/* =====================
   TOKENS
   ===================== */
:root {
  --bg:      #f9f9f7;
  --surface: #ffffff;
  --border:  #e4e4e0;
  --text:    #111110;
  --muted:   #6f6f6b;
  --subtle:  #a8a8a4;
  --accent:  #a07040;
  --radius:  10px;
  --max-w:   860px;
  --font-display: 'Playfair Display', Georgia, serif;
  --font:    'DM Sans', system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #111110;
    --surface: #1a1a18;
    --border:  #2a2a27;
    --text:    #f0f0ed;
    --muted:   #9a9a95;
    --subtle:  #5a5a56;
    --accent:  #c89050;
  }
}

/* =====================
   READING PROGRESS BAR
   ===================== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 200;
  overflow: hidden;
  background: transparent;
}

.progress-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform-origin: left;
  transform: scaleX(var(--p, 0));
}

/* =====================
   HERO STAGGER ANIMATIONS
   ===================== */
@keyframes cs-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}
@keyframes cs-blur-up {
  from { opacity: 0; transform: translateY(14px); filter: blur(8px); }
  to   { opacity: 1; transform: none; filter: blur(0); }
}
@keyframes cs-scale-in {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: no-preference) {
  .cs-num          { animation: cs-up       0.55s cubic-bezier(0.16,1,0.3,1) 0.00s both; }
  .cs-title        { animation: cs-blur-up  0.90s cubic-bezier(0.16,1,0.3,1) 0.10s both; }
  .cs-project-img  { animation: cs-scale-in 0.80s cubic-bezier(0.16,1,0.3,1) 0.35s both; }
  .cs-meta         { animation: cs-up       0.55s cubic-bezier(0.16,1,0.3,1) 0.55s both; }
}

/* =====================
   VIEW TRANSITIONS
   ===================== */
@view-transition { navigation: auto; }

@keyframes vt-exit {
  to { opacity: 0; transform: translateY(-10px) scale(0.98); }
}
@keyframes vt-enter {
  from { opacity: 0; transform: translateY(18px); }
}

::view-transition-old(root) {
  animation: 260ms cubic-bezier(0.4, 0, 1, 1) both vt-exit;
}
::view-transition-new(root) {
  animation: 520ms cubic-bezier(0.16, 1, 0.3, 1) both vt-enter;
}

/* =====================
   PAGE CURTAIN (non-VT entry reveal)
   ===================== */
.cs-curtain {
  position: fixed;
  inset: 0;
  background: var(--text);
  z-index: 9000;
  pointer-events: none;
  transform-origin: top;
  transform: scaleY(1);
}

.cs-curtain--out {
  transform: scaleY(0);
  transition: transform 0.7s cubic-bezier(0.76, 0, 0.24, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

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

/* =====================
   CUSTOM CURSOR
   ===================== */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  background: var(--text);
}

.cursor-ring {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--text);
  opacity: 0.35;
  transition: width 0.2s ease, height 0.2s ease, opacity 0.2s ease;
}

body.cursor-hover .cursor-ring {
  width: 52px;
  height: 52px;
  opacity: 0.15;
}

/* =====================
   NAV
   ===================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1.25rem;
  background: var(--bg);
}

.nav.scrolled {
  border-bottom: 1px solid var(--border);
  background: rgba(249, 249, 247, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

@media (prefers-color-scheme: dark) {
  .nav.scrolled { background: rgba(17,17,16,0.92); }
}

.nav-back {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s;
}

.nav-back:hover { color: var(--text); }

.nav-logo {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

/* =====================
   HERO
   ===================== */
.cs-hero {
  padding: 3.5rem 1.5rem 0;
  border-bottom: 1px solid var(--border);
  max-width: var(--max-w);
  margin: 0 auto;
}

.cs-num {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-bottom: 1.1rem;
}

.cs-title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin-bottom: 2rem;
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  padding: 1.5rem 0 2.25rem;
  border-top: 1px solid var(--border);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.cs-meta-label {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--subtle);
}

.cs-meta-value {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.cs-meta-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: opacity 0.2s;
}

.cs-meta-link:hover { opacity: 0.7; }

/* =====================
   HERO IMAGE
   ===================== */
.cs-project-img {
  margin: 2rem 0;
}

.cs-project-img img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
}

/* =====================
   BODY
   ===================== */
.cs-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* =====================
   SECTIONS
   ===================== */
.cs-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

.cs-section:last-of-type {
  border-bottom: none;
  padding-bottom: 5rem;
}

.cs-section-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

/* Section h2 — thesis statement */
.cs-section > h2 {
  font-family: var(--font);
  font-size: clamp(1.08rem, 2.5vw, 1.3rem);
  font-weight: 500;
  line-height: 1.48;
  color: var(--text);
  margin-bottom: 1.5rem;
  max-width: 54ch;
  letter-spacing: -0.01em;
}

.cs-section > p.cs-body-text {
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

/* =====================
   SPLIT LAYOUT — text | image
   ===================== */
.cs-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 0;
}

.cs-split-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.cs-split-text h2 {
  font-family: var(--font);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 500;
  line-height: 1.48;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.cs-split-text p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.72;
}

.cs-split-visual img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
}

/* =====================
   STAT CALLOUT
   ===================== */
.cs-stat {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1.75rem 0 1.75rem;
}

.cs-stat-num {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 9vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--accent);
  line-height: 1;
}

.cs-stat-desc {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.45;
  max-width: 22ch;
}

.cs-stat-source {
  width: 100%;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-top: -0.5rem;
}

.cs-subtext {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 58ch;
  margin-top: 1.5rem;
}

