/* ==========================================================================
   Verbatum website mockup — Phase A
   Tokens → Base → Layout → Sections → Responsive
   ========================================================================== */

:root {
  /* Palette */
  --bg-light: #F6F4ED;
  --bg-dark-a: #383948;
  --bg-dark-b: #292B3D;
  --text-primary: #292B3D;
  --text-secondary: #474961;
  --text-fine: #6A6D82;
  --text-on-dark: #D1D4E6;
  --accent: #B8BACE;
  /* Brand accent: deep wine/burgundy — cool-toned red that sits
     beside indigo-violet like leather on a hardcover Bible rather
     than a tomato-red warning. Used on primary CTAs. */
  --cta-bg: #7A2139;
  --cta-fg: #F6F4ED;
  --cta-bg-hover: #9A2E4A;
  --cta-bg-dark: #D68AA0;
  --cta-fg-dark: #1F2030;

  /* Typography */
  --font-serif: "Charter", "Iowan Old Style", "New York", Georgia, serif;
  --font-sans: -apple-system, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-brand: Luminari, "Charter", serif;
  --fs-hero: clamp(40px, 5.5vw, 64px);
  --fs-h2: clamp(28px, 3.2vw, 40px);
  --fs-h3: 20px;
  --fs-body: 17px;
  --fs-caption: 13px;
  --fs-label: 11.5px;

  /* Spacing */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --radius: 10px;
  --content-max: 1120px;
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.005em;
}

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

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

/* Layout */
.band { padding: var(--sp-20) var(--sp-8); position: relative; overflow: hidden; }
.band--light { background: var(--bg-light); color: var(--text-primary); }
.band--dark {
  background: linear-gradient(180deg, var(--bg-dark-a) 0%, var(--bg-dark-b) 100%);
  color: var(--text-on-dark);
}
.band--compact { padding-top: var(--sp-12); padding-bottom: var(--sp-12); }
.band--fullheight { min-height: 100vh; display: flex; align-items: center; }
.band--fullheight > .band-inner { width: 100%; }

.band-inner { max-width: var(--content-max); margin: 0 auto; position: relative; z-index: 1; }

/* Section dividers — four shapes at the four color-change boundaries.
   Each divider is filled with the *previous* section's color so it reads
   as the prior band cresting into the new one. */
.band-divider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  display: block;
  z-index: 0;
  pointer-events: none;
}
/* Sections that start with a divider sit at a color-change boundary.
   Browser subpixel rounding can leave a hairline of the page background
   (cream) between the previous dark section and the divider's top edge,
   which reads as a torn seam. Pull these sections up 2px so the divider
   physically overlaps the previous section and the seam vanishes. The
   shift is imperceptible inside the section's own padding. */
.band:has(> .band-divider) { margin-top: -2px; }
/* Book divider uses preserveAspectRatio="none", so a fixed pixel
   height stretches the spine tall on narrow viewports. Scale with
   vw so the shape stays proportional to the width, with sensible
   min/max bounds. */
.band-divider--book   { height: clamp(40px, 6.5vw, 96px); }
/* Same preserveAspectRatio="none" steepness problem as the book and
   deckle: a fixed 84px height makes the angle's slope look far steeper
   on narrow viewports. Scale with vw so the slope ratio holds. */
.band-divider--angle  { height: clamp(32px, 5.8vw, 84px); }
/* preserveAspectRatio="none" makes the teeth look steep on narrow
   viewports when height is fixed. Scale with viewport width so the
   zigzag period/amplitude stay in proportion. */
.band-divider--deckle { height: clamp(32px, 6vw, 88px); }

/* Material drop-shadow divider: a horizontal edge where the light
   section above casts a soft shadow on the darker section below.
   Shadow sits inside the top of the destination (dark) band. */
.band-divider--shadow {
  height: 56px;
  background: linear-gradient(180deg,
    rgba(0,0,0,0.18) 0%,
    rgba(0,0,0,0.10) 35%,
    rgba(0,0,0,0.04) 70%,
    rgba(0,0,0,0)    100%);
  box-shadow: inset 0 1px 0 rgba(0,0,0,0.10);
}

