/* ─── SHARED / GLOBAL ──────────────────────────────────────── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      /* ── 60% NEUTRAL ── */
      --bg:         #F8FAFC;
      --white:      #FFFFFF;
      --ink:        #0F172A;
      --sub:        #64748B;
      --hint:       #94A3B8;
      --border:     #E4ECFC;
      --border-glass: rgba(255,255,255,0.18);

      /* ── 30% BRAND — soft pearl sky blue (identity colour) ── */
      --brand:        #5AB8D8;
      --brand-deep:   #2B7EA4;
      --brand-light:  #E0F6FC;
      --brand-mid:    #80CCDF;
      --brand-glow:   rgba(90,184,216,0.12);

      /* ── 10% ACCENT — blue for CTAs only ── */
      --blue:       #2563EB;
      --blue-light: #EFF6FF;
      --blue-mid:   #3B82F6;

      /* ── Role colours (card-specific only) ── */
      --green:      #059669;
      --green-light:#ECFDF5;
      --amber:      #D97706;
      --amber-light:#FFFBEB;

      --radius-sm:  10px;
      --radius-md:  18px;
      --radius-lg:  28px;
      --radius-xl:  40px;
      --shadow-sm:  0 2px 12px rgba(90,184,216,0.06);
      --shadow-md:  0 8px 40px rgba(90,184,216,0.10);
      --shadow-lg:  0 24px 80px rgba(90,184,216,0.13);
      --shadow-glass: 0 8px 32px rgba(0,0,0,0.10);
    }

    html { scroll-behavior: smooth; }
    body {
      font-family: 'Quicksand', 'Inter', sans-serif;
      background: var(--bg);
      color: var(--ink);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    /* ── ANIMATED MESH BACKGROUND ── */
    body::before {
      content: '';
      position: fixed; inset: 0; z-index: -1;
      background:
        radial-gradient(ellipse 80% 50% at 20% 0%,  rgba(37,99,235,0.05)  0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(5,150,105,0.04)  0%, transparent 60%),
        radial-gradient(ellipse 55% 45% at 65% 30%,  rgba(90,184,216,0.08) 0%, transparent 55%),
        radial-gradient(ellipse 40% 35% at 15% 70%,  rgba(128,204,223,0.05) 0%, transparent 50%),
        #F8FAFC;
      pointer-events: none;
    }

    /* ── NAVBAR ── */
    nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 200;
      display: flex; align-items: center; justify-content: space-between;
      padding: 0 5%; height: 68px;
      /* NO backdrop-filter on purpose: animating the SIZE of a blurred bar
         forces the browser to recompute the blur every frame, which judders
         the contract even on fast hardware. A clean near-solid background
         keeps the look tidy and lets the contract animate buttery-smooth. */
      background: rgba(249,250,252,0.92);
      border-bottom: 1px solid rgba(228,236,252,0.6);
      transition: background 0.3s;
    }
    nav.scrolled {
      background: rgba(249,250,252,0.97);
      box-shadow: 0 4px 24px rgba(37,99,235,0.08);
    }

    /* ── Contract-on-scroll: SCOPED to the site header (#nav) only, so it
       never leaks into other <nav> elements (e.g. the book's .pm-book__chapters
       rail). Centered at all times (left:50% + translateX) so it shrinks
       symmetrically; borderless at top, thin border + shadow fade in on float. */
    #nav {
      left: 50%; right: auto; transform: translateX(-50%);
      width: 100%; max-width: 100%;
      border: 1px solid transparent;
      transition: max-width .34s cubic-bezier(.4,0,.2,1), top .34s cubic-bezier(.4,0,.2,1), height .34s ease, padding .34s ease, border-radius .34s ease, border-color .34s ease, box-shadow .34s ease, background .3s ease;
    }
    #nav.scrolled {
      background: rgba(249,250,252,0.97);
      box-shadow: 0 4px 24px rgba(37,99,235,0.08);
    }
    @media (min-width: 761px){
      #nav.scrolled {
        max-width: 1120px; top: 12px; height: 60px; padding: 0 22px;
        border-radius: 16px; border-color: rgba(228,236,252,0.95);
        box-shadow: 0 10px 28px rgba(16,24,40,0.11);
      }
    }
    .nav-logo { display: flex; align-items: center; text-decoration: none; }
    .nav-logo img { height: 48px; width: auto; }
    .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
    .nav-links a { font-size: 14px; font-weight: 600; color: var(--sub); text-decoration: none; transition: color .2s; }
    .nav-links a:hover { color: var(--ink); }
    .nav-cta {
      background: var(--blue) !important; color: #fff !important;
      padding: 9px 20px; border-radius: 980px;
      font-size: 14px !important; font-weight: 700 !important;
      box-shadow: 0 4px 14px rgba(37,99,235,0.3);
      transition: filter .2s, transform .15s, box-shadow .2s !important;
    }
    .nav-cta:hover { filter: brightness(1.1); transform: scale(1.04); box-shadow: 0 6px 20px rgba(37,99,235,0.4); }

