@import url('tokens.css');
@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@500;700&display=swap');

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--ink);
  background-color: var(--bg-page);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
}

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* --- Container & Grids --- */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media (min-width: 1400px) {
  .container {
    max-width: 1380px;
  }
}

/* --- Badges & Pills --- */
.dhte-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-btn);
  background: var(--b-100);
  color: var(--b-700);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--b-200);
}

.dhte-badge.is-red {
  background: var(--red-light);
  color: var(--red);
  border-color: #ffd2d2;
}

.dhte-badge.is-dark {
  background: var(--b-900);
  color: #fff;
  border-color: var(--b-800);
}

/* --- Buttons --- */
.dhte-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: var(--radius-btn);
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  text-decoration: none;
}

.dhte-btn:active {
  transform: translateY(2px);
}

.dhte-btn-red {
  background: var(--red);
  color: #fff;
  box-shadow: 0 4px 14px rgba(225, 29, 46, 0.35), 0 3px 0 #b31414;
}

.dhte-btn-red:hover {
  background: var(--red-hover);
  box-shadow: 0 6px 20px rgba(225, 29, 46, 0.45), 0 3px 0 #991010;
}

.dhte-btn-blue {
  background: var(--b-600);
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 111, 212, 0.35), 0 3px 0 var(--b-800);
}

.dhte-btn-blue:hover {
  background: var(--b-700);
}

.dhte-btn-ghost {
  background: #fff;
  color: var(--b-700);
  border: 1.5px solid var(--b-300);
  box-shadow: 0 3px 0 var(--b-200);
}

.dhte-btn-ghost:hover {
  background: var(--b-50);
  border-color: var(--b-400);
}

/* --- Section Typography --- */
.dhte-sec-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px;
}

.dhte-sec-head .dhte-badge {
  margin-bottom: 14px;
}

.dhte-sec-title {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--ink);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.dhte-sec-desc {
  font-size: 1.05rem;
  line-height: 1.68;
  color: var(--ink-75);
}

/* ============================================================
   SECTION 1: NAVBAR
   ============================================================ */
.dhte-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(13, 33, 73, 0.04);
}

.dhte-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  gap: 20px;
}

.dhte-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.dhte-logo-img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: transform 0.18s ease;
}

.dhte-logo:hover .dhte-logo-img {
  transform: scale(1.03);
}

.dhte-nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.dhte-nav-links a {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink-75);
  transition: color 0.18s ease;
  position: relative;
  padding: 6px 0;
}

.dhte-nav-links a:hover {
  color: var(--red);
}

.dhte-nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.dhte-burger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--ink);
  cursor: pointer;
  padding: 8px;
}

/* ============================================================
   SECTION 2: HERO BANNER
   ============================================================ */
.dhte-hero-sec {
  background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
  padding: 56px 0 84px;
  position: relative;
  overflow: hidden;
}

.dhte-hero-sec::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(142, 170, 241, 0.25) 0%, rgba(255, 255, 255, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.dhte-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.dhte-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.dhte-hero-title {
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 18px 0 16px;
}

.dhte-hero-title span.hl {
  color: var(--b-600);
}

.dhte-hero-title span.hl-red {
  color: var(--red);
}

.dhte-hero-lead {
  font-size: 1.08rem;
  line-height: 1.72;
  color: var(--ink-75);
  margin-bottom: 30px;
}

.dhte-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}

.dhte-hero-stats {
  display: flex;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  width: 100%;
}

.dhte-stat-item b {
  display: block;
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--b-700);
  line-height: 1;
}

.dhte-stat-item span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-60);
  margin-top: 4px;
  display: block;
}

/* Mockup Phones Container */
.dhte-hero-showcase {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.dhte-phone-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 540px;
  width: 100%;
}

.dhte-phone {
  background: #ffffff;
  border: 2px solid var(--b-200);
  border-radius: 28px;
  box-shadow: 0 16px 36px -10px rgba(13, 33, 73, 0.22);
  overflow: hidden;
  position: relative;
}

.dhte-phone:nth-child(2) {
  transform: translateY(24px);
}

.dhte-phone-notch {
  width: 90px;
  height: 14px;
  background: #0d2149;
  border-radius: 0 0 10px 10px;
  margin: 0 auto 10px;
}

