/* ============================================================
   Nexchange Landing Page — Styles
   Design System: Nexchange (dark, #23A745 green, Helvetica + Poppins)
   ============================================================ */

/* ─── Google Fonts are loaded in HTML ─────────────────────── */

:root {
  --green:         #23A745;
  --green-hover:   #2dc855;
  --green-press:   #1a8a38;
  --deep-green:    #072E1D;
  --black:         #000000;
  --neon:          #00FFAD;
  --surface-0:     #000000;
  --surface-1:     #071A10;
  --surface-2:     #0A2016;
  --border:        rgba(255,255,255,0.08);
  --border-green:  #1A4029;
  --text-primary:  #FFFFFF;
  --text-secondary:rgba(255,255,255,0.60);
  --text-tertiary: rgba(255,255,255,0.35);
  --text-green:    #23A745;
  --text-neon:     #00FFAD;
  --font-heading:  'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-body:     'Poppins', 'Helvetica Neue', sans-serif;
  --font-mono:     'SF Mono', 'Fira Code', Consolas, monospace;
  --radius-sm:     4px;
  --radius-md:     6px;
  --radius-lg:     8px;
  --radius-xl:     12px;
  --radius-pill:   9999px;
  --shadow-card:   0 2px 8px rgba(0,0,0,0.5);
  --shadow-mid:    0 4px 16px rgba(0,0,0,0.5);
  --shadow-high:   0 8px 32px rgba(0,0,0,0.6), 0 0 0 1px rgba(35,167,69,0.18);
  --shadow-green:  0 0 24px rgba(35,167,69,0.35);
  --ease:          cubic-bezier(0.4,0,0.2,1);
  --nav-height:    72px;
  --container:     1200px;
  --gutter:        40px;
}

/* ─── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--black);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
strong { font-weight: 600; color: var(--text-primary); }

/* ─── Layout ────────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section       { padding: 96px 0; }
.section-sm    { padding: 64px 0; }

/* ─── Typography ─────────────────────────────────────────────── */
.display {
  font-family: var(--font-heading);
  font-size: clamp(38px, 4.5vw, 58px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}
.section-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 10px;
}
.section-intro {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 580px;
  margin-top: 14px;
}
.section-header        { margin-bottom: 52px; }
.section-header.center { text-align: center; }
.section-header.center .section-intro { margin: 14px auto 0; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  transition: all 200ms var(--ease);
  white-space: nowrap;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: none;
}
.btn-primary  { background: var(--green); color: #fff; }
.btn-primary:hover  { background: var(--green-hover); transform: translateY(-1px); box-shadow: var(--shadow-green); }
.btn-primary:active { transform: scale(0.97); background: var(--green-press); }
.btn-ghost    { background: rgba(255,255,255,0.06); color: #fff; border: 1.5px solid rgba(255,255,255,0.13); }
.btn-ghost:hover    { background: rgba(255,255,255,0.10); }
.btn-lg       { padding: 14px 32px; font-size: 16px; }
.btn-sm       { padding: 8px 16px; font-size: 13px; }

/* ─── Badge ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.badge-green {
  background: rgba(35,167,69,0.12);
  border: 1px solid rgba(35,167,69,0.25);
  color: var(--green);
}

/* ─── Pulse dot ──────────────────────────────────────────────── */
.dot-green {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px rgba(35,167,69,0.7);
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px rgba(35,167,69,0.7); }
  50%       { opacity: 0.55; box-shadow: 0 0 2px rgba(35,167,69,0.3); }
}

/* ======================================================
   01 — NAVBAR
   ====================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  z-index: 1000;
}
.nav-logo img { height: 28px; display: block; }

