/* =============================================================================
   STYLES
   Portfolio — Josh Turk
   ============================================================================= */

@import url('tokens.css');

/* =============================================================================
   RESET & BASE
   ============================================================================= */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-variation-settings: var(--font-variation);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.3rem;
}

ul {
  list-style: none;
}

ol > li {
list-style-type: numbers;
}

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


/* =============================================================================
   TEXT SELECTION COLOR
   ============================================================================= */
::selection {
  background: rgb(24 24 24 / 0.2);; /* WebKit/Blink Browsers */
}
::-moz-selection {
  background: rgb(24 24 24 / 0.2); /* Gecko Browsers */
}

/* =============================================================================
   LAYOUT UTILITIES
   ============================================================================= */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* =============================================================================
   SITE HEADER
   ============================================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-24) var(--space-32);
  background-color: var(--color-bg);
  border-bottom: var(--border);
  transition: background-color var(--transition-base),
              backdrop-filter var(--transition-base);
}

.site-header.is-scrolled {
  background-color: rgba(253, 247, 242, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo img {
  width: 1.1875rem;  /* 19px */
  height: 1.5rem;    /* 24px */
}

/* Navigation */
.site-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-40);
}

.nav-link {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-label);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* =============================================================================
   HERO SECTION
   ============================================================================= */

.hero {
  padding: var(--space-48) var(--space-32);
}

.hero__inner {
  padding-left: calc(var(--hero-indent) - var(--space-32));
  display: grid;
  grid-template-rows: 1fr auto;
  gap: var(--space-32);
  /* min-height: 16rem; */
}

.hero__title {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-hero);
  letter-spacing: var(--letter-spacing-hero);
  color: var(--color-text);
  max-width: 22ch;

  /* Initial animation state */
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

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

/* Rotating tagline */
.hero__rotating-wrap {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
}

.hero__rotating-text {
  display: block;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.4s ease;
}

.hero__rotating-text.is-exiting {
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.55, 0, 1, 0.45),
              opacity 0.22s ease-in;
}

.hero__rotating-text.is-entering {
  transform: translateY(100%);
  opacity: 0;
  transition: none !important;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-32);

  /* Initial animation state */
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
  transition-delay: 0.15s;
}

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

/* =============================================================================
   BUTTONS
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-12);
  padding: var(--space-20) var(--space-32);
  font-family: var(--font-family);
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-label);
  letter-spacing: var(--letter-spacing-button);
  text-transform: uppercase;
  font-variation-settings: var(--font-variation);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: var(--border);
  background: transparent;
  color: var(--color-text);
  transition: background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base);
}

.btn:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn__icon {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  width: 0.75rem;
  height: 1.25rem;
}

.btn__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Dark surface button variant */
.btn--on-dark {
  border-color: var(--color-text-on-dark);
  color: var(--color-text-on-dark);
}

.btn--on-dark:hover {
  background-color: var(--color-text-on-dark);
  color: var(--color-surface-dark);
}

/* =============================================================================
   CASE STUDIES
   ============================================================================= */

.case-studies {
  /* no extra padding — items handle their own borders/padding */
}

.case-study-item {
  border-top: var(--border);
  padding: var(--space-48) var(--space-32);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: background-color var(--transition-base),
              color var(--transition-base);
  cursor: pointer;

  /* Initial animation state */
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.5s ease,
              transform 0.5s ease,
              background-color var(--transition-base),
              color var(--transition-base);
}

.case-study-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.case-study-item:hover {
  background-color: var(--color-surface-dark);
  color: var(--color-text-on-dark);
}

/* Inner grid: [number] [content] [cta] */
.case-study__inner {
  display: grid;
  grid-template-columns: 1.125rem 1fr auto;
  gap: var(--space-64);
  align-items: end;
}

/* Item number */
.case-study__number {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-label);
  letter-spacing: var(--letter-spacing-button);
  color: var(--color-text-dim);
  align-self: start;
  padding-top: 0.125rem;
  transition: color var(--transition-base);
  white-space: nowrap;
}

.case-study-item:hover .case-study__number {
  color: rgba(253, 247, 242, 0.4);
}

/* Content block */
.case-study__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.case-study__title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-title);
  letter-spacing: var(--letter-spacing-title);
  color: inherit;
}
.case-study__title a {
  color: inherit;
  text-decoration: none;
}

.case-study__client {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-label);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
  color: inherit;
}

.case-study__desc {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-light);
  line-height: var(--line-height-body);
  color: inherit;
  max-width: 62ch;
}