/* Section backgrounds — blurred color fields + optional ornament.
   Each .band-bg fills the band behind .band-inner; dividers and content
   sit above via z-index. All decorative, marked aria-hidden. */
.band-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Hero: warm accent blob bottom-left, cool wash top-right. */
.band-bg--hero {
  background:
    radial-gradient(circle at 12% 88%, rgba(184,186,206,0.32), transparent 44%),
    radial-gradient(circle at 88% 18%, rgba(41,43,61,0.06), transparent 40%);
}

/* Keep on time: two blobs at opposite corners, very soft. */
.band-bg--keep-on-time {
  background:
    radial-gradient(circle at 8% 22%, rgba(184,186,206,0.28), transparent 38%),
    radial-gradient(ellipse at 92% 78%, rgba(71,73,97,0.08), transparent 42%);
}

/* Forever: one warm field + the paper-grain SVG on top for a parchment feel. */
.band-bg--forever {
  background: radial-gradient(ellipse at 78% 48%, rgba(184,186,206,0.26), transparent 46%);
}
.paper-grain {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.18;
  mix-blend-mode: multiply;
}

/* Dark bands: subtle radial glow so they don't read flat. */
.band-bg--dark-glow {
  background: radial-gradient(ellipse at 50% 20%, rgba(184,186,206,0.10), transparent 55%);
}
.band-bg--dark-focus {
  background: radial-gradient(ellipse at 50% 50%, rgba(184,186,206,0.08), transparent 60%);
}

@media (max-width: 880px) {
  .paper-grain { opacity: 0.12; }
}

/* Header — matches .band / .band-inner so the brand lines up with
   content-max gutters on any viewport. */
.site-header { padding: var(--sp-6) var(--sp-8); }
.site-header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}
.brand { display: inline-flex; align-items: baseline; gap: 2px; }
.brand-mark {
  font-family: var(--font-brand);
  font-size: 42px;
  color: var(--text-primary);
  line-height: 1;
}
.brand-name {
  font-family: var(--font-brand);
  font-size: 36px;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  line-height: 1;
}

/* Primary nav */
.site-nav { display: flex; align-items: center; }
.site-nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}
.site-nav-menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--sp-2) 0;
  transition: color 0.15s ease;
}
.site-nav-menu a:hover { color: var(--text-primary); }
.site-nav-cta {
  background: var(--cta-bg);
  color: var(--cta-fg) !important;
  padding: var(--sp-2) var(--sp-4) !important;
  border-radius: var(--radius);
}
.site-nav-cta:hover { color: var(--cta-fg) !important; background: var(--cta-bg-hover); }

/* Hamburger toggle (hidden by default, shown on narrow viewports) */
.site-nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: var(--sp-2);
  cursor: pointer;
  color: var(--text-primary);
}
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.hamburger { position: relative; }
.hamburger::before,
.hamburger::after { content: ""; position: absolute; left: 0; }
.hamburger::before { top: -7px; }
.hamburger::after  { top:  7px; }
.site-nav-toggle[aria-expanded="true"] .hamburger { background: transparent; }
.site-nav-toggle[aria-expanded="true"] .hamburger::before { transform: translateY(7px) rotate(45deg); }
.site-nav-toggle[aria-expanded="true"] .hamburger::after  { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}
.hero h1 {
  font-size: var(--fs-hero);
  margin: 0 0 var(--sp-4);
}
.hero h1 em {
  font-style: italic;
  color: var(--text-secondary);
}
.hero-sub {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  max-width: 460px;
  margin: 0 0 var(--sp-8);
}
.cta {
  display: inline-block;
  background: var(--cta-bg);
  color: var(--cta-fg);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.cta:hover {
  background: var(--cta-bg-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(122,33,57,0.30), 0 2px 4px rgba(41,43,61,0.12);
}

.caption {
  font-size: var(--fs-caption);
  color: var(--text-fine);
  margin: var(--sp-3) 0 0;
  letter-spacing: 0.02em;
}

.hero-visual { color: var(--text-primary); }
.tree-svg {
  width: 100%;
  height: auto;
  background: #FFFFFF;
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(41,43,61,0.12), 0 2px 8px rgba(41,43,61,0.06);
  padding: var(--sp-6);
}

