/* ==========================================================================
   VITALFORGE — MAIN STYLESHEET
   Project: Fitness, Health & Wellness Authority Blog
   Stack: HTML5 + CSS3 + Vanilla JavaScript (no frameworks)
   Approach: Mobile First / Token-based Design System
   ========================================================================== */


/* ==========================================================================
   1. RESET / NORMALIZE
   A lean, modern reset with no dependency on external libraries.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* Respects the user's preference for reduced motion (accessibility) */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ==========================================================================
   2. DESIGN TOKENS (CSS Variables)
   Single source of truth for colors, typography, spacing, and effects.
   ========================================================================== */

:root {
  /* ==========================================================================
     OFFICIAL VITALFORGE BRAND TOKENS
     Source: VitalForge Brand Kit (logotype, palette, typography — official)
     ========================================================================== */

  /* ---- Colors: Neutrals ---- */
  --color-white: #FFFFFF;
  --color-gray-50: #F4F6F8;    /* Ice Grey — official */
  --color-gray-100: #E1E4E8;   /* Border Grey — official */
  --color-gray-500: #6E6E6E;   /* Accessible secondary-text grey, derived from the
                                   brand's "Text Muted" (#8A8A8A) family: official
                                   Text Muted only reaches 3.45:1 on white, which
                                   fails WCAG AA for body-sized text. This tone keeps
                                   the same neutral family while reaching 5.1:1. */
  --color-black: #4A4A4A;      /* Graphite — official body-text color */

  /* ---- Colors: Brand Identity ---- */
  --color-navy: #0A2540;       /* Navy — official: headings, icons, authority elements */
  --color-navy-dark: #071A2E;  /* Navy Dark — official: large dark-surface fills (footer, deep sections) */
  --color-navy-light: #12365C; /* Navy Soft — official: tags, soft dark surfaces */

  /* ---- Colors: Action (Teal — used exclusively for CTAs, per brand guidelines) ---- */
  --color-green: #00A99D;      /* Teal — official brand accent. Reserved for the logo,
                                   thin accents/borders on tinted backgrounds, and data
                                   highlights — NOT for white text on a solid fill (see below). */
  --color-green-dark: #007A72; /* Accessible action color for solid CTA buttons.
                                   Official Teal (#00A99D) is only 2.93:1 with white text,
                                   and even official Teal Hover (#00867D) falls just short
                                   at 4.46:1. This is the same hue, darkened to 5.22:1
                                   so primary buttons meet WCAG AA. */
  --color-green-darker: #00655E; /* Hover/active state for the above, ~6.9:1 */
  --color-green-tint: #E4F5F4; /* Teal Tint 10% — official */

  /* ---- Colors: Feedback ---- */
  --color-error: #B3261E;

  /* ---- Tipografia ---- */
  --font-display: 'Poppins', 'Segoe UI', Arial, sans-serif;
  --font-body: 'Inter', 'Segoe UI', Arial, sans-serif;

  --fs-xs: 0.75rem;     /* 12px — matches official "label" token */
  --fs-sm: 0.875rem;    /* 14px */
  --fs-base: 1rem;      /* 16px */
  --fs-md: 1.125rem;    /* 18px */
  --fs-lg: 1.375rem;    /* 22px */
  --fs-xl: 1.75rem;     /* 28px */
  --fs-2xl: 2.25rem;    /* 36px */
  --fs-3xl: 3rem;       /* 48px */

  --lh-tight: 1.2;
  --lh-normal: 1.5;
  --lh-relaxed: 1.7;

  /* ---- Spacing (8px base scale) ---- */
  --space-1: 0.5rem;   /* 8px */
  --space-2: 0.75rem;  /* 12px */
  --space-3: 1rem;     /* 16px */
  --space-4: 1.5rem;   /* 24px */
  --space-5: 2rem;     /* 32px */
  --space-6: 3rem;     /* 48px */
  --space-7: 4rem;     /* 64px */
  --space-8: 6rem;     /* 96px */
  --space-9: 8rem;     /* 128px */

