/* ==========================================
   OYIN WILLIAMS PORTFOLIO
   Base stylesheet — no framework dependencies
   ========================================== */

/* VARIABLES */
:root {
  --turquoise: #16ebdd;
  --dark-slate: #28647f;
  --azure: #d0fffd;
  --azure-mid: #b5fffc;
  --azure-light: #ebfffe;
  --midnight: #1f5269;
  --pitch-dark: #041d21;
  --white: #fff;
  --text-body: #eee;

  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-sans: 'Source Sans 3', sans-serif;
  --font-mono: 'Source Code Pro', monospace;
  --font-display: 'Inconsolata', monospace;
}

/* RESET */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--azure);
  color: var(--dark-slate);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  padding-top: 70px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
}

sup {
  font-size: 0.65em;
  vertical-align: super;
}

/* ==========================================
   NAV
   ========================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s;
}

.nav.scrolled {
  background: rgba(208, 255, 253, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(40, 100, 127, 0.1);
}

.nav-inner {
  max-width: 90%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.nav-logo img {
  opacity: 0;
  transition: opacity 0.4s;
  width: 80px;
}

.nav-logo img.loaded {
  opacity: 1;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--dark-slate);
  transition: color 0.3s;
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: var(--turquoise);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

/* Mobile Nav */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: #24f0e2;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  justify-content: center;
  align-items: center;
  gap: 32px;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.nav-mobile.open {
  opacity: 1;
  pointer-events: all;
}

.nav-mobile-link {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--dark-slate);
  text-decoration: none;
}

/* ==========================================
   REVEAL ANIMATIONS
   ========================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

.reveal-delay-1 {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.24s;
}

.reveal-delay-3 {
  transition-delay: 0.36s;
}

/* ==========================================
   HERO (index)
   ========================================== */
.hero {
  background-color: var(--azure);
  padding: 80px 10% 80px;
}

.hero-inner {
  max-width: 700px;
}

.hero-heading {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--dark-slate);
  margin-bottom: 24px;
}

.hero-body {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.75rem;
  color: var(--dark-slate);
  margin-bottom: 32px;
  padding-right: 10%;
}

.hero-body a {
  color: var(--dark-slate);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--turquoise);
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.hero-body a:hover {
  color: var(--turquoise);
  text-decoration-color: var(--turquoise);
}

.btn {
  display: inline-block;
  border: 2px solid var(--turquoise);
  background-color: var(--turquoise);
  color: var(--dark-slate);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.09em;
  border-radius: 100px;
  padding: 14px 56px;
  transition: background-color 0.2s ease-in-out;
  cursor: pointer;
}

.btn:hover {
  background-color: transparent;
  color: var(--dark-slate);
}

/* ==========================================
   WORK SECTION
   ========================================== */
.work-section {
  background-color: var(--azure-mid);
  padding: 60px 10% 100px;
}

.work-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 600;
  line-height: 1.25em;
  color: var(--dark-slate);
  margin-bottom: 48px;
  margin-left: 10px;
}

.section-divider {
  border-top: 2px solid #1eebe6;
  margin: 0 0 60px;
  padding-bottom: 0;
}

/* Project rows */
.project-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  margin-bottom: 60px;
  align-items: start;
}

.project-image {
  margin-top: 40px;
}

.project-image img {
  width: 100%;
  transition: opacity 0.2s ease;
}

.project-image img:hover {
  opacity: 0.9;
}

.project-content {
  padding: 20px 0 0 4em;
  border: 0;
}

.project-title {
  font-family: var(--font-sans);
  font-size: clamp(22px, 2.5vw, 36px);
  font-weight: 600;
  line-height: 1.25;
  color: var(--dark-slate);
  margin-top: 20px;
  margin-bottom: 0;
}

.project-tags {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: #6b8b9a;
  letter-spacing: 0.05em;
  line-height: 1.75;
  margin-top: 10px;
  margin-bottom: 16px;
}

.project-desc {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.75rem;
  color: var(--dark-slate);
  margin-bottom: 0;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: 20px;
  font-family: var(--font-sans);
  font-size: 21px;
  font-weight: 600;
  color: var(--dark-slate);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
  cursor: pointer;
}

