/* ============================================
   READING LAB — Brand tokens & shared components
   Lifted from ReadingLab_BrandGuide_v3
   ============================================ */

:root {
  /* PURPLE — primary, trust + imagination */
  --purple-light: #C8C4F0;
  --purple-mid:   #9B94E0;
  --purple-main:  #7B72D4;
  --purple-deep:  #5A52B8;

  /* CYAN — energy + curiosity */
  --cyan-light:   #A8EEF4;
  --cyan-mid:     #5DDCE8;
  --cyan-main:    #2FC5D4;
  --cyan-deep:    #1A9AAA;

  /* NEUTRALS */
  --navy:         #2A2460;
  --off-white:    #FAF9FF;
  --light-bg:     #F3F1FD;
  --text-body:    #3D3A60;
  --text-muted:   #7A78A0;
  --border:       #E4E0F8;
  --white:        #FFFFFF;

  /* SPACING (8px grid) */
  --s-1: 4px;  --s-2: 8px;  --s-3: 16px; --s-4: 24px;
  --s-5: 40px; --s-6: 64px; --s-7: 96px; --s-8: 128px;

  /* RADIUS */
  --r-sm: 6px; --r-md: 10px; --r-lg: 14px; --r-xl: 20px; --r-2xl: 28px;

  /* SHADOWS */
  --shadow-sm: 0 1px 2px rgba(42,36,96,0.06), 0 1px 3px rgba(42,36,96,0.04);
  --shadow-md: 0 4px 12px rgba(42,36,96,0.08), 0 2px 4px rgba(42,36,96,0.04);
  --shadow-lg: 0 12px 32px rgba(42,36,96,0.12), 0 4px 12px rgba(42,36,96,0.06);
  --shadow-glow: 0 8px 28px rgba(123,114,212,0.28);

  /* TYPE */
  --font: 'Roboto', 'Helvetica Neue', Arial, sans-serif;

  /* LAYOUT */
  --max: 1200px;
  --max-narrow: 880px;
}

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

html {
  scroll-behavior: smooth;
  /* Prevent horizontal scroll caused by absolutely-positioned doodles
     (.float-book, .characters, etc.) that intentionally overhang the
     viewport. clip is preferred (no scroll context); hidden is the
     fallback for older Safari. */
  overflow-x: hidden;
  overflow-x: clip;
}

body {
  font-family: var(--font);
  background: var(--off-white);
  color: var(--text-body);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  overflow-x: clip;
}

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

a { color: var(--purple-deep); text-decoration: none; }
a:hover { color: var(--purple-main); }

/* ===== TYPOGRAPHY SCALE ===== */
.eyebrow {
  font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 2.5px;
  color: var(--purple-main);
}
.eyebrow.cyan { color: var(--cyan-deep); }
.eyebrow.white { color: rgba(255,255,255,0.7); }

h1, h2, h3, h4 {
  font-family: var(--font);
  color: var(--navy);
  line-height: 1.15;
  font-weight: 700;
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 5.5vw, 64px); letter-spacing: -1px; }
h2 { font-size: clamp(30px, 3.6vw, 44px); letter-spacing: -0.5px; }
h3 { font-size: 22px; letter-spacing: -0.2px; }
h4 { font-size: 16px; }

p { text-wrap: pretty; }
.lede { font-size: 19px; line-height: 1.6; color: var(--text-body); max-width: 640px; }
.muted { color: var(--text-muted); }

/* ===== LAYOUT ===== */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--s-5); }
.wrap-narrow { max-width: var(--max-narrow); margin: 0 auto; padding: 0 var(--s-5); }
.section { padding: var(--s-7) 0; }
.section-sm { padding: var(--s-6) 0; }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,249,255,0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(228,224,248,0.7);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  padding: 14px var(--s-5);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-4);
}
.nav-logo {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.nav-mark {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--purple-main) 0%, var(--cyan-main) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 14px;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-md);
}
.nav-wordmark {
  display: flex; flex-direction: column; line-height: 1;
}
.nav-wordmark .brand {
  font-weight: 700; color: var(--navy); font-size: 17px; letter-spacing: -0.2px;
}
.nav-wordmark .sub {
  font-size: 10.5px; color: var(--text-muted); margin-top: 2px;
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex; gap: var(--s-5); align-items: center;
}
.nav-links a {
  color: var(--text-body); font-size: 14.5px; font-weight: 500;
  position: relative; padding: 6px 0;
}
.nav-links a:hover { color: var(--purple-deep); }
.nav-links a.active { color: var(--navy); }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--cyan-main); border-radius: 1px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: var(--r-md);
  font-family: var(--font); font-weight: 500; font-size: 14.5px;
  text-decoration: none; border: 0; cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--purple-main); color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { background: var(--purple-deep); transform: translateY(-1px); color: #fff; }
.btn-secondary {
  background: var(--white); color: var(--navy);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover { border-color: var(--purple-mid); color: var(--purple-deep); }
.btn-cyan {
  background: var(--cyan-main); color: var(--navy);
}
.btn-cyan:hover { background: var(--cyan-deep); color: #fff; }
.btn-ghost {
  background: transparent; color: var(--purple-deep); padding: 13px 0;
}
.btn-ghost:hover { color: var(--purple-main); }
.btn-lg { padding: 16px 28px; font-size: 15.5px; border-radius: var(--r-lg); }
.btn-arrow::after { content: '→'; transition: transform .2s; }
.btn-arrow:hover::after { transform: translateX(3px); }

