/* ===== ATLAS AI NEXUS — Design System v2 "Tech-Luxury" ===== */

@import url('https://fonts.googleapis.com/css2?family=Exo+2:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,600;1,700;1,800&display=swap');

/* --- Tokens --- */
:root {
  /* Purple core */
  --purple-deep: #1A0A2E;
  --purple-dark: #26103E;
  --purple-mid: #3B1260;
  --purple-brand: #5B21B6;
  --purple-light: #7C3AED;
  --purple-glow: #A855F7;

  /* Gold accent */
  --gold: #D4A53C;
  --gold-light: #E8C46A;
  --gold-dim: #B8922F;

  /* Neutrals */
  --white: #FFFFFF;
  --white-lilac: #FDFBFE;
  --gray-50: #F8F6FA;
  --gray-100: #F0ECF4;
  --gray-200: #E2DCE8;
  --gray-400: #9E92AB;
  --gray-600: #6B5F7B;
  --text-dark: #1E1033;
  --text-body: #3D2F52;
  --text-muted: #7A6B8A;

  /* Functional */
  --green-whatsapp: #25D366;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #1A0A2E 0%, #2D1150 40%, #1A0A2E 100%);
  --gradient-section-dark: linear-gradient(180deg, #1A0A2E 0%, #26103E 100%);
  --gradient-cta: linear-gradient(135deg, #3B1260 0%, #5B21B6 100%);
  --gradient-btn: linear-gradient(135deg, #5B21B6 0%, #7C3AED 100%);
  --gradient-gold: linear-gradient(135deg, #D4A53C 0%, #E8C46A 100%);

  /* Shadows */
  --shadow-card: 0 2px 16px rgba(26, 10, 46, 0.06);
  --shadow-card-hover: 0 8px 32px rgba(26, 10, 46, 0.12);
  --shadow-btn: 0 4px 16px rgba(91, 33, 182, 0.3);
  --shadow-dark-card: 0 2px 20px rgba(0, 0, 0, 0.25);

  /* Radii */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;

  /* Typography */
  --font: 'Exo 2', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --container: 1200px;
  --nav-height: 80px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 0.2s var(--ease);
  --t-base: 0.35s var(--ease);
  --t-slow: 0.6s var(--ease);
}

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

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

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

a { text-decoration: none; color: inherit; transition: color var(--t-fast); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; font-family: var(--font); }

/* --- Utilities --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Sections */
.section { padding: 100px 0; position: relative; }
.section--dark {
  background: var(--gradient-section-dark);
  color: var(--white);
}
.section--light {
  background: var(--white-lilac);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}

.section-label--light {
  background: rgba(91, 33, 182, 0.08);
  color: var(--purple-brand);
  border: 1px solid rgba(91, 33, 182, 0.12);
}

.section-label--dark {
  background: rgba(212, 165, 60, 0.12);
  color: var(--gold);
  border: 1px solid rgba(212, 165, 60, 0.2);
}

.section-title {
  font-size: clamp(1.9rem, 3.8vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-title em {
  font-style: italic;
  font-weight: 800;
}

.section--dark .section-title em {
  color: var(--gold-light);
}

.section--light .section-title em,
.section-title em {
  color: var(--purple-brand);
}

.section-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 600px;
}

.section--dark .section-subtitle { color: var(--gray-400); }
.section--light .section-subtitle,
.section-subtitle { color: var(--text-muted); }

.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 34px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: all var(--t-base);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--gradient-btn);
  color: var(--white);
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(91, 33, 182, 0.45);
}

.btn-outline {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.25);
  color: var(--white);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.btn-outline-purple {
  background: transparent;
  border: 2px solid var(--purple-brand);
  color: var(--purple-brand);
}
.btn-outline-purple:hover {
  background: var(--purple-brand);
  color: var(--white);
  transform: translateY(-2px);
}

/* --- Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }
.reveal-d4 { transition-delay: 0.4s; }
.reveal-d5 { transition-delay: 0.5s; }