.project-link:hover {
  color: #4289a9;
}

.project-link.coming-soon {
  cursor: default;
  opacity: 0.6;
}

.project-link.coming-soon:hover {
  color: var(--dark-slate);
}

.arrow {
  transition: transform 0.2s;
  flex-shrink: 0;
}

.project-link:hover .arrow {
  transform: translateX(4px);
}

/* ==========================================
   RESEARCH SECTION
   ========================================== */
.research-section {
  background-color: var(--midnight);
  padding: 100px 10%;
}

.research-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 0 10%;
}

.section-heading-light {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 600;
  color: #fdfdfd;
  margin-bottom: 48px;
}

.research-bio p {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 2rem;
  color: var(--dark-slate);
  margin-bottom: 32px;
  color: rgba(208, 255, 253, 0.8);
}

.research-paper {
  border-bottom: 1px solid var(--azure-light);
  padding-bottom: 40px;
  margin-bottom: 40px;
}

.research-paper:last-child {
  border-bottom: none;
}

.research-paper h3 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  color: var(--turquoise);
  margin-top: 0;
  margin-bottom: 12px;
  line-height: 1.35;
}

.research-paper p {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  color: #bdd3d2;
  margin-bottom: 20px;
}

.paper-link {
  display: inline-block;
  border: 1px solid var(--turquoise);
  color: var(--turquoise);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.03em;
  border-radius: 100px;
  padding: 6px 18px;
  text-decoration: none;
  transition: background-color 0.2s;
}

.paper-link:hover {
  background-color: var(--turquoise);
  color: var(--midnight);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
  background-color: #28f3e5;
  padding: 60px 10% 10px;
}

.footer-connect {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--dark-slate);
  opacity: 0.8;
  margin-bottom: 32px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-socials a img {
  opacity: 0.7;
  transition: opacity 0.2s;
}

.footer-socials a:hover img {
  opacity: 1;
}

.footer-copy {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--dark-slate);
}

.footer-copy img {
  opacity: 0.8;
}

.footer-line {
  border-top: 1px solid var(--dark-slate);
  margin-top: 20px;
  padding-bottom: 48px;
}

/* ==========================================
   ABOUT PAGE
   ========================================== */
.page-about body,
body.page-about {
  background-color: var(--azure);
}

.about-hero {
  background-color: var(--azure);
  padding: 60px 10% 80px;
}

.about-hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 40px;
  align-items: end;
}

.about-h1-light {
  font-family: var(--font-serif);
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--turquoise);
  margin-bottom: 0;
}

.about-h1-dark {
  font-family: var(--font-serif);
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--dark-slate);
  margin-top: 0;
  margin-bottom: 24px;
}

.bodytext {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.75rem;
  color: var(--dark-slate);
}

.about-hero-image {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin-top: auto;
}

.about-hero-image img {
  max-width: 80%;
  margin-left: auto;
}

/* More about / philosophy */
.about-more {
  background-color: var(--midnight);
  padding: 100px 10%;
}

.about-more-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.about-more-heading {
  font-family: var(--font-serif);
  font-size: clamp(36px, 4vw, 48px);
  font-weight: 600;
  color: var(--turquoise);
  margin-bottom: 48px;
  line-height: 5rem;
}

.about-richtext {
  border-bottom: 1px solid var(--azure-light);
  color: #bdd3d2;
  margin-bottom: 40px;
  padding-bottom: 40px;
  font-family: var(--font-sans);
}

.about-richtext.philosophy {
  border-bottom: none;
}

.about-richtext p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.75;
  color: #bdd3d2;
  margin-bottom: 20px;
}

.about-richtext strong {
  color: var(--turquoise);
  font-weight: 700;
}

.about-richtext em {
  font-style: italic;
}

.about-richtext h3 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  color: var(--turquoise);
  margin-bottom: 24px;
  margin-top: 0;
}

