/* =====================================================
   Data Reinvent — Base Styles
   Content structure & storytelling take priority here;
   visual design is intentionally kept clean and simple.
===================================================== */

:root {
  /* Colors pulled loosely from the Data Reinvent logo gradient */
  --color-blue: #2b4dfa;
  --color-purple: #7b2ff7;
  --color-pink: #e6399f;
  --color-orange: #ff7a3d;

  --color-text: #1c1d26;
  --color-text-muted: #565a6e;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7fb;
  --color-border: #e4e6ef;

  --gradient-brand: linear-gradient(90deg, var(--color-pink), var(--color-purple), var(--color-blue));

  --max-width: 1160px;
  --radius: 10px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1em; }

a {
  color: var(--color-blue);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-purple);
  margin: 0 0 0.6em;
}

.section-lead {
  max-width: 65ch;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* =====================================================
   Buttons
===================================================== */

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: #fff;
  opacity: 0.92;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-text);
  color: var(--color-text);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: var(--color-text);
  color: #fff;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
}

.brand-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
  border-radius: 6px;
}

.brand-name {
  font-weight: 700;
  font-size: 1.1rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  margin: 0 auto;
  transition: transform var(--transition), opacity var(--transition);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.primary-nav ul {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-cta {
  padding: 0.55rem 1.25rem;
  font-size: 0.9rem;
}

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

.hero {
  padding: 6rem 0 5rem;
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}

.hero-inner {
  max-width: 780px;
}

.eyebrow {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.75rem 0 2rem;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.hero-chips li {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background: var(--color-bg);
}

/* =====================================================
   About
===================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
  align-items: start;
}

.about-copy p {
  color: var(--color-text-muted);
}

.about-copy {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.about-copy p:first-child {
  font-size: 1.8rem;
  line-height: 1.6;
  font-style: italic;
  color: var(--color-text);
}

.about-copy p:last-child {
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

.about-principles {
  display: grid;
  gap: 1.5rem;
}

.about-principles h3 {
  margin-bottom: 0.3em;
  font-size: 1.05rem;
}

.about-principles p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 0.95rem;
}

/* =====================================================
   Card grid (Services / Why Us)
===================================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  padding: 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}

.section-alt .card {
  background: var(--color-bg);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(28, 29, 38, 0.06);
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
  font-size: 0.95rem;
}

.card-link {
  display: inline-block;
  margin-top: 0.6rem;
  font-weight: 600;
  font-size: 0.9rem;
}

/* =====================================================
   Training & Workshops
===================================================== */

.training-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  margin-top: 2rem;
}

.training-formats h3,
.training-programs h3 {
  margin-bottom: 1rem;
}

.check-list li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.9rem;
  color: var(--color-text-muted);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-purple);
  font-weight: 700;
}

.program-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.program-list li:first-child {
  padding-top: 0;
}

.program-list li:last-child {
  border-bottom: none;
}

.program-name {
  font-weight: 600;
}

.program-desc {
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.training-note {
  margin-top: 2rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
}

/* =====================================================
   Split layout (ESG / Copilot Solutions)
===================================================== */

.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.split-layout-reverse .split-copy {
  order: 1;
}

.split-layout-reverse .feature-list {
  order: 2;
}

.split-copy p {
  color: var(--color-text-muted);
}

.split-closing {
  font-weight: 600;
  color: var(--color-text) !important;
}

.feature-list li {
  padding: 0.9rem 0 0.9rem 1.75rem;
  position: relative;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gradient-brand);
}

/* =====================================================
   Client Benefits
===================================================== */

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.benefit h3 {
  margin-bottom: 0.3em;
}

.benefit p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* =====================================================
   Insights & Resources — Article Cards
   (Medium.com-inspired cards, Fluent-style elevation)
===================================================== */

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(28, 29, 38, 0.09);
  border-color: transparent;
}

.article-card-media {
  display: block;
  aspect-ratio: 5 / 3;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.article-thumb {
  width: 100%;
  height: 100%;
  display: block;
  transition: transform 0.35s ease;
}

img.article-thumb {
  object-fit: cover;
}

.article-card:hover .article-thumb {
  transform: scale(1.04);
}

.article-card-body {
  padding: 1.5rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-category {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-purple);
  margin: 0 0 0.6em;
}

.article-card-body h3 {
  margin: 0 0 0.6em;
  font-size: 1.15rem;
  line-height: 1.35;
}

.article-card-body h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.article-card-body h3 a:hover,
.article-card-body h3 a:focus-visible {
  text-decoration: underline;
}

.article-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.1rem;
  flex: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.article-meta .dot {
  opacity: 0.6;
}

/* ---------- Insights pagination ---------- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
}

.pagination-btn {
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.pagination-btn:hover:not(:disabled):not(.is-active),
.pagination-btn:focus-visible:not(:disabled) {
  border-color: var(--color-text);
}

.pagination-btn.is-active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
  cursor: default;
}

.pagination-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.pagination-arrow {
  font-size: 1.1rem;
  line-height: 1;
}

