/* ==========================================================================
   YappHub — marketing site
   Brand tokens first; everything else reads from them. Light by default,
   dark via prefers-color-scheme.
   ========================================================================== */

:root {
  --violet: #6C3BFF;
  --violet-ink: #5a2ee6;
  --coral: #E8383D;
  --sun: #FFD23F;
  --pink: #FF9BB0;
  --teal: #2EC4B6;

  --bg: #FFF8EE;
  --bg-tint: #F6EEFF;
  --surface: #FFFFFF;
  --ink: #1A1530;
  --muted: #57506B;
  --line: #1A1530;
  --soft-line: rgba(26, 21, 48, .12);
  --accent-text: var(--violet);
  --on-accent: #FFFFFF;
  --shadow: 6px 6px 0 var(--line);
  --shadow-sm: 4px 4px 0 var(--line);

  --font-display: "Bricolage Grotesque", "Arial Black", system-ui, sans-serif;
  --font-body: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 22px;
  --wrap: 1160px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #120F1F;
    --bg-tint: #1A1530;
    --surface: #1F1A36;
    --ink: #FFF8EE;
    --muted: #BDB5D4;
    --line: #FFF8EE;
    --soft-line: rgba(255, 248, 238, .14);
    --accent-text: #B49BFF;
    --shadow: 6px 6px 0 #000;
    --shadow-sm: 4px 4px 0 #000;
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 800; line-height: 1.05; letter-spacing: -.02em; margin: 0; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--violet); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 100; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-weight: 700; text-decoration: none; }
.skip:focus { top: 12px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 700 13px/1 var(--font-body); letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent-text); margin-bottom: 14px;
}
.eyebrow .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 4px rgba(232, 56, 61, .2); animation: pulse 2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 9px rgba(232, 56, 61, 0); } }

.hl { color: var(--accent-text); }
.marker {
  position: relative; white-space: nowrap; z-index: 0;
  background: linear-gradient(transparent 58%, var(--sun) 58%, var(--sun) 90%, transparent 90%);
  padding: 0 .08em;
}
@media (prefers-color-scheme: dark) { .marker { background: linear-gradient(transparent 58%, var(--violet) 58%, var(--violet) 90%, transparent 90%); } }

/* ---------- buttons ---------- */
.btn {
  --b: var(--surface); --c: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: 999px;
  border: 2.5px solid var(--line); background: var(--b); color: var(--c);
  font: 700 15px/1.1 var(--font-body); text-decoration: none; cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--line); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--line); }
@media (prefers-color-scheme: dark) { .btn:hover { box-shadow: 6px 6px 0 #000; } .btn:active { box-shadow: 1px 1px 0 #000; } }
.btn--primary { --b: var(--violet); --c: #fff; }
.btn--login { --b: var(--sun); --c: #1A1530; }
.btn--ghost { --b: transparent; }
.btn--lg { padding: 15px 24px; font-size: 16.5px; }
.btn--sm { padding: 8px 14px; font-size: 14px; box-shadow: 3px 3px 0 var(--line); }
.btn--block { width: 100%; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav.is-scrolled { border-bottom-color: var(--soft-line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 16px; }
.brand img { height: 60px; width: auto; }
.nav__menu { display: flex; align-items: center; gap: 26px; }
.nav__menu > a:not(.btn) { font-weight: 600; font-size: 15px; text-decoration: none; position: relative; }
.nav__menu > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 3px; border-radius: 3px;
  background: var(--coral); transform: scaleX(0); transform-origin: left; transition: transform .2s;
}
.nav__menu > a:not(.btn):hover::after { transform: scaleX(1); }
.nav__toggle { display: none; }

