/* =========================================================
   DigiSkills — style.css
   AI Powered Solutions • Smarter Systems • Africa Focused
   ========================================================= */

/* ---------- 1. Design tokens ---------- */
:root {
  --ds-orange: #FF7900;
  --ds-orange-600: #E56C00;
  --ds-orange-100: #FFEBD9;
  --ds-black: #111111;
  --ds-black-800: #1a1a1a;
  --ds-white: #FFFFFF;
  --ds-bg: #FAFAFA;
  --ds-gray-100: #F4F4F4;
  --ds-gray-200: #EAEAEA;
  --ds-gray-300: #DDDDDD;
  --ds-text: #111111;
  --ds-text-muted: #666666;

  --ds-radius-sm: 8px;
  --ds-radius: 14px;
  --ds-radius-lg: 20px;

  --ds-shadow-sm: 0 1px 2px rgba(17,17,17,0.04), 0 1px 3px rgba(17,17,17,0.03);
  --ds-shadow: 0 4px 12px rgba(17,17,17,0.06), 0 2px 4px rgba(17,17,17,0.04);
  --ds-shadow-lg: 0 12px 32px rgba(17,17,17,0.08), 0 4px 12px rgba(17,17,17,0.05);

  --ds-container-pad: clamp(1rem, 2vw, 2rem);
  --ds-section-pad: clamp(4rem, 8vw, 7rem);
  --ds-font: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --ds-transition-fast: 150ms cubic-bezier(0.2, 0, 0, 1);
  --ds-transition: 220ms cubic-bezier(0.2, 0, 0, 1);
  --ds-transition-slow: 400ms cubic-bezier(0.2, 0, 0, 1);
}

/* ---------- 2. Base ---------- */
* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ds-font);
  font-weight: 400;
  color: var(--ds-text);
  background-color: var(--ds-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--ds-text);
  text-decoration: none;
  transition: color var(--ds-transition-fast);
}
a:hover { color: var(--ds-orange); }

::selection { background: var(--ds-orange); color: var(--ds-white); }

.text-ds-orange { color: var(--ds-orange) !important; }
.bg-ds-orange { background-color: var(--ds-orange) !important; }
.bg-ds-dark { background-color: var(--ds-black) !important; }

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--ds-black);
  color: var(--ds-white);
  padding: 8px 12px;
  z-index: 2000;
  border-radius: 6px;
}

/* ---------- 3. Typography ---------- */
.ds-h1 {
  font-family: var(--ds-font);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  font-size: clamp(2.25rem, 5vw, 4rem);
  margin: 0.5rem 0 1.5rem;
  color: var(--ds-black);
}

.ds-h2 {
  font-family: var(--ds-font);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  margin: 0.5rem 0 1.25rem;
  color: var(--ds-black);
}

.ds-lead {
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  color: var(--ds-text-muted);
  line-height: 1.7;
  font-weight: 400;
  max-width: 62ch;
  margin-bottom: 1rem;
}

.ds-lead-dark { color: rgba(255,255,255,0.72); }

.ds-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ds-orange);
  margin: 0 0 1.25rem;
}
.ds-eyebrow.justify-content-center { justify-content: center; }
.ds-eyebrow-dark { color: var(--ds-orange); }
.ds-eyebrow-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--ds-orange);
  border-radius: 50%;
}

/* ---------- 4. Buttons ---------- */
.btn {
  font-family: var(--ds-font);
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  transition: transform var(--ds-transition), box-shadow var(--ds-transition), background var(--ds-transition), color var(--ds-transition), border-color var(--ds-transition);
  border: 1.5px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-ds-primary {
  background: var(--ds-orange);
  color: var(--ds-white);
  border-color: var(--ds-orange);
}
.btn-ds-primary:hover,
.btn-ds-primary:focus {
  background: var(--ds-orange-600);
  border-color: var(--ds-orange-600);
  color: var(--ds-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255,121,0,0.25);
}

.btn-ds-ghost {
  background: transparent;
  color: var(--ds-black);
  border-color: var(--ds-gray-300);
}
.btn-ds-ghost:hover,
.btn-ds-ghost:focus {
  border-color: var(--ds-black);
  color: var(--ds-black);
  transform: translateY(-2px);
}