/* ===== Wedge ===== */
.wedge {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding-block: var(--sp-8);
}
.wedge-problem {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.2vw, 28px);
  line-height: 1.45;
  color: var(--text-secondary);
  margin: 0 0 var(--sp-6);
}
.wedge-answer {
  font-family: var(--font-serif);
  font-size: clamp(24px, 2.4vw, 32px);
  font-style: italic;
  color: var(--text-primary);
  margin: 0;
}

/* ===== Showcase (dark-band) ===== */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: var(--sp-16);
  align-items: center;
}
.label {
  font-size: var(--fs-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 var(--sp-3);
}
.band--dark h2 {
  font-size: var(--fs-h2);
  color: #E8E9F4;
  margin: 0 0 var(--sp-4);
}
.showcase-desc {
  font-size: var(--fs-body);
  color: var(--accent);
  opacity: 0.95;
  max-width: 440px;
  margin: 0;
}
.screencast-slot {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
  position: relative;
}
.screencast-slot svg { width: 100%; height: auto; display: block; }
.screencast-caption {
  font-size: 11px;
  color: var(--accent);
  opacity: 0.5;
  margin: var(--sp-2) 0 0;
  font-style: italic;
}

/* ===== Section header (shared) ===== */
.section-header {
  max-width: 720px;
  margin: 0 auto var(--sp-12);
  text-align: center;
}
.section-header h2 {
  font-size: var(--fs-h2);
  margin: 0;
}
.label--light { color: var(--text-fine); }

/* ===== Paired panels ===== */
.paired {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
}
.paired-panel { margin: 0; }
.panel-viz {
  border-radius: var(--radius);
  padding: var(--sp-6);
  background: #FFFFFF;
  box-shadow: 0 20px 50px rgba(41,43,61,0.10), 0 2px 8px rgba(41,43,61,0.06);
}
.panel-viz--dark { padding: 0; background: transparent; box-shadow: 0 24px 60px rgba(0,0,0,0.25); }
.panel-viz svg { width: 100%; height: auto; }
.paired-panel figcaption {
  font-size: var(--fs-caption);
  color: var(--text-secondary);
  margin-top: var(--sp-3);
  line-height: 1.5;
}

/* ===== Compact callout (dark, short) ===== */
.compact-callout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--sp-12);
  align-items: center;
}
.callout-visual svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
}

/* ===== Forever ===== */
.forever {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}
.forever h2 { font-size: var(--fs-h2); margin: 0 0 var(--sp-4); }
.forever-desc {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0;
}
.forever-visual { text-align: center; }
.md-excerpt {
  max-width: 380px;
  width: 100%;
  margin: 0 auto;
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(41,43,61,0.14), 0 2px 8px rgba(41,43,61,0.06);
}
.forever-caption {
  font-size: 11px;
  color: var(--text-fine);
  opacity: 0.55;
  margin: var(--sp-3) 0 0;
  font-style: italic;
}

/* ===== Download ===== */
.download {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.download h2 { font-size: var(--fs-h2); margin: 0 0 var(--sp-8); }
.cta--large { font-size: 17px; padding: var(--sp-4) var(--sp-8); }
.inline-link { color: var(--text-primary); text-decoration: underline; text-decoration-color: var(--text-fine); text-underline-offset: 2px; }
.fine-print {
  font-size: var(--fs-caption);
  color: var(--text-fine);
  margin: var(--sp-2) 0 0;
}
.fine-print.muted { opacity: 0.7; }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-light);
  padding: var(--sp-12) var(--sp-8);
  position: relative;
}
/* Hairline above "From the makers", fading at the left and right
   edges so it reads as a centered ornamental rule instead of a
   full-width border. */
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(41,43,61,0.28);
  -webkit-mask-image: linear-gradient(90deg,
    transparent 0%, #000 18%, #000 82%, transparent 100%);
          mask-image: linear-gradient(90deg,
    transparent 0%, #000 18%, #000 82%, transparent 100%);
  pointer-events: none;
}
.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  align-items: center;
  text-align: center;
}
.makers {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0;
  font-size: 15px;
}
.footer-links {
  display: flex;
  gap: var(--sp-6);
  font-size: var(--fs-caption);
}
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.copyright {
  font-size: var(--fs-caption);
  color: var(--text-fine);
  margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 880px) {
  .band { padding: var(--sp-12) var(--sp-6); }
  .hero,
  .showcase,
  .forever,
  .compact-callout {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }
  .hero-copy,
  .showcase-copy,
  .forever-copy,
  .callout-copy { order: 1; }
  .hero-visual,
  .screencast-slot,
  .forever-visual,
  .callout-visual { order: 2; }
  .paired { grid-template-columns: 1fr; gap: var(--sp-6); }
  .section-header { margin-bottom: var(--sp-8); }
  .tree-svg { padding: var(--sp-4); }

