/* =========================================================
   CASE STUDY MODAL — NEO-BRUTALIST TECHNICAL DRAWER
   Thick outlines, hard shadows, crisp typography, no blurs.
   Full light/dark theme harmony, deep engineering deep-dive.
   ========================================================= */

.cs-modal {
  position: fixed;
  inset: 0;
  z-index: 99990;
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s cubic-bezier(0.2, 0, 0, 1), visibility 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.cs-modal.is-open {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
}

.cs-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.82);
  backdrop-filter: blur(2px);
  cursor: pointer;
}

.cs-modal__container {
  position: relative;
  width: 100%;
  max-width: 1100px;
  height: 100vh;
  background: var(--color-paper);
  border-left: var(--border-thick);
  box-shadow: -14px 0 0 var(--color-ink);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.2, 0, 0, 1);
  padding: var(--space-8) var(--space-10) var(--space-12);
  z-index: 99995;
}

.cs-modal.is-open .cs-modal__container {
  transform: translateX(0);
}

/* Close Button — Sticky top-right neo-brutalist trigger */
.cs-modal__close {
  position: sticky;
  top: 0;
  align-self: flex-end;
  margin-bottom: var(--space-4);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 18px;
  background: var(--color-white);
  border: var(--border-brutal);
  box-shadow: var(--shadow-xs);
  color: var(--color-ink);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-small);
  font-weight: var(--weight-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  z-index: 50;
}

.cs-modal__close:hover {
  background: var(--color-vermilion);
  color: #FFFFFF;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-sm);
}

.cs-modal__close:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--color-ink);
}

/* Header */
.cs-header {
  padding-bottom: var(--space-8);
  border-bottom: var(--border-thick);
  margin-bottom: var(--space-8);
  position: relative;
}

/* Hero Media / Poster */
.cs-hero-media {
  width: 100%;
  border: var(--border-thick);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-8);
  overflow: hidden;
  background: #111111;
  position: relative;
}

.cs-hero-media img {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.cs-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-4);
}

.cs-header__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: var(--weight-black);
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.cs-header__tagline {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--color-vermilion);
  font-weight: var(--weight-bold);
  line-height: 1.35;
  margin: 0;
}

/* Two-Column Grid */
.cs-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: var(--space-8);
  align-items: start;
}

.cs-col--main {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.cs-col--sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: sticky;
  top: 60px;
}

/* Section Block */
.cs-section {
  display: flex;
  flex-direction: column;
}

.cs-section__title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: var(--weight-black);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-ink);
  margin-bottom: var(--space-4);
}

.cs-text {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.68;
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-4);
}

/* Cards */
.cs-card {
  background: var(--color-white);
  border: var(--border-brutal);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cs-card--problem {
  border-left: 6px solid var(--color-vermilion);
  background: var(--color-paper-light);
  margin-top: var(--space-2);
}

.cs-card--highlight {
  border-left: 6px solid var(--color-lime);
  background: var(--color-paper-light);
}

.cs-card--actions {
  background: var(--color-white);
}

.cs-card__title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: var(--weight-black);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cs-card__text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-ink-soft);
  margin: 0;
}

.cs-card__text--dim {
  color: var(--color-ink-muted);
  font-size: 0.9rem;
}

/* Architecture Data Flow Box */
.cs-arch-box {
  background: #0E0E0E;
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
  color: var(--color-lime);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-top: var(--space-2);
  overflow-x: auto;
}

.cs-arch-header {
  font-weight: var(--weight-black);
  letter-spacing: 0.1em;
  color: #F5F0E8;
  border-bottom: 1.5px dashed var(--color-lime);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cs-arch-diagram {
  white-space: pre-wrap;
  word-break: break-word;
}

/* Challenges List */
.cs-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cs-list--challenges li {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-ink-soft);
  background: var(--color-white);
  border: var(--border-brutal);
  box-shadow: var(--shadow-xs);
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.cs-bullet {
  flex-shrink: 0;
}

/* Tech Pills */
.cs-pills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.cs-pill {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: var(--weight-bold);
  background: var(--color-paper);
  color: var(--color-ink);
  border: 1.5px solid var(--color-ink);
  padding: 4px 10px;
  box-shadow: 2px 2px 0 var(--color-ink);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Action Buttons Group */
.cs-actions-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

/* Modal Footer Navigation */
.cs-modal__footer {
  border-top: var(--border-thick);
  padding-top: var(--space-8);
  margin-top: var(--space-12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.cs-modal__nav-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-white);
  border: var(--border-brutal);
  box-shadow: var(--shadow-sm);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  color: var(--color-ink);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.cs-modal__nav-btn:hover {
  background: var(--color-lime);
  color: #111111;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
}

.cs-modal__nav-btn:hover .cs-modal__nav-sub,
.cs-modal__nav-btn:hover .cs-modal__nav-title {
  color: #111111;
}

.cs-modal__nav-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--color-ink);
}

.cs-modal__nav-text {
  display: flex;
  flex-direction: column;
}

.cs-modal__nav-sub {
  font-size: 0.72rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.cs-modal__nav-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: var(--weight-black);
  text-transform: uppercase;
  color: var(--color-ink);
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* =========================================================
   DARK THEME REFINEMENTS FOR CASE STUDY MODAL
   ========================================================= */
[data-theme="dark"] .cs-modal__container {
  background: var(--color-paper);
  border-left: var(--border-thick);
  box-shadow: -14px 0 0 #F5F0E8;
}

[data-theme="dark"] .cs-hero-media {
  border-color: #F5F0E8;
  box-shadow: 6px 6px 0 #F5F0E8;
}

[data-theme="dark"] .cs-arch-box {
  background: #080808;
  border-color: #F5F0E8;
  box-shadow: 4px 4px 0 #F5F0E8;
}

[data-theme="dark"] .cs-card--problem {
  background: #1F1816;
  border-left-color: var(--color-vermilion);
}

[data-theme="dark"] .cs-card--highlight {
  background: #181F14;
  border-left-color: var(--color-lime);
}

[data-theme="dark"] .cs-pill {
  background: #1A1A1A;
  color: #F5F0E8;
  border-color: #F5F0E8;
  box-shadow: 2px 2px 0 #F5F0E8;
}

[data-theme="dark"] .cs-modal__nav-btn:hover {
  background: var(--color-lime);
  color: #111111;
}

[data-theme="dark"] .cs-modal__nav-btn:hover .cs-modal__nav-sub,
[data-theme="dark"] .cs-modal__nav-btn:hover .cs-modal__nav-title {
  color: #111111;
}

[data-theme="dark"] .cs-header__meta .sticker--lime,
[data-theme="dark"] .cs-header__meta .sticker--lime * {
  background: var(--color-lime) !important;
  color: #111111 !important;
}

[data-theme="dark"] .cs-pill:hover {
  background: var(--color-lime) !important;
  color: #111111 !important;
  border-color: var(--color-lime) !important;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .cs-modal__container {
    padding: var(--space-6) var(--space-5) var(--space-8);
  }
  .cs-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .cs-col--sidebar {
    position: static;
  }
  .cs-modal__footer {
    flex-direction: column;
    align-items: stretch;
  }
  .cs-modal__nav-btn {
    justify-content: space-between;
  }
}