/* ================================================================
   THAUS RETÍFICA INDUSTRIAL — Premium Design System
   ================================================================ */

/* ===== DESIGN TOKENS ===== */
:root {
  /* Type scale - Major Third (1.25) */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.563rem;
  --fs-2xl: 1.953rem;
  --fs-3xl: 2.441rem;
  --fs-4xl: 3.052rem;
  --fs-hero: clamp(3rem, 6vw, 5rem);
  --fs-hero-sub: clamp(1.1rem, 2vw, 1.35rem);

  /* Line heights */
  --lh-tight: 1.1;
  --lh-snug: 1.25;
  --lh-normal: 1.6;
  --lh-relaxed: 1.8;

  /* Letter spacing */
  --ls-tight: -0.02em;
  --ls-normal: 0;
  --ls-wide: 0.05em;
  --ls-wider: 0.1em;
  --ls-widest: 0.15em;

  /* Colors */
  --black: #0a0a0a;
  --gray-950: #111111;
  --gray-900: #171717;
  --gray-800: #1f1f1f;
  --gray-700: #2b2b2b;
  --gray-600: #3a3a3a;
  --gray-500: #555555;
  --gray-400: #777777;
  --gray-300: #999999;
  --gray-200: #cccccc;
  --gray-100: #e5e5e5;
  --gray-50: #f5f5f5;
  --white: #ffffff;

  --silver-dim: #8a8a8a;
  --silver: #c0c0c0;
  --silver-bright: #e8e8e8;

  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-muted: rgba(255, 255, 255, 0.55);

  --surface-card: rgba(255, 255, 255, 0.04);
  --surface-card-hover: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);

  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 20px;

  --gradient-silver-text: linear-gradient(135deg, #999 0%, #fff 40%, #999 60%, #fff 100%);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;

  --container-max: 1280px;
  --container-narrow: 900px;
  --container-padding: clamp(20px, 4vw, 48px);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(200, 200, 200, 0.08);

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 700ms;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: var(--black);
  line-height: var(--lh-normal);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul { list-style: none; }

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 3px;
}

/* ===== REUSABLE SECTION HEADER ===== */
.section-header {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto var(--space-4xl);
  padding: 0 var(--container-padding);
}

.section-tag {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--silver-dim);
  display: block;
  margin-bottom: var(--space-md);
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, var(--fs-3xl));
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-md);
  letter-spacing: var(--ls-tight);
}

.section-desc {
  font-size: var(--fs-md);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== GLOBAL BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--black);
  background: var(--white);
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.2) 100%);
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-out);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
}

.btn-primary:hover::before {
  transform: translateX(0);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 16px 32px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  background: transparent;
}

.btn-outline:hover {
  color: var(--white);
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.05);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  transition: background var(--duration-normal) var(--ease-out),
              backdrop-filter var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.header--scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border-subtle);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}

.nav-list {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  color: rgba(255, 255, 255, 0.6);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  transition: color var(--duration-normal);
  position: relative;
  padding-bottom: 4px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--silver);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--white);
}

.nav-cta {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--black);
  background: var(--white);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
  margin-left: 16px;
}

.nav-cta:hover {
  background: var(--silver);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.15);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all 0.3s;
  border-radius: 1px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--black);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
  filter: saturate(0.2);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 40%, rgba(0,0,0,0.6) 100%);
  z-index: 1;
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 80px 80px;
  animation: gridShift 20s linear infinite;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  padding: 120px var(--container-padding) 80px;
  gap: var(--space-3xl);
}

.hero-content {
  flex: 1;
  max-width: 640px;
}

.hero-badge {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero-badge-line {
  display: block;
  width: 32px;
  height: 1px;
  background: var(--silver);
}

.hero-badge-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--silver);
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-hero);
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--white);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.4s forwards;
}

.hero-title-accent {
  background: var(--gradient-silver-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-2xl);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.6s forwards;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.8s forwards;
}

.hero-image-showcase {
  position: relative;
  flex: 0 0 420px;
  opacity: 0;
  animation: fadeInRight 1s var(--ease-out) 0.6s forwards;
}

.hero-image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-frame img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  filter: saturate(0.3) contrast(1.1);
  transition: filter var(--duration-slow);
}

