/* ==========================================================================
   DAS Landing Page — Professional, education-sector design
   Single stylesheet. All classes namespaced `das-`.
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

:root {
  /* Brand */
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #6366f1;
  --primary-soft: #eef2ff;
  --secondary: #0ea5e9;
  --accent: #10b981;
  --accent-warm: #f59e0b;
  --danger: #ef4444;
  --violet: #8b5cf6;
  --pink: #ec4899;

  /* Neutrals */
  --dark: #0f172a;
  --dark-2: #1e293b;
  --gray-900: #111827;
  --gray-700: #334155;
  --gray-600: #475569;
  --gray-500: #64748b;
  --gray-400: #94a3b8;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;

  /* Surfaces */
  --bg-light: #f9fafb;
  --bg-mesh: radial-gradient(at 20% 10%, rgba(99, 102, 241, 0.12) 0, transparent 50%),
    radial-gradient(at 80% 0%, rgba(14, 165, 233, 0.10) 0, transparent 50%),
    radial-gradient(at 40% 100%, rgba(16, 185, 129, 0.08) 0, transparent 55%);

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 40px rgba(15, 23, 42, 0.10);
  --shadow-xl: 0 30px 60px -15px rgba(15, 23, 42, 0.18);
  --shadow-primary: 0 16px 40px -12px rgba(79, 70, 229, 0.45);
  --shadow-hover: 0 24px 60px -18px rgba(15, 23, 42, 0.22);

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --grad-primary-2: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --grad-hero: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 55%, #0ea5e9 100%);
  --grad-banner: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #3b82f6 100%);

  /* Timing */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Layout */
  --container: 1200px;
  --nav-h: 72px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--white);
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.das-landing {
  min-height: 100vh;
  background: var(--white);
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: transparent;
}

h1, h2, h3, h4 {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--dark);
}

::selection {
  background: rgba(99, 102, 241, 0.2);
  color: var(--dark);
}

/* ==========================================================================
   Animation keyframes
   ========================================================================== */

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-40px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes zoomIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes slideInUp {
  from { opacity: 0; transform: translateY(60%); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes bounceIn {
  0%   { opacity: 0; transform: scale(0.3); }
  50%  { transform: scale(1.05); }
  70%  { transform: scale(0.9); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes flipIn {
  from { opacity: 0; transform: perspective(600px) rotateY(90deg); }
  to   { opacity: 1; transform: perspective(600px) rotateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0) translateX(0); }
  50%      { transform: translateY(-10px) translateX(6px); }
}
@keyframes floatMockup {
  0%, 100% { transform: perspective(1000px) rotateY(-6deg) rotateX(3deg) translateY(0); }
  50%      { transform: perspective(1000px) rotateY(-6deg) rotateX(3deg) translateY(-10px); }
}
@keyframes floatObe {
  0%, 100% { transform: rotateY(-5deg) rotateX(4deg) translateY(0); }
  50%      { transform: rotateY(-5deg) rotateX(4deg) translateY(-8px); }
}
@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  50%      { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}
@keyframes blobDrift {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(40px, -30px) scale(1.1); }
  66%  { transform: translate(-20px, 20px) scale(0.95); }
  100% { transform: translate(0, 0) scale(1); }
}
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@keyframes barGrow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes shine {
  0%   { transform: translateX(-120%) skewX(-20deg); }
  100% { transform: translateX(220%) skewX(-20deg); }
}

/* Scroll-reveal animation runner */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: none;
  will-change: opacity, transform;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.animate-on-scroll.visible.fadeInUp   { animation: fadeInUp 0.8s var(--ease-out) both; }
.animate-on-scroll.visible.fadeInDown { animation: fadeInDown 0.8s var(--ease-out) both; }
.animate-on-scroll.visible.fadeInLeft { animation: fadeInLeft 0.8s var(--ease-out) both; }
.animate-on-scroll.visible.fadeInRight{ animation: fadeInRight 0.8s var(--ease-out) both; }
.animate-on-scroll.visible.zoomIn     { animation: zoomIn 0.8s var(--ease-out) both; }
.animate-on-scroll.visible.slideInUp  { animation: slideInUp 0.8s var(--ease-out) both; }
.animate-on-scroll.visible.bounceIn   { animation: bounceIn 0.9s var(--ease-out) both; }
.animate-on-scroll.visible.flipIn     { animation: flipIn 0.9s var(--ease-out) both; }

