:root {
  --dsf-black: #000000;
  --dsf-charcoal: #0f1115;
  --dsf-dark: #1a1d24;
  --dsf-steel: #b8bec6;
  --dsf-steel-light: #e8ebef;
  --dsf-accent: #E30613;
  --dsf-accent-hover: #c00510;
  --dsf-accent-glow: rgba(227, 6, 19, 0.25);
  --dsf-white: #ffffff;
  --dsf-light: #f4f6f8;
  --dsf-text: #2d3436;
  --dsf-muted: #6c757d;
  --dsf-whatsapp: #25D366;
  --dsf-radius: 16px;
  --dsf-radius-pill: 50px;
  --dsf-shadow: 0 10px 40px rgba(0,0,0,0.1);
  --dsf-glass: rgba(15, 17, 21, 0.85);
  --dsf-font: 'Inter', system-ui, -apple-system, sans-serif;
  --dsf-font-display: 'Rajdhani', 'Inter', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--dsf-font);
  color: var(--dsf-text);
  background: var(--dsf-white);
  overflow-x: hidden;
  padding-bottom: 80px;
}
@media (min-width: 992px) { body { padding-bottom: 0; } }

h1,h2,h3,h4,h5 { font-family: var(--dsf-font-display); font-weight: 700; }
a { text-decoration: none; color: inherit; transition: .3s; }
img { max-width: 100%; height: auto; }

/* Header */
.dsf-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1050;
  padding: 12px 0; transition: .4s;
}
.dsf-header.scrolled {
  background: var(--dsf-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 30px rgba(0,0,0,0.15);
  padding: 8px 0;
}
.dsf-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1320px; margin: 0 auto; padding: 0 20px;
}
.dsf-logo { display: flex; align-items: center; gap: 10px; }
.dsf-logo img { height: 44px; width: auto; }
.dsf-logo-text {
  font-family: var(--dsf-font-display);
  font-size: 1.1rem; font-weight: 700; color: var(--dsf-white);
  line-height: 1.2;
}
.dsf-logo-text span { color: var(--dsf-accent); font-size: .75rem; display: block; font-style: italic; }

.dsf-nav { display: none; gap: 6px; align-items: center; }
@media (min-width: 992px) { .dsf-nav { display: flex; } }
.dsf-nav a {
  color: rgba(255,255,255,0.85); padding: 8px 16px; border-radius: var(--dsf-radius-pill);
  font-size: .9rem; font-weight: 500;
}
.dsf-nav a:hover, .dsf-nav a.active {
  color: var(--dsf-white); background: rgba(227,6,19,0.2);
}
.dsf-nav .dropdown-menu {
  background: var(--dsf-dark); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--dsf-radius); padding: 8px; margin-top: 8px;
}
.dsf-nav .dropdown-item { color: rgba(255,255,255,0.85); border-radius: 8px; }
.dsf-nav .dropdown-item:hover { background: var(--dsf-accent); color: #fff; }

.dsf-header-actions { display: none; gap: 8px; align-items: center; }
@media (min-width: 992px) { .dsf-header-actions { display: flex; } }

.dsf-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px; border-radius: var(--dsf-radius-pill);
  font-weight: 600; font-size: .875rem; border: none; cursor: pointer;
  transition: .3s;
}
.dsf-btn-accent {
  background: var(--dsf-accent); color: #fff;
  box-shadow: 0 4px 20px var(--dsf-accent-glow);
}
.dsf-btn-accent:hover { background: var(--dsf-accent-hover); color: #fff; transform: translateY(-2px); }
.dsf-btn-outline {
  background: transparent; color: #fff;
  border: 1.5px solid rgba(255,255,255,0.3);
}
.dsf-btn-outline:hover { border-color: var(--dsf-accent); color: var(--dsf-accent); }
.dsf-btn-dark { background: var(--dsf-charcoal); color: #fff; }
.dsf-btn-whatsapp { background: var(--dsf-whatsapp); color: #fff; }
.dsf-btn-whatsapp:hover { background: #1da851; color: #fff; }

.dsf-menu-toggle {
  display: flex; background: rgba(255,255,255,0.1); border: none;
  color: #fff; width: 44px; height: 44px; border-radius: 12px;
  align-items: center; justify-content: center; font-size: 1.4rem; cursor: pointer;
}
@media (min-width: 992px) { .dsf-menu-toggle { display: none; } }

/* Mobile drawer */
.dsf-drawer {
  position: fixed; top: 0; right: -320px; width: 300px; height: 100vh;
  background: var(--dsf-charcoal); z-index: 2000; transition: .4s;
  padding: 24px; overflow-y: auto;
}
.dsf-drawer.open { right: 0; }
.dsf-drawer-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  z-index: 1999; opacity: 0; visibility: hidden; transition: .3s;
}
.dsf-drawer-overlay.open { opacity: 1; visibility: visible; }
.dsf-drawer a {
  display: flex; align-items: center; gap: 12px;
  color: rgba(255,255,255,0.9); padding: 14px 16px;
  border-radius: 12px; margin-bottom: 4px; font-weight: 500;
}
.dsf-drawer a:hover { background: rgba(227,6,19,0.15); color: var(--dsf-accent); }
.dsf-drawer a i { font-size: 1.2rem; width: 24px; text-align: center; }

