:root {
    --iui-bg: #020617;
    --iui-primary: #4f46e5;
    --iui-accent: #22d3ee;
    --iui-text: #e5e7eb;
    --iui-muted: #9ca3af;
    --iui-border: rgba(148, 163, 184, 0.22);
    --iui-radius-lg: 20px;
    --iui-radius-xl: 26px;
    --iui-shadow-soft: 0 22px 60px rgba(15, 23, 42, 0.72);
    --iui-shadow-glow: 0 0 40px rgba(56, 189, 248, 0.5);
  }
  
  /* BASIC RESET FOR THIS PAGE SCOPE */
  .iui-page * {
    box-sizing: border-box;
  }
  
  /* PAGE WRAPPER */
  .iui-page {
    background:
      radial-gradient(circle at top, #0f172a 0, #020617 50%, #000 100%);
    color: var(--iui-text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    padding: 4rem 1.5rem 5rem;
  }
  
  /* SECTIONS */
  .iui-section {
    max-width: 1120px;
    margin: 0 auto 4rem;
  }
  
  .iui-section-header {
    text-align: center;
    margin-bottom: 2.4rem;
  }
  
  .iui-section-header h2 {
    font-size: clamp(1.9rem, 2.3vw, 2.35rem);
    margin-bottom: 0.6rem;
  }
  
  .iui-section-header p {
    max-width: 640px;
    margin: 0 auto;
    color: var(--iui-muted);
  }
  
  /* HERO LAYOUT */
  .iui-hero {
    max-width: 1120px;
    margin: 0 auto 4rem;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
  }
  
  .iui-hero-content {
    position: relative;
  }
  
  .iui-title {
    padding-top: 45%;
    font-size: clamp(2.4rem, 4vw, 3.2rem);
    line-height: 1.1;
    margin-bottom: 1rem;
  }
  
  .iui-title span {
    display: block;
    margin-top: 0.45rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--iui-accent);
  }
  
  .iui-subtitle {
    color: var(--iui-muted);
    max-width: 580px;
    margin-bottom: 1.8rem;
  }
  
  /* CTA BUTTONS */
  .iui-hero-cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.7rem;
  }
  
  .iui-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.5rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.18s ease-out, box-shadow 0.18s ease-out,
                background 0.18s ease-out, border-color 0.18s ease-out;
  }
  
  .iui-btn.primary {
    background: linear-gradient(135deg, var(--iui-primary), var(--iui-accent));
    color: white;
    box-shadow: var(--iui-shadow-glow);
  }
  
  .iui-btn.primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 26px 60px rgba(56, 189, 248, 0.45);
  }
  
  .iui-btn.ghost {
    background: transparent;
    border-color: var(--iui-border);
    color: var(--iui-text);
  }
  
  .iui-btn.ghost:hover {
    background: rgba(15, 23, 42, 0.9);
    border-color: var(--iui-primary);
  }
  
  .iui-btn.wide {
    width: 100%;
  }
  
  /* HERO KEYPOINTS */
  .iui-keypoints {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  
  .iui-keypoint {
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--iui-border);
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.5));
    backdrop-filter: blur(16px);
  }
  
  .kp-label {
    font-size: 0.85rem;
    color: var(--iui-muted);
  }
  
  /* HERO 3D VISUAL */
  .iui-hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .iui-orbit-wrapper {
    perspective: 1400px;
  }
  
  .iui-orbit {
    position: relative;
    width: min(340px, 80vw);
    height: min(340px, 80vw);
    border-radius: 999px;
    background:
      radial-gradient(circle at 20% 0%, rgba(56, 189, 248, 0.18), transparent 60%),
      radial-gradient(circle at 80% 100%, rgba(79, 70, 229, 0.25), transparent 65%);
    box-shadow: var(--iui-shadow-soft);
    overflow: hidden;
    transform-style: preserve-3d;
    animation: iui-orbit-rotate 22s linear infinite;
  }
  
  /* UTERUS SHAPE */
  .iui-uterus {
    position: absolute;
    inset: 50%;
    width: 190px;
    height: 150px;
    transform: translate3d(-50%, -50%, 40px);
    pointer-events: none;
  }
  
  .uterus-body {
    position: absolute;
    left: 50%;
    top: 40%;
    width: 80px;
    height: 90px;
    transform: translateX(-50%);
    border-radius: 50px 50px 40px 40px;
    background: radial-gradient(circle at 30% 20%, #f9fafb, #e0f2fe 45%, #22d3ee 80%, #1d4ed8 100%);
    box-shadow: 0 0 35px rgba(56, 189, 248, 0.8);
  }
  