.animate-delay-1 { animation-delay: 0.15s !important; }
.animate-delay-2 { animation-delay: 0.30s !important; }
.animate-delay-3 { animation-delay: 0.45s !important; }
.animate-delay-4 { animation-delay: 0.60s !important; }

/* ==========================================================================
   Scroll progress bar
   ========================================================================== */
.das-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 1000;
  transition: transform 0.1s linear;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.das-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  z-index: 900;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.das-nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.das-nav-inner {
  max-width: var(--container);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.das-nav-spacer {
  height: var(--nav-h);
}

.das-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--dark);
}
.das-logo-mark {
  width: 34px;
  height: 34px;
  display: inline-block;
  filter: drop-shadow(0 4px 10px rgba(99, 102, 241, 0.35));
}
.das-logo-mark svg,
.das-logo-mark img { width: 100%; height: 100%; }
.das-logo-img {
  height: 56px;
  width: auto;
  display: block;
}
.das-logo-text {
  background: var(--grad-primary-2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 0.12em;
}

.das-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  position: relative;
}
.das-nav-slider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  background: var(--primary-soft);
  border-radius: 999px;
  transform: translateX(0);
  transition: transform 0.3s linear, width 0.3s linear;
  pointer-events: none;
  z-index: 0;
}
.das-nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: 999px;
  position: relative;
  z-index: 1;
  transition: color 0.2s var(--ease);
}
.das-nav-link:hover { color: var(--primary); }
.das-nav-link.active { color: var(--primary); }

.das-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.das-mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  color: var(--dark);
  background: var(--gray-100);
  align-items: center;
  justify-content: center;
}
.das-mobile-toggle svg { width: 22px; height: 22px; }

.das-mobile-menu-open {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--white);
  padding: 20px 24px 24px;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  z-index: 800;
  animation: fadeInDown 0.3s var(--ease-out) both;
}
.das-mobile-menu-open a:not(.das-btn) {
  display: block;
  padding: 12px 4px;
  color: var(--gray-700);
  font-weight: 500;
  border-bottom: 1px solid var(--gray-100);
}
.das-mobile-menu-open a:not(.das-btn):hover { color: var(--primary); }

/* ==========================================================================
   Buttons
   ========================================================================== */
.das-btn {
  --btn-fs: 0.925rem;
  --btn-pad-y: 11px;
  --btn-pad-x: 20px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font-size: var(--btn-fs);
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
  white-space: nowrap;
  overflow: hidden;
  isolation: isolate;
}
.das-btn svg { flex-shrink: 0; }

.das-btn-lg {
  --btn-fs: 1rem;
  --btn-pad-y: 14px;
  --btn-pad-x: 26px;
}

.das-btn-primary {
  background: var(--grad-primary-2);
  color: var(--white);
  box-shadow: var(--shadow-primary);
}
.das-btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: translateX(-120%) skewX(-20deg);
  pointer-events: none;
  z-index: -1;
}
.das-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 45px -10px rgba(79, 70, 229, 0.55);
}
.das-btn-primary:hover::before { animation: shine 0.9s var(--ease-out) forwards; }

.das-btn-secondary {
  background: var(--white);
  color: var(--dark);
  border: 1.5px solid var(--gray-200);
  box-shadow: var(--shadow-xs);
}
.das-btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.das-btn-ghost {
  background: transparent;
  color: var(--gray-700);
}
.das-btn-ghost:hover { background: var(--gray-100); color: var(--dark); }

.das-btn-white {
  background: var(--white);
  color: var(--primary-dark);
}
.das-btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.2);
}

