/* ============================================================
   Celerius landing page — light, minimalist.

   Rules of the system:
     - one background (white), one subtle band (--surface) for rhythm
     - hairline borders instead of cards-with-shadows
     - near-black type, a single blue accent used sparingly
     - no gradients, no glows, no drop shadows
   Mobile-first; no external assets.
   ============================================================ */

:root {
  --bg:        #ffffff;
  --surface:   #fafafa;
  --surface-2: #f4f4f5;
  --line:      #e4e4e7;
  --line-strong: #d4d4d8;

  --text:  #18181b;
  --muted: #52525b;
  /* Darkened from #71717a: the hero's tinted wash ate the old value's margin
     and pushed it to 4.27:1. This holds ≥4.5 on white AND over the tint. */
  --dim:   #6b6b73;

  --accent:       #2563eb;   /* fills + large text on white */
  --accent-hover: #1d4ed8;   /* button hover */
  --accent-ink:   #1d4ed8;   /* small text on white — guarantees AA */
  --accent-wash:  #eff4ff;   /* pale blue surface tint */
  --ok:     #16a34a;
  --danger: #dc2626;

  /* Filled controls are near-black: maximum contrast, no colour needed. */
  --fill:    #18181b;
  --on-fill: #ffffff;

  --r-sm: 6px;
  --r:    8px;
  --r-lg: 12px;

  --pad: 20px;

  color-scheme: light;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -.02em; font-weight: 650; }
h1 { font-size: clamp(2rem, 6.4vw, 3.4rem); letter-spacing: -.035em; }
h2 { font-size: clamp(1.5rem, 4vw, 2.15rem); letter-spacing: -.028em; }
h3 { font-size: 1.02rem; font-weight: 600; }
p  { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { max-width: 100%; }
a { color: var(--accent); }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 var(--pad); }
.wrap-narrow { max-width: 720px; }

.skip-link {
  position: absolute; left: -9999px; top: 8px; z-index: 100;
  background: var(--fill); color: var(--on-fill); padding: 10px 16px; border-radius: var(--r-sm);
}
.skip-link:focus { left: 16px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

/* Second headline line — a smaller, lighter blue subhead under the main line. */
.grad {
  display: block;
  margin-top: 4px;
  color: var(--accent);
  font-size: clamp(1.2rem, 3.2vw, 1.85rem);
  font-weight: 400;
  letter-spacing: -.01em;
}

.kicker {
  text-transform: uppercase; letter-spacing: .13em; font-size: .7rem;
  font-weight: 600; color: var(--accent-ink); margin-bottom: 12px;
}

/* ── buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 11px 20px; border-radius: var(--r-sm);
  border: 1px solid transparent;
  font-size: .94rem; font-weight: 550; text-decoration: none; cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--on-fill); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--text); }
.btn-sm  { padding: 8px 15px; font-size: .87rem; }
.btn-lg  { padding: 13px 26px; font-size: .98rem; }
.btn-block { display: flex; width: 100%; }

/* ── header ────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 16px; height: 62px; }

.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 650; font-size: 1.06rem; color: var(--text);
  text-decoration: none; letter-spacing: -.02em;
}
.brand-mark { width: 19px; height: 19px; flex: none; }
/* Override the inline gradient fill baked into the SVG markup. */
.brand-mark path { fill: var(--text); }

.nav-toggle {
  margin-left: auto; width: 38px; height: 38px; display: grid; place-content: center; gap: 5px;
  background: transparent; border: 1px solid var(--line-strong); border-radius: var(--r-sm); cursor: pointer;
}
.nav-toggle span { display: block; width: 17px; height: 1.5px; background: var(--text); transition: .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-menu {
  display: none; position: absolute; top: 62px; left: 0; right: 0;
  flex-direction: column; gap: 2px; padding: 10px var(--pad) 16px;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.nav-menu.open { display: flex; }
.nav-menu a {
  color: var(--muted); text-decoration: none; font-weight: 500; font-size: .96rem;
  padding: 10px 2px;
}
.nav-menu a:hover { color: var(--text); }
.nav-menu .btn { margin-top: 10px; color: var(--on-fill); }

