/* whatsapp-auth — page styles (extracted from inline <style>). */
  /* ── WhatsApp Auth hero — adopted from "Variation A · Silent flow".
     Built on v5 tokens. Local-only classes namespaced with `wah-`. ── */
  .wah-hero {
    padding: clamp(72px, 10vh, 112px) 0 clamp(48px, 8vh, 80px);
    background: var(--bg);
    border-bottom: 1px solid var(--hairline);
    position: relative;
    overflow: hidden;
  }
  .wah-hero::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 46% 38% at 82% 18%, rgba(79,70,229,0.05) 0%, transparent 70%);
    pointer-events: none;
  }
  .wah-hero-inner {
    position: relative; z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(48px, 5vw, 88px);
    align-items: center;
  }
  .wah-hero-left { display: flex; flex-direction: column; align-items: flex-start; }
  .wah-hero-left .eyebrow { margin-bottom: var(--sp-6); }
  .wah-h1 {
    font-family: var(--font-sans);
    font-size: clamp(40px, 5.4vw, 64px);
    font-weight: var(--weight-semibold);
    line-height: 1.02;
    letter-spacing: -0.034em;
    color: var(--text-strong);
    margin-bottom: var(--sp-5);
  }
  .wah-h1 .mute { color: var(--g8); display: block; }
  .wah-lead {
    font-size: var(--text-md);
    line-height: 1.65;
    color: var(--g9);
    max-width: 48ch;
    margin-bottom: var(--sp-8);
  }
  .wah-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
  .wah-hero-right { display: flex; justify-content: center; }

  @keyframes wah-pulse { 0%,100% { opacity:1; } 50% { opacity:0.4; } }

  /* Phone shell */
  .wah-phone-stage { display: flex; flex-direction: column; align-items: center; gap: var(--sp-4); }
  .wah-phone {
    width: 268px; height: 540px;
    background: #0C0C0C;
    border-radius: 42px;
    padding: 12px;
    box-shadow: 0 30px 80px -24px rgba(14,14,12,0.32), 0 2px 0 rgba(255,255,255,0.04) inset;
    position: relative;
  }
  .wah-phone-notch {
    position: absolute; top: 18px; left: 50%; transform: translateX(-50%);
    width: 96px; height: 26px; background: #0C0C0C; border-radius: 0 0 16px 16px; z-index: 3;
  }
  .wah-phone-screen {
    width: 100%; height: 100%;
    background: var(--bg);
    border-radius: 32px;
    overflow: hidden;
    position: relative;
    display: flex; flex-direction: column;
  }
  .wah-phone-statusbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 26px 0;
    font-family: var(--font-sans); font-size: 12px; font-weight: 600; color: var(--text-strong);
  }
  .wah-phone-statusbar .dots { letter-spacing: 2px; color: var(--g8); }
  .wah-phone-body { flex: 1; position: relative; }

  .wah-state {
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    padding: 30px 24px 24px;
    opacity: 0; transform: translateY(6px);
    transition: opacity 320ms var(--ease), transform 320ms var(--ease);
    pointer-events: none;
  }
  .wah-state.is-active { opacity: 1; transform: none; }
  .wah-state--center { align-items: center; justify-content: center; gap: var(--sp-4); text-align: center; }

  /* app brand lockup */
  .wah-brand { display: flex; align-items: center; gap: 9px; margin-bottom: 26px; }
  .wah-logo {
    width: 32px; height: 32px; border-radius: 9px;
    background: linear-gradient(150deg, #5B52F0, #4F46E5);
    display: grid; place-items: center; color: #FFF;
    font-family: var(--font-sans); font-size: 17px; font-weight: 700; letter-spacing: -0.04em;
    box-shadow: 0 4px 12px -4px rgba(79,70,229,0.5);
  }
  .wah-brand-name { font-family: var(--font-sans); font-size: 15px; font-weight: 600; color: var(--text-strong); letter-spacing: -0.01em; }
  .wah-app-title { font-family: var(--font-sans); font-size: 21px; font-weight: 600; letter-spacing: -0.02em; color: var(--text-strong); margin-bottom: 6px; }
  .wah-app-sub { font-family: var(--font-sans); font-size: 12.5px; line-height: 1.5; color: var(--g8); margin-bottom: 22px; }
  .wah-app-sub b { color: var(--text-strong); font-weight: 600; }