.dhte-phone-header {
  padding: 10px 14px;
  background: var(--b-50);
  border-bottom: 1px solid var(--b-100);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--b-800);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dhte-phone-video {
  position: relative;
  background: #0f172a;
  aspect-ratio: 16/10;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #fff;
  text-align: center;
  padding: 12px;
}

.dhte-phone-video-title {
  font-size: 0.85rem;
  font-weight: 800;
  margin-bottom: 4px;
  color: #f8fafc;
}

.dhte-phone-video-sub {
  font-size: 0.7rem;
  color: var(--b-200);
}

.dhte-phone-play-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(225, 29, 46, 0.9);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 8px;
  box-shadow: 0 4px 10px rgba(225, 29, 46, 0.4);
}

.dhte-phone-body {
  padding: 14px;
}

.dhte-phone-tag {
  display: inline-block;
  padding: 3px 8px;
  background: var(--b-100);
  color: var(--b-700);
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.dhte-phone-subtitles {
  background: var(--b-50);
  border: 1px solid var(--b-200);
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 12px;
  font-size: 0.76rem;
}

.dhte-sub-en {
  font-weight: 700;
  color: var(--b-900);
  margin-bottom: 3px;
}

.dhte-sub-en span.kw {
  background: #ffeb3b;
  color: #000;
  padding: 0 4px;
  border-radius: 3px;
  cursor: pointer;
}

.dhte-sub-vi {
  font-size: 0.7rem;
  color: var(--ink-60);
}

.dhte-phone-steps-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dhte-pstep-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--b-100);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--ink-75);
}

.dhte-pstep-item.active {
  background: var(--b-600);
  color: #fff;
  border-color: var(--b-600);
}

/* Phone 2: Vocab Card */
.dhte-vocab-card {
  padding: 14px;
}

.dhte-vocab-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: 10px;
  background: var(--b-50);
  border: 1px solid var(--b-100);
  margin-bottom: 8px;
}

.dhte-v-word {
  font-weight: 800;
  font-size: 0.82rem;
  color: var(--b-800);
}

.dhte-v-ipa {
  font-size: 0.68rem;
  color: var(--ink-60);
}

.dhte-v-vi {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink);
}

.dhte-phone-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 10px;
  border-radius: var(--radius-btn);
  background: var(--b-600);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  margin-top: 10px;
  box-shadow: 0 3px 0 var(--b-800);
}

/* ============================================================
   SECTION 3: 3 TRỤ CỘT CHUYÊN NGÀNH
   ============================================================ */
.dhte-pillars-sec {
  padding: 90px 0;
  background: #ffffff;
}

.dhte-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.dhte-pillar-card {
  background: #ffffff;
  border: 1.5px solid var(--b-200);
  border-radius: var(--radius-card);
  padding: 34px 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.dhte-pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--b-400);
}

.dhte-pillar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.dhte-pillar-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--b-100);
  color: var(--b-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  border: 1px solid var(--sky-line);
}

.dhte-pillar-tag {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--radius-btn);
  background: var(--b-50);
  color: var(--b-700);
  border: 1px solid var(--b-200);
}

.dhte-pillar-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.3;
}

.dhte-pillar-desc {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--ink-75);
  margin-bottom: 22px;
}

.dhte-pillar-bullets {
  list-style: none;
  margin-top: auto;
  display: grid;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.dhte-pillar-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--ink-90);
  font-weight: 600;
}

.dhte-pillar-bullets li::before {
  content: '✓';
  color: var(--b-600);
  font-weight: 900;
  font-size: 0.95rem;
}

/* ============================================================
   SECTION 4: QUY TRÌNH 6 BƯỚC HỌC AI
   ============================================================ */
.dhte-flow-sec {
  padding: 90px 0;
  background: var(--b-50);
  border-top: 1px solid var(--b-200);
  border-bottom: 1px solid var(--b-200);
}

.dhte-flow-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.dhte-step-nav {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.dhte-step-item {
  background: #ffffff;
  border: 1.5px solid var(--b-200);
  border-radius: 18px;
  padding: 18px 22px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(13, 33, 73, 0.04);
}

.dhte-step-item:hover {
  border-color: var(--b-400);
  transform: translateX(4px);
}

.dhte-step-item.active {
  border-color: var(--b-600);
  background: #ffffff;
  box-shadow: 6px 6px 0 var(--b-100);
}

