* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --dark: #0F172A;
  --neutral: #334155;
  --bg: #FFFFFF;
  --tint: #F8FAFC;
  --border: #E2E8F0;
  --border-card: #CBD5E1;
  --accent-1: #EA580C;
  --accent-2: #EAB308;
  --accent-3: #0284C7;
  --price-bg: #F0F9FF;
  --grad-1: #EF5324;
  --grad-2: #F6921E;
  --grad-3: #E5B820;
  --grad-4: #52B769;
  --grad-5: #2894D7;
  --grad-6: #1B60C8;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--neutral);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
h1, h2, h3, h4 { font-family: 'Montserrat', sans-serif; color: var(--dark); }
a { color: var(--accent-3); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.85; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Sticky Header with Prototypical Layout */
nav {
  position: relative;
  z-index: 100;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
}
nav::after {
  content: ""; position: absolute; bottom: -1px; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-3), var(--grad-4), var(--grad-5), var(--grad-6));
  opacity: 0.5;
}

nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Prototypical Top-Left Logo */
.logo-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-mark { height: 40px; width: auto; flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text .l1 { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 16px; text-transform: uppercase; color: var(--dark); letter-spacing: 0.02em; }
.logo-text .l2 { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 8.5px; text-transform: uppercase; color: var(--grad-5); letter-spacing: 0.05em; margin-top: 2px; }

/* Desktop Right Navigation */
.nav-right-desktop {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-right-desktop ul {
  list-style: none;
  display: flex;
  align-items: center;
  margin: 0; padding: 0;
}
.nav-right-desktop ul li { display: flex; align-items: center; }
.nav-right-desktop ul li:not(:last-child)::after {
  content: "";
  width: 1px;
  height: 14px;
  background: var(--border-card);
  margin: 0 18px;
  opacity: 0.6;
}
.nav-right-desktop ul a {
  font-size: 14px;
  font-weight: 600;
  color: var(--neutral);
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-right-desktop ul a:hover { color: var(--dark); }

.desktop-cta-btn {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF !important;
  background: var(--dark);
  padding: 10px 22px;
  border-radius: 6px;
  transition: transform 0.15s, background-color 0.15s;
}
.desktop-cta-btn:hover {
  transform: translateY(-1px);
  background: #1e293b;
  opacity: 1;
}

/* Mobile Dropdown - CRITICAL FIX: Hide by default on desktop */
.mobile-dropdown {
  display: none;
}

/* Hamburger Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile View Styling (under 960px) */
@media (max-width: 960px) {
  .nav-right-desktop { display: none; }
  .menu-toggle { display: flex; }

  .mobile-dropdown {
    display: block;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #FFFFFF !important;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12);
    padding: 12px 24px 24px;
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease, visibility 0.3s;
    z-index: 99;
  }
  .mobile-dropdown.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .mobile-dropdown ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    padding: 0; margin: 0;
  }
  .mobile-dropdown ul a {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 48px;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 1px solid var(--tint);
  }
  .mobile-dropdown .mobile-cta-wrapper {
    margin-top: 16px;
  }
  .mobile-dropdown .mobile-cta-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 48px;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 700;
    color: #FFFFFF !important;
    background: var(--dark);
    border-radius: 8px;
  }
}

/* Hero Section */
.hero { padding: 80px 0 64px; position: relative; overflow: hidden; background: var(--bg); }
.hero .wrap { position: relative; text-align: center; }
.eyebrow {
  font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 800;
  text-transform: uppercase; letter-spacing: 1.5px; color: var(--grad-5);
  margin-bottom: 20px;
}
.hero .slogan {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(32px, 5.5vw, 60px); font-weight: 800; line-height: 1.15;
  letter-spacing: -0.02em; color: var(--dark); max-width: 960px;
  margin: 0 auto 24px;
}
.hero .slogan .accent {
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3), var(--grad-4), var(--grad-5), var(--grad-6));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .secondary {
  font-family: 'Inter', sans-serif;
  font-size: clamp(18px, 2.3vw, 22px); font-weight: 500; line-height: 1.4;
  color: var(--neutral); max-width: 680px; margin: 0 auto 18px;
}
.hero .sub { font-size: clamp(15px, 1.8vw, 17px); color: var(--neutral); max-width: 620px; margin: 0 auto 32px; font-weight: 400; }
.hero-cta {
  display: inline-block; font-family: 'Inter', sans-serif; font-weight: 700; font-size: 15px;
  color: #fff; background: var(--accent-1); padding: 14px 32px; border-radius: 30px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.25);
}
.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(234, 88, 12, 0.35); opacity: 1; }

