/* ============================================================
   components.css — Reusable component styles
   The Way I Learned to Eat Well — Richard D. Edwards
   ============================================================ */

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.nav.scrolled {
  box-shadow: 0 2px 16px rgba(27, 58, 45, 0.08);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav__brand {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.3;
  max-width: 240px;
}

.nav__brand span {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  transform-origin: center;
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav__toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

/* Mobile nav */
.nav__mobile {
  display: none;
  flex-direction: column;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--space-6);
  gap: var(--space-4);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile .nav__link {
  font-size: var(--text-base);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.nav__mobile .nav__link::after {
  display: none;
}

.nav__mobile .btn--primary {
  margin-top: var(--space-2);
  text-align: center;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
}

.btn--primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.btn--primary:active {
  transform: translateY(1px);
}

.btn--primary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn--secondary:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.btn--accent {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn--accent:hover {
  background-color: #b8924a;
  border-color: #b8924a;
}

.btn--accent:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.btn--lg {
  padding: var(--space-4) var(--space-12);
  font-size: var(--text-lg);
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  padding: calc(72px + var(--space-24)) 0 var(--space-24);
  background-color: var(--color-bg);
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.hero__content {
  max-width: 580px;
}

.hero__eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  display: block;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 520px;
}

.hero__tagline {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-8);
  padding: var(--space-4) var(--space-6);
  border-left: 3px solid var(--color-accent);
  background-color: rgba(196, 163, 90, 0.06);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  max-width: 480px;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__book {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__book-img {
  max-width: 320px;
  width: 100%;
  border-radius: var(--border-radius);
  box-shadow: 0 24px 64px rgba(27, 58, 45, 0.2), 0 8px 24px rgba(0,0,0,0.1);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hero__book-img:hover {
  transform: translateY(-6px) rotate(-1deg);
  box-shadow: 0 32px 80px rgba(27, 58, 45, 0.25), 0 12px 32px rgba(0,0,0,0.12);
}

/* ============================================================
   Principle Cards
   ============================================================ */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.principle-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
}

.principle-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.principle-card:hover {
  box-shadow: 0 8px 32px rgba(27, 58, 45, 0.1);
  transform: translateY(-3px);
}

.principle-card:hover::before {
  transform: scaleX(1);
}

.principle-card__number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.35;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.principle-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.principle-card__description {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: none;
}

/* ============================================================
   Social Proof / Testimonials
   ============================================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
}

.testimonial-card__quote {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: none;
}

.testimonial-card__quote::before {
  content: '\201C';
  font-size: var(--text-3xl);
  color: var(--color-accent);
  line-height: 0;
  vertical-align: -0.4em;
  margin-right: 2px;
}

.testimonial-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
}

.testimonial-card__name {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.testimonial-card__detail {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.stat-row {
  display: flex;
  justify-content: center;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-item__number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  line-height: 1;
}

.stat-item__label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  max-width: none;
}

/* ============================================================
   Author Teaser
   ============================================================ */
.author-teaser {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.author-teaser__image {
  position: relative;
}

.author-teaser__img {
  width: 100%;
  border-radius: var(--border-radius-lg);
  object-fit: cover;
  aspect-ratio: 4/5;
  background-color: var(--color-border);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-teaser__img-placeholder {
  width: 100%;
  aspect-ratio: 4/5;
  min-height: 400px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5a42 100%);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
}

.author-teaser__badge {
  position: absolute;
  bottom: -var(--space-6);
  right: -var(--space-6);
  background-color: var(--color-accent);
  color: #ffffff;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(196, 163, 90, 0.3);
}

.author-teaser__content h2 {
  margin-bottom: var(--space-4);
}

.author-teaser__content p {
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.author-teaser__content p:last-of-type {
  margin-bottom: var(--space-8);
}

/* ============================================================
   Email Capture
   ============================================================ */
.email-capture {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5a42 100%);
  color: #ffffff;
  padding: var(--space-24) 0;
}

