:root {
    --navy: #06162E;
    --navy2: #0A2444;
    --navy3: #0d2d56;
    --cyan: #22DDEB;
    --teal: #00B8C8;
    --green: #1FA355;
    --green2: #17883F;
    --green-light: #30E88F;
    --white: #FFFFFF;
    --grey: #D9E7F2;
    --grey2: #8AAFC8;
    --gold: #FFD84D;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--navy);
    color: var(--white);
    font-family: 'Barlow', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
  }

  /* ─── NAV ─── */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(6,22,46,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(34,221,235,0.15);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }

  .nav-logo img { height: 38px; display: block; }

  .nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
  }

  .nav-links a {
    color: var(--grey2);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: color 0.2s;
  }
  .nav-links a:hover { color: var(--cyan); }

  .nav-cta {
    background: linear-gradient(135deg, var(--green), var(--teal));
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: 600 !important;
  }

  @media (max-width: 768px) {
    .nav-links { display: none; }
  }

  /* ─── HERO ─── */
  #hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: 100px 24px 60px;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(10,36,68,0.9) 0%, var(--navy) 70%);
    z-index: 0;
  }

  /* animated grid */
  .hero-grid {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(34,221,235,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(34,221,235,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridScroll 20s linear infinite;
  }

  @keyframes gridScroll {
    from { background-position: 0 0; }
    to   { background-position: 60px 60px; }
  }

  /* glowing orbs */
  .orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.18;
    animation: float 8s ease-in-out infinite;
  }
  .orb-1 { width: 500px; height: 500px; background: var(--cyan); top: -100px; left: -100px; animation-delay: 0s; }
  .orb-2 { width: 400px; height: 400px; background: var(--green); bottom: -80px; right: -80px; animation-delay: 3s; }
  .orb-3 { width: 300px; height: 300px; background: var(--teal); top: 40%; left: 60%; animation-delay: 5s; }

  @keyframes float {
    0%,100% { transform: translateY(0); }
    50%      { transform: translateY(-30px); }
  }

  /* corridor route line */
  .hero-route {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 1;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 840px;
  }

  .hero-eyebrow {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--cyan);
    background: rgba(34,221,235,0.1);
    border: 1px solid rgba(34,221,235,0.3);
    padding: 6px 18px;
    border-radius: 100px;
    margin-bottom: 28px;
    animation: fadeUp 0.8s ease both;
  }

  .hero-headline {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(42px, 7vw, 82px);
    font-weight: 800;
    line-height: 1.0;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
    animation: fadeUp 0.9s 0.15s ease both;
  }

  .hero-headline span {
    background: linear-gradient(90deg, var(--cyan), var(--green-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-sub {
    font-size: clamp(16px, 2.5vw, 20px);
    color: var(--grey2);
    max-width: 620px;
    margin: 0 auto 16px;
    animation: fadeUp 1s 0.25s ease both;
  }

  .hero-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 36px;
    animation: fadeUp 1s 0.35s ease both;
  }

  .hero-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--teal);
    border: 1px solid rgba(0,184,200,0.3);
    padding: 5px 14px;
    border-radius: 100px;
  }

  .hero-btns {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeUp 1s 0.45s ease both;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--green) 0%, var(--teal) 100%);
    color: #fff;
    border: none;
    padding: 16px 36px;
    font-size: 15px;
    font-weight: 700;
    font-family: 'Barlow', sans-serif;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 24px rgba(0,184,200,0.35);
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,184,200,0.5);
  }

  .btn-secondary {
    background: transparent;
    color: var(--cyan);
    border: 1.5px solid var(--cyan);
    padding: 15px 32px;
    font-size: 15px;
    font-weight: 600;
    font-family: 'Barlow', sans-serif;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
  }
  .btn-secondary:hover {
    background: rgba(34,221,235,0.1);
    transform: translateY(-2px);
  }

  .hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--grey2);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: fadeIn 1.5s 1s ease both;
  }

  .scroll-line {
    width: 1px;
    height: 36px;
    background: linear-gradient(to bottom, var(--cyan), transparent);
    animation: scrollPulse 2s ease infinite;
  }