/* ===== CARDS ===== */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--s-4);
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.card:hover { border-color: var(--purple-light); box-shadow: var(--shadow-md); }
.card.flat { box-shadow: var(--shadow-sm); }
.card.flat:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ===== PILLS / TAGS ===== */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px;
  font-size: 12.5px; font-weight: 500;
  background: var(--light-bg); color: var(--purple-deep);
  border: 1px solid var(--border);
}
.pill.cyan { background: var(--cyan-light); color: var(--cyan-deep); border-color: rgba(45,197,212,0.25); }
.pill.purple { background: var(--purple-light); color: var(--purple-deep); border-color: rgba(123,114,212,0.3); }
.pill.solid { background: var(--purple-main); color: #fff; border-color: var(--purple-main); }
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ===== PLACEHOLDER (image stand-in) ===== */
.ph {
  background:
    repeating-linear-gradient(135deg, var(--light-bg) 0 12px, #ECE9FA 12px 24px);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 12px; font-weight: 500; letter-spacing: 1px;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}
.ph .ph-label {
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  font-family: 'Roboto Mono', monospace;
  font-size: 10px;
}
.ph.dark {
  background:
    repeating-linear-gradient(135deg, #2A2460 0 12px, #322a70 12px 24px);
  color: rgba(255,255,255,0.5);
  border-color: rgba(255,255,255,0.08);
}
.ph.cyan {
  background:
    repeating-linear-gradient(135deg, var(--cyan-light) 0 12px, #BEF0F4 12px 24px);
  color: var(--cyan-deep);
  border-color: rgba(45,197,212,0.25);
}

/* portrait headshot placeholder — circular */
.ph-avatar {
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 38%, var(--purple-light) 0 32%, transparent 32.5%),
    radial-gradient(circle at 50% 92%, var(--purple-light) 0 50%, transparent 50.5%),
    var(--light-bg);
  border: 1.5px solid var(--border);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,0.75);
  padding: var(--s-7) 0 var(--s-5);
  margin-top: var(--s-7);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: var(--s-5);
  padding-bottom: var(--s-5);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer h4 {
  color: #fff; font-size: 12px; text-transform: uppercase;
  letter-spacing: 2px; font-weight: 700; margin-bottom: 16px;
  opacity: 0.65;
}
.footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer a { color: rgba(255,255,255,0.75); font-size: 14px; }
.footer a:hover { color: var(--cyan-mid); }
.footer-brand { max-width: 320px; }
.footer-brand p { font-size: 14px; line-height: 1.6; margin-top: 14px; }
.footer-bottom {
  padding-top: var(--s-4);
  display: flex; justify-content: center; align-items: center;
  font-size: 12.5px; color: rgba(255,255,255,0.5);
}

/* ===== UTIL ===== */
.grid { display: grid; gap: var(--s-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.gap-2 { gap: var(--s-2); }
.gap-3 { gap: var(--s-3); }
.gap-4 { gap: var(--s-4); }
.gap-5 { gap: var(--s-5); }
.mt-2 { margin-top: var(--s-2); }
.mt-3 { margin-top: var(--s-3); }
.mt-4 { margin-top: var(--s-4); }
.mt-5 { margin-top: var(--s-5); }
.mt-6 { margin-top: var(--s-6); }
.text-center { text-align: center; }
.bg-light { background: var(--light-bg); }
.bg-navy { background: var(--navy); color: rgba(255,255,255,0.85); }
.bg-navy h1, .bg-navy h2, .bg-navy h3, .bg-navy h4 { color: #fff; }

/* ===== NAV TOGGLE (hamburger) ===== */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 10px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform .24s ease, opacity .18s ease;
  transform-origin: center;
}
.nav.open .nav-toggle span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ===== RESPONSIVE ===== */
@media (max-width: 880px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: var(--s-6) 0; }

  .nav-toggle { display: flex; }
  .nav-inner { padding: 12px var(--s-4); }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 14px;
    background: rgba(255, 248, 238, 0.98);
    backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 2px dashed var(--paper-line, #ECDFC4);
    box-shadow: 0 14px 28px rgba(42,36,96,0.12);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform .22s ease, opacity .22s ease;
  }
  .nav.open .nav-links {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 14px var(--s-4);
    font-size: 17px;
    font-weight: 600;
    border-bottom: 1px dashed rgba(42,36,96,0.08);
  }
  .nav-links a:last-child { border-bottom: 0; }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { color: var(--purple-deep); }
  .nav-links .btn { margin: 10px var(--s-4) 0; text-align: center; }
}