    /* Secondary CTA — refined blue OUTLINE (e.g. Hiring Now). Uses an inset
       box-shadow as the border so it doesn't shift size vs the solid button. */
    .nav-cta--outline {
      background: transparent !important; color: var(--blue) !important;
      box-shadow: inset 0 0 0 1.5px rgba(37,99,235,0.45) !important;
    }
    .nav-cta--outline:hover {
      background: rgba(37,99,235,0.06) !important; filter: none;
      box-shadow: inset 0 0 0 1.5px rgba(37,99,235,0.75) !important;
    }

    /* GOLD nav CTA — static rich gold, white text, no shine sweep */
    .nav-cta--gold {
      background: linear-gradient(110deg,
        #C99A3A 0%,
        #D9AE48 30%,
        #E8C068 50%,
        #D9AE48 70%,
        #C99A3A 100%
      ) !important;
      color: #ffffff !important;
      padding: 9px 20px !important;
      border-radius: 980px !important;
      font-size: 14px !important;
      font-weight: 700 !important;
      text-shadow: 0 1px 2px rgba(102,72,20,0.45);
      box-shadow:
        0 1px 0 rgba(255,255,255,0.45) inset,
        0 0 0 1px rgba(184,138,54,0.45),
        0 2px 6px rgba(102,72,20,0.18) !important;
      transition: filter .2s, transform .15s, box-shadow .25s !important;
    }
    .nav-cta--gold:hover {
      filter: brightness(1.05);
      transform: scale(1.04);
      box-shadow:
        0 1px 0 rgba(255,255,255,0.55) inset,
        0 0 0 1px rgba(184,138,54,0.55),
        0 4px 10px rgba(102,72,20,0.22) !important;
    }
    @keyframes navCtaGoldShimmer {
      0%, 100% { background-position: 0% 50%; }
      50%      { background-position: 100% 50%; }
    }
    @media (prefers-reduced-motion: reduce) {
      .nav-cta--gold { animation: none !important; }
    }

    /* ── COMET BUTTON ── */
    @property --angle { syntax: '<angle>'; initial-value: 0deg; inherits: false; }
    @keyframes orbit { to { --angle: 360deg; } }

    .comet-wrap {
      position: relative; display: inline-block;
      border-radius: 980px; padding: 2px;
      background: conic-gradient(
        from var(--angle),
        transparent 0%, transparent 58%,
        #93C5FD 70%, #ffffff 78%, #93C5FD 86%, transparent 100%
      );
      animation: orbit 2.6s linear infinite;
    }
    .comet-wrap::after {
      content: ''; position: absolute; inset: 2px;
      border-radius: 980px; background: var(--blue); z-index: 0;
    }
    .comet-btn {
      position: relative; z-index: 1;
      display: inline-flex; align-items: center; gap: 9px;
      background: var(--blue); color: #fff;
      padding: 14px 28px; border-radius: 980px;
      font-size: 15px; font-weight: 700; text-decoration: none;
      transition: transform .15s, filter .15s;
      box-shadow: 0 4px 20px rgba(37,99,235,0.35);
      white-space: nowrap;
    }
    .comet-btn:hover { transform: scale(1.04); filter: brightness(1.08); }