/* Mobile bottom bar */
.dsf-bottom-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 1040;
  background: var(--dsf-charcoal); border-top: 1px solid rgba(255,255,255,0.08);
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
}
@media (min-width: 992px) { .dsf-bottom-bar { display: none; } }
.dsf-bottom-bar a {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  color: rgba(255,255,255,0.7); font-size: .65rem; padding: 4px;
}
.dsf-bottom-bar a i { font-size: 1.2rem; }
.dsf-bottom-bar a:hover, .dsf-bottom-bar a.active { color: var(--dsf-accent); }

/* Hero */
.dsf-hero {
  min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--dsf-black) 0%, var(--dsf-charcoal) 50%, #2a2f38 100%);
  position: relative; overflow: hidden; padding-top: 80px;
}
.dsf-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, var(--dsf-accent-glow) 0%, transparent 50%);
}
.dsf-hero-steel {
  position: absolute; right: -10%; top: 20%; width: 500px; height: 500px;
  background: linear-gradient(135deg, rgba(184,190,198,0.15), rgba(255,255,255,0.05));
  border-radius: 50%; filter: blur(60px);
}
.dsf-hero-content { position: relative; z-index: 2; }
.dsf-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem); color: #fff;
  line-height: 1.15; margin-bottom: 20px;
}
.dsf-hero h1 em { color: var(--dsf-accent); font-style: italic; }
.dsf-hero p { color: rgba(255,255,255,0.75); font-size: 1.1rem; max-width: 560px; }
.dsf-hero-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.dsf-badge {
  background: rgba(255,255,255,0.08); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.12); border-radius: var(--dsf-radius-pill);
  padding: 8px 16px; color: rgba(255,255,255,0.9); font-size: .8rem; font-weight: 500;
}
.dsf-badge i { color: var(--dsf-accent); margin-right: 6px; }

/* Sections */
.dsf-section { padding: 80px 0; }
.dsf-section-dark { background: var(--dsf-charcoal); color: #fff; }
.dsf-section-light { background: var(--dsf-light); }
.dsf-section-title { text-align: center; margin-bottom: 50px; }
.dsf-section-title h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); margin-bottom: 12px; }
.dsf-section-title p { color: var(--dsf-muted); max-width: 600px; margin: 0 auto; }
.dsf-section-dark .dsf-section-title p { color: rgba(255,255,255,0.6); }
.dsf-label {
  display: inline-block; color: var(--dsf-accent); font-weight: 600;
  font-size: .8rem; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 8px;
}

/* Cards */
.dsf-card {
  background: #fff; border-radius: var(--dsf-radius); padding: 28px;
  box-shadow: var(--dsf-shadow); border: 1px solid rgba(0,0,0,0.04);
  transition: .4s; height: 100%;
}
.dsf-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.12); }
.dsf-card-dark {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
}
.dsf-card-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, var(--dsf-accent), var(--dsf-accent-hover));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.4rem; margin-bottom: 16px;
}
.dsf-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.dsf-card p { color: var(--dsf-muted); font-size: .9rem; margin-bottom: 16px; }
.dsf-link { color: var(--dsf-accent); font-weight: 600; font-size: .875rem; }
.dsf-link:hover { color: var(--dsf-accent-hover); }

/* Service/Project cards with image */
.dsf-img-card {
  border-radius: var(--dsf-radius); overflow: hidden;
  box-shadow: var(--dsf-shadow); background: #fff; transition: .4s;
}
.dsf-img-card:hover { transform: translateY(-6px); }
.dsf-img-card img { width: 100%; height: 220px; object-fit: cover; }
.dsf-img-card-body { padding: 20px; }
.dsf-img-card .tag {
  display: inline-block; background: rgba(227,6,19,0.1); color: var(--dsf-accent);
  padding: 4px 12px; border-radius: var(--dsf-radius-pill); font-size: .75rem; font-weight: 600;
}

/* Counters */
.dsf-counter { text-align: center; padding: 30px; }
.dsf-counter .num {
  font-size: 2.8rem; font-weight: 800; color: var(--dsf-accent);
  font-family: var(--dsf-font-display);
}
.dsf-counter .label { color: var(--dsf-muted); font-size: .9rem; }
.dsf-section-dark .dsf-counter .label { color: rgba(255,255,255,0.6); }

/* Process steps */
.dsf-step {
  text-align: center; position: relative; padding: 20px;
}
.dsf-step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--dsf-accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; margin: 0 auto 14px; font-size: 1.1rem;
}

/* Testimonials */
.dsf-testimonial {
  background: #fff; border-radius: var(--dsf-radius); padding: 28px;
  box-shadow: var(--dsf-shadow); height: 100%;
}
.dsf-stars { color: #ffc107; margin-bottom: 12px; }
.dsf-testimonial .author { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.dsf-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--dsf-accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}

