:root {
  --bg-dark: #050816;
  --bg-dark-soft: #0b1020;
  --bg-card: #0f172a;
  --primary: #e11b22; /* đỏ Mỹ */
  --primary-soft: rgba(225, 27, 34, 0.12);
  --accent: #38bdf8;  /* xanh kỹ thuật */
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --border-subtle: rgba(148, 163, 184, 0.35);
  --radius-xl: 1.25rem;
  --radius-lg: 0.9rem;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.85);
  --shadow-strong: 0 22px 60px rgba(0, 0, 0, 0.9);
  --transition-fast: 0.18s ease-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at top, #111827 0, #020617 55%, #000 100%);
  color: var(--text-main);
  line-height: 1.6;
}

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

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

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: linear-gradient(to right, rgba(3, 7, 18, 0.95), rgba(15, 23, 42, 0.96));
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(248, 250, 252, 0.28);
  background: radial-gradient(circle at 20% 0, #f97373 0, #b91c1c 40%, #0f172a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.95), 0 0 32px rgba(239, 68, 68, 0.45);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.07em;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: 'Oswald', system-ui, sans-serif;
  font-size: 1.15rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-muted);
}

.nav {
  display: none;
  align-items: center;
  gap: 1.2rem;
  font-size: 0.88rem;
}

.nav a {
  color: var(--text-muted);
  padding: 0.2rem 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav a:hover {
  color: #f9fafb;
  border-color: rgba(248, 250, 252, 0.5);
}

.nav-cta {
  padding: 0.4rem 0.95rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  color: #f9fafb;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(248, 113, 113, 0.45);
  border: none;
  cursor: pointer;
}

.nav-cta:hover {
  filter: brightness(1.08);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: radial-gradient(circle at top, #111827 0, #020617 80%);
  cursor: pointer;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
}

.nav-toggle span::before {
  top: -5px;
}

.nav-toggle span::after {
  top: 5px;
}

.nav-mobile {
  display: none;
  padding: 0 0 0.75rem;
}

.nav-mobile-list {
  list-style: none;
  border-radius: 0 0 1rem 1rem;
  border: 1px solid rgba(31, 41, 55, 0.95);
  background: radial-gradient(circle at 0 0, #111827 0, #020617 55%);
  padding: 0.5rem 0.9rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.7);
}

.nav-mobile-list li + li {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
}

.nav-mobile-list a {
  display: block;
  padding: 0.55rem 0.2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.nav-mobile-list a:hover {
  color: #f9fafb;
}

.nav-mobile-cta {
  margin-top: 0.5rem;
  width: 100%;
  text-align: center;
  font-size: 0.88rem;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  color: #f9fafb;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(248, 113, 113, 0.45);
  border: none;
  display: inline-flex;
  justify-content: center;
  cursor: pointer;
}

/* HERO */
.hero {
  padding: 2.4rem 0 3.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr);
  gap: 2.2rem;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.75rem;
  border-radius: 999px;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.18), rgba(15, 23, 42, 0.95));
  color: #e0f2fe;
}

/* Flag mini – 3 dải ngang đỏ / trắng / xanh navy, gợi nhớ US */
.pill-flag {
  width: 16px;
  height: 11px;
  border-radius: 2px;
  background: linear-gradient(
    to bottom,
    #b91c1c 0%,
    #b91c1c 33%,
    #ffffff 33%,
    #ffffff 66%,
    #1e3a8a 66%,
    #1e3a8a 100%
  );
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.95);
}

.pill-tech {
  background: radial-gradient(circle at 0 0, rgba(248, 113, 113, 0.2), rgba(15, 23, 42, 0.96));
  border-color: rgba(248, 250, 252, 0.3);
  color: #fee2e2;
}

.hero-title {
  font-family: 'Oswald', system-ui, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 2rem;
  line-height: 1.1;
  margin-bottom: 0.8rem;
}

.hero-title span {
  display: inline-block;
  background: linear-gradient(135deg, #fee2e2, #f97373, #fef9c3);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: 0.96rem;
  color: var(--text-muted);
  max-width: 30rem;
  margin-bottom: 1.2rem;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.metric {
  border-radius: 999px;
  padding: 0.5rem 0.8rem;
  border: 1px solid rgba(75, 85, 99, 0.9);
  background: radial-gradient(circle at 0 0, rgba(248, 113, 113, 0.16), rgba(15, 23, 42, 0.96));
  font-size: 0.78rem;
  color: #e5e7eb;
}

