/* ==========================================================
   DENSA.io — Global Stylesheet
   ========================================================== */

:root {
  --navy: #0a1d3a;
  --navy-2: #0f2a55;
  --accent: #00b4d8;
  --accent-2: #06d6f0;
  --teal: #02c39a;
  --light: #f5f8fc;
  --gray: #e6ecf3;
  --muted: #6b7a90;
  --text: #1a2233;
  --white: #ffffff;
  --shadow-sm: 0 4px 14px rgba(10, 29, 58, 0.08);
  --shadow-md: 0 10px 30px rgba(10, 29, 58, 0.12);
  --shadow-lg: 0 25px 60px rgba(10, 29, 58, 0.18);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
}

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

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--navy); }

h1, h2, h3, h4, h5 {
  font-family: 'Poppins', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--navy);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 1rem; }
h3 { font-size: 1.35rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; color: #46546b; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 90px 0; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-head p { color: var(--muted); font-size: 1.05rem; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--white);
  box-shadow: 0 8px 20px rgba(0, 180, 216, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 180, 216, 0.45);
  color: var(--white);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { background: var(--white); color: var(--navy); }
.btn-dark {
  background: var(--navy);
  color: var(--white);
}
.btn-dark:hover { background: var(--navy-2); color: var(--white); }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  z-index: 1000;
  transition: all var(--transition);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--gray);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}
.logo img { height: 80px; width: 500; }

.main-nav ul { display: flex; gap: 6px; list-style: none; align-items: center; }
.main-nav a {
  color: var(--navy);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  position: relative;
  transition: all var(--transition);
}
.main-nav a:hover { color: var(--accent); background: var(--light); }
.main-nav a.active { color: var(--accent); }
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 14px; right: 14px;
  height: 2px; background: var(--accent); border-radius: 2px;
}
.main-nav .nav-cta {
  background: var(--navy);
  color: var(--white) !important;
  margin-left: 10px;
}
.main-nav .nav-cta:hover { background: var(--accent); }

.hamburger {
  display: none;
  background: none; border: none;
  width: 40px; height: 40px;
  flex-direction: column; justify-content: center; gap: 5px;
  cursor: pointer;
}
.hamburger span {
  display: block; width: 24px; height: 2.5px;
  background: var(--navy); border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* push body content below sticky header */
main, .page-wrap { padding-top: 78px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(120deg, rgba(10,29,58,0.92) 0%, rgba(15,42,85,0.78) 60%, rgba(0,180,216,0.55) 100%),
    url('https://images.unsplash.com/photo-1551808525-51a94da548ce?auto=format&fit=crop&w=1900&q=80') center/cover no-repeat;
  color: var(--white);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(6, 214, 240, 0.18), transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(2, 195, 154, 0.18), transparent 50%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero .eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(0, 180, 216, 0.18);
  border: 1px solid rgba(0, 180, 216, 0.45);
  color: var(--accent-2);
  font-size: 0.8rem; letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 {
  color: var(--white);
  margin-bottom: 22px;
  letter-spacing: -0.02em;
}
.hero h1 span { color: var(--accent-2); }
.hero p.lead {
  font-size: 1.18rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 36px;
  max-width: 600px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 70px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat .num { font-size: 2.2rem; font-weight: 700; color: var(--accent-2); }
.hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.7); text-transform: uppercase; letter-spacing: 0.1em; }

/* ===== Services Grid ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--gray);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--accent), var(--teal));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--white);
  margin-bottom: 20px;
}
.service-icon svg { width: 28px; height: 28px; }
.service-card h3 { color: var(--navy); }
.service-card p { color: var(--muted); font-size: 0.95rem; }
.service-card .more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px; font-weight: 600; font-size: 0.9rem;
  color: var(--accent);
}

/* ===== Why Us ===== */
.why-us { background: var(--light); }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}
.why-item {
  background: var(--white);
  padding: 32px 24px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.why-item .icon-wrap {
  width: 64px; height: 64px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--accent), var(--teal));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--white);
}
.why-item .icon-wrap svg { width: 32px; height: 32px; }

/* ===== Testimonials ===== */
.testimonials { background: var(--navy); color: var(--white); }
.testimonials h2 { color: var(--white); }
.testimonial-slider {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}
.testimonial-track { overflow: hidden; }
.testimonial-slide {
  display: none;
  text-align: center;
  padding: 30px;
  animation: fadeIn 0.6s ease;
}
.testimonial-slide.active { display: block; }
.testimonial-slide blockquote {
  font-size: 1.4rem;
  line-height: 1.6;
  font-weight: 400;
  margin-bottom: 30px;
  color: rgba(255,255,255,0.92);
  font-style: italic;
}
.testimonial-stars { color: #fcb716; margin-bottom: 16px; font-size: 1.2rem; }
.testimonial-author strong { color: var(--accent-2); }
.testimonial-author span { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.slider-controls {
  display: flex; justify-content: center; gap: 10px; margin-top: 30px;
}
.slider-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.25);
  border: none; cursor: pointer; padding: 0;
  transition: all var(--transition);
}
.slider-dot.active { background: var(--accent-2); transform: scale(1.3); }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ===== CTA ===== */
.cta-band {
  background: linear-gradient(135deg, var(--accent) 0%, var(--teal) 100%);
  color: var(--white);
  padding: 70px 0;
}
.cta-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 24px;
}
.cta-band h2 { color: var(--white); margin: 0; }
.cta-band p { color: rgba(255,255,255,0.9); margin: 6px 0 0; }
.cta-band .btn-dark { background: var(--navy); }

