/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  box-shadow: var(--shadow-soft);
}

.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.btn--outline {
  background: var(--color-white);
  color: var(--color-secondary);
  border: 2px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-3px);
}

.btn--store {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: 12px 24px 12px 18px;
  border-radius: var(--radius-md);
  text-align: left;
}

.btn--store:hover {
  background: var(--color-secondary-light);
  transform: translateY(-3px);
}

.btn__store-icon {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.btn__store-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.btn--store .btn__store-sub {
  font-size: 0.65rem;
  font-weight: 400;
  opacity: 0.8;
}

.btn--store .btn__store-main {
  font-size: 0.95rem;
  font-weight: 700;
}

/* ====== Header ====== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(253, 243, 248, 0.7);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background var(--transition-base), box-shadow var(--transition-base), padding var(--transition-base);
  padding: 22px 0;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 24px -10px rgba(229, 20, 122, 0.25);
  padding: 12px 0;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-secondary);
}

.brand img {
  height: 64px;
  width: auto;
  transition: height var(--transition-base);
}

.site-header.scrolled .brand img {
  height: 52px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.main-nav__list > li {
  position: relative;
}

.main-nav__list a {
  font-weight: 600;
  color: var(--color-secondary);
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-base);
}

.main-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.main-nav__list a:hover,
.main-nav__list a.is-active {
  color: var(--color-primary);
}

.main-nav__list a:hover::after,
.main-nav__list a.is-active::after {
  width: 100%;
}

.has-dropdown > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.has-dropdown > a::before {
  content: "";
  border: solid currentColor;
  border-width: 0 2px 2px 0;
  display: inline-block;
  width: 5px;
  height: 5px;
  transform: rotate(45deg);
  margin-top: -2px;
  transition: transform var(--transition-base);
}

.has-dropdown.is-open > a::before {
  transform: rotate(-135deg);
}

.dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translate(-50%, 8px);
  min-width: 240px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lift);
  padding: var(--space-2);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: 10;
}

.has-dropdown.is-open .dropdown,
.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.dropdown li a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  white-space: nowrap;
}

.dropdown li a::after { display: none; }

.dropdown li a:hover {
  background: var(--color-bg-deep);
  color: var(--color-primary);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 26px;
  height: 3px;
  background: var(--color-secondary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

@media (max-width: 960px) {
  .nav-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    height: calc(100vh - var(--header-h));
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-5) var(--space-4);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    z-index: 999;
  }

  .main-nav.is-open {
    transform: translateX(0);
  }

  .main-nav__list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: var(--space-2);
  }

  .main-nav__list > li { width: 100%; }

  .dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    background: var(--color-bg-alt);
    display: none;
    min-width: 0;
    width: 100%;
    margin-top: var(--space-2);
  }

  .has-dropdown.is-open .dropdown {
    display: block;
    transform: none;
  }
  .has-dropdown:hover .dropdown { display: none; }
  .has-dropdown.is-open:hover .dropdown { display: block; }

  .header-cta .btn--outline { display: none; }
}

/* ====== Hero ====== */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + var(--space-1));
  padding-bottom: var(--space-6);
  isolation: isolate;
}

.hero__grid {
  max-width: 1480px;
  margin: 0 auto;
}

.hero__copy {
  max-width: 560px;
}

.hero__title {
  margin-bottom: var(--space-3);
}

.hero__title .accent {
  color: var(--color-primary);
}

.hero__desc {
  font-size: 1.1rem;
  max-width: 480px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-5);
}

.hero__trust {
  display: flex;
  gap: var(--space-5);
}

.hero__trust strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-secondary);
}

.hero__trust span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.hero__banner-fallback {
  display: none;
}

/* Ảnh nền banner chỉ áp dụng khi đủ rộng để vùng chữ (trái) và vùng
   minh họa (phải) cùng hiển thị rõ ràng; dưới ngưỡng này ảnh sẽ tràn/
   cắt mất vùng nền nhạt khiến chữ đè lên hình bận rộn nên dùng layout
   xếp chồng (text trên, ảnh dưới) thay thế. */
@media (min-width: 1280px) {
  .hero {
    min-height: 620px;
    display: flex;
    top: 110px;
    margin-bottom: 110px;
    align-items: center;
    background-image: url("../images/banner_bg_hrewards.png");
    background-repeat: no-repeat;
    background-position: center right;
    background-size: cover;
  }
}

@media (max-width: 1279px) {
  .hero {
    background: var(--color-bg);
  }

  .hero__banner-fallback {
    display: block;
    width: 100%;
    margin-bottom: var(--space-5);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lift);
  }
}

@media (max-width: 767px) {
  .hero__copy {
    max-width: none;
    text-align: center;
  }

  .hero__desc { margin-inline: auto; }
  .hero__actions, .hero__trust { justify-content: center; }
}

/* ====== Stats strip ====== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.stat-card {
  text-align: center;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-2);}
  .stat-card {
    padding: var(--space-2);
  }
  .footer__grid {
    gap: var(--space-3) !important;
  }
  .site-footer {
    padding: var(--space-4) 0 var(--space-4) !important;
  }
  .hero {
        padding-bottom: var(--space-2) !important;
  }
  .steps__visual img {
    max-width: 330px !important;
  }
  .showcase__media img {
    flex: 1 1 0 !important;
    width: auto !important;
    min-width: 0 !important;
    max-width: 260px !important;
  }
  .showcase__media img:nth-child(2) {
    margin-top: 0 !important;
  }
}