.dhte-step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.dhte-step-badge {
  font-size: 0.72rem;
  font-weight: 900;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--b-100);
  color: var(--b-700);
}

.dhte-step-item.active .dhte-step-badge {
  background: var(--red);
  color: #fff;
}

.dhte-step-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
}

.dhte-step-desc {
  font-size: 0.88rem;
  color: var(--ink-75);
  line-height: 1.5;
}

.dhte-flow-display {
  background: #ffffff;
  border: 2px solid var(--b-300);
  border-radius: 26px;
  box-shadow: 10px 10px 0 var(--b-100);
  padding: 32px;
  min-height: 440px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.dhte-flow-showcase-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--b-900);
  margin-bottom: 12px;
}

.dhte-flow-showcase-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-75);
  margin-bottom: 24px;
}

.dhte-flow-interactive-box {
  background: var(--b-50);
  border: 1px solid var(--b-200);
  border-radius: 16px;
  padding: 20px;
}

/* ============================================================
   SECTION 5: BẢNG GIÁ & GÓI HỌC
   ============================================================ */
.dhte-pricing-sec {
  padding: 90px 0;
  background: #ffffff;
}

.dhte-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.dhte-price-card {
  background: #ffffff;
  border: 1.5px solid var(--b-200);
  border-radius: 24px;
  padding: 34px 28px;
  box-shadow: var(--shadow-card);
  position: relative;
  display: flex;
  flex-direction: column;
}

.dhte-price-card.is-best {
  border: 2.5px solid var(--b-600);
  box-shadow: 12px 12px 0 var(--b-100);
}

.dhte-best-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--red);
  color: #fff;
  padding: 4px 16px;
  border-radius: var(--radius-btn);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  white-space: nowrap;
  box-shadow: 0 3px 8px rgba(225, 29, 46, 0.4);
}

.dhte-price-name {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--ink);
  margin-bottom: 6px;
}

.dhte-price-period {
  font-size: 0.84rem;
  color: var(--ink-60);
  font-weight: 600;
  margin-bottom: 20px;
}

.dhte-price-val {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 6px;
}

.dhte-price-val b {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--b-700);
  line-height: 1;
  letter-spacing: -0.03em;
}

.dhte-price-val span {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--b-700);
}

.dhte-price-old {
  font-size: 0.88rem;
  color: var(--ink-40);
  text-decoration: line-through;
  margin-bottom: 16px;
}

.dhte-price-features {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 24px 0 32px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
  flex-grow: 1;
}

.dhte-price-features li {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--ink-90);
  display: flex;
  gap: 10px;
}

.dhte-price-features li::before {
  content: '✓';
  color: var(--b-600);
  font-weight: 900;
}

/* ============================================================
   TRUST BAR
   ============================================================ */
.dhte-trust-bar {
  margin-top: 48px;
  background: var(--b-50);
  border: 1.5px solid var(--b-200);
  border-radius: 20px;
  padding: 24px 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.dhte-trust-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.dhte-trust-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--b-100);
  color: var(--b-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.dhte-trust-info b {
  display: block;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--ink);
}

.dhte-trust-info span {
  font-size: 0.78rem;
  color: var(--ink-60);
}

/* ============================================================
   SECTION 6: LEAD REGISTRATION FORM
   ============================================================ */
.dhte-form-sec {
  padding: 90px 0;
  background: linear-gradient(180deg, #f0f6ff 0%, #ffffff 100%);
}

.dhte-form-wrap {
  max-width: 680px;
  margin: 0 auto;
  background: #ffffff;
  border: 1.5px solid var(--b-200);
  border-radius: 26px;
  box-shadow: 10px 10px 0 var(--b-100);
  padding: 40px;
}

.dhte-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.dhte-form-grid .full {
  grid-column: span 2;
}

.dhte-input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dhte-input-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink);
}

.dhte-input-group input,
.dhte-input-group select {
  padding: 12px 16px;
  border: 1.5px solid var(--b-200);
  border-radius: 12px;
  background: #ffffff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.dhte-input-group input:focus,
.dhte-input-group select:focus {
  border-color: var(--b-600);
  box-shadow: 0 0 0 3px rgba(47, 111, 212, 0.15);
}

