/* ============================================================
   BambooIQ — Main Stylesheet
   IBM Plex Sans · Charcoal on White · Teal accent
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;700&display=swap');

/* ── Variables ───────────────────────────────────────────── */
:root {
  --charcoal:    #1A1A1A;
  --teal:        #0F766E;
  --teal-hover:  #0c6560;
  --white:       #FFFFFF;
  --off-white:   #F7F7F7;
  --mid-grey:    #4A4A4A;
  --light-grey:  #8A8A8A;
  --faint-grey:  #E5E5E5;

  --font:        'IBM Plex Sans', sans-serif;

  --nav-h:       64px;
  --max-w:       1200px;
  --pad-x:       clamp(24px, 5vw, 80px);
  --section-gap: clamp(80px, 10vw, 128px);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--charcoal);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }

/* ── Layout helpers ──────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.section { padding: var(--section-gap) 0; }
.section + .section { border-top: 1px solid var(--faint-grey); }
.divider { border: none; border-top: 1px solid var(--faint-grey); }

/* ── Typography ──────────────────────────────────────────── */
.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--teal);
  flex-shrink: 0;
}

h1, h2, h3 { font-weight: 700; line-height: 1.15; color: var(--charcoal); }

.hero-headline {
  font-size: clamp(36px, 5.5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 820px;
}
.page-h1 {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 760px;
}
.section-h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.015em;
}
.body-copy {
  font-size: 17px;
  line-height: 1.65;
  color: var(--charcoal);
}
.supporting {
  font-size: 18px;
  line-height: 1.6;
  color: var(--mid-grey);
}
.meta {
  font-size: 13px;
  color: var(--light-grey);
}
.stat-num {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  color: var(--teal);
  line-height: 1;
}

/* ── Buttons & CTAs ──────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--teal);
  color: var(--white);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 24px;
  transition: background 0.18s;
}
.btn-primary:hover { background: var(--teal-hover); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--charcoal);
  font-size: 15px;
  font-weight: 500;
  border-bottom: 1px solid var(--charcoal);
  padding-bottom: 1px;
  transition: color 0.18s, border-color 0.18s;
}
.btn-secondary .arrow { color: var(--teal); }
.btn-secondary:hover { color: var(--teal); border-color: var(--teal); }

.cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 40px;
}

/* ── Navigation ──────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--faint-grey);
  height: var(--nav-h);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--charcoal);
  letter-spacing: -0.01em;
}
.nav-logo span { color: var(--teal); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  color: var(--mid-grey);
  transition: color 0.15s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--charcoal); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--charcoal);
  transition: 0.2s;
}

/* Mobile nav — rendered as sibling to .nav, not inside it */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 99;
  padding: 32px var(--pad-x);
  border-top: 1px solid var(--faint-grey);
  overflow-y: auto;
}
.nav-mobile.open { display: block; }
.nav-mobile ul { list-style: none; }
.nav-mobile ul li + li { border-top: 1px solid var(--faint-grey); }
.nav-mobile ul a {
  display: block;
  padding: 20px 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--charcoal);
  transition: color 0.15s;
}
.nav-mobile ul a:hover { color: var(--teal); }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--faint-grey);
  padding: 64px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p {
  margin-top: 12px;
  font-size: 14px;
  color: var(--mid-grey);
  max-width: 280px;
  line-height: 1.55;
}
.footer-col h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light-grey);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col ul li + li { margin-top: 10px; }
.footer-col ul a {
  font-size: 14px;
  color: var(--mid-grey);
  transition: color 0.15s;
}
.footer-col ul a:hover { color: var(--charcoal); }
.footer-copy {
  border-top: 1px solid var(--faint-grey);
  padding-top: 24px;
  font-size: 13px;
  color: var(--light-grey);
}