/* Content Sections */
section { padding: 80px 0; position: relative; }
section::before {
  content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 120px; height: 2px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-3), var(--grad-4), var(--grad-5));
  opacity: 0.3; border-radius: 2px;
}
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head .eyebrow { margin-bottom: 16px; }
.section-head h2 { font-size: clamp(24px, 3.5vw, 34px); font-weight: 800; line-height: 1.25; color: var(--dark); margin-bottom: 16px; letter-spacing: -0.01em; }
.section-head p { font-size: 16px; color: var(--neutral); line-height: 1.6; }

.grid { display: grid; gap: 20px; }
.grid-2x2 { grid-template-columns: repeat(2, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg); border: 1px solid var(--border-card); border-radius: 12px;
  padding: 28px; transition: transform 0.25s, box-shadow 0.25s; position: relative;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(15,23,42,0.07); }
.card .top-bar { position: absolute; top: 0; left: 0; right: 0; height: 4px; border-radius: 12px 12px 0 0; }
.card .icon { margin-bottom: 16px; }
.card .icon svg { stroke: var(--dark); stroke-width: 1.5; fill: none; }
.card .num { font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 800; letter-spacing: 1.5px; margin-bottom: 10px; display: block; text-transform: uppercase; }
.card h3 { font-size: 19px; font-weight: 700; line-height: 1.3; color: var(--dark); margin-bottom: 8px; }
.card p { color: var(--neutral); font-size: 15px; line-height: 1.6; }

.eng-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 28px; display: flex; flex-direction: column; gap: 14px;
}
.eng-card .node {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%; background: var(--dark); color: #fff;
  font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 800;
}
.eng-card h3 { font-size: 20px; font-weight: 700; color: var(--dark); }
.eng-card p { color: var(--neutral); font-size: 15px; line-height: 1.6; }
.price-tag {
  display: inline-block; font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 800;
  color: var(--grad-5); background: var(--price-bg); padding: 6px 18px; border-radius: 20px;
  align-self: flex-start; margin-top: auto;
}

.advantage { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.adv-item {
  background: var(--tint); border: 1px solid var(--border); border-radius: 12px; padding: 28px;
}
.adv-item .label {
  font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 800;
  text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 10px;
}
.adv-item:nth-child(1) .label { color: var(--grad-1); }
.adv-item:nth-child(2) .label { color: var(--grad-3); }
.adv-item:nth-child(3) .label { color: var(--grad-5); }
.adv-item h3 { font-size: 19px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.adv-item p { color: var(--neutral); font-size: 15px; line-height: 1.6; }

/* CTA Section */
.cta-section { padding: 88px 0; text-align: center; background: var(--dark); position: relative; }
.cta-section::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3), var(--grad-4), var(--grad-5), var(--grad-6));
  opacity: 0.8;
}
.cta-section h2 { font-size: clamp(28px, 4.5vw, 40px); font-weight: 800; color: #fff; margin-bottom: 20px; letter-spacing: -0.02em; }
.cta-section .person { color: #94a3b8; font-size: 16px; margin-bottom: 6px; font-weight: 500; }
.cta-section .email { color: var(--grad-5); font-size: 17px; font-weight: 600; margin-bottom: 28px; display: inline-block; }
.cta-section .email:hover { color: #fff; opacity: 1; }
.cta-btn {
  display: inline-block; font-family: 'Inter', sans-serif; font-weight: 700; font-size: 15px;
  color: #fff; background: var(--accent-1); padding: 14px 32px; border-radius: 30px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.25);
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(234, 88, 12, 0.35); opacity: 1; }

/* Footer */
footer { padding: 36px 0; background: var(--dark); border-top: 1px solid #1e293b; }
footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo .logo-mark { height: 32px; width: auto; }
.footer-logo .ft { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 13px; text-transform: uppercase; color: #94a3b8; letter-spacing: 0.02em; }
.footer-copy { color: #64748b; font-size: 13px; }

@media (max-width: 760px) {
  .grid-2x2, .grid-2, .advantage { grid-template-columns: 1fr; }
  section { padding: 56px 0; }
  .hero { padding: 56px 0 40px; }
  .cta-section { padding: 56px 0; }
  footer .wrap { flex-direction: column; text-align: center; }
  .footer-logo { justify-content: center; }
}