.das-btn-outline-white {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.35);
}
.das-btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
}

/* ==========================================================================
   Section header & utilities
   ========================================================================== */
.das-section-header {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
  padding: 0 24px;
}
.das-section-header h2 {
  font-size: clamp(1.875rem, 3.5vw + 1rem, 2.75rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.das-section-header p {
  font-size: 1.05rem;
  color: var(--gray-500);
  line-height: 1.65;
}

.das-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  margin-bottom: 16px;
}
.das-eyebrow-light {
  color: rgba(255,255,255,0.95);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
}

.das-gradient-text {
  background: var(--grad-primary);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 6s linear infinite;
}
.das-gradient-text-light {
  background: linear-gradient(90deg, #fff, #c4b5fd, #fff);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 6s linear infinite;
}

.das-check-icon {
  flex-shrink: 0;
  display: inline-flex;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent);
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.das-hero {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 24px clamp(64px, 9vw, 120px);
  overflow: hidden;
  isolation: isolate;
}
.das-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 400px at 70% -10%, rgba(99,102,241,0.08), transparent 70%),
    radial-gradient(900px 360px at 10% 110%, rgba(14,165,233,0.06), transparent 70%);
  pointer-events: none;
}
.das-hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(15, 23, 42, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5) 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5) 0%, transparent 70%);
  opacity: 0.7;
}
.das-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
  animation: blobDrift 18s ease-in-out infinite;
}
.das-blob-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(99,102,241,0.45), rgba(99,102,241,0));
  top: -120px; left: -160px;
}
.das-blob-2 {
  width: 460px; height: 460px;
  background: radial-gradient(circle, rgba(236,72,153,0.35), rgba(236,72,153,0));
  top: 10%; right: -180px;
  animation-delay: -6s;
}
.das-blob-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(14,165,233,0.35), rgba(14,165,233,0));
  bottom: -160px; left: 30%;
  animation-delay: -12s;
}

.das-hero-grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.das-hero-content {
  animation: fadeInUp 0.9s var(--ease-out) both;
}
.das-hero-content h1 {
  font-size: clamp(2.25rem, 4.5vw + 0.5rem, 3.75rem);
  font-weight: 800;
  line-height: 1.08;
  margin: 16px 0 20px;
}
.das-hero-lead {
  font-size: clamp(1rem, 0.5vw + 0.95rem, 1.15rem);
  color: var(--gray-600);
  max-width: 560px;
  margin-bottom: 28px;
}

.das-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.18);
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
}
.das-badge-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulseDot 2s infinite;
}
.das-badge-pulse { animation: fadeInDown 0.7s var(--ease-out) both; }

.das-checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}
.das-check-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--gray-700);
  font-weight: 500;
}

.das-hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.das-hero-trust {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-200);
  max-width: 500px;
}
.das-avatar-stack {
  display: flex;
  align-items: center;
}
.das-uni-thumb {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid white;
  box-shadow: 0 2px 8px rgba(15,23,42,0.12);
  margin-left: -8px;
}
.das-uni-thumb:first-child { margin-left: 0; }
.das-uni-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  padding: 4px;
}
.das-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 0.75rem;
  margin-left: -10px;
}
.das-avatar:first-child { margin-left: 0; }
.das-trust-rating {
  display: flex;
  align-items: center;
  gap: 2px;
  color: var(--dark);
  font-size: 0.875rem;
  font-weight: 600;
}
.das-trust-rating strong { margin-left: 6px; }
.das-trust-sub {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* Hero visual / mockup */
.das-hero-visual {
  position: relative;
  animation: fadeInRight 1s var(--ease-out) both;
  animation-delay: 0.15s;
}
.das-hero-image { position: relative; }
.das-mockup {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: perspective(1000px) rotateY(-6deg) rotateX(3deg);
  transition: transform 0.5s var(--ease);
  animation: floatMockup 7s ease-in-out infinite;
}
.das-mockup:hover {
  transform: perspective(1000px) rotateY(-3deg) rotateX(1deg);
  animation-play-state: paused;
}
.das-mockup-bar {
  display: flex;
  gap: 6px;
  padding: 12px 14px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-100);
}
.das-mockup-bar span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--gray-300);
}
.das-mockup-bar span:nth-child(1) { background: #ff5f57; }
.das-mockup-bar span:nth-child(2) { background: #febc2e; }
.das-mockup-bar span:nth-child(3) { background: #28c840; }
.das-mockup img { width: 100%; }