.btn-ds-dark {
  background: var(--ds-black);
  color: var(--ds-white);
  border-color: var(--ds-black);
}
.btn-ds-dark:hover,
.btn-ds-dark:focus {
  background: #000;
  color: var(--ds-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

.btn:focus-visible {
  outline: 2px solid var(--ds-orange);
  outline-offset: 3px;
}

/* ---------- 5. Navbar ---------- */
.ds-navbar {
  padding: 1rem 0;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  transition: background var(--ds-transition), box-shadow var(--ds-transition), padding var(--ds-transition);
  border-bottom: 1px solid transparent;
}

.ds-navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 2px 12px rgba(17,17,17,0.06);
  padding: 0.6rem 0;
  border-bottom-color: var(--ds-gray-200);
}

.ds-navbar .navbar-brand img { transition: height var(--ds-transition); }

/* Inlined brand — icon + wordmark. Guarantees the wordmark uses Poppins. */
.ds-brand { text-decoration: none; }
.ds-brand-icon {
  width: 38px;
  height: 38px;
  display: block;
  transition: width var(--ds-transition), height var(--ds-transition);
}
.ds-brand-text {
  font-family: 'Poppins', Arial, sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--ds-black);
  letter-spacing: -0.01em;
}
.ds-navbar.scrolled .ds-brand-icon { width: 32px; height: 32px; }
.ds-navbar.scrolled .ds-brand-text { font-size: 1.2rem; }

.ds-navbar .nav-link {
  color: var(--ds-black);
  font-weight: 500;
  font-size: 0.94rem;
  padding: 0.5rem 0.85rem;
  position: relative;
  transition: color var(--ds-transition-fast);
}

.ds-navbar .nav-link::after {
  content: '';
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.35rem;
  height: 2px;
  background: var(--ds-orange);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--ds-transition);
}
.ds-navbar .nav-link:hover,
.ds-navbar .nav-link.active {
  color: var(--ds-orange);
}
.ds-navbar .nav-link.active::after,
.ds-navbar .nav-link:hover::after { transform: scaleX(1); }

.ds-navbar .navbar-toggler:focus { box-shadow: none; }

/* Offcanvas mobile menu */
.ds-offcanvas {
  --bs-offcanvas-width: 320px;
  border-left: 1px solid var(--ds-gray-200);
}
.ds-offcanvas .mobile-nav-list .nav-link {
  color: var(--ds-black);
  font-weight: 500;
  font-size: 1.05rem;
  padding: 0.85rem 0.5rem;
  border-bottom: 1px solid var(--ds-gray-200);
}
.ds-offcanvas .mobile-nav-list .nav-link:hover { color: var(--ds-orange); }

/* ---------- 6. Layout / sections ---------- */
.ds-section {
  padding: var(--ds-section-pad) 0;
  position: relative;
}
.ds-section-alt { background: var(--ds-gray-100); }
.ds-section-quiet { background: var(--ds-bg); }

/* ---------- 7. Hero ---------- */
.ds-hero {
  position: relative;
  padding: calc(var(--ds-section-pad) + 4rem) 0 var(--ds-section-pad);
  overflow: hidden;
  background: var(--ds-bg);
}

.ds-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(17,17,17,0.05) 1px, transparent 0);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 40%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

.ds-hero .container { position: relative; z-index: 1; }

.ds-pillars {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.ds-pillars li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
  color: var(--ds-black);
}
.ds-pillar-bullet {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ds-orange);
  box-shadow: 0 0 0 4px rgba(255,121,0,0.14);
  flex-shrink: 0;
}

.ds-hero-visual {
  position: relative;
  padding: 1rem;
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow);
}
.ds-hero-visual svg { width: 100%; height: auto; }