  .uterus-horn {
    position: absolute;
    top: 32%;
    width: 60px;
    height: 40px;
    border-radius: 30px;
    background: linear-gradient(135deg, rgba(226, 232, 240, 0.9), rgba(56, 189, 248, 0.9));
  }
  
  .uterus-horn.left {
    left: 6%;
  }
  
  .uterus-horn.right {
    right: 6%;
  }
  
  .uterus-ovary {
    position: absolute;
    top: 36%;
    width: 24px;
    height: 24px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 20%, #f9fafb, #e0f2fe 55%, #22d3ee 95%);
    box-shadow: 0 0 18px rgba(56, 189, 248, 0.85);
  }
  
  .ovary-left {
    left: 0;
  }
  
  .ovary-right {
    right: 0;
  }
  
  .uterus-label {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: rgba(226, 232, 240, 0.9);
  }
  
  /* CATHETER */
  .iui-catheter {
    position: absolute;
    bottom: -6%;
    left: 48%;
    width: 8px;
    height: 58%;
    transform: translateX(-50%) translateZ(55px);
    transform-origin: bottom center;
    animation: iui-catheter-move 4.8s ease-in-out infinite;
  }
  
  .catheter-line {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(148, 163, 184, 0.1), rgba(226, 232, 240, 0.9));
    backdrop-filter: blur(10px);
  }
  
  .catheter-tip {
    position: absolute;
    top: 16%;
    left: -4px;
    width: 16px;
    height: 8px;
    border-radius: 999px;
    background: #e5e7eb;
  }
  
  /* SPERM FLOW */
  .iui-sperm-flow {
    position: absolute;
    bottom: 4%;
    left: 50%;
    width: 70px;
    height: 150px;
    transform: translateX(-50%) translateZ(35px);
    pointer-events: none;
  }
  
  .flow-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: #e0f2fe;
    box-shadow: 0 0 14px rgba(56, 189, 248, 0.9);
  }
  
  .flow-1 { left: 20%; bottom: 8%;  animation: flowUp1 4s infinite ease-in-out; }
  .flow-2 { left: 50%; bottom: 12%; animation: flowUp2 3.6s infinite ease-in-out; }
  .flow-3 { left: 35%; bottom: 18%; animation: flowUp3 4.4s infinite ease-in-out; }
  .flow-4 { left: 60%; bottom: 10%; animation: flowUp4 3.8s infinite ease-in-out; }
  .flow-5 { left: 25%; bottom: 4%;  animation: flowUp5 4.2s infinite ease-in-out; }
  
  /* FLOATING TAGS */
  .iui-floating-tag {
    position: absolute;
    padding: 0.42rem 0.8rem;
    font-size: 0.78rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.5);
    color: var(--iui-muted);
    backdrop-filter: blur(16px);
    transform-style: preserve-3d;
    box-shadow: 0 14px 40px rgba(15, 23, 42, 0.9);
  }
  
  .iui-floating-tag.tag-prep {
    top: 12%;
    left: 10%;
    transform: translateZ(45px);
    animation: floatTag1 6s ease-in-out infinite;
  }
  
  .iui-floating-tag.tag-timing {
    top: 18%;
    right: 10%;
    transform: translateZ(60px);
    animation: floatTag2 6.4s ease-in-out infinite;
  }
  
  .iui-floating-tag.tag-catheter {
    bottom: 16%;
    left: 8%;
    transform: translateZ(50px);
    animation: floatTag3 5.6s ease-in-out infinite;
  }
  
  .iui-floating-tag.tag-insemination {
    bottom: 10%;
    right: 8%;
    transform: translateZ(40px);
    animation: floatTag4 5.8s ease-in-out infinite;
  }
  
  /* STEPS 3D CARDS */
  .iui-steps-3d {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.4rem;
    perspective: 1400px;
  }
  
  .iui-step-card {
    position: relative;
    height: 230px;
    border-radius: var(--iui-radius-lg);
    transform-style: preserve-3d;
  }
  
  .iui-step-card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
  }
  
  .iui-step-card:hover .iui-step-card-inner {
    transform: rotateY(-180deg);
  }
  
  .iui-step-card-front,
  .iui-step-card-back {
    position: absolute;
    inset: 0;
    padding: 1.1rem 1.1rem 1.3rem;
    border-radius: var(--iui-radius-lg);
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.98));
    border: 1px solid var(--iui-border);
    box-shadow: var(--iui-shadow-soft);
    backface-visibility: hidden;
  }
  