/* ── Work card grid ──────────────────────────────────────── */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 0;
}
.work-card {
  border: 1px solid var(--faint-grey);
  margin: -1px 0 0 -1px;
  padding: 36px;
  transition: background 0.15s;
}
.work-card:hover { background: var(--off-white); }
.work-card .card-tag {
  font-size: 12px;
  color: var(--teal);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.work-card h3 {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.work-card p {
  font-size: 15px;
  color: var(--mid-grey);
  line-height: 1.55;
  margin-bottom: 24px;
}
.read-case {
  font-size: 14px;
  font-weight: 500;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.15s;
}
.work-card:hover .read-case { gap: 8px; }

/* ── Filter pills ────────────────────────────────────────── */
.filter-group { margin-bottom: 10px; }
.filter-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light-grey);
  margin-bottom: 10px;
  display: block;
}
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 48px;
}
.pill {
  font-size: 13px;
  color: var(--mid-grey);
  border: 1px solid var(--faint-grey);
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.15s;
  background: none;
  font-family: var(--font);
}
.pill:hover, .pill.active {
  border-color: var(--charcoal);
  color: var(--charcoal);
}
.pill.active { background: var(--charcoal); color: var(--white); }

/* ── Impact stats panel ──────────────────────────────────── */
.stats-panel {
  background: var(--off-white);
  padding: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.stat-item p:not(.stat-num) {
  font-size: 14px;
  color: var(--mid-grey);
  margin-top: 8px;
  line-height: 1.4;
}

/* ── How we work steps ───────────────────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}
.step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--light-grey);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.step h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.step p {
  font-size: 16px;
  color: var(--mid-grey);
  line-height: 1.6;
}

/* ── Logo strip ──────────────────────────────────────────── */
.logo-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 40px;
}
.logo-strip-item {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--faint-grey);
  transition: color 0.2s;
}
.logo-strip-item:hover { color: var(--light-grey); }

/* ── Partner blocks ──────────────────────────────────────── */
.partner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.partner-card {}
.partner-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  display: block;
  border: 1px solid var(--faint-grey);
  margin-bottom: 20px;
}
.partner-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  display: block;
  border: 1px solid var(--faint-grey);
  margin-bottom: 20px;
}
.partner-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}
.partner-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}
.partner-bio {
  font-size: 15px;
  color: var(--mid-grey);
  line-height: 1.65;
}

/* ── Case study page ─────────────────────────────────────── */
.case-breadcrumb {
  font-size: 13px;
  color: var(--teal);
  margin-bottom: 32px;
}
.case-breadcrumb a { color: var(--teal); }
.case-breadcrumb a:hover { color: var(--charcoal); }
.case-tags {
  font-size: 13px;
  color: var(--light-grey);
  margin-bottom: 24px;
}
.case-body p { margin-bottom: 24px; }
.case-body p:last-child { margin-bottom: 0; }
.case-quote {
  border-left: 3px solid var(--teal);
  padding: 8px 0 8px 28px;
  margin: 40px 0;
  font-size: 18px;
  line-height: 1.55;
  color: var(--charcoal);
}
.case-quote cite {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--light-grey);
  font-style: normal;
}

/* ── Contact form ────────────────────────────────────────── */
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--mid-grey);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 16px;
  color: var(--charcoal);
  background: var(--white);
  border: 1px solid var(--faint-grey);
  padding: 14px 16px;
  outline: none;
  transition: border-color 0.15s;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--charcoal); }
.form-group textarea { min-height: 120px; }
.form-note {
  font-size: 13px;
  color: var(--light-grey);
  margin-top: 6px;
}

/* ── Principles list ─────────────────────────────────────── */
.principles-list {
  list-style: none;
}
.principles-list li {
  padding: 28px 0;
  border-bottom: 1px solid var(--faint-grey);
  font-size: clamp(18px, 2.5vw, 24px);
  color: var(--mid-grey);
  font-weight: 400;
  line-height: 1.4;
}
.principles-list li:first-child { border-top: 1px solid var(--faint-grey); }