  /* phone-number entry */
  .wah-field-lbl { font-family: var(--font-sans); font-size: 11px; font-weight: 600; color: var(--g8); margin-bottom: 7px; display: block; }
  .wah-field {
    width: 100%; padding: 12px 13px; border: 1.5px solid var(--accent);
    border-radius: 12px; background: var(--bg); white-space: nowrap;
    font-family: var(--font-sans); font-size: 15px; font-weight: 500; color: var(--text-strong);
    display: flex; align-items: center;
    box-shadow: 0 0 0 3px var(--accent-soft);
  }
  .wah-field .flag { color: var(--text-strong); margin-right: 9px; padding-right: 9px; font-weight: 600; border-right: 1px solid var(--hairline-strong); }
  .wah-caret { width: 2px; height: 18px; background: var(--accent); margin-left: 3px; animation: wah-blink 1s steps(1) infinite; }
  @keyframes wah-blink { 50% { opacity: 0; } }
  .wah-continue {
    margin-top: 16px; width: 100%; padding: 13px; border-radius: 12px;
    background: var(--accent); color: #FFF; text-align: center;
    font-family: var(--font-sans); font-size: 14.5px; font-weight: 600; letter-spacing: -0.005em;
    transition: transform 140ms var(--ease), filter 140ms var(--ease);
  }
  .wah-continue.is-pressing { transform: scale(0.96); filter: brightness(0.88); }
  .wah-foot-note { margin-top: auto; padding-top: 18px; font-family: var(--font-sans); font-size: 10.5px; line-height: 1.5; color: var(--g7); text-align: center; }
  .wah-foot-note b { color: var(--g8); font-weight: 600; }

  /* OTP auto-fill */
  .wah-otp { display: flex; justify-content: space-between; gap: 6px; }
  .wah-otp-cell {
    width: 30px; height: 42px; border: 1.5px solid var(--hairline-strong); border-radius: 10px;
    display: grid; place-items: center; background: var(--bg);
    font-family: var(--font-sans); font-size: 19px; font-weight: 600; color: var(--text-strong);
    transition: border-color 180ms var(--ease), background 180ms var(--ease), box-shadow 180ms var(--ease);
  }
  .wah-otp-cell.filled { border-color: var(--accent); background: var(--accent-soft); }
  .wah-otp-cell .d { display: inline-block; animation: wah-pop 220ms var(--ease-spring); }
  @keyframes wah-pop { from { transform: scale(0.4); opacity: 0; } to { transform: scale(1); opacity: 1; } }
  .wah-otp.is-submitting .wah-otp-cell { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
  .wah-otp-status { margin-top: 18px; font-family: var(--font-sans); font-size: 12px; color: var(--g8); display: inline-flex; align-items: center; gap: 7px; align-self: center; }
  .wah-otp-status.ok { color: #16A34A; font-weight: 600; }
  .wah-otp-status .ping { width: 7px; height: 7px; border-radius: 50%; background: #25D366; animation: wah-pulse 1.4s infinite; }
  .wah-resend { margin-top: auto; padding-top: 18px; font-family: var(--font-sans); font-size: 12px; color: var(--g7); text-align: center; }
  .wah-resend b { color: var(--g8); font-weight: 600; }

  /* success */
  .wah-check { width: 56px; height: 56px; border-radius: 50%; background: #16A34A; color: #FFF; display: grid; place-items: center; box-shadow: 0 8px 28px -8px rgba(22,163,74,0.5); }
  .wah-welcome { font-family: var(--font-sans); font-size: 22px; font-weight: 600; letter-spacing: -0.02em; color: var(--text-strong); }
  .wah-sub { font-family: var(--font-mono); font-size: 11px; color: var(--accent); letter-spacing: 0.04em; }

  .wah-caption { font-family: var(--font-mono); font-size: 11px; color: var(--g7); letter-spacing: 0.04em; }
  .wah-caption strong { color: var(--accent); font-weight: 600; }

  @media (max-width: 960px) {
    .wah-hero-inner { grid-template-columns: 1fr; }
  }

  /* ── Why WhatsApp Auth · Versus SMS (head-to-head) ────────
     Adopted from "Why WhatsApp Auth · Variation A". `vs-` namespaced. */
  .why-vs-sec { padding: clamp(64px, 9vh, 96px) 0; background: var(--bg); border-bottom: 1px solid var(--hairline); }
  .why-vs-head { max-width: 760px; margin-bottom: var(--sp-12); }
  .why-vs-head .eyebrow { margin-bottom: var(--sp-5); }
  .why-vs-h2 {
    font-family: var(--font-sans); font-size: clamp(32px, 4vw, 48px);
    font-weight: var(--weight-semibold); line-height: 1.05; letter-spacing: -0.030em;
    color: var(--text-strong); margin-bottom: var(--sp-4);
  }
  .why-vs-h2 .mute { color: var(--g8); }
  .why-vs-lead { font-size: var(--text-md); line-height: 1.65; color: var(--g9); max-width: 58ch; }