  .iui-step-card-back {
    transform: rotateY(180deg);
  }
  
  .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.1rem;
    height: 2.1rem;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.22);
    font-size: 0.8rem;
    margin-bottom: 0.7rem;
  }
  
  .iui-step-card h3 {
    font-size: 1rem;
    margin-bottom: 0.45rem;
  }
  
  .iui-step-card h4 {
    font-size: 0.96rem;
    margin-bottom: 0.45rem;
  }
  
  .iui-step-card p {
    font-size: 0.88rem;
    color: var(--iui-muted);
  }
  
  /* 3D STRIP */
  .iui-3d-strip .iui-strip-card {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 2.3rem;
    align-items: center;
    padding: 2rem;
    border-radius: var(--iui-radius-xl);
    background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.35), rgba(15, 23, 42, 0.98));
    border: 1px solid var(--iui-border);
    box-shadow: var(--iui-shadow-soft);
    overflow: hidden;
  }
  
  .iui-strip-glow {
    position: absolute;
    inset: -80px;
    background: radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.24), transparent 60%);
    opacity: 0.6;
    pointer-events: none;
  }
  
  .iui-strip-content {
    position: relative;
  }
  
  .iui-strip-content h2 {
    margin-bottom: 0.7rem;
  }
  
  .iui-strip-content p {
    margin-bottom: 0.9rem;
    color: var(--iui-muted);
  }
  
  .iui-bullets {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .iui-bullets li {
    position: relative;
    padding-left: 1.3rem;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    color: var(--iui-text);
  }
  
  .iui-bullets li::before {
    content: "";
    position: absolute;
    left: 0.25rem;
    top: 0.55rem;
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--iui-accent), var(--iui-primary));
  }
  
  /* RING STACK */
  .iui-strip-side {
    position: relative;
    display: flex;
    justify-content: center;
    perspective: 1000px;
  }
  
  .iui-ring-stack {
    position: relative;
    width: 150px;
    height: 140px;
    transform-style: preserve-3d;
    animation: ringFloat 7s ease-in-out infinite;
  }
  
  .ring-layer {
    position: absolute;
    left: 50%;
    width: 130px;
    height: 36px;
    transform: translateX(-50%);
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.9);
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 1));
    text-align: center;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .ring-1 {
    top: 10px;
    transform: translateX(-50%) translateZ(32px);
  }
  
  .ring-2 {
    top: 38px;
    transform: translateX(-50%) translateZ(16px);
    opacity: 0.9;
  }
  
  .ring-3 {
    top: 66px;
    transform: translateX(-50%) translateZ(0);
    opacity: 0.8;
  }
  
  /* STATS GRID */
  .iui-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.6rem;
  }
  
  .iui-stat-card {
    border-radius: var(--iui-radius-lg);
    padding: 1.4rem 1.3rem;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.97), rgba(15, 23, 42, 0.9));
    border: 1px solid var(--iui-border);
    box-shadow: 0 20px 55px rgba(15, 23, 42, 0.82);
    transform: translateY(0) translateZ(0);
    transition: transform 0.22s ease-out, box-shadow 0.22s ease-out, border-color 0.22s ease-out;
  }
  
  .iui-stat-card:hover {
    transform: translateY(-6px) translateZ(15px);
    border-color: rgba(79, 70, 229, 0.7);
    box-shadow: 0 26px 70px rgba(15, 23, 42, 0.92);
  }
  
  .iui-stat-card h3 {
    margin-bottom: 0.6rem;
    font-size: 1rem;
  }
  
  .iui-stat-card p {
    font-size: 0.9rem;
    color: var(--iui-muted);
  }
  
  /* CONSULT SECTION */
  .iui-consult-section .iui-consult-card {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 2.4rem;
    padding: 2.1rem;
    border-radius: var(--iui-radius-xl);
    border: 1px solid var(--iui-border);
    background: radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.16), rgba(15, 23, 42, 0.98));
    box-shadow: var(--iui-shadow-soft);
  }
  
  .iui-consult-left h2 {
    margin-bottom: 0.7rem;
  }
  
  .iui-consult-left p {
    color: var(--iui-muted);
    margin-bottom: 0.9rem;
  }
  
  .iui-consult-list {
    margin: 0;
    padding-left: 1rem;
    font-size: 0.92rem;
    color: var(--iui-text);
  }
  
