/* =========================================================
   RAG Beyond the Demo
   Page-specific styles
   ========================================================= */

:root {
  --session-bg: #f5f3ee;
  --session-surface: #ffffff;
  --session-surface-soft: #ebe7df;
  --session-text: #172026;
  --session-text-soft: #526069;
  --session-border: rgba(23, 32, 38, 0.14);
  --session-accent: #9b5d31;
  --session-accent-dark: #774321;
  --session-dark: #172026;
  --session-dark-soft: #223039;
  --session-radius: 22px;
  --session-shadow: 0 20px 55px rgba(23, 32, 38, 0.1);
}


/* =========================================================
   General page behaviour
   ========================================================= */

html {
  scroll-behavior: smooth;
}

body {
  background: var(--session-bg);
  color: var(--session-text);
}

img {
  max-width: 100%;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--session-surface-soft);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-heading h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.section-heading > p:last-child {
  margin: 0;
  color: var(--session-text-soft);
  font-size: 1.08rem;
  line-height: 1.75;
}

.eyebrow,
.card-eyebrow {
  margin: 0 0 14px;
  color: var(--session-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}


.container {
    width: min(1200px, calc(100% - 64px));
    margin-inline: auto;
}



/* =========================================================
   Header
   ========================================================= */

.site-header {
  position: relative;
  z-index: 20;
  background: rgba(245, 243, 238, 0.94);
  border-bottom: 1px solid var(--session-border);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.site-brand {
  color: var(--session-text);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 26px;
}

.site-nav a {
  color: var(--session-text-soft);
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
  transition:
    color 160ms ease,
    transform 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--session-accent-dark);
  transform: translateY(-1px);
}


/* =========================================================
   Hero
   ========================================================= */

.session-hero {
  position: relative;
  overflow: hidden;
  padding: 112px 0 104px;
  background:
    radial-gradient(
      circle at 88% 16%,
      rgba(155, 93, 49, 0.14),
      transparent 28%
    ),
    linear-gradient(
      145deg,
      #f7f5f0 0%,
      #ece7df 100%
    );
}

.session-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.22;
  pointer-events: none;
  background-image:
    linear-gradient(
      rgba(23, 32, 38, 0.08) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(23, 32, 38, 0.08) 1px,
      transparent 1px
    );
  background-size: 42px 42px;
  mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.8),
    transparent 85%
  );
}

.session-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: 72px;
}

.session-hero-content {
  max-width: 820px;
}

.session-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(3.4rem, 7vw, 6.8rem);
  line-height: 0.94;
  letter-spacing: -0.065em;
}

.session-subtitle {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--session-accent-dark);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 700;
  line-height: 1.35;
}

.session-introduction {
  max-width: 700px;
  margin: 28px 0 0;
  color: var(--session-text-soft);
  font-size: 1.12rem;
  line-height: 1.8;
}

.session-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(130px, 1fr));
  gap: 14px;
  margin-top: 38px;
}

.meta-item {
  min-height: 108px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid var(--session-border);
  border-radius: 16px;
  box-shadow: 0 12px 35px rgba(23, 32, 38, 0.05);
}

.meta-label {
  display: block;
  margin-bottom: 7px;
  color: var(--session-text-soft);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.meta-item strong {
  display: block;
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-note {
  max-width: 620px;
  margin: 18px 0 0;
  color: var(--session-text-soft);
  font-size: 0.92rem;
  line-height: 1.6;
}


/* =========================================================
   Buttons and links
   ========================================================= */

.btn {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--session-accent);
  color: #ffffff;
  box-shadow: 0 13px 28px rgba(155, 93, 49, 0.26);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--session-accent-dark);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(23, 32, 38, 0.2);
  color: var(--session-text);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: #ffffff;
  border-color: var(--session-accent);
  color: var(--session-accent-dark);
}

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--session-accent-dark);
  font-weight: 750;
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}


/* =========================================================
   Hero summary card
   ========================================================= */

.session-summary-card {
  padding: 34px;
  color: #ffffff;
  background:
    linear-gradient(
      160deg,
      var(--session-dark-soft),
      var(--session-dark)
    );
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--session-radius);
  box-shadow: var(--session-shadow);
}

.session-summary-card .card-eyebrow {
  color: #ddb48f;
}

.session-summary-card h2 {
  margin: 0 0 26px;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
}

.summary-list {
  display: grid;
  gap: 15px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.summary-list li {
  position: relative;
  padding-left: 26px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.5;
}