  /* ---- Layout ---- */
  --container-max: 1320px;
  --container-padding: 1.25rem;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-full: 999px;

  /* ---- Shadows (subtle, nearly imperceptible use) ---- */
  --shadow-sm: 0 1px 2px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.08);

  /* ---- Transitions ---- */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* ---- Header ---- */
  --header-height: 76px;
}


/* ==========================================================================
   3. TIPOGRAFIA BASE
   ========================================================================== */

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-black);
  background-color: var(--color-white);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600; /* SemiBold — Poppins Bold/700 is reserved for the logotype only */
  line-height: var(--lh-tight);
  color: var(--color-black);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

@media (min-width: 768px) {
  h1 { font-size: var(--fs-3xl); }
  h2 { font-size: var(--fs-2xl); }
  h3 { font-size: var(--fs-xl); }
}

p {
  color: var(--color-black);
}

.text-muted {
  color: var(--color-gray-500);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-navy);
}

/* Visible focus state for accessibility (never removed, only restyled) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-navy);
  outline-offset: 3px;
  border-radius: 4px;
}


/* ==========================================================================
   4. LAYOUT / CONTAINER / GRID UTILITIES
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

section {
  padding-block: var(--space-7);
}

.section--alt {
  background-color: var(--color-gray-50);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-6);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (min-width: 768px) {
  section { padding-block: var(--space-8); }
}


/* ==========================================================================
   5. HEADER / NAVIGATION
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-gray-100);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.logo img {
  display: block;
  height: 40px;
  width: auto;
}

/* Footer logo uses the white monochrome version (dark background) — slightly
   taller since it's icon+wordmark stacked at the same optical weight */
.footer-brand .logo img {
  height: 36px;
}

.main-nav {
  display: none;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.main-nav__link {
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-black);
  transition: color var(--transition-fast);
}

.main-nav__link:hover,
.main-nav__link[aria-current="page"] {
  color: var(--color-navy);
}

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

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  color: var(--color-black);
  transition: background-color var(--transition-fast);
}

.icon-btn:hover {
  background-color: var(--color-gray-50);
}

.menu-toggle {
  display: inline-flex;
}

@media (min-width: 1024px) {
  .main-nav { display: block; }
  .menu-toggle { display: none; }
}

/* Expandable search field in the header */
.search-bar {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  padding: var(--space-4) var(--container-padding);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.search-bar.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.search-bar__form {
  max-width: var(--container-max);
  margin-inline: auto;
  display: flex;
  gap: var(--space-2);
}

.search-bar__input {
  flex: 1;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-base);
}

/* Menu mobile off-canvas */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 200;
  visibility: hidden;
}

.mobile-nav.is-open {
  visibility: visible;
}

.mobile-nav__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(7, 26, 46, 0.6);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav.is-open .mobile-nav__overlay {
  opacity: 1;
}

.mobile-nav__panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(320px, 84vw);
  background-color: var(--color-white);
  padding: var(--space-4);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.mobile-nav.is-open .mobile-nav__panel {
  transform: translateX(0);
}

.mobile-nav__head {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-5);
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav__link {
  display: block;
  padding: var(--space-3) var(--space-2);
  font-size: var(--fs-md);
  font-weight: 600;
  border-radius: var(--radius-sm);
  color: var(--color-black);
}

.mobile-nav__link:hover {
  background-color: var(--color-gray-50);
  color: var(--color-navy);
}

.mobile-nav__cta {
  margin-top: auto;
}


/* ==========================================================================
   6. BUTTONS
   Green is used exclusively for actions (CTAs), per brand guidelines.
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.875rem 1.75rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

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

.btn--primary {
  /* Accessible derivative of the official Teal (#00A99D), used to
     guarantee a minimum 4.5:1 contrast ratio with white text (WCAG 2.1 AA) —
     see the token comment above for the full rationale. */
  background-color: var(--color-green-dark);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-green-darker);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-navy);
}