  @keyframes scrollPulse {
    0%,100% { opacity: 0.4; transform: scaleY(1); }
    50%      { opacity: 1; transform: scaleY(1.2); }
  }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  @keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
  }

  /* ─── SECTION WRAPPERS ─── */
  section { padding: 80px 24px; }

  .container { max-width: 1100px; margin: 0 auto; }

  .section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--cyan);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(34,221,235,0.25);
    max-width: 80px;
  }

  .section-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: 16px;
  }

  .section-title span {
    background: linear-gradient(90deg, var(--cyan), var(--green-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .section-body {
    font-size: 17px;
    color: var(--grey2);
    line-height: 1.75;
    max-width: 680px;
  }

  .divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(34,221,235,0.2), transparent);
    margin: 0 auto;
    max-width: 1100px;
  }

  /* ─── QUICK SUMMARY ─── */
  #summary {
    background: var(--navy2);
    text-align: center;
  }

  .summary-callout {
    display: inline-block;
    background: linear-gradient(135deg, rgba(31,163,85,0.12), rgba(0,184,200,0.12));
    border: 1px solid rgba(34,221,235,0.2);
    border-radius: 12px;
    padding: 32px 48px;
    margin-top: 32px;
    max-width: 800px;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(22px, 3.5vw, 32px);
    font-weight: 700;
    line-height: 1.3;
    color: var(--white);
  }

  .summary-callout em {
    font-style: normal;
    color: var(--cyan);
  }

  /* ─── WHAT IS TBP ─── */
  #what {
    background: var(--navy);
  }

  .what-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-top: 40px;
  }

  @media (max-width: 768px) {
    .what-grid { grid-template-columns: 1fr; }
  }

  .flow-diagram {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .flow-node {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(10,36,68,0.6);
    border: 1px solid rgba(34,221,235,0.15);
    border-radius: 10px;
    padding: 18px 24px;
    transition: border-color 0.25s, transform 0.25s;
  }
  .flow-node:hover {
    border-color: rgba(34,221,235,0.4);
    transform: translateX(6px);
  }

  .flow-node-icon {
    width: 44px;
    height: 44px;
    background: rgba(34,221,235,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 20px;
  }

  .flow-node-text {
    flex: 1;
  }
  .flow-node-label {
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
  }
  .flow-node-desc {
    font-size: 13px;
    color: var(--grey2);
  }

  .flow-arrow {
    display: flex;
    justify-content: center;
    padding: 4px 0;
    color: var(--cyan);
    font-size: 18px;
    opacity: 0.5;
  }

  /* ─── ASMOFP PLATFORM ─── */
  #platform {
    background: var(--navy2);
  }

  .platform-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
    margin-top: 40px;
  }
  @media (max-width: 768px) {
    .platform-grid { grid-template-columns: 1fr; }
  }

  .platform-visual {
    position: relative;
  }

  .v-platform {
    width: 100%;
    max-width: 440px;
  }

  .capability-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .cap-item {
    background: rgba(6,22,46,0.6);
    border: 1px solid rgba(34,221,235,0.12);
    border-radius: 8px;
    padding: 14px 16px;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--grey);
    transition: border-color 0.2s;
  }
  .cap-item:hover { border-color: rgba(34,221,235,0.35); }
  .cap-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--cyan);
    flex-shrink: 0;
  }

  /* ─── HYDROGEN CORRIDOR ─── */
  #corridor {
    background: var(--navy);
  }

  .corridor-flow {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 720px;
    margin: 48px auto 0;
  }

  .corridor-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
  }

  .corridor-step-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
  }

  .step-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--navy3), var(--navy2));
    border: 2px solid var(--cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
    box-shadow: 0 0 18px rgba(34,221,235,0.2);
  }

  .step-line {
    width: 2px;
    height: 32px;
    background: linear-gradient(to bottom, var(--cyan), rgba(34,221,235,0.15));
  }

