/* ============================================================
   MTT Book Site — Design System
   marketingtechnologytransformation.com
   ============================================================ */

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  /* Brand Palette */
  --navy:        #1e1e3a;
  --navy-light:  #2d2d52;
  --tan:         #e8d5b0;
  --tan-light:   #f2e8d4;
  --tan-dark:    #d4be94;
  --cream:       #faf6ef;
  --white:       #ffffff;
  --charcoal:    #3a3a3a;
  --gray:        #6b6b6b;
  --accent:      #5c4d8a;
  --accent-dark: #463a6e;

  /* Type Scale */
  --h1: clamp(40px, 7vw, 72px);
  --h2: clamp(28px, 4vw, 42px);
  --h3: clamp(20px, 2.5vw, 28px);
  --body: 18px;
  --body-sm: 16px;
  --label: 13px;
  --cta-text: 16px;

  /* Letter Spacing */
  --ls-display: -0.02em;
  --ls-heading: -0.01em;
  --ls-label:    0.12em;

  /* Line Heights */
  --lh-display: 1.05;
  --lh-heading: 1.2;
  --lh-body:    1.7;

  /* Spacing */
  --sec-pad:    96px;
  --sec-pad-sm: 64px;
  --sec-pad-hero: 80px;
  --container:  1080px;
  --gutter:     28px;
  --gap-sm:     16px;
  --gap-md:     24px;
  --gap-lg:     48px;
  --gap-xl:     72px;
}

/* ── RESET ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', sans-serif;
  font-size: var(--body);
  line-height: var(--lh-body);
  color: var(--charcoal);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 700;
}
sup {
  font-size: 0.4em;
  vertical-align: super;
}
.heading-hero sup {
  font-size: 0.3em;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.hidden { display: none; }

/* ── LAYOUT ─────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container-narrow {
  max-width: 780px;
}
.prose-width {
  max-width: 780px;
}
.prose-centered {
  margin-left: auto;
  margin-right: auto;
}
.description-text {
  margin-bottom: var(--gap-lg);
}
.cta-body-centered {
  max-width: 480px;
  margin: 0 auto var(--gap-lg);
}
.success-body {
  max-width: 480px;
  margin: 0 auto var(--gap-lg);
}
.text-center { text-align: center; }
.text-right  { text-align: right; }

/* ── SECTIONS ───────────────────────────────────────────── */
.section-default {
  background: var(--cream);
  padding: var(--sec-pad) 0;
}
.section-alt {
  background: var(--tan-light);
  padding: var(--sec-pad) 0;
}
.section-hero {
  background: var(--tan);
  padding: var(--sec-pad-hero) 0;
}
.section-hero-compact {
  padding: var(--gap-lg) 0;
}
.section-waitlist {
  scroll-margin-top: 70px;
}
.section-brand {
  background: var(--navy);
  padding: var(--sec-pad) 0;
}
.section-header {
  margin-bottom: var(--gap-lg);
}

/* ── TYPOGRAPHY ─────────────────────────────────────────── */
.heading-hero {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: var(--h1);
  font-weight: 700;
  color: var(--navy);
  line-height: var(--lh-display);
  letter-spacing: -0.03em;
  margin-bottom: var(--gap-md);
  text-wrap: balance;
}
.heading-section {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: var(--h2);
  font-weight: 700;
  color: var(--navy);
  line-height: var(--lh-heading);
  letter-spacing: 0;
  margin-bottom: var(--gap-md);
  text-wrap: balance;
}
.text-center .heading-section {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.heading-sub {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: var(--h3);
  font-weight: 700;
  color: var(--navy);
  line-height: var(--lh-heading);
  letter-spacing: 0;
  margin-bottom: var(--gap-sm);
  text-wrap: balance;
}
.heading-light {
  color: var(--white);
}
.label-text {
  font-size: var(--label);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  margin-bottom: var(--gap-sm);
  display: block;
}
.label-light {
  color: var(--tan-light);
}
.label-muted {
  color: var(--gray);
}
.body-text {
  font-size: var(--body);
  line-height: var(--lh-body);
  color: var(--charcoal);
}
.body-small {
  font-size: var(--body-sm);
}
.body-light {
  color: rgba(255,255,255,0.85);
}
.body-muted {
  color: var(--gray);
}
.prose p + p {
  margin-top: var(--gap-md);
}

