/* ============================================================
   THE VOICE LIBRARY — Reader stylesheet
   Scope: books/the-voice-library/chapter-one/
   All selectors namespaced tvl-
   No entrance fades. No scroll effects. No animated backgrounds.
   Only moving element: progress bar width (driven by JS).
   ============================================================ */

:root {
  color-scheme: dark;
  --tvl-black:      #0D0F12;
  --tvl-charcoal:   #151A22;
  --tvl-blue-black: #1C2333;
  --tvl-blue:       #3B6EA5;
  --tvl-ink:        #E7EDF0;
  --tvl-muted:      rgba(231, 237, 240, .58);
  --tvl-faint:      rgba(231, 237, 240, .28);
  --tvl-line:       rgba(231, 237, 240, .12);
  --tvl-serif:      "Georgia", "Times New Roman", serif;
  --tvl-sans:       "Segoe UI", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

/* ── Base ── */
.tvl-reader-page {
  background: linear-gradient(
    180deg,
    var(--tvl-black) 0%,
    var(--tvl-charcoal) 60%,
    var(--tvl-blue-black) 100%
  );
  color: var(--tvl-ink);
  font-family: var(--tvl-sans);
  min-height: 100vh;
}

/* ── Progress bar ── */
.tvl-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(231, 237, 240, .07);
  z-index: 200;
}

.tvl-progress-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--tvl-blue);
  transition: width .1s linear;
}

/* ── Navigation ── */
.tvl-reader-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem 1.75rem;
  padding: 1.5rem clamp(1.25rem, 6vw, 3.5rem);
  padding-top: calc(1.5rem + 3px);
}

.tvl-reader-nav-link {
  color: var(--tvl-muted);
  font-family: var(--tvl-sans);
  font-size: .82rem;
  letter-spacing: .04em;
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.tvl-reader-nav-link:hover {
  color: var(--tvl-ink);
}

.tvl-reader-nav-link:focus-visible {
  outline: 2px solid var(--tvl-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

/* ── Main column ── */
.tvl-reader-main {
  max-width: 38rem;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 6vw, 2.5rem) 7rem;
}

/* ── Section label (h1) ── */
.tvl-reader-label {
  font-family: var(--tvl-sans);
  font-size: .76rem;
  font-weight: 400;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--tvl-muted);
  margin: 2.75rem 0 3.25rem;
}

/* ── Article ── */
.tvl-reader-article {
  /* no special wrapper styles; paragraphs do the work */
}

.tvl-reader-article p {
  font-family: var(--tvl-serif);
  font-size: clamp(1.06rem, 2.2vw, 1.2rem);
  line-height: 1.86;
  color: var(--tvl-ink);
  margin: 0 0 1.15em;
}

.tvl-reader-article p strong {
  font-weight: 600;
  color: var(--tvl-ink);
}

.tvl-reader-article p em {
  font-style: italic;
}

/* ── Ending state ── */
.tvl-reader-end {
  margin-top: 5.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--tvl-line);
  text-align: center;
}

.tvl-reader-end-section {
  font-family: var(--tvl-sans);
  font-size: .76rem;
  font-weight: 400;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--tvl-muted);
  margin: 0 0 .5rem;
}

.tvl-reader-end-next {
  font-family: var(--tvl-serif);
  font-size: 1rem;
  color: var(--tvl-faint);
  margin: 0;
  font-style: italic;
}

/* ── Mobile ── */
@media (max-width: 600px) {
  .tvl-reader-nav {
    gap: .5rem 1.25rem;
    padding: 1.15rem 1.25rem;
    padding-top: calc(1.15rem + 3px);
  }

  .tvl-reader-label {
    margin: 2rem 0 2.5rem;
  }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .tvl-progress-fill {
    transition: none;
  }
}

/* ── High contrast / forced colours ── */
@media (forced-colors: active) {
  .tvl-progress-fill {
    background: Highlight;
  }

  .tvl-reader-nav-link {
    color: LinkText;
  }
}