/* =============================================================
   HOANGTHI TECH — Shared Stylesheet
   ============================================================= */

:root {
  --red: #E30613;
  --red-deep: #B5000F;
  --red-soft: #FFE9EB;
  --ink: #15110F;
  --ink-2: #3A332F;
  --ink-3: #6B6361;
  --line: #ECE6E2;
  --paper: #FFFDFB;
  --paper-warm: #FAF4EE;
  --max: 1280px;
  --radius: 4px;
  --radius-lg: 18px;
  --shadow-card: 0 1px 0 rgba(21, 17, 15, 0.04), 0 12px 32px -16px rgba(21, 17, 15, 0.18);
  --hex: polygon(25% 6%, 75% 6%, 100% 50%, 75% 94%, 25% 94%, 0% 50%);
  --serif: "Be Vietnam Pro", "Inter", system-ui, sans-serif;
  --display: "Space Grotesk", "Be Vietnam Pro", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* -------- Layout helpers -------- */

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--red);
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}

p { text-wrap: pretty; }

/* =============================================================
   TOP BAR (announcement)
   ============================================================= */
.topbar {
  background: var(--ink);
  color: #fff;
  font-size: 13px;
  padding: 9px 0;
}
.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.topbar a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  opacity: 0.9;
}
.topbar a:hover { opacity: 1; }
.topbar .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #4ade80; box-shadow: 0 0 0 4px rgba(74,222,128,0.18);
}
.topbar-right {
  display: flex; align-items: center; gap: 22px;
}

/* =============================================================
   NAVIGATION
   ============================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,253,251,0.85);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 18px;
}
.brand img { width: 38px; height: 38px; object-fit: contain; }
.brand-text { line-height: 1; }
.brand-text small {
  display: block;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  margin-top: 4px;
  text-transform: uppercase;
}

.nav-links {
  display: flex; align-items: center; gap: 6px;
}
.nav-links a {
  padding: 9px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: 999px;
  transition: background 0.2s, color 0.2s;
}
.nav-links a:hover { background: var(--paper-warm); color: var(--ink); }
.nav-links a.active { color: var(--red); }

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

/* Language switcher */
.lang {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  background: #fff;
}
.lang button {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 5px 11px;
  border-radius: 999px;
  color: var(--ink-3);
}
.lang button.on { background: var(--ink); color: #fff; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: 999px;
  font-family: var(--display);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--red);
  color: #fff;
  box-shadow: 0 8px 22px -10px rgba(227, 6, 19, 0.45);
}
.btn-primary:hover { background: var(--red-deep); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--ink-2);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn svg { width: 13px; height: 13px; opacity: 0.9; }

/* Mobile burger */
.burger { display: none; }

/* Mobile sidebar overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(21,17,15,0.5);
  z-index: 98;
  opacity: 0;
  transition: opacity 0.3s;
}
.nav-overlay.open { display: block; opacity: 1; }

@media (max-width: 980px) {
  /* Sidebar: always rendered but off-screen */
  .nav-links {
    position: fixed !important;
    top: 0 !important;
    right: -300px !important;
    width: 280px !important;
    height: 100vh !important;
    background: #fff !important;
    z-index: 100 !important;
    padding: 72px 28px 40px !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 0 !important;
    align-items: flex-start !important;
    box-shadow: -8px 0 30px rgba(0,0,0,0.15) !important;
    transition: right 0.3s ease !important;
    overflow-y: auto !important;
    pointer-events: none;
  }
  .nav-links.open {
    right: 0 !important;
    pointer-events: all !important;
  }
  .nav-links a {
    width: 100% !important;
    padding: 15px 0 !important;
    font-size: 17px !important;
    border-bottom: 1px solid var(--line) !important;
    border-radius: 0 !important;
    color: var(--ink) !important;
    display: block !important;
    pointer-events: all;
  }
  .nav-links a:last-child { border-bottom: none !important; }
  .nav-links a.active { color: var(--red) !important; }

  .burger {
    display: inline-grid !important;
    place-items: center;
    width: 40px; height: 40px;
    border: 1px solid var(--line); border-radius: 10px;
    z-index: 101;
    position: relative;
    flex-direction: column;
    gap: 4px;
    padding: 10px;
  }
  .burger span {
    width: 18px; height: 1.5px;
    background: var(--ink);
    display: block;
    transition: transform 0.3s, opacity 0.3s;
  }
  .burger.open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .burger.open span:nth-child(2) { opacity: 0; }
  .burger.open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
}