    .btn-ghost {
      display: inline-flex; align-items: center; gap: 8px;
      background: rgba(255,255,255,0.1); color: #fff;
      padding: 14px 28px; border-radius: 980px;
      font-size: 15px; font-weight: 600; text-decoration: none;
      border: 1px solid rgba(255,255,255,0.24);
      backdrop-filter: blur(10px);
      transition: background .2s, transform .15s;
    }
    .btn-ghost:hover { background: rgba(255,255,255,0.2); transform: scale(1.03); }

    /* ── GLASS CARD ── */
    .glass {
      background: rgba(255,255,255,0.65);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border: 1px solid rgba(255,255,255,0.7);
      box-shadow: var(--shadow-glass);
    }


/* ─── SHIMMER + SECTION HEADERS + ACCENTS ─────────────────── */
    /* ── WATER SHIMMER — light glinting on ocean surface ── */
    @keyframes waterShimmer {
      0%   { background-position: 200% center; }
      100% { background-position: -200% center; }
    }
    @keyframes glowWave {
      0%, 100% { filter: drop-shadow(0 0 2px rgba(90,184,216,0.10)); }
      50%       { filter: drop-shadow(0 0 6px rgba(186,232,245,0.30))
                          drop-shadow(0 0 12px rgba(90,184,216,0.10)); }
    }

    /* Shared shimmer mixin — reused on labels, stats, headline accents */
    .shimmer-text {
      background: linear-gradient(90deg,
        #2B7EA4 0%,
        #5AB8D8 28%,
        #C8EEFA 44%,
        #EEF9FF 50%,   /* sun-on-water peak */
        #C8EEFA 56%,
        #5AB8D8 72%,
        #2B7EA4 100%
      );
      background-size: 300% 100%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      animation: waterShimmer 5s linear infinite, glowWave 4s ease-in-out infinite;
    }

    /* ── SHARED ── */
    section { padding: 100px 5%; }
    .section-label {
      display: inline-block; font-size: 11px; font-weight: 700;
      text-transform: uppercase; letter-spacing: 1.5px;
      color: var(--brand); margin-bottom: 16px;
    }
    .section-title {
      font-family: 'Inter', sans-serif;
font-size: clamp(36px,5vw,64px);
      font-weight: 700;
      letter-spacing: -0.03em;
      color: var(--ink);
line-height: 1.2;
margin-bottom: 24px;
    }
        .section-sub {
      font-size: 17px; color: var(--sub); margin-top: 18px;
      line-height: 1.78; font-weight: 500; max-width: 560px;
    }

    /* ── INLINE HEADLINE ACCENT — gentle ocean shimmer ── */
    .hl-word {
      font-style: italic;
      font-weight: 700;
      /* Fallback solid color so the word stays readable even if the
         compositor drops the gradient (heavy marquee pages occasionally
         lose -webkit-text-fill-color: transparent under paint pressure). */
      color: #67C3E5;
      background: linear-gradient(90deg,
        #4B9FC8 0%,
        #67C3E5 30%,
        #A9E2F5 46%,
        #C5F0FC 50%,
        #A9E2F5 54%,
        #67C3E5 70%,
        #4B9FC8 100%
      );
      background-size: 300% 100%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      animation: waterShimmer 20s linear infinite, glowWave 16s ease-in-out infinite;
      animation-play-state: running;
      /* GPU-promote so this animation runs on its own layer instead of
         repainting the entire headline every frame. */
      will-change: background-position, filter;
    }
    /* Pause the shimmer when user prefers reduced motion or when the
       headline isn't on screen — handled via JS below for off-screen. */
    @media (prefers-reduced-motion: reduce) {
      .hl-word { animation: none; }
    }

