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

:root {
  --pink: #e91e8c;
  --pink-light: #ff4db2;
  --pink-dark: #c0006e;
  --dark: #0f0f1a;
  --dark2: #1a1a2e;
  --card-bg: #1e1e30;
  --text: #f0f0f0;
  --muted: #a0a0b8;
  --white: #ffffff;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 16px;
}

html {
  scroll-behavior: smooth;
}
body {
  font-family: "Be Vietnam Pro", sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
}

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

/* ── HEADER ── */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  height: 68px;
  background: rgba(15, 15, 26, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--pink), #ff8cd8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
nav {
  display: flex;
  gap: 32px;
}
nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s;
}
nav a:hover,
nav a.active {
  color: var(--white);
}
.btn-zalo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--pink), var(--pink-dark));
  color: #fff;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: opacity 0.2s;
}
.btn-zalo:hover {
  opacity: 0.85;
}
.btn-zalo img {
  width: 20px;
  height: 20px;
  margin-right: 8px;
  border-radius: 4px;
  display: block;
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 5% 60px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(
      ellipse 80% 60% at 60% 30%,
      rgba(233, 30, 140, 0.18) 0%,
      transparent 70%
    ),
    var(--dark);
}
.hero-content {
  max-width: 560px;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-block;
  background: rgba(233, 30, 140, 0.15);
  border: 1px solid rgba(233, 30, 140, 0.4);
  color: var(--pink-light);
  border-radius: 50px;
  padding: 4px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--pink), #ff8cd8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 32px;
  max-width: 460px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-cta .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.hero-cta .btn-primary img {
  width: 20px;
  height: 20px;
  margin-right: 8px;
  border-radius: 4px;
  display: block;
}
.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--pink-dark));
  color: #fff;
  padding: 14px 28px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 8px 24px rgba(233, 30, 140, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(233, 30, 140, 0.45);
}
.btn-secondary {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  color: var(--text);
  padding: 14px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: border-color 0.2s, color 0.2s;
}
.btn-secondary:hover {
  border-color: var(--pink);
  color: var(--pink);
}
.hero-stats {
  display: flex;
  gap: 36px;
}
.stat strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--white);
}
.stat span {
  font-size: 0.8rem;
  color: var(--muted);
}
.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  pointer-events: none;
  z-index: 1;
}
.hero-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}
.hero-card img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  display: block;
}
.glow-circle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(233, 30, 140, 0.25) 0%,
    transparent 70%
  );
  pointer-events: none;
}
.glow1 {
  width: 500px;
  height: 500px;
  top: -100px;
  right: -100px;
}
.glow2 {
  width: 300px;
  height: 300px;
  bottom: 100px;
  left: -50px;
}

/* ── SECTION COMMON ── */
section {
  padding: 80px 5%;
}
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--pink);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.section-sub {
  color: var(--muted);
  max-width: 520px;
  font-size: 0.95rem;
}
.text-center {
  text-align: center;
}
.text-center .section-sub {
  margin: 0 auto;
}

/* ── FEATURES ── */
.features {
  background: var(--dark2);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.25s, transform 0.25s;
}
.feature-card:hover {
  border-color: rgba(233, 30, 140, 0.4);
  transform: translateY(-4px);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(
    135deg,
    rgba(233, 30, 140, 0.2),
    rgba(233, 30, 140, 0.05)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ── WALLETS ── */
.wallets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 48px;
} 
.wallet-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: border-color 0.25s, transform 0.25s;
  cursor: pointer;
}
.wallet-card:hover {
  border-color: rgba(233, 30, 140, 0.5);
  transform: translateY(-4px);
}
.wallet-logo {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, #2a2a40, #1e1e30);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 14px;
  border: 1px solid var(--border);
}
.wallet-logo img {
  width: 60px;
  height: 60px;
  border-radius: 16px;
}
.wallet-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.wallet-card .limit {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 14px;
}
.wallet-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 16px;
}
.tag {
  background: rgba(233, 30, 140, 0.12);
  border: 1px solid rgba(233, 30, 140, 0.3);
  color: var(--pink-light);
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 20px;
}
.wallet-btn {
  background: linear-gradient(135deg, var(--pink), var(--pink-dark));
  color: #fff;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}
.wallet-btn:hover {
  opacity: 0.85;
}