  .corridor-step:last-child .step-line { display: none; }

  .step-content {
    padding-bottom: 28px;
    flex: 1;
  }

  .step-title {
    font-weight: 700;
    font-size: 17px;
    color: var(--white);
    margin-bottom: 4px;
  }
  .step-desc {
    font-size: 14px;
    color: var(--grey2);
  }

  /* ─── PARTNERSHIP ─── */
  #partners {
    background: var(--navy2);
  }

  .partner-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 40px;
  }

  .partner-card {
    background: rgba(6,22,46,0.6);
    border: 1px solid rgba(34,221,235,0.12);
    border-radius: 12px;
    padding: 28px 24px;
    transition: border-color 0.25s, transform 0.25s;
  }
  .partner-card:hover {
    border-color: rgba(34,221,235,0.4);
    transform: translateY(-4px);
  }

  .pc-icon {
    font-size: 28px;
    margin-bottom: 14px;
  }
  .pc-title {
    font-weight: 700;
    font-size: 16px;
    color: var(--cyan);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 13px;
  }
  .pc-body {
    font-size: 14px;
    color: var(--grey2);
    line-height: 1.7;
  }

  /* ─── INVESTMENT ─── */
  #investment {
    background: var(--navy);
  }

  .invest-hero-stat {
    text-align: center;
    margin: 40px 0;
    padding: 40px 24px;
    background: linear-gradient(135deg, rgba(31,163,85,0.08), rgba(0,184,200,0.08));
    border: 1px solid rgba(34,221,235,0.18);
    border-radius: 16px;
  }

  .stat-main {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(52px, 10vw, 100px);
    font-weight: 800;
    background: linear-gradient(90deg, var(--green-light), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
  }
  .stat-label {
    font-size: 16px;
    color: var(--grey2);
    margin-top: 8px;
  }
  .stat-sub {
    font-size: 14px;
    color: var(--grey2);
    opacity: 0.7;
    margin-top: 6px;
  }

  .invest-themes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
    margin-top: 32px;
  }

  .theme-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: rgba(10,36,68,0.5);
    border: 1px solid rgba(34,221,235,0.1);
    border-radius: 10px;
    padding: 20px;
    transition: border-color 0.2s;
  }
  .theme-item:hover { border-color: rgba(34,221,235,0.3); }

  .theme-num {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 36px;
    font-weight: 800;
    color: rgba(34,221,235,0.2);
    line-height: 1;
    flex-shrink: 0;
    width: 36px;
  }

  .theme-content {}
  .theme-title {
    font-weight: 700;
    font-size: 15px;
    color: var(--white);
    margin-bottom: 4px;
  }
  .theme-desc {
    font-size: 13px;
    color: var(--grey2);
    line-height: 1.6;
  }

  /* ─── WHY IT MATTERS ─── */
  #why {
    background: var(--navy2);
  }

  .matters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 40px;
  }

  .matter-card {
    background: rgba(6,22,46,0.7);
    border: 1px solid rgba(34,221,235,0.1);
    border-radius: 12px;
    padding: 28px 22px;
    border-top: 3px solid transparent;
    transition: all 0.25s;
  }
  .matter-card.green { border-top-color: var(--green); }
  .matter-card.teal  { border-top-color: var(--teal); }
  .matter-card.cyan  { border-top-color: var(--cyan); }
  .matter-card.gold  { border-top-color: var(--gold); }
  .matter-card.glight{ border-top-color: var(--green-light); }
  .matter-card:hover { transform: translateY(-4px); }

  .mc-icon { font-size: 28px; margin-bottom: 14px; }
  .mc-title {
    font-weight: 700;
    font-size: 15px;
    color: var(--white);
    margin-bottom: 8px;
  }
  .mc-body {
    font-size: 14px;
    color: var(--grey2);
    line-height: 1.65;
  }

  /* ─── CTA PATHWAYS ─── */
  #cta-pathways {
    background: var(--navy);
    text-align: center;
  }