.about-richtext h4 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--turquoise);
  letter-spacing: 0.05em;
  margin-top: 32px;
  margin-bottom: 8px;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-section {
  background-color: #d3fffd;
  padding: 80px 10%;
}

.contact-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.contact-row {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 40px;
  margin-top: 40px;
}

.contact-left .bodytext {
  font-size: 15px;
  line-height: 1.75;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
}

.form-field-full {
  grid-column: 1 / -1;
}

label {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-slate);
  margin-bottom: 6px;
  display: block;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
  border: none;
  border-bottom: 2px solid var(--turquoise);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--dark-slate);
  padding: 8px 0;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}

input:focus,
textarea:focus {
  border-bottom-color: var(--dark-slate);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-btn {
  float: right;
  border: 2px solid var(--turquoise);
  background-color: var(--turquoise);
  color: var(--dark-slate);
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 100px;
  padding: 14px 40px;
  margin-top: 24px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.submit-btn:hover {
  background-color: transparent;
}

.form-success {
  margin-top: 16px;
  padding: 12px 16px;
  background: #d1f7f4;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--midnight);
}

.form-error {
  margin-top: 16px;
  padding: 12px 16px;
  background: #ffdede;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: #a00;
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 991px) {
  .research-inner {
    grid-template-columns: 1fr;
  }

  .about-hero-inner {
    grid-template-columns: 1fr;
  }

  .about-hero-image img {
    max-width: 60%;
    margin: 0 auto;
  }

  .contact-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  body {
    padding-top: 60px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .nav-mobile {
    display: flex;
  }

  .hero {
    padding: 40px 5% 60px;
  }

  .hero-body {
    padding-right: 0;
  }

  .work-section {
    padding: 20px 5% 60px;
  }

  .section-heading {
    text-align: center;
  }

  .project-row {
    grid-template-columns: 1fr;
    margin-bottom: 32px;
  }

  .project-image {
    margin-top: 0;
  }

  .project-content {
    padding-left: 0;
    margin-top: 20px;
  }

  .project-title {
    font-size: 1.7rem;
    line-height: 2rem;
    margin-top: 0;
  }

  .project-tags {
    font-size: 1rem;
    line-height: 1.5rem;
    color: #95c2d7;
    margin-bottom: 0;
  }

  .project-link {
    font-size: 1rem;
    margin-top: 10px;
  }

  .research-section {
    padding: 60px 7% 60px 7%;
  }

  .section-heading-light {
    text-align: left;
  }

  .about-hero {
    padding: 40px 5% 60px;
  }

  .about-more {
    padding: 60px 5%;
  }

  .about-more-heading {
    font-size: 2rem;
  }

  .contact-section {
    padding: 40px 5%;
  }

  .footer {
    padding: 40px 5% 10px;
  }

  .footer-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .footer-copy {
    margin: 0 auto;
  }
}

@media (max-width: 479px) {
  .hero-heading {
    font-size: 2.5rem;
    line-height: 2.5rem;
  }

  .btn {
    padding: 10px 30px;
    font-size: 1rem;
  }

  .about-h1-light,
  .about-h1-dark {
    font-size: 3rem;
  }

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

  .submit-btn {
    float: none;
    width: 100%;
  }
}

/* ==========================================
   CASE STUDY PAGE
   ========================================== */
.cs-border {
  --cs-line: rgba(40, 100, 127, 0.14);
}

body.page-case-study {
  background-color: var(--azure);
}

/* Hero */
.cs-hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 48px 80px;
}

.cs-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dark-slate);
  background: var(--azure-light);
  border: 1px solid var(--turquoise);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.cs-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--turquoise);
  border-radius: 50%;
}

.cs-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 600;
  line-height: 1.12;
  color: var(--dark-slate);
  margin-bottom: 24px;
}

.cs-hero h1 em {
  font-style: italic;
  color: var(--turquoise);
}

.cs-subtitle {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.75;
  color: var(--dark-slate);
  max-width: 600px;
  margin-bottom: 48px;
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  padding-top: 40px;
  border-top: 2px solid var(--turquoise);
}

.cs-meta-item label {
  display: block;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6b8b9a;
  margin-bottom: 6px;
}