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: all var(--t-base);
}

.nav.scrolled {
  background: rgba(26, 10, 46, 0.92);
  backdrop-filter: blur(20px) saturate(1.3);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
}

.nav-logo svg { flex-shrink: 0; }

.nav-logo .logo-bold { font-weight: 800; }
.nav-logo .logo-thin { font-weight: 300; opacity: 0.85; }

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

.nav-center a {
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--t-fast);
}
.nav-center a:hover { color: var(--white); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-social {
  display: flex;
  gap: 8px;
}

.nav-social a {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--t-fast);
}
.nav-social a:hover { color: var(--white); background: rgba(255,255,255,0.1); }

.nav-cta {
  padding: 10px 24px;
  font-size: 0.82rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  border-radius: var(--radius-pill);
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all var(--t-fast);
  background: transparent;
}
.nav-cta:hover {
  background: var(--white);
  color: var(--purple-mid);
  border-color: var(--white);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 4px;
}
.nav-mobile span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--t-fast);
}

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

/* Wave grid SVG texture */
.hero-texture {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80'%3E%3Cpath d='M0 0h80v80H0z' fill='none'/%3E%3Cpath d='M0 40h80M40 0v80' stroke='%237C3AED' stroke-width='0.5' opacity='0.5'/%3E%3Ccircle cx='40' cy='40' r='1' fill='%237C3AED' opacity='0.3'/%3E%3C/svg%3E");
  background-size: 80px 80px;
}

/* Ambient glow */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}
.hero-glow--1 {
  width: 500px; height: 500px;
  background: var(--purple-light);
  opacity: 0.12;
  top: 5%; right: 15%;
}
.hero-glow--2 {
  width: 400px; height: 400px;
  background: var(--gold);
  opacity: 0.06;
  bottom: 10%; left: 5%;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 24px;
}

.hero-title em {
  font-style: italic;
  font-weight: 800;
  color: var(--gold-light);
}

.hero-description {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-description::before {
  content: '';
  flex-shrink: 0;
  width: 48px;
  height: 2px;
  background: var(--gold);
  margin-top: 12px;
}

.hero-description p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-clients {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-clients span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
}

.hero-clients-dots {
  display: flex;
  gap: 4px;
}

.hero-clients-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0.6;
}

/* Hexagonal image mask */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-hex-wrapper {
  position: relative;
  width: 480px;
  height: 520px;
}

.hero-hex-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  clip-path: polygon(50% 0%, 95% 25%, 95% 75%, 50% 100%, 5% 75%, 5% 25%);
}

.hero-hex-border {
  position: absolute;
  inset: -6px;
  clip-path: polygon(50% 0%, 95% 25%, 95% 75%, 50% 100%, 5% 75%, 5% 25%);
  background: linear-gradient(135deg, var(--purple-light) 0%, var(--gold) 100%);
  z-index: -1;
  opacity: 0.5;
}

/* ===== ABOUT / PROCESS SECTION (white) ===== */
.about-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.process-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: all var(--t-base);
  border: 1px solid var(--gray-100);
}
.process-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.process-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: var(--radius-md);
  background: rgba(91, 33, 182, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--purple-brand);
}

.process-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.process-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== SERVICES (dark & interactive) ===== */
.services-interactive {
  display: flex;
  gap: 0;
  margin-top: 60px;
  background: var(--purple-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 520px;
  box-shadow: 0 10px 40px rgba(10, 5, 20, 0.5);
}

/* Sidebar Tabs */
.services-sidebar {
  flex: 0 0 320px;
  background: rgba(10, 5, 20, 0.6);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
}

.service-tab {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-left: 3px solid transparent;
  padding: 30px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--t-base);
  color: var(--gray-400);
}

.service-tab:hover {
  background: rgba(255, 255, 255, 0.02);
  color: var(--white);
}

.service-tab.active {
  background: rgba(124, 58, 237, 0.15);
  border-left-color: var(--gold);
  color: var(--white);
}