@media (max-width: 880px) {
  .nav__toggle {
    display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px;
    border: 2.5px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer;
  }
  .burger, .burger::before, .burger::after { display: block; width: 20px; height: 2.5px; border-radius: 2px; background: currentColor; transition: transform .2s; position: relative; content: ""; }
  .burger::before { position: absolute; top: -6px; }
  .burger::after { position: absolute; top: 6px; }
  .nav__toggle[aria-expanded="true"] .burger { background: transparent; }
  .nav__toggle[aria-expanded="true"] .burger::before { transform: translateY(6px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] .burger::after { transform: translateY(-6px) rotate(-45deg); }
  .nav__menu {
    position: absolute; left: 16px; right: 16px; top: 76px;
    flex-direction: column; align-items: stretch; gap: 4px; padding: 14px;
    background: var(--surface); border: 2.5px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transform: translateY(-8px); transition: .2s ease;
  }
  .nav__menu.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__menu > a:not(.btn) { padding: 12px 10px; font-size: 17px; border-radius: 12px; }
  .nav__menu > a:not(.btn):hover { background: var(--bg-tint); }
  .nav__menu > a:not(.btn)::after { display: none; }
  .nav__menu .btn { margin-top: 8px; }
  .brand img { height: 50px; }
}

/* ---------- hero ---------- */
.hero { padding: 56px 0 72px; position: relative; }
.hero__grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(46px, 7.4vw, 92px); }
.lede { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 34em; margin-top: 22px; }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero__ticks { display: flex; flex-wrap: wrap; gap: 10px 22px; list-style: none; padding: 0; margin: 30px 0 0; font-weight: 600; font-size: 15px; }
.hero__ticks li { display: flex; align-items: center; gap: 8px; }
.hero__ticks li::before {
  content: ""; width: 20px; height: 20px; border-radius: 50%; flex: none;
  background: var(--teal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4 8-9' fill='none' stroke='%231A1530' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat;
}

.hero__art { position: relative; min-height: 470px; }
.blob {
  position: absolute; inset: 6% 2% 4% 10%;
  background: var(--violet);
  border-radius: 46% 54% 42% 58% / 52% 40% 60% 48%;
  border: 3px solid var(--line);
  box-shadow: var(--shadow);
  animation: wobble 12s ease-in-out infinite;
}
@keyframes wobble { 50% { border-radius: 58% 42% 55% 45% / 42% 58% 42% 58%; } }
.chat { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: 14px; padding: 30px 6% 30px 18%; }
.bubble {
  position: relative; display: flex; align-items: center; gap: 10px; max-width: 86%;
  padding: 12px 16px; border-radius: 20px; border: 2.5px solid var(--line);
  background: var(--surface); color: var(--ink); font-weight: 600; font-size: 15px; line-height: 1.35;
  box-shadow: var(--shadow-sm);
  opacity: 0; transform: translateY(14px) scale(.96);
  animation: pop .5s cubic-bezier(.2, 1.4, .4, 1) forwards;
}
.bubble--in { align-self: flex-start; border-bottom-left-radius: 6px; }
.bubble--out { align-self: flex-end; border-bottom-right-radius: 6px; background: var(--sun); color: #1A1530; }
.bubble--note { align-self: center; background: var(--ink); color: var(--bg); }
.bubble .pill { background: var(--coral); color: #fff; border-radius: 999px; padding: 3px 9px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.avatar { width: 30px; height: 30px; border-radius: 50%; flex: none; border: 2px solid var(--line); }
.a1 { background: linear-gradient(135deg, var(--pink), var(--coral)); }
.a2 { background: linear-gradient(135deg, var(--teal), var(--sun)); }
.b1 { animation-delay: .2s; } .b2 { animation-delay: .7s; } .b3 { animation-delay: 1.2s; } .b4 { animation-delay: 1.7s; } .b5 { animation-delay: 2.2s; }
@keyframes pop { to { opacity: 1; transform: none; } }
.hero__mouth {
  position: absolute; left: -2%; bottom: -4%; width: 170px; height: auto;
  filter: drop-shadow(4px 4px 0 rgba(0, 0, 0, .18));
  animation: yap 2.6s ease-in-out infinite; transform-origin: 30% 60%;
}
@keyframes yap { 0%, 100% { transform: rotate(-4deg); } 50% { transform: rotate(4deg) scale(1.04); } }