/* ── HEADER ─────────────────────────────────────────────── */
.site-header {
  background: var(--cream);
  border-bottom: 1px solid var(--tan-dark);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  font-size: 16px;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.01em;
  text-decoration: none;
}
.logo-accent {
  color: var(--accent);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
}
.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-link:hover,
.nav-link--active {
  color: var(--accent);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--navy);
  color: var(--white);
  font-size: var(--cta-text);
  padding: 14px 28px;
  border-radius: 6px;
}
.btn-primary:hover {
  background: var(--accent);
}
.btn-nav {
  background: var(--navy);
  color: var(--white);
  font-size: 14px;
  padding: 10px 24px;
  border-radius: 6px;
}
.btn-nav:hover {
  background: var(--accent);
}

/* ── HERO GRID ──────────────────────────────────────────── */
.hero-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--gap-lg);
  align-items: center;
}
.hero-subtitle {
  font-size: 20px;
  margin-bottom: var(--gap-lg);
}
.book-cover {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 24px 48px rgba(30, 30, 58, 0.15);
}

/* ── WAITLIST FORM ──────────────────────────────────────── */
.waitlist-form-wrap {
  background: var(--white);
  border: 1px solid var(--tan-dark);
  border-radius: 8px;
  padding: var(--gutter);
  max-width: 520px;
}
.waitlist-form .form-row {
  display: flex;
  gap: 12px;
}
.form-input {
  flex: 1;
  font-family: 'DM Sans', sans-serif;
  font-size: var(--body-sm);
  padding: 12px 16px;
  border: 1px solid var(--tan-dark);
  border-radius: 6px;
  background: var(--white);
  color: var(--charcoal);
  outline: none;
  transition: border-color 0.2s;
}
.form-input:focus {
  border-color: var(--accent);
}
.form-note {
  margin-top: 10px;
  font-size: 13px;
  color: var(--gray);
}
.waitlist-form-wrap.form-confirmed {
  background: transparent;
  border: none;
  padding: var(--gap-sm) 0;
}
.form-confirm {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
  text-align: center;
}
.cta-body {
  margin-bottom: var(--gap-lg);
}

/* CTA section — centered form */
.section-hero .waitlist-form-wrap {
  margin: 0 auto;
  max-width: 420px;
}

/* ── CARDS ──────────────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}
.card {
  background: var(--white);
  border: 1px solid var(--tan-dark);
  border-radius: 8px;
  padding: 32px var(--gutter);
}
.card .label-text {
  margin-bottom: var(--gap-sm);
}
.phase-card-name {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-dark);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
  margin-bottom: var(--gap-sm);
}
.card .heading-sub {
  margin-bottom: var(--gap-sm);
  font-size: 17px;
}

/* ── AUDIENCE GRID ──────────────────────────────────────── */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}
.audience-item {
  border-top: 2px solid var(--accent);
  padding-top: 20px;
}
.audience-item .heading-sub {
  margin-bottom: var(--gap-sm);
}


/* ── ABOUT PAGE ─────────────────────────────────────────── */

/* Top band — silent navy color break between nav and narrative */
.about-top-band {
  background: var(--navy);
  height: 64px;
}

.section-about-narrative {
  background: var(--cream);
  padding: var(--sec-pad) 0;
}
.section-about-narrative .label-text {
  display: block;
  margin-bottom: var(--gap-md);
}

/* Hero heading above the narrative */
.about-hero-heading {
  font-size: clamp(30px, 5.25vw, 54px);
  margin-bottom: var(--gap-lg);
}

/* Narrative: two-column grid */
.about-narrative {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--gap-lg);
  align-items: start;
}

.about-float-block {
  /* width set by grid column */
}
.about-headshot-float {
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: top;
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(30, 30, 58, 0.18);
  display: block;
}
.about-float-attribution {
  margin-top: var(--gap-sm);
}
.about-attribution-name {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: var(--body);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
}
.about-float-attribution p + p,
.about-attribution-title {
  font-size: var(--label);
  font-style: italic;
  color: var(--gray);
  line-height: 1.5;
  margin-top: 0;
}

