/* ============================================================
   WEBSITE VIỆT – HOMEPAGE STYLES
   Design: Hazo + Mikotech + ThuỷThủ inspired
   ============================================================ */

/* ---- RESET & BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Be Vietnam Pro', sans-serif;
  color: #1a1a2e;
  background: #fff;
  line-height: 1.65;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color .25s; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; outline: none; }

/* ---- CSS VARIABLES ---- */
:root {
  --primary:       #2563eb;
  --primary-dark:  #1d4ed8;
  --primary-light: #3b82f6;
  --secondary:     #06b6d4;
  --accent:        #f59e0b;
  --dark:          #0f172a;
  --dark2:         #1e293b;
  --gray:          #64748b;
  --light:         #f1f5f9;
  --white:         #ffffff;
  --gradient:      linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient2:     linear-gradient(135deg, #7c3aed 0%, var(--primary) 60%, var(--secondary) 100%);
  --radius:        16px;
  --radius-sm:     10px;
  --shadow:        0 4px 24px rgba(37,99,235,.12);
  --shadow-lg:     0 12px 48px rgba(37,99,235,.18);
  --transition:    .3s cubic-bezier(.4,0,.2,1);
}

/* ---- CONTAINER ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---- UTILITY ---- */
.section { padding: 96px 0; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-text-light {
  background: linear-gradient(135deg, #93c5fd 0%, #67e8f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-24 { margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 50px; font-weight: 600;
  font-size: .95rem; transition: var(--transition);
  white-space: nowrap; cursor: pointer;
}
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn-primary {
  background: var(--gradient); color: #fff;
  box-shadow: 0 4px 20px rgba(37,99,235,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(37,99,235,.45); }
.btn-outline {
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,.6);
}
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.btn-outline-dark {
  background: transparent; color: var(--dark);
  border: 2px solid rgba(15,23,42,.2);
}
.btn-outline-dark:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline-primary {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline-primary:hover { background: var(--primary); color: #fff; }
.btn-block { width: 100%; justify-content: center; }

/* ---- SECTION HEADER ---- */
.section-header { text-align: center; max-width: 680px; margin: 0 auto 64px; }
.section-tag {
  display: inline-block; padding: 6px 18px; border-radius: 50px;
  background: rgba(37,99,235,.1); color: var(--primary);
  font-size: .82rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; margin-bottom: 16px;
}
.section-tag.light { background: rgba(255,255,255,.15); color: rgba(255,255,255,.9); }
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; line-height: 1.25; margin-bottom: 16px; }
.section-title.light { color: #fff; }
.section-desc { color: var(--gray); font-size: 1.05rem; }
.section-desc.light { color: rgba(255,255,255,.75); }

/* ============================================================
   TOP BAR
   ============================================================ */
.topbar {
  background: var(--dark); color: rgba(255,255,255,.8);
  font-size: .82rem; padding: 8px 0;
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; }
.topbar-left { display: flex; gap: 24px; }
.topbar-left span { display: flex; align-items: center; gap: 6px; }
.topbar-left a { color: rgba(255,255,255,.85); }
.topbar-left i { color: var(--primary-light); }
.topbar-right { display: flex; gap: 12px; }
.topbar-right a {
  width: 26px; height: 26px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.1); color: rgba(255,255,255,.8); font-size: .75rem;
  transition: var(--transition);
}
.topbar-right a:hover { background: var(--primary); color: #fff; }