/* ---------- platform strip ---------- */
.strip { background: var(--ink); color: var(--bg); border-block: 3px solid var(--line); overflow: hidden; transform: rotate(-1.2deg); margin: 0 -10px; }
.strip__track { display: flex; width: max-content; animation: marquee 30s linear infinite; }
.strip span { font: 800 clamp(20px, 2.6vw, 30px)/1 var(--font-display); padding: 18px 26px; display: inline-flex; align-items: center; gap: 52px; white-space: nowrap; }
.strip span::after { content: "✦"; color: var(--sun); font-size: .7em; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- sections ---------- */
.section { padding: clamp(72px, 10vw, 120px) 0; }
.section--tint { background: var(--bg-tint); border-block: 1px solid var(--soft-line); }
.section__head { max-width: 760px; margin-bottom: 48px; }
.section h2 { font-size: clamp(34px, 4.8vw, 58px); }
.section__sub { color: var(--muted); font-size: 18px; margin-top: 18px; max-width: 38em; }

/* services: cards are speech bubbles */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px 26px; }
.card {
  position: relative; background: var(--surface); border: 2.5px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px 30px; box-shadow: var(--shadow);
  transition: transform .2s ease;
}
.card::after { /* speech-bubble tail */
  content: ""; position: absolute; left: 34px; bottom: -16px; width: 26px; height: 26px;
  background: var(--surface); border-right: 2.5px solid var(--line); border-bottom: 2.5px solid var(--line);
  transform: skewY(40deg) rotate(10deg); border-bottom-right-radius: 6px;
}
.card:hover { transform: translateY(-4px) rotate(-.6deg); }
.card__icon {
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 18px;
  background: var(--c); border: 2.5px solid var(--line);
}
.card__icon svg { width: 28px; height: 28px; fill: none; stroke: #1A1530; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 24px; margin-bottom: 10px; }
.card p { color: var(--muted); }
.card--cta { background: var(--violet); color: #fff; display: flex; flex-direction: column; align-items: flex-start; }
.card--cta::after { background: var(--violet); }
.card--cta p { color: rgba(255, 255, 255, .88); margin-bottom: 22px; }
.card--cta .btn { --b: var(--sun); --c: #1A1530; margin-top: auto; }

/* steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: s; position: relative; }
.step { background: var(--surface); border: 2.5px solid var(--line); border-radius: var(--radius); padding: 26px 22px; box-shadow: var(--shadow-sm); }
.step__num {
  display: grid; place-items: center; width: 50px; height: 50px; margin-bottom: 16px;
  font: 800 24px/1 var(--font-display); color: #1A1530; background: var(--sun);
  border: 2.5px solid var(--line); border-radius: 50% 50% 50% 8px;
}
.step:nth-child(2) .step__num { background: var(--pink); }
.step:nth-child(3) .step__num { background: var(--teal); }
.step:nth-child(4) .step__num { background: #B49BFF; }
.step h3 { font-size: 22px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 16px; }

.portal {
  margin-top: 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
  background: var(--ink); color: var(--bg); border-radius: var(--radius); padding: 30px 34px;
  border: 2.5px solid var(--line); box-shadow: var(--shadow);
}
.portal h3 { font-size: 28px; margin-bottom: 8px; }
.portal p { opacity: .85; max-width: 40em; }
.portal .btn { flex: none; }

/* results */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.metric { border-top: 3px solid var(--line); padding-top: 18px; }
.metric__label { font: 800 30px/1 var(--font-display); display: block; margin-bottom: 10px; }
.metric:nth-child(1) .metric__label { color: var(--coral); }
.metric:nth-child(2) .metric__label { color: var(--accent-text); }
.metric:nth-child(3) .metric__label { color: var(--teal); }
.metric:nth-child(4) .metric__label { color: #E0A800; }
.metric p { color: var(--muted); }

.stories { margin-top: 56px; display: flex; align-items: flex-end; gap: 18px; }
.stories__bubble {
  position: relative; max-width: 720px; background: var(--surface); border: 2.5px solid var(--line);
  border-radius: 28px 28px 28px 8px; padding: 28px 30px; box-shadow: var(--shadow);
}
.stories__kicker { font: 800 26px/1.15 var(--font-display); margin-bottom: 10px; }
.stories__text { color: var(--muted); font-size: 18px; }
.stories__typing { display: flex; gap: 6px; padding: 14px 18px; border-radius: 999px; background: var(--surface); border: 2.5px solid var(--line); }
.stories__typing span { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); animation: typing 1.2s infinite; }
.stories__typing span:nth-child(2) { animation-delay: .15s; }
.stories__typing span:nth-child(3) { animation-delay: .3s; }
@keyframes typing { 0%, 60%, 100% { transform: none; opacity: .4; } 30% { transform: translateY(-5px); opacity: 1; } }

