/* ============================================================
   MARLON KLEIN — marlonklein.com.br
   Design System: "Luxo Silencioso" (Silent Luxury)
   ============================================================ */

/* ── Google Fonts Import ─────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* ── Design Tokens ───────────────────────────────────────── */
:root {
  --color-bg:        #F2F1EF;
  --color-surface:   #FFFFFF;
  --color-dark:      #0F1923;
  --color-dark-mid:  #162033;
  --color-primary:   #1A2540;
  --color-accent:    #C9A96E;
  --color-accent-lt: #DFC49A;
  --color-text:      #2C2C2C;
  --color-muted:     #7A7A7A;
  --color-border:    #E0DFDB;
  --color-white:     #FFFFFF;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --size-xs:   0.75rem;
  --size-sm:   0.875rem;
  --size-base: 1rem;
  --size-lg:   1.125rem;
  --size-xl:   1.375rem;
  --size-2xl:  1.75rem;
  --size-3xl:  2.5rem;
  --size-4xl:  3.5rem;
  --size-5xl:  5rem;
  --size-6xl:  7rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl:  0 24px 60px rgba(0,0,0,0.18);

  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.2s ease;

  --max-width: 1280px;
  --section-py: 7rem;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

/* ── Typography ──────────────────────────────────────────── */
.display-name {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(3.5rem, 10vw, var(--size-6xl));
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.display-name em {
  font-style: italic;
  font-weight: 300;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
}

h2.section-title {
  font-size: clamp(2rem, 4vw, var(--size-4xl));
  font-weight: 300;
  letter-spacing: -0.01em;
}

h3 {
  font-family: var(--font-body);
  font-size: var(--size-xl);
  font-weight: 500;
}

p {
  font-size: var(--size-base);
  line-height: 1.8;
  color: var(--color-text);
}

/* ── Layout Utilities ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* ── Scroll Reveal ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Label / Eyebrow ─────────────────────────────────────── */
.eyebrow {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--color-accent);
  flex-shrink: 0;
}

.eyebrow-light {
  color: var(--color-accent-lt);
}

.eyebrow-light::before {
  background: var(--color-accent-lt);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 2.2rem;
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  border-radius: 0;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-dark);
}

.btn-primary:hover {
  background: var(--color-accent-lt);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 169, 110, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.35);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.7);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--color-dark);
  color: var(--color-accent);
  border: 1px solid transparent;
}

.btn-dark:hover {
  background: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn svg {
  width: 1rem;
  height: 1rem;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* ── Divider ─────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: 0;
}

/* ── HEADER / NAV ────────────────────────────────────────── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}

#site-header.scrolled {
  background: rgba(15, 25, 35, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1rem 0;
  box-shadow: 0 2px 30px rgba(0,0,0,0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.nav-logo-mark {
  width: 38px;
  height: 38px;
  background: var(--color-accent);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-dark);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.nav-logo-name {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 0.04em;
}

.nav-logo-sub {
  font-size: var(--size-xs);
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links a {
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--color-white);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-white);
  transition: var(--transition);
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 25, 35, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.nav-mobile.open {
  display: flex;
  opacity: 1;
  pointer-events: all;
}

.nav-mobile a {
  font-family: var(--font-display);
  font-size: var(--size-4xl);
  font-weight: 300;
  color: var(--color-white);
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}

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

/* ── HERO SECTION ────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding-bottom: 5rem;
  overflow: hidden;
  background-color: var(--color-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../img/hero-bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.55;
  transform: scale(1.04);
  transition: transform 8s ease;
}

#hero.loaded .hero-bg {
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(15, 25, 35, 0.95) 0%,
    rgba(15, 25, 35, 0.5) 50%,
    rgba(15, 25, 35, 0.3) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-content .eyebrow {
  margin-bottom: 1.5rem;
}

.hero-name {
  margin-bottom: 1.75rem;
}

.hero-headline {
  font-size: clamp(0.9rem, 1.5vw, var(--size-lg));
  font-weight: 300;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.04em;
  max-width: 560px;
  line-height: 1.6;
  margin-bottom: 2.75rem;
}

.hero-headline strong {
  color: rgba(255,255,255,0.95);
  font-weight: 500;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  right: 3rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255,255,255,0.4);
  font-size: var(--size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  z-index: 1;
}

.hero-scroll-line {
  width: 1px;
  height: 3rem;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ── SOBRE / ABOUT SECTION ───────────────────────────────── */
#sobre {
  background: var(--color-bg);
}

.sobre-text p {
  margin-bottom: 1.25rem;
  color: var(--color-muted);
}

.sobre-text p:first-of-type {
  color: var(--color-text);
  font-size: var(--size-lg);
  font-weight: 300;
  line-height: 1.75;
}

.sobre-text p strong {
  color: var(--color-primary);
  font-weight: 500;
}

.sobre-text .section-title {
  margin-bottom: 2rem;
  color: var(--color-primary);
}

.kpis-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.kpi-card {
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-accent);
}

.kpi-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.kpi-number {
  font-family: var(--font-display);
  font-size: var(--size-4xl);
  font-weight: 300;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.kpi-suffix {
  font-size: var(--size-2xl);
  color: var(--color-accent);
}

.kpi-label {
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.sobre-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.2rem;
  background: var(--color-dark);
  color: var(--color-accent);
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 2rem;
}

.sobre-badge svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

/* ── EMPREENDIMENTOS SECTION ─────────────────────────────── */
#empreendimentos {
  background: var(--color-dark);
  position: relative;
  overflow: hidden;
}