.hero-image-frame:hover img {
  filter: saturate(0.6) contrast(1.1);
}

.hero-image-border {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: none;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--silver), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ===== STATS BAR ===== */
.stats-bar {
  position: relative;
  background: var(--gray-950);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-3xl) 0;
  overflow: hidden;
}

.stats-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(192,192,192,0.3), transparent);
}

.stats-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3xl);
}

.stat-bar-item {
  text-align: center;
  flex: 1;
}

.stat-bar-counter {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  display: inline;
}

.stat-bar-suffix {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 500;
  color: var(--silver-dim);
}

.stat-bar-description {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-wider);
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

.stat-bar-divider {
  width: 1px;
  height: 50px;
  background: var(--border-subtle);
}

/* ===== SERVICES ===== */
.services-section {
  background: var(--black);
  padding: var(--space-5xl) 0 0;
}

.services-grid {
  --services-cols: 3;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  margin-bottom: var(--space-4xl);
}

.service-card {
  flex: 0 1 calc((100% - (var(--services-cols) - 1) * var(--space-lg)) / var(--services-cols));
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--silver), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(300px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.04), transparent 50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.service-card:hover {
  background: var(--surface-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card:hover::after {
  opacity: 1;
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--silver);
}

.service-icon svg {
  width: 32px;
  height: 32px;
}

.service-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.service-desc {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.service-number {
  position: absolute;
  top: 20px;
  right: 24px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  user-select: none;
}

/* Gallery Infinite Scroll */
.gallery-showcase {
  overflow: hidden;
  padding: var(--space-xl) 0;
  background: var(--gray-950);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.gallery-track {
  display: flex;
  animation: scrollGallery 35s linear infinite;
  width: max-content;
}

.gallery-item {
  flex: 0 0 350px;
  height: 250px;
  margin-right: var(--space-lg);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.2) contrast(1.05);
  transition: filter var(--duration-slow);
}

.gallery-item:hover img {
  filter: saturate(0.7) contrast(1.1);
}

.gallery-showcase:hover .gallery-track {
  animation-play-state: paused;
}

/* ===== ABOUT ===== */
.about-section {
  background: var(--black);
  padding: var(--space-5xl) 0;
}

.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.about-text .section-title {
  margin-bottom: var(--space-lg);
}

.about-text p {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.about-text p + p {
  margin-top: var(--space-md);
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  filter: saturate(0.3) contrast(1.1);
  transition: filter var(--duration-slow);
}

.about-image:hover img {
  filter: saturate(0.6) contrast(1.1);
}

/* ===== PRECISION ===== */
.precision-section {
  position: relative;
  padding: var(--space-5xl) var(--container-padding);
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.precision-bg {
  position: absolute;
  inset: -50px;
  z-index: 0;
}

.precision-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0) contrast(1.2) brightness(0.4);
}

.precision-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.85) 100%);
  z-index: 1;
}

.precision-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.precision-icon {
  color: var(--silver-dim);
  margin-bottom: var(--space-xl);
  opacity: 0.5;
}

.precision-quote {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 400;
  line-height: var(--lh-snug);
  color: var(--white);
  font-style: normal;
}

.precision-quote em {
  font-style: italic;
  background: var(--gradient-silver-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.precision-attribution {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  color: var(--text-muted);
  letter-spacing: var(--ls-wide);
  margin-top: var(--space-lg);
  text-transform: uppercase;
}

/* ===== DIFFERENTIALS ===== */
.differentials-section {
  position: relative;
  padding: var(--space-5xl) 0;
  overflow: hidden;
}

.differentials-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.differentials-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0) brightness(0.15);
}

.differentials-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,10,10,0.95) 0%, rgba(10,10,10,0.8) 50%, rgba(10,10,10,0.95) 100%);
  z-index: 1;
}

.differentials-inner {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.differentials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.diff-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.diff-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(300px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.04), transparent 50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.diff-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-glow);
}

.diff-card:hover::after {
  opacity: 1;
}

.diff-card-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--silver-dim);
  letter-spacing: var(--ls-wider);
  margin-bottom: var(--space-lg);
}

.diff-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  margin-bottom: var(--space-lg);
  color: var(--silver);
}