/* CTA column */
.case-study__cta {
  display: flex;
  align-items: flex-end;
  align-self: stretch;
}

/* Border inversion on hover */
.case-study-item:hover .btn {
  border-color: var(--color-text-on-dark);
  color: var(--color-text-on-dark);
}

.case-study-item:hover .btn:hover {
  background-color: var(--color-text-on-dark);
  color: var(--color-surface-dark);
}

/* =============================================================================
   JUST FOR FUN
   ============================================================================= */

.fun-links {
  border-top: var(--border);
  padding: var(--space-32) var(--space-32) var(--space-48);
}

.fun-links__header {
  margin-bottom: var(--space-16);
}

.fun-links__label {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-label);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.fun-links__list {
  display: flex;
  flex-direction: column;
}

.fun-links__item {
  /* border-top: 1px solid rgba(24, 24, 24, 0.12); */

  /* Initial animation state */
  opacity: 0;
  transform: translateY(0.75rem);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.fun-links__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-32);
  padding: var(--space-12) 0;
  text-decoration: none;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.fun-links__link:hover {
  color: var(--color-text-muted);
}

.fun-links__title {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
}

.fun-links__tag {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.fun-links__link:hover .fun-links__tag {
  color: inherit;
}

@media (max-width: 600px) {
  .fun-links {
    padding: var(--space-24) var(--space-24) var(--space-40);
  }

  .fun-links__link {
    flex-direction: column;
    gap: var(--space-8);
  }
}

/* =============================================================================
   RESPONSIVE
   ============================================================================= */

/* Tablet — reduce hero indent, stack hero actions */
@media (max-width: 900px) {
  .hero__inner {
    padding-left: 0;
  }

  .case-study__inner {
    grid-template-columns: 1.125rem 1fr;
    gap: var(--space-32);
  }

  .case-study__cta {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    margin-top: var(--space-8);
  }
}

/* Mobile */
@media (max-width: 600px) {
  .site-header {
    padding: var(--space-20) var(--space-24);
  }

  .site-nav ul {
    gap: var(--space-24);
  }

  .hero {
    padding: var(--space-32) var(--space-24);
  }

  .hero__inner {
    gap: 0;
    min-height: auto;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-16);
    display: none; /* hide hero actions on mobile for cleaner look */
  }

  .case-study-item {
    padding: var(--space-32) var(--space-24);
  }

  .case-study__inner {
    grid-template-columns: 1.125rem 1fr;
    gap: var(--space-24);
  }

  .case-study__cta {
    grid-column: 2;
    grid-row: 2;
  }
}

/* Ensure max line length for body readability */
@media (min-width: 1400px) {
  .case-study__desc {
    max-width: 55ch;
  }
}

/* =============================================================================
   ABOUT PAGE
   ============================================================================= */

/* --- Hero --- */
.about-hero {
  background-color: rgba(24, 24, 24, 0.05);
  border-bottom: var(--border);
  padding-top: var(--space-32);
  overflow: hidden;
}

.about-hero__inner {
  display: grid;
  grid-template-columns: var(--margin-col) 1.5fr 1fr var(--margin-col);
  column-gap: var(--space-32);
  align-items: center;
}

.about-hero__text {
  grid-column: 2;
  padding-bottom: var(--space-48);

  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.about-hero__bio {
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-medium);
  line-height: 1.3;
  letter-spacing: clamp(-0.5px, calc(-0.094px - 0.028vw), -0.2px); /* -0.2px → -0.5px */
  color: var(--color-text);
}

.about-hero__photo {
  grid-column: 3;
  display: flex;
  justify-content: flex-end;
  align-self: end;

  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  transition-delay: 0.15s;
}

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

.about-hero__img {
  width: 100%;
  max-width: 460px;
  display: block;
  mix-blend-mode: multiply;
}

/* --- Content section --- */
.about-content {
  display: grid;
  grid-template-columns: var(--margin-col) minmax(0, 1fr) var(--margin-col);
  column-gap: var(--space-32);
  row-gap: var(--space-32);
  padding: var(--space-48) 0 var(--space-96) 0;

  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.about-content > * {
  grid-column: 2;
}

.about-section-heading {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-h3);
  color: var(--color-text);
}

.about-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-32);
  row-gap: var(--space-16);
}

.about-col__heading {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: var(--space-16);
}

.about-col__body {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-text);
}

.about-col__body p + p {
  margin-top: var(--space-16);
}

/* --- About responsive --- */
@media (max-width: 1100px) {
  .about-content {
    grid-template-columns: var(--space-48) minmax(0, 1fr) var(--space-48);
  }