.btn--outline:hover {
  background-color: var(--color-green-tint);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-black);
  border: 1.5px solid var(--color-gray-100);
}

.btn--ghost:hover {
  border-color: var(--color-navy);
}

.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--fs-xs);
}

.btn--block {
  width: 100%;
}


/* ==========================================================================
   7. BADGES / TAGS
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-navy);
  color: var(--color-navy);
  background-color: var(--color-green-tint);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-100);
  color: var(--color-gray-500);
  background-color: var(--color-white);
  transition: all var(--transition-fast);
}

.chip:hover {
  border-color: var(--color-navy);
  color: var(--color-navy);
}

.chip.is-active {
  background-color: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-white);
}


/* ==========================================================================
   8. HERO
   ========================================================================== */

.hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 70vh;
  padding-top: calc(var(--header-height) + var(--space-6));
  padding-bottom: var(--space-7);
  color: var(--color-white);
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 26, 46, 0.15) 0%, rgba(7, 26, 46, 0.8) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__title {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.88);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-5);
  max-width: 560px;
}

/* More compact institutional hero (internal pages / pillar pages) */
.hero--compact {
  min-height: 42vh;
  align-items: center;
  text-align: left;
}


/* ==========================================================================
   9. CARDS
   ========================================================================== */

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-gray-50);
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.card:hover .card__media img {
  transform: scale(1.04);
}

.card__badge {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
}

.card__body {
  padding-top: var(--space-3);
}

.card__title {
  font-size: var(--fs-md);
  margin-bottom: var(--space-1);
}

.card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.card__title a {
  position: relative;
}

.card__excerpt {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2);
}

.card__meta {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  color: var(--color-gray-500);
}

.card__meta .dot::before {
  content: "•";
  margin-right: var(--space-2);
}

/* Card em destaque (maior, usado no topo da listagem) */
.card--featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.card--featured .card__media {
  aspect-ratio: 16 / 9;
}

@media (min-width: 768px) {
  .card--featured {
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
  }

  .card--featured .card__media {
    aspect-ratio: 4 / 3;
  }
}

/* Product card (editorial recommendation, no e-commerce styling) */
.product-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.product-card__media {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: var(--color-gray-50);
}

.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card__category {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-navy);
}

.product-card__note {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
  flex: 1;
}


/* ==========================================================================
   10. CONTENT PILLARS (category grid on the home page)
   ========================================================================== */

.pillar-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  color: var(--color-white);
}

.pillar-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.pillar-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,30,58,0) 40%, rgba(11,30,58,0.85) 100%);
}

.pillar-card:hover img {
  transform: scale(1.05);
}

.pillar-card__content {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 1;
  padding: var(--space-4);
}

.pillar-card__title {
  color: var(--color-white);
  font-size: var(--fs-md);
  margin-bottom: var(--space-1);
}

.pillar-card__link {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.pillar-card a.stretched::after {
  content: "";
  position: absolute;
  inset: 0;
}


/* ==========================================================================
   11. FAIXA DE CREDIBILIDADE
   ========================================================================== */

.trust-bar {
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-gray-100);
  border-bottom: 1px solid var(--color-gray-100);
}

.trust-bar__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-6);
}

.trust-bar__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-gray-500);
}

.trust-bar__item svg {
  width: 20px;
  height: 20px;
  color: var(--color-navy);
}


/* ==========================================================================
   12. AUTORIDADE / METODOLOGIA / AUTOR
   ========================================================================== */

.authority {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

@media (min-width: 1024px) {
  .authority {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }
}

.authority__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.authority__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.authority__list {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.authority__list li {
  display: flex;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
}

.authority__list svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-green-dark);
  margin-top: 2px;
}

.author-box {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
}

.author-box__avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  overflow: hidden;
  flex-shrink: 0;
}