  .iui-consult-list li + li {
    margin-top: 0.25rem;
  }
  
  .iui-consult-right {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .iui-consult-3d-card {
    position: relative;
    width: 100%;
    max-width: 320px;
    padding: 1.7rem 1.4rem 1.5rem;
    border-radius: 24px;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 1));
    border: 1px solid rgba(148, 163, 184, 0.7);
    box-shadow: 0 28px 70px rgba(15, 23, 42, 0.97);
    transform-style: preserve-3d;
    transform: rotateY(-14deg) rotateX(6deg) translateZ(0);
    animation: consultCardFloat 7s ease-in-out infinite;
  }
  
  .iui-consult-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.9rem;
    font-size: 0.75rem;
    border-radius: 12px;
    background: rgba(79, 70, 229, 0.3);
    border: 1px solid rgba(79, 70, 229, 0.9);
    margin-bottom: 0.7rem;
  }
  
  .iui-consult-line {
    font-size: 0.92rem;
    color: var(--iui-muted);
    margin-bottom: 1.1rem;
  }
  
  /* BOOK SECTION */
  .iui-book-section .iui-book-placeholder {
    border-radius: var(--iui-radius-lg);
    padding: 1.6rem;
    border: 1px dashed rgba(148, 163, 184, 0.7);
    background: rgba(15, 23, 42, 0.88);
    text-align: center;
    color: var(--iui-muted);
  }
  
  /* ANIMATIONS */
  @keyframes iui-orbit-rotate {
    0%   { transform: rotateX(20deg) rotateY(-18deg); }
    50%  { transform: rotateX(26deg) rotateY(22deg); }
    100% { transform: rotateX(20deg) rotateY(342deg); }
  }
  
  @keyframes iui-catheter-move {
    0%, 100% { transform: translateX(-50%) translateZ(55px) scaleY(1); }
    50%      { transform: translateX(-50%) translateZ(65px) scaleY(1.06); }
  }
  
  @keyframes flowUp1 {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(40px); }
  }
  @keyframes flowUp2 {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(46px); }
  }
  @keyframes flowUp3 {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(38px); }
  }
  @keyframes flowUp4 {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(44px); }
  }
  @keyframes flowUp5 {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(36px); }
  }
  
  @keyframes floatTag1 {
    0%, 100% { transform: translate3d(0, 0, 45px); }
    50%      { transform: translate3d(8px, -10px, 60px); }
  }
  
  @keyframes floatTag2 {
    0%, 100% { transform: translate3d(0, 0, 60px); }
    50%      { transform: translate3d(-8px, -14px, 75px); }
  }
  
  @keyframes floatTag3 {
    0%, 100% { transform: translate3d(0, 0, 50px); }
    50%      { transform: translate3d(8px, 10px, 68px); }
  }
  
  @keyframes floatTag4 {
    0%, 100% { transform: translate3d(0, 0, 40px); }
    50%      { transform: translate3d(-10px, 8px, 58px); }
  }
  
  @keyframes ringFloat {
    0%, 100% { transform: rotateX(16deg) rotateY(-16deg) translateY(0); }
    50%      { transform: rotateX(20deg) rotateY(-10deg) translateY(-10px); }
  }
  
  @keyframes consultCardFloat {
    0%, 100% {
      transform: rotateY(-14deg) rotateX(6deg) translateY(0) translateZ(0);
    }
    50% {
      transform: rotateY(-10deg) rotateX(8deg) translateY(-10px) translateZ(18px);
    }
  }
  
  /* RESPONSIVE */
  @media (max-width: 960px) {
    .iui-hero {
      grid-template-columns: minmax(0, 1fr);
    }
  
    .iui-hero-visual {
      order: -1;
    }
  
    .iui-steps-3d {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  
    .iui-3d-strip .iui-strip-card,
    .iui-consult-section .iui-consult-card {
      grid-template-columns: minmax(0, 1fr);
    }
  
    .iui-consult-3d-card {
      transform: rotateY(-8deg) rotateX(5deg);
    }
  }
  
  @media (max-width: 640px) {
    .iui-page {
      padding-inline: 1rem;
      padding-top: 3rem;
    }
  
    .iui-steps-3d {
      grid-template-columns: minmax(0, 1fr);
    }
  
    .iui-stats-grid {
      grid-template-columns: minmax(0, 1fr);
    }
  
    .iui-hero-cta-row {
      flex-direction: column;
      align-items: flex-start;
    }
  }