/* ============================================================================
   Response Central — Marketing site
   "Frosted Daylight": light canvas, iridescent pastel light-leaks, frosted
   glass, heavy black display type, SF Pro, soft squircles, black pill CTAs.
   ============================================================================ */

:root {
  /* canvas */
  --bg: #F4F5F7;
  --surface: rgba(255, 255, 255, 0.62);
  --surface-solid: #FFFFFF;
  --card-muted: #F1F0F4;
  --border: rgba(10, 10, 11, 0.07);

  /* ink */
  --fg: #0A0A0B;
  --fg-muted: #6C6C72;
  --fg-faint: #A6A6AC;

  --accent: #5B5BF0;

  /* iridescence */
  --grad: linear-gradient(135deg, #C7B8F5 0%, #F6C9B6 52%, #B8D4F5 100%);
  --grad-soft: linear-gradient(135deg, #DAD0F9 0%, #FADFD2 52%, #D5E5FA 100%);

  /* radius ladder */
  --r-1: 8px;
  --r-2: 16px;
  --r-3: 28px;
  --r-4: 44px;
  --r-pill: 999px;

  /* spacing ladder */
  --s-1: 8px;
  --s-2: 16px;
  --s-3: 32px;
  --s-4: 48px;

  --shadow-soft: 0 2px 8px rgba(20, 20, 40, 0.04), 0 18px 48px rgba(20, 20, 40, 0.07);
  --shadow-float: 0 24px 60px rgba(20, 20, 40, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.7);

  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
    'Inter', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
}

/* ---- Iridescent background blobs ------------------------------------------ */
.bg-field {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  will-change: transform;
}
.blob.b1 {
  width: 620px; height: 620px;
  background: radial-gradient(circle at 30% 30%, #C7B8F5, transparent 70%);
  top: -180px; left: -120px;
  animation: drift1 26s ease-in-out infinite alternate;
}
.blob.b2 {
  width: 560px; height: 560px;
  background: radial-gradient(circle at 40% 40%, #F6C9B6, transparent 70%);
  top: 8%; right: -160px;
  animation: drift2 30s ease-in-out infinite alternate;
}
.blob.b3 {
  width: 680px; height: 680px;
  background: radial-gradient(circle at 50% 50%, #B8D4F5, transparent 70%);
  bottom: -240px; left: 18%;
  animation: drift3 34s ease-in-out infinite alternate;
}
@keyframes drift1 { to { transform: translate(80px, 60px) scale(1.08); } }
@keyframes drift2 { to { transform: translate(-70px, 90px) scale(1.12); } }
@keyframes drift3 { to { transform: translate(60px, -70px) scale(1.06); } }

/* ---- Layout --------------------------------------------------------------- */
.wrap { width: min(var(--maxw), 100% - 40px); margin-inline: auto; }
section { padding-block: clamp(64px, 9vw, 120px); position: relative; }
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent);
  display: inline-flex; align-items: center; gap: 8px;
}
.section-head { max-width: 680px; margin-bottom: var(--s-4); }
.section-head h2 {
  font-size: clamp(28px, 4.4vw, 46px); font-weight: 800;
  letter-spacing: -0.025em; line-height: 1.05; margin-top: 14px;
}
.section-head p { font-size: 18px; color: var(--fg-muted); margin-top: 16px; }

/* ---- Glass primitive ------------------------------------------------------ */
.glass {
  background: var(--surface);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-soft);
}

/* ---- Nav ------------------------------------------------------------------ */
header.nav {
  position: sticky; top: 0; z-index: 50;
  padding-block: 12px;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 10px 12px 10px 18px;
  border-radius: var(--r-pill);
  margin-top: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700;
  letter-spacing: -0.02em; font-size: 17px; text-decoration: none; color: var(--fg); }
.brand img { width: 30px; height: 30px; object-fit: contain;
  filter: drop-shadow(0 4px 10px rgba(180, 140, 200, 0.4)); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { text-decoration: none; color: var(--fg-muted); font-size: 15px;
  font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--fg); }

/* ---- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  border-radius: var(--r-pill); padding: 13px 24px; text-decoration: none;
  border: 1px solid transparent; transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.2s;
  white-space: nowrap;
}
.btn-primary { background: var(--fg); color: #fff; box-shadow: 0 8px 24px rgba(10, 10, 11, 0.22); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(10, 10, 11, 0.28); }
.btn-ghost { background: rgba(255, 255, 255, 0.6); color: var(--fg); border-color: var(--border);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.btn-ghost:hover { transform: translateY(-2px); background: #fff; }
.btn-lg { padding: 16px 30px; font-size: 16px; }

