:root {
  --bg: #F7F3ED;
  --bg-alt: #EDE9E2;
  --teal: #0A3538;
  --teal-light: #1a4f55;
  --orange: #E8600A;
  --orange-light: #f07020;
  --text: #0A3538;
  --text-muted: #5a7578;
  --text-light: #8aa8aa;
  --surface: #FFFFFF;
  --border: rgba(10, 53, 56, 0.12);
  --radius: 12px;
  --radius-sm: 6px;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --shadow: 0 4px 32px rgba(10, 53, 56, 0.08);
  --shadow-lg: 0 16px 64px rgba(10, 53, 56, 0.12);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
}

/* ─── NAV ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 243, 237, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-wordmark {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--teal);
}

.nav-tagline {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ─── HERO ─── */
.hero {
  padding: 80px 32px 100px;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
}

.eyebrow-badge {
  display: inline-block;
  background: var(--orange);
  color: white;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
}

.eyebrow-sep, .eyebrow-text {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(42px, 5vw, 64px);
  line-height: 1.1;
  color: var(--teal);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 480px;
  margin-bottom: 40px;
}

.hero-proof {
  display: flex;
  align-items: center;
  gap: 28px;
}

.proof-stat {
  display: flex;
  flex-direction: column;
}

.proof-number {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 4px;
}

.proof-label {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
  max-width: 120px;
}

.proof-sep {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ─── WHATSAPP FRAME ─── */
.hero-visual {
  display: flex;
  justify-content: flex-end;
}

.whatsapp-frame {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.wa-header {
  background: var(--teal);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.wa-avatar {
  width: 36px;
  height: 36px;
  background: var(--orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wa-name-row {
  display: flex;
  flex-direction: column;
}

.wa-name {
  font-size: 13px;
  font-weight: 600;
  color: white;
}

.wa-online {
  font-size: 11px;
  color: #7ddb8c;
}

.wa-messages {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.wa-msg {
  display: flex;
  flex-direction: column;
}

.wa-in {
  align-items: flex-start;
}

.wa-out {
  align-items: flex-end;
}

.wa-bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 13px;
  line-height: 1.5;
}

.wa-bubble.in {
  background: var(--bg-alt);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.wa-bubble.out {
  background: var(--teal);
  color: white;
  border-bottom-right-radius: 4px;
}

.wa-time {
  font-size: 10px;
  color: var(--text-light);
  margin-top: 4px;
  padding-left: 4px;
}

.wa-status {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  padding-right: 4px;
}

.wa-input-bar {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
}

.wa-placeholder {
  font-size: 13px;
  color: var(--text-light);
  font-style: italic;
}

.wa-send {
  width: 32px;
  height: 32px;
  background: var(--orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── HOW IT WORKS ─── */
.how-it-works {
  background: var(--teal);
  padding: 80px 32px;
}

.hiw-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.hiw-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 48px;
}

.hiw-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid rgba(247, 243, 237, 0.12);
}

.hiw-step:last-child {
  border-bottom: none;
}

.step-num {
  font-family: var(--font-display);
  font-size: 48px;
  color: var(--orange);
  line-height: 1;
  opacity: 0.8;
}

.step-title {
  font-family: var(--font-display);
  font-size: 26px;
  color: #F7F3ED;
  margin-bottom: 12px;
  line-height: 1.2;
}

.step-desc {
  font-size: 15px;
  color: rgba(247, 243, 237, 0.65);
  line-height: 1.7;
  max-width: 560px;
}

.hiw-outro {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(247, 243, 237, 0.12);
}

.hiw-outro p {
  font-family: var(--font-display);
  font-size: 20px;
  font-style: italic;
  color: rgba(247, 243, 237, 0.6);
}

/* ─── SHARED SECTION STYLES ─── */
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 16px;
}

.section-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 44px);
  color: var(--teal);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* ─── DIFERENCIADORES ─── */
.diferenciadores {
  background: var(--bg);
  padding: 80px 32px;
}

.diff-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.diff-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.diff-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.diff-primary {
  background: var(--teal);
  border-color: transparent;
}

.diff-icon {
  margin-bottom: 20px;
}

.diff-title {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--teal);
  margin-bottom: 12px;
  line-height: 1.3;
}

.diff-primary .diff-title {
  color: #F7F3ED;
}

.diff-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

.diff-primary .diff-desc {
  color: rgba(247, 243, 237, 0.65);
}

.diff-wide {
  grid-column: 1 / -1;
}

/* ─── STACK ─── */
.stack {
  background: var(--bg-alt);
  padding: 80px 32px;
}

.stack-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.stack-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 20px;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stack-tag {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--teal);
  transition: background 0.2s, color 0.2s;
}

.stack-tag:hover {
  background: var(--teal);
  color: white;
  border-color: var(--teal);
}

/* ─── CLOSING ─── */
.closing {
  background: var(--teal);
  padding: 80px 32px;
}

.closing-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.closing-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 20px;
}

.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 42px);
  color: #F7F3ED;
  line-height: 1.2;
  margin-bottom: 20px;
}

.closing-sub {
  font-size: 15px;
  color: rgba(247, 243, 237, 0.65);
  line-height: 1.7;
}

.vision-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(247, 243, 237, 0.4);
  margin-bottom: 20px;
}

.vision-text {
  font-size: 16px;
  color: rgba(247, 243, 237, 0.7);
  line-height: 1.75;
  font-style: italic;
}

/* ─── FOOTER ─── */
.footer {
  background: var(--bg-alt);
  padding: 40px 32px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--teal);
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-sep {
  opacity: 0.4;
}

.footer-copy {
  font-size: 12px;
  color: var(--text-light);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .nav-inner { padding: 14px 20px; }
  .nav-tagline { display: none; }

  .hero { padding: 48px 20px 64px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { justify-content: flex-start; }
  .whatsapp-frame { max-width: 320px; }
  .hero-headline { font-size: 36px; }
  .hero-sub { font-size: 16px; }

  .how-it-works { padding: 56px 20px; }
  .hiw-step { grid-template-columns: 56px 1fr; gap: 20px; padding: 28px 0; }
  .step-num { font-size: 36px; }
  .step-title { font-size: 20px; }

  .diferenciadores { padding: 56px 20px; }
  .diff-grid { grid-template-columns: 1fr; }
  .diff-wide { grid-column: 1; }

  .stack { padding: 56px 20px; }
  .stack-inner { grid-template-columns: 1fr; gap: 40px; }

  .closing { padding: 56px 20px; }
  .closing-inner { grid-template-columns: 1fr; gap: 48px; }

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

/* ─── MOBILE 375 ─── */
@media (max-width: 480px) {
  .hero-proof { flex-direction: column; align-items: flex-start; gap: 16px; }
  .proof-sep { display: none; }
  .whatsapp-frame { max-width: 100%; }
}