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: sticky; top: 0; z-index: 999; background: #fff;
  box-shadow: 0 2px 16px rgba(0,0,0,.08);
  transition: var(--transition);
}
.header.scrolled { box-shadow: 0 4px 32px rgba(0,0,0,.12); }
.header-inner { display: flex; align-items: center; padding: 0 24px; height: 68px; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--gradient); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem;
}
.logo-text { font-size: 1.3rem; font-weight: 800; color: var(--dark); }
.logo-text span { color: var(--primary); }
.nav { flex: 1; }
.nav-list { display: flex; gap: 4px; align-items: center; }
.nav-link {
  padding: 8px 14px; border-radius: 8px; font-weight: 600; font-size: .9rem;
  color: var(--dark2); display: flex; align-items: center; gap: 5px;
  transition: var(--transition); position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: rgba(37,99,235,.07); }
.nav-link i { font-size: .7rem; transition: transform .25s; }
.has-dropdown:hover .nav-link i { transform: rotate(180deg); }
.has-dropdown { position: relative; }
.dropdown {
  position: absolute; top: calc(100% + 8px); left: 0;
  background: #fff; border-radius: var(--radius-sm);
  box-shadow: 0 12px 40px rgba(0,0,0,.15);
  min-width: 240px; padding: 8px 0; opacity: 0;
  visibility: hidden; transform: translateY(-8px);
  transition: var(--transition); z-index: 100;
  border: 1px solid rgba(0,0,0,.06);
}
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown li a {
  padding: 10px 20px; display: flex; align-items: center; gap: 12px;
  font-size: .9rem; color: var(--dark2); font-weight: 500;
  transition: var(--transition);
}
.dropdown li a i { color: var(--primary); width: 18px; }
.dropdown li a:hover { background: rgba(37,99,235,.06); color: var(--primary); }
.header-cta { flex-shrink: 0; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.hamburger span { width: 24px; height: 2px; background: var(--dark); border-radius: 2px; transition: var(--transition); display: block; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  background: var(--dark); min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 0 80px;
}
.hero-bg { position: absolute; inset: 0; }
.hero-gradient {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 80% at 70% 50%, rgba(37,99,235,.35) 0%, transparent 70%),
              radial-gradient(ellipse 50% 60% at 20% 80%, rgba(6,182,212,.2) 0%, transparent 60%),
              radial-gradient(ellipse 40% 40% at 85% 15%, rgba(124,58,237,.2) 0%, transparent 60%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-particles { position: absolute; inset: 0; }
.particle {
  position: absolute; border-radius: 50%;
  background: rgba(99,179,237,.4);
  animation: floatParticle linear infinite;
}
@keyframes floatParticle {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: .5; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  width: 100%;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  border-radius: 50px; padding: 8px 18px; color: rgba(255,255,255,.9);
  font-size: .82rem; font-weight: 600; margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero-badge i { color: var(--accent); }
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 900;
  color: #fff; line-height: 1.15; margin-bottom: 24px;
}
.hero-desc { color: rgba(255,255,255,.7); font-size: 1.1rem; margin-bottom: 36px; max-width: 480px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex; align-items: center; gap: 0;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius); padding: 20px 24px;
  backdrop-filter: blur(8px);
}
.hero-stat { text-align: center; flex: 1; }
.stat-number { font-size: 1.8rem; font-weight: 900; color: #fff; }
.stat-plus { font-size: 1.4rem; font-weight: 900; color: var(--secondary); }
.stat-label { display: block; font-size: .75rem; color: rgba(255,255,255,.6); margin-top: 4px; font-weight: 500; }
.hero-stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,.15); flex-shrink: 0; margin: 0 8px; }

/* --- Mockup --- */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-mockup { position: relative; animation: heroFloat 6s ease-in-out infinite; }
@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}
.mockup-browser {
  width: 460px; border-radius: 16px;
  background: #1e293b; border: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 32px 80px rgba(0,0,0,.5);
  overflow: hidden;
}
.mockup-bar {
  background: #0f172a; padding: 12px 16px;
  display: flex; align-items: center; gap: 8px;
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }
.mockup-url {
  flex: 1; background: rgba(255,255,255,.06); border-radius: 6px;
  padding: 4px 12px; font-size: .75rem; color: rgba(255,255,255,.5);
  display: flex; align-items: center; gap: 6px; margin-left: 8px;
}
.mockup-screen { padding: 16px; }
.ms-header { height: 32px; background: rgba(37,99,235,.3); border-radius: 6px; margin-bottom: 12px; }
.ms-hero { display: flex; gap: 12px; margin-bottom: 16px; }
.ms-hero-text { flex: 1; display: flex; flex-direction: column; gap: 8px; justify-content: center; }
.ms-bar { height: 12px; background: rgba(255,255,255,.15); border-radius: 4px; }
.ms-bar.w80 { width: 80%; }
.ms-bar.w60 { width: 60%; }
.ms-btn { height: 28px; width: 100px; background: var(--gradient); border-radius: 20px; margin-top: 4px; }
.ms-hero-img { width: 120px; height: 80px; background: rgba(37,99,235,.25); border-radius: 8px; flex-shrink: 0; }
.ms-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.ms-card { height: 60px; border-radius: 8px; }
.ms-card.c1 { background: rgba(37,99,235,.25); }
.ms-card.c2 { background: rgba(6,182,212,.25); }
.ms-card.c3 { background: rgba(124,58,237,.25); }