/* ---- Hero ----------------------------------------------------------------- */
.hero { padding-top: clamp(40px, 6vw, 72px); text-align: center; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px 7px 8px; border-radius: var(--r-pill);
  font-size: 13px; font-weight: 600; color: var(--fg-muted); margin-bottom: 28px;
}
.hero .badge .dot { width: 8px; height: 8px; border-radius: 50%;
  background: #34D399; box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18); }
.hero h1 {
  font-size: clamp(40px, 7vw, 78px); font-weight: 800; letter-spacing: -0.035em;
  line-height: 1.02; max-width: 14ch; margin-inline: auto;
}
.hero h1 .grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .sub {
  font-size: clamp(17px, 2.2vw, 21px); color: var(--fg-muted);
  max-width: 56ch; margin: 26px auto 0;
}
.hero .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  margin-top: 36px; }
.hero .trust { margin-top: 22px; font-size: 14px; color: var(--fg-faint); }

/* hero product visual */
.hero-visual {
  margin-top: clamp(48px, 7vw, 80px); position: relative;
  border-radius: var(--r-4); padding: clamp(20px, 3vw, 36px);
  overflow: hidden;
}
.hero-visual::before {
  content: ""; position: absolute; inset: 0; background: var(--grad-soft);
  opacity: 0.5; z-index: -1;
}
.mock {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 18px; text-align: left;
}
.mock-col h4 { font-size: 13px; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--fg-faint); margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px; }
.mention {
  background: var(--surface-solid); border: 1px solid var(--border);
  border-radius: var(--r-2); padding: 16px; margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(20, 20, 40, 0.04);
}
.mention .top { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.mention .av { width: 30px; height: 30px; border-radius: 50%; background: var(--grad);
  flex-shrink: 0; }
.mention .who { font-weight: 600; font-size: 14px; }
.mention .src { font-size: 12px; color: var(--fg-faint); margin-left: auto; }
.mention p { font-size: 14px; color: var(--fg-muted); }
.pri { display: inline-flex; align-items: center; gap: 6px; font-size: 11px;
  font-weight: 700; padding: 3px 9px; border-radius: var(--r-pill); margin-top: 10px; }
.pri.hot { background: rgba(255, 77, 79, 0.12); color: #D6383A; }
.pri.warm { background: rgba(245, 166, 35, 0.14); color: #B5740A; }
.pri.calm { background: rgba(52, 211, 153, 0.14); color: #1A8F66; }
.reply-card {
  background: var(--surface); -webkit-backdrop-filter: blur(24px) saturate(180%);
  backdrop-filter: blur(24px) saturate(180%); border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--r-3); padding: 18px; box-shadow: var(--shadow-float);
}
.reply-card .orb-line { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.reply-card .orb { width: 26px; height: 26px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, #F6C9B6 40%, #C7B8F5 80%);
  box-shadow: 0 0 14px rgba(199, 184, 245, 0.7); }
.reply-card .orb-line span { font-size: 13px; font-weight: 600; color: var(--fg-muted); }
.reply-card .draft { font-size: 14px; line-height: 1.55; color: var(--fg); }
.reply-card .draft b { font-weight: 600; }
.reply-card .actions { display: flex; gap: 8px; margin-top: 16px; }
.mini-pill { font-size: 13px; font-weight: 600; padding: 9px 16px; border-radius: var(--r-pill); }
.mini-pill.dark { background: var(--fg); color: #fff; }
.mini-pill.light { background: rgba(255, 255, 255, 0.7); color: var(--fg); border: 1px solid var(--border); }

/* ---- Logos / social proof strip ------------------------------------------ */
.proof { text-align: center; padding-block: clamp(40px, 6vw, 64px); }
.proof p { font-size: 13px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--fg-faint); margin-bottom: 22px; }
.proof .row { display: flex; flex-wrap: wrap; justify-content: center; gap: 18px 40px;
  align-items: center; }
.proof .logo {
  font-size: 19px; font-weight: 700; letter-spacing: -0.02em; color: var(--fg-muted);
  opacity: 0.62; transition: opacity 0.2s;
}
.proof .logo:hover { opacity: 1; }

/* ---- Problem -------------------------------------------------------------- */
.prob-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.prob-card { padding: var(--s-3); border-radius: var(--r-3); }
.prob-card .ic { width: 44px; height: 44px; border-radius: var(--r-2);
  display: grid; place-items: center; background: var(--grad-soft); margin-bottom: 18px; }
.prob-card .ic svg { width: 22px; height: 22px; stroke: var(--fg); }
.prob-card h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.prob-card p { font-size: 15px; color: var(--fg-muted); margin-top: 8px; }

/* ---- How it works --------------------------------------------------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.step { padding: var(--s-3); border-radius: var(--r-3); position: relative; }
.step .num {
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: 15px; color: #fff; background: var(--fg); margin-bottom: 18px;
}
.step h3 { font-size: 17px; font-weight: 700; }
.step p { font-size: 14px; color: var(--fg-muted); margin-top: 8px; }
.step .arrow { position: absolute; right: -12px; top: 38px; color: var(--fg-faint);
  font-size: 20px; z-index: 2; }