  .burger {
    display: inline-grid; place-items: center;
    width: 40px; height: 40px;
    border: 1px solid var(--line); border-radius: 10px;
    position: relative; z-index: 101;
  }
  .burger span {
    width: 18px; height: 1.5px; background: var(--ink); display: block;
    transition: transform 0.3s, opacity 0.3s;
  }
  .burger.open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  .burger.open span:nth-child(2) { opacity: 0; }
  .burger.open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

  /* Close button inside sidebar */
  .nav-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px; height: 36px;
    background: var(--paper-warm);
    border: none;
    border-radius: 10px;
    display: grid; place-items: center;
    cursor: pointer;
    font-size: 20px;
    color: var(--ink);
    z-index: 102;
  }
}

/* =============================================================
   HERO (Home)
   ============================================================= */
.hero {
  position: relative;
  padding: 80px 0 110px;
  overflow: hidden;
  background: linear-gradient(135deg, #fff 0%, #fff 55%, rgba(227,6,19,0.06) 75%, rgba(227,6,19,0.13) 100%);
}
.hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(227,6,19,0.10) 0%, rgba(227,6,19,0.04) 50%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(48px, 6vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin-top: 24px;
}
.hero h1 .red { color: var(--red); }
.hero h1 em {
  font-style: italic;
  font-family: "Space Grotesk", serif;
  font-weight: 400;
}
.hero-lead {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 28px 0 36px;
  max-width: 52ch;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.hero-stats .num {
  font-family: var(--display);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
}
.hero-stats .num em {
  color: var(--red);
  font-style: normal;
}
.hero-stats .label {
  font-size: 13px;
  color: var(--ink-3);
  margin-top: 8px;
}

/* =============================================================
   HERO VISUAL — Laptop with growth dashboard
   ============================================================= */
.hero-visual {
  position: relative;
  padding: 30px 10px 50px;
}
.laptop {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 11;
  filter: drop-shadow(0 30px 50px rgba(21,17,15,0.18));
}
.laptop-screen {
  position: relative;
  width: 100%;
  height: 92%;
  background: #15110F;
  border-radius: 14px 14px 4px 4px;
  border: 2px solid #2a2522;
  padding: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.dash-top {
  height: 22px;
  background: #0e0b09;
  border-radius: 6px 6px 0 0;
  display: flex;
  align-items: center;
  padding: 0 10px;
}
.dash-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
}
.dash-brand .dot {
  width: 8px; height: 8px; border-radius: 50%;
}
.dash-brand .dot.r { background: #FF5F57; }
.dash-brand .dot.y { background: #FEBC2E; }
.dash-brand .dot.g { background: #28C840; }
.dash-brand .dash-url {
  margin-left: 14px;
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.45);
}
.dash-body {
  flex: 1;
  background: linear-gradient(165deg, #1a1411 0%, #15110F 60%, #1f0608 100%);
  border-radius: 0 0 6px 6px;
  padding: 18px 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.dash-body::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 0%, rgba(227,6,19,0.18) 0, transparent 50%),
    repeating-linear-gradient(135deg, rgba(255,255,255,0.02) 0 1px, transparent 1px 16px);
  pointer-events: none;
}
.dash-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
}
.dash-eyebrow {
  font-family: var(--display);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  color: rgba(255,255,255,0.45);
  font-weight: 600;
}
.dash-title {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 4px;
}
.dash-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  background: rgba(74,222,128,0.12);
  color: #4ade80;
  border-radius: 999px;
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.dash-pill .up { font-size: 9px; }
.dash-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  position: relative;
}
.dash-stats .kpi {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  padding: 9px 11px;
}
.dash-stats .kpi .lbl {
  font-family: var(--display);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: rgba(255,255,255,0.45);
  font-weight: 600;
}
.dash-stats .kpi .val {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 700;
  margin-top: 3px;
  letter-spacing: -0.01em;
}
.dash-chart {
  flex: 1;
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding-bottom: 14px;
  min-height: 80px;
}
.dash-chart span {
  flex: 1;
  background: linear-gradient(to top, rgba(227,6,19,0.4), rgba(227,6,19,0.85));
  border-radius: 2px 2px 0 0;
  min-height: 8%;
  transition: opacity 0.2s;
}
.dash-chart span.now {
  background: linear-gradient(to top, #FF6A75, #fff);
  box-shadow: 0 0 14px rgba(255,255,255,0.4);
}
.dash-line {
  position: absolute;
  inset: 0 0 14px 0;
  width: 100%;
  height: calc(100% - 14px);
  pointer-events: none;
  opacity: 0.85;
}
.dash-axis {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex;
  justify-content: space-between;
  font-family: var(--display);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.35);
  padding: 0 4px;
}