/* ======================================================
   02 — HERO
   ====================================================== */
.hero {
  padding-top: calc(var(--nav-height) + 88px);
  padding-bottom: 100px;
  background: radial-gradient(ellipse 70% 80% at 10% 5%, #072E1D 0%, #000 55%, #071a10 100%);
  position: relative;
  overflow: hidden;
}
.hero-bg-x {
  position: absolute;
  right: -60px;
  top: -40px;
  width: 560px;
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
}
.hero-inner {
  display: flex;
  align-items: center;
  gap: 64px;
}
.hero-content { flex: 1; min-width: 0; }
.hero-eyebrow { margin-bottom: 28px; }
.hero-headline { margin-bottom: 22px; }
.hero-headline .accent { color: var(--green); }
.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 36px;
}
.hero-ctas { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* Hero USDT Card */
.hero-card {
  width: 340px;
  flex-shrink: 0;
  background: var(--surface-1);
  border: 1px solid rgba(35,167,69,0.22);
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow-high);
}
.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.hero-card-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.hero-card-divider {
  height: 1px;
  background: rgba(255,255,255,0.07);
  margin: 16px 0;
}
.hero-card-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 12px;
}
.hero-card-row .lbl {
  font-size: 12px;
  color: var(--text-tertiary);
  white-space: nowrap;
}
.hero-card-row .val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  text-align: right;
}
.hero-card-row .val-neon {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--neon);
  letter-spacing: 0.02em;
  text-align: right;
}
.hero-card-row .val-sm {
  font-size: 13px;
  color: var(--text-primary);
  text-align: right;
}
.hero-card-status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 18px;
  padding: 10px 14px;
  background: rgba(35,167,69,0.08);
  border: 1px solid rgba(35,167,69,0.18);
  border-radius: var(--radius-md);
}
.hero-card-status .status-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--green);
}

/* ======================================================
   03 — TRUST BAND
   ====================================================== */
.trust-band {
  background: var(--surface-1);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 40px 0;
}
.trust-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 14px;
}
.trust-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(35,167,69,0.10);
  border: 1px solid rgba(35,167,69,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--green);
}
.trust-value {
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.trust-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}
.trust-sep {
  width: 1px;
  height: 44px;
  background: rgba(255,255,255,0.07);
}

/* ======================================================
   04 — QUÉ HACEMOS
   ====================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.service-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), box-shadow 200ms var(--ease);
}
.service-card:hover {
  border-color: rgba(35,167,69,0.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(35,167,69,0.10);
  border: 1px solid rgba(35,167,69,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  margin-bottom: 20px;
}
.service-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.service-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ======================================================
   05 — CÓMO FUNCIONA
   ====================================================== */
.how-section {
  background: radial-gradient(ellipse 70% 80% at 90% 90%, #072E1D 0%, #000 60%);
}
.stepper {
  display: flex;
  position: relative;
  margin: 0 0 52px;
}
/* Horizontal connecting line — behind all steps */
.stepper::before {
  content: '';
  position: absolute;
  top: 19px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: var(--border-green);
}
.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 8px;
}
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface-1);
  border: 1.5px solid var(--border-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
  position: relative;
  z-index: 1;
  margin-bottom: 18px;
  flex-shrink: 0;
  transition: border-color 200ms, box-shadow 200ms;
}
.step:hover .step-num {
  border-color: var(--green);
  box-shadow: 0 0 16px rgba(35,167,69,0.3);
}
.step-icon-wrap {
  color: var(--text-secondary);
  margin-bottom: 10px;
}
.step-title {
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-bottom: 7px;
  letter-spacing: 0.01em;
}
.step-body {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.how-cta { text-align: center; }

/* ======================================================
   06 — PARA QUIÉN ES
   ====================================================== */
.audience-section { background: var(--surface-1); }
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.audience-card {
  background: rgba(255,255,255,0.025);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}
.audience-card:hover {
  border-color: rgba(35,167,69,0.25);
  transform: translateY(-2px);
}
.audience-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(35,167,69,0.10);
  border: 1px solid rgba(35,167,69,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  margin-bottom: 20px;
}
.audience-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.audience-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ======================================================
   07 — POR QUÉ NEXCHANGE
   ====================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 40px;
}
.benefit-item { display: flex; gap: 16px; }
.benefit-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(35,167,69,0.10);
  border: 1px solid rgba(35,167,69,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  flex-shrink: 0;
  margin-top: 2px;
}
.benefit-title {
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-bottom: 7px;
  letter-spacing: -0.005em;
}
.benefit-body {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ======================================================
   08 — SEGURIDAD Y CUMPLIMIENTO
   ====================================================== */
.security-section { background: var(--surface-1); }
.security-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}
.security-text .section-title { margin-bottom: 20px; }
.security-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}
.security-text p + p { margin-top: 14px; }
.compliance-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.compliance-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  transition: border-color 200ms var(--ease);
}
.compliance-item:hover { border-color: rgba(35,167,69,0.22); }
.compliance-item-icon {
  color: var(--green);
  flex-shrink: 0;
  margin-top: 1px;
}
.ci-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}
.ci-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ======================================================
   09 — QUÉ ES USDT
   ====================================================== */
.usdt-section {
  background: radial-gradient(ellipse 70% 80% at 90% 10%, #072E1D 0%, #000 60%);
}
.usdt-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 72px;
  align-items: start;
}
.usdt-text .section-title { margin-bottom: 20px; }
.usdt-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}
.usdt-uses-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  margin: 24px 0 12px;
}
.usdt-uses {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}
.usdt-use-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}
.usdt-use-item::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  margin-top: 7px;
}
/* USDT Info Card */
.usdt-info-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}
.usdt-info-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.005em;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.usdt-fact {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.usdt-fact-icon { color: var(--green); flex-shrink: 0; margin-top: 2px; }
.usdt-disclaimer {
  margin-top: 18px;
  padding: 12px 14px;
  background: rgba(245,158,11,0.06);
  border: 1px solid rgba(245,158,11,0.14);
  border-radius: var(--radius-md);
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  line-height: 1.65;
}

/* ======================================================
   10 — FAQs
   ====================================================== */
.faqs-section { background: var(--black); }
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.07); }
.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 200ms var(--ease);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
}
.faq-trigger:hover { color: var(--green); }
.faq-trigger.is-open { color: var(--green); }
.faq-chevron {
  flex-shrink: 0;
  transition: transform 300ms var(--ease);
  color: var(--text-secondary);
}
.faq-trigger.is-open .faq-chevron { transform: rotate(180deg); color: var(--green); }
.faq-content {
  overflow: hidden;
  max-height: 0;
  transition: max-height 320ms var(--ease);
}
.faq-content.is-open { max-height: 400px; }
.faq-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-bottom: 20px;
}

/* ======================================================
   11 — CTA FINAL
   ====================================================== */
.cta-section {
  background: radial-gradient(ellipse 80% 100% at 50% 50%, #072E1D 0%, #000 65%);
  text-align: center;
}
.cta-inner { max-width: 640px; margin: 0 auto; }
.cta-headline {
  font-family: var(--font-heading);
  font-size: clamp(26px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.cta-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 40px;
}
.cta-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.cta-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255,255,255,0.25);
  transition: color 200ms, text-decoration-color 200ms;
}
.cta-link:hover { color: var(--text-primary); text-decoration-color: rgba(255,255,255,0.6); }

/* ======================================================
   12 — FOOTER
   ====================================================== */
.footer {
  background: var(--black);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 60px 0 36px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  margin-bottom: 32px;
}
.footer-logo { height: 26px; margin-bottom: 14px; }
.footer-tagline {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  transition: color 200ms;
}
.footer-contact-item:hover { color: var(--text-primary); }
.footer-nav-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}
.footer-nav-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-nav-list a {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color 200ms;
}
.footer-nav-list a:hover { color: var(--text-primary); }
.footer-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-disclaimer {
  font-size: 11px;
  color: var(--text-tertiary);
  line-height: 1.7;
  max-width: 620px;
  font-style: italic;
}
.footer-copy {
  font-size: 11px;
  color: var(--text-tertiary);
  white-space: nowrap;
  padding-top: 2px;
}

/* ======================================================
   FLOATING WHATSAPP BUTTON
   ====================================================== */
.wa-float {
  position: fixed;
  bottom: 28px;
  right: 24px;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #25D366;
  color: #fff;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
  box-shadow: 0 4px 20px rgba(37,211,102,0.45);
  transition: all 200ms var(--ease);
  text-decoration: none;
}
.wa-float:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(37,211,102,0.55);
}

/* ======================================================
   THEME TOGGLE & NAV ACTIONS
   ====================================================== */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.theme-toggle {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(255,255,255,0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 200ms var(--ease);
  flex-shrink: 0;
}
.theme-toggle:hover { background: rgba(255,255,255,0.10); color: var(--text-primary); }
.icon-sun  { display: none; }
.icon-moon { display: block; }
[data-theme="light"] .icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: none; }

.btn-outline-green {
  background: transparent;
  color: var(--green);
  border: 1.5px solid var(--green);
}
.btn-outline-green:hover { background: rgba(35,167,69,0.10); }

/* Logo properly sized from cropped PNG */
.logo-img {
  height: 34px;
  width: auto;
  display: block;
}

/* ======================================================
   LIGHT MODE
   ====================================================== */
[data-theme="light"] {
  --black:          #F3F7F4;
  --surface-0:      #F3F7F4;
  --surface-1:      #FFFFFF;
  --surface-2:      #E8F0EB;
  --deep-green:     #D4ECDA;
  --border:         rgba(0,0,0,0.09);
  --border-green:   rgba(35,167,69,0.28);
  --text-primary:   #0C1A0F;
  --text-secondary: rgba(12,26,15,0.62);
  --text-tertiary:  rgba(12,26,15,0.38);
  --shadow-card:    0 2px 8px rgba(0,0,0,0.08);
  --shadow-mid:     0 4px 16px rgba(0,0,0,0.10);
  --shadow-high:    0 8px 32px rgba(0,0,0,0.12), 0 0 0 1px rgba(35,167,69,0.15);
}
[data-theme="light"] body { background: var(--surface-0); }
[data-theme="light"] .nav {
  background: rgba(243,247,244,0.92);
  border-bottom-color: rgba(0,0,0,0.08);
}
[data-theme="light"] .theme-toggle {
  background: rgba(0,0,0,0.05);
  border-color: rgba(0,0,0,0.12);
  color: var(--text-secondary);
}
[data-theme="light"] .btn-ghost {
  background: rgba(0,0,0,0.05);
  color: var(--text-primary);
  border-color: rgba(0,0,0,0.14);
}
[data-theme="light"] .btn-ghost:hover { background: rgba(0,0,0,0.09); }
[data-theme="light"] .hero {
  background: radial-gradient(ellipse 70% 80% at 10% 5%, #C8E6D0 0%, #F3F7F4 55%, #D8EEE0 100%);
}
[data-theme="light"] .how-section {
  background: radial-gradient(ellipse 70% 80% at 90% 90%, #C8E6D0 0%, #F3F7F4 60%);
}
[data-theme="light"] .usdt-section {
  background: radial-gradient(ellipse 70% 80% at 90% 10%, #C8E6D0 0%, #F3F7F4 60%);
}
[data-theme="light"] .cta-section {
  background: radial-gradient(ellipse 80% 100% at 50% 50%, #C8E6D0 0%, #F3F7F4 65%);
}
[data-theme="light"] .trust-band { background: #E8F0EB; }
[data-theme="light"] .footer { background: #E8F0EB; border-top-color: rgba(0,0,0,0.08); }
[data-theme="light"] .logo-img { filter: brightness(0); }
[data-theme="light"] .footer-logo { filter: brightness(0); }
[data-theme="light"] .hero-bg-x { filter: brightness(0); opacity: 0.03; }
[data-theme="light"] .badge-green {
  background: rgba(35,167,69,0.10);
  border-color: rgba(35,167,69,0.25);
}
[data-theme="light"] .compliance-item { background: rgba(0,0,0,0.03); }
[data-theme="light"] .usdt-info-card { background: #fff; border-color: rgba(0,0,0,0.09); }
[data-theme="light"] .faq-item { border-bottom-color: rgba(0,0,0,0.09); }
[data-theme="light"] .wa-float { box-shadow: 0 4px 20px rgba(37,211,102,0.35); }
[data-theme="light"] .step-num { background: #fff; }

/* ======================================================
   HERO BUY/SELL WIDGET
   ====================================================== */
.hero-widget {
  width: 340px;
  flex-shrink: 0;
  background: var(--surface-1);
  border: 1px solid rgba(35,167,69,0.22);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow-high);
}
.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.widget-tabs {
  display: flex;
  gap: 3px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: 20px;
}
[data-theme="light"] .widget-tabs { background: rgba(0,0,0,0.05); }
.w-tab {
  flex: 1;
  padding: 8px;
  border-radius: 5px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-body);
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 180ms var(--ease);
  text-transform: capitalize;
}
.w-tab.active {
  background: var(--green);
  color: #fff;
  box-shadow: 0 2px 8px rgba(35,167,69,0.35);
}
.w-tab:not(.active):hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
[data-theme="light"] .w-tab:not(.active):hover { background: rgba(0,0,0,0.06); }

.widget-fields { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.widget-field { display: flex; flex-direction: column; gap: 5px; }
.wf-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.wf-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.wf-input-wrap input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  padding: 11px 52px 11px 14px;
  outline: none;
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}
[data-theme="light"] .wf-input-wrap input { background: rgba(0,0,0,0.04); }
.wf-input-wrap input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(35,167,69,0.12);
}
.wf-input-wrap input[readonly] { color: var(--text-secondary); cursor: default; }
.wf-suffix {
  position: absolute;
  right: 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.04em;
  pointer-events: none;
}
.widget-arrow {
  display: flex;
  justify-content: center;
  padding: 2px 0;
  color: var(--text-tertiary);
}
.widget-rate {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}
[data-theme="light"] .widget-rate { background: rgba(0,0,0,0.04); border-color: rgba(0,0,0,0.07); }
.wr-label { font-size: 11px; color: var(--text-tertiary); }
.wr-value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--neon);
  letter-spacing: 0.02em;
}
[data-theme="light"] .wr-value { color: var(--green); }
.widget-note {
  text-align: center;
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 10px;
}

/* ======================================================
   BINANCE SECTION
   ====================================================== */
.binance-section { background: var(--surface-0); }
.binance-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}
.binance-left { display: flex; flex-direction: column; gap: 24px; }
.binance-badge-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}
.binance-logo-mark {
  width: 52px;
  height: 52px;
  background: #181A20;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid rgba(243,186,47,0.3);
}
.pro-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: #F3BA2F;
  background: rgba(243,186,47,0.10);
  border: 1px solid rgba(243,186,47,0.25);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
}
.binance-title {
  font-family: var(--font-heading);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 12px;
}
.binance-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}
.btn-binance {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #F3BA2F;
  color: #181A20;
  font-weight: 700;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  transition: all 200ms var(--ease);
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
}
.btn-binance:hover {
  background: #F8CB5A;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(243,186,47,0.4);
}
.binance-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.bstat {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  transition: border-color 200ms;
}
.bstat:hover { border-color: rgba(243,186,47,0.25); }
.bstat-value {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.bstat-accent { color: #F3BA2F; }
.bstat-label {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ======================================================
   REVIEWS CAROUSEL
   ====================================================== */
.reviews-section { background: var(--surface-1); }
.reviews-carousel-wrap { overflow: hidden; }
.reviews-track {
  display: flex;
  gap: 16px;
  transition: transform 420ms cubic-bezier(0.4,0,0.2,1);
  will-change: transform;
}
.reviews-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}
.reviews-arrow {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 200ms var(--ease);
  flex-shrink: 0;
}
.reviews-arrow:hover { border-color: var(--green); color: var(--green); background: rgba(35,167,69,0.08); }
.reviews-arrow:disabled { opacity: 0.3; cursor: default; }
[data-theme="light"] .reviews-arrow { background: rgba(0,0,0,0.05); }
.rdots { display: flex; gap: 6px; align-items: center; }
.rdot {
  width: 6px; height: 6px;
  border-radius: 3px;
  background: var(--border);
  transition: all 250ms var(--ease);
  cursor: pointer;
}
.rdot.active { background: var(--green); width: 20px; }
[data-theme="light"] .rdot { background: rgba(0,0,0,0.15); }
[data-theme="light"] .rdot.active { background: var(--green); }
.reviews-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.reviews-score {
  display: flex;
  align-items: center;
  gap: 20px;
}
.reviews-score-num {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}
.reviews-score-detail { display: flex; flex-direction: column; gap: 4px; }
.stars-row {
  display: flex;
  gap: 3px;
  color: #F59E0B;
}
.reviews-count {
  font-size: 14px;
  color: var(--text-secondary);
}
.reviews-rank {
  font-size: 12px;
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.03em;
}
.btn-google {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-2);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 11px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
  transition: all 200ms var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
[data-theme="light"] .btn-google { background: #fff; }
.btn-google:hover { border-color: rgba(35,167,69,0.3); transform: translateY(-1px); }
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.review-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}
[data-theme="light"] .review-card { background: var(--surface-0); }
.review-card:hover { border-color: rgba(35,167,69,0.2); transform: translateY(-2px); }
.review-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(35,167,69,0.15);
  border: 1px solid rgba(35,167,69,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
  flex-shrink: 0;
}
.review-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.review-date { font-size: 11px; color: var(--text-tertiary); margin-top: 2px; }
.review-stars { display: flex; gap: 2px; margin-bottom: 10px; color: #F59E0B; font-size: 13px; }
.review-text { font-size: 13px; color: var(--text-secondary); line-height: 1.65; }
.reviews-disclaimer {
  text-align: center;
  margin-top: 24px;
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ======================================================
   ENTRANCE ANIMATIONS
   ====================================================== */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ======================================================
   RESPONSIVE — TABLET (≤960px)
   ====================================================== */
@media (max-width: 960px) {
  :root { --gutter: 24px; }

  /* Layout */
  .hero-inner     { flex-direction: column; gap: 40px; }
  .hero-card      { width: 100%; max-width: 480px; align-self: center; }
  .hero-widget    { width: 100%; max-width: 480px; align-self: center; }
  .services-grid  { grid-template-columns: 1fr; }
  .audience-grid  { grid-template-columns: 1fr; }
  .benefits-grid  { grid-template-columns: 1fr 1fr; }
  .security-inner { grid-template-columns: 1fr; gap: 40px; }
  .usdt-inner     { grid-template-columns: 1fr; gap: 40px; }
  .footer-top     { grid-template-columns: 1fr 1fr; }
  .trust-sep      { display: none; }

  /* Binance section */
  .binance-inner  { grid-template-columns: 1fr; gap: 40px; }
  .binance-stats  { grid-template-columns: repeat(2,1fr); }

  /* Reviews header */
  .reviews-header { flex-direction: column; align-items: flex-start; gap: 16px; }

  /* Navbar: hide login/register on tablet, keep theme+consultar */
  .nav #btn-login    { display: none; }
  .nav #btn-register { display: none; }
}

/* ======================================================
   RESPONSIVE — MOBILE (≤640px)
   ====================================================== */
@media (max-width: 640px) {
  .section    { padding: 64px 0; }
  .section-sm { padding: 48px 0; }

  /* Hero */
  .hero { padding-top: calc(var(--nav-height) + 48px) !important; padding-bottom: 64px; }
  .hero-ctas      { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { justify-content: center; }

  /* Navbar: compact — logo + theme + consultar only */
  .nav { padding: 0 16px; }
  .nav-links   { display: none !important; }
  .nav .btn-ghost,
  .nav #btn-login,
  .nav #btn-register { display: none; }
  .nav .btn-primary.btn-sm { font-size: 13px; padding: 9px 14px; }
  .logo-img    { height: 22px; }

  /* Trust band */
  .trust-inner { flex-direction: column; align-items: flex-start; gap: 20px; }

  /* Stepper — vertical */
  .stepper { flex-direction: column; gap: 0; }
  .stepper::before { display: none; }
  .step {
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
    padding: 20px 0;
    gap: 20px;
    position: relative;
  }
  .step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 19px;
    top: 40px;
    bottom: 0;
    width: 1px;
    background: var(--border-green);
  }
  .step-num    { margin-bottom: 0; flex-shrink: 0; }
  .step-content { flex: 1; padding-top: 8px; }

  /* Grids */
  .benefits-grid { grid-template-columns: 1fr; }
  .footer-top    { grid-template-columns: 1fr; }
  .binance-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .binance-inner { gap: 32px; }
  .bstat         { padding: 14px 12px; }
  .bstat-value   { font-size: 18px; }

  /* Reviews */
  .reviews-header { flex-direction: column; align-items: flex-start; gap: 14px; }
  .reviews-score-num { font-size: 44px; }
  .reviews-grid  { grid-template-columns: 1fr; }
  .btn-google    { font-size: 13px; padding: 9px 14px; }

  /* KYC */
  .kyc-cta-wrap { padding: 0 8px; }
  .badge-kyc    { font-size: 12px; padding: 7px 14px; }

  /* Widget */
  .wf-input-wrap select { font-size: 11px; }

  /* Floating buttons */
  .wa-float     { padding: 14px; border-radius: 50%; }
  .wa-float span { display: none; }
  #binance-float-btn { bottom: 90px; right: 16px; }
  #binance-float-btn .btn-binance-float {
    padding: 10px 14px;
    font-size: 12px;
  }
  #binance-float-btn .btn-binance-float img { height: 16px; }

  /* USDT info card — remove sticky on mobile */
  .usdt-info-card { position: static !important; top: auto !important; }

  /* Typography scale down */
  .display { font-size: clamp(30px, 8vw, 44px); }
  .section-title { font-size: clamp(20px, 5vw, 26px); }
  .cta-headline  { font-size: clamp(22px, 6vw, 32px); }

  /* Modal */
  .kyc-modal-card { padding: 28px 20px; }
  .kyc-modal-title { font-size: 20px; }

  /* Didit phone carousel */
  .phone-frame { width: 148px; }

  /* Section headers */
  .section-header { margin-bottom: 36px; }
}