  .vs { border: 1px solid var(--hairline-strong); border-radius: var(--r-md); overflow: hidden; background: var(--bg); }
  .vs-scroll { overflow-x: auto; }
  .vs-grid { display: grid; grid-template-columns: 1fr 1.05fr 1.05fr; min-width: 660px; }
  .vs-cell { padding: var(--sp-4) var(--sp-6); min-height: 64px; border-bottom: 1px solid var(--hairline); display: flex; align-items: center; }
  .vs-grid > .vs-cell:nth-last-child(-n+3) { border-bottom: none; }
  .vs-c-wa { background: var(--accent-soft); }
  .vs-head { min-height: 96px; border-bottom: 1px solid var(--hairline-strong); flex-direction: column; justify-content: center; align-items: flex-start; }
  .vs-head.vs-c-wa { box-shadow: inset 0 3px 0 var(--accent); }
  .vs-head-dim { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--g7); font-weight: 600; }
  .vs-head-name { display: flex; align-items: center; gap: 9px; font-family: var(--font-sans); font-size: 18px; font-weight: 600; letter-spacing: -0.015em; color: var(--text-strong); }
  .vs-c-wa .vs-head-name { color: var(--accent); }
  .vs-head-name .tick { width: 18px; height: 18px; border-radius: 50%; background: #16A34A; color: #fff; display: grid; place-items: center; }
  .vs-head-sub { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; color: var(--g7); margin-top: 5px; }
  .vs-dim { font-family: var(--font-sans); font-size: 13px; font-weight: 600; color: var(--g8); letter-spacing: -0.005em; }
  .vs-val { font-family: var(--font-sans); font-size: 14px; line-height: 1.45; color: var(--text-strong); display: flex; gap: 10px; align-items: flex-start; }
  .vs-val .ic { flex-shrink: 0; margin-top: 1px; display: inline-flex; }
  .vs-val .ic > i[data-lucide], .vs-val .ic > svg.lucide { width: 16px; height: 16px; stroke-width: 2; }
  .vs-val .ic-yes { color: #16A34A; }
  .vs-val .ic-no { color: var(--g6); }
  .vs-c-sms .vs-val { color: var(--g8); }
  .vs-val b { font-weight: 600; }
  .vs-c-wa .vs-val b { color: var(--accent); }

  /* ── On your brand · verified message vs shortcode ─────── */
  .wab-sec { padding: clamp(64px, 9vh, 96px) 0; background: var(--bg-subtle); border-bottom: 1px solid var(--hairline); }
  .wab-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(40px, 5vw, 80px); align-items: center; }
  .wab-grid .eyebrow { margin-bottom: var(--sp-5); }
  .wab-stat-row { display: flex; gap: var(--sp-10); margin-top: var(--sp-8); padding-top: var(--sp-6); border-top: 1px solid var(--hairline); }
  .wab-stat .n { font-family: var(--font-sans); font-size: 34px; font-weight: 700; letter-spacing: -0.03em; color: var(--accent); line-height: 1; }
  .wab-stat .l { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--g7); margin-top: 8px; }
  @media (max-width: 600px) {
    .wab-stat-row { gap: var(--sp-6); }
    .wab-stat .n { font-size: 26px; }
    .wab-stat .l { font-size: 9.5px; letter-spacing: 0.04em; }
  }
  .wab-stack { display: flex; flex-direction: column; gap: var(--sp-5); }
  .wab-chat { border: 1px solid var(--hairline-strong); border-radius: var(--r-md); overflow: hidden; background: var(--bg); box-shadow: 0 12px 36px -16px rgba(14,14,12,0.12); }
  .wab-chat-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; padding: 9px 14px; font-weight: 600; }
  .wab-chat--wa .wab-chat-label { background: var(--accent-soft); color: var(--accent); }
  .wab-chat--sms .wab-chat-label { background: var(--s2); color: var(--g7); }
  .wab-chat-head { display: flex; align-items: center; gap: 11px; padding: 11px 14px; border-bottom: 1px solid var(--hairline); }
  .wab-chat-avatar { width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(150deg,#5B52F0,#4F46E5); color: #fff; display: grid; place-items: center; font-family: var(--font-sans); font-size: 16px; font-weight: 700; letter-spacing: -0.03em; }
  .wab-chat-avatar.sms { background: var(--g6); border-radius: 9px; font-size: 13px; }
  .wab-chat-id { display: flex; align-items: center; gap: 6px; font-family: var(--font-sans); font-size: 14px; font-weight: 600; color: var(--text-strong); }
  .wab-chat-id .tick { width: 15px; height: 15px; border-radius: 50%; background: #16A34A; color: #fff; display: grid; place-items: center; }
  .wab-chat-sub { font-family: var(--font-mono); font-size: 10px; color: var(--g7); letter-spacing: 0.04em; margin-top: 2px; }
  .wab-chat-body { padding: 16px 14px 18px; background: var(--bg-subtle); }
  .wab-bubble { max-width: 86%; padding: 11px 13px; font-family: var(--font-sans); font-size: 13.5px; line-height: 1.5; color: var(--text-strong); position: relative; }
  .wab-bubble--wa { background: var(--bg); border: 1px solid var(--hairline); border-radius: 3px 14px 14px 14px; box-shadow: 0 1px 2px rgba(0,0,0,0.04); }
  .wab-bubble--sms { background: var(--s2); border-radius: 14px 14px 14px 3px; color: var(--g9); }
  .wab-bubble .code { font-family: var(--font-mono); font-weight: 600; color: var(--accent); letter-spacing: 0.04em; }
  .wab-bubble-meta { display: flex; align-items: center; justify-content: flex-end; gap: 5px; margin-top: 7px; font-family: var(--font-mono); font-size: 9.5px; color: var(--g6); }
  .wab-bubble-meta .dt { color: #16A34A; }
  .wab-bubble-cta { margin-top: 10px; padding: 9px; border-radius: 8px; background: var(--accent-soft); border: 1px solid var(--accent-mid); text-align: center; font-family: var(--font-sans); font-size: 12.5px; font-weight: 600; color: var(--accent); }
  @media (max-width: 960px) { .wab-grid { grid-template-columns: 1fr; } }

