:root {
  /* Brand colors, taken from the approved PropClear PRO logo */
  --navy: #0B2545;          /* deep navy used on the guide and kit labels */
  --navy-dark: #071A33;
  --blue: #0A4E99;          /* logo shield and wordmark blue */
  --steel: #466B98;         /* logo shield rim */
  --ice: #EEF3F9;           /* light ice tint */
  --orange: #F37A1F;        /* logo orange */
  --orange-dark: #D9661A;
  --orange-text: #B4530E;   /* orange for small text on light backgrounds */
  --on-orange: #1A0F05;     /* text on orange fills */
  --white: #FFFFFF;
  --off-white: #F6F8FB;
  --gray-100: #F0F2F5;
  --gray-200: #DDE4EC;
  --gray-300: #C4CAD4;
  --gray-500: #5A6878;
  --gray-700: #2B3846;
  --gray-900: #16202C;
  --font-display: 'Saira', 'Arial Narrow', sans-serif;
  --font-body: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--gray-900);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; }

svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ========== NAV ========== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(11, 37, 69, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: all 0.3s ease;
}
nav.scrolled { background: rgba(11, 37, 69, 0.99); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }

.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 72px;
}

.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-logo img {
  height: 48px; width: 48px; object-fit: contain;
  background: var(--white); border-radius: 10px; padding: 3px;
}
.nav-logo span { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; color: var(--white); }
.nav-logo .pro { color: var(--orange); }

.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  color: rgba(255,255,255,0.92); text-decoration: none; font-size: 0.95rem; font-weight: 500;
  transition: color 0.2s; position: relative;
}
.nav-links a:hover { color: var(--orange); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--orange); transition: width 0.3s;
}
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: var(--orange); color: var(--on-orange); padding: 10px 24px; border-radius: 8px;
  text-decoration: none; font-weight: 700; font-size: 0.9rem; transition: all 0.3s;
  border: 2px solid transparent;
}
.nav-cta:hover { background: transparent; border-color: var(--orange); color: var(--orange); }

.mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: white; margin: 6px 0; transition: 0.3s; }

/* ========== HERO ========== */
.hero {
  position: relative; min-height: 100vh;
  background: var(--navy);
  display: flex; align-items: center; overflow: hidden;
}

.hero-bg-pattern {
  position: absolute; inset: 0; opacity: 0.05;
  background-image:
    radial-gradient(circle at 20% 50%, var(--orange) 1px, transparent 1px),
    radial-gradient(circle at 80% 20%, var(--orange) 1px, transparent 1px),
    radial-gradient(circle at 60% 80%, var(--white) 1px, transparent 1px);
  background-size: 60px 60px, 80px 80px, 40px 40px;
}

.hero-glow {
  position: absolute; top: -20%; right: -10%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(10,78,153,0.55) 0%, transparent 70%);
  border-radius: 50%; filter: blur(60px);
}

.hero-inner {
  max-width: 1200px; margin: 0 auto; padding: 120px 24px 80px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  position: relative; z-index: 2;
}

.hero-content h1 {
  font-size: 3.5rem; font-weight: 800; color: var(--white); margin-bottom: 20px;
}
.hero-content h1 .highlight { color: var(--orange); }

.hero-tagline {
  font-size: 1.3rem; color: rgba(255,255,255,0.92); font-weight: 400;
  margin-bottom: 32px; line-height: 1.55;
}

.hero-stats {
  display: flex; gap: 24px; margin-bottom: 40px; flex-wrap: wrap;
}
.hero-stat {
  text-align: center; padding: 16px 20px;
  background: rgba(255,255,255,0.08); border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.18);
}
.hero-stat .number { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--orange); line-height: 1.1; }
.hero-stat .label { font-size: 0.8rem; color: rgba(255,255,255,0.85); margin-top: 6px; text-transform: uppercase; letter-spacing: 1px; }

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  background: var(--orange); color: var(--on-orange); padding: 14px 32px; border-radius: 10px;
  text-decoration: none; font-weight: 700; font-size: 1rem; transition: all 0.3s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { background: var(--orange-dark); transform: translateY(-2px); }

.btn-secondary {
  background: transparent; color: var(--white); padding: 14px 32px; border-radius: 10px;
  text-decoration: none; font-weight: 600; font-size: 1rem; transition: all 0.3s;
  border: 2px solid rgba(255,255,255,0.5); display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { border-color: var(--white); background: rgba(255,255,255,0.06); }