/* ---- Features ------------------------------------------------------------- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feat { padding: var(--s-3); border-radius: var(--r-3); }
.feat.span2 { grid-column: span 2; }
.feat .ic { width: 40px; height: 40px; border-radius: var(--r-2); display: grid;
  place-items: center; background: rgba(91, 91, 240, 0.1); margin-bottom: 16px; }
.feat .ic svg { width: 20px; height: 20px; stroke: var(--accent); }
.feat h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.feat p { font-size: 15px; color: var(--fg-muted); margin-top: 8px; }

/* ---- Pricing -------------------------------------------------------------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.plan { padding: var(--s-3); border-radius: var(--r-3); display: flex; flex-direction: column; }
.plan.featured {
  background: var(--fg); color: #fff; position: relative;
  box-shadow: 0 30px 70px rgba(10, 10, 11, 0.3); transform: translateY(-8px);
  border: none;
}
.plan.featured::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--r-3); padding: 1.5px;
  background: var(--grad); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.plan .tag { font-size: 14px; font-weight: 700; letter-spacing: -0.01em; }
.plan.featured .best {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #0A0A0B; font-size: 12px; font-weight: 800;
  letter-spacing: 0.03em; padding: 5px 14px; border-radius: var(--r-pill);
  text-transform: uppercase;
}
.plan .price { margin-top: 16px; display: flex; align-items: baseline; gap: 6px; }
.plan .price .amt { font-size: 40px; font-weight: 800; letter-spacing: -0.03em; }
.plan .price .per { font-size: 15px; color: var(--fg-muted); }
.plan.featured .price .per { color: rgba(255, 255, 255, 0.65); }
.plan .seats { font-size: 14px; color: var(--fg-muted); margin-top: 4px; }
.plan.featured .seats { color: rgba(255, 255, 255, 0.7); }
.plan ul { list-style: none; margin-top: 22px; margin-bottom: 26px; display: grid; gap: 12px; }
.plan li { font-size: 14px; display: flex; align-items: flex-start; gap: 10px; color: var(--fg-muted); }
.plan.featured li { color: rgba(255, 255, 255, 0.85); }
.plan li svg { width: 18px; height: 18px; flex-shrink: 0; stroke: var(--accent); margin-top: 1px; }
.plan.featured li svg { stroke: #F6C9B6; }
.plan .btn { margin-top: auto; width: 100%; }
.plan.featured .btn-primary { background: #fff; color: var(--fg); }
.price-foot { text-align: center; margin-top: 26px; font-size: 14px; color: var(--fg-faint); }

/* ---- CTA ------------------------------------------------------------------ */
.cta-band {
  border-radius: var(--r-4); padding: clamp(40px, 6vw, 72px); text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::before { content: ""; position: absolute; inset: 0; background: var(--grad-soft);
  opacity: 0.6; z-index: -1; }
.cta-band img.orb { width: 78px; height: 78px; object-fit: contain; margin-bottom: 8px;
  filter: drop-shadow(0 10px 30px rgba(199, 184, 245, 0.5)); }
.cta-band h2 { font-size: clamp(28px, 4.5vw, 48px); font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.05; max-width: 18ch; margin-inline: auto; }
.cta-band p { font-size: 18px; color: var(--fg-muted); margin: 18px auto 0; max-width: 50ch; }
.cta-band .cta-row { margin-top: 32px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---- Footer --------------------------------------------------------------- */
footer { padding-block: var(--s-4) var(--s-4); }
.foot-inner { display: flex; justify-content: space-between; align-items: center;
  gap: 24px; flex-wrap: wrap; padding-top: var(--s-3); border-top: 1px solid var(--border); }
.foot-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.foot-brand img { width: 26px; height: 26px; }
.foot-links { display: flex; gap: 24px; flex-wrap: wrap; }
.foot-links a { color: var(--fg-muted); text-decoration: none; font-size: 14px; }
.foot-links a:hover { color: var(--fg); }
.foot-copy { font-size: 13px; color: var(--fg-faint); width: 100%; margin-top: 18px; }

/* ---- Responsive ----------------------------------------------------------- */
@media (max-width: 880px) {
  .nav-links { display: none; }
  .mock { grid-template-columns: 1fr; }
  .prob-grid, .feat-grid, .steps { grid-template-columns: 1fr; }
  .feat.span2 { grid-column: span 1; }
  .price-grid { grid-template-columns: 1fr; }
  .plan.featured { transform: none; }
  .step .arrow { display: none; }
}
@media (max-width: 480px) {
  .wrap { width: min(var(--maxw), 100% - 28px); }
  .hero h1 { letter-spacing: -0.03em; }
  .hero .cta-row .btn { width: 100%; }
  .brand { font-size: 0; gap: 0; }
  .brand img { width: 32px; height: 32px; }
  .nav-inner { padding: 8px 8px 8px 12px; }
  .btn { padding: 11px 18px; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; }
  html { scroll-behavior: auto; }
  .btn:hover { transform: none; }
}