  .pathway-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .pathway-card {
    background: linear-gradient(135deg, rgba(10,36,68,0.8), rgba(6,22,46,0.8));
    border: 1px solid rgba(34,221,235,0.18);
    border-radius: 14px;
    padding: 32px 22px;
    text-align: center;
    transition: all 0.25s;
    cursor: pointer;
  }
  .pathway-card:hover {
    border-color: var(--cyan);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(34,221,235,0.12);
  }

  .pc-big-icon { font-size: 36px; margin-bottom: 16px; }
  .pc-big-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
  }
  .pc-big-desc {
    font-size: 13px;
    color: var(--grey2);
    line-height: 1.6;
    margin-bottom: 20px;
  }

  .btn-card {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 5px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    background: rgba(34,221,235,0.12);
    border: 1px solid rgba(34,221,235,0.35);
    color: var(--cyan);
    transition: all 0.2s;
    cursor: pointer;
  }
  .btn-card:hover {
    background: rgba(34,221,235,0.22);
  }

  /* ─── LEAD CAPTURE ─── */
  #contact {
    background: var(--navy2);
  }

  .contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
    margin-top: 40px;
  }
  @media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
  }

  .form-group {
    margin-bottom: 18px;
  }

  .form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--grey2);
    margin-bottom: 6px;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    width: 100%;
    background: rgba(6,22,46,0.8);
    border: 1px solid rgba(34,221,235,0.2);
    border-radius: 6px;
    padding: 12px 16px;
    color: var(--white);
    font-family: 'Barlow', sans-serif;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s;
    -webkit-appearance: none;
  }
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus {
    border-color: var(--cyan);
  }
  .form-group select option {
    background: var(--navy2);
  }
  .form-group textarea { resize: vertical; min-height: 100px; }
  .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  @media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }

  .contact-info {}
  .ci-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(34,221,235,0.1);
  }
  .ci-item:last-child { border-bottom: none; }
  .ci-icon {
    font-size: 22px;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: rgba(34,221,235,0.08);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .ci-title { font-weight: 700; font-size: 15px; color: var(--white); margin-bottom: 4px; }
  .ci-desc { font-size: 14px; color: var(--grey2); line-height: 1.6; }

  /* ─── DOWNLOADS ─── */
  #downloads {
    background: var(--navy);
    text-align: center;
  }

  .download-list {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
    margin-top: 36px;
  }

  .dl-item {
    background: rgba(10,36,68,0.7);
    border: 1px solid rgba(34,221,235,0.18);
    border-radius: 10px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--grey);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
  }
  .dl-item:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    transform: translateY(-2px);
  }
  .dl-icon { font-size: 18px; }

  /* ─── FOOTER ─── */
  footer {
    background: #040f1e;
    border-top: 1px solid rgba(34,221,235,0.1);
    padding: 48px 24px 32px;
  }

  .footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
    align-items: flex-start;
  }

  .footer-brand {}
  .footer-brand img { height: 40px; margin-bottom: 14px; }
  .footer-brand p { font-size: 13px; color: var(--grey2); max-width: 280px; line-height: 1.65; }

  .footer-links {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
  }
  .footer-col h4 {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--grey2);
    margin-bottom: 14px;
  }
  .footer-col ul { list-style: none; }
  .footer-col ul li { margin-bottom: 8px; }
  .footer-col ul li a {
    color: var(--grey2);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
  }
  .footer-col ul li a:hover { color: var(--cyan); }

  .footer-bottom {
    max-width: 1100px;
    margin: 32px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(34,221,235,0.08);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
  }
  .footer-bottom p { font-size: 12px; color: rgba(138,175,200,0.5); }

  /* ─── SCROLL ANIMATIONS ─── */
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* sticky book button */
  .sticky-book {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    background: linear-gradient(135deg, var(--green), var(--teal));
    color: #fff;
    padding: 14px 22px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-decoration: none;
    box-shadow: 0 6px 28px rgba(0,184,200,0.4);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
  }
  .sticky-book:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 36px rgba(0,184,200,0.55);
  }

  /* number badge */
  .num-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(34,221,235,0.15);
    border: 1px solid rgba(34,221,235,0.3);
    font-size: 13px;
    font-weight: 700;
    color: var(--cyan);
    flex-shrink: 0;
  }