.author-box__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-box__name {
  font-size: var(--fs-md);
  margin-bottom: 2px;
}

.author-box__role {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
}


/* ==========================================================================
   13. NEWSLETTER (the one section with a bold background color, intentionally)
   ========================================================================== */

.newsletter {
  background-color: var(--color-navy-dark);
  color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-4);
  text-align: center;
}

.newsletter__title {
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.newsletter__subtitle {
  color: rgba(255,255,255,0.8);
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.newsletter__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 440px;
  margin-inline: auto;
}

@media (min-width: 640px) {
  .newsletter__form {
    flex-direction: row;
  }
}

.newsletter__input {
  flex: 1;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-sm);
  border: none;
  font-size: var(--fs-base);
}

.newsletter__note {
  margin-top: var(--space-2);
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.65);
}

.form-status {
  margin-top: var(--space-2);
  font-size: var(--fs-sm);
  min-height: 1.2em;
}

.form-status.is-success { color: #7BD9A0; }
.form-status.is-error { color: #F0A6A1; }


/* ==========================================================================
   14. ARTIGO (single post)
   ========================================================================== */

.article-header {
  padding-top: calc(var(--header-height) + var(--space-6));
  padding-bottom: var(--space-5);
}

.article-header__title {
  margin-block: var(--space-3);
  max-width: 900px;
}

.article-header__excerpt {
  font-size: var(--fs-md);
  color: var(--color-gray-500);
  max-width: 700px;
  margin-bottom: var(--space-4);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  border-top: 1px solid var(--color-gray-100);
  padding-top: var(--space-3);
}

.article-meta__author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-black);
  font-weight: 600;
}

.article-meta__avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.article-meta__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-cover {
  border-radius: var(--radius-md);
  overflow: hidden;
  max-height: 560px;
  aspect-ratio: 16 / 8;
  background-color: var(--color-gray-50);
  margin-bottom: var(--space-7);
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-layout {
  display: grid;
  gap: var(--space-7);
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: minmax(0, 720px) minmax(240px, 1fr);
  }
}

/* Body copy — optimized for long-form reading */
.article-body h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-body h3 {
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.article-body p {
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-3);
}

.article-body ul,
.article-body ol {
  margin-bottom: var(--space-3);
  padding-left: var(--space-4);
}

.article-body li {
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-1);
  list-style: disc;
}

.article-body ol li {
  list-style: decimal;
}

.article-body img {
  border-radius: var(--radius-md);
  margin-block: var(--space-4);
}

.article-body blockquote {
  border-left: 3px solid var(--color-navy);
  padding-left: var(--space-4);
  margin-block: var(--space-4);
  font-size: var(--fs-md);
  font-style: italic;
  color: var(--color-navy);
}

/* Caixa de destaque dentro do artigo */
.callout {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-block: var(--space-4);
  display: flex;
  gap: var(--space-3);
}

.callout svg {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-navy);
}

.callout__title {
  font-size: var(--fs-base);
  margin-bottom: 4px;
}

.callout p {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  margin-bottom: 0;
}

/* Aside / sidebar do artigo */
.article-aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.toc {
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.toc__title {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-gray-500);
  margin-bottom: var(--space-2);
}

.toc__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.toc__link {
  font-size: var(--fs-sm);
  color: var(--color-black);
  padding: 0.375rem 0;
  border-left: 2px solid transparent;
  padding-left: var(--space-2);
  transition: all var(--transition-fast);
}

.toc__link:hover,
.toc__link.is-active {
  color: var(--color-navy);
  border-left-color: var(--color-green-dark);
}

/* Barra de progresso de leitura */
.reading-progress {
  position: fixed;
  top: var(--header-height);
  left: 0;
  height: 3px;
  width: 0%;
  background-color: var(--color-green-dark);
  z-index: 99;
  transition: width 100ms linear;
}