.summary-list li::before {
  content: "";
  position: absolute;
  top: 0.58em;
  left: 0;
  width: 10px;
  height: 10px;
  background: #d7a67e;
  border-radius: 50%;
}

.session-summary-card .text-link {
  color: #f0caaa;
}


/* =========================================================
   Why this session
   ========================================================= */

.content-grid {
  display: grid;
  gap: 44px;
}

.two-columns {
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  align-items: start;
}

.prose {
  color: var(--session-text-soft);
  font-size: 1.07rem;
  line-height: 1.85;
}

.prose p:first-child {
  margin-top: 0;
}

.prose p:last-child {
  margin-bottom: 0;
}

.inline-flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
  padding: 22px;
  background: var(--session-surface);
  border: 1px solid var(--session-border);
  border-radius: 18px;
  box-shadow: 0 12px 35px rgba(23, 32, 38, 0.06);
}

.inline-flow span:nth-child(odd) {
  padding: 9px 13px;
  background: var(--session-bg);
  border: 1px solid rgba(23, 32, 38, 0.1);
  border-radius: 10px;
  color: var(--session-text);
  font-weight: 700;
}

.inline-flow span:nth-child(even) {
  color: var(--session-accent);
  font-weight: 900;
}

.callout-card {
  padding: 34px;
  background: var(--session-surface);
  border-left: 5px solid var(--session-accent);
  border-radius: 0 var(--session-radius) var(--session-radius) 0;
  box-shadow: var(--session-shadow);
}

.callout-card p {
  margin: 0;
  font-size: 1.16rem;
  line-height: 1.7;
}

.callout-card p + p {
  margin-top: 20px;
  color: var(--session-accent-dark);
  font-weight: 750;
}


/* =========================================================
   Learning outcomes
   ========================================================= */

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

.learning-card {
  position: relative;
  min-height: 270px;
  padding: 30px;
  background: var(--session-surface);
  border: 1px solid var(--session-border);
  border-radius: var(--session-radius);
  box-shadow: 0 12px 35px rgba(23, 32, 38, 0.06);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.learning-card:hover {
  transform: translateY(-5px);
  border-color: rgba(155, 93, 49, 0.45);
  box-shadow: 0 22px 48px rgba(23, 32, 38, 0.11);
}

.card-number {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--session-accent);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.learning-card h3 {
  margin: 0 0 14px;
  font-size: 1.3rem;
  line-height: 1.28;
}

.learning-card p {
  margin: 0;
  color: var(--session-text-soft);
  line-height: 1.72;
}


/* =========================================================
   Agenda
   ========================================================= */

.agenda {
  overflow: hidden;
  background: var(--session-surface);
  border: 1px solid var(--session-border);
  border-radius: var(--session-radius);
  box-shadow: var(--session-shadow);
}

.agenda-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 34px;
  padding: 32px 36px;
}

.agenda-item + .agenda-item {
  border-top: 1px solid var(--session-border);
}

.agenda-time {
  color: var(--session-accent);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.agenda-content h3 {
  margin: 0 0 9px;
  font-size: 1.26rem;
}

.agenda-content p {
  margin: 0;
  color: var(--session-text-soft);
  line-height: 1.7;
}

.agenda-note {
  margin: 22px 0 0;
  color: var(--session-text-soft);
  font-size: 0.96rem;
  line-height: 1.65;
}


/* =========================================================
   Audience
   ========================================================= */

.audience-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.7fr);
  align-items: start;
  gap: 44px;
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.audience-item {
  padding: 26px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--session-border);
  border-radius: 18px;
}

.audience-item h3 {
  margin: 0 0 11px;
  font-size: 1.18rem;
}

.audience-item p {
  margin: 0;
  color: var(--session-text-soft);
  line-height: 1.68;
}

.prerequisite-card {
  padding: 34px;
  background: var(--session-dark);
  color: #ffffff;
  border-radius: var(--session-radius);
  box-shadow: var(--session-shadow);
}

.prerequisite-card .card-eyebrow {
  color: #ddb48f;
}

.prerequisite-card h3 {
  margin: 0 0 17px;
  font-size: 1.55rem;
  line-height: 1.25;
}

.prerequisite-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.75;
}

.prerequisite-card p + p {
  margin-top: 18px;
}


/* =========================================================
   Engineering panel
   ========================================================= */

.engineering-section {
  padding-top: 46px;
  padding-bottom: 46px;
  background: var(--session-dark);
}

