/* ==========================================================================
   Landing Page - Livro Amazon
   Design System & Base Styles
   ========================================================================== */

/* --- CSS Variables --- */
:root {
  /* Colors - Finance Theme */
  --color-primary: #1a2332;
  --color-primary-light: #243044;
  --color-primary-dark: #0f1419;
  --color-accent: #f5c518;
  --color-accent-hover: #e6b800;
  --color-accent-soft: rgba(245, 197, 24, 0.14);
  --color-money: #059669;
  --color-money-soft: rgba(5, 150, 105, 0.1);
  --color-amazon: #ff9900;
  --color-amazon-hover: #e88b00;
  --color-amazon-dark: #232f3e;
  --color-success: #059669;
  --color-danger: #ef4444;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-muted: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-warm: #fffbf0;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-pastel-blue: rgba(186, 230, 253, 0.3);
  --color-pastel-pink: rgba(252, 231, 243, 0.35);
  --color-pastel-peach: rgba(254, 243, 199, 0.4);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --line-height: 1.4;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.25rem;
  --space-xl: 1.75rem;
  --space-2xl: 2.5rem;
  --space-3xl: 3rem;
  --space-4xl: 4rem;

  /* Section rhythm */
  --section-padding-y: 3.25rem;
  --section-padding-y-compact: 2.75rem;
  --section-header-gap: 2rem;
  --block-gap: 1.25rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --header-height: 72px;

  /* Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 60px rgba(245, 197, 24, 0.3);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* --- Utilities --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 10000;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay {
  transition-delay: 0.15s;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
  text-align: center;
}

.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: 1.0625rem;
}

.btn--xl {
  padding: 1.25rem 2.5rem;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
}

.btn--amazon {
  background: linear-gradient(135deg, var(--color-amazon) 0%, var(--color-amazon-hover) 100%);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-md), 0 4px 14px rgba(255, 153, 0, 0.35);
}

.btn--amazon:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 6px 20px rgba(255, 153, 0, 0.45);
}

.btn--amazon:active {
  transform: translateY(0);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-alt);
}

/* --- Section Shared --- */
.section {
  padding: var(--section-padding-y) 0;
}

.section--problem {
  background: var(--color-bg-warm);
}

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

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

.section--learn {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-warm) 100%);
  padding-top: calc(var(--section-padding-y) - 0.5rem);
  padding-bottom: calc(var(--section-padding-y) - 0.5rem);
}

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

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

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

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

.section--cta-mid {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, #0f3460 100%);
  padding: var(--section-padding-y-compact) 0;
}

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

.section--cta-final {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  padding-bottom: calc(var(--section-padding-y) + 0.5rem);
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--section-header-gap);
}

.section__label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-hover);
  margin-bottom: var(--block-gap);
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

.section__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.header.is-scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
}

.header__logo i {
  color: var(--color-accent-hover);
  font-size: 1.25rem;
}

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

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header__nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition);
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
}

.header__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

.header__toggle.is-active .header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__toggle.is-active .header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.header__toggle.is-active .header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: auto;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + var(--space-xl));
  padding-bottom: var(--section-padding-y-compact);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 80% 20%, var(--color-pastel-pink) 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 10% 70%, var(--color-pastel-blue) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 50%, var(--color-pastel-peach) 0%, transparent 60%),
    linear-gradient(180deg, #fefefe 0%, #ffffff 100%);
  z-index: 0;
  overflow: hidden;
}

.hero__decor {
  position: absolute;
  color: var(--color-accent);
  opacity: 0.08;
  font-size: 2.5rem;
  pointer-events: none;
}

.hero__decor--1 { top: 15%; right: 10%; animation: float-decor 6s ease-in-out infinite; }
.hero__decor--2 { top: 60%; right: 25%; font-size: 2rem; animation: float-decor 8s ease-in-out infinite 1s; }
.hero__decor--3 { bottom: 20%; left: 8%; font-size: 2.2rem; animation: float-decor 7s ease-in-out infinite 0.5s; }
.hero__decor--4 { top: 30%; left: 15%; font-size: 1.8rem; animation: float-decor 9s ease-in-out infinite 2s; }