.cs-meta-item span {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--dark-slate);
}

/* Cover image */
.cs-cover {
  max-width: 1100px;
  margin: 0 auto 100px;
  padding: 0 48px;
}

.cs-cover-frame {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(40, 100, 127, 0.14);
  background: var(--azure-light);
  box-shadow: 0 32px 80px rgba(40, 100, 127, 0.14), 0 2px 8px rgba(40, 100, 127, 0.08);
}

.cs-cover-frame img {
  width: 100%;
  max-height: 560px;
  object-fit: cover;
  object-position: top center;
  border-radius: 16px;
}

/* Section structure */
.cs-section {
  max-width: 760px;
  margin: 0 auto;
  padding: 80px 48px 20px 48px;
}

.cs-section+.cs-section {
  padding-top: 0;
}

.cs-section p.cs-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--turquoise);
  margin-bottom: 16px;
  line-height: 1.5;
}

.cs-section h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 600;
  line-height: 1.22;
  color: var(--dark-slate);
  margin-bottom: 20px;
}

.cs-section h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--dark-slate);
  margin-top: 40px;
  margin-bottom: 12px;
}

.cs-section p {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.85;
  color: var(--dark-slate);
  margin-bottom: 16px;
}

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

/* Divider */
.cs-divider {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 48px;
}

.cs-divider hr {
  border: none;
  border-top: 1px solid rgba(40, 100, 127, 0.14);
}

/* Pull quote */
.cs-quote {
  margin: 56px 0;
  padding: 40px 48px;
  background: var(--midnight);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
}

.cs-quote::before {
  content: '\201C';
  font-family: var(--font-serif);
  font-size: 200px;
  font-weight: 600;
  color: rgba(22, 235, 221, 0.14);
  position: absolute;
  top: -40px;
  left: 24px;
  line-height: 1;
  pointer-events: none;
}

.cs-quote p {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 400;
  font-style: italic;
  color: var(--azure-light);
  line-height: 1.55;
  position: relative;
  z-index: 1;
  margin: 0;
}

.cs-quote cite {
  display: block;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-style: normal;
  color: rgba(208, 255, 253, 0.55);
  letter-spacing: 0.04em;
  position: relative;
  z-index: 1;
}

/* Stat grid */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 48px 0;
}

.cs-stat {
  background: var(--white);
  border: 1px solid rgba(40, 100, 127, 0.14);
  border-radius: 12px;
  padding: 28px 24px;
  text-align: center;
}

.cs-stat-num {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 600;
  color: var(--turquoise);
  line-height: 1;
  margin-bottom: 8px;
}

.cs-stat-label {
  font-family: var(--font-sans);
  font-size: 13px;
  color: #6b8b9a;
  line-height: 1.4;
}

/* Process steps */
.cs-steps {
  margin: 48px 0;
  display: flex;
  flex-direction: column;
}

.cs-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px solid rgba(40, 100, 127, 0.14);
  align-items: start;
}

.cs-step-num {
  font-family: var(--font-serif);
  font-size: 14px;
  font-style: italic;
  color: var(--dark-slate);
  padding-top: 2px;
}

.cs-step h4 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-slate);
  margin-bottom: 8px;
}

.cs-step p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.75;
  color: var(--dark-slate);
  margin: 0;
}

/* Screen showcase */
.cs-screens {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 48px;
}

.cs-screens-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6b8b9a;
  margin-bottom: 32px;
  text-align: center;
}

.cs-screens-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.cs-screens-grid.three-col {
  grid-template-columns: repeat(3, 1fr);
}

.cs-screens-grid.single {
  grid-template-columns: 1fr;
}

.cs-screen {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(40, 100, 127, 0.14);
  background: var(--white);
  box-shadow: 0 8px 32px rgba(40, 100, 127, 0.08);
}

.cs-screen.tall {
  grid-row: span 2;
}

.cs-screen.wide {
  grid-column: 1 / -1;
}

.cs-screen img {
  width: 100%;
  display: block;
}

/* Tall full-page screenshots: show the top, crop the overflow */
.cs-screen.crop img {
  max-height: 620px;
  object-fit: cover;
  object-position: top center;
}