.laptop-hinge {
  position: absolute;
  left: -3%;
  right: -3%;
  bottom: 6%;
  height: 6px;
  background: linear-gradient(to bottom, #2a2522, #1a1612);
  border-radius: 0 0 4px 4px;
}
.laptop-base {
  position: absolute;
  left: -5%;
  right: -5%;
  bottom: 0;
  height: 4%;
  background: linear-gradient(to bottom, #d8d0ca 0%, #b9aea6 100%);
  border-radius: 0 0 14px 14px;
  display: grid;
  place-items: center;
}
.laptop-pad {
  width: 18%;
  height: 30%;
  background: rgba(0,0,0,0.12);
  border-radius: 0 0 6px 6px;
}

/* Floating accent badges */
.float-badge {
  position: absolute;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: 0 18px 38px -14px rgba(21,17,15,0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  z-index: 2;
}
.float-badge.fb-tl {
  top: 6%;
  left: -8%;
}
.float-badge.fb-br {
  bottom: 12%;
  right: -10%;
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.float-badge .fb-icon {
  width: 32px; height: 32px;
  background: var(--red);
  color: #fff;
  border-radius: 8px;
  display: grid; place-items: center;
  font-size: 16px;
  font-weight: 700;
}
.float-badge .fb-num {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--red);
}
.float-badge.fb-br .fb-num { color: #fff; font-size: 13px; }
.float-badge .fb-num.small { font-size: 13px; }
.float-badge .fb-sub {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 2px;
  font-weight: 600;
}
.float-badge.fb-br .fb-sub { color: rgba(255,255,255,0.55); }

.hero-marquee {
  margin-top: 70px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  display: flex;
  align-items: center;
  gap: 56px;
  overflow: hidden;
}
.hero-marquee .item {
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}
.hero-marquee .item::before {
  content: "✦";
  color: var(--red);
  margin-right: 22px;
}

/* =============================================================
   SECTION — generic
   ============================================================= */
section { padding: 100px 0; }
section.tight { padding: 70px 0; }

.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: end;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.03em;
}
.section-head p {
  color: var(--ink-2);
  font-size: 17px;
  max-width: 48ch;
}

/* =============================================================
   SERVICES CARDS
   ============================================================= */
.services {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.service {
  background: #fff;
  padding: 36px 28px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 340px;
  transition: background 0.25s;
}
.service:hover { background: var(--paper-warm); }
.service .num {
  font-family: var(--display);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
}
.service h3 {
  font-size: 24px;
  margin: 16px 0 12px;
  line-height: 1.1;
}
.service p {
  color: var(--ink-3);
  font-size: 14px;
  flex: 1;
}
.service .arrow {
  margin-top: 24px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--display);
  font-size: 12px;
  font-weight: 600;
  color: var(--red);
  letter-spacing: 0.05em;
}
.service .arrow svg {
  width: 14px !important;
  height: 14px !important;
  transition: transform 0.2s;
}
.service:hover .arrow svg { transform: translateX(4px); }

.service .icon {
  width: 56px; height: 56px;
  background: var(--paper-warm);
  clip-path: var(--hex);
  display: grid; place-items: center;
  color: var(--red);
}
.service:hover .icon { background: #fff; }
.service .icon svg { width: 24px; height: 24px; }

/* =============================================================
   WHY US (alternating)
   ============================================================= */
.why {
  background: var(--ink);
  color: #fff;
  padding: 110px 0;
}
.why .eyebrow { color: #FF6A75; }
.why h2 { color: #fff; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  margin-top: 56px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.why-item {
  background: var(--ink);
  padding: 40px 32px;
}
.why-item .big {
  font-family: var(--display);
  font-size: 64px;
  font-weight: 600;
  color: var(--red);
  letter-spacing: -0.05em;
  line-height: 1;
}
.why-item h3 {
  font-size: 20px;
  margin: 18px 0 10px;
  color: #fff;
}
.why-item p {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
}