.hl-script {
  font-family: 'Jura', sans-serif;
  font-style: normal;
  font-weight: 500;
  font-size: 1.1em;
  letter-spacing: 0.04em;
  opacity: 0.9;
}
    /* ── LAVA / DRAGON FIRE — scorched earth, glowing ember ── */
    @keyframes lavaShimmer {
      0%   { background-position: 200% center; }
      100% { background-position: -200% center; }
    }
    @keyframes lavaGlow {
      0%, 100% {
        filter: drop-shadow(0 0 4px rgba(180,190,200,0.30))
                drop-shadow(0 0 10px rgba(255,255,255,0.12));
      }
      50% {
        filter: drop-shadow(0 0 10px rgba(210,220,230,0.65))
                drop-shadow(0 0 22px rgba(255,255,255,0.35))
                drop-shadow(0 0 38px rgba(180,195,210,0.18));
      }
    }
    .hl-lava {
      font-style: italic;
      /* Same clipped-glyph problem as the chapter numerals: the colour comes from
         background-clip:text, so the letters only show where the background box
         reaches, and the italic "f" leans past it. Measured live: 3.6px of ink
         outside the box at 52px, which sliced the tail off the word. Padding
         widens the paint box, the negative margin keeps the layout unchanged. */
      padding-right: 0.10em;
      margin-right: -0.10em;
      background: linear-gradient(90deg,
        #707880 0%,
        #A0ACB8 18%,
        #C8D4DC 34%,
        #E8EFF4 44%,
        #FFFFFF 50%,   /* polished silver peak */
        #E8EFF4 56%,
        #C8D4DC 66%,
        #A0ACB8 82%,
        #707880 100%
      );
      background-size: 300% 100%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      animation: lavaShimmer 18s linear infinite, lavaGlow 7s ease-in-out infinite;
    }

/* ─── REVEAL + RESPONSIVE ─────────────────────────────────── */
    /* ── REVEAL ANIMATIONS ── */
    .reveal { opacity: 0; transform: translateY(32px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.from-left { transform: translateX(-32px); }
    .reveal.from-right { transform: translateX(32px); }
    .reveal.visible { opacity: 1; transform: none; }

    /* ── RESPONSIVE ── */
    @media (max-width: 1024px) {
      .plans-grid { grid-template-columns: repeat(2, 1fr); }
      .steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
      .steps::before { display: none; }
    }
    @media (max-width: 900px) {
      .roles-strip { grid-template-columns: 1fr; }
      .stats-bar { grid-template-columns: repeat(2,1fr); }
      .testimonials-grid { grid-template-columns: 1fr; }
      .stories { grid-template-columns: 1fr 1fr; }
      .serve-grid { grid-template-columns: repeat(2,1fr); }
      .footer-top { grid-template-columns: 1fr 1fr; }
      .how-inner { padding: 60px 32px; }
      .features-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 600px) {
      .nav-links { display: none; }
      .photo-layout { display: flex; flex-direction: column; height: auto; }
      .photo-main img, .photo-sm img { height: 260px; }
      .steps { grid-template-columns: 1fr; }
      .stories { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .how-outer { padding: 0 0 80px; }
      .how-inner { border-radius: 0; padding: 60px 24px; }
      .cta-inner { padding: 60px 24px; border-radius: var(--radius-lg); }
      .features-grid { grid-template-columns: 1fr; }
      .plans-grid { grid-template-columns: 1fr; }
      .serve-grid { grid-template-columns: 1fr 1fr; }
      .stats-bar { grid-template-columns: 1fr 1fr; }
      /* age group responsive handled in .agi-card */
    }

    /* ════════════════════════════════════════════════════════════
       MOBILE NAV — hamburger button + slide-in drawer

       Desktop nav-links are hidden ≤600px. The hamburger appears,
       toggles a right-side drawer that mirrors every nav link plus
       Sign In, Apply Now, and Hiring Now CTAs. Designed to feel
       premium / iOS-native, not "default Bootstrap".
       ════════════════════════════════════════════════════════════ */