/* ====== Feature grid ====== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lift);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.feature-card h3 { margin-bottom: var(--space-2); }
.feature-card p { margin-bottom: 0; }

@media (max-width: 960px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ====== Showcase (zig-zag with real screenshots) ====== */
.showcase {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.showcase__row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: var(--space-6);
}

.showcase__row--reverse {
  grid-template-columns: 1.1fr 0.9fr;
}

.showcase__row--reverse .showcase__media { order: 2; }
.showcase__row--reverse .showcase__text { order: 1; }

.showcase__media {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: var(--space-3);
  position: relative;
  min-width: 0;
}

.showcase__media img {
  width: 180px;
  border-radius: 24px;
  box-shadow: var(--shadow-lift);
  border: 6px solid var(--color-white);
}

.showcase__media img:nth-child(2) {
  margin-top: var(--space-5);
}

.showcase__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

@media (max-width: 860px) {
  .showcase__row,
  .showcase__row--reverse {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .showcase__row--reverse .showcase__media,
  .showcase__row--reverse .showcase__text {
    order: initial;
  }
}

/* ====== Steps (how it works) ====== */
.steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}

.steps__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.step-item {
  display: flex;
  gap: var(--space-3);
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-card);
}

.step-item__num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-item h3 { margin-bottom: 4px; }
.step-item p { margin-bottom: 0; }

.steps__visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.steps__visual img {
  max-width: 360px;
  border-radius: var(--radius-lg);
}

@media (max-width: 860px) {
  .steps { grid-template-columns: 1fr; }
  .steps__visual { order: -1; }
}

/* ====== Membership tiers ====== */
.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.tier-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  box-shadow: var(--shadow-card);
  border-top: 6px solid var(--tier-color, var(--color-primary));
  transition: transform var(--transition-base);
}

.tier-card:hover { transform: translateY(-8px); }

.tier-card--silver { --tier-color: var(--color-silver); }
.tier-card--gold { --tier-color: var(--color-gold); }
.tier-card--platinum { --tier-color: var(--color-platinum); }

.tier-card__badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--tier-color, var(--color-primary));
  margin-bottom: var(--space-2);
}

.tier-card ul {
  list-style: none;
  text-align: left;
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.tier-card ul li {
  padding-left: 26px;
  position: relative;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.tier-card ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--tier-color, var(--color-primary));
  font-weight: 800;
}

@media (max-width: 860px) {
  .tiers { grid-template-columns: 1fr; }
}

/* ====== Points table ====== */
.points-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.points-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  min-width: 560px;
}

.points-table th,
.points-table td {
  padding: var(--space-3);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.points-table thead th {
  background: var(--color-secondary);
  color: var(--color-white);
  font-family: var(--font-heading);
}

.points-table tbody tr:last-child td { border-bottom: none; }
.points-table tbody tr:hover { background: var(--color-bg-deep); }

/* ====== Accordion ====== */
.accordion-item {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--space-2);
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: none;
  border: none;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-secondary);
  cursor: pointer;
  text-align: left;
}

.accordion-trigger::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-primary);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.accordion-item.is-open .accordion-trigger::after {
  transform: rotate(45deg);
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion-panel__inner {
  padding: 0 var(--space-4) var(--space-4);
  color: var(--color-text-muted);
}

/* ====== CTA band ====== */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band h2,
.cta-band p { color: var(--color-white); }

.cta-band .btn--outline {
  background: var(--color-white);
}

.cta-band__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

/* ====== Footer ====== */
.site-footer {
  background: var(--color-secondary);
  color: #d7daf2;
  padding: var(--space-6) 0 var(--space-4);
}

.site-footer h4 {color: #ffffff;}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-5);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.footer__brand img { height: 58px; }

.footer__tagline { color: #c3c8e8; }

.accordion-list {
  max-width: 780px;
  margin: 0 auto;
}

.footer h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--space-3);
}

.footer__links { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.footer__links a { color: #c3c8e8; transition: color var(--transition-base); }
.footer__links a:hover { color: var(--color-accent-light); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  text-align: center;
  font-size: 0.85rem;
  color: #9aa0cb;
}

@media (max-width: 860px) {
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 540px) {
  .footer__grid { grid-template-columns: 1fr; }
}

/* ====== Page banner (sub pages) ====== */
.page-banner {
  padding-top: calc(var(--header-h) + var(--space-5));
  padding-bottom: var(--space-5);
  text-align: center;
}

.page-banner img {
  margin: var(--space-4) auto 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift);
  max-width: min(880px, 100%);
}

/* ====== Policy page (anchored TOC) ====== */
.policy-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-6);
  align-items: start;
}

.policy-toc {
  position: sticky;
  top: calc(var(--header-h) + var(--space-3));
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-card);
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.policy-toc a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.policy-toc a:hover,
.policy-toc a.is-active {
  background: var(--color-bg-deep);
  color: var(--color-primary);
}

.policy-content section {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--space-4);
}

.policy-content h2 {
  scroll-margin-top: calc(var(--header-h) + var(--space-3));
}

.policy-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-3) 0;
}

.policy-content table th,
.policy-content table td {
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  text-align: left;
  font-size: 0.92rem;
}

.policy-content table th { background: var(--color-bg-deep); }

@media (max-width: 900px) {
  .policy-layout { grid-template-columns: 1fr; }
  .policy-layout > aside { min-width: 0; }
  .policy-toc {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    white-space: nowrap;
    min-width: 0;
  }
}