:root {
  /* Colors */
  --color-bg-base:      #05001E;
  --color-bg-card:      rgba(0, 0, 0, 0.45);
  --color-bg-nav:       rgba(0, 0, 0, 0.0);
  --color-text-primary: #FFFFFF;
  --color-text-muted:   #CCCCCC;
  --color-accent-gold:  #F1C40F;
  --color-accent-cyan:  #00D4FF;
  --color-btn-bg:       #222266;
  --color-btn-border:   #AAAA99;
  --color-nav-hover:    #F1C40F;
  --color-focus-ring:   #F1C40F;

  /* Typography */
  --text-hero:       clamp(3rem, 12vw, 7.5rem);
  --text-display:    clamp(1.75rem, 4vw, 3rem);
  --text-heading:    clamp(1.25rem, 2.5vw, 1.75rem);
  --text-subheading: clamp(1rem, 2vw, 1.25rem);
  --text-body:       1rem;
  --text-small:      0.875rem;
  --text-caption:    0.75rem;

  /* Spacing */
  --space-1:  4px;
  --space-2:  8px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-8:  48px;
  --space-10: 64px;
}

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

/* ── Base ── */
body, html {
  width: 100%;
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
}

body {
  min-height: 100vh;
  position: relative;
}

h1 {
  font-size: 35px;
  color: var(--color-accent-gold);
  letter-spacing: 2px;
}

/* ── Accessibility ── */
.skip-nav {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-accent-gold);
  color: #000;
  padding: var(--space-2) var(--space-4);
  font-weight: 600;
  z-index: 9999;
  text-decoration: none;
}
.skip-nav:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
}

#main-content {
  scroll-margin-top: 48px;
}

/* ── Header ── */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 48px;
  background-color: var(--color-bg-nav);
  z-index: 999;
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
}

.logo a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text-primary);
}

.logo img {
  height: 35px;
  width: auto;
  filter: invert(1);
  -webkit-filter: invert(1);
}

.site-logo__name {
  font-weight: 700;
  color: var(--color-text-primary);
}

/* ── Navigation ── */
nav {
  margin-left: auto;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-5);
}

nav a {
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: bold;
}

nav a:hover {
  color: var(--color-nav-hover);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-5);
  min-height: 44px;
  font-family: inherit;
  font-size: var(--text-body);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn--primary {
  background: var(--color-btn-bg);
  color: var(--color-text-primary);
  border-color: var(--color-btn-border);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-accent-gold);
  color: #000;
  border-color: var(--color-accent-gold);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent-gold);
  border-color: var(--color-accent-gold);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--color-accent-gold);
  color: #000;
}

/* Legacy button — migrate to .btn system */
.btn_main {
  background-color: var(--color-btn-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-btn-border);
  height: 40px;
  width: 200px;
  padding: 5px;
  text-align: center;
  font-size: 20px;
}

/* ── Book Cards ── */
#books {
  width: 92%;
  max-width: 1200px;
  margin: var(--space-4) auto 100px;
}

#books > h2 {
  text-align: center;
  color: var(--color-accent-gold);
  font-family: "Uncial Antiqua", system-ui;
  font-size: clamp(1.1rem, 3vw, 2rem);
  margin-bottom: 20px;
}

.booksGrid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bookCard {
  display: flex;
  flex-direction: row;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-card);
  align-items: flex-start;
}

.bookCover {
  flex-shrink: 0;
}

.bookCover img {
  display: block;
  height: 130px;
  width: auto;
}

.bookInfo {
  flex: 1;
  min-width: 0;
  font-family: 'Lora', serif;
}

.bookInfo h3 {
  color: var(--color-accent-gold);
  font-size: var(--text-body);
  margin: 0 0 4px;
}

.bookInfo h4 {
  color: var(--color-text-muted);
  font-size: var(--text-small);
  font-weight: normal;
  margin: 0 0 8px;
}

.bookInfo p {
  color: var(--color-text-muted);
  font-size: var(--text-small);
  margin: 0 0 8px;
}

/* ── Gauge ── */
.gauge {
  display: block;
  width: 100%;
  max-width: 200px;
  margin: 4px auto 0;
}

.gauge svg {
  display: block;
  width: 100%;
  height: auto;
}

.gaugeStage {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-caption);
  margin: 0;
}

/* ── Tablet: 768px+ ── */
@media (min-width: 768px) {
  .booksGrid {
    flex-direction: row;
  }

  .bookCard {
    flex: 1;
    flex-direction: column;
    align-items: center;
  }

  .bookCover img {
    height: auto;
    width: 55%;
    max-height: 280px;
    object-fit: contain;
  }

  .bookInfo {
    width: 100%;
  }
}

/* ── Desktop: 1030px+ ── */
@media (min-width: 1030px) {
  #books {
    margin-top: 40px;
  }

  .bookCover img {
    width: 60%;
    max-height: 340px;
  }
}

/* ── Wide: 1440px+ ── */
@media (min-width: 1440px) {
  #books {
    width: 80%;
  }
}

/* ── Other pages ── */
.banner h1 {
  color: var(--color-text-primary);
  font-size: 6rem;
  margin: 0;
}

.bgImage {
  position: fixed;
  top: 0;
  left: 0;
  object-fit: cover;
  z-index: 0;
}

#headshot {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
}

#headshot img {
  width: 33%;
}

#about {
  background-color: #335;
}