.ds-hero-caption {
  position: absolute;
  bottom: 1.25rem;
  left: 1.25rem;
  right: 1.25rem;
  background: rgba(17,17,17,0.9);
  color: var(--ds-white);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  backdrop-filter: blur(4px);
}
.ds-hero-caption strong { color: var(--ds-orange); }
.ds-hero-caption-dot {
  width: 8px;
  height: 8px;
  background: var(--ds-orange);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255,121,0,0.25);
  animation: dotPulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Hero SVG animations */
.pulse-dot { animation: mapPulse 2.4s ease-in-out infinite; transform-origin: center; transform-box: fill-box; }
@keyframes mapPulse {
  0% { r: 4; opacity: 0.8; }
  100% { r: 16; opacity: 0; }
}

.circuit-line { stroke-dasharray: 4 6; animation: dashMove 6s linear infinite; }
@keyframes dashMove {
  to { stroke-dashoffset: -60; }
}

.signal-dot { filter: drop-shadow(0 0 3px rgba(255,121,0,0.6)); }

.node-group circle:first-child { animation: nodeBreathe 3.5s ease-in-out infinite; transform-origin: center; transform-box: fill-box; }
@keyframes nodeBreathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Rotating globe — continent strip loops seamlessly through the clipped sphere */
.globe-strip { animation: globeSpin 22s linear infinite; }
@keyframes globeSpin {
  from { transform: translateX(0); }
  to   { transform: translateX(-500px); }
}

/* Security shield — protective ripples, breathing shield, drawing checkmark */
.sec-ring {
  transform-origin: center;
  transform-box: fill-box;
  animation: secRingPulse 4.2s ease-out infinite;
}
.sec-ring-1 { animation-delay: 0s; }
.sec-ring-2 { animation-delay: 1.4s; }
.sec-ring-3 { animation-delay: 2.8s; }
@keyframes secRingPulse {
  0%   { transform: scale(0.55); opacity: 0.7; }
  70%  { opacity: 0.15; }
  100% { transform: scale(2.35); opacity: 0; }
}

.sec-shield {
  transform-origin: center;
  transform-box: fill-box;
  animation: secShieldBreathe 4.2s ease-in-out infinite;
}
@keyframes secShieldBreathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.04); }
}

.sec-check {
  stroke-dasharray: 70;
  stroke-dashoffset: 70;
  animation: secCheckDraw 4.2s ease-in-out infinite;
  filter: drop-shadow(0 0 3px rgba(255, 121, 0, 0.4));
}
@keyframes secCheckDraw {
  0%   { stroke-dashoffset: 70; opacity: 0; }
  10%  { stroke-dashoffset: 70; opacity: 1; }
  35%  { stroke-dashoffset: 0;  opacity: 1; }
  85%  { stroke-dashoffset: 0;  opacity: 1; }
  95%  { stroke-dashoffset: 0;  opacity: 0; }
  100% { stroke-dashoffset: 70; opacity: 0; }
}

.sec-dot {
  transform-origin: center;
  transform-box: fill-box;
  animation: secDotPulse 2.6s ease-in-out infinite;
}
.sec-dot-1 { animation-delay: 0s; }
.sec-dot-2 { animation-delay: 0.5s; }
.sec-dot-3 { animation-delay: 1s; }
.sec-dot-4 { animation-delay: 1.5s; }
@keyframes secDotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.35; transform: scale(0.55); }
}

.sec-flow {
  stroke-dasharray: 3 4;
  animation: secFlow 3s linear infinite;
}
@keyframes secFlow {
  to { stroke-dashoffset: -70; }
}

@media (prefers-reduced-motion: reduce) {
  .globe-strip,
  .sec-ring, .sec-shield, .sec-check, .sec-dot, .sec-flow { animation: none; }
  .sec-check { stroke-dashoffset: 0; opacity: 1; }
}


/* ---------- 8. Services ---------- */
.ds-service-card {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius);
  padding: 2rem 1.75rem;
  transition: transform var(--ds-transition), box-shadow var(--ds-transition), border-color var(--ds-transition);
  position: relative;
  overflow: hidden;
}
.ds-service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-top: 3px solid transparent;
  border-radius: var(--ds-radius);
  transition: border-color var(--ds-transition);
  pointer-events: none;
}
.ds-service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ds-shadow-lg);
  border-color: var(--ds-gray-300);
}
.ds-service-card:hover::before { border-top-color: var(--ds-orange); }