.mockup-float {
  position: absolute; background: #fff; border-radius: 12px;
  padding: 10px 16px; font-size: .8rem; font-weight: 700; color: var(--dark);
  box-shadow: 0 8px 24px rgba(0,0,0,.2); display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
.mockup-float i { color: var(--primary); }
.f1 { top: -16px; right: -24px; animation: floatBadge 4s ease-in-out infinite; }
.f1 i { color: var(--accent); }
.f2 { bottom: 40px; right: -32px; animation: floatBadge 4s ease-in-out infinite 1.5s; }
.f2 i { color: #10b981; }
.f3 { bottom: -16px; left: -24px; animation: floatBadge 4s ease-in-out infinite 3s; }
.f3 i { color: var(--secondary); }
@keyframes floatBadge {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-6px) rotate(1deg); }
}

.hero-wave {
  position: absolute; bottom: 0; left: 0; right: 0;
  line-height: 0;
}
.hero-wave svg { width: 100%; height: 60px; display: block; }

/* ============================================================
   CLIENTS MARQUEE
   ============================================================ */
.clients-marquee {
  background: var(--light); padding: 20px 0;
  border-top: 1px solid rgba(0,0,0,.06);
  border-bottom: 1px solid rgba(0,0,0,.06);
  overflow: hidden;
}
.marquee-track { width: 100%; overflow: hidden; }
.marquee-inner {
  display: flex; gap: 48px; align-items: center;
  animation: marqueeScroll 25s linear infinite;
  width: max-content;
}
.marquee-inner span {
  font-size: .9rem; font-weight: 700; color: var(--gray);
  letter-spacing: .05em; white-space: nowrap;
  padding: 4px 24px; border-radius: 50px;
  background: #fff; border: 1px solid rgba(0,0,0,.08);
  transition: var(--transition);
}
.marquee-inner span:hover { color: var(--primary); border-color: var(--primary); }
@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ============================================================
   SERVICES
   ============================================================ */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.service-card {
  background: #fff; border-radius: var(--radius);
  padding: 36px 28px; border: 1px solid rgba(0,0,0,.07);
  transition: var(--transition); position: relative; overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,.04);
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--gradient); opacity: 0;
  transition: opacity .3s;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card:hover::before { opacity: 1; }
.service-card.featured {
  background: var(--dark); border-color: transparent;
  box-shadow: var(--shadow-lg);
}
.service-card.featured::before { opacity: 1; }
.service-card.featured h3 { color: #fff; }
.service-card.featured p { color: rgba(255,255,255,.65); }
.service-card.featured .service-features li { color: rgba(255,255,255,.75); }
.service-card.featured .service-features i { color: #10b981; }
.service-card.featured .service-link { color: var(--secondary); }
.service-badge {
  position: absolute; top: 16px; right: 16px;
  background: var(--gradient); color: #fff;
  font-size: .72rem; font-weight: 700; padding: 4px 12px; border-radius: 50px;
  letter-spacing: .06em;
}
.service-icon-wrap { margin-bottom: 20px; }
.service-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; transition: var(--transition);
}
.service-card[data-color="blue"] .service-icon { background: rgba(37,99,235,.12); color: var(--primary); }
.service-card[data-color="purple"] .service-icon { background: rgba(124,58,237,.12); color: #7c3aed; }
.service-card[data-color="teal"] .service-icon { background: rgba(6,182,212,.12); color: var(--secondary); }
.service-card[data-color="orange"] .service-icon { background: rgba(245,158,11,.12); color: var(--accent); }
.service-card[data-color="green"] .service-icon { background: rgba(16,185,129,.12); color: #10b981; }
.service-card[data-color="pink"] .service-icon { background: rgba(236,72,153,.12); color: #ec4899; }
.service-card.featured .service-icon { background: rgba(255,255,255,.12); color: #fff; }
.service-card:hover .service-icon { transform: scale(1.1) rotate(-5deg); }
.service-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.service-card p { font-size: .9rem; color: var(--gray); line-height: 1.6; margin-bottom: 16px; }
.service-features { margin-bottom: 20px; }
.service-features li { font-size: .85rem; color: var(--gray); display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.service-features i { color: #10b981; font-size: .7rem; flex-shrink: 0; }
.service-link { font-size: .88rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 6px; }
.service-link i { transition: transform .25s; }
.service-link:hover i { transform: translateX(4px); }