.dhte-form-submit {
  margin-top: 24px;
  width: 100%;
}

/* ============================================================
   SECTION 7: FOOTER CHUẨN 100% TỪ DHTE.VN
   ============================================================ */
.dhte-footer {
  background: #0B1528;
  color: #eaf1fb;
  padding: 72px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.dhte-footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 1.1fr 1.5fr;
  gap: 36px;
  margin-bottom: 48px;
}

.dhte-footer-logo-wrap {
  margin-bottom: 18px;
}

.dhte-footer-logo-img {
  height: 38px;
  width: auto;
  display: block;
  object-fit: contain;
}

.dhte-footer-intro {
  font-size: 0.9rem;
  line-height: 1.68;
  color: rgba(234, 241, 251, 0.8);
}

.dhte-footer-col h4 {
  font-size: 0.9rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  letter-spacing: 0.02em;
}

.dhte-footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.dhte-footer-col a {
  font-size: 0.88rem;
  color: rgba(234, 241, 251, 0.76);
  transition: color 0.15s ease;
}

.dhte-footer-col a:hover {
  color: var(--teal);
}

.dhte-company-sub {
  font-size: 0.8rem;
  font-style: italic;
  color: rgba(234, 241, 251, 0.65);
  margin-top: -6px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.dhte-company-details {
  display: grid;
  gap: 12px;
  font-size: 0.86rem;
  line-height: 1.55;
  color: rgba(234, 241, 251, 0.85);
}

.dhte-detail-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.dhte-detail-icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.dhte-detail-row b {
  color: #ffffff;
  font-weight: 700;
}

.dhte-detail-row a {
  color: var(--teal);
  text-decoration: underline;
}

.dhte-footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.82rem;
  color: rgba(234, 241, 251, 0.6);
  letter-spacing: 0.02em;
}

/* ============================================================
   FLOATING QUICK ACTIONS & GO TO TOP
   ============================================================ */
.dhte-floating-actions {
  position: fixed;
  right: 24px;
  bottom: 30px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.dhte-float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  text-decoration: none;
  cursor: pointer;
  border: none;
}

.dhte-float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.dhte-float-phone {
  background: #FF334B;
  box-shadow: 0 6px 18px rgba(255, 51, 75, 0.4);
  animation: pulsePhone 2s infinite;
}

@keyframes pulsePhone {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 51, 75, 0.7);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(255, 51, 75, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 51, 75, 0);
  }
}

.dhte-float-zalo {
  background: #0068FF;
  box-shadow: 0 6px 18px rgba(0, 104, 255, 0.4);
}

.dhte-float-email {
  background: #1E4F9C;
  box-shadow: 0 6px 18px rgba(30, 79, 156, 0.4);
}

.dhte-float-top {
  background: #ffffff;
  color: #0D2149;
  border: 1.5px solid #dbe6f4;
  width: 42px;
  height: 42px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.dhte-float-top.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.dhte-float-tooltip {
  position: absolute;
  right: 58px;
  background: rgba(13, 33, 73, 0.92);
  backdrop-filter: blur(4px);
  color: #ffffff;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  transform: translateX(6px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.dhte-float-btn:hover .dhte-float-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* Modal Popup */
.dhte-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(13, 33, 73, 0.65);
  backdrop-filter: blur(4px);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.dhte-modal-backdrop.active {
  display: flex;
}

.dhte-modal-content {
  background: #ffffff;
  border-radius: 24px;
  max-width: 480px;
  width: 100%;
  padding: 36px 32px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  animation: modalPop 0.25s ease-out;
}

@keyframes modalPop {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* Responsive Breakpoints */
@media (max-width: 1100px) {
  .dhte-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 1024px) {
  .dhte-hero-grid,
  .dhte-flow-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .dhte-pillars-grid,
  .dhte-pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .dhte-trust-bar {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .dhte-nav-links,
  .dhte-nav-actions .dhte-btn {
    display: none;
  }
  
  .dhte-burger {
    display: block;
  }
  
  .dhte-phone-wrap {
    grid-template-columns: 1fr;
  }
  
  .dhte-phone:nth-child(2) {
    transform: none;
  }
  
  .dhte-trust-bar {
    grid-template-columns: 1fr;
  }
  
  .dhte-form-grid {
    grid-template-columns: 1fr;
  }
  
  .dhte-form-grid .full {
    grid-column: span 1;
  }

  .dhte-footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .dhte-floating-actions {
    right: 16px;
    bottom: 20px;
  }
}