@keyframes float-decor {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(5deg); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-primary-dark);
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.hero__description {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-light);
  max-width: 520px;
  margin-bottom: var(--space-lg);
}

.hero__benefits {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: var(--space-lg);
}

.hero__benefits li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
}

.hero__benefits li i {
  color: var(--color-money);
  font-size: 0.875rem;
  flex-shrink: 0;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.hero__trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.hero__trust-item i {
  color: var(--color-accent-hover);
}

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

.hero__book-wrapper {
  position: relative;
  perspective: 1000px;
}

.hero__book-glow {
  position: absolute;
  inset: -20%;
  background: radial-gradient(circle, rgba(245, 197, 24, 0.35) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse-glow 4s ease-in-out infinite;
  z-index: 0;
}

.hero__digital-badge {
  position: absolute;
  top: -12px;
  right: -12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}

.hero__book-img {
  position: relative;
  z-index: 1;
  max-width: 380px;
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  transform: rotateY(-5deg) rotateX(2deg);
  transition: transform var(--transition-slow);
}

.hero__book-wrapper:hover .hero__book-img {
  transform: rotateY(0deg) rotateX(0deg) scale(1.02);
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

/* ==========================================================================
   Problem Section
   ========================================================================== */
.problem__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--block-gap);
  margin-bottom: var(--space-2xl);
}

.problem__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
}

.problem__item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.problem__item-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-money-soft);
  color: var(--color-money);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
}

.problem__item-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: var(--line-height);
}

.problem__solution {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(245, 197, 24, 0.25);
  box-shadow:
    0 20px 50px -20px rgba(15, 20, 25, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  transition: transform var(--transition), box-shadow var(--transition);
}

.problem__solution:hover {
  transform: translateY(-3px);
  box-shadow:
    0 28px 60px -22px rgba(15, 20, 25, 0.6),
    0 0 32px rgba(245, 197, 24, 0.12);
}

.problem__solution-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(245, 197, 24, 0.22) 0%, transparent 42%),
    radial-gradient(circle at 85% 80%, rgba(5, 150, 105, 0.18) 0%, transparent 45%),
    linear-gradient(135deg, #0f1419 0%, #1a2332 45%, #243044 100%);
  z-index: 0;
}

.problem__solution-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  pointer-events: none;
}

.problem__solution-orb--1 {
  width: 180px;
  height: 180px;
  top: -60px;
  right: -40px;
  background: rgba(245, 197, 24, 0.35);
  animation: solution-orb-float 7s ease-in-out infinite;
}

.problem__solution-orb--2 {
  width: 140px;
  height: 140px;
  bottom: -50px;
  left: -30px;
  background: rgba(5, 150, 105, 0.3);
  animation: solution-orb-float 9s ease-in-out infinite reverse;
}

.problem__solution-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.65), transparent 95%);
  opacity: 0.35;
}

.problem__solution-shine {
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    105deg,
    transparent 0%,
    rgba(255, 255, 255, 0.03) 42%,
    rgba(255, 255, 255, 0.14) 50%,
    rgba(255, 255, 255, 0.03) 58%,
    transparent 100%
  );
  transform: skewX(-18deg);
  animation: solution-shine 6s ease-in-out infinite;
}

.problem__solution-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  padding: var(--space-2xl);
}

.problem__solution-icon {
  position: relative;
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, rgba(245, 197, 24, 0.22), rgba(245, 197, 24, 0.08));
  color: var(--color-accent);
  border-radius: var(--radius-lg);
  font-size: 1.75rem;
  border: 1px solid rgba(245, 197, 24, 0.35);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.problem__solution-icon-ring {
  position: absolute;
  inset: -8px;
  border-radius: calc(var(--radius-lg) + 8px);
  border: 1px solid rgba(245, 197, 24, 0.45);
  opacity: 0;
  transform: scale(0.9);
}