.das-float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  animation: floatSlow 5s ease-in-out infinite;
}
.das-float-card-1 { top: 8%; left: -40px; animation-delay: -1s; }
.das-float-card-2 { bottom: 18%; left: -60px; animation-delay: -2s; }
.das-float-card-3 { top: 30%; right: -50px; animation-delay: -3s; }

.das-float-icon {
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  flex-shrink: 0;
}
.das-float-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--dark);
}
.das-float-sub {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 2px;
}
.das-float-bar {
  width: 120px;
  height: 4px;
  background: var(--gray-100);
  border-radius: 999px;
  margin: 4px 0 3px;
  overflow: hidden;
}
.das-float-bar span {
  display: block;
  height: 100%;
  background: var(--grad-primary-2);
  border-radius: 999px;
}

/* ==========================================================================
   University trust strip
   ========================================================================== */
.das-logos {
  padding: 52px 24px 44px;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-100);
  border-bottom: 1px solid var(--gray-100);
}
.das-logos-label {
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gray-400);
  margin-bottom: 36px;
  font-weight: 600;
  text-transform: uppercase;
}
.das-logos-marquee {
  overflow: hidden;
  position: relative;
}
.das-logos-marquee::before,
.das-logos-marquee::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 100px;
  z-index: 1;
  pointer-events: none;
}
.das-logos-marquee::before {
  left: 0;
  background: linear-gradient(to right, var(--gray-50), transparent);
}
.das-logos-marquee::after {
  right: 0;
  background: linear-gradient(to left, var(--gray-50), transparent);
}
.das-logos-track {
  display: flex;
  width: max-content;
  animation: marquee 36s linear infinite;
  padding: 4px 0 8px;
}
.das-logos-marquee:hover .das-logos-track { animation-play-state: paused; }
.das-logo-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  padding: 12px 20px 12px 14px;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  width: 240px;
  flex-shrink: 0;
  margin-right: 14px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  cursor: pointer;
}
.das-logo-card:hover {
  border-color: rgba(99,102,241,0.25);
  box-shadow: var(--shadow-md);
}
.das-logo-card-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}
.das-logo-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
}
.das-logo-card-icon img {
  height: 61px;
  width: auto;
  display: block;
  margin-top: -7px;
}
.das-logo-card-name {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--dark-2);
  line-height: 1.2;
}
.das-logo-card-city {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  margin-top: 2px;
}

/* ==========================================================================
   Stats
   ========================================================================== */
.das-stats {
  padding: 80px 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.das-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.das-stat-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.das-stat-item::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.4s var(--ease);
}
.das-stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-soft);
}
.das-stat-item:hover::before { transform: scaleX(1); }
.das-stat-item h3 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  background: var(--grad-primary-2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 6px;
}
.das-stat-item p {
  color: var(--gray-600);
  font-weight: 500;
  font-size: 0.925rem;
}