/* =============================================================
   PROCESS / TIMELINE
   ============================================================= */
.process {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 80px;
}
.process-steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step .id {
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--red);
  padding-top: 4px;
}
.step h3 {
  font-size: 22px;
  margin: 0 0 8px;
}
.step p { color: var(--ink-3); font-size: 14px; margin: 0; }

/* =============================================================
   CTA BAND
   ============================================================= */
.cta-band {
  background: linear-gradient(135deg, var(--red) 0%, var(--red-deep) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  right: -60px; top: -60px;
  width: 280px; height: 280px;
  clip-path: var(--hex);
  background: rgba(255,255,255,0.07);
}
.cta-band h2 {
  font-size: clamp(32px, 3.6vw, 48px);
  color: #fff;
  line-height: 1.02;
}
.cta-band p { color: rgba(255,255,255,0.85); margin: 16px 0 0; }
.cta-band .actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
.cta-band .btn-primary { background: #fff; color: var(--red); box-shadow: none; }
.cta-band .btn-primary:hover { background: var(--ink); color: #fff; }
.cta-band .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.5); }
.cta-band .btn-ghost:hover { background: #fff; color: var(--red); }

/* =============================================================
   FOOTER
   ============================================================= */
footer {
  background: var(--ink);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 32px;
  font-size: 14px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}
footer h4 {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 18px;
  font-weight: 600;
}
footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
footer ul a:hover { color: #fff; }
footer .brand img { width: 40px; height: 40px; }
footer .brand { color: #fff; margin-bottom: 18px; }
footer .desc { max-width: 32ch; color: rgba(255,255,255,0.55); margin-bottom: 18px; }
footer .zalo-card {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  color: #fff;
}
footer .zalo-card .icon {
  width: 36px; height: 36px;
  background: #0068FF;
  border-radius: 8px;
  display: grid; place-items: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 13px;
  color: #fff;
}
footer .zalo-card .num {
  font-family: var(--display);
  font-weight: 600;
  color: #fff;
}
footer .zalo-card small {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.foot-bottom {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255,255,255,0.45);
  font-size: 12px;
  letter-spacing: 0.05em;
}

/* =============================================================
   FLOATING ZALO BUTTON
   ============================================================= */
.zalo-float {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px 12px 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 18px 38px -12px rgba(21,17,15,0.25);
  font-family: var(--display);
  font-weight: 600;
  font-size: 13px;
  color: var(--ink);
  transition: transform 0.2s;
}
.zalo-float:hover { transform: translateY(-2px); }
.zalo-float .b {
  width: 36px; height: 36px;
  background: #0068FF;
  border-radius: 50%;
  display: grid; place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.zalo-float .ping {
  position: absolute;
  width: 36px; height: 36px;
  left: 12px;
  border-radius: 50%;
  background: #0068FF;
  opacity: 0.4;
  animation: ping 1.8s ease-out infinite;
}
@keyframes ping {
  0% { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(1.8); opacity: 0; }
}

/* =============================================================
   PRODUCT / SERVICES PAGE
   ============================================================= */
.page-hero {
  padding: 70px 0 60px;
  border-bottom: 1px solid var(--line);
}
.page-hero h1 {
  font-size: clamp(48px, 6vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin: 18px 0 24px;
}
.page-hero p {
  font-size: 18px;
  color: var(--ink-2);
  max-width: 58ch;
}

.bigservice {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  padding: 90px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.bigservice:nth-child(even) > div:first-child { order: 2; }
.bigservice .meta .num {
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--red);
}
.bigservice .meta h2 {
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.02;
  margin: 18px 0 22px;
}
.bigservice .meta > p {
  color: var(--ink-2);
  font-size: 17px;
  margin-bottom: 28px;
}
.bigservice .features {
  display: grid;
  gap: 14px;
}
.bigservice .feature {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  align-items: start;
}
.bigservice .feature .check {
  width: 22px; height: 22px;
  background: var(--red-soft);
  color: var(--red);
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 700;
  margin-top: 2px;
}
.bigservice .feature p { margin: 0; font-size: 14px; color: var(--ink-2); }