.metric span {
  font-weight: 600;
  color: #fef3c7;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.4rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  color: #f9fafb;
  font-size: 0.92rem;
  font-weight: 600;
  box-shadow: 0 16px 36px rgba(248, 113, 113, 0.55);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.btn-primary:hover {
  filter: brightness(1.09);
  transform: translateY(-1px);
  box-shadow: 0 22px 50px rgba(239, 68, 68, 0.7);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.68rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.18), rgba(15, 23, 42, 0.96));
  color: #e5e7eb;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary:hover {
  border-color: rgba(248, 250, 252, 0.85);
  transform: translateY(-1px);
}

.hero-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  max-width: 26rem;
}

.hero-note-dot {
  margin-top: 0.35rem;
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.9);
  flex-shrink: 0;
}

/* HERO PRODUCT */
.hero-product {
  position: relative;
}

.hero-product-card {
  position: relative;
  border-radius: var(--radius-xl);
  padding: 1.2rem 1rem 1.05rem;
  background: radial-gradient(circle at 0 0, rgba(148, 163, 184, 0.15), #020617 65%, #000 100%);
  border: 1px solid rgba(30, 64, 175, 0.7);
  box-shadow: var(--shadow-strong);
  overflow: hidden;          /* giữ bo góc tổng thể */
  isolation: isolate;
}

.hero-glow {
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(circle at 10% 0, rgba(248, 113, 113, 0.4), transparent 55%),
    radial-gradient(circle at 90% 0, rgba(56, 189, 248, 0.4), transparent 55%),
    radial-gradient(circle at 50% 120%, rgba(249, 115, 22, 0.28), transparent 55%);
  opacity: 0.9;
  mix-blend-mode: screen;
  pointer-events: none;
}

/* Khung cắt ribbon theo bo góc card */
.badge-angle-wrapper {
  position: absolute;
  top: 0;
  right: 0;
  width: 110px;       /* thu nhỏ vùng cắt để không lòi */
  height: 110px;
  overflow: hidden;
  border-radius: 0 1.25rem 0 0;
  pointer-events: none;
}

.badge-angle {
  position: absolute;
  top: 16px;          /* kéo xuống một chút */
  right: -32px;       /* kéo vào trong một chút */
  transform: rotate(35deg);
  padding: 0.35rem 1.7rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #111827;
  box-shadow: 0 10px 18px rgba(251, 191, 36, 0.35);
}


.hero-bottle-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  margin-bottom: 0.8rem;
}

.hero-bottle {
  max-height: 260px;
  filter: drop-shadow(0 24px 38px rgba(0, 0, 0, 0.9));
  border-radius: 1rem;
  object-fit: contain;
}

.hero-product-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  font-size: 0.8rem;
}

.chip {
  padding: 0.5rem 0.65rem;
  border-radius: 0.95rem;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
}

.chip strong {
  display: block;
  font-size: 0.78rem;
  color: #fef9c3;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 0.13rem;
}

.chip span {
  font-size: 0.78rem;
  color: #cbd5f5;
}

.chip-highlight {
  border-color: rgba(248, 250, 252, 0.85);
  background: radial-gradient(circle at 0 0, rgba(248, 113, 113, 0.25), rgba(15, 23, 42, 0.98));
}

/* SECTION GENERIC */
section {
  padding: 2.6rem 0;
}

.section-header {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.section-header--compact {
  margin-bottom: 0.7rem;
}

.section-kicker {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.section-title {
  font-family: 'Oswald', system-ui, sans-serif;
  font-size: 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.section-description {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 34rem;
}

/* BENEFITS */
.benefits-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.benefit-card {
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--border-subtle);
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.1), rgba(15, 23, 42, 0.96));
  box-shadow: var(--shadow-soft);
}

.benefit-icon {
  width: 32px;
  height: 32px;
  border-radius: 0.9rem;
  background: radial-gradient(circle at 0 0, rgba(248, 113, 113, 0.4), rgba(15, 23, 42, 0.95));
  border: 1px solid rgba(254, 242, 242, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.benefit-title {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.benefit-text {
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* HOW IT WORKS + STATS */
.how-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.4rem;
}

.step-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.step-item {
  display: flex;
  gap: 0.6rem;
}

.step-number {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.4), rgba(15, 23, 42, 0.96));
  border: 1px solid rgba(148, 163, 184, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
}

.step-body-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.step-body-text {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.stat-card {
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid rgba(55, 65, 81, 0.9);
  background: radial-gradient(circle at 0 0, rgba(248, 113, 113, 0.15), rgba(15, 23, 42, 0.97));
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 0.3rem;
}