/* =====================
   FEATURE LIST
   ===================== */
.cs-feature-list {
  list-style: none;
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cs-feature-list li {
  display: flex;
  gap: 0.85rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.72;
}

.cs-feature-list li::before {
  content: '—';
  color: var(--subtle);
  flex-shrink: 0;
  font-size: 0.85rem;
  padding-top: 0.08em;
}

/* =====================
   TAGS + LINKS
   ===================== */
.cs-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2.25rem;
}

.cs-tags li {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.28rem 0.75rem;
  border-radius: 4px;
}

.cs-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 2.25rem;
}

.cs-link-btn {
  display: inline-block;
  padding: 0.7rem 1.35rem;
  border: 1.5px solid var(--text);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  transition: background 0.2s, color 0.2s;
}

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

.cs-link-btn--ghost {
  border-color: var(--muted);
  color: var(--muted);
}

.cs-link-btn--ghost:hover {
  background: var(--muted);
  color: var(--bg);
}

/* =====================
   VERIFICATION PATHS (NAFDAC)
   ===================== */
.vp-list { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1.75rem; }

.vp-card {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 1.5rem; padding: 1.1rem 1.4rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.vp-card.vp-will-animate { opacity: 0; transform: translateY(10px); }
.vp-card.vp-in { opacity: 1; transform: none; }
.vp-verified { border-left: 3px solid #008751; }
.vp-notfound { border-left: 3px solid #CC0000; }
.vp-multiple  { border-left: 3px solid #B45309; }

.vp-body { flex: 1; min-width: 0; }
.vp-num  { display: block; margin-bottom: 0.28rem; font-size: 0.58rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--subtle); }
.vp-title { font-size: 0.9rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; line-height: 1.4; }
.vp-desc  { font-size: 0.82rem; color: var(--muted); line-height: 1.62; }

.vp-outcome { display: flex; flex-direction: column; align-items: flex-end; gap: 0.35rem; flex-shrink: 0; padding-top: 0.05rem; }
.vp-badge   { font-size: 0.62rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; padding: 0.22rem 0.7rem; border-radius: 99px; white-space: nowrap; color: #fff; }
.vp-badge--v  { background: #008751; }
.vp-badge--nf { background: #CC0000; }
.vp-badge--mm { background: #B45309; }
.vp-tag       { font-size: 0.63rem; font-style: italic; white-space: nowrap; }
.vp-tag--v    { color: #008751; }
.vp-tag--cl   { color: #a07040; }
.vp-tag--n    { color: var(--subtle); }

@media (max-width: 600px) {
  .vp-card    { flex-direction: column; gap: 0.65rem; }
  .vp-outcome { align-items: flex-start; flex-direction: row; flex-wrap: wrap; gap: 0.5rem; }
}

/* =====================
   TESTIMONIAL
   ===================== */
.cs-quote {
  margin: 0;
  padding: 2rem 2.25rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 8px 8px 0;
}

.cs-quote p {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-style: italic;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 1rem;
}

.cs-quote cite {
  font-size: 0.8rem;
  font-style: normal;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* =====================
   PROJECT NAV
   ===================== */
.cs-project-nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
}

.cs-project-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s;
}

.cs-project-nav a:hover { color: var(--text); }
.cs-project-nav .next { text-align: right; }

/* =====================
   FOOTER
   ===================== */
.footer {
  border-top: 1px solid var(--border);
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--subtle);
}

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

.footer-links a {
  font-size: 0.75rem;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--text); }

/* =====================
   FADE IN
   ===================== */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================
   TOUCH — hide cursor
   ===================== */
@media (hover: none) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* =====================
   MOBILE (max 600px)
   ===================== */
@media (max-width: 600px) {
  .cs-hero {
    padding: 2.25rem 1.25rem 0;
  }

  .cs-body {
    padding: 0 1.25rem;
  }

  .cs-section {
    padding: 2.75rem 0;
  }

  .cs-section:last-of-type {
    padding-bottom: 3.5rem;
  }

  .cs-section-label {
    margin-bottom: 1rem;
  }

  .cs-title {
    font-size: clamp(1.45rem, 6.5vw, 1.9rem);
    margin-bottom: 1.5rem;
  }

  .cs-stat-num {
    font-size: clamp(2.75rem, 12vw, 3.5rem);
  }

  .cs-meta {
    gap: 1rem 1.75rem;
    padding: 1.25rem 0 1.75rem;
  }

  .cs-project-nav {
    padding: 2rem 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .footer {
    padding: 1.5rem 1.25rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .cs-links {
    flex-direction: column;
    gap: 0.5rem;
  }

  .cs-link-btn {
    text-align: center;
  }

  .cs-feature-list {
    gap: 0.85rem;
  }

  .cs-subtext {
    font-size: 0.9rem;
  }
}

/* =====================
   DESKTOP (min 720px)
   ===================== */
@media (min-width: 720px) {
  .cs-hero {
    padding: 5.5rem 2.5rem 0;
  }

  .cs-body {
    padding: 0 2.5rem;
  }

  /* Two-column section layout: label left, content right */
  .cs-section {
    padding: 5.5rem 0;
    display: grid;
    grid-template-columns: 120px 1fr;
    column-gap: 4.5rem;
    align-items: start;
  }

  .cs-section-label {
    grid-column: 1;
    grid-row: 1 / span 50;
    align-self: start;
    position: sticky;
    top: 4.5rem;
    margin-bottom: 0;
  }

  .cs-section > *:not(.cs-section-label) {
    grid-column: 2;
  }

  .cs-section > h2 {
    font-size: 1.3rem;
    max-width: none;
  }

  .cs-split {
    grid-template-columns: 42% 1fr;
    gap: 3.5rem;
    align-items: center;
  }

  .cs-project-nav,
  .footer {
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
}