.diff-card-icon svg {
  width: 28px;
  height: 28px;
}

.diff-card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--white);
  margin-bottom: var(--space-md);
}

.diff-card-text {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.diff-card-line {
  position: absolute;
  bottom: 0;
  left: var(--space-2xl);
  right: var(--space-2xl);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--silver-dim), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.diff-card:hover .diff-card-line {
  opacity: 0.5;
}

/* ===== SHOWCASE CARDS ===== */
.showcase-section {
  background: var(--gray-950);
  padding: var(--space-5xl) 0;
}

.showcase-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.showcase-card {
  background: var(--gray-900);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
}

.showcase-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(192,192,192,0.3), transparent, rgba(192,192,192,0.1));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--duration-normal);
  pointer-events: none;
  z-index: 2;
}

.showcase-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.showcase-card:hover::before {
  opacity: 1;
}

.showcase-card-image {
  height: 240px;
  overflow: hidden;
  position: relative;
}

.showcase-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.3);
  transition: all var(--duration-slow) var(--ease-out);
}

.showcase-card:hover .showcase-card-image img {
  transform: scale(1.08);
  filter: saturate(0.6);
}

.showcase-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(to top, var(--gray-900), transparent);
  pointer-events: none;
}

.showcase-card-content {
  padding: var(--space-lg);
}

.showcase-card-tag {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--silver-dim);
  margin-bottom: var(--space-md);
  display: inline-block;
}

.showcase-card-content h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--white);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-sm);
}

.showcase-card-content p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

/* ===== CLIENTS ===== */
.clients-section {
  background: var(--gray-950);
  padding: var(--space-5xl) 0;
  overflow: hidden;
}

.clients-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
}

.client-card {
  position: relative;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-normal) var(--ease-out);
  overflow: hidden;
}

.client-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.client-card:hover {
  border-color: var(--border-medium);
  background: var(--surface-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.client-card:hover::before {
  opacity: 1;
}

.client-logo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  width: 100%;
}

.client-logo-wrapper img {
  max-height: 80px;
  max-width: 220px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1) opacity(0.6);
  transition: filter var(--duration-normal) var(--ease-out);
}

.client-card--lg .client-logo-wrapper img {
  max-height: 110px;
  max-width: 240px;
}

.client-card:hover .client-logo-wrapper img {
  filter: brightness(0) invert(1) opacity(1);
}

@media (max-width: 768px) {
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .client-logo-wrapper img {
    max-height: 55px;
    max-width: 140px;
  }
}

/* ===== CONTACT ===== */
.contact-section {
  background: var(--black);
  padding: var(--space-5xl) 0;
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  align-items: start;
}

.contact-info-side .section-tag {
  text-align: left;
}

.contact-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 3vw, var(--fs-3xl));
  font-weight: 700;
  color: var(--white);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-lg);
}

.contact-lead {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-detail-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--silver);
  flex-shrink: 0;
}

.contact-detail-icon svg {
  width: 20px;
  height: 20px;
}

.contact-detail-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--silver-dim);
  display: block;
  margin-bottom: 4px;
}

.contact-detail-item p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-normal);
}

.contact-detail-item a {
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

.contact-detail-item a:hover {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.social-link-explicit {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  color: var(--silver-dim);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  transition: all var(--duration-normal);
}

.social-link-explicit:hover {
  color: var(--white);
  border-color: #1877F2;
  background: rgba(24, 119, 242, 0.1);
}

.social-link-explicit svg {
  flex-shrink: 0;
}

/* Form Glass */
.contact-form-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
}

.form-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--white);
  margin-bottom: var(--space-xl);
}

.form-field {
  position: relative;
  margin-bottom: var(--space-lg);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 20px 16px 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: var(--fs-base);
  font-family: inherit;
  transition: border-color var(--duration-normal), background var(--duration-normal);
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.form-field label {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: all var(--duration-fast);
  pointer-events: none;
}

.form-field textarea ~ label {
  top: 20px;
  transform: none;
}

.form-field input:focus ~ label,
.form-field input:not(:placeholder-shown) ~ label,
.form-field textarea:focus ~ label,
.form-field textarea:not(:placeholder-shown) ~ label {
  top: 8px;
  transform: none;
  font-size: var(--fs-xs);
  color: var(--silver);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--silver);
  background: rgba(255, 255, 255, 0.06);
  outline: 2px solid var(--silver-dim);
  outline-offset: 1px;
}