/* ============================================================
   WHY US
   ============================================================ */
.why-us { position: relative; overflow: hidden; }
.why-bg {
  position: absolute; inset: 0;
  background: var(--dark);
  background-image: radial-gradient(ellipse 60% 70% at 80% 50%, rgba(37,99,235,.2) 0%, transparent 70%),
                    radial-gradient(ellipse 40% 50% at 10% 30%, rgba(6,182,212,.12) 0%, transparent 70%);
}
.why-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}
.why-content .section-header { text-align: left; margin: 0 0 36px; }
.why-list { display: flex; flex-direction: column; gap: 24px; }
.why-item { display: flex; gap: 18px; align-items: flex-start; }
.why-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center;
  color: var(--secondary); font-size: 1.1rem; flex-shrink: 0;
  transition: var(--transition);
}
.why-item:hover .why-icon { background: var(--gradient); color: #fff; border-color: transparent; }
.why-text h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.why-text p { font-size: .88rem; color: rgba(255,255,255,.6); line-height: 1.6; }

/* --- Why visual --- */
.why-cards-stack { position: relative; padding: 24px 0; }
.why-card {
  background: rgba(255,255,255,.08); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius);
  padding: 20px 24px; display: flex; gap: 16px; align-items: center;
  margin-bottom: 16px; transition: var(--transition);
}
.why-card:hover { background: rgba(255,255,255,.12); transform: translateX(6px); }
.wc-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--gradient); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem; flex-shrink: 0;
}
.wc-info strong { display: block; color: #fff; font-weight: 700; font-size: .95rem; }
.wc-info span { color: rgba(255,255,255,.55); font-size: .8rem; }
.wc1 .wc-icon { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.wc2 .wc-icon { background: var(--gradient); }
.wc3 .wc-icon { background: linear-gradient(135deg, #10b981, #06b6d4); }
.why-metrics {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius); padding: 24px;
}
.wm-item { margin-bottom: 16px; }
.wm-item:last-child { margin-bottom: 0; }
.wm-bar { height: 6px; background: rgba(255,255,255,.1); border-radius: 4px; overflow: hidden; margin-bottom: 6px; }
.wm-fill { height: 100%; background: var(--gradient); border-radius: 4px; width: 0; transition: width 1.5s cubic-bezier(.4,0,.2,1); }
.wm-label { display: flex; justify-content: space-between; font-size: .8rem; color: rgba(255,255,255,.65); font-weight: 600; }