  .about-hero__inner {
    grid-template-columns: var(--space-48) 1fr 1fr var(--space-48);
  }
}

@media (max-width: 900px) {
  .about-hero__inner {
    grid-template-columns: var(--space-32) 1.5fr 1fr var(--space-32);
  }

  .about-content {
    grid-template-columns: 0 minmax(0, 1fr) 0;
  }
}

@media (max-width: 768px) {
  .about-row {
    grid-template-columns: 1fr;
    row-gap: var(--space-32);
  }

    .about-hero__inner {
    grid-template-columns: 0 1fr 0;
  }

  .about-hero__photo {
    display: none;
  }
}

@media (max-width: 600px) {
  .about-hero__inner {
    grid-template-columns: 0 1fr 0;
  }

  .about-hero__text {
    grid-column: 2;
    padding-bottom: var(--space-32);
  }

  .about-hero__photo {
    display: none;
  }

  .about-content {
    grid-template-columns: 0 minmax(0, 1fr) 0;
    padding: var(--space-32) 0;
  }
}

/* =============================================================================
   CASE STUDY PAGE
   ============================================================================= */

/*
  Layout system:
  - .cs-block          → 3-col grid: [--margin-col] [content] [--margin-col]
  - .cs-block--split   → 4-col grid: [--margin-col] [2fr] [1fr] [--margin-col]
  - .cs-block--wide    → content with --space-88 padding (for image sections)
  All blocks get border-top + vertical padding.
*/

/* Base block */
.cs-block {
  display: grid;
  grid-template-columns: var(--margin-col) minmax(0, 1fr) var(--margin-col);
  column-gap: var(--space-32);
  padding: var(--space-40) 0;
  /*border-top: var(--border);*/
}

/* Place direct children in the content column by default */
.cs-block > * {
  grid-column: 2;
}

/* Split block: summary left, details right */
.cs-block--split {
  grid-template-columns: var(--margin-col) minmax(0, 2fr) minmax(0, 1fr) var(--margin-col);
}

.cs-block--split > .cs-summary {
  grid-column: 2;
}

.cs-block--split > .cs-details {
  grid-column: 3;
}

/* Image block: wider padding, no margin columns */
.cs-block--wide {
  display: block;
  padding: var(--space-48) var(--space-88);
  /*border-top: var(--border);*/
}

/* No top border on first block after header */
.cs-intro {
  border-top: none;
}

/* =============================================================================
   CASE STUDY — INTRO
   ============================================================================= */

/* Project name above the title */
.cs-project-name {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: var(--space-32);
}

/* Intro title block: spans content column */
.cs-intro-header {
  display: grid;
  grid-template-columns: var(--margin-col) minmax(0, 1fr) var(--margin-col);
  column-gap: var(--space-32);
  padding: var(--space-64) 0 var(--space-48);
}

.cs-intro-header > * {
  grid-column: 2;
}

.cs-page-title {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-hero);
  letter-spacing: var(--letter-spacing-hero);
  color: var(--color-text);

  /* Entrance animation */
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.cs-page-title.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Summary + details meta block */
.cs-summary {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-text);

  background-color: var(--color-surface-subtle);
  padding: var(--space-24);
  border-radius: var(--radius-card);
}

.cs-summary-heading {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: var(--space-16);
}

.cs-summary p + p {
  margin-top: var(--space-16);
}

.cs-details {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-text);
}

.cs-details p + p {
  margin-top: var(--space-8);
}

/* =============================================================================
   CASE STUDY — TEXT SECTIONS
   ============================================================================= */

.cs-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
  max-width: var(--content-max);
}

.cs-text h2{
  font-size: var(--font-size-h2);
}

.cs-section-heading {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-h3);
  color: var(--color-text);
}

.cs-section-sub-heading {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-h4);
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.cs-body {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-text);
}

.cs-body h4 {
  margin-bottom: var(--space-8);
}

.cs-body p + p {
  margin-top: var(--space-16);
}

.cs-body ul {
  list-style: disc;
  padding-left: 1.5em;
  margin-top: var(--space-16);
  margin-bottom: var(--space-24);
}

.cs-body ol {
  list-style: numbers;
  list-style-position: inside;
  padding-left: 1.5em;
  margin-top: var(--space-16);
  margin-bottom: var(--space-16);
}