/* =====================================================
   Article Detail Pages
   (Medium-inspired reading layout, Fluent surfaces)
===================================================== */

.article-cover {
  margin: 2.5rem auto;
  border-radius: 14px;
  overflow: hidden;
}

.article-cover-image {
  width: 100%;
  height: auto;
  display: block;
}

.container-narrow {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-medium {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 2.5rem;
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--color-text);
}

.article-page-header {
  padding-top: 1.25rem;
  padding-bottom: 1rem;
}

.article-category-tag {
  display: inline-block;
  background: rgba(123, 47, 247, 0.08);
  color: var(--color-purple);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.article-title {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 2.85rem);
  line-height: 1.18;
  margin: 0 0 0.55em;
  color: var(--color-text);
}

.article-deck {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 1.75rem;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.byline-text strong {
  display: block;
  color: var(--color-text);
  font-size: 0.95rem;
}

.article-cover {
  margin: 2.5rem auto;
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 21 / 9;
}

.article-cover svg {
  width: 100%;
  height: 100%;
  display: block;
}

.article-body {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
  padding-bottom: 1rem;
}

.article-body h2 {
  font-size: 1.55rem;
  margin: 1.9em 0 0.6em;
}

.article-body h3 {
  font-size: 1.2rem;
  margin: 1.7em 0 0.5em;
}

.article-body p {
  margin-bottom: 1.4em;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.4em 1.2rem;
  padding-left: 1rem;
}

.article-body li {
  margin-bottom: 0.55em;
}

.article-body blockquote {
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: 1.4rem;
  line-height: 1.5;
  border-left: 3px solid var(--color-text);
  padding-left: 1.25rem;
  margin: 1.8em 0;
  color: var(--color-text);
}

.article-body code {
  font-family: Consolas, "Courier New", monospace;
  background: var(--color-bg-alt);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.92em;
}

.code-block {
  background: #1c1d26;
  color: #e9eaf2;
  padding: 1.25rem 1.5rem;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.6em 0;
}

.code-block code {
  background: none;
  padding: 0;
  color: inherit;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre;
}

.callout {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-purple);
  padding: 1.25rem 1.5rem;
  border-radius: 8px;
  margin: 2em 0;
  font-size: 1.02rem;
}

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

.callout-label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-purple);
  margin-bottom: 0.5em;
}

.article-footer-cta {
  max-width: 700px;
  margin: 3.5rem auto 1rem;
  padding: 2.25rem 2rem;
  text-align: center;
  background: var(--color-bg-alt);
  border-radius: 14px;
}

.article-footer-cta h3 {
  margin-bottom: 0.5em;
}

.article-footer-cta p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.related-section {
  padding: 4rem 0 5rem;
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
}

.related-section h2 {
  font-size: 1.4rem;
}

/* =====================================================
   Testimonials
===================================================== */

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.testimonial {
  margin: 0;
  padding: 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.testimonial p {
  font-size: 1.02rem;
  margin-bottom: 1rem;
}

.testimonial footer {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 600;
}

/* =====================================================
   Contact
===================================================== */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-intro p {
  color: var(--color-text-muted);
}

.contact-details {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.9rem;
}

.contact-details li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.contact-details span {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.contact-form {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  display: grid;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form-row label {
  font-weight: 600;
  font-size: 0.9rem;
}

.form-row input,
.form-row select,
.form-row textarea {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font: inherit;
  background: #fff;
  color: var(--color-text);
}

.form-row input:focus-visible,
.form-row select:focus-visible,
.form-row textarea:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 1px;
}

.form-submit {
  justify-self: start;
}

.form-status {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 1.2em;
}

.form-status.success {
  color: #1a8a4a;
}

.form-status.error {
  color: #c73c3c;
}

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

.site-footer {
  background: var(--color-text);
  color: #d9dae2;
  padding: 4rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-brand .brand {
  color: #fff;
}

.footer-brand p {
  color: #a7a9bb;
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.footer-links h3 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.footer-links ul {
  display: grid;
  gap: 0.65rem;
}

.footer-links a {
  color: #a7a9bb;
  font-size: 0.9rem;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #fff;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #3a3b47;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #a7a9bb;
}

.footer-legal {
  display: flex;
  gap: 1.25rem;
}

.footer-legal a {
  color: #a7a9bb;
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: #fff;
}

.back-to-top {
  color: #a7a9bb;
  font-size: 0.85rem;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  color: #fff;
}

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

@media (max-width: 900px) {
  .about-grid,
  .training-layout,
  .split-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .split-layout-reverse .split-copy,
  .split-layout-reverse .feature-list {
    order: initial;
  }

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

@media (max-width: 760px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 1.5rem 1.5rem;
    display: none;
  }

  .primary-nav.is-open {
    display: flex;
  }

  .primary-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .primary-nav ul li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-link {
    display: block;
    padding: 0.9rem 0;
  }

  .nav-cta {
    margin-top: 1rem;
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 3.5rem 0;
  }

  .hero {
    padding: 4rem 0 3rem;
  }
}