/* ===== Custom Properties ===== */
:root {
  --color-primary: #1a3a5c;
  --color-primary-light: #2d5f8a;
  --color-accent: #8b6914;
  --color-accent-light: #b8922e;
  --color-accent-bright: #d4a942;
  --color-bg: #fafafa;
  --color-bg-alt: #f0f0f0;
  --color-text: #222;
  --color-text-light: #555;
  --color-white: #fff;
  --color-border: #ddd;
  --color-success: #2e7d32;
  --color-warning: #f9a825;
  --color-error: #c62828;
  --color-error-light: #ffebee;
  --font-heading: Georgia, "Times New Roman", serif;
  --font-body: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --max-width: 960px;
  --nav-height: 60px;
}

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

/* ===== Base ===== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.3;
}

a {
  color: var(--color-primary-light);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  z-index: 1000;
  border-radius: 0 0 4px 4px;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* ===== Navigation ===== */
.site-nav {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.site-nav__logo {
  color: var(--color-white);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: bold;
}

.site-nav__logo:hover {
  color: var(--color-accent-light);
}

.nav-toggle-checkbox {
  display: none;
}

.nav-toggle-label {
  display: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.site-nav__links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.site-nav__links a {
  color: var(--color-white);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.5rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

.site-nav__links a:hover,
.site-nav__links a[aria-current="page"] {
  border-bottom-color: var(--color-accent-light);
  color: var(--color-white);
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
  }

  .site-nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-primary);
    padding: 1rem;
    gap: 0;
  }

  .site-nav__links li {
    border-top: 1px solid var(--color-primary-light);
  }

  .site-nav__links a {
    display: block;
    padding: 0.75rem 1rem;
    border-bottom: none;
  }

  .nav-toggle-checkbox:checked ~ .site-nav__links {
    display: flex;
  }
}

/* ===== Main Content ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  flex: 1;
}

/* ===== Page Header ===== */
.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-border);
}

.page-header h1 {
  font-size: 2rem;
  color: var(--color-primary);
}

/* ===== Hero (Home page) ===== */
.hero {
  padding: 3rem 1rem;
  background: var(--color-primary);
  color: var(--color-white);
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: center;
}

.hero__portrait {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-accent-light);
  flex-shrink: 0;
}

.hero__text {
  text-align: left;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.hero__subtitle {
  font-size: 1.2rem;
  color: var(--color-accent-bright);
  margin-bottom: 1rem;
}

.hero__tagline {
  font-size: 1rem;
  max-width: 65ch;
  opacity: 0.9;
}

@media (max-width: 600px) {
  .hero__inner {
    flex-direction: column;
    text-align: center;
  }

  .hero__text {
    text-align: center;
  }

  .hero__portrait {
    width: 140px;
    height: 140px;
  }
}

/* ===== CTA Cards (Home page) ===== */
.cta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.cta-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1.5rem;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow 0.2s, transform 0.2s;
}

.cta-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
  color: var(--color-text);
}

.cta-card h2 {
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.cta-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ===== Biography Sections ===== */
.bio-section {
  margin-bottom: 2rem;
}

.bio-section h2 {
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.bio-section p {
  max-width: 65ch;
}

.bio-section p + p {
  margin-top: 0.75rem;
}

.bio-section ul {
  list-style: disc;
  list-style-position: outside;
  padding-left: 1.25rem;
  margin-left: 0;
}

.bio-section li {
  margin-bottom: 0.25rem;
}

/* ===== Contact ===== */
.contact-info {
  margin-bottom: 2rem;
}

.contact-info dt {
  font-weight: bold;
  color: var(--color-primary);
  margin-top: 1rem;
}

.contact-info dd {
  margin-left: 0;
}

.mailto-link {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-size: 1rem;
  margin-top: 1rem;
  min-height: 44px;
  transition: background 0.2s;
}

.mailto-link:hover {
  background: var(--color-primary-light);
  color: var(--color-white);
}

/* ===== Forms (Report Issue) ===== */
.form-group {
  margin-bottom: 1.5rem;
  max-width: 65ch;
}

.form-group label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.25rem;
  color: var(--color-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 1rem;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-submit {
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  min-height: 44px;
  transition: background 0.2s;
}

.form-submit:hover {
  background: var(--color-primary-light);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.9rem;
  margin-top: auto;
}

.site-footer a {
  color: var(--color-accent-light);
}

/* ===== Primary CTA Card (Home page) ===== */
.cta-card--primary {
  border: 2px solid var(--color-primary);
  box-shadow: 0 2px 8px rgba(26, 58, 92, 0.12);
}

.cta-card--primary h2 {
  font-size: 1.5rem;
}

.cta-card--primary p::after {
  content: " Browse Books \2192";
  font-weight: bold;
  color: var(--color-primary);
}

.cta-card--primary:hover {
  box-shadow: 0 6px 16px rgba(26, 58, 92, 0.18);
  transform: translateY(-3px);
}

/* ===== Focus States ===== */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.site-nav__links a:focus-visible,
.site-nav__logo:focus-visible {
  outline-color: var(--color-white);
}

.nav-toggle-label:focus-visible {
  outline-color: var(--color-white);
}

.cta-card:focus-visible {
  outline-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.form-group input:focus-visible,
.form-group textarea:focus-visible,
.form-group select:focus-visible {
  outline-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
}

.form-submit:focus-visible,
.mailto-link:focus-visible,
.book-card__buy-link:focus-visible {
  outline-color: var(--color-accent);
}

.skip-link:focus-visible {
  outline-color: var(--color-white);
}

/* ===== Form Validation ===== */
.form-field--invalid {
  border-color: var(--color-error) !important;
  background-color: var(--color-error-light);
}

.form-error {
  color: var(--color-error);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.form-success {
  text-align: center;
  padding: 2rem;
  border: 2px solid var(--color-success);
  border-radius: 6px;
  background: var(--color-white);
  max-width: 480px;
  margin: 2rem auto;
}

.form-success h2 {
  color: var(--color-success);
  margin-bottom: 0.5rem;
}

.form-success a {
  display: inline-block;
  margin-top: 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  min-height: 44px;
}