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

:root {
  --color-bg:        #0d0d0d;
  --color-bg-alt:    #141414;
  --color-surface:   #1a1a1a;
  --color-border:    #2a2a2a;

  --color-gold:      #c9a84c;
  --color-gold-light:#e8c97a;
  --color-gold-dark: #9a7a30;

  --color-text:      #e8e0d0;
  --color-text-muted:#9a9080;
  --color-white:     #ffffff;

  --font-serif:      Georgia, 'Times New Roman', serif;
  --font-sans:       'Segoe UI', system-ui, -apple-system, sans-serif;

  --radius:          8px;
  --radius-lg:       16px;

  --section-gap:     4rem;
  --container-max:   960px;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
}

a {
  color: var(--color-gold);
  text-decoration: none;
}

a:hover {
  color: var(--color-gold-light);
  text-decoration: underline;
}

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

/* =============================================
   LAYOUT
   ============================================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: var(--section-gap) 0;
}

.section--dark {
  background-color: var(--color-bg-alt);
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--color-gold);
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
}

.section__title::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: var(--color-gold-dark);
  margin: 0.5rem auto 0;
}

/* =============================================
   PLACEHOLDERS
   ============================================= */
.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--color-gold-dark);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-style: italic;
  text-align: center;
}

.placeholder--cover {
  width: 220px;
  height: 320px;
  flex-shrink: 0;
}

.placeholder--author {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  flex-shrink: 0;
}

.hero__cover {
  width: 220px;
  height: auto;
  flex-shrink: 0;
  border-radius: var(--radius);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(201, 168, 76, 0.2);
}

.author__photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--color-gold-dark);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.placeholder--qrcode {
  width: 180px;
  height: 180px;
  border-radius: var(--radius);
}

.buy__qrcode {
  width: 200px;
  height: 200px;
  border-radius: var(--radius);
  border: 3px solid var(--color-gold-dark);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.1s;
  text-decoration: none;
  line-height: 1;
}

.btn--primary {
  background: var(--color-gold);
  color: #0d0d0d;
}

.btn--primary:hover {
  background: var(--color-gold-light);
  color: #0d0d0d;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn--large {
  padding: 1rem 2.25rem;
  font-size: 1.1rem;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  background: linear-gradient(160deg, #0a0a0a 0%, #1a1208 60%, #0d0d0d 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 3.5rem 0 4rem;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
}

.hero__label {
  display: inline-block;
  background: var(--color-gold-dark);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 0.75rem;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 7vw, 3.2rem);
  color: var(--color-white);
  line-height: 1.15;
}

.hero__subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 3.5vw, 1.5rem);
  color: var(--color-gold);
  margin-top: 0.25rem;
  font-style: italic;
}

.hero__tagline {
  max-width: 500px;
  color: var(--color-text-muted);
  margin: 0.75rem auto 0;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.hero__content .btn {
  margin-top: 1rem;
}

/* =============================================
   MESSAGE
   ============================================= */
.message__card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-gold-dark);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  position: relative;
}

.message__quote {
  font-family: var(--font-serif);
  font-size: 6rem;
  color: var(--color-gold-dark);
  line-height: 0.5;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.message__body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 1.05rem;
  line-height: 1.8;
}

.message__body strong {
  color: var(--color-gold-light);
}

.message__signature {
  margin-top: 1.5rem;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-gold);
  font-size: 1rem;
  text-align: right;
}

/* =============================================
   ABOUT
   ============================================= */
.about__text {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 1.05rem;
}

.about__text strong {
  color: var(--color-gold-light);
}

/* =============================================
   TOPICS
   ============================================= */
.topics__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.topic-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.topic-card:hover {
  border-color: var(--color-gold-dark);
}

.topic-card__icon {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.topic-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-gold-light);
  margin-bottom: 0.4rem;
}

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

/* =============================================
   AUDIENCE
   ============================================= */
.audience__list {
  list-style: none;
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.audience__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1.05rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}

.audience__check {
  color: var(--color-gold);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* =============================================
   AUTHOR
   ============================================= */
.author__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.author__name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-gold-light);
  margin-bottom: 0.75rem;
}

.author__bio {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.author__bio strong {
  color: var(--color-gold-light);
}

/* =============================================
   BUY
   ============================================= */
.buy__desc {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.buy__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.buy__info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.buy__price {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.buy__price-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.buy__price-value {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-gold);
  line-height: 1;
}

.buy__price-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.buy__benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
}

.buy__benefits li {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.buy__benefits li::first-letter {
  color: var(--color-gold);
  font-weight: 700;
}

.buy__pix {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.buy__pix-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

.buy__pix-key {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

.buy__pix-key strong {
  color: var(--color-gold-light);
}

.buy__pix-phone {
  font-size: 1.2rem;
  color: var(--color-gold);
  text-align: center;
}

.buy__pix-instructions {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
  max-width: 220px;
  line-height: 1.6;
}

.buy__pix-instructions strong {
  color: var(--color-text);
}

.btn--whatsapp {
  background: #25d366;
  color: #fff;
  font-size: 0.9rem;
  padding: 0.65rem 1.25rem;
}

.btn--whatsapp:hover {
  background: #1ebe5d;
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: #080808;
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  text-align: center;
}

.footer p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 2;
}

.footer a {
  color: var(--color-gold-dark);
}

.footer__small {
  font-size: 0.8rem;
}

/* =============================================
   TABLET (≥ 640px)
   ============================================= */
@media (min-width: 640px) {
  .topics__grid {
    grid-template-columns: 1fr 1fr;
  }

  .buy__inner {
    flex-direction: row;
    align-items: flex-start;
    justify-content: center;
  }

  .buy__info {
    align-items: flex-start;
    text-align: left;
  }
}

/* =============================================
   DESKTOP (≥ 800px)
   ============================================= */
@media (min-width: 800px) {
  .hero__inner {
    flex-direction: row;
    text-align: left;
    gap: 3rem;
    align-items: center;
  }

  .hero__content {
    align-items: flex-start;
  }

  .hero__tagline {
    margin: 0.75rem 0 0;
  }

  .topics__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .author__inner {
    flex-direction: row;
    text-align: left;
  }
}