/* ==========================================================================
   How it works
   ========================================================================== */
.das-how {
  padding: clamp(64px, 8vw, 96px) 24px;
  background: var(--gray-50);
}
.das-how-track {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}
.das-how-line {
  position: absolute;
  top: 50px;
  left: 10%; right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-light), var(--primary-light), transparent);
  opacity: 0.35;
  z-index: 0;
}
.das-how-step {
  position: relative;
  background: var(--white);
  padding: 32px 22px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  text-align: center;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.das-how-step::before {
  content: attr(data-step);
  position: absolute;
  top: -8px;
  right: 10px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 4.5rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.06;
  line-height: 1;
  pointer-events: none;
  letter-spacing: -0.04em;
}
.das-how-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(99,102,241,0.3);
}
.das-how-step:hover::before { opacity: 0.1; }
/* Step number pill — now sits below icon */
.das-how-num {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.das-how-icon {
  width: 56px; height: 56px;
  margin: 0 auto 12px;
  border-radius: 16px;
  background: var(--grad-primary-2);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary);
  position: relative;
  z-index: 1;
  transition: transform 0.3s var(--ease);
}
.das-how-step:hover .das-how-icon { transform: scale(1.08); }
.das-how-icon svg { width: 26px; height: 26px; }
.das-how-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  position: relative;
  z-index: 1;
}
.das-how-step p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.55;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Features
   ========================================================================== */
.das-services {
  padding: clamp(64px, 8vw, 96px) 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.das-services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.das-service-card {
  position: relative;
  padding: 32px 22px 40px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
  overflow: hidden;
  transform-style: preserve-3d;
  text-align: center;
}
.das-service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.05), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  pointer-events: none;
}
.das-service-card:hover {
  border-color: rgba(99,102,241,0.2);
  box-shadow: var(--shadow-hover);
}
.das-service-card:hover::before { opacity: 1; }

.das-service-num {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gray-400);
  transition: color 0.3s var(--ease);
}
.das-service-card:hover .das-service-num { color: var(--gray-500); }
.das-service-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--icon-bg, var(--primary-soft));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  transition: transform 0.3s var(--ease);
}
.das-service-card:hover .das-service-icon { transform: scale(1.08) rotate(-4deg); }
.das-service-icon svg { width: 22px; height: 22px; }
.das-service-card h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}
.das-service-card p {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.6;
}
.das-card-arrow {
  position: absolute;
  left: 50%; bottom: 16px;
  color: var(--primary);
  opacity: 0;
  transform: translate(-50%, 6px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.das-service-card:hover .das-card-arrow {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ==========================================================================
   OBE Spotlight
   ========================================================================== */
.das-obe {
  position: relative;
  padding: clamp(72px, 9vw, 120px) 24px;
  background: var(--grad-hero);
  color: var(--white);
  overflow: hidden;
  isolation: isolate;
}
.das-obe-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.08), transparent 40%);
  pointer-events: none;
}
.das-obe::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5) 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}
.das-obe-grid {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.das-obe-content h2 {
  font-size: clamp(1.875rem, 3.5vw + 0.5rem, 2.75rem);
  font-weight: 800;
  color: var(--white);
  margin: 14px 0 16px;
}
.das-obe-lead {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 24px;
  line-height: 1.6;
}
.das-obe-list {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.das-obe-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.das-obe-list .das-check-icon {
  background: rgba(255,255,255,0.18);
  color: var(--white);
  margin-top: 2px;
}
.das-obe-list strong {
  display: block;
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 4px;
}
.das-obe-list p {
  color: rgba(255,255,255,0.78);
  font-size: 0.925rem;
  line-height: 1.55;
}