/* Pull quote */
.pull-quote {
  border-left: 4px solid var(--navy);
  background: var(--tan-light);
  border-radius: 0 6px 6px 0;
  padding: var(--gap-md) var(--gap-lg);
  margin: var(--gap-md) 0;
  font-size: clamp(18px, 2vw, 22px);
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 700;
  color: var(--navy);
  line-height: var(--lh-heading);
}

/* Credibility section heading */
.section-alt .heading-section {
  margin-bottom: var(--gap-lg);
}

/* Two-column cards (constrained to prose width via container-narrow wrapper) */
.credibility-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-md);
  margin-bottom: var(--gap-lg);
}
.credibility-card {
  background: var(--white);
  border: 1px solid var(--tan-dark);
  border-radius: 8px;
  padding: var(--gap-lg);
}

/* NYU block — dark anchor */
.credibility-nyu-block {
  background: var(--navy);
  border-radius: 8px;
  padding: var(--gap-lg);
  margin-bottom: var(--gap-lg);
}
.credibility-nyu-heading {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: clamp(22px, 2.5vw, 28px);
  font-weight: 700;
  color: var(--white);
  line-height: var(--lh-heading);
  margin-bottom: var(--gap-sm);
}

/* Writing block — plain text */
.credibility-writing {}

/* Book section — tightened top padding (~50% of standard) */
.section-book {
  background: var(--cream);
  padding: var(--sec-pad-sm) 0;
}

/* Book close */
.about-book-close p + p {
  margin-top: var(--gap-md);
}
.about-book-kicker {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  color: var(--navy);
  text-wrap: balance;
}

/* Mobile */
@media (max-width: 640px) {
  .about-narrative {
    grid-template-columns: 1fr;
  }
  .about-float-block {
    width: 50%;
    margin: 0 auto;
  }
  .credibility-grid {
    grid-template-columns: 1fr;
    gap: var(--gap-md);
  }
}

/* ── FRAMEWORK PAGE ─────────────────────────────────────── */
.framework-opening p + p {
  margin-top: var(--gap-md);
}
.framework-diagram {
  margin-bottom: var(--gap-lg);
}
.framework-diagram img {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  border-radius: 6px;
}
.framework-intro {
  max-width: 880px;
  margin: 0 auto var(--gap-xl);
}
.shifts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}
.shift-item {
  border-top: 2px solid var(--accent);
  padding-top: 20px;
}
.shift-item .heading-sub {
  margin-bottom: var(--gap-sm);
}

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--tan-dark);
}
.faq-item:first-child {
  border-top: 1px solid var(--tan-dark);
}
.faq-question {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-md);
  padding: var(--gap-md) 0;
  cursor: pointer;
  font-family: 'Roboto Condensed', sans-serif;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  letter-spacing: var(--ls-heading);
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  flex-shrink: 0;
  font-size: 22px;
  font-weight: 400;
  color: var(--accent);
  transition: transform 0.2s ease;
}
.faq-item[open] > .faq-question::after {
  transform: rotate(45deg);
}
.faq-answer {
  padding-bottom: var(--gap-md);
}
.faq-answer p {
  margin: 0;
}

/* ── FOOTER ─────────────────────────────────────────────── */
.site-footer {
  background: var(--navy);
  padding: 40px 0;
}
.footer-copy {
  font-size: 14px;
  color: rgba(255,255,255,0.4);
  text-align: center;
}
.footer-copy a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
}
.footer-copy a:hover {
  color: var(--white);
}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-cover {
    order: -1;
    max-width: 260px;
    margin: 0 auto;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .audience-grid {
    grid-template-columns: 1fr;
  }
  .shifts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --sec-pad: 64px;
    --sec-pad-hero: 56px;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--cream);
    border-bottom: 1px solid var(--tan-dark);
    flex-direction: column;
    padding: var(--gap-md) var(--gutter);
    gap: var(--gap-md);
    align-items: flex-start;
  }
  .site-nav.open {
    display: flex;
  }
  .site-header {
    position: relative;
  }
  .nav-toggle {
    display: flex;
  }
  .waitlist-form .form-row {
    flex-direction: column;
  }
  .waitlist-form-wrap {
    max-width: 100%;
  }
  .hero-subtitle {
    font-size: var(--body);
  }
}