.ds-service-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.ds-service-num {
  font-family: var(--ds-font);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ds-orange);
  letter-spacing: 0.05em;
}
.ds-service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--ds-gray-100);
  color: var(--ds-black);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  transition: background var(--ds-transition), color var(--ds-transition);
}
.ds-service-card:hover .ds-service-icon {
  background: var(--ds-orange);
  color: var(--ds-white);
}
.ds-service-title {
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ds-black);
  margin-bottom: 0.5rem;
}
.ds-service-copy {
  color: var(--ds-text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 0;
}

/* ---------- 9. AI Section ---------- */
.ds-ai-example {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-weight: 500;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: transform var(--ds-transition-fast), border-color var(--ds-transition-fast);
}
.ds-ai-example:hover {
  transform: translateY(-1px);
  border-color: var(--ds-orange);
}
.ds-ai-example i { font-size: 1.1rem; }

.ds-ai-flow {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--ds-shadow);
}
.ds-ai-flow svg { width: 100%; max-height: 560px; }

.signal-flow { filter: drop-shadow(0 0 4px rgba(255,121,0,0.5)); }

/* ---------- 10. Security ---------- */
.ds-security-visual {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--ds-shadow-sm);
}

.ds-security-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-weight: 500;
  transition: transform var(--ds-transition-fast), border-color var(--ds-transition-fast);
}
.ds-security-item:hover {
  border-color: var(--ds-orange);
  transform: translateY(-1px);
}
.ds-security-item i {
  color: var(--ds-orange);
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

/* ---------- 11. About / Dark section ---------- */
.ds-section-dark {
  background: var(--ds-black);
  color: var(--ds-white);
  overflow: hidden;
  position: relative;
}
.ds-section-dark .ds-h2 { color: var(--ds-white); }

.ds-about-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.035;
  pointer-events: none;
}
.ds-about-bg img { width: 60%; max-width: 700px; filter: brightness(3); }

.ds-principle {
  padding: 2rem 1.75rem;
  border-radius: var(--ds-radius);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  height: 100%;
  transition: transform var(--ds-transition), border-color var(--ds-transition), background var(--ds-transition);
}
.ds-principle:hover {
  transform: translateY(-4px);
  border-color: rgba(255,121,0,0.5);
  background: rgba(255,255,255,0.05);
}
.ds-principle-num {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ds-orange);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.ds-principle-title {
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ds-white);
  margin-bottom: 0.5rem;
}
.ds-principle-copy {
  color: rgba(255,255,255,0.68);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 0;
}

/* ---------- 12. Technologies ---------- */
.ds-tech-card {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius);
  padding: 1.75rem;
  height: 100%;
  transition: transform var(--ds-transition), box-shadow var(--ds-transition), border-color var(--ds-transition);
}
.ds-tech-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--ds-shadow);
  border-color: var(--ds-gray-300);
}
.ds-tech-card-accent {
  background: linear-gradient(135deg, #FFFFFF 0%, #FFF7EE 100%);
  border-color: #FFDDB5;
}

.ds-tech-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.ds-tech-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--ds-black);
  color: var(--ds-orange);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}
.ds-tech-title {
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0;
}

.ds-chips {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.ds-chips li {
  background: var(--ds-gray-100);
  color: var(--ds-black);
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: background var(--ds-transition-fast), color var(--ds-transition-fast), border-color var(--ds-transition-fast);
}
.ds-chips li:hover {
  background: var(--ds-white);
  color: var(--ds-orange);
  border-color: var(--ds-orange);
}

/* ---------- 13. Approach / Timeline ---------- */
.ds-timeline { position: relative; padding: 2rem 0; }

.ds-timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  position: relative;
  counter-reset: step;
}

.ds-timeline-line {
  position: absolute;
  top: 55px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--ds-orange) 15%, var(--ds-orange) 85%, transparent 100%);
  z-index: 0;
}

.ds-timeline-item {
  position: relative;
  padding: 0 0.5rem;
  text-align: center;
  z-index: 1;
}