.das-obe-visual { perspective: 1200px; }
.das-obe-card {
  background: var(--white);
  color: var(--dark);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: 0 40px 80px -20px rgba(0,0,0,0.4);
  transform: rotateY(-5deg) rotateX(4deg);
  animation: floatObe 8s ease-in-out infinite;
}
.das-obe-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}
.das-obe-card-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--dark);
}
.das-obe-card-sub {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 2px;
}
.das-obe-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.das-obe-bars {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 18px;
}
.das-obe-bar-row {
  display: grid;
  grid-template-columns: 145px 1fr 44px;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray-700);
}
.das-obe-bar-label {
  white-space: nowrap;
}
.das-obe-bar {
  height: 8px;
  background: var(--gray-100);
  border-radius: 999px;
  overflow: hidden;
}
.das-obe-bar span {
  display: block;
  height: 100%;
  width: var(--w);
  background: var(--c, var(--primary));
  border-radius: 999px;
  transform-origin: 0 50%;
  animation: barGrow 1.4s var(--ease-out) both;
}
.das-obe-bar-val {
  text-align: right;
  font-weight: 700;
  color: var(--dark);
}
.das-obe-card-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
  font-size: 0.85rem;
  color: var(--gray-600);
}
.das-obe-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ==========================================================================
   Solutions (tabs)
   ========================================================================== */
.das-solutions {
  padding: clamp(72px, 9vw, 120px) 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.das-tabs {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 8px;
  padding: 6px;
  background: var(--gray-100);
  border-radius: 999px;
  max-width: max-content;
  margin: 0 auto 48px;
  position: relative;
}
.das-tab-slider {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 0;
  width: 0;
  background: var(--white);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transform: translateX(0);
  transition: transform 0.4s linear, width 0.4s linear;
  pointer-events: none;
  z-index: 0;
}
.das-tab {
  display: inline-flex;
  align-items: center;
  position: relative;
  z-index: 1;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--gray-600);
  border-radius: 999px;
  transition: color 0.25s linear;
}
.das-tab:hover { color: var(--primary); }
.das-tab.active {
  color: var(--primary);
}
.das-tab svg { width: 18px; height: 18px; }

.das-tab-panel {
  display: none;
  animation: fadeInUp 0.5s var(--ease-out) both;
}
.das-tab-panel.active { display: block; }

.das-solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.das-solution-feature {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.das-solution-feature:hover {
  border-color: var(--primary-soft);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.das-solution-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--grad-primary-2);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-primary);
}
.das-solution-feature h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.das-solution-feature p {
  font-size: 0.925rem;
  color: var(--gray-600);
  line-height: 1.55;
}

/* ==========================================================================
   Comparison
   ========================================================================== */
.das-compare {
  padding: clamp(64px, 8vw, 96px) 24px;
  background: var(--gray-50);
}
.das-compare-grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.das-compare-col {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--gray-200);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.das-compare-col:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.das-compare-new {
  background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 100%);
  border-color: rgba(99,102,241,0.2);
  position: relative;
  overflow: hidden;
}
.das-compare-new::after {
  content: "";
  position: absolute;
  top: -50%; right: -30%;
  width: 250px; height: 250px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.15), transparent 70%);
  pointer-events: none;
}
.das-compare-tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-500);
  background: var(--gray-100);
  border-radius: 999px;
  margin-bottom: 14px;
}
.das-compare-tag-new {
  color: var(--white);
  background: var(--grad-primary-2);
}
.das-compare-col h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.das-compare-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.das-compare-col li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.95rem;
  color: var(--gray-700);
  line-height: 1.5;
}
.das-compare-x,
.das-compare-check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}
.das-compare-x {
  background: rgba(239,68,68,0.12);
  color: var(--danger);
}
.das-compare-check {
  background: rgba(16,185,129,0.15);
  color: var(--accent);
}

/* ==========================================================================
   Benefits
   ========================================================================== */
.das-benefits {
  padding: clamp(64px, 8vw, 96px) 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.das-benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.das-benefit-item {
  position: relative;
  padding: 32px 24px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  overflow: hidden;
}
.das-benefit-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.das-benefit-item::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(79,70,229,0.04), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}
.das-benefit-item:hover::after { opacity: 1; }
.das-benefit-number {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.25rem;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 8px;
}
.das-benefit-item h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.das-benefit-item p {
  font-size: 0.925rem;
  color: var(--gray-600);
  line-height: 1.55;
}