.problem__solution.is-visible .problem__solution-icon-ring {
  animation: solution-ring-pulse 2.8s ease-out infinite;
}

.problem__solution.is-visible .problem__solution-icon i {
  animation: solution-icon-pop 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.problem__solution-body {
  flex: 1;
  min-width: 0;
}

.problem__solution-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.35rem 0.75rem;
  margin-bottom: var(--space-md);
  background: rgba(245, 197, 24, 0.14);
  border: 1px solid rgba(245, 197, 24, 0.28);
  border-radius: var(--radius-full);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.problem__solution-label::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px rgba(245, 197, 24, 0.8);
  animation: solution-dot-pulse 2s ease-in-out infinite;
}

.problem__solution-text {
  font-size: clamp(1.0625rem, 2.2vw, 1.25rem);
  font-weight: 500;
  line-height: var(--line-height);
  color: rgba(255, 255, 255, 0.92);
}

@keyframes solution-orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-12px, 10px) scale(1.08); }
}

@keyframes solution-shine {
  0%, 100% { left: -120%; opacity: 0; }
  12% { opacity: 1; }
  45% { left: 140%; opacity: 0; }
}

@keyframes solution-ring-pulse {
  0% { opacity: 0.7; transform: scale(0.92); }
  70% { opacity: 0; transform: scale(1.18); }
  100% { opacity: 0; transform: scale(1.18); }
}

@keyframes solution-icon-pop {
  0% { opacity: 0; transform: scale(0.6) rotate(-8deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

@keyframes solution-dot-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.75; }
}

/* ==========================================================================
   Benefits Grid
   ========================================================================== */
.benefits__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--block-gap);
}

.benefit-card {
  padding: var(--space-xl);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.benefit-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-accent-soft);
}

.benefit-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-money-soft);
  color: var(--color-money);
  border-radius: var(--radius-md);
  font-size: 1.375rem;
  margin-bottom: var(--space-lg);
}

.benefit-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.benefit-card__text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: var(--line-height);
}

/* ==========================================================================
   About Book
   ========================================================================== */
.about-book__inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-2xl);
  align-items: center;
}

.about-book__description {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: var(--line-height);
  margin-bottom: var(--space-lg);
}

.about-book__meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--block-gap) var(--space-lg);
  margin-bottom: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.about-book__meta dt {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.about-book__meta dd {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
}

.about-book__visual {
  display: flex;
  justify-content: center;
}

.about-book__img {
  max-width: 320px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   Learn List
   ========================================================================== */
.learn__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--block-gap);
  max-width: 900px;
  margin: 0 auto;
}

.learn__item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.learn__item:hover {
  border-color: var(--color-success);
  box-shadow: var(--shadow-sm);
}

.learn__item i {
  color: var(--color-money);
  font-size: 1.125rem;
  flex-shrink: 0;
}

/* ==========================================================================
   Audience
   ========================================================================== */
.audience__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--block-gap);
}

.audience__card {
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
}

.audience__card--ideal {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.02) 100%);
  border-color: rgba(16, 185, 129, 0.2);
}

.audience__card--not {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(239, 68, 68, 0.02) 100%);
  border-color: rgba(239, 68, 68, 0.2);
}

.audience__card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.audience__card-header i {
  font-size: 1.5rem;
}

.audience__card--ideal .audience__card-header i {
  color: var(--color-success);
}

.audience__card--not .audience__card-header i {
  color: var(--color-danger);
}

.audience__card-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.audience__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: var(--line-height);
}

.audience__card--ideal .audience__list li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
}

.audience__card--not .audience__list li::before {
  content: '✗';
  color: var(--color-danger);
  font-weight: 700;
  flex-shrink: 0;
}

/* ==========================================================================
   Author
   ========================================================================== */
.author__inner {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-2xl);
  align-items: center;
}

.author__photo-wrapper {
  display: flex;
  justify-content: center;
}

.author__photo {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-xl);
  border: 4px solid var(--color-bg);
}

.author__name {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.author__bio {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: var(--line-height);
  margin-bottom: var(--space-lg);
}