.ds-timeline-node {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  background: var(--ds-white);
  border: 2px solid var(--ds-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--ds-orange);
  position: relative;
  transition: background var(--ds-transition), color var(--ds-transition), transform var(--ds-transition);
  box-shadow: 0 0 0 6px var(--ds-gray-100);
}
.ds-timeline-item:hover .ds-timeline-node {
  background: var(--ds-orange);
  color: var(--ds-white);
  transform: scale(1.05);
}
.ds-timeline-title {
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
  color: var(--ds-black);
}
.ds-timeline-copy {
  color: var(--ds-text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0;
}

/* Mobile timeline */
@media (max-width: 991px) {
  .ds-timeline-list {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-left: 2rem;
  }
  .ds-timeline-line {
    top: 0;
    left: 30px;
    right: auto;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, var(--ds-orange) 10%, var(--ds-orange) 90%, transparent 100%);
  }
  .ds-timeline-item {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: 1rem;
    text-align: left;
    padding: 0;
  }
  .ds-timeline-node { margin: 0; }
  .ds-timeline-body { padding-top: 0.5rem; }
}

/* ---------- 14. Malawi / Africa ---------- */
.ds-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 30px;
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-300);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ds-black);
}
.ds-tag-solid {
  background: var(--ds-black);
  color: var(--ds-white);
  border-color: var(--ds-black);
}

.ds-map-visual {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius-lg);
  padding: 2rem;
  box-shadow: var(--ds-shadow-sm);
}

.pulse-ring {
  transform-origin: center;
  transform-box: fill-box;
  animation: ringPulse 2.4s ease-out infinite;
}
@keyframes ringPulse {
  0% { transform: scale(0.5); opacity: 0.8; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ---------- 15. Philosophy ---------- */
.ds-quote-mark {
  font-size: 3.5rem;
  color: var(--ds-orange);
  display: block;
  line-height: 1;
  margin-bottom: 1rem;
}
.ds-quote {
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.3;
  color: var(--ds-black);
  letter-spacing: -0.015em;
  margin: 0 0 2rem;
}

/* ---------- 16. CTA ---------- */
.ds-cta {
  background: var(--ds-orange);
  color: var(--ds-white);
  padding: var(--ds-section-pad) 0;
  position: relative;
  overflow: hidden;
}
.ds-cta-bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 90% 20%, rgba(255,255,255,0.12), transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(0,0,0,0.08), transparent 45%);
  pointer-events: none;
}
.ds-cta-title {
  font-family: var(--ds-font);
  font-weight: 700;
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  color: var(--ds-white);
  margin: 0 0 0.75rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.ds-cta-sub {
  color: rgba(255,255,255,0.9);
  font-size: 1.15rem;
  margin: 0;
}

/* ---------- 17. Contact ---------- */
.ds-form {
  background: var(--ds-white);
  border: 1px solid var(--ds-gray-200);
  border-radius: var(--ds-radius-lg);
  padding: 2rem;
  box-shadow: var(--ds-shadow-sm);
}
.ds-form .form-label {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ds-black);
  margin-bottom: 0.4rem;
}
.ds-form .form-control {
  border: 1.5px solid var(--ds-gray-200);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  font-size: 0.95rem;
  background: var(--ds-white);
  transition: border-color var(--ds-transition-fast), box-shadow var(--ds-transition-fast);
}
.ds-form .form-control:focus {
  border-color: var(--ds-orange);
  box-shadow: 0 0 0 4px rgba(255,121,0,0.12);
  outline: none;
}

.ds-form .form-control.is-invalid {
  border-color: #dc3545;
  background-image: none;
}
.ds-form .invalid-feedback { font-size: 0.82rem; }

.ds-form-status {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
}
.ds-form-status.is-success {
  display: block;
  background: rgba(25,135,84,0.08);
  color: #0f5132;
  border: 1px solid rgba(25,135,84,0.2);
}
.ds-form-status.is-error {
  display: block;
  background: rgba(220,53,69,0.08);
  color: #842029;
  border: 1px solid rgba(220,53,69,0.2);
}