.email-capture h2 {
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.email-capture p {
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-8);
  font-size: var(--text-lg);
}

.email-form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  flex-wrap: wrap;
}

.email-form__input {
  flex: 1;
  min-width: 200px;
  padding: var(--space-4) var(--space-6);
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: var(--border-radius);
  background-color: rgba(255,255,255,0.1);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  min-height: 44px;
}

.email-form__input::placeholder {
  color: rgba(255,255,255,0.5);
}

.email-form__input:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: rgba(255,255,255,0.15);
}

.email-form__input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.email-form__submit {
  background-color: var(--color-accent);
  color: #ffffff;
  border: 2px solid var(--color-accent);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  min-height: 44px;
}

.email-form__submit:hover {
  background-color: #b8924a;
  border-color: #b8924a;
}

.email-form__submit:active {
  transform: translateY(1px);
}

.email-form__submit:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 3px;
}

.email-form__note {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  margin-top: var(--space-3);
  max-width: none;
}

/* ============================================================
   Section intro block
   ============================================================ */
.section-intro {
  margin-bottom: var(--space-12);
}

.section-intro--center {
  text-align: center;
}

.section-intro--center p {
  margin: var(--space-4) auto 0;
}

.section-intro h2 {
  margin-bottom: var(--space-4);
}

.section-intro p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 600px;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.footer__brand-title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.footer__brand-sub {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  max-width: none;
}

.footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-accent);
}

.footer__nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.footer__contact-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-3);
  transition: opacity var(--transition-fast);
}

.footer__contact-link:hover {
  opacity: 0.8;
}

.footer__contact-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.footer__contact-note {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  max-width: none;
}

.footer__divider {
  border-color: rgba(255,255,255,0.1);
  margin: 0 0 var(--space-8);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copyright {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
  max-width: none;
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

.footer__legal-link {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-fast);
}

.footer__legal-link:hover {
  color: rgba(255,255,255,0.7);
}

/* ============================================================
   Not-a-diet callout banner
   ============================================================ */
.callout-band {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-12) 0;
}

.callout-band__list {
  display: flex;
  justify-content: center;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.callout-band__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
}

.callout-band__item::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

/* ============================================================
   Page header offset (for fixed nav)
   ============================================================ */
.page-offset {
  padding-top: 72px;
}

/* ============================================================
   Responsive — Mobile
   ============================================================ */
@media (max-width: 767px) {
  /* Nav */
  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  /* Hero */
  .hero {
    padding: calc(72px + var(--space-12)) 0 var(--space-12);
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-10);
    text-align: center;
  }

  .hero__content {
    max-width: 100%;
    order: 2;
  }

  .hero__book {
    order: 1;
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__subtitle {
    font-size: var(--text-base);
    margin: 0 auto var(--space-6);
  }

  .hero__tagline {
    margin: 0 auto var(--space-6);
    text-align: left;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .hero__book-img {
    max-width: 240px;
  }

  /* Principles grid */
  .principles-grid {
    grid-template-columns: 1fr;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  /* Author teaser */
  .author-teaser {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Stat row */
  .stat-row {
    gap: var(--space-8);
  }

  /* Callout band */
  .callout-band__list {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 var(--space-6);
    gap: var(--space-4);
  }

  /* Email form */
  .email-form {
    flex-direction: column;
  }

  .email-form__input,
  .email-form__submit {
    width: 100%;
  }
}

/* Tablet */
@media (min-width: 768px) and (max-width: 1023px) {
  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__title {
    font-size: var(--text-4xl);
  }
}

@media (min-width: 1024px) {
  .nav__inner {
    padding: 0 var(--space-8);
  }

  .hero__inner {
    padding: 0 var(--space-8);
  }
}

@media (min-width: 1280px) {
  .nav__inner {
    padding: 0 var(--space-12);
  }
  .hero__inner {
    padding: 0 var(--space-12);
  }
}