.tab-icon {
  font-size: 1.4rem;
  background: rgba(255, 255, 255, 0.05);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--t-base);
}

.service-tab.active .tab-icon {
  background: var(--purple-brand);
  color: var(--white);
  box-shadow: 0 0 15px rgba(124, 58, 237, 0.5);
}

.tab-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* Content Area */
.services-content-wrapper {
  flex: 1;
  position: relative;
  background: rgba(20, 10, 40, 0.2);
}

.service-panel {
  position: absolute;
  inset: 0;
  display: flex;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
  transform: translateY(15px);
}

.service-panel.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.panel-info {
  flex: 1;
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.panel-info h3 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.panel-info p {
  font-size: 1rem;
  color: var(--gray-300);
  line-height: 1.65;
  margin-bottom: 24px;
}

.panel-results {
  list-style: none;
  padding: 0;
  margin: 0 0 32px 0;
}

.panel-results li {
  position: relative;
  padding-left: 24px;
  font-size: 0.95rem;
  color: var(--gray-300);
  line-height: 1.6;
  margin-bottom: 12px;
  font-weight: 400;
}

.panel-results li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.9rem;
}

.panel-info .btn {
  align-self: flex-start;
  padding: 12px 28px;
}

.panel-visual {
  flex: 0 0 45%;
  position: relative;
  overflow: hidden;
}

.panel-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  clip-path: polygon(10% 0, 100% 0, 100% 100%, 0 100%);
  transition: transform 6s ease;
}

.service-panel.active .panel-visual img {
  transform: scale(1.05);
}

/* ===== DIFFERENTIALS (white) ===== */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.diff-card {
  text-align: center;
  padding: 36px 16px;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: all var(--t-base);
}
.diff-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(91, 33, 182, 0.15);
}

.diff-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(91, 33, 182, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.diff-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.diff-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== CASES (NexIA Lab style — light bg, alternating rows) ===== */
.section--cases {
  padding: 100px 0;
  background: var(--gray-50);
  position: relative;
}

.case-row {
  display: flex;
  gap: 0;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: 0 2px 24px rgba(26, 10, 46, 0.06);
  overflow: hidden;
  margin-bottom: 36px;
  transition: all var(--t-base);
  border: 1px solid var(--gray-100);
}
.case-row:hover {
  box-shadow: 0 8px 40px rgba(26, 10, 46, 0.1);
}
.case-row:last-of-type {
  margin-bottom: 0;
}

.case-row-image {
  flex: 0 0 420px;
  min-height: 400px;
  overflow: hidden;
}
.case-row-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.case-row:hover .case-row-image img {
  transform: scale(1.04);
}

.case-row--reversed {
  flex-direction: row-reverse;
}

.case-row-content {
  flex: 1;
  padding: 40px 44px;
}

.case-row-content h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.3;
}

.case-stars {
  font-size: 1.1rem;
  color: var(--gold);
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.case-block {
  margin-bottom: 16px;
}

.case-block-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--purple-brand);
}

.case-block p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.65;
  margin-top: 2px;
}
.case-block p strong {
  color: var(--text-dark);
  font-weight: 700;
}

.case-results-list {
  list-style: none;
  padding: 0;
  margin: 4px 0 0;
}
.case-results-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.75;
}
.case-results-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--purple-brand);
  font-weight: 700;
  font-size: 0.85rem;
}
.case-results-list li strong {
  color: var(--purple-brand);
  font-weight: 800;
}

/* ===== HOW IT WORKS (white) ===== */
.timeline {
  display: flex;
  gap: 0;
  margin-top: 48px;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 48px;
  right: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--purple-brand) 0%, var(--gold) 100%);
  border-radius: 2px;
  opacity: 0.2;
}

.timeline-step {
  flex: 1;
  text-align: center;
  padding: 0 12px;
  position: relative;
}