.engineering-panel {
  max-width: 920px;
  margin: 0 auto;
  padding: 54px;
  color: #ffffff;
  text-align: center;
  background:
    radial-gradient(
      circle at top right,
      rgba(155, 93, 49, 0.28),
      transparent 30%
    ),
    var(--session-dark-soft);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 28px;
}

.engineering-panel .eyebrow {
  color: #ddb48f;
}

.engineering-panel h2 {
  margin: 0 0 24px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.engineering-panel p {
  max-width: 760px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.06rem;
  line-height: 1.8;
}

.engineering-panel p + p {
  margin-top: 20px;
}


/* =========================================================
   Presenter
   ========================================================= */

.presenter-card {
  overflow: hidden;
  background:
    linear-gradient(
      135deg,
      var(--session-surface),
      #efeae2
    );
  border: 1px solid var(--session-border);
  border-radius: 28px;
  box-shadow: var(--session-shadow);
}

.presenter-content {
  max-width: 900px;
  padding: 56px;
}

.presenter-content h2 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4vw, 3.35rem);
  letter-spacing: -0.035em;
}

.presenter-title {
  margin: 0 0 26px;
  color: var(--session-accent-dark);
  font-weight: 750;
}

.presenter-content > p:not(.eyebrow):not(.presenter-title) {
  color: var(--session-text-soft);
  font-size: 1.04rem;
  line-height: 1.78;
}

.presenter-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 30px;
}


/* =========================================================
   Registration CTA
   ========================================================= */

.registration-cta {
  padding: 84px 0;
  background: var(--session-accent-dark);
  color: #ffffff;
}

.registration-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(250px, 0.7fr);
  align-items: center;
  gap: 50px;
}

.registration-cta .eyebrow {
  color: #f0caaa;
}

.registration-cta h2 {
  margin: 0 0 14px;
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.registration-cta p {
  max-width: 690px;
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.75;
}

.registration-cta-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 15px;
}

.registration-cta-action .btn-primary {
  background: #ffffff;
  color: var(--session-accent-dark);
  box-shadow: none;
}

.registration-cta-action .btn-primary:hover,
.registration-cta-action .btn-primary:focus-visible {
  background: #f2e7dc;
  color: var(--session-accent-dark);
}

.registration-cta-action p {
  font-size: 0.9rem;
}


/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  padding: 42px 0;
  background: #11191e;
  color: rgba(255, 255, 255, 0.74);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 34px;
}

.site-footer strong {
  color: #ffffff;
}

.site-footer p {
  margin: 6px 0 0;
  font-size: 0.9rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: #ffffff;
}

.copyright {
  white-space: nowrap;
}


/* =========================================================
   Responsive layout
   ========================================================= */

@media (max-width: 1080px) {
  .session-hero-grid,
  .two-columns,
  .audience-layout,
  .registration-cta-inner {
    grid-template-columns: 1fr;
  }

  .session-summary-card {
    max-width: 680px;
  }

  .learning-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .registration-cta-action {
    align-items: flex-start;
  }
}


@media (max-width: 820px) {
  .section {
    padding: 76px 0;
  }

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

  .site-nav {
    gap: 16px 20px;
  }

  .session-hero {
    padding: 84px 0 76px;
  }

  .session-hero-grid {
    gap: 46px;
  }

  .session-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .audience-list {
    grid-template-columns: 1fr;
  }

  .agenda-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .copyright {
    white-space: normal;
  }
}


@media (max-width: 640px) {
  .session-hero h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

  .session-subtitle {
    font-size: 1.35rem;
  }

  .session-meta,
  .learning-grid {
    grid-template-columns: 1fr;
  }

  .meta-item {
    min-height: auto;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .session-summary-card,
  .learning-card,
  .callout-card,
  .prerequisite-card {
    padding: 26px;
  }

  .inline-flow {
    align-items: stretch;
    flex-direction: column;
  }

  .inline-flow span {
    text-align: center;
  }

  .inline-flow span:nth-child(even) {
    transform: rotate(90deg);
  }

  .agenda-item {
    padding: 26px;
  }

  .engineering-panel,
  .presenter-content {
    padding: 34px 24px;
  }

  .presenter-links {
    flex-direction: column;
    gap: 14px;
  }

  .registration-cta {
    padding: 66px 0;
  }

  .registration-cta-action,
  .registration-cta-action .btn {
    width: 100%;
  }
}


/* =========================================================
   Accessibility
   ========================================================= */

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(155, 93, 49, 0.45);
  outline-offset: 4px;
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}