@media (min-width: 860px) {
  .nav-toggle { display: none; }
  .nav-menu {
    display: flex; position: static; flex-direction: row; align-items: center;
    gap: 28px; margin-left: auto; padding: 0; background: none; border: 0;
  }
  .nav-menu .btn { margin-top: 0; }
}

/* ── hero ──────────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; padding: 60px 0 52px; }
.hero-inner { position: relative; z-index: 1; }

/* Background wash: two very pale tints drifting slowly behind the headline.
   Built from radial-gradients with a transparent falloff rather than a blurred
   shape — no `filter`, so the browser only composites a transform.
   Peak alpha is .08. Raising it further starts pushing `--dim` text under the
   4.5:1 line — it was already the tightest colour in the palette. */
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hb { position: absolute; display: block; border-radius: 50%; will-change: transform; }
.hb-1 {
  width: 620px; height: 620px; top: -240px; left: -140px;
  background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, .08), rgba(37, 99, 235, 0) 70%);
  animation: drift-a 26s ease-in-out infinite alternate;
}
.hb-2 {
  width: 540px; height: 540px; top: -120px; right: -120px;
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, .07), rgba(99, 102, 241, 0) 70%);
  animation: drift-b 34s ease-in-out infinite alternate;
}

@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(70px, 46px, 0) scale(1.14); }
}
@keyframes drift-b {
  from { transform: translate3d(0, 0, 0) scale(1.06); }
  to   { transform: translate3d(-56px, 34px, 0) scale(.94); }
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--dim); font-size: .82rem; font-weight: 500;
  margin-bottom: 20px;
}
.pulse { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); flex: none; }

.lede {
  color: var(--muted); font-size: clamp(1rem, 2.2vw, 1.1rem);
  max-width: 50ch; margin-top: 22px;
}
.lede strong { color: var(--text); font-weight: 600; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(2, 1fr);
  margin: 52px 0 0; border-top: 1px solid var(--line);
}
.hero-stats > div {
  padding: 18px 18px 18px 0;
  border-bottom: 1px solid var(--line);
}
.hero-stats dt { color: var(--dim); font-size: .74rem; text-transform: uppercase; letter-spacing: .09em; }
.hero-stats dd {
  margin: 6px 0 0; font-size: 1.55rem; font-weight: 650; letter-spacing: -.035em; color: var(--text);
}
.hero-stats dd span { font-size: .95rem; color: var(--dim); font-weight: 500; }

@media (min-width: 720px) {
  .hero { padding: 88px 0 76px; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); max-width: 760px; border-bottom: 1px solid var(--line); }
  .hero-stats > div { border-bottom: 0; }
}

/* ── trust strip ───────────────────────────────────────── */
.strip { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip-grid { display: grid; gap: 30px; padding-top: 48px; padding-bottom: 48px; }
.strip-item svg {
  width: 22px; height: 22px; fill: none; stroke: var(--accent);
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 14px;
}
.strip-item svg .tick { stroke: var(--accent); }
.strip-item h3 { margin-bottom: 6px; }
.strip-item p { color: var(--muted); font-size: .92rem; }

@media (min-width: 640px) { .strip-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 44px; } }
@media (min-width: 1000px) { .strip-grid { grid-template-columns: repeat(4, 1fr); } }

/* ── sections ──────────────────────────────────────────── */
.section { padding: 68px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 600px; margin-bottom: 44px; }
.section-sub { color: var(--muted); margin-top: 14px; }
@media (min-width: 720px) { .section { padding: 96px 0; } }

/* ── plans ─────────────────────────────────────────────── */
.plans { display: grid; gap: 16px; }
@media (min-width: 620px)  { .plans { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .plans { grid-template-columns: repeat(4, 1fr); gap: 0; } }