/* ===== Page Banner ===== */
.page-banner {
  background:
    linear-gradient(120deg, rgba(10,29,58,0.94), rgba(15,42,85,0.82)),
    url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1900&q=80') center/cover no-repeat;
  color: var(--white);
  padding: 130px 0 70px;
  text-align: center;
}
.page-banner h1 { color: var(--white); margin-bottom: 12px; }
.page-banner p { color: rgba(255,255,255,0.85); max-width: 640px; margin: 0 auto; }
.breadcrumbs {
  display: inline-flex; gap: 8px; align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 8px 16px; border-radius: 999px;
  font-size: 0.85rem; margin-bottom: 22px;
}
.breadcrumbs a { color: rgba(255,255,255,0.85); }
.breadcrumbs a:hover { color: var(--accent-2); }
.breadcrumbs span { color: rgba(255,255,255,0.5); }

/* ===== Two-col content ===== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.two-col img { border-radius: var(--radius); box-shadow: var(--shadow-md); }
.two-col.reverse > div:first-child { order: 2; }

/* ===== Feature list ===== */
.feature-list { list-style: none; margin-top: 20px; }
.feature-list li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 0;
  color: #36425a;
}
.feature-list li::before {
  content: '✓';
  background: linear-gradient(135deg, var(--accent), var(--teal));
  color: var(--white);
  width: 24px; height: 24px; min-width: 24px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
  margin-top: 4px;
}

/* ===== Blog / cards ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}
.blog-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--gray);
}
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.blog-card .img-wrap { height: 220px; overflow: hidden; }
.blog-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
}
.blog-card:hover img { transform: scale(1.06); }
.blog-card .body { padding: 24px; }
.blog-card .meta {
  font-size: 0.8rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 10px;
}
.blog-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.blog-card a.read-more {
  font-weight: 600; font-size: 0.9rem; color: var(--accent);
  display: inline-flex; align-items: center; gap: 6px;
}

/* ===== Contact ===== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 50px;
}
.contact-form {
  background: var(--white);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--navy); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--gray);
  border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.95rem;
  transition: border-color var(--transition);
  background: var(--light);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  background: var(--white);
}
.field textarea { resize: vertical; min-height: 130px; }

.contact-info-card {
  background: var(--navy);
  color: var(--white);
  padding: 40px;
  border-radius: var(--radius);
}
.contact-info-card h3 { color: var(--white); }
.info-item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.info-item:last-child { border-bottom: none; }
.info-item .ico {
  width: 42px; height: 42px; min-width: 42px;
  background: rgba(0,180,216,0.18);
  color: var(--accent-2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.info-item .ico svg { width: 20px; height: 20px; }
.info-item h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 4px; }
.info-item p, .info-item a { color: rgba(255,255,255,0.78); font-size: 0.9rem; margin: 0; }

.map-wrap {
  margin-top: 60px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  height: 420px;
}
.map-wrap iframe { width: 100%; height: 100%; border: 0; }

/* ===== Footer ===== */
.site-footer {
  background: #061229;
  color: rgba(255,255,255,0.75);
  padding-top: 70px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 50px;
}
.footer-col h4 {
  color: var(--white);
  font-size: 1.05rem;
  margin-bottom: 18px;
  position: relative; padding-bottom: 10px;
}
.footer-col h4::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  width: 36px; height: 2px;
  background: var(--accent);
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; font-size: 0.92rem; }
.footer-col a { color: rgba(255,255,255,0.7); }
.footer-col a:hover { color: var(--accent-2); }
.footer-logo { width: 150px; margin-bottom: 16px; border-radius: 6px; }
.contact-list li { color: rgba(255,255,255,0.7); font-size: 0.9rem; line-height: 1.5; }
.social { display: flex; gap: 10px; margin-top: 18px; }
.social a {
  width: 38px; height: 38px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.85);
}
.social a:hover { background: var(--accent); color: var(--white); }
.social svg { width: 16px; height: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  font-size: 0.85rem;
  text-align: center;
  color: rgba(255,255,255,0.5);
}

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 48px; height: 48px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none;
  transition: all var(--transition);
  z-index: 999;
  display: flex; align-items: center; justify-content: center;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: var(--navy); transform: translateY(-3px); }

/* ===== Animation utilities ===== */
.fade-in { opacity: 0; transform: translateY(24px); transition: all 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Detail pages ===== */
.detail-content { max-width: 860px; margin: 0 auto; }
.detail-content h2 { margin-top: 30px; }
.detail-content img { border-radius: var(--radius); margin: 24px 0; }
.case-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin: 30px 0;
}
.case-meta div {
  background: var(--light);
  padding: 18px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}
.case-meta strong { display: block; font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .two-col.reverse > div:first-child { order: 0; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  section { padding: 64px 0; }
  .main-nav {
    position: fixed;
    top: 78px; left: 0; right: 0;
    background: var(--white);
    padding: 20px;
    transform: translateY(-150%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--gray);
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; gap: 4px; align-items: stretch; }
  .main-nav a { display: block; padding: 14px 16px; }
  .main-nav .nav-cta { margin-left: 0; text-align: center; }
  .hamburger { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
  .contact-form { padding: 28px; }
  .contact-info-card { padding: 28px; }
}