/* ── Booking CTAs ────────────────────────────────────────── */
.booking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.booking-card {
  border: 1px solid var(--faint-grey);
  padding: 32px;
  transition: border-color 0.15s;
}
.booking-card:hover { border-color: var(--charcoal); }
.booking-card .meta { margin-bottom: 12px; }
.booking-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}
.booking-card p {
  font-size: 15px;
  color: var(--mid-grey);
  line-height: 1.55;
  margin-bottom: 20px;
}

/* ── AlphaIMS product page ───────────────────────────────── */
.feature-list {
  list-style: none;
  margin-top: 24px;
}
.feature-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--faint-grey);
  font-size: 16px;
  color: var(--mid-grey);
  display: flex;
  gap: 12px;
}
.feature-list li::before {
  content: '→';
  color: var(--teal);
  flex-shrink: 0;
}

.doc-links { list-style: none; }
.doc-links li { display: inline; }
.doc-links li + li::before { content: ' · '; color: var(--faint-grey); }
.doc-links a {
  font-size: 14px;
  color: var(--mid-grey);
  border-bottom: 1px solid var(--faint-grey);
  transition: color 0.15s, border-color 0.15s;
}
.doc-links a:hover { color: var(--charcoal); border-color: var(--charcoal); }

/* ── Hidden/filtered cards ───────────────────────────────── */
.work-card[hidden] { display: none; }

/* ── AlphaIMS components ─────────────────────────────────── */
.content-col { max-width: 720px; }

.stats-wrapper {
  max-width: 720px;
  margin-top: 20px;
}

.stats-footnote {
  font-size: 13px;
  color: var(--light-grey);
  margin-top: 12px;
}

.callout-box {
  border-left: 3px solid var(--teal);
  background: var(--off-white);
  padding: 20px 24px;
  margin-top: 24px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--mid-grey);
}

.diagram-figure {
  max-width: 720px;
  margin-top: 32px;
  margin-bottom: 0;
}

.diagram-caption {
  font-size: 11px;
  color: var(--light-grey);
  margin-top: 8px;
  margin-bottom: 0;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.example-wrap {
  max-width: 720px;
  margin-top: 28px;
  border: 1px solid var(--faint-grey);
}

.example-narrative {
  padding: 24px 28px;
  border-bottom: 1px solid var(--faint-grey);
}

.example-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 10px;
}

.example-narrative p {
  font-size: 15px;
  color: var(--mid-grey);
  line-height: 1.65;
}

.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.before-block {
  padding: 24px 28px;
  border-right: 1px solid var(--faint-grey);
  background: #F5F3EF;
}

.after-block {
  padding: 24px 28px;
  background: #F2FAF8;
}

.ba-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.before-block .ba-label { color: var(--mid-grey); }
.after-block .ba-label { color: var(--teal); }

.ba-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.before-block .ba-label::before { background: #9A8F82; }
.after-block .ba-label::before { background: var(--teal); }

.ba-list { list-style: none; }

.ba-list li {
  font-size: 14px;
  line-height: 1.55;
  padding: 8px 0;
  border-bottom: 1px solid #E0DDD8;
  color: #2A2A2A;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.after-block .ba-list li {
  border-bottom: 1px solid #C8E8E3;
  color: var(--charcoal);
}

.ba-list li:last-child { border-bottom: none; }
.ba-list li::before { flex-shrink: 0; margin-top: 1px; }
.before-block .ba-list li::before { content: '—'; color: #9A8F82; }
.after-block .ba-list li::before { content: '→'; color: var(--teal); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .steps-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats-panel { grid-template-columns: 1fr; padding: 32px 24px; }
  .partner-grid { grid-template-columns: 1fr; }
  .booking-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: 1fr; }
  .before-after { grid-template-columns: 1fr; }
  .before-block { border-right: none; border-bottom: 1px solid var(--faint-grey); }
  .example-narrative { padding: 20px; }
  .before-block, .after-block { padding: 20px; }
  .partner-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .cta-group { flex-direction: column; align-items: flex-start; }
  .footer-grid { gap: 32px; }
}