.plan {
  position: relative; display: flex; flex-direction: column;
  background: var(--bg); border: 1px solid var(--line);
  border-radius: var(--r); padding: 26px 22px;
}
/* On wide screens the cards butt together into one ruled row. */
@media (min-width: 1000px) {
  .plan { border-radius: 0; border-left-width: 0; }
  .plan:first-child { border-left-width: 1px; border-radius: var(--r) 0 0 var(--r); }
  .plan:last-child  { border-radius: 0 var(--r) var(--r) 0; }
}
.plan.featured { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); background: var(--accent-wash); z-index: 1; border-left-width: 1px; }

.badge {
  position: absolute; top: -10px; left: 22px;
  background: var(--accent); color: var(--on-fill);
  font-size: .66rem; font-weight: 600; letter-spacing: .07em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 999px;
}
.plan-for { color: var(--dim); font-size: .83rem; margin-top: 6px; }

.price { margin: 20px 0 2px; font-size: 2.2rem; font-weight: 650; letter-spacing: -.045em; }
.price .cur { font-size: 1.05rem; font-weight: 500; vertical-align: super; margin-right: 1px; color: var(--dim); }
.price .per { font-size: .86rem; font-weight: 500; color: var(--dim); letter-spacing: 0; }

.speeds { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 18px 0; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sp-num  { font-size: 1.15rem; font-weight: 650; letter-spacing: -.03em; }
.sp-unit { font-size: .74rem; color: var(--muted); margin-left: 2px; }
.sp-lbl  { display: block; font-size: .66rem; color: var(--dim); text-transform: uppercase; letter-spacing: .08em; margin-top: 2px; }

.plan-feats { margin-bottom: 24px; display: grid; gap: 8px; }
.plan-feats li { position: relative; padding-left: 20px; color: var(--muted); font-size: .89rem; }
.plan-feats li::before {
  content: ""; position: absolute; left: 2px; top: .5em;
  width: 8px; height: 4px; border-left: 1.5px solid var(--accent); border-bottom: 1.5px solid var(--accent);
  transform: rotate(-45deg);
}
.plan .btn { margin-top: auto; }

/* recommender */
.recommender { margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--line); }
.recommender h3 { margin-bottom: 18px; }
.rec-controls { display: grid; gap: 16px; }
@media (min-width: 640px) { .rec-controls { grid-template-columns: 1fr 1fr; gap: 20px; max-width: 720px; } }
.rec-controls label { display: block; }
.rec-controls span { display: block; color: var(--dim); font-size: .78rem; margin-bottom: 7px; }
select, input {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  padding: 11px 12px; font: inherit; font-size: .94rem;
}
select:hover, input:hover { border-color: var(--text); }
.rec-out { margin-top: 20px; color: var(--muted); font-size: .94rem; min-height: 1.6em; max-width: 68ch; }
.rec-out em { color: var(--text); font-style: normal; font-weight: 650; }

/* ── guarantee band ────────────────────────────────────── */
.guarantee {
  padding: 62px 0 88px;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 720px) { .guarantee { padding: 84px 0 116px; } }

.guarantee-inner { display: grid; gap: 40px; }
@media (min-width: 900px) {
  .guarantee-inner { grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
}
.guarantee-lead h2 { margin-bottom: 16px; }
.guarantee-lead p { color: var(--muted); max-width: 42ch; }

.guarantee-points { display: grid; gap: 24px; }
.guarantee-points li { position: relative; padding-left: 28px; }
.guarantee-points li::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 10px; height: 5px;
  border-left: 1.5px solid var(--accent); border-bottom: 1.5px solid var(--accent);
  transform: rotate(-45deg);
}
.guarantee-points h3 { margin-bottom: 5px; }
.guarantee-points p { color: var(--muted); font-size: .92rem; max-width: 52ch; }

/* ── why ───────────────────────────────────────────────── */
.why-copy { max-width: 62ch; }
.why-copy h2 { margin-bottom: 18px; }
.why-copy p { color: var(--muted); margin-bottom: 14px; }
.why-copy strong { color: var(--text); }
.why-list { display: grid; gap: 14px; margin-top: 26px; }
.why-list li { position: relative; padding-left: 18px; color: var(--muted); font-size: .94rem; }
.why-list li::before {
  content: ""; position: absolute; left: 0; top: .68em;
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent);
}
.why-list strong { color: var(--text); }

