/* ============================================
   NEURABRIDGE.AI — Main Stylesheet
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,400&display=swap');

/* ============================================
   CSS VARIABLES
   ============================================ */

:root {
  --color-brand:        #1D9E75;
  --color-brand-light:  #E1F5EE;
  --color-brand-mid:    #0F6E56;
  --color-brand-dark:   #085041;

  --color-text-primary:   #1a1a18;
  --color-text-secondary: #5f5e5a;
  --color-text-tertiary:  #888780;

  --color-bg-primary:   #ffffff;
  --color-bg-secondary: #f7f6f2;
  --color-bg-tertiary:  #f1efe8;

  --color-border-light:  rgba(0,0,0,0.08);
  --color-border-mid:    rgba(0,0,0,0.14);
  --color-border-strong: rgba(0,0,0,0.22);

  --color-success-text: #0F6E56;
  --color-danger-text:  #A32D2D;

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'DM Sans', system-ui, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-pill: 100px;

  --max-width: 1120px;
  --nav-height: 68px;

  --transition: 0.2s ease;
}

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

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

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

body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: var(--font-sans);
  border: none;
  background: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.15;
}

h1 { font-size: clamp(36px, 5vw, 56px); }
h2 { font-size: clamp(26px, 3.5vw, 36px); }
h3 { font-size: clamp(20px, 2.5vw, 26px); }
h4 { font-size: 18px; }

p { line-height: 1.75; }

.serif { font-family: var(--font-serif); }
.italic { font-style: italic; }
.brand  { color: var(--color-brand); }

.eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 80px 0;
  border-bottom: 0.5px solid var(--color-border-light);
}

.section--alt {
  background: var(--color-bg-secondary);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
  gap: 24px;
}

.section-header__left .eyebrow {
  margin-bottom: 10px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  padding: 11px 24px;
  border-radius: var(--radius-pill);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-brand);
  color: #fff;
  border: 1px solid var(--color-brand);
}

.btn--primary:hover {
  background: var(--color-brand-mid);
  border-color: var(--color-brand-mid);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 0.5px solid var(--color-border-mid);
}

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

.btn--sm {
  font-size: 13px;
  padding: 8px 18px;
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--color-border-light);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* Only the 'bridge' span inside the wordmark text gets teal */
.nav__logo-text > span {
  color: var(--color-brand);
}

/* Prevent the old blanket .nav__logo span rule from making everything teal */
.nav__logo span {
  color: inherit;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__links a {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.nav__links a:hover {
  color: var(--color-text-primary);
}

.nav__cta {
  margin-left: 8px;
}

/* Mobile hamburger (hidden on desktop) */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text-primary);
  transition: all var(--transition);
}

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

.hero {
  padding: 96px 0 80px;
  border-bottom: 0.5px solid var(--color-border-light);
  overflow: hidden;
  position: relative;
}

/* Two-column grid layout */
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__text { min-width: 0; }

.hero__visual {
  border: 0.5px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-bg-secondary);
}

@media (max-width: 860px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero__visual { order: 1; } /* card BELOW text on mobile */
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
}

.hero__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-brand);
  flex-shrink: 0;
}

.hero__heading {
  max-width: 580px;
  margin-bottom: 24px;
}

.hero__sub {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 440px;
  margin-bottom: 40px;
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero__stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.hero__stat-num {
  font-family: var(--font-serif);
  font-size: 32px;
  display: block;
  line-height: 1;
  margin-bottom: 4px;
}

.hero__stat-label {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ============================================
   MANIFESTO SECTION
   ============================================ */

.manifesto {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.manifesto__quote {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.5vw, 28px);
  line-height: 1.45;
  border-left: 2px solid var(--color-brand);
  padding-left: 28px;
}

.manifesto__body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ============================================
   SERVICES / TIER CARDS
   ============================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 0.5px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  padding: 32px 28px;
  border-right: 0.5px solid var(--color-border-light);
  transition: background var(--transition);
}

.service-card:last-child {
  border-right: none;
}

.service-card:hover {
  background: var(--color-bg-secondary);
}

.service-card__num {
  font-family: var(--font-serif);
  font-size: 44px;
  color: var(--color-border-mid);
  line-height: 1;
  margin-bottom: 20px;
}

.service-card__tier {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: 8px;
}

.service-card__name {
  font-family: var(--font-serif);
  font-size: 26px;
  margin-bottom: 14px;
}

.service-card__desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-card__list li {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.check-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.check-dot::after {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-brand);
}

/* ============================================
   PHILOSOPHY CARDS
   ============================================ */

.phil-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.phil-card {
  background: var(--color-bg-primary);
  border: 0.5px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.phil-card:hover {
  border-color: var(--color-border-mid);
}

.phil-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--color-brand);
  font-size: 20px;
}

.phil-card__title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 10px;
  font-family: var(--font-sans);
}

.phil-card__desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* ============================================
   COMPARISON TABLE
   ============================================ */

.diff-table {
  width: 100%;
  border: 0.5px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.diff-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1.4fr;
  border-bottom: 0.5px solid var(--color-border-light);
}

.diff-row:last-child {
  border-bottom: none;
}

.diff-cell {
  padding: 16px 22px;
  font-size: 13px;
  border-right: 0.5px solid var(--color-border-light);
  line-height: 1.6;
}