.bigservice .visual {
  position: relative;
  background: var(--paper-warm);
  border-radius: var(--radius-lg);
  aspect-ratio: 5/4;
  overflow: hidden;
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.pricelist {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.price {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  background: #fff;
  display: flex;
  flex-direction: column;
}
.price.featured {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.price h3 {
  font-size: 18px;
  margin: 0 0 8px;
}
.price .price-amt {
  font-family: var(--display);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 18px 0 6px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px;
}
.price.featured .price-amt { color: #fff; }
.price .price-amt small {
  font-size: 14px;
  color: var(--ink-3);
  font-weight: 500;
  letter-spacing: 0;
}
.price.featured small { color: rgba(255,255,255,0.6); }
.price .pdesc { color: var(--ink-3); font-size: 13px; }
.price.featured .pdesc { color: rgba(255,255,255,0.6); }
.price ul {
  list-style: none; padding: 22px 0 28px; margin: 0;
  display: flex; flex-direction: column; gap: 10px;
  border-top: 1px solid var(--line);
  margin-top: 22px;
  font-size: 14px;
}
.price.featured ul { border-color: rgba(255,255,255,0.12); color: rgba(255,255,255,0.85); }
.price ul li::before { content: "→"; color: var(--red); margin-right: 10px; font-weight: 700; }
.price.featured ul li::before { color: #FF6A75; }
.price .btn { justify-content: center; margin-top: auto; }

/* =============================================================
   INDUSTRIES (Phù hợp cho ngành)
   ============================================================= */
.industries {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 48px;
}
.industry {
  background: #fff;
  padding: 28px 24px 26px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 180px;
  transition: background 0.25s;
}
.industry:hover { background: var(--paper-warm); }
.industry .ind-icon {
  width: 44px; height: 44px;
  background: var(--red-soft);
  color: var(--red);
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.industry .ind-icon svg { width: 22px; height: 22px; }
.industry h3 {
  font-size: 17px;
  margin: 0 0 6px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.industry p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.5;
}
.industry.spotlight {
  background: var(--ink);
  color: #fff;
}
.industry.spotlight h3 { color: #fff; }
.industry.spotlight p { color: rgba(255,255,255,0.65); }
.industry.spotlight .ind-icon { background: rgba(255,255,255,0.08); color: #FF6A75; }

/* =============================================================
   DEMO PAGE (coming soon)
   ============================================================= */
.demo-empty {
  padding: 100px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.demo-empty h1 {
  font-size: clamp(42px, 5vw, 72px);
  line-height: 1;
  margin: 20px 0 24px;
}
.demo-empty p {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 50ch;
}
.demo-visual {
  position: relative;
  aspect-ratio: 1/1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
}
.demo-tile {
  background: var(--paper-warm);
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
  border: 1px dashed #D6CFC9;
  position: relative;
}
.demo-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: repeating-linear-gradient(135deg, transparent 0 10px, rgba(214,207,201,0.4) 10px 11px);
  pointer-events: none;
}
.demo-tile span { position: relative; }
.demo-tile.t-red {
  background: var(--red);
  color: #fff;
  border: none;
}
.demo-tile.t-red::after {
  background: repeating-linear-gradient(135deg, transparent 0 10px, rgba(255,255,255,0.08) 10px 11px);
}

.tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: var(--paper-warm);
  border-radius: 999px;
  margin: 32px 0 24px;
}
.tabs button {
  padding: 9px 18px;
  font-family: var(--display);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.tabs button.on {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06), 0 6px 16px -8px rgba(0,0,0,0.15);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.demo-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.demo-card .ph {
  aspect-ratio: 16/10;
  background: var(--paper-warm);
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(135deg, transparent 0 12px, rgba(21,17,15,0.04) 12px 13px);
  display: grid;
  place-items: center;
  color: var(--ink-3);
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.demo-card .body { padding: 22px 24px 24px; }
.demo-card h3 { font-size: 18px; margin: 0 0 6px; }
.demo-card .cat { font-family: var(--display); font-size: 11px; letter-spacing: 0.2em; color: var(--red); text-transform: uppercase; }