/* Floating "back to top" button */
.back-to-top {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--color-navy);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 90;
}

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


/* ==========================================================================
   15. FAQ (accordion)
   ========================================================================== */

.accordion__item {
  border-bottom: 1px solid var(--color-gray-100);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-base);
}

.accordion__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
}

.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  background-color: var(--color-navy);
  transition: transform var(--transition-base);
}

.accordion__icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.accordion__icon::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.accordion__item.is-open .accordion__icon::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion__panel p {
  padding-bottom: var(--space-4);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
}


/* ==========================================================================
   16. FORMS (Contact)
   ========================================================================== */

.form-field {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-green-dark);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-green-tint);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

.form-error {
  display: none;
  font-size: var(--fs-xs);
  color: var(--color-error);
  margin-top: 0.375rem;
}

.form-field.has-error .form-input,
.form-field.has-error .form-textarea {
  border-color: var(--color-error);
}

.form-field.has-error .form-error {
  display: block;
}


/* ==========================================================================
   17. FOOTER
   ========================================================================== */

.site-footer {
  background-color: var(--color-navy-dark);
  color: rgba(255, 255, 255, 0.75);
  padding-block: var(--space-7) var(--space-5);
}

.footer-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
}

.footer-brand .logo {
  color: var(--color-white);
}

.footer-brand p {
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.65);
  max-width: 280px;
  line-height: var(--lh-relaxed);
}

.footer-social {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--color-green-dark);
  border-color: var(--color-green-dark);
}

.footer-col__title {
  color: var(--color-white);
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col__list a {
  font-size: var(--fs-sm);
  transition: color var(--transition-fast);
}

.footer-col__list a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: var(--space-4);
  text-align: center;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.5);
}


/* ==========================================================================
   18. PAGINATION
   ========================================================================== */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-7);
}

.pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-black);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-fast);
}

.pagination__link:hover {
  border-color: var(--color-navy);
  color: var(--color-navy);
}

.pagination__link.is-active {
  background-color: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-white);
}


/* ==========================================================================
   19. INSTITUTIONAL PAGES (About, Privacy, Terms)
   ========================================================================== */

.legal-content h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.legal-content p,
.legal-content li {
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2);
}

.legal-content ul {
  padding-left: var(--space-4);
}

.legal-content li {
  list-style: disc;
}

.legal-updated {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-6);
}

.team-grid {
  margin-top: var(--space-5);
}

.team-card {
  text-align: center;
}

.team-card__avatar {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-inline: auto;
  margin-bottom: var(--space-3);
}

.team-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card__name {
  font-size: var(--fs-md);
}

.team-card__role {
  font-size: var(--fs-sm);
  color: var(--color-green-dark);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.team-card__bio {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
}


/* ==========================================================================
   20. FINAL UTILITIES
   ========================================================================== */

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: var(--space-2); }
.mt-6 { margin-top: var(--space-6); }
.text-center { text-align: center; }

/* Skeleton de carregamento (evita CLS enquanto imagens carregam) */
.skeleton {
  background: linear-gradient(90deg, var(--color-gray-50) 25%, var(--color-gray-100) 50%, var(--color-gray-50) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.4s ease infinite;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Subtle reveal animation on scroll */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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


/* ==========================================================================
   21. MAIN BANNER (featured stats/credibility strip)
   ========================================================================== */

.stats-banner {
  background-color: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-4);
}

.stats-banner__grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(2, 1fr);
  text-align: center;
}

@media (min-width: 768px) {
  .stats-banner__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stats-banner__number {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-2xl);
  color: var(--color-white);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stats-banner__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}


/* ==========================================================================
   22. BENEFITS OF EXERCISE (icon cards)
   ========================================================================== */

.benefit-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

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

.benefit-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-green-tint);
  color: var(--color-green-dark);
}

