/* ========================================
   ESN BRAND BOOK — SWISS PRECISION V2
   ======================================== */

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

:root {
  --esn-black: #0A0A0A;
  --esn-white: #FAFAFA;
  --esn-gray-100: #F5F5F5;
  --esn-gray-300: #E0E0E0;
  --esn-gray-500: #9E9E9E;
  --esn-gray-700: #424242;
  --esn-accent: #C9A961;

  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --container: 1200px;
  --gutter: 24px;
  --margin: 64px; /* Aumentado de 48px */
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  color: var(--esn-black);
  background-color: var(--esn-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---------- TYPOGRAPHY ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(3rem, 7vw, 5.5rem); } /* Aumentado */
h2 { font-size: clamp(2.5rem, 5vw, 4rem); } /* Aumentado */
h3 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h4 { font-size: 1.5rem; }

p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--esn-gray-700);
}

.lead {
  font-size: 1.5rem;
  line-height: 1.5;
  color: var(--esn-black);
}

.label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--esn-gray-500);
}

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

@media (max-width: 768px) {
  .container { padding: 0 24px; }
}

section {
  padding: 160px 0; /* Aumentado de 120px */
}

@media (max-width: 768px) {
  section { padding: 100px 0; }
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 96px; /* Aumentado */
  align-items: center;
}

@media (max-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 64px;
  }
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- HEADER ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--esn-gray-300);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px; /* Aumentado */
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border: 2px solid var(--esn-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-main {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--esn-black);
}

.logo-sub {
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--esn-gray-500);
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--esn-black);
  transition: color 0.2s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--esn-accent);
  transition: width 0.3s ease;
}

.nav-links a:hover { color: var(--esn-accent); }
.nav-links a:hover::after { width: 100%; }

.lang-toggle {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--esn-gray-500);
  cursor: pointer;
  padding: 8px 16px;
  border: 1px solid var(--esn-gray-300);
  transition: all 0.2s ease;
}

.lang-toggle:hover {
  color: var(--esn-black);
  border-color: var(--esn-black);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}

.mobile-toggle span {
  width: 24px;
  height: 1px;
  background: var(--esn-black);
  transition: all 0.3s ease;
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .mobile-toggle { display: flex; }

  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--esn-white);
    padding: 32px var(--margin);
    border-bottom: 1px solid var(--esn-gray-300);
    gap: 24px;
  }
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  background: var(--esn-black);
  color: var(--esn-white);
  display: flex;
  align-items: center;
  padding-top: 80px;
}

.hero-content {
  max-width: 1000px;
}

.hero h1 {
  margin-bottom: 40px;
  color: var(--esn-white);
  font-size: clamp(3.5rem, 8vw, 6rem);
}

.hero-subtitle {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--esn-gray-500);
  margin-bottom: 56px;
  max-width: 700px;
  line-height: 1.4;
}

.hero-ctas {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-block;
  padding: 18px 36px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: transparent;
  color: var(--esn-white);
  border-color: var(--esn-white);
}

.btn-primary:hover {
  background: var(--esn-white);
  color: var(--esn-black);
}

.btn-dark {
  background: var(--esn-black);
  color: var(--esn-white);
}

.btn-dark:hover {
  background: var(--esn-accent);
  color: var(--esn-black);
}

.btn-ghost {
  background: transparent;
  color: var(--esn-black);
  border-color: var(--esn-black);
}

.btn-ghost:hover {
  background: var(--esn-black);
  color: var(--esn-white);
}

.btn-link {
  padding: 0;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--esn-black);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

.btn-link::after {
  content: '→';
  transition: transform 0.2s ease;
}

.btn-link:hover::after {
  transform: translateX(6px);
}

/* ---------- SECTION: TRUSTED ---------- */
.section-trusted {
  background: var(--esn-gray-100);
  padding: 80px 0;
}

.trusted-label {
  text-align: center;
  margin-bottom: 48px;
}

.trusted-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 64px;
  flex-wrap: wrap;
}

.trusted-item {
  font-size: 1rem;
  font-weight: 500;
  color: var(--esn-gray-700);
  padding: 16px 24px;
  border: 1px solid var(--esn-gray-300);
  transition: all 0.3s ease;
}

.trusted-item:hover {
  border-color: var(--esn-accent);
  color: var(--esn-black);
}