  /* Mobile nav: hamburger visible, menu drops below the header. */
  .site-header { padding: var(--sp-4) var(--sp-6); position: relative; }
  .site-nav-toggle { display: block; }
  .site-nav-menu {
    position: absolute;
    top: 100%;
    right: var(--sp-6);
    left: var(--sp-6);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-light);
    border: 1px solid rgba(41,43,61,0.08);
    border-radius: var(--radius);
    padding: var(--sp-2);
    box-shadow: 0 12px 32px rgba(41,43,61,0.12);
    display: none;
    z-index: 20;
  }
  .site-nav-toggle[aria-expanded="true"] + .site-nav-menu { display: flex; }
  .site-nav-menu li { border-bottom: 1px solid rgba(41,43,61,0.06); }
  .site-nav-menu li:last-child { border-bottom: 0; }
  .site-nav-menu a {
    display: block;
    padding: var(--sp-3) var(--sp-3);
    font-size: 16px;
  }
  .site-nav-cta {
    margin-top: var(--sp-2);
    text-align: center;
  }
}

@media (max-width: 520px) {
  :root { --fs-body: 16px; --sp-20: 56px; }
  .band { padding: var(--sp-12) var(--sp-4); }
  .site-header { padding: var(--sp-4); }
  .hero-sub, .forever-desc, .showcase-desc { font-size: 16px; }
  .footer-links { flex-wrap: wrap; gap: var(--sp-4); justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  .cta { transition: none; }
  .cta:hover { transform: none; }
}

/* ===== Accessibility ===== */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  padding: var(--sp-3) var(--sp-4);
  background: var(--text-primary);
  color: var(--bg-light);
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

a:focus-visible, .cta:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
  border-radius: 6px;
}
.band--dark a:focus-visible { outline-color: var(--accent); }

/* ===== Language switcher ===== */
.lang-switcher { position: relative; }
.lang-switcher-current {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-2) 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}
.lang-switcher-current::-webkit-details-marker { display: none; } /* Safari default triangle */
.lang-switcher-current:hover { color: var(--text-primary); }
.lang-switcher-caret {
  font-size: 10px;
  transition: transform 0.2s ease;
}
.lang-switcher[open] .lang-switcher-caret { transform: rotate(180deg); }
.lang-switcher-menu {
  list-style: none;
  margin: var(--sp-2) 0 0;
  padding: var(--sp-2);
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-light);
  border: 1px solid rgba(41,43,61,0.08);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(41,43,61,0.12);
  min-width: 140px;
  z-index: 21;
}
.lang-switcher-menu li { border-bottom: 1px solid rgba(41,43,61,0.06); }
.lang-switcher-menu li:last-child { border-bottom: 0; }
.lang-switcher-menu a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  font-size: 14px;
  color: var(--text-secondary);
}
.lang-switcher-menu a:hover { color: var(--text-primary); background: rgba(41,43,61,0.04); }

/* On mobile (within the collapsed nav menu), pin the dropdown inline
   so it doesn't float off the hamburger tray. */
@media (max-width: 880px) {
  .lang-switcher-menu {
    position: static;
    margin-top: var(--sp-2);
    box-shadow: none;
    border: 1px solid rgba(41,43,61,0.10);
  }
  .lang-switcher-current { padding: var(--sp-3); }
}