.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-logo-container {
  position: relative; width: 380px; height: 380px;
  display: flex; justify-content: center; align-items: center;
}
.hero-logo-container img {
  width: 330px; height: 330px; object-fit: contain; position: relative; z-index: 1;
  background: var(--white); border-radius: 36px; padding: 32px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.35);
}
.logo-ring {
  position: absolute; inset: 10px; border: 2px solid rgba(243,122,31,0.35);
  border-radius: 44px; animation: pulse-ring 3s ease-in-out infinite;
}
.logo-ring:nth-child(2) { inset: -12px; border-radius: 54px; animation-delay: 1s; border-color: rgba(243,122,31,0.15); }
@keyframes pulse-ring { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.04); opacity: 0.5; } }
@media (prefers-reduced-motion: reduce) { .logo-ring { animation: none; } }

/* ========== SECTION STYLES ========== */
section { padding: 100px 24px; }
.section-inner { max-width: 1200px; margin: 0 auto; }

.section-label {
  font-family: var(--font-display); font-size: 0.9rem; font-weight: 700; text-transform: uppercase; letter-spacing: 3px;
  color: var(--orange-text); margin-bottom: 12px;
}

.section-title {
  font-size: 2.8rem; font-weight: 800; color: var(--navy); margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.15rem; color: var(--gray-500); max-width: 680px; margin-bottom: 60px;
}

/* ========== FEATURES ========== */
.features { background: var(--off-white); }

.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}

.feature-card {
  background: var(--white); border-radius: 16px; padding: 40px 32px;
  border: 1px solid var(--gray-200); transition: all 0.3s;
  position: relative; overflow: hidden;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(11,37,69,0.1); border-color: var(--orange); }

.feature-icon {
  width: 60px; height: 60px; border-radius: 14px; margin-bottom: 24px;
  display: flex; align-items: center; justify-content: center;
  background: var(--blue); color: var(--white);
}
.feature-icon svg { width: 30px; height: 30px; }
.feature-card:nth-child(even) .feature-icon { background: var(--orange); color: var(--on-orange); }

.feature-card h3 { font-size: 1.3rem; color: var(--navy); margin-bottom: 12px; }
.feature-card p { color: var(--gray-500); font-size: 0.97rem; line-height: 1.7; }

/* ========== TECHNOLOGY ========== */
.technology { background: var(--white); }

.tech-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}

.tech-steps { display: flex; flex-direction: column; gap: 24px; }

.tech-step {
  display: flex; gap: 24px; padding: 26px; border-radius: 16px;
  background: var(--off-white); border: 1px solid var(--gray-200); transition: all 0.3s;
}
.tech-step:hover { border-color: var(--orange); background: var(--white); box-shadow: 0 8px 30px rgba(11,37,69,0.08); }

.step-number {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px;
  background: var(--navy); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 800; font-size: 1.25rem;
}
.step-number.step-primer { background: var(--blue); }
.step-number.step-antiice { background: var(--orange); color: var(--on-orange); }

.tech-step h4 { font-size: 1.15rem; color: var(--navy); margin-bottom: 8px; }
.tech-step p { color: var(--gray-500); font-size: 0.93rem; line-height: 1.6; }

.tech-visual {
  background: var(--navy);
  border-radius: 24px; padding: 48px; position: relative; overflow: hidden;
}
.tech-visual::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(10,78,153,0.45), transparent 60%);
}

.tech-specs { position: relative; z-index: 2; }
.tech-specs h3 { color: var(--white); font-size: 1.4rem; margin-bottom: 24px; }
.tech-spec-item {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,0.1);
}
.tech-spec-item:last-child { border-bottom: none; }
.tech-spec-item .spec-label { color: rgba(255,255,255,0.75); font-size: 0.93rem; }
.tech-spec-item .spec-value { color: var(--orange); font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; text-align: right; }

/* ========== PRODUCTS (single kit) ========== */
.products { background: var(--off-white); }

.kit-card {
  max-width: 640px; background: var(--white); border-radius: 20px; overflow: hidden;
  border: 1px solid var(--gray-200); box-shadow: 0 20px 50px rgba(11,37,69,0.08);
}
.kit-header {
  background: var(--navy); padding: 28px 32px; display: flex; align-items: center; gap: 20px;
}
.kit-logo {
  width: 72px; height: 72px; object-fit: contain; flex-shrink: 0;
  background: var(--white); border-radius: 14px; padding: 6px;
}
.product-name { font-family: var(--font-display); font-size: 1.5rem; color: var(--white); font-weight: 700; line-height: 1.15; }
.product-size { color: rgba(255,255,255,0.75); font-size: 0.92rem; margin-top: 4px; }

.product-body { padding: 28px 32px 32px; }
.product-features { list-style: none; margin-bottom: 24px; }
.product-features li {
  padding: 12px 0; border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700); font-size: 0.98rem; display: flex; align-items: baseline; gap: 12px;
}
.product-features li:last-child { border-bottom: none; }
.product-features .qty { font-family: var(--font-display); font-weight: 800; color: var(--blue); width: 32px; flex-shrink: 0; }