/* ==========================================================================
   Testimonials
   ========================================================================== */
.das-testimonials {
  padding: clamp(64px, 8vw, 96px) 24px;
  background: var(--gray-50);
}
.das-testimonials-grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 560px));
  justify-content: center;
  gap: 22px;
}
.das-testimonial-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px 28px 28px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.das-testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.das-quote-mark {
  position: absolute;
  top: 10px; left: 20px;
  font-family: Georgia, serif;
  font-size: 4rem;
  line-height: 1;
  color: rgba(99,102,241,0.18);
  font-weight: 800;
}
.das-testimonial-card p {
  color: var(--gray-700);
  line-height: 1.65;
  font-size: 0.95rem;
  margin-bottom: 20px;
  text-align: center;
}
.das-testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--gray-100);
}
.das-testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.925rem;
}
.das-testimonial-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
}
.das-testimonial-info p {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin: 0;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.das-banner {
  position: relative;
  padding: clamp(64px, 8vw, 100px) 24px;
  overflow: hidden;
  isolation: isolate;
}
.das-banner-bg {
  position: absolute;
  inset: 24px;
  border-radius: var(--radius-xl);
  background: var(--grad-banner);
  overflow: hidden;
  z-index: -1;
}
.das-banner-bg::before,
.das-banner-bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}
.das-banner-bg::before {
  width: 400px; height: 400px;
  background: rgba(236,72,153,0.22);
  top: -100px; left: -100px;
  animation: blobDrift 14s ease-in-out infinite;
}
.das-banner-bg::after {
  width: 360px; height: 360px;
  background: rgba(14,165,233,0.22);
  bottom: -120px; right: -100px;
  animation: blobDrift 16s ease-in-out infinite reverse;
}
.das-banner-inner {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 24px;
  text-align: center;
  color: var(--white);
}
.das-banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 0.8125rem;
  font-weight: 600;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  margin-bottom: 20px;
}
.das-banner-inner h2 {
  color: var(--white);
  font-size: clamp(1.75rem, 3.5vw + 0.5rem, 2.5rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.das-banner-inner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  margin-bottom: 28px;
}
.das-banner-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   Contact + FAQ
   ========================================================================== */
.das-contact {
  padding: clamp(64px, 8vw, 96px) 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.das-contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: flex-start;
}
.das-contact-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.das-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.das-form-group {
  margin-bottom: 18px;
}
.das-form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.das-form-group input,
.das-form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: 10px;
  background: var(--white);
  color: var(--dark);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.das-form-group input:focus,
.das-form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(99,102,241,0.15);
}
.das-form-group textarea {
  resize: vertical;
  min-height: 110px;
}
.das-form-submit {
  margin-top: 8px;
}
.das-form-submit .das-btn { width: 100%; }

.das-alert {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 14px;
}
.das-alert.success {
  background: rgba(16,185,129,0.1);
  color: #047857;
  border: 1px solid rgba(16,185,129,0.25);
}
.das-alert.error {
  background: rgba(239,68,68,0.08);
  color: #b91c1c;
  border: 1px solid rgba(239,68,68,0.25);
}
.das-spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: var(--white);
  border-radius: 50%;
  display: inline-block;
  animation: spin 0.7s linear infinite;
  margin-right: 6px;
}

.das-req {
  color: var(--danger);
  margin-left: 1px;
}

.das-field-error {
  display: none;
  font-size: 0.8rem;
  color: #b91c1c;
  margin-top: 5px;
  font-weight: 500;
}

.das-form-group.has-error .das-field-error {
  display: block;
}

.das-form-group.has-error label {
  color: #b91c1c;
}

.das-form-group.has-error input,
.das-form-group.has-error textarea {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.das-faq h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.das-faq-sub {
  color: var(--gray-500);
  margin-bottom: 20px;
}
.das-faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.das-faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.das-faq-item.open {
  border-color: var(--primary-soft);
  box-shadow: var(--shadow-sm);
}
.das-faq-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
}
.faq-icon {
  color: var(--primary);
  transition: transform 0.3s var(--ease);
  flex-shrink: 0;
}
.das-faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.das-faq-answer > div {
  padding: 0 18px 18px;
  font-size: 0.925rem;
  color: var(--gray-600);
  line-height: 1.6;
  animation: fadeInUp 0.35s var(--ease-out) both;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.das-footer {
  background: var(--dark);
  color: var(--gray-300);
  padding: 64px 24px 28px;
}
.das-footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.das-footer-brand p {
  margin-top: 14px;
  font-size: 0.925rem;
  color: var(--gray-400);
  line-height: 1.65;
  max-width: 360px;
}
.das-logo-light .das-logo-text {
  background: linear-gradient(135deg, #fff, #c4b5fd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.das-footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.das-footer-col a {
  display: block;
  font-size: 0.925rem;
  color: var(--gray-400);
  padding: 6px 0;
  transition: color 0.2s var(--ease);
}
.das-footer-col a:hover { color: var(--white); }