/* Gallery masonry */
.dsf-gallery-grid { columns: 2; column-gap: 16px; }
@media (min-width: 768px) { .dsf-gallery-grid { columns: 3; } }
@media (min-width: 1200px) { .dsf-gallery-grid { columns: 4; } }
.dsf-gallery-item {
  break-inside: avoid; margin-bottom: 16px; border-radius: var(--dsf-radius);
  overflow: hidden; cursor: pointer; position: relative;
}
.dsf-gallery-item img { width: 100%; display: block; transition: .4s; }
.dsf-gallery-item:hover img { transform: scale(1.05); }

/* FAQ */
.dsf-accordion .accordion-item {
  border: none; margin-bottom: 12px; border-radius: var(--dsf-radius) !important;
  overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.dsf-accordion .accordion-button {
  font-weight: 600; padding: 18px 24px; background: #fff;
}
.dsf-accordion .accordion-button:not(.collapsed) {
  background: var(--dsf-accent); color: #fff; box-shadow: none;
}
.dsf-accordion .accordion-button:focus { box-shadow: none; }

/* Forms */
.dsf-form-control {
  border: 1.5px solid #e0e0e0; border-radius: 12px; padding: 12px 16px;
  width: 100%; transition: .3s; font-size: .95rem;
}
.dsf-form-control:focus {
  outline: none; border-color: var(--dsf-accent);
  box-shadow: 0 0 0 3px var(--dsf-accent-glow);
}

/* CTA section */
.dsf-cta {
  background: linear-gradient(135deg, var(--dsf-accent), var(--dsf-accent-hover));
  border-radius: var(--dsf-radius); padding: 60px 40px; text-align: center; color: #fff;
}
.dsf-cta h2 { color: #fff; margin-bottom: 12px; }

/* Footer */
.dsf-footer {
  background: var(--dsf-black); color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}
.dsf-footer h5 { color: #fff; margin-bottom: 16px; }
.dsf-footer a { color: rgba(255,255,255,0.7); display: block; padding: 4px 0; }
.dsf-footer a:hover { color: var(--dsf-accent); }
.dsf-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 40px; padding-top: 20px; text-align: center; font-size: .85rem;
}

/* Floating elements */
.dsf-float-wa {
  position: fixed; bottom: 90px; right: 20px; z-index: 1030;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--dsf-whatsapp); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  animation: pulse-wa 2s infinite;
}
@media (min-width: 992px) { .dsf-float-wa { bottom: 24px; } }
@keyframes pulse-wa {
  0%,100% { box-shadow: 0 4px 20px rgba(37,211,102,0.4); }
  50% { box-shadow: 0 4px 30px rgba(37,211,102,0.7); }
}

.dsf-back-top {
  position: fixed; bottom: 90px; left: 20px; z-index: 1030;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--dsf-charcoal); color: #fff; border: none;
  display: none; align-items: center; justify-content: center; cursor: pointer;
}
@media (min-width: 992px) { .dsf-back-top { bottom: 24px; } }
.dsf-back-top.show { display: flex; }

/* Page header */
.dsf-page-header {
  background: linear-gradient(135deg, var(--dsf-black), var(--dsf-charcoal));
  padding: 120px 0 60px; text-align: center; color: #fff;
}
.dsf-page-header h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
.dsf-breadcrumb { justify-content: center; }
.dsf-breadcrumb a { color: var(--dsf-accent); }
.dsf-breadcrumb .active { color: rgba(255,255,255,0.6); }

/* Blog content */
.dsf-blog-content img { border-radius: var(--dsf-radius); margin: 16px 0; }
.dsf-blog-content h2, .dsf-blog-content h3 { margin-top: 24px; }

/* Loading */
.dsf-loader {
  position: fixed; inset: 0; background: var(--dsf-black); z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  transition: opacity .5s, visibility .5s;
}
.dsf-loader.hidden { opacity: 0; visibility: hidden; }
.dsf-loader-spinner {
  width: 48px; height: 48px; border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--dsf-accent); border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Filter pills */
.dsf-filters { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 40px; }
.dsf-filter-pill {
  padding: 8px 20px; border-radius: var(--dsf-radius-pill);
  border: 1.5px solid #ddd; background: #fff; font-size: .875rem; font-weight: 500;
  transition: .3s; cursor: pointer;
}
.dsf-filter-pill:hover, .dsf-filter-pill.active {
  background: var(--dsf-accent); color: #fff; border-color: var(--dsf-accent);
}

/* Alert */
.dsf-alert { border-radius: 12px; padding: 14px 20px; margin-bottom: 20px; }
.dsf-alert-success { background: #d4edda; color: #155724; }
.dsf-alert-error { background: #f8d7da; color: #721c24; }

/* Lightbox */
.dsf-lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,0.92); z-index: 3000;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.dsf-lightbox.open { display: flex; }
.dsf-lightbox img { max-height: 90vh; border-radius: var(--dsf-radius); }
.dsf-lightbox-close {
  position: absolute; top: 20px; right: 20px; background: none; border: none;
  color: #fff; font-size: 2rem; cursor: pointer;
}