    /* Hamburger button — hidden on desktop, shown on mobile. */
    .nav-hamburger {
      display: none;
      width: 40px; height: 40px;
      padding: 0; margin: 0;
      background: transparent;
      border: 1px solid rgba(15,23,42,0.12);
      border-radius: 12px;
      cursor: pointer;
      align-items: center; justify-content: center;
      flex-direction: column;
      gap: 5px;
      transition: background .2s ease, border-color .2s ease, transform .15s ease;
      -webkit-tap-highlight-color: transparent;
    }
    .nav-hamburger:active { transform: scale(0.96); }
    .nav-hamburger__bar {
      display: block;
      width: 18px; height: 1.8px;
      background: #0F172A;
      border-radius: 2px;
      transition: transform .28s cubic-bezier(.6,.05,.3,1), opacity .2s ease;
    }
    /* Animated X when open. */
    .nav-hamburger.is-active .nav-hamburger__bar:nth-child(1) {
      transform: translateY(6.8px) rotate(45deg);
    }
    .nav-hamburger.is-active .nav-hamburger__bar:nth-child(2) {
      opacity: 0;
    }
    .nav-hamburger.is-active .nav-hamburger__bar:nth-child(3) {
      transform: translateY(-6.8px) rotate(-45deg);
    }

    /* Drawer overlay — full-screen, blurred backdrop. */
    .nav-mobile {
      position: fixed; inset: 0;
      z-index: 300;
      display: none;
      pointer-events: none;
      opacity: 0;
      transition: opacity .26s ease;
    }
    .nav-mobile.is-open {
      display: block;
      pointer-events: auto;
      opacity: 1;
    }
    .nav-mobile__backdrop {
      position: absolute; inset: 0;
      background: rgba(8, 12, 24, 0.55);
      -webkit-backdrop-filter: blur(8px);
      backdrop-filter: blur(8px);
      border: 0; padding: 0;
      cursor: pointer;
    }

    /* Drawer panel — slides in from the right edge. */
    .nav-mobile__panel {
      position: absolute;
      top: 0; right: 0; bottom: 0;
      width: min(86vw, 360px);
      background: #FFFFFF;
      box-shadow: -24px 0 64px -24px rgba(8,12,24,0.35);
      transform: translateX(100%);
      transition: transform .32s cubic-bezier(.22,.9,.32,1);
      display: flex; flex-direction: column;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
      padding: 18px 20px 24px;
    }
    .nav-mobile.is-open .nav-mobile__panel {
      transform: translateX(0);
    }

    .nav-mobile__head {
      display: flex; align-items: center; justify-content: space-between;
      margin-bottom: 24px;
    }
    .nav-mobile__logo img { height: 30px; width: auto; display: block; }
    .nav-mobile__close {
      width: 36px; height: 36px;
      padding: 0;
      background: rgba(15,23,42,0.05);
      border: 1px solid rgba(15,23,42,0.10);
      border-radius: 50%;
      color: #0F172A;
      display: flex; align-items: center; justify-content: center;
      cursor: pointer;
      transition: background .18s ease, transform .15s ease;
    }
    .nav-mobile__close:hover {
      background: #0F172A; color: #fff; border-color: #0F172A;
    }
    .nav-mobile__close:active { transform: scale(0.95); }

    .nav-mobile__sr {
      position: absolute;
      width: 1px; height: 1px;
      padding: 0; margin: -1px;
      overflow: hidden;
      clip: rect(0,0,0,0);
      white-space: nowrap;
      border: 0;
    }

    .nav-mobile__group-label {
      display: block;
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: rgba(15,23,42,0.45);
      margin: 0 0 12px 4px;
    }