.stat-item {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stat-item strong {
  display: block;
  font-size: 1rem;
  color: #fef9c3;
}

/* REVIEWS */
.reviews-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.review-card {
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid rgba(31, 41, 55, 0.9);
  background: radial-gradient(circle at 0 0, rgba(15, 23, 42, 1), rgba(3, 7, 18, 1));
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.8);
  position: relative;
  overflow: hidden;
}

.review-card::before {
  content: '"';
  position: absolute;
  top: -14px;
  right: 14px;
  font-size: 4rem;
  color: rgba(55, 65, 81, 0.5);
  font-family: 'Oswald', system-ui, sans-serif;
}

.review-name {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.review-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.review-text {
  font-size: 0.86rem;
  color: #e5e7eb;
}

/* PRICING / BUY */
.pricing {
  padding-bottom: 4.4rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.plan-card {
  border-radius: var(--radius-xl);
  padding: 1.1rem;
  border: 1px solid rgba(55, 65, 81, 0.95);
  background: radial-gradient(circle at 0 0, rgba(15, 23, 42, 1), rgba(3, 7, 18, 1));
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;   /* thêm */
  overflow: hidden;     /* cắt mọi thứ theo bo góc */
}

.plan-card--highlight {
  border-color: rgba(248, 113, 113, 0.8);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.95);
}

.plan-card--highlight::before {
  content: 'BEST SELLER';
  position: absolute;
  top: 10px;           /* hạ nhẹ xuống */
  right: -38px;        /* kéo vào trong để không cấn mép */
  transform: rotate(35deg);
  padding: 0.25rem 2rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  background: linear-gradient(135deg, #f97316, #facc15);
  color: #111827;
  font-weight: 700;
}


.plan-header {
  margin-bottom: 0.6rem;
}

.plan-name {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.plan-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.plan-price {
  margin: 0.6rem 0 0.5rem;
}

.plan-price-main {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fef9c3;
}

.plan-price-main span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 0.2rem;
}

.plan-price-note {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin: 0.7rem 0 0.9rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.plan-features li {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.3rem;
}

.plan-dot {
  margin-top: 0.3rem;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.85);
  flex-shrink: 0;
}

.plan-cta-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.btn-plan-primary,
.btn-plan-secondary {
  width: 100%;
  text-align: center;
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

.btn-plan-primary {
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  color: #f9fafb;
  box-shadow: 0 14px 30px rgba(248, 113, 113, 0.55);
}

.btn-plan-primary:hover {
  filter: brightness(1.07);
}

.btn-plan-secondary {
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.16), rgba(15, 23, 42, 0.98));
  color: #e5e7eb;
}

.btn-plan-secondary:hover {
  border-color: rgba(248, 250, 252, 0.85);
}

/* FAQ */
.faq-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.faq-item {
  border-radius: var(--radius-lg);
  padding: 0.8rem 0.9rem;
  border: 1px solid rgba(31, 41, 55, 0.95);
  background: rgba(15, 23, 42, 0.95);
}

.faq-q {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.faq-a {
  font-size: 0.82rem;
  color: var(--text-muted);
}



/* FOOTER */
footer {
  border-top: 1px solid rgba(15, 23, 42, 0.95);
  background: #020617;
  padding: 1.4rem 0 4.1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
}

.footer-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.2rem;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: #e5e7eb;
}

.footer-links.legal-list li {
  margin-bottom: 0.45rem;
}

.footer-icon {
  margin-right: 0.4rem;
  font-size: 0.95rem;
  display: inline-block;
  width: 1.3rem;
}

.footer-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer-bottom {
  margin-top: 0.8rem;
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  padding-top: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: space-between;
  align-items: center;
}

.footer-policies {
  margin-top: 1rem;
  font-size: 0.9rem;
  opacity: 0.9;
}

.footer-policies a {
  color: #cbd5e1;
  text-decoration: none;
}

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

.footer-registered {
  margin-top: 0.6rem;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: #22c55e;
  font-weight: 600;
}

.footer-policy-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.95rem;
}

.footer-policy-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Bullet thường */
.footer-policy-list li::before {
  content: "•";
  color: #cbd5e1;
  font-size: 1.1rem;
  line-height: 1;
  margin-right: 0.2rem;
}