.cs-screen-caption {
  padding: 14px 18px;
  border-top: 1px solid rgba(40, 100, 127, 0.14);
  font-family: var(--font-mono);
  font-size: 12px;
  color: #6b8b9a;
}

/* Insight cards */
.cs-insights {
  margin: 48px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cs-insight {
  background: var(--white);
  border: 1px solid rgba(40, 100, 127, 0.14);
  border-radius: 12px;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.cs-insight::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--turquoise);
}

.cs-insight.alt::before {
  background: var(--dark-slate);
}

.cs-insight.alt2::before {
  background: var(--midnight);
}

.cs-insight h4 {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--dark-slate);
  margin-bottom: 10px;
}

.cs-insight p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: var(--dark-slate);
  margin: 0;
}

/* Tag list */
.cs-taglist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0;
}

.cs-tagpill {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--dark-slate);
  background: var(--white);
  border: 1px solid rgba(40, 100, 127, 0.14);
  border-radius: 100px;
  padding: 5px 14px;
}

/* Outcome list */
.cs-outcomes {
  margin: 40px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cs-outcome {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 24px;
  background: var(--white);
  border: 1px solid rgba(40, 100, 127, 0.14);
  border-radius: 12px;
}

.cs-outcome .cs-out-icon {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--turquoise);
  flex-shrink: 0;
}

.cs-outcome p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.75;
  color: var(--dark-slate);
  margin: 0;
}

.cs-outcome strong {
  font-weight: 600;
  color: var(--dark-slate);
}

/* Reflection */
.cs-reflection {
  background: var(--azure-light);
  border: 1px solid var(--turquoise);
  border-radius: 16px;
  padding: 48px;
  margin: 48px 0;
}

.cs-reflection h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--dark-slate);
  margin-top: 0;
  margin-bottom: 16px;
}

.cs-reflection p {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.85;
  color: var(--dark-slate);
  margin-bottom: 16px;
}

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

/* Footer CTA */
.cs-cta {
  background-color: var(--midnight);
  padding: 100px 10%;
  text-align: center;
}

.cs-cta h2 {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 600;
  color: #fdfdfd;
  line-height: 1.15;
  margin-bottom: 20px;
}

.cs-cta h2 em {
  font-style: italic;
  color: var(--turquoise);
}

.cs-cta p {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(208, 255, 253, 0.7);
  max-width: 480px;
  margin: 0 auto 40px;
}

.cs-btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cs-btn-outline {
  display: inline-block;
  padding: 14px 40px;
  background: transparent;
  color: var(--turquoise);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 100px;
  border: 2px solid var(--turquoise);
  transition: background-color 0.2s, color 0.2s;
}

.cs-btn-outline:hover {
  background: var(--turquoise);
  color: var(--midnight);
}

/* Case study responsive */
@media (max-width: 991px) {
  .cs-screens-grid {
    gap: 16px;
  }

  .cs-screens-grid.three-col {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .cs-hero {
    padding: 40px 5% 60px;
  }

  .cs-section {
    padding: 60px 5%;
  }

  .cs-divider,
  .cs-cover {
    padding: 0 5%;
  }

  .cs-screens {
    padding: 40px 5%;
  }

  .cs-cta {
    padding: 60px 5%;
  }

  .cs-meta {
    gap: 24px;
  }

  .cs-stats {
    grid-template-columns: 1fr 1fr;
  }

  .cs-screens-grid,
  .cs-screens-grid.three-col,
  .cs-insights {
    grid-template-columns: 1fr;
  }

  .cs-screen.tall {
    grid-row: span 1;
  }

  .cs-screen.crop img {
    max-height: 480px;
  }

  .cs-reflection {
    padding: 32px 24px;
  }

  .cs-quote {
    padding: 32px 24px;
  }
}

@media (max-width: 479px) {
  .cs-hero h1 {
    font-size: 2rem;
  }

  .cs-stats {
    grid-template-columns: 1fr;
  }
}