.product-cta {
  display: block; text-align: center; padding: 14px; border-radius: 10px;
  text-decoration: none; font-weight: 700; transition: all 0.3s;
  background: var(--orange); color: var(--on-orange);
}
.product-cta:hover { background: var(--orange-dark); }

/* ========== USE CASES ========== */
.use-cases { background: var(--navy); }
.use-cases .section-label { color: var(--orange); }
.use-cases .section-title { color: var(--white); }
.use-cases .section-subtitle { color: rgba(255,255,255,0.75); }

.use-cases-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.use-case-card {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px; padding: 32px 24px; text-align: center; transition: all 0.3s;
}
.use-case-card:hover { background: rgba(255,255,255,0.09); border-color: var(--orange); transform: translateY(-4px); }
.use-case-icon {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1.5px solid rgba(243,122,31,0.6); color: var(--orange);
}
.use-case-icon svg { width: 28px; height: 28px; }
.use-case-card h3 { color: var(--white); font-size: 1.15rem; margin-bottom: 8px; }
.use-case-card p { color: rgba(255,255,255,0.72); font-size: 0.9rem; line-height: 1.55; }

/* ========== CONTACT ========== */
.contact { background: var(--white); }

.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }

.contact-info h3 { font-size: 1.6rem; color: var(--navy); margin-bottom: 16px; }
.contact-info p { color: var(--gray-500); margin-bottom: 32px; line-height: 1.7; }

.contact-detail {
  display: flex; align-items: center; gap: 16px; padding: 20px;
  background: var(--off-white); border-radius: 12px; margin-bottom: 16px;
  border: 1px solid var(--gray-200); transition: all 0.3s;
}
.contact-detail:hover { border-color: var(--orange); }
.contact-detail-icon {
  width: 48px; height: 48px; border-radius: 12px; background: var(--blue);
  color: var(--white); display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-detail-icon svg { width: 24px; height: 24px; }
.contact-detail-text .label { font-size: 0.8rem; color: var(--gray-500); text-transform: uppercase; letter-spacing: 1px; }
.contact-detail-text .value { color: var(--navy); font-weight: 600; font-size: 1rem; }
.contact-detail-text a { color: var(--navy); text-decoration: none; }
.contact-detail-text a:hover { color: var(--orange-text); }

.contact-form {
  background: var(--off-white); border-radius: 20px; padding: 40px;
  border: 1px solid var(--gray-200);
}
.contact-form h3 { font-size: 1.4rem; color: var(--navy); margin-bottom: 24px; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid var(--gray-300); border-radius: 10px;
  font-family: inherit; font-size: 0.95rem; transition: border-color 0.3s; background: var(--white); color: var(--gray-900);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-submit {
  background: var(--orange); color: var(--on-orange); padding: 14px 32px; border: none;
  border-radius: 10px; font-family: inherit; font-weight: 700; font-size: 1rem;
  cursor: pointer; width: 100%; transition: all 0.3s;
}
.form-submit:hover { background: var(--orange-dark); }

/* ========== FOOTER ========== */
footer {
  background: var(--navy-dark); padding: 60px 24px 30px; color: rgba(255,255,255,0.7);
}
.footer-inner { max-width: 1200px; margin: 0 auto; }

.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand img { height: 44px; width: 44px; object-fit: contain; background: var(--white); border-radius: 9px; padding: 3px; }
.footer-brand span { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: var(--white); }
.footer-brand .pro { color: var(--orange); }
.footer-desc { font-size: 0.92rem; line-height: 1.7; margin-bottom: 20px; }

.footer-col h4 { color: var(--white); font-size: 1rem; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 0.92rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--orange); }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
  padding-top: 30px; font-size: 0.85rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { order: -1; }
  .hero-logo-container { width: 280px; height: 280px; }
  .hero-logo-container img { width: 250px; height: 250px; padding: 24px; border-radius: 28px; }
  .logo-ring { border-radius: 36px; }
  .logo-ring:nth-child(2) { border-radius: 46px; }
  .hero-stats { justify-content: center; }
  .hero-buttons { justify-content: center; }
  .hero-content h1 { font-size: 2.8rem; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-layout { grid-template-columns: 1fr; }
  .use-cases-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.show {
    display: flex; flex-direction: column; gap: 18px;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--navy); padding: 20px 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  .nav-cta { display: none; }
  .mobile-toggle { display: block; }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-stats { flex-direction: column; gap: 12px; }
  .section-title { font-size: 2rem; }
  .features-grid, .use-cases-grid { grid-template-columns: 1fr; }
  .kit-header { flex-direction: column; text-align: center; }
  .product-body { padding: 24px 20px 28px; }
  .tech-visual { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 20px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}