.diff-cell:last-child {
  border-right: none;
}

.diff-row--header .diff-cell {
  background: var(--color-bg-secondary);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.diff-cell--dim   { color: var(--color-text-secondary); }
.diff-cell--bad   { color: var(--color-danger-text); }
.diff-cell--good  { color: var(--color-success-text); font-weight: 500; }

/* ============================================
   PROCESS STEPS
   ============================================ */

.process-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.process-step {
  padding: 28px 24px;
  border-right: 0.5px solid var(--color-border-light);
  position: relative;
}

.process-step:last-child {
  border-right: none;
}

.process-step__num {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-brand);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.process-step__title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 10px;
  font-family: var(--font-sans);
}

.process-step__desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* ============================================
   CTA SECTION
   ============================================ */

.cta-section {
  text-align: center;
  padding: 96px 0;
}

.cta-section h2 {
  max-width: 500px;
  margin: 0 auto 18px;
}

.cta-section p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 380px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  border-top: 0.5px solid var(--color-border-light);
  padding: 40px 0 32px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer__brand p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 12px;
  max-width: 220px;
  line-height: 1.7;
}

.footer__col-title {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--color-text-primary);
}

.footer__bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 0.5px solid var(--color-border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__bottom p {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* ============================================
   BADGE / TAG
   ============================================ */

.badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.badge--amber {
  background: #FAEEDA;
  color: #633806;
}

.badge--teal {
  background: var(--color-brand-light);
  color: var(--color-brand-dark);
}

/* ============================================
   MOBILE NAV DRAWER
   ============================================ */

.nav__mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg-primary);
  z-index: 200;
  flex-direction: column;
  padding: 32px;
}

.nav__mobile-menu.is-open {
  display: flex;
}

.nav__mobile-close {
  align-self: flex-end;
  font-size: 24px;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  margin-bottom: 32px;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.nav__mobile-links a {
  font-family: var(--font-serif);
  font-size: 28px;
  color: var(--color-text-primary);
}

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

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .manifesto {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    border-right: none;
    border-bottom: 0.5px solid var(--color-border-light);
  }

  .service-card:last-child {
    border-bottom: none;
  }

  .phil-grid {
    grid-template-columns: 1fr;
  }

  .process-row {
    grid-template-columns: 1fr 1fr;
  }

  .process-step:nth-child(2) { border-right: none; }
  .process-step:nth-child(1),
  .process-step:nth-child(2) {
    border-bottom: 0.5px solid var(--color-border-light);
  }

  .diff-row {
    grid-template-columns: 1fr 1fr;
  }

  .diff-row .diff-cell:first-child {
    display: none;
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 600px) {
  .container { padding: 0 20px; }
  .section { padding: 56px 0; }

  .hero { padding: 64px 0 56px; }
  .hero__stats { gap: 28px; }

  .process-row {
    grid-template-columns: 1fr;
  }

  .process-step {
    border-right: none;
    border-bottom: 0.5px solid var(--color-border-light);
  }

  .process-step:last-child { border-bottom: none; }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__inner {
    grid-template-columns: 1fr;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .diff-table { overflow-x: auto; }
}

/* ============================================
   LOGO WITH ICON MARK
   ============================================ */

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: #1D9E75;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav__logo-icon svg {
  width: 20px;
  height: 20px;
}

.nav__logo-text {
  font-family: var(--font-serif);
  font-size: 20px;
  color: #1a1a18;
  letter-spacing: -0.01em;
}

.nav__logo-text span {
  color: #1D9E75;
}

/* Footer logo — slightly smaller */
.footer__logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: #1D9E75;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.footer__logo-icon svg {
  width: 17px;
  height: 17px;
}

/* Page hero band — teal rounded zone */
.page-hero-band {
  background: #1D9E75;
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}

.page-hero-band iframe {
  display: block;
  border: none;
  width: 100%;
}

/* ============================================
   PAGE HERO GRID — text left, visual right
   (mirrors homepage hero grid pattern)
   ============================================ */

.page-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.page-intro-visual {
  border-radius: 16px;
  overflow: hidden;
  background: #1D9E75;
}

.page-intro-visual iframe {
  display: block;
  border: none;
  width: 100%;
}

@media (max-width: 860px) {
  .page-intro-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .page-intro-visual { order: -1; }
}

/* ============================================
   HERO ROW — responsive two-column layout
   Used on manifesto, about, services, blog,
   contact, readiness-guide pages
   ============================================ */

.hero-row {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}

.hero-row__visual {
  border-radius: 16px;
  overflow: hidden;
  flex-shrink: 0;
  width: 380px;
  height: 380px;
  align-self: flex-start;
}

.hero-row__visual iframe {
  border: none;
  display: block;
  width: 100%;
  height: 100%;
}

/* Tablet: stack vertically, card below text */
@media (max-width: 900px) {
  .hero-row {
    flex-direction: column;
    gap: 32px;
  }

  .hero-row__visual {
    width: 100%;
    height: 260px;
    flex-shrink: unset;
    order: 1; /* card AFTER text on mobile */
  }

  .hero-row__visual iframe {
    height: 260px;
  }
}

/* Contact page specific — slightly shorter card */
.hero-row--contact .hero-row__visual {
  height: 360px;
}

@media (max-width: 900px) {
  .hero-row--contact .hero-row__visual {
    height: 240px;
  }
  .hero-row--contact .hero-row__visual iframe {
    height: 240px;
  }
}

/* Homepage mobile handled above in hero__grid rules */