/* ---------- SECTION: PROBLEM ---------- */
.section-problem {
  background: var(--esn-white);
}

.problem-intro {
  max-width: 800px;
  margin-bottom: 80px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

@media (max-width: 900px) {
  .problem-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .problem-grid { grid-template-columns: 1fr; }
}

.problem-card {
  padding: 40px 32px;
  border: 1px solid var(--esn-gray-300);
  transition: all 0.3s ease;
}

.problem-card:hover {
  border-color: var(--esn-accent);
  transform: translateY(-4px);
}

.problem-card h4 {
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.problem-card p {
  font-size: 0.9375rem;
}

/* ---------- SECTION: VALUE ---------- */
.section-value {
  background: var(--esn-gray-100);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
  margin-top: 80px;
}

@media (max-width: 900px) {
  .value-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .value-grid { grid-template-columns: 1fr; }
}

.value-item {
  padding-top: 32px;
  border-top: 2px solid var(--esn-accent);
}

.value-item h4 {
  margin-bottom: 16px;
}

.value-item p {
  font-size: 1rem;
}

/* ---------- SECTION: EXPERIENCE ---------- */
.section-experience {
  background: var(--esn-black);
  color: var(--esn-white);
}

.section-experience h2 {
  color: var(--esn-white);
  margin-bottom: 80px;
}

.timeline {
  max-width: 600px;
  margin: 0 auto;
}

.timeline-item {
  padding: 32px 0;
  border-bottom: 1px solid var(--esn-gray-700);
  display: flex;
  align-items: center;
  gap: 24px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--esn-accent);
  min-width: 60px;
}

.timeline-text {
  font-size: 1.25rem;
  color: var(--esn-white);
}

/* ---------- SECTION: WHO ---------- */
.section-who {
  background: var(--esn-white);
}

.who-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 80px;
}

@media (max-width: 700px) {
  .who-grid { grid-template-columns: 1fr; }
}

.who-item {
  padding: 40px 32px;
  background: var(--esn-gray-100);
  transition: all 0.3s ease;
}

.who-item:hover {
  background: var(--esn-black);
  color: var(--esn-white);
}

.who-item:hover p {
  color: var(--esn-gray-500);
}

.who-item h4 {
  margin-bottom: 12px;
}

.who-item p {
  font-size: 0.9375rem;
}

/* ---------- SECTION: INSIGHTS ---------- */
.section-insights {
  background: var(--esn-gray-100);
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 80px;
}

@media (max-width: 900px) {
  .insights-grid { grid-template-columns: 1fr; }
}

.insight-card {
  background: var(--esn-white);
  padding: 48px 32px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.insight-card:hover {
  border-color: var(--esn-accent);
  transform: translateY(-4px);
}

.insight-meta {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--esn-gray-500);
  margin-bottom: 20px;
}

.insight-card h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  line-height: 1.3;
}

.insight-card p {
  font-size: 1rem;
  margin-bottom: 24px;
}

/* ---------- SECTION: CTA ---------- */
.section-cta {
  background: var(--esn-white);
  text-align: center;
}

.section-cta h2 {
  max-width: 900px;
  margin: 0 auto 56px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.cta-direct {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-top: 64px;
  padding-top: 64px;
  border-top: 1px solid var(--esn-gray-300);
}

.cta-direct-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.cta-direct-item .label {
  margin-bottom: 4px;
}

.cta-direct-item a {
  font-size: 1rem;
  color: var(--esn-black);
  transition: color 0.2s ease;
}

.cta-direct-item a:hover {
  color: var(--esn-accent);
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--esn-black);
  color: var(--esn-gray-500);
  padding: 80px 0 32px;
  border-top: 1px solid var(--esn-gray-700);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 64px;
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 48px; }
}

@media (max-width: 500px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand .logo-main { color: var(--esn-white); }
.footer-brand .logo-sub { color: var(--esn-gray-500); }
.footer-brand p {
  margin-top: 16px;
  font-size: 0.9375rem;
  color: var(--esn-gray-500);
}

.footer-col h5 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--esn-white);
  margin-bottom: 20px;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; }
.footer-col a {
  font-size: 0.9375rem;
  color: var(--esn-gray-500);
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--esn-accent); }

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--esn-gray-700);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8125rem;
}

/* ---------- UTILITIES ---------- */
.text-center { text-align: center; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }

/* ---------- ANIMATIONS ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}