/* ── CALCULATOR ── */
.calculator {
  background: var(--dark2);
}
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 48px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
}
.calc-form {
  padding: 36px;
}
.calc-result {
  padding: 36px;
  background: rgba(233, 30, 140, 0.06);
  border-left: 1px solid var(--border);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
}
.form-group select option {
  background-color: #2a2a2a; /* nền đậm hơn */
  color: #fff;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--pink);
}
.radio-group {
  display: flex;
  gap: 12px;
}
.radio-opt {
  flex: 1;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: border-color 0.2s;
}
.radio-opt input[type="radio"] {
  accent-color: var(--pink);
}
.radio-opt:has(input:checked) {
  border-color: var(--pink);
  background: rgba(233, 30, 140, 0.08);
}
.calc-form .btn-primary {
  width: 100%;
  border-radius: 12px;
  margin-top: 4px;
}
.result-card {
  background: rgba(233, 30, 140, 0.08);
  border-radius: 16px;
  padding: 24px;
}
.result-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.result-row:last-child {
  border: none;
}
.result-row .label {
  color: var(--muted);
}
.result-row .value {
  font-weight: 600;
}
.result-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--pink-light);
  margin: 16px 0 4px;
}
.result-note {
  font-size: 0.75rem;
  color: var(--muted);
}
.placeholder-msg {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ── PROCESS ── */
.steps {
  display: flex;
  gap: 0;
  margin-top: 56px;
  position: relative;
}
.steps::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--pink), var(--pink-dark));
  z-index: 0;
}
.step {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--pink-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0 auto 20px;
  box-shadow: 0 0 0 6px var(--dark), 0 0 0 8px rgba(233, 30, 140, 0.3);
}
.step h3 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.step p {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0 12px;
}

/* ── FAQ ── */
.faq {
  background: var(--dark2);
}
.faq-list {
  margin-top: 48px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-q {
  padding: 18px 22px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}
.faq-q:hover {
  background: rgba(255, 255, 255, 0.03);
}
.faq-q .arrow {
  transition: transform 0.3s;
  font-size: 1.1rem;
  color: var(--pink);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 0 22px;
}
.faq-item.open .faq-a {
  max-height: 200px;
  padding: 0 22px 18px;
}
.faq-item.open .arrow {
  transform: rotate(180deg);
}

/* ── TRUST ── */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 48px;
}
.trust-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
}
.trust-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.trust-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.trust-card p {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ── CONTACT STRIP ── */
.contact-strip {
  background: linear-gradient(135deg, var(--pink-dark), var(--pink));
  padding: 60px 5%;
  text-align: center;
}
.contact-strip a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.contact-strip a img {
  width: 20px;
  height: 20px;
  margin-right: 8px;
  border-radius: 4px;
  display: block;
}
.contact-strip h2 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.contact-strip p {
  font-size: 0.95rem;
  margin-bottom: 28px;
  opacity: 0.9;
}
.contact-strip .btn-white {
  background: #fff;
  color: var(--pink-dark);
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s;
}
.contact-strip .btn-white:hover {
  transform: scale(1.03);
}

/* ── FOOTER ── */
footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding: 56px 5% 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo {
  font-size: 1.4rem;
  display: inline-block;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--muted);
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 10px;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--pink-light);
}
.contact-info {
  font-size: 0.85rem;
  color: var(--muted);
}
.contact-info p {
  margin-bottom: 8px;
}
.contact-info strong {
  color: var(--pink-light);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted);
}
.warning-box {
  background: rgba(255, 165, 0, 0.08);
  border: 1px solid rgba(255, 165, 0, 0.3);
  border-radius: 12px;
  padding: 16px 20px;
  margin-top: 32px;
  font-size: 0.85rem;
  color: #ffc947;
}
.warning-box strong {
  display: block;
  margin-bottom: 4px;
}

/* ── FLOAT BTN ── */
.float-zalo {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 200;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0a84f8, #06c);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 8px 24px rgba(0, 100, 240, 0.4);
  transition: transform 0.2s;
  text-decoration: none;
}
.float-zalo:hover {
  transform: scale(1.1);
}
.float-zalo img {
  width: 60px;
  height: 60px;
  border-radius: 16px;
}

/* ── MOBILE ── */
@media (max-width: 900px) {
  .hero-visual {
    display: none;
  }
  .calc-wrapper {
    grid-template-columns: 1fr;
  }
  .calc-result {
    border-left: none;
    border-top: 1px solid var(--border);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .steps {
    flex-direction: column;
    gap: 32px;
  }
  .steps::before {
    display: none;
  }
  nav {
    display: none;
  }
}
@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    gap: 20px;
  }
}