grid;
  gap: 0.7rem;
}

.stack-form label {
  display: grid;
  gap: 0.35rem;
}

.stack-form input,
.stack-form select,
.stack-form textarea {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.62rem 0.72rem;
  font: inherit;
  background: #fff;
}

.stack-form button,
#catalog-load,
.enroll-btn,
#exam-start,
#exam-submit {
  border: none;
  border-radius: 10px;
  padding: 0.66rem 0.8rem;
  font-weight: 800;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
}

.form-feedback {
  min-height: 1.2rem;
  margin-top: 0.55rem;
  font-size: 0.9rem;
}

.form-feedback.ok {
  color: #087443;
}

.form-feedback.error {
  color: #bf1c1c;
}

.catalog-page {
  padding: 2.2rem 0;
}

.catalog-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.catalog-head p {
  color: var(--muted);
  margin-bottom: 0;
}

.catalog-filters {
  margin-top: 1rem;
  margin-bottom: 1rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 220px 120px;
  gap: 0.7rem;
  align-items: end;
}

.catalog-filters label {
  display: grid;
  gap: 0.35rem;
}

.catalog-filters input,
.catalog-filters select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.62rem 0.72rem;
  font: inherit;
}

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

.catalog-grid .course-card {
  display: grid;
  gap: 0.3rem;
}

.catalog-grid .course-card .enroll-btn {
  margin-top: 0.65rem;
}

.exam-page {
  padding: 2.2rem 0;
}

.exam-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.exam-controls {
  margin-top: 1rem;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  gap: 0.8rem;
  align-items: end;
  flex-wrap: wrap;
}

.exam-controls label {
  display: grid;
  gap: 0.35rem;
}

.exam-controls input {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.62rem 0.72rem;
  font: inherit;
  min-width: 160px;
}

#exam-timer {
  margin-left: auto;
  font-size: 1.25rem;
  color: #b42318;
}

.exam-questions {
  margin-top: 1rem;
  display: grid;
  gap: 0.8rem;
}

.exam-question {
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.exam-question h3 {
  margin-bottom: 0.6rem;
}

.exam-options {
  display: grid;
  gap: 0.4rem;
}

.exam-options label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: #31405f;
}

.exam-submit {
  margin-top: 1rem;
}

.progress-track {
  height: 10px;
  border-radius: 999px;
  background: #e5ecfa;
  overflow: hidden;
  margin: 0.4rem 0 0.8rem;
}

.progress-track span {
  display: block;
  height: 100%;
  background: linear-gradient(120deg, var(--primary), #3f79f8);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms ease, transform 420ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .hero-grid,
  .course-layout {
    grid-template-columns: 1fr;
  }

  .journey-grid,
  .cards-grid,
  .dashboard-grid,
  .partner-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .auth-shell,
  .catalog-grid {
    grid-template-columns: 1fr 1fr;
  }

  .catalog-filters {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 780px) {
  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    right: 1rem;
    top: 76px;
    width: min(300px, calc(100% - 2rem));
    flex-direction: column;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    padding: 0.8rem;
  }

  .main-nav.open {
    display: flex;
  }

  .search-row {
    flex-direction: column;
    border-radius: var(--radius-md);
  }

  .search-row button {
    width: 100%;
  }

  .journey-grid,
  .cards-grid,
  .dashboard-grid,
  .partner-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .auth-shell,
  .catalog-grid,
  .catalog-filters {
    grid-template-columns: 1fr;
  }

  .physician-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  #exam-timer {
    margin-left: 0;
  }
}