    /* CRITICAL: shared.css applies `nav { position:fixed; height:68px;
       backdrop-filter:blur(...); border-bottom:1px solid; }` to EVERY
       <nav> element. The drawer's inner <nav class="nav-mobile__nav">
       was inheriting that — which is why every link was being squashed
       into a 68px-tall fixed bar at the top of the panel and stacking
       on top of each other. Reset all of those properties here. */
    .nav-mobile__nav {
      position: static;
      display: flex;
      flex-direction: column;
      align-items: stretch;
      justify-content: flex-start;
      gap: 2px;
      height: auto;
      padding: 0;
      margin: 0;
      background: transparent;
      backdrop-filter: none;
      -webkit-backdrop-filter: none;
      border: 0;
      box-shadow: none;
    }
    .nav-mobile__link {
      display: flex; align-items: center; justify-content: space-between;
      padding: 14px 14px 14px 16px;
      border-radius: 12px;
      font-size: 16px;
      font-weight: 600;
      color: #0F172A;
      text-decoration: none;
      transition: background .18s ease, transform .15s ease;
    }
    .nav-mobile__link:hover {
      background: rgba(15,23,42,0.04);
    }
    .nav-mobile__link:active {
      background: rgba(15,23,42,0.07);
      transform: scale(0.992);
    }
    .nav-mobile__link-arrow {
      display: flex; align-items: center; justify-content: center;
      color: rgba(15,23,42,0.35);
      transition: transform .18s ease, color .18s ease;
    }
    .nav-mobile__link:hover .nav-mobile__link-arrow {
      transform: translateX(2px);
      color: rgba(15,23,42,0.6);
    }

    .nav-mobile__divider {
      height: 1px;
      background: rgba(15,23,42,0.08);
      margin: 18px 4px;
    }

    .nav-mobile__account { display: flex; flex-direction: column; }
    .nav-mobile__signin {
      display: flex; align-items: center; gap: 14px;
      padding: 14px 16px;
      border-radius: 14px;
      background: rgba(37,99,235,0.06);
      border: 1px solid rgba(37,99,235,0.18);
      color: #0F172A;
      text-decoration: none;
      transition: background .18s ease, border-color .18s ease, transform .15s ease;
    }
    .nav-mobile__signin:hover {
      background: rgba(37,99,235,0.10);
      border-color: rgba(37,99,235,0.28);
    }
    .nav-mobile__signin:active { transform: scale(0.992); }
    .nav-mobile__signin-icon {
      width: 36px; height: 36px;
      border-radius: 10px;
      background: #2563EB;
      color: #fff;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }
    .nav-mobile__signin-text { display: flex; flex-direction: column; gap: 2px; }
    .nav-mobile__signin-title { font-size: 15px; font-weight: 700; line-height: 1.1; }
    .nav-mobile__signin-meta { font-size: 12px; font-weight: 500; color: rgba(15,23,42,0.55); line-height: 1.2; }

    .nav-mobile__cta-stack {
      display: flex; flex-direction: column; gap: 10px;
      margin-top: 18px;
    }
    .nav-mobile__cta {
      display: flex; align-items: center; justify-content: center;
      gap: 8px;
      padding: 14px 18px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 700;
      text-decoration: none;
      transition: filter .18s ease, transform .15s ease, box-shadow .2s ease;
    }
    .nav-mobile__cta:active { transform: scale(0.98); }
    .nav-mobile__cta--gold {
      background: linear-gradient(110deg, #C99A3A 0%, #D9AE48 30%, #E8C068 50%, #D9AE48 70%, #C99A3A 100%);
      color: #fff;
      text-shadow: 0 1px 2px rgba(102,72,20,0.45);
      box-shadow: 0 1px 0 rgba(255,255,255,0.45) inset, 0 0 0 1px rgba(184,138,54,0.45), 0 6px 18px rgba(102,72,20,0.22);
    }
    .nav-mobile__cta--gold:hover { filter: brightness(1.06); }
    .nav-mobile__cta--blue {
      background: #2563EB;
      color: #fff;
      box-shadow: 0 6px 20px rgba(37,99,235,0.30);
    }
    .nav-mobile__cta--blue:hover { filter: brightness(1.08); }

    .nav-mobile__foot {
      margin-top: auto;
      padding-top: 24px;
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: rgba(15,23,42,0.35);
      text-align: center;
    }

    /* Body scroll lock when drawer is open. */
    body.nav-mobile-lock { overflow: hidden; }

    /* Show the hamburger ≤760px. The desktop nav-links are already
       hidden ≤600 above; we extend the same hide up to 760 so the
       hamburger fully replaces the desktop nav on every phone. */
    @media (max-width: 760px) {
      .nav-links { display: none; }
      .nav-hamburger { display: flex; }
    }