/* =============================================================
   ABOUT PAGE
   ============================================================= */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 100px 0;
  align-items: center;
}
.about-intro .visual {
  aspect-ratio: 4/5;
  background: linear-gradient(160deg, var(--red) 0%, var(--red-deep) 100%);
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.about-intro .visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.05) 0 1px, transparent 1px 18px);
}
.about-intro .visual .stamp {
  position: relative;
  font-family: var(--display);
  text-align: center;
}
.about-intro .visual .stamp .y {
  font-size: 140px;
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.05em;
}
.about-intro .visual .stamp .l {
  font-size: 13px;
  letter-spacing: 0.3em;
  opacity: 0.85;
  margin-top: 8px;
}
.about-intro h2 {
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.04;
  margin: 20px 0 24px;
}
.about-intro .lead {
  font-size: 18px;
  color: var(--ink-2);
  margin-bottom: 18px;
}
.about-intro p { color: var(--ink-2); }

.values {
  background: var(--paper-warm);
  padding: 110px 0;
}
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.value {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--line);
}
.value .num {
  font-family: var(--display);
  color: var(--red);
  font-size: 14px;
  letter-spacing: 0.18em;
}
.value h3 { font-size: 22px; margin: 14px 0 10px; }
.value p { color: var(--ink-3); font-size: 14px; }

.team {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.member {
  background: var(--paper-warm);
  border-radius: var(--radius-lg);
  padding: 28px;
  aspect-ratio: 3/4;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
  background-image: repeating-linear-gradient(135deg, transparent 0 12px, rgba(21,17,15,0.04) 12px 13px);
}
.member .initials {
  position: absolute;
  top: 28px; left: 28px;
  font-family: var(--display);
  font-size: 56px;
  font-weight: 700;
  color: var(--red);
  letter-spacing: -0.03em;
  line-height: 1;
}
.member h4 { font-family: var(--display); font-size: 18px; color: var(--ink); margin: 0 0 4px; }
.member .role { font-size: 13px; color: var(--ink-3); }

/* =============================================================
   CONTACT PAGE
   ============================================================= */
.contact {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  padding: 100px 0;
}
.contact h1 {
  font-size: clamp(42px, 5vw, 72px);
  line-height: 1;
  margin: 18px 0 24px;
}
.contact .lead {
  font-size: 18px;
  color: var(--ink-2);
  margin-bottom: 40px;
  max-width: 50ch;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  transition: border-color 0.2s, background 0.2s;
}
.contact-card:hover { border-color: var(--red); background: var(--red-soft); }
.contact-card.zalo .ic {
  width: 52px; height: 52px;
  background: #0068FF;
  border-radius: 14px;
  display: grid; place-items: center;
  color: #fff; font-family: var(--display); font-weight: 700;
}
.contact-card.email .ic {
  width: 52px; height: 52px;
  background: var(--ink);
  border-radius: 14px;
  display: grid; place-items: center;
  color: #fff;
}
.contact-card.email .ic svg { width: 22px; height: 22px; }
.contact-card .info small {
  display: block;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 2px;
}
.contact-card .info .big {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 36px 32px;
  box-shadow: var(--shadow-card);
}
.form-card h3 { font-size: 22px; margin: 0 0 6px; }
.form-card .lead { color: var(--ink-3); font-size: 14px; margin-bottom: 24px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
}
.field input, .field select, .field textarea {
  font-family: inherit;
  font-size: 15px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 10px;
  padding: 13px 14px;
  color: var(--ink);
  transition: border-color 0.2s, background 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--red);
  background: #fff;
}
.field textarea { min-height: 110px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 980px) {
  .wrap { padding: 0 20px; }
  .hero-grid, .section-head, .process, .bigservice,
  .demo-empty, .about-intro, .contact, .cta-band {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .cta-band { padding: 40px 28px; }
  .cta-band .actions { justify-content: flex-start; }
  .services { grid-template-columns: repeat(2, 1fr); }
  .industries { grid-template-columns: repeat(2, 1fr); }
  .why-grid, .values-grid { grid-template-columns: 1fr; }
  .team, .demo-grid, .pricelist { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 70px 0; }
  .hero { padding: 50px 0 80px; }
  .bigservice:nth-child(even) > div:first-child { order: 0; }
  .hero-visual { padding: 20px 30px 60px; }
  .float-badge.fb-tl { left: -2%; }
  .float-badge.fb-br { right: -2%; }
}

@media (max-width: 600px) {
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .team, .demo-grid, .pricelist { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .services { grid-template-columns: 1fr; }
  .topbar { font-size: 12px; }
  .topbar .hide-sm { display: none; }
}