.form-field-line {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--silver);
  transition: all var(--duration-normal) var(--ease-out);
  transform: translateX(-50%);
  border-radius: 1px;
}

.form-field input:focus ~ .form-field-line,
.form-field textarea:focus ~ .form-field-line {
  width: 100%;
  left: 0;
  transform: none;
}

.btn-submit-premium {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  justify-content: center;
  padding: 18px 32px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--black);
  background: var(--white);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}

.btn-submit-premium:hover {
  background: var(--silver-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.15);
}

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

.btn-submit-premium svg {
  width: 18px;
  height: 18px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--black);
  color: var(--white);
  position: relative;
  border-top: 1px solid var(--border-subtle);
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(192,192,192,0.2), transparent);
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4xl) var(--container-padding) var(--space-xl);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--border-subtle);
}

.footer-logo {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: var(--space-md);
}

.footer-tagline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  color: var(--silver-dim);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.footer-quote {
  font-size: var(--fs-sm);
  font-style: italic;
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
  max-width: 350px;
}

.footer-nav-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--silver-dim);
  margin-bottom: var(--space-lg);
}

.footer-nav ul li {
  margin-bottom: var(--space-sm);
}

.footer-nav ul li a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.footer-nav ul li a:hover {
  color: var(--white);
}

.footer-contact-col .contact-detail-item {
  margin-bottom: var(--space-md);
}

.footer-contact-col .contact-detail-item p {
  font-size: var(--fs-xs);
}

.footer-social-row {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.footer-social-row .social-link-explicit {
  padding: 8px 16px;
  font-size: var(--fs-xs);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* ===== WHATSAPP FLOAT ===== */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: transform var(--duration-normal) var(--ease-out);
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(37, 211, 102, 0.3);
  animation: whatsappPulse 2s ease-in-out infinite;
}

.whatsapp-float::after {
  content: 'Fale conosco';
  position: absolute;
  right: 72px;
  background: var(--gray-900);
  color: var(--white);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast);
  border: 1px solid var(--border-subtle);
}

.whatsapp-float:hover {
  transform: scale(1.1);
}

.whatsapp-float:hover::after {
  opacity: 1;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; height: 40px; }
  50% { opacity: 0.3; height: 20px; }
}

@keyframes gridShift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(80px, 80px); }
}

@keyframes whatsappPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0; }
}

@keyframes scrollGallery {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Reveal animations (only hidden when JS is running) */
.js .reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

.js .reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.js .reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.js .reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.js .reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .gallery-track { animation: none; }
  .gallery-showcase { overflow-x: auto; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
    padding-top: 140px;
  }

  .hero-content { max-width: 100%; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-badge { justify-content: center; }

  .hero-image-showcase {
    flex: 0 0 auto;
    width: 80%;
    max-width: 400px;
  }

  .hero-image-frame img { height: 320px; }

  .services-grid { --services-cols: 2; }
  .differentials-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-container { grid-template-columns: repeat(2, 1fr); }
  .about-container { grid-template-columns: 1fr; }
  .contact-container { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    border-bottom: 1px solid var(--border-subtle);
  }

  .nav.open {
    max-height: 350px;
    padding: 24px 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .nav-cta { display: none; }
  .menu-toggle { display: flex; }

  .hero-image-showcase { display: none; }
  .hero-title { font-size: clamp(2.2rem, 8vw, 3rem); }
  .hero-scroll-indicator { display: none; }

  .stats-container {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .stat-bar-divider {
    width: 60px;
    height: 1px;
  }

  .services-grid { --services-cols: 1; }
  .differentials-grid { grid-template-columns: 1fr; }
  .showcase-container { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }

  .gallery-item {
    flex: 0 0 280px;
    height: 200px;
  }
}

@media (max-width: 480px) {
  html { scroll-padding-top: 64px; }
  .header-container { height: 64px; }
  .nav { top: 64px; }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-outline {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .contact-form-glass {
    padding: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}