@layer reset, tokens, base, layