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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #e0e0e0;
  background: #0a0a0a;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

/* ===== Container ===== */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Typography ===== */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  color: #fff;
}

.section-subtitle {
  text-align: center;
  color: #999;
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* ===== Button ===== */
.btn {
  display: inline-block;
  background: #33e78c;
  color: #0a0a0a;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  text-align: center;
}

.btn:hover {
  background: #2bcc7a;
  transform: translateY(-1px);
}

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

.btn-sm {
  padding: 10px 20px;
  font-size: 0.9rem;
  border-radius: 10px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.btn-full {
  width: 100%;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

.logo span {
  color: #33e78c;
}

/* ===== Hero ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(170deg, #0f1a12 0%, #0a0a0a 60%);
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #fff;
}

.hero-sub {
  font-size: 1.15rem;
  color: #aaa;
  margin-bottom: 32px;
  max-width: 480px;
  line-height: 1.7;
}

.hero-visual {
  flex: 0 0 320px;
  display: flex;
  justify-content: center;
}

/* Phone Mockup */
.phone-mockup {
  width: 260px;
  background: #111;
  border-radius: 32px;
  padding: 12px;
  border: 1px solid #222;
  box-shadow: 0 24px 64px rgba(51, 231, 140, 0.12), 0 8px 24px rgba(0,0,0,0.3);
}

.phone-screen {
  background: #0f0f0f;
  border-radius: 22px;
  padding: 24px 20px;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.phone-header {
  margin-bottom: 20px;
}

.phone-logo {
  font-weight: 800;
  font-size: 1.1rem;
  color: #33e78c;
}

.phone-balance {
  text-align: center;
  margin-bottom: 24px;
}

.balance-label {
  display: block;
  font-size: 0.75rem;
  color: #888;
  margin-bottom: 4px;
}

.balance-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
}

.phone-qr {
  text-align: center;
}

.qr-placeholder {
  background: #1a1a1a;
  border-radius: 16px;
  padding: 16px;
  display: inline-block;
  margin-bottom: 8px;
}

.qr-label {
  font-size: 0.75rem;
  color: #888;
}

/* ===== Problem Section ===== */
.problem {
  padding: 96px 0;
  background: #0f0f0f;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.problem-card {
  background: #161616;
  border-radius: 16px;
  padding: 32px;
  border: 1px solid #222;
  transition: box-shadow 0.2s;
}

.problem-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.problem-icon {
  color: #e74c3c;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.problem-card h3 {
  color: #fff;
}

.problem-card p {
  color: #999;
  font-size: 0.95rem;
}

/* ===== Solution / Steps ===== */
.solution {
  padding: 96px 0;
}

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

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 36px;
  height: 36px;
  background: #33e78c;
  color: #0a0a0a;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin: 0 auto 16px;
}

.step-icon {
  color: #33e78c;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step h3 {
  color: #fff;
}

.step p {
  color: #999;
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== Benefits ===== */
.benefits {
  padding: 96px 0;
  background: #0f0f0f;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit-card {
  background: #161616;
  border-radius: 16px;
  padding: 32px;
  border: 1px solid #222;
  transition: box-shadow 0.2s, transform 0.2s;
}

.benefit-card:hover {
  box-shadow: 0 8px 24px rgba(51, 231, 140, 0.08);
  transform: translateY(-2px);
}

.benefit-icon {
  color: #33e78c;
  margin-bottom: 16px;
  width: 48px;
  height: 48px;
  background: rgba(51, 231, 140, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.benefit-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.benefit-card h3 {
  color: #fff;
}

.benefit-card p {
  color: #999;
  font-size: 0.9rem;
}

/* ===== Social Proof ===== */
.social-proof {
  padding: 64px 0;
}

.proof-banner {
  background: linear-gradient(135deg, #0f1a12, #142218);
  border: 1px solid #33e78c33;
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  color: #fff;
}

.proof-text {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.proof-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.badge {
  background: rgba(51, 231, 140, 0.12);
  color: #33e78c;
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid rgba(51, 231, 140, 0.2);
}

/* ===== WhatsApp CTA ===== */
.waitlist {
  padding: 96px 0;
  background: #0f0f0f;
}

.whatsapp-cta {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #25D366;
  color: #fff;
  font-size: 1.15rem;
  padding: 18px 40px;
  border-radius: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.btn-whatsapp:hover {
  background: #1ebe5d;
}

.btn-whatsapp svg {
  flex-shrink: 0;
}

.form-note {
  text-align: center;
  font-size: 0.85rem;
  color: #888;
}

/* ===== FAQ ===== */
.faq {
  padding: 96px 0;
}

.faq-list {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #161616;
  border: 1px solid #222;
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.faq-item:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  color: #fff;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: #33e78c;
  font-weight: 600;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 24px 20px;
  color: #999;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== Footer ===== */
.footer {
  background: #050505;
  color: #ccc;
  padding: 64px 0 32px;
  border-top: 1px solid #1a1a1a;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.footer-brand {
  text-align: center;
}

.footer .logo {
  color: #fff;
  font-size: 1.3rem;
}

.footer .logo span {
  color: #33e78c;
}

.footer-brand p {
  margin-top: 8px;
  font-size: 0.9rem;
  color: #888;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.footer-links a {
  font-size: 0.9rem;
  color: #aaa;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #fff;
}

.footer-contact a {
  color: #33e78c;
}

.footer-contact a:hover {
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  width: 100%;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: #666;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .hero-sub {
    margin: 0 auto 32px;
  }

  .hero-visual {
    flex: none;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .section-title {
    font-size: 1.6rem;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-text h1 {
    font-size: 1.8rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .proof-banner {
    padding: 32px 20px;
  }

  .proof-text {
    font-size: 1.15rem;
  }

  .problem,
  .solution,
  .benefits,
  .waitlist,
  .faq {
    padding: 64px 0;
  }

  .phone-mockup {
    width: 220px;
  }

  .phone-screen {
    min-height: 300px;
    padding: 20px 16px;
  }

  .qr-placeholder svg {
    width: 100px;
    height: 100px;
  }
}

@media (max-width: 400px) {
  .hero-text h1 {
    font-size: 1.5rem;
  }

  .steps {
    grid-template-columns: 1fr;
  }
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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