.ds-contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.ds-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}
.ds-contact-item > i {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--ds-gray-100);
  color: var(--ds-orange);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}
.ds-contact-item > div { display: flex; flex-direction: column; }
.ds-contact-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ds-text-muted);
  font-weight: 500;
}
.ds-contact-value {
  font-weight: 500;
  color: var(--ds-black);
  font-size: 1rem;
}
a.ds-contact-value:hover { color: var(--ds-orange); }

/* ---------- 18. Footer ---------- */
.ds-footer {
  background: var(--ds-black);
  color: rgba(255,255,255,0.75);
  padding: 4rem 0 2rem;
}
.ds-footer-tagline {
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}
.ds-footer-title {
  font-family: var(--ds-font);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ds-white);
  margin-bottom: 1rem;
}
.ds-footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.ds-footer-list a {
  color: rgba(255,255,255,0.65);
  font-size: 0.92rem;
  transition: color var(--ds-transition-fast);
}
.ds-footer-list a:hover { color: var(--ds-orange); }
.ds-footer-list li i { color: var(--ds-orange); }
.ds-footer-note { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.ds-footer-note strong { color: var(--ds-white); }

.ds-footer-divider {
  border-color: rgba(255,255,255,0.1);
  margin: 3rem 0 1.5rem;
}
.ds-footer-copy,
.ds-footer-meta { color: rgba(255,255,255,0.55); font-size: 0.85rem; }

.ds-social {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  color: var(--ds-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  transition: background var(--ds-transition), color var(--ds-transition), transform var(--ds-transition);
  border: 1px solid rgba(255,255,255,0.08);
}
.ds-social:hover {
  background: var(--ds-orange);
  color: var(--ds-white);
  transform: translateY(-2px);
  border-color: var(--ds-orange);
}

/* ---------- 19. Back-to-top ---------- */
.ds-back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ds-black);
  color: var(--ds-white);
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--ds-transition), transform var(--ds-transition), background var(--ds-transition);
  box-shadow: 0 8px 20px rgba(17,17,17,0.2);
  z-index: 900;
}
.ds-back-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.ds-back-top:hover { background: var(--ds-orange); }
.ds-back-top:focus-visible { outline: 2px solid var(--ds-orange); outline-offset: 3px; }

/* ---------- 20. Reveal (scroll animation) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--ds-transition-slow), transform var(--ds-transition-slow);
  will-change: transform, opacity;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 21. Responsive tweaks ---------- */
@media (max-width: 991.98px) {
  .ds-hero { padding-top: calc(var(--ds-section-pad) + 3rem); }
  .ds-hero-visual { margin-top: 2rem; }
}

@media (max-width: 767.98px) {
  html { scroll-padding-top: 76px; }
  .ds-h1 { font-size: clamp(2rem, 9vw, 2.75rem); }
  .ds-h2 { font-size: clamp(1.6rem, 6vw, 2rem); }
  .ds-lead { font-size: 1rem; }
  .ds-form { padding: 1.5rem; }
  .ds-cta { text-align: center; }
  .ds-cta .text-lg-end { text-align: center !important; }
  .ds-hero-caption { position: static; margin-top: 1rem; }
}

@media (max-width: 480px) {
  .ds-service-card, .ds-tech-card, .ds-principle { padding: 1.5rem 1.25rem; }
  .btn { padding: 0.7rem 1.25rem; font-size: 0.95rem; }
  .ds-back-top { width: 42px; height: 42px; right: 1rem; bottom: 1rem; }
}

/* ---------- 22. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .signal-dot, .signal-flow { display: none; }
  .pulse-ring, .pulse-dot, .circuit-line, .node-group circle { animation: none; }
}

/* ---------- 23. Focus states ---------- */
a:focus-visible, button:focus-visible, .nav-link:focus-visible, .form-control:focus-visible {
  outline: 2px solid var(--ds-orange);
  outline-offset: 2px;
  border-radius: 6px;
}
.form-control:focus-visible { outline: none; }

/* ---------- 24. Utilities ---------- */
.w-sm-auto { width: 100%; }
@media (min-width: 576px) { .w-sm-auto { width: auto; } }