.footer-policy-list a {
  color: #cbd5e1;
  text-decoration: none;
}

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


/* MOBILE STICKY CTA */
.mobile-cta-bar {
  position: fixed;
  z-index: 50;
  left: 0;
  right: 0;
  bottom: 0;
  border-top: 1px solid rgba(31, 41, 55, 0.95);
  background: radial-gradient(circle at 0 0, #111827 0, #020617 55%, #000 100%);
  padding: 0.5rem 1rem 0.7rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.mobile-cta-info {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.mobile-cta-info strong {
  display: block;
  font-size: 0.86rem;
  color: #f9fafb;
}

.mobile-cta-btn {
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  color: #f9fafb;
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 10px 25px rgba(248, 113, 113, 0.55);
  cursor: pointer;
}

/* RESPONSIVE */
@media (min-width: 640px) {
  .hero-title {
    font-size: 2.4rem;
  }

  .hero {
    padding-top: 3rem;
  }

  section {
    padding: 3.2rem 0;
  }

  .benefits-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .reviews-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .pricing-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1.3fr 1.2fr;
  }
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }

  .hero-product-card {
    margin-left: auto;
    max-width: 340px;
  }

  .how-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }

  .hero {
    padding-bottom: 4rem;
  }

  .pricing {
    padding-bottom: 4.8rem;
  }

  footer {
    padding-bottom: 2rem;
  }

  .mobile-cta-bar {
    display: none;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 2.7rem;
  }

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

  .header-inner {
    padding: 1rem 0;
  }
}

/* ==== SECURITY SECTION ==== */
#security {
  padding: 4rem 0 3rem;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.8rem;
}

.security-card {
  background: rgba(15,23,42,0.85);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1.1rem;
  padding: 1.6rem 1.8rem;
  position: relative;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  backdrop-filter: blur(7px);
}

.security-icon {
  font-size: 1.9rem;
  margin-bottom: 0.6rem;
}

.security-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.security-text {
  color: #cbd5e1;
  line-height: 1.55;
  margin-bottom: 0.9rem;
}

.security-list {
  padding-left: 1.2rem;
  color: #cbd5e1;
}

.security-list li {
  margin-bottom: 0.35rem;
}

.security-step-list {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.security-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #2563eb;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  margin-right: 0.55rem;
}

.security-step-list li {
  display: flex;
  gap: 0.6rem;
}

.security-note {
  margin-top: 1rem;
  color: #94a3b8;
  font-size: 0.9rem;
  border-top: 1px dashed rgba(255,255,255,0.1);
  padding-top: 0.8rem;
}


/* ==== AUTHENTICITY ARROW FLOW ==== */
.auth-flow-wrapper {
  margin-top: 1.8rem;
}

.auth-flow-heading {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.9rem;
}

.auth-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
}

.auth-flow-card {
  position: relative;
  padding-top: 4.3rem;
  background: rgba(15,23,42,0.95);
  border-radius: 1rem;
  border: 1px solid rgba(148,163,184,0.4);
  box-shadow: 0 16px 40px rgba(0,0,0,0.6);
  overflow: hidden;
}

.auth-flow-head {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4rem;
  padding: 0.4rem 1.1rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #f9fafb;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  clip-path: polygon(0 0, 80% 0, 100% 50%, 80% 100%, 0 100%, 6% 50%);
}

/* màu từng bước */
.auth-flow-card.step-1 .auth-flow-head {
  background: linear-gradient(135deg, #f97316, #ef4444);
}
.auth-flow-card.step-2 .auth-flow-head {
  background: linear-gradient(135deg, #ec4899, #8b5cf6);
}
.auth-flow-card.step-3 .auth-flow-head {
  background: linear-gradient(135deg, #6366f1, #0ea5e9);
}

.auth-flow-step-number {
  font-size: 1.5rem;
  line-height: 1;
}

.auth-flow-body {
  padding: 0.9rem 1.2rem 1.3rem;
}

.auth-flow-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.auth-flow-text {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.6;
}

.auth-flow-warning {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #9ca3af;
}

/* Responsive */
@media (max-width: 960px) {
  .auth-flow {
    grid-template-columns: minmax(0, 1fr);
  }

  .auth-flow-card {
    padding-top: 4rem;
  }
}

.highlight-note {
  margin-top: 0.6rem;
  color: #dbeafe;
  font-size: 0.95rem;
  line-height: 1.55;
  background: rgba(255,255,255,0.04);
  padding: 0.8rem 1rem;
  border-left: 3px solid #60a5fa;
  border-radius: 6px;
}

.highlight-note strong {
  color: #ffffff;
}

.mail-link {
  color: #93c5fd;
  text-decoration: underline;
}