.author__social {
  display: flex;
  gap: var(--space-md);
}

.author__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-light);
  font-size: 1.125rem;
  transition: all var(--transition);
}

.author__social a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ==========================================================================
   Testimonials Slider
   ========================================================================== */
.testimonials__slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonials__track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
  flex: 0 0 100%;
  padding: var(--space-md);
}

.testimonial-card__inner {
  padding: var(--space-xl);
  background: var(--color-bg-alt);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  text-align: center;
}

.testimonial-card__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto var(--space-lg);
  object-fit: cover;
}

.testimonial-card__stars {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: var(--space-md);
  color: var(--color-amazon);
  font-size: 0.875rem;
}

.testimonial-card__text {
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--color-text);
  line-height: var(--line-height);
  margin-bottom: var(--space-lg);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.testimonial-card__name {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1rem;
}

.testimonials__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.testimonials__btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-primary);
  transition: all var(--transition);
}

.testimonials__btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.testimonials__dots {
  display: flex;
  gap: var(--space-sm);
}

.testimonials__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  transition: all var(--transition);
  padding: 0;
}

.testimonials__dot.is-active {
  background: var(--color-accent-hover);
  transform: scale(1.2);
}

/* ==========================================================================
   Amazon Rating
   ========================================================================== */
.amazon-rating__card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xl);
  align-items: center;
  padding: var(--space-2xl);
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-lg);
}

.amazon-rating__score {
  margin: var(--space-lg) 0;
}

.amazon-rating__number {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.amazon-rating__stars {
  display: flex;
  gap: 4px;
  margin: var(--space-sm) 0;
  color: var(--color-amazon);
  font-size: 1.25rem;
}

.amazon-rating__reviews {
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.amazon-rating__text {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  max-width: 480px;
}

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

.amazon-rating__icon {
  font-size: 6rem;
  color: var(--color-amazon);
  opacity: 0.15;
}

/* ==========================================================================
   CTA Mid
   ========================================================================== */
.cta-mid__inner {
  text-align: center;
}

.cta-mid__urgency {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(245, 197, 24, 0.2);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.cta-mid__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-md);
}

.cta-mid__text {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq__list {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  transition: color var(--transition);
}

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

.faq__question i {
  flex-shrink: 0;
  font-size: 0.875rem;
  transition: transform var(--transition);
  color: var(--color-text-muted);
}

.faq__item.is-open .faq__question i {
  transform: rotate(180deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq__answer-inner {
  padding-bottom: var(--space-lg);
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: var(--line-height);
}

/* ==========================================================================
   CTA Final
   ========================================================================== */
.cta-final__inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2xl);
  align-items: center;
  padding: var(--space-2xl);
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-lg);
}

.cta-final__img {
  max-width: 200px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
}

.cta-final__title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.cta-final__text {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  max-width: 500px;
}

.cta-final__guarantee {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.cta-final__guarantee i {
  color: var(--color-accent-hover);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.125rem;
  color: #fff;
  margin-bottom: var(--space-md);
}

.footer__logo i {
  color: var(--color-accent);
}

.footer__tagline {
  font-size: 0.875rem;
  line-height: var(--line-height);
  max-width: 280px;
}

.footer__nav-title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  margin-bottom: var(--space-lg);
}

.footer__nav-list li {
  margin-bottom: var(--space-sm);
}

.footer__nav-list a {
  font-size: 0.875rem;
  transition: color var(--transition);
}

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

.footer__social {
  display: flex;
  gap: var(--space-sm);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition);
}

.footer__social a:hover {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__copyright {
  font-size: 0.8125rem;
  margin-bottom: var(--space-sm);
}

.footer__disclaimer {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Back to Top
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 999;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-hover);
  color: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* ==========================================================================
   Star Rating Utility
   ========================================================================== */
.stars {
  display: inline-flex;
  gap: 2px;
}

.stars .fa-solid {
  color: var(--color-amazon);
}

.stars .fa-regular {
  color: var(--color-border);
}