.das-footer-bottom {
  max-width: var(--container);
  margin: 28px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--gray-500);
  flex-wrap: wrap;
  gap: 12px;
}
.das-footer-links {
  display: flex;
  gap: 20px;
}
.das-footer-links a { color: var(--gray-500); transition: color 0.2s var(--ease); }
.das-footer-links a:hover { color: var(--white); }

/* ==========================================================================
   Back to top
   ========================================================================== */
.das-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--grad-primary-2);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s var(--ease);
  z-index: 500;
}
.das-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.das-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 50px -10px rgba(79,70,229,0.6);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .das-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .das-hero-visual { max-width: 560px; margin: 0 auto; }
  .das-float-card-1 { left: 0; }
  .das-float-card-2 { left: 0; }
  .das-float-card-3 { right: 0; }
  .das-services-grid { grid-template-columns: repeat(2, 1fr); }
  .das-how-track { grid-template-columns: repeat(3, 1fr); }
  .das-how-line { display: none; }
  .das-benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .das-testimonials-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 560px)); }
  .das-obe-grid { grid-template-columns: 1fr; gap: 40px; }
  .das-obe-visual { max-width: 520px; margin: 0 auto; }
  .das-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .das-footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .das-nav-links,
  .das-nav-cta { display: none; }
  .das-mobile-toggle { display: inline-flex; }
  .das-hero { padding: 32px 20px 64px; }
  .das-contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .das-compare-grid { grid-template-columns: 1fr; }
  .das-solution-grid { grid-template-columns: 1fr; }
  .das-services-grid { grid-template-columns: 1fr; }
  .das-testimonials-grid { grid-template-columns: 1fr; }
  .das-benefits-grid { grid-template-columns: 1fr 1fr; }
  .das-how-track { grid-template-columns: 1fr 1fr; }
  .das-mockup { transform: none; animation: none; }
  .das-obe-card { transform: none; animation: none; }
  .das-float-card { display: none; }
  .das-float-card-2 { display: flex; bottom: -30px; left: 10px; }
  .das-footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 560px) {
  .das-stats-grid { grid-template-columns: 1fr 1fr; }
  .das-benefits-grid { grid-template-columns: 1fr; }
  .das-how-track { grid-template-columns: 1fr; }
  .das-tabs { width: 100%; overflow-x: auto; justify-content: flex-start; }
  .das-tab { white-space: nowrap; padding: 10px 16px; font-size: 0.875rem; }
  .das-tab-label { display: none; }
  .das-tab.active .das-tab-label { display: inline; }
  .das-form-row { grid-template-columns: 1fr; }
  .das-footer-inner { grid-template-columns: 1fr; }
  .das-banner-bg { inset: 12px; }
  .das-contact-form { padding: 22px; }
  .das-hero-buttons .das-btn { flex: 1; }
  .das-obe-bar-row { grid-template-columns: 115px 1fr 38px; gap: 8px; font-size: 0.75rem; }
}

@media (max-width: 400px) {
  .das-hero-content h1 { font-size: 2rem; }
  .das-hero-trust { flex-direction: column; align-items: flex-start; }
}

/* ==========================================================================
   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;
  }
  .animate-on-scroll { opacity: 1 !important; transform: none !important; }
  .das-blob,
  .das-mockup,
  .das-float-card,
  .das-obe-card { animation: none !important; }
}