.cs-body li + li {
  margin-top: var(--space-8);
}

/* ── Callout Block ── */
.cs-callout {
  background: var(--color-surface-subtle);
  border-radius: var(--radius-card);
  padding: var(--space-24);
  margin: var(--space-32) 0 var(--space-32) 0;
  max-width: var(--content-max);
}

/* ── Stats Row ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.stat-card {
  background: var(--color-surface-subtle);
  border-radius: var(--radius-card);
  padding: var(--space-24);
  text-align: center;
  transition: transform 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-3px);
}

.stat-number {
  font-size: var(--font-size-display);
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.stat-label {
  font-size: var(--font-size-body-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-label);
}

/* ── Assumption Cards ── */
.assumption-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  /* margin: var(--space-32) 0; */
}

@media (max-width: 600px) {
  .assumption-grid {
    grid-template-columns: 1fr;
  }
}

.assumption-card {
  background: var(--color-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: var(--space-24);
  transition: transform 0.2s ease;
}

.assumption-card:hover {
  transform: translateY(-3px);
}

.assumption-card .tag {
  display: inline-block;
  font-size: 10px;
  font-weight: var(--font-weight-700, 700);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px var(--space-8);
  border-radius: 8px;
  margin-bottom: var(--space-16);
}

.tag-confirmed {
  background-color: var(--color-bg);
  color: #28914a;
}

.tag-somewhat-confirmed {
  background-color: var(--color-bg);
  color: #5484D0;
}

.tag-uncertain {
  background-color: var(--color-bg);
  color: var(--color-text-muted);
}

.tag-contradicted {
  background-color: var(--color-bg);
  color: var(--color-red-300, #b81c0b);
}

.assumption-card h4 {
  font-size: var(--font-size-body-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.assumption-card p {
  font-size: var(--font-size-body-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
}


/* =============================================================================
   CASE STUDY — 2-COLUMN ROWS (headwinds-style tables)
   ============================================================================= */

.cs-2col-table {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
  width: 100%;
}

.cs-2col-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-32);
  row-gap: var(--space-16);
}

.cs-2col-row__heading {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-body);
  color: var(--color-text);
}

.cs-2col-row__body {
  font-size: var(--font-size-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-text);
  grid-row: 2;
}

/* =============================================================================
   CASE STUDY — IMAGES
   ============================================================================= */

.cs-image-full {
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--color-surface-subtle);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.cs-image-full img {
  max-width: 100%;
  height: auto;
  display: block;
}

.cs-image-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  /* margin-top: var(--space-32); */
}

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

.cs-image-card {
  width: 100%;
  height: fit-content;
  object-fit: cover;
  overflow: hidden;
  padding: var(--space-16);
  background-color: var(--color-surface-subtle);
  border-radius: var(--radius-card);
}

.cs-image-card img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.cs-image-card figcaption {
  font-size: var(--font-size-body-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-label);
  margin-top: var(--space-16);
  text-align: left;
}

/* Scroll fade-in for content blocks */
.cs-block,
.cs-block--wide,
.cs-intro-header {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.cs-block.is-visible,
.cs-block--wide.is-visible,
.cs-intro-header.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================================================
   CASE STUDY — RESPONSIVE
   ============================================================================= */

@media (max-width: 1100px) {
  .cs-block,
  .cs-intro-header {
    grid-template-columns: var(--space-48) minmax(0, 1fr) var(--space-48);
  }

  .cs-block--split {
    grid-template-columns: var(--space-48) minmax(0, 2fr) minmax(0, 1fr) var(--space-48);
  }

  .cs-block--wide {
    padding-left: var(--space-48);
    padding-right: var(--space-48);
  }
}

@media (max-width: 768px) {
  .cs-block,
  .cs-intro-header {
    grid-template-columns: 0 minmax(0, 1fr) 0;
  }

  /* Stack split layout on tablet */
  .cs-block--split {
    grid-template-columns: 0 minmax(0, 1fr) 0;
    row-gap: var(--space-32);
  }

  .cs-block--split > .cs-summary,
  .cs-block--split > .cs-details {
    grid-column: 2;
  }

  .cs-block--wide {
    padding-left: var(--space-32);
    padding-right: var(--space-32);
  }

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

  .cs-2col-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .cs-intro-header {
    padding-top: var(--space-40);
    padding-bottom: var(--space-40);
  }
  
  .cs-block {
    padding: var(--space-24) 0;
  }
  
  .cs-block--wide {
    padding: var(--space-24) var(--space-24);
  }

  .cs-image-grid {
    margin-top: var(--space-24);
  }  

  .cs-image-full, .cs-image-card {
    border-radius: var(--radius-card-sm);
  }
}