#empreendimentos::before {
  content: 'VIVERT';
  position: absolute;
  bottom: -1rem;
  right: -1rem;
  font-family: var(--font-display);
  font-size: clamp(6rem, 14vw, 14rem);
  font-weight: 300;
  color: rgba(255,255,255,0.03);
  pointer-events: none;
  letter-spacing: -0.04em;
}

#empreendimentos .section-title {
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.vivert-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
  transition: var(--transition);
}

.vivert-card:hover {
  border-color: rgba(201, 169, 110, 0.25);
}

.vivert-img-wrap {
  position: relative;
  overflow: hidden;
  height: 420px;
}

.vivert-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.vivert-card:hover .vivert-img-wrap img {
  transform: scale(1.04);
}

.vivert-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,25,35,0.85) 0%, transparent 50%);
}

.vivert-img-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  padding: 0.4rem 1rem;
  background: var(--color-accent);
  color: var(--color-dark);
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.vivert-body {
  padding: 2.5rem;
}

.vivert-title {
  font-family: var(--font-display);
  font-size: var(--size-3xl);
  font-weight: 300;
  color: var(--color-white);
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.vivert-location {
  font-size: var(--size-sm);
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.vivert-desc {
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.vivert-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.vivert-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.vivert-feature-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.vivert-feature-label {
  font-size: var(--size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 0.2rem;
}

.vivert-feature-value {
  font-size: var(--size-sm);
  color: var(--color-white);
  font-weight: 400;
}

/* ── CONTEÚDO SECTION ────────────────────────────────────── */
#conteudo {
  background: var(--color-surface);
}

#conteudo .section-title {
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.conteudo-intro {
  color: var(--color-muted);
  max-width: 560px;
  margin-bottom: 3.5rem;
}

.conteudo-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 3rem;
}

.conteudo-tab {
  padding: 0.8rem 1.75rem;
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--color-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition-fast);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font-body);
}

.conteudo-tab.active,
.conteudo-tab:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.conteudo-panel {
  display: none;
}

.conteudo-panel.active {
  display: block;
}

/* YouTube Panel */
.yt-main-card {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
  padding: 2.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.yt-main-thumb {
  width: 280px;
  height: 160px;
  background: var(--color-dark);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.yt-play-btn {
  width: 52px;
  height: 52px;
  background: var(--color-accent);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: var(--transition);
}

.yt-play-btn svg {
  width: 20px;
  height: 20px;
  color: var(--color-dark);
  margin-left: 3px;
}

.yt-main-card:hover .yt-play-btn {
  transform: scale(1.1);
  background: var(--color-accent-lt);
}

.yt-card-body h3 {
  font-family: var(--font-display);
  font-size: var(--size-2xl);
  font-weight: 400;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.yt-card-body p {
  color: var(--color-muted);
  font-size: var(--size-sm);
  margin-bottom: 1.5rem;
}

.yt-handle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--size-xs);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: var(--transition-fast);
}

.yt-handle:hover { color: var(--color-primary); }

/* Medium Articles */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.article-card {
  padding: 2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.article-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.article-card:hover::after {
  transform: scaleX(1);
}

.article-tag {
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.article-title {
  font-family: var(--font-display);
  font-size: var(--size-xl);
  font-weight: 400;
  color: var(--color-primary);
  line-height: 1.3;
}

.article-excerpt {
  font-size: var(--size-sm);
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
}

.article-read-more {
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.article-read-more svg {
  width: 0.9rem;
  height: 0.9rem;
  transition: transform var(--transition-fast);
}

.article-card:hover .article-read-more svg {
  transform: translateX(4px);
}

/* ── FOOTER ──────────────────────────────────────────────── */
#site-footer {
  background: var(--color-dark);
  padding: 4rem 0 2.5rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: start;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 2rem;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: var(--size-3xl);
  font-weight: 300;
  color: var(--color-white);
  letter-spacing: -0.01em;
  margin-bottom: 0.25rem;
}

.footer-brand-sub {
  font-size: var(--size-xs);
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.footer-desc {
  font-size: var(--size-sm);
  color: rgba(255,255,255,0.45);
  max-width: 380px;
  line-height: 1.8;
}

.footer-links-col h4 {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  margin-bottom: 1.25rem;
}

.footer-links-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-col a {
  font-size: var(--size-sm);
  color: rgba(255,255,255,0.6);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: color var(--transition-fast);
  text-decoration: none;
}

.footer-links-col a:hover {
  color: var(--color-accent);
}

.footer-links-col a svg {
  width: 1rem;
  height: 1rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: var(--size-xs);
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.04em;
}

.footer-alfasul-link {
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: opacity var(--transition-fast);
}

.footer-alfasul-link:hover { opacity: 0.75; }

/* ── BACK TO TOP ─────────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-dark);
  border: none;
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 100;
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

#back-to-top:hover {
  transform: translateY(-3px);
  background: var(--color-accent-lt);
}

#back-to-top svg {
  width: 1.1rem;
  height: 1.1rem;
}

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .vivert-features {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-py: 4.5rem;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero-scroll {
    display: none;
  }

  .kpis-grid {
    grid-template-columns: 1fr 1fr;
  }

  .yt-main-card {
    flex-direction: column;
    gap: 1.5rem;
  }

  .yt-main-thumb {
    width: 100%;
    height: 200px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .vivert-img-wrap {
    height: 260px;
  }

  .vivert-features {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1.25rem;
  }

  .kpis-grid {
    grid-template-columns: 1fr;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .conteudo-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ── GRAIN TEXTURE OVERLAY ───────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.018;
  pointer-events: none;
  z-index: 9999;
}