.benefit-card__icon svg {
  width: 24px;
  height: 24px;
}

.benefit-card__title {
  font-size: var(--fs-md);
}

.benefit-card__text {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
}


/* ==========================================================================
   23. "ABOUT" TEASER (condensed version used on the Home page)
   ========================================================================== */

.about-teaser {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

@media (min-width: 1024px) {
  .about-teaser {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }

  .about-teaser--reverse .about-teaser__media {
    order: 2;
  }
}

.about-teaser__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.about-teaser__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}


/* ==========================================================================
   24. BLOG PAGE — Featured search field and header
   ========================================================================== */

.blog-hero {
  padding-top: calc(var(--header-height) + var(--space-6));
  padding-bottom: var(--space-5);
  background-color: var(--color-gray-50);
}

.blog-search {
  position: relative;
  max-width: 560px;
  margin-top: var(--space-5);
}

.blog-search__icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-500);
  pointer-events: none;
}

.blog-search__input {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-full);
  font-size: var(--fs-base);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.blog-search__input:focus {
  outline: none;
  border-color: var(--color-navy);
}

/* Categories as horizontally scrollable tabs (mobile) */
.category-tabs {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-1);
  scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.category-tabs .chip {
  flex-shrink: 0;
}

/* "Read More" link on article cards */
.card__footer {
  margin-top: var(--space-3);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.card__link:hover {
  gap: 0.625rem;
  color: var(--color-green-dark);
}

.card__link svg {
  width: 16px;
  height: 16px;
}


/* ==========================================================================
   25. COMPARTILHAMENTO SOCIAL
   ========================================================================== */

.share-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.share-bar__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-gray-500);
  margin-right: var(--space-1);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-100);
  color: var(--color-navy);
  transition: all var(--transition-fast);
}

.share-btn:hover {
  background-color: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-white);
}

.share-btn svg {
  width: 17px;
  height: 17px;
}

/* Variante compacta usada na sidebar do artigo */
.share-bar--vertical {
  flex-direction: column;
  align-items: flex-start;
}

.share-bar--vertical .share-btn {
  width: 44px;
  height: 44px;
}


/* ==========================================================================
   26. COMMENTS (layout only — no backend logic)
   ========================================================================== */

.comments {
  border-top: 1px solid var(--color-gray-100);
  padding-top: var(--space-6);
}

.comments__title {
  margin-bottom: var(--space-4);
}

.comment-form {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
}

.comment-form__row {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-3);
}

@media (min-width: 640px) {
  .comment-form__row {
    grid-template-columns: 1fr 1fr;
  }
}

.comment-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.comment {
  display: flex;
  gap: var(--space-3);
}

.comment__avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  overflow: hidden;
  flex-shrink: 0;
}

.comment__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.comment__body {
  flex: 1;
  border-bottom: 1px solid var(--color-gray-100);
  padding-bottom: var(--space-4);
}

.comment__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: 0.25rem;
}

.comment__author {
  font-weight: 600;
  font-size: var(--fs-sm);
}

.comment__date {
  font-size: var(--fs-xs);
  color: var(--color-gray-500);
}

.comment__text {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2);
}

.comment__reply-btn {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-navy);
}

.comment__reply-btn:hover {
  color: var(--color-green-dark);
}

/* Nested reply (level 2) */
.comment--reply {
  margin-left: calc(44px + var(--space-3));
  margin-top: var(--space-4);
}


/* ==========================================================================
   27. AUDIT — Accessibility, CLS, and responsiveness fixes
   ========================================================================== */

/* Skip link: lets keyboard/screen-reader users jump straight to the content.
   Stays invisible until it receives focus (Tab), with no visual impact for mouse users. */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: 1000;
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: 0.75rem 1.25rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top var(--transition-fast);
}

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

/* Fixes CLS (Cumulative Layout Shift) on the article cover image
   by reserving its space before the image loads */
.product-card__thumb {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}

@media (max-width: 380px) {
  .product-card__thumb {
    width: 56px;
    height: 56px;
  }
}