  /* ── How it works · dual-track timeline ────────────────── */
  .hiw-sec { padding: clamp(64px, 9vh, 96px) 0; background: var(--bg); border-bottom: 1px solid var(--hairline); }
  @keyframes hiw-spin { to { transform: rotate(360deg); } }
  .waw-dual { border: 1px solid var(--hairline-strong); border-radius: var(--r-md); overflow: hidden; background: var(--bg); }
  .waw-dual-head, .waw-dual-row { display: grid; grid-template-columns: 96px 1.4fr 1fr; gap: var(--sp-6); align-items: center; padding: var(--sp-4) var(--sp-8); }
  .waw-dual-head { background: var(--bg-subtle); border-bottom: 1px solid var(--hairline); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.09em; text-transform: uppercase; color: var(--g7); font-weight: 600; }
  .waw-dual-row { border-bottom: 1px solid var(--hairline); }
  .waw-dual-row.win { background: var(--accent-soft); }
  .waw-dual-t { font-family: var(--font-mono); font-size: 12px; color: var(--accent); font-weight: 600; font-variant-numeric: tabular-nums; }
  .waw-dual-bts { font-family: var(--font-sans); font-size: 14px; color: var(--text-strong); font-weight: 500; }
  .waw-dual-bts .sub { display: block; font-family: var(--font-mono); font-size: 11px; color: var(--g7); font-weight: 400; margin-top: 3px; }
  .waw-dual-user { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-sans); font-size: 13.5px; color: var(--g8); }
  .waw-dual-user .sp { width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--accent-mid); border-top-color: var(--accent); animation: hiw-spin 0.9s linear infinite; flex-shrink: 0; }
  .waw-dual-row.win .waw-dual-user { color: #16A34A; font-weight: 600; }
  .waw-dual-user .chk { width: 16px; height: 16px; border-radius: 50%; background: #16A34A; color: #fff; display: grid; place-items: center; flex-shrink: 0; }
  .waw-dual-otp { display: inline-flex; gap: 3px; flex-shrink: 0; }
  .waw-dual-otp i { width: 13px; height: 17px; border: 1px solid var(--hairline-strong); border-radius: 3px; font-style: normal; font-family: var(--font-mono); font-size: 10px; line-height: 15px; text-align: center; color: var(--text-strong); }
  .waw-dual-otp i.f { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
  .waw-dual-foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--sp-3); padding: var(--sp-4) var(--sp-8); background: #0F0F0F; font-family: var(--font-mono); font-size: 11px; color: rgba(255,255,255,0.55); letter-spacing: 0.04em; }
  .waw-dual-foot b { color: #86EFAC; font-weight: 600; }
  @media (max-width: 720px) {
    .waw-dual-head, .waw-dual-row { grid-template-columns: 72px 1fr; }
    .waw-dual-head span:last-child, .waw-dual-user { display: none; }
  }