/* ── steps + coverage ──────────────────────────────────── */
.steps { display: grid; gap: 28px; }
@media (min-width: 820px) { .steps { grid-template-columns: repeat(3, 1fr); gap: 40px; } }
.steps li { padding-top: 20px; border-top: 2px solid var(--accent); }
.step-n {
  display: block; margin-bottom: 12px;
  font-size: .78rem; font-weight: 600; color: var(--accent-ink);
  font-variant-numeric: tabular-nums;
}
.step-n::after { content: " / 3"; color: var(--line-strong); }
.steps h3 { margin-bottom: 7px; }
.steps p { color: var(--muted); font-size: .92rem; }

.coverage-box { margin-top: 44px; padding-top: 32px; border-top: 1px solid var(--line); }
.coverage-box h3 { margin-bottom: 16px; }
.areas { display: flex; flex-wrap: wrap; gap: 8px; }
.areas li {
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  padding: 6px 13px; font-size: .87rem; color: var(--muted);
}
.areas li.soon { border-style: dashed; }
.areas li.soon span { color: var(--dim); font-size: .74rem; margin-left: 4px; }
.areas-note { color: var(--dim); font-size: .87rem; margin-top: 18px; max-width: 60ch; }

/* ── signup ────────────────────────────────────────────── */
.signup-grid { display: grid; gap: 44px; align-items: start; }
@media (min-width: 900px) { .signup-grid { grid-template-columns: 1fr .85fr; gap: 64px; } }

.contact-list { display: grid; gap: 14px; margin: 28px 0 24px; }
.contact-list li { display: flex; align-items: center; gap: 12px; }
.contact-list svg {
  width: 17px; height: 17px; flex: none; fill: none; stroke: var(--text);
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.contact-list svg .solid { fill: var(--text); stroke: none; }
.contact-list a { color: var(--text); text-decoration: none; font-weight: 500; }
.contact-list a:hover { text-decoration: underline; }
.hours { color: var(--dim); font-size: .87rem; }

.signup-form { background: var(--bg); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px 22px; }
.signup-form h3 { margin-bottom: 20px; }
.signup-form label { display: block; color: var(--dim); font-size: .78rem; margin: 16px 0 6px; }
.signup-form label:first-of-type { margin-top: 0; }
.signup-form .btn { margin-top: 24px; }
.form-note { color: var(--dim); font-size: .78rem; margin-top: 12px; text-align: center; }

/* ── faq ───────────────────────────────────────────────── */
.faq { display: grid; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 20px 32px 20px 0;
  font-weight: 600; font-size: .98rem; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 6px; top: 50%;
  width: 7px; height: 7px; margin-top: -5px;
  border-right: 1.5px solid var(--dim); border-bottom: 1.5px solid var(--dim);
  transform: rotate(45deg); transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: -1px; }
.faq details p { color: var(--muted); font-size: .93rem; padding-bottom: 22px; max-width: 68ch; }

/* ── final cta ─────────────────────────────────────────── */
.final-cta { text-align: center; padding: 80px 0; border-top: 1px solid var(--line); }
.final-cta h2 { margin-bottom: 12px; }
.final-cta p { color: var(--muted); margin-bottom: 28px; }

/* ── footer ────────────────────────────────────────────── */
.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding: 48px 0 30px; }
.footer-grid { display: grid; gap: 28px; }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1fr auto; align-items: start; } }
.footer-tag { color: var(--dim); font-size: .87rem; margin-top: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: .9rem; }
.footer-links a:hover { color: var(--text); }
.footer-legal {
  display: grid; gap: 6px; margin-top: 36px; padding-top: 22px;
  border-top: 1px solid var(--line); color: var(--dim); font-size: .79rem;
}
@media (min-width: 720px) {
  .footer-legal { grid-template-columns: 1fr auto; }
  .footer-legal p:last-child { text-align: right; }
}