/* ============================================================
   PORTFOLIO
   ============================================================ */
.portfolio-filter { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.pf-btn {
  padding: 8px 20px; border-radius: 50px; font-size: .85rem; font-weight: 600;
  color: var(--gray); background: var(--light); border: 1.5px solid transparent;
  transition: var(--transition); cursor: pointer;
}
.pf-btn.active, .pf-btn:hover { color: var(--primary); border-color: var(--primary); background: rgba(37,99,235,.07); }
.portfolio-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 20px; margin-bottom: 40px;
}
.portfolio-item { border-radius: var(--radius); overflow: hidden; position: relative; cursor: pointer; aspect-ratio: 4/3; }
.portfolio-item.large { grid-column: span 1; grid-row: span 2; aspect-ratio: auto; }
.pi-thumb {
  width: 100%; height: 100%; min-height: 200px;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.pi-mockup {
  width: 80%; max-width: 220px;
  background: rgba(255,255,255,.08); border-radius: 10px;
  border: 1px solid rgba(255,255,255,.15); overflow: hidden;
}
.pi-bar { height: 20px; background: rgba(0,0,0,.3); display: flex; align-items: center; gap: 4px; padding: 0 8px; }
.pi-bar::before, .pi-bar::after { content: ''; width: 7px; height: 7px; border-radius: 50%; background: rgba(255,255,255,.3); }
.pi-content { padding: 12px; }
.pi-line { height: 8px; background: rgba(255,255,255,.2); border-radius: 4px; margin-bottom: 6px; }
.pi-line.w90 { width: 90%; } .pi-line.w80 { width: 80%; } .pi-line.w70 { width: 70%; }
.pi-line.w60 { width: 60%; } .pi-line.w50 { width: 50%; }
.pi-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 8px; }
.pi-grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: 8px; }
.pi-block { height: 36px; border-radius: 6px; background: rgba(255,255,255,.15); }
.pi-hero-mini { height: 48px; background: rgba(255,255,255,.2); border-radius: 6px; margin-bottom: 8px; }
.pi-btn-mini { height: 20px; width: 60%; background: rgba(255,255,255,.3); border-radius: 20px; }
.pi-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.6);
  display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-end;
  padding: 20px; opacity: 0; transition: var(--transition);
  backdrop-filter: blur(4px);
}
.portfolio-item:hover .pi-overlay { opacity: 1; }
.pi-cat {
  background: var(--gradient); color: #fff; font-size: .72rem; font-weight: 700;
  padding: 4px 12px; border-radius: 50px; letter-spacing: .06em; margin-bottom: 8px;
}
.pi-overlay h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 12px; flex: 1; display: flex; align-items: flex-end; }
.pi-link {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,.2); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; transition: var(--transition); position: absolute; top: 16px; right: 16px;
}
.pi-link:hover { background: var(--primary); }
.portfolio-cta { text-align: center; }

/* ============================================================
   PRICING
   ============================================================ */
.pricing { background: var(--light); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-bottom: 24px; }
.pricing-card {
  background: #fff; border-radius: var(--radius);
  border: 1.5px solid rgba(0,0,0,.07);
  overflow: hidden; transition: var(--transition);
  position: relative;
}
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pricing-card.popular {
  border-color: var(--primary); box-shadow: var(--shadow-lg);
  transform: translateY(-8px);
}
.pricing-card.popular:hover { transform: translateY(-12px); }
.pc-popular-badge {
  background: var(--gradient); color: #fff;
  text-align: center; padding: 6px; font-size: .78rem; font-weight: 800;
  letter-spacing: .12em;
}
.pc-header { padding: 32px 28px 24px; border-bottom: 1px solid rgba(0,0,0,.07); }
.pc-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--gradient); color: #fff; font-size: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.pc-header h3 { font-size: 1.15rem; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.pc-price { display: flex; align-items: baseline; gap: 4px; margin-bottom: 10px; }
.pc-from { font-size: .75rem; color: var(--gray); font-weight: 600; }
.pc-amount { font-size: 1.8rem; font-weight: 900; color: var(--primary); }
.pc-unit { font-size: 1rem; font-weight: 700; color: var(--primary); }
.pc-desc { font-size: .85rem; color: var(--gray); line-height: 1.5; }
.pc-features { padding: 24px 28px 28px; display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }
.pc-features li { font-size: .88rem; display: flex; align-items: center; gap: 10px; }
.pc-features li.yes { color: var(--dark2); }
.pc-features li.no { color: #cbd5e1; }
.pc-features li.yes i { color: #10b981; }
.pc-features li.no i { color: #cbd5e1; }
.pricing-card .btn { margin: 0 28px 28px; width: calc(100% - 56px); }
.pricing-note { text-align: center; font-size: .85rem; color: var(--gray); }
.pricing-note i { color: var(--primary); }