.timeline-num {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--purple-brand);
  position: relative;
  z-index: 2;
  transition: all var(--t-base);
}

.timeline-step:hover .timeline-num {
  border-color: var(--purple-brand);
  box-shadow: 0 0 0 4px rgba(91, 33, 182, 0.1);
}

.timeline-step h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.timeline-step p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ===== TECHNOLOGIES (dark, subtle) ===== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.tech-card {
  text-align: center;
  padding: 28px 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  transition: all var(--t-base);
}
.tech-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(124,58,237,0.2);
  transform: translateY(-3px);
}

.tech-card-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: block;
}
.tech-card h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--white);
}
.tech-card p {
  font-size: 0.76rem;
  color: var(--gray-400);
  line-height: 1.45;
}

/* ===== CTA FINAL (gradient purple) ===== */
.cta-final {
  background: var(--gradient-cta);
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 100px 0;
  color: var(--white);
}

.cta-final::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212, 165, 60, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-final .section-title {
  max-width: 650px;
  margin: 0 auto 16px;
}

.cta-final .section-subtitle {
  margin: 0 auto 36px;
  text-align: center;
  color: rgba(255,255,255,0.6);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--purple-deep);
  color: var(--white);
  padding: 60px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--gray-400);
  font-size: 0.88rem;
  margin-top: 14px;
  line-height: 1.6;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--gray-400);
  transition: all var(--t-fast);
}
.footer-social a:hover {
  background: rgba(212,165,60,0.15);
  border-color: var(--gold);
  color: var(--gold-light);
}

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 18px;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--gray-400);
  padding: 5px 0;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--gold-light); }

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--gray-600);
}

/* ===== WHATSAPP FLOATING ===== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--green-whatsapp);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 900;
  transition: all var(--t-fast);
}
.whatsapp-float:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.55);
}
.whatsapp-float svg { width: 28px; height: 28px; fill: var(--white); }

/* ===== MOBILE MENU ===== */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(26, 10, 46, 0.97);
  backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}
.mobile-menu.active { opacity: 1; pointer-events: all; }
.mobile-menu a {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--white);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-content { max-width: 100%; margin: 0 auto; }
  .hero-description { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-clients { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .hero-hex-wrapper { width: 340px; height: 370px; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .diff-grid { grid-template-columns: repeat(3, 1fr); }
  .tech-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  .nav-center, .nav-social { display: none; }
  .nav-mobile { display: flex; }
  .mobile-menu { display: flex; }

  .hero-title { font-size: clamp(1.8rem, 7vw, 2.4rem); }
  .hero-hex-wrapper { width: 280px; height: 300px; }
  .hero-actions { flex-direction: column; align-items: center; }

  .process-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr 1fr; }
  
  .case-row, .case-row--reversed {
    flex-direction: column;
  }
  .case-row-image {
    min-height: 260px;
    flex: auto;
  }
  .case-row-content {
    padding: 32px 24px;
  }

  .timeline {
    flex-direction: column;
    gap: 24px;
  }
  .timeline::before {
    top: 0; bottom: 0; left: 36px; right: auto;
    width: 3px; height: auto;
  }
  .timeline-step {
    text-align: left;
    padding-left: 96px;
  }
  .timeline-num {
    position: absolute;
    left: 0; top: 0;
    margin: 0;
  }

  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  /* Interactive Services Mobile */
  .services-interactive {
    flex-direction: column;
    min-height: auto;
  }
  .services-sidebar {
    flex: none;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .service-tab {
    padding: 20px 24px;
    border-left: none;
    border-bottom: 3px solid transparent;
  }
  .service-tab.active {
    border-left: none;
    border-bottom-color: var(--gold);
  }
  .services-content-wrapper {
    min-height: 550px; /* enough space for content + image */
  }
  .panel-info {
    padding: 32px 24px;
  }
  .panel-visual {
    height: 240px;
    flex: none;
  }
  .panel-visual img {
    clip-path: none;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .diff-grid { grid-template-columns: 1fr; }
}