@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── TOKENS — matched to changeis.io ── */
:root {
  --navy:   #0F2D52;
  --blue:   #1A5F9C;
  --steel:  #2E7BC4;
  --sky:    #D6E8F7;
  --mist:   #EEF5FC;
  --body:   #1E1E2E;
  --mid:    #4A5568;
  --light:  #8FA8C0;
  --white:  #FFFFFF;
  --rule:   #B8D4EE;
  --serif:  'Inter', sans-serif;
  --sans:   'Inter', system-ui, sans-serif;
  /* legacy aliases kept for card/table elements */
  --ink:    #0F2D52;
  --brand:  #1A5F9C;
  --accent: #2E7BC4;
  --frost:  rgba(238, 245, 252, 0.96);
  --frost2: rgba(255,255,255,0.12);
  --muted:  rgba(255,255,255,0.65);
  --green:     #1a8f5c;
  --green-bg:  rgba(26,143,92,0.18);
}

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

/* ── BODY ── */
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background-color: #0A1628;
  background-image: url('./background.webp');
  background-image: -webkit-image-set(url('./background.webp') 1x);
  background-image: image-set(url('./background.webp') 1x, url('./background.png') 1x);
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  color: var(--body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── NAV — fixed, matches changeis.io exactly ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 3rem;
  height: 64px;
  background: rgba(10, 22, 40, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(184, 212, 238, 0.15);
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.4rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.nav-logo span { color: var(--sky); }

.nav-center {
  font-size: 0.78rem;
  font-weight: 500;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.04em;
  text-align: center;
  flex: 1;
  padding: 0 2rem;
}

.nav-center a {
  color: var(--sky);
  text-decoration: none;
}

.nav-center a:hover { text-decoration: underline; }

.nav-links {
  display: flex; gap: 2.5rem;
  list-style: none;
  flex-shrink: 0;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--sky); }

/* ── PAGE WRAPPER — push content below fixed nav ── */
.page-wrap {
  padding-top: 64px;
}

/* ── PAGE HEADER ── */
.page-header {
  padding: 3.5rem 3rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.page-starry {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 0.6rem;
}

.page-starry a {
  color: var(--sky);
  text-decoration: none;
}

.page-starry a:hover { text-decoration: underline; }

.page-eyebrow { display: none; }

.page-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ── CONTENT WIDTH ── */
.filter-strip, main {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  padding-left: 3rem;
  padding-right: 3rem;
  box-sizing: border-box;
}

/* ── FILTER STRIP ── */
.filter-strip { padding-top: 2rem; padding-bottom: 1rem; }

.filter-strip-inner {
  background: rgba(10, 22, 40, 0.72);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(184, 212, 238, 0.15);
  border-radius: 12px;
  overflow: hidden;
}

/* ── FILTER TABLE ── */
.filter-table {
  width: 100%;
  border-collapse: collapse;
}

.filter-table td {
  padding: 0.65rem 1.25rem;
  vertical-align: middle;
  border-bottom: 1px solid rgba(184, 212, 238, 0.08);
}

.filter-table tr:last-of-type td {
  border-bottom: none;
}

.filter-table .filter-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  white-space: nowrap;
  width: 110px;
  padding-right: 0.5rem;
  border-right: 1px solid rgba(184, 212, 238, 0.1);
}

.filter-table .filter-chips {
  padding-left: 1rem;
}

.chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  background: var(--frost2);
  color: var(--white);
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(184, 212, 238, 0.2);
  font-size: 0.97rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--sans);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.chip:hover {
  background: rgba(214, 232, 247, 0.18);
  border-color: rgba(184, 212, 238, 0.4);
}

.chip[aria-pressed="true"] {
  background: rgba(46, 123, 196, 0.25);
  border-color: var(--steel);
  color: var(--sky);
}

.filter-clear-row td {
  text-align: center;
  padding: 0.75rem 1.25rem;
  border-top: 1px solid rgba(184, 212, 238, 0.08);
}

.clear-btn {
  background: none;
  border: 1px solid rgba(184, 212, 238, 0.2);
  color: var(--muted);
  padding: 6px 20px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--sans);
  transition: all 0.15s;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.clear-btn:hover {
  border-color: rgba(184, 212, 238, 0.4);
  color: var(--white);
}

/* ── CARD GRID ── */
main { padding-top: 0.75rem; padding-bottom: 1.5rem; }

.carousel-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 900px) { .carousel-track { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .carousel-track { grid-template-columns: 1fr; } }

.tile {
  background: rgba(238, 245, 252, 0.95);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  backdrop-filter: blur(6px);
  text-decoration: none;
  color: inherit;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s;
  border-left: 4px solid var(--steel);
  min-height: 148px;
  cursor: pointer;
}

.tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 30px 70px rgba(0,0,0,0.45);
  background: rgba(255, 255, 255, 0.98);
}

.tile.hidden { display: none !important; }

.tile-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light);
}

.tile-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
}

.tile-tagline {
  font-size: 0.875rem;
  color: var(--mid);
  line-height: 1.45;
  flex: 1;
}

.tile-tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 4px; }

.tile-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(26,95,156,0.12);
  color: var(--blue);
}

/* ── PAGINATION ── */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 1.25rem 0 0.5rem;
}

.carousel-btn {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(184, 212, 238, 0.2);
  color: var(--white);
  width: 44px;
  height: 44px;
  border-radius: 8px;
  font-size: 0px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  position: relative;
}

.carousel-btn#btn-prev::after {
  content: '';
  display: block;
  width: 0; height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-right: 12px solid var(--white);
}

.carousel-btn#btn-next::after {
  content: '';
  display: block;
  width: 0; height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 12px solid var(--white);
}

.carousel-btn:hover:not(:disabled) { background: rgba(46, 123, 196, 0.3); border-color: var(--steel); }
.carousel-btn:disabled { opacity: 0.45; cursor: default; }
.carousel-btn:disabled::after { border-right-color: rgba(255,255,255,0.4); border-left-color: rgba(255,255,255,0.4); }

.carousel-info {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  min-width: 80px;
  text-align: center;
  letter-spacing: 0.04em;
}

.no-results {
  display: none;
  text-align: center;
  color: var(--muted);
  padding: 3rem;
  font-size: 0.95rem;
  grid-column: 1/-1;
}

/* ── FOOTER ── */
footer {
  background: #080F1A;
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(184, 212, 238, 0.08);
  margin-top: 2rem;
}

.footer-links { display: flex; gap: 2rem; }

.footer-link {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.footer-link:hover { color: var(--sky); }

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.2);
}

/* ── LOADING STATE ── */
.loading {
  text-align: center;
  color: var(--muted);
  padding: 4rem;
  font-size: 0.95rem;
  grid-column: 1/-1;
}

/* ── CASE STUDY FULL PAGE ── */
.cs-container {
  max-width: 860px;
  margin: 2rem auto;
  padding: 0 3rem 3rem;
}

.cs-card {
  background: rgba(238, 245, 252, 0.96);
  border-radius: 12px;
  padding: 2.5rem;
  border-left: 5px solid var(--steel);
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
}

.cs-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(15, 45, 82, 0.15);
}

.cs-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light);
  margin-bottom: 6px;
}

.cs-name {
  font-size: 2rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.1;
  margin-bottom: 6px;
}

.cs-tagline {
  font-size: 0.9375rem;
  color: var(--mid);
  line-height: 1.45;
}

.cs-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.cs-meta-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(26,95,156,0.12);
  color: var(--blue);
}

/* ── STARRY TABLE ── */
table { width: 100%; border-collapse: collapse; }

th, td {
  text-align: left;
  vertical-align: top;
  padding: 1rem;
  border-bottom: 1px solid rgba(184, 212, 238, 0.4);
}

th {
  width: 22%;
  background: rgba(15, 45, 82, 0.07);
  border-right: 2px solid rgba(15, 45, 82, 0.12);
  color: var(--navy);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.starry-letter {
  font-size: 1.4em;
  font-weight: 900;
  color: var(--steel);
  margin-right: 4px;
  display: inline-block;
}

td ul { padding-left: 1.2rem; }
td ul li { margin-bottom: 0.4rem; line-height: 1.55; color: var(--body); }
td p { line-height: 1.65; color: var(--body); }

.cs-stub {
  color: var(--light);
  font-style: italic;
  font-size: 0.875rem;
}

/* ── CS NAV ── */
.cs-nav {
  text-align: center;
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 12px;
}

.cs-nav a {
  display: inline-block;
  background: var(--navy);
  color: var(--white);
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  transition: background 0.2s;
}

.cs-nav a:hover { background: var(--steel); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  nav { padding: 0 1.5rem; }
  .nav-links { gap: 1.5rem; }
  .page-header { padding: 2.5rem 1.5rem 1rem; }
  .filter-strip, main { padding-left: 1.5rem; padding-right: 1.5rem; }
  footer { padding: 1.5rem; flex-direction: column; gap: 0.75rem; text-align: center; }
  .cs-container { padding: 0 1.5rem 2rem; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .page-header { padding: 2rem 1rem 1rem; }
  .filter-strip, main { padding-left: 1rem; padding-right: 1rem; }
  .cs-card { padding: 1.25rem; }
  th, td { display: block; width: 100%; }
  th { border-bottom: none; padding-bottom: 0.3rem; border-right: none; border-left: 3px solid var(--steel); }
  td { padding-top: 0.3rem; }
  footer { padding: 1.25rem 1rem; }
}