/* ============================================================
   PROCESS
   ============================================================ */
.process { background: var(--dark); }
.process .section-title { color: #fff; }
.process .section-tag { background: rgba(255,255,255,.1); color: rgba(255,255,255,.8); }
.process-steps {
  display: flex; align-items: flex-start; gap: 0;
  justify-content: space-between;
}
.process-step {
  flex: 1; text-align: center; padding: 0 16px;
  position: relative;
}
.ps-num {
  font-size: 3rem; font-weight: 900; color: rgba(37,99,235,.25);
  line-height: 1; margin-bottom: 12px;
  font-family: 'Montserrat', sans-serif;
}
.ps-icon {
  width: 64px; height: 64px; border-radius: 18px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--secondary); font-size: 1.4rem; margin: 0 auto 16px;
  transition: var(--transition);
}
.process-step:hover .ps-icon { background: var(--gradient); color: #fff; border-color: transparent; transform: scale(1.1); }
.process-step h4 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.process-step p { font-size: .82rem; color: rgba(255,255,255,.5); line-height: 1.5; }
.process-arrow { color: rgba(255,255,255,.2); font-size: 1.2rem; flex-shrink: 0; margin-top: 56px; }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials { background: var(--light); }
.testimonials-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.testi-card {
  background: #fff; border-radius: var(--radius);
  padding: 32px; border: 1px solid rgba(0,0,0,.07);
  transition: var(--transition); position: relative;
}
.testi-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.testi-card.featured { background: var(--dark); border-color: transparent; }
.testi-quote { position: absolute; top: 24px; right: 24px; color: rgba(37,99,235,.15); font-size: 2.5rem; }
.testi-card.featured .testi-quote { color: rgba(255,255,255,.08); }
.testi-stars { display: flex; gap: 3px; margin-bottom: 16px; }
.testi-stars i { color: var(--accent); font-size: .9rem; }
.testi-text { font-size: .9rem; color: var(--gray); line-height: 1.7; margin-bottom: 24px; font-style: italic; }
.testi-card.featured .testi-text { color: rgba(255,255,255,.7); }
.testi-author { display: flex; gap: 14px; align-items: center; }
.testi-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .85rem; color: #fff; flex-shrink: 0;
}
.av1 { background: linear-gradient(135deg, #2563eb, #06b6d4); }
.av2 { background: linear-gradient(135deg, #7c3aed, #ec4899); }
.av3 { background: linear-gradient(135deg, #059669, #06b6d4); }
.av4 { background: linear-gradient(135deg, #ea580c, #f59e0b); }
.testi-info strong { display: block; font-weight: 700; font-size: .92rem; color: var(--dark); }
.testi-info span { font-size: .8rem; color: var(--gray); }
.testi-card.featured .testi-info strong { color: #fff; }
.testi-card.featured .testi-info span { color: rgba(255,255,255,.55); }