/* testimonial card (for later use) */
.quote { margin: 0; background: var(--surface); border: 2.5px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm); }
.quote blockquote { margin: 0 0 14px; font: 600 19px/1.45 var(--font-body); }
.quote figcaption { color: var(--muted); font-size: 15px; }

/* pricing */
.pricing {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px 48px; align-items: center;
  background: var(--surface); border: 2.5px solid var(--line); border-radius: 32px; padding: clamp(28px, 5vw, 56px); box-shadow: var(--shadow);
}
.pricing__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; font-weight: 600; }
.pricing__list li { display: flex; gap: 12px; align-items: center; padding: 14px 16px; border-radius: 14px; background: var(--bg-tint); }
.pricing__list li::before { content: "✦"; color: var(--coral); }
.pricing .btn { grid-column: 1 / -1; justify-self: start; }

/* contact */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact h2 { font-size: clamp(54px, 9vw, 110px); }
.contact__email { display: inline-block; margin: 28px 14px 0 0; font: 800 clamp(22px, 3vw, 32px)/1.2 var(--font-display); color: var(--accent-text); text-decoration: none; border-bottom: 3px solid currentColor; overflow-wrap: anywhere; }
.contact__email:hover { color: var(--coral); }
.contact .btn--sm { vertical-align: 4px; margin-top: 16px; }
.form { background: var(--surface); border: 2.5px solid var(--line); border-radius: 28px; padding: 30px; box-shadow: var(--shadow); display: grid; gap: 18px; }
.field { display: grid; gap: 7px; }
.field label { font-weight: 700; font-size: 15px; }
.field .opt { font-weight: 500; color: var(--muted); }
.field input, .field textarea {
  font: inherit; color: var(--ink); background: var(--bg); width: 100%;
  border: 2px solid var(--soft-line); border-radius: 14px; padding: 12px 14px; resize: vertical;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--violet); box-shadow: 0 0 0 4px rgba(108, 59, 255, .2); }
.field [aria-invalid="true"] { border-color: var(--coral); }
.form__note { font-size: 14px; color: var(--muted); text-align: center; }

/* footer */
.footer { background: var(--bg-tint); border-top: 1px solid var(--soft-line); padding: 56px 0 28px; }
.footer__grid { display: grid; grid-template-columns: 1.2fr 1fr auto; gap: 32px; align-items: start; }
.footer__grid img { height: 58px; width: auto; }
.footer__tag { margin-top: 10px; color: var(--muted); font-weight: 600; }
.footer__nav { display: grid; gap: 8px; }
.footer__nav a { text-decoration: none; font-weight: 600; }
.footer__nav a:hover { color: var(--accent-text); }
.footer__login p { font-weight: 700; margin-bottom: 10px; }
.footer__base { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--soft-line); color: var(--muted); font-size: 14px; }
.footer__base a { text-decoration: none; }

/* scroll reveal (only when JS is on) */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .hero__grid { grid-template-columns: 1fr; gap: 28px; }
  .hero__art { min-height: 420px; max-width: 560px; width: 100%; margin-inline: auto; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
  .contact__grid, .pricing { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__login { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding-top: 32px; }
  .hero__art { min-height: 360px; }
  .chat { padding: 24px 4% 24px 12%; }
  .bubble { font-size: 14px; }
  .hero__mouth { width: 96px; left: -3%; bottom: -9%; }
  .b4 { align-self: flex-end; }
  .cards, .steps, .metrics { grid-template-columns: 1fr; }
  .portal { flex-direction: column; align-items: flex-start; padding: 26px 22px; }
  .stories { flex-direction: column; align-items: flex-start; }
  .form { padding: 22px; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__ctas .btn { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
  .strip__track { animation: none; }
  .bubble { opacity: 1; transform: none; }
}