/* ============================================================
   BLOG
   ============================================================ */
.blog-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; margin-bottom: 40px; }
.blog-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid rgba(0,0,0,.07); transition: var(--transition); }
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.blog-thumb {
  height: 200px; position: relative;
  display: flex; align-items: flex-start; padding: 16px;
}
.blog-card.featured-blog .blog-thumb { height: 260px; }
.bt1 { background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #06b6d4 100%); }
.bt2 { background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 60%, #c026d3 100%); }
.bt3 { background: linear-gradient(135deg, #064e3b 0%, #059669 60%, #06b6d4 100%); }
.blog-category {
  background: rgba(255,255,255,.2); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.3); color: #fff;
  font-size: .75rem; font-weight: 700; padding: 5px 14px; border-radius: 50px;
  letter-spacing: .06em;
}
.blog-body { padding: 24px; }
.blog-meta { display: flex; gap: 16px; margin-bottom: 12px; }
.blog-meta span { font-size: .78rem; color: var(--gray); display: flex; align-items: center; gap: 5px; }
.blog-card h3 { font-size: 1rem; font-weight: 700; color: var(--dark); line-height: 1.45; margin-bottom: 10px; }
.blog-card.featured-blog h3 { font-size: 1.15rem; }
.blog-card h3 a { color: inherit; }
.blog-card h3 a:hover { color: var(--primary); }
.blog-card p { font-size: .85rem; color: var(--gray); line-height: 1.6; margin-bottom: 16px; }
.blog-link { font-size: .85rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 6px; }
.blog-link i { transition: transform .25s; }
.blog-link:hover i { transform: translateX(4px); }
.blog-cta { text-align: center; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-section { position: relative; overflow: hidden; }
.contact-bg {
  position: absolute; inset: 0;
  background: var(--dark);
  background-image:
    radial-gradient(ellipse 60% 70% at 15% 50%, rgba(37,99,235,.25) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 85% 30%, rgba(6,182,212,.15) 0%, transparent 70%);
}
.contact-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; align-items: start;
}
.contact-info .section-header { text-align: left; margin: 0 0 36px; }
.contact-details { display: flex; flex-direction: column; gap: 20px; }
.cd-item { display: flex; gap: 16px; align-items: flex-start; }
.cd-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--secondary); font-size: 1rem; flex-shrink: 0;
}
.cd-text span { display: block; font-size: .78rem; color: rgba(255,255,255,.5); margin-bottom: 2px; }
.cd-text strong { color: #fff; font-size: .95rem; }

/* --- Form --- */
.contact-form-wrap {
  background: #fff; border-radius: var(--radius);
  padding: 40px; box-shadow: 0 24px 64px rgba(0,0,0,.25);
}
.contact-form h3 { font-size: 1.4rem; font-weight: 800; color: var(--dark); margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .82rem; font-weight: 700; color: var(--dark2); margin-bottom: 6px; }
.form-group label span { color: #ef4444; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 16px; border-radius: 10px;
  border: 1.5px solid rgba(0,0,0,.1); font-size: .9rem;
  color: var(--dark); background: var(--light);
  transition: border-color .25s, box-shadow .25s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
  background: #fff;
}
.form-group textarea { resize: vertical; }
.form-note { text-align: center; font-size: .78rem; color: var(--gray); margin-top: 12px; display: flex; align-items: center; justify-content: center; gap: 6px; }
.form-note i { color: #10b981; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--dark); color: rgba(255,255,255,.65); padding-top: 72px; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.5fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: .88rem; line-height: 1.7; margin: 16px 0 20px; }
.footer-socials { display: flex; gap: 10px; margin-bottom: 20px; }
.footer-socials a {
  width: 36px; height: 36px; border-radius: 8px;
  background: rgba(255,255,255,.08); color: rgba(255,255,255,.7);
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; transition: var(--transition);
}
.footer-socials a:hover { background: var(--gradient); color: #fff; transform: translateY(-2px); }
.footer-cert img { height: 36px; filter: brightness(0) invert(.7); }
.footer-col h4 { color: #fff; font-weight: 700; font-size: .95rem; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: .88rem; color: rgba(255,255,255,.55); display: flex; align-items: center; gap: 8px; transition: var(--transition); }
.footer-col ul a i { font-size: .65rem; color: var(--primary); }
.footer-col ul a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { font-size: .88rem; display: flex; gap: 10px; margin-bottom: 12px; }
.footer-contact i { color: var(--primary); margin-top: 2px; flex-shrink: 0; }
.footer-contact a { color: rgba(255,255,255,.55); }
.footer-contact a:hover { color: #fff; }
.footer-newsletter p { font-size: .85rem; margin-bottom: 10px; }
.newsletter-form { display: flex; gap: 0; border-radius: 10px; overflow: hidden; }
.newsletter-form input { flex: 1; padding: 10px 14px; border: none; background: rgba(255,255,255,.08); color: #fff; font-size: .85rem; }
.newsletter-form input::placeholder { color: rgba(255,255,255,.35); }
.newsletter-form button { padding: 10px 16px; background: var(--gradient); color: #fff; flex-shrink: 0; font-size: .9rem; transition: var(--transition); }
.newsletter-form button:hover { opacity: .85; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; }
.footer-bottom-inner { display: flex; align-items: center; justify-content: space-between; }
.footer-bottom p { font-size: .82rem; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: .82rem; color: rgba(255,255,255,.5); transition: color .25s; }
.footer-links a:hover { color: #fff; }

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed; bottom: 120px; right: 24px; z-index: 998;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--gradient); color: #fff; font-size: .9rem;
  box-shadow: 0 4px 20px rgba(37,99,235,.4);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateY(16px);
  transition: var(--transition); pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
.back-to-top:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(37,99,235,.5); }

/* ============================================================
   FLOAT BUTTONS
   ============================================================ */
.float-actions { position: fixed; bottom: 24px; right: 24px; z-index: 997; display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
.float-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 18px 10px 14px; border-radius: 50px;
  color: #fff; font-weight: 700; font-size: .82rem;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
  transition: var(--transition);
}
.float-btn.phone { background: linear-gradient(135deg, #10b981, #059669); }
.float-btn.zalo { background: linear-gradient(135deg, #0068ff, #0041c2); }
.float-btn:hover { transform: translateX(-4px); box-shadow: 0 8px 30px rgba(0,0,0,.3); }
.float-btn span { white-space: nowrap; }
.float-btn i { font-size: 1rem; }

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-40px); transition: opacity .7s ease, transform .7s ease; }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(40px); transition: opacity .7s ease, transform .7s ease; }
.reveal-right.visible { opacity: 1; transform: translateX(0); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-inner { grid-template-columns: 1fr; gap: 48px; }
  .why-visual { order: -1; }
  .blog-grid { grid-template-columns: 1fr 1fr; }
  .blog-card.featured-blog { grid-column: span 2; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-brand { grid-column: span 2; }
  .process-steps { flex-wrap: wrap; justify-content: center; gap: 24px; }
  .process-arrow { display: none; }
  .process-step { flex: 0 0 calc(33.333% - 16px); }
}

@media (max-width: 768px) {
  .topbar { display: none; }
  .nav { display: none; position: fixed; inset: 68px 0 0 0; background: #fff; z-index: 1000; padding: 24px; overflow-y: auto; }
  .nav.open { display: block; }
  .nav-list { flex-direction: column; gap: 4px; }
  .nav-link { font-size: 1rem; padding: 12px 16px; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; background: var(--light); margin-top: 4px; border-radius: var(--radius-sm); }
  .has-dropdown:hover .dropdown { display: block; }
  .hamburger { display: flex; }
  .header-cta { display: none; }
  .hero { padding: 80px 0 60px; min-height: auto; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
  .hero-stat-divider { display: none; }
  .services-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card.popular { transform: none; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr 1fr; }
  .portfolio-item.large { grid-column: span 2; }
  .blog-grid { grid-template-columns: 1fr; }
  .blog-card.featured-blog { grid-column: span 1; }
  .process-step { flex: 0 0 calc(50% - 12px); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { grid-column: 1; }
  .footer-bottom-inner { flex-direction: column; gap: 12px; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }
  .float-btn span { display: none; }
  .float-btn { padding: 12px; border-radius: 50%; }
  .float-btn.phone { padding: 12px; }
  .float-btn.zalo { padding: 10px; }
  .back-to-top { bottom: 80px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn-lg { width: 100%; justify-content: center; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .portfolio-item.large { grid-column: 1; }
  .mockup-browser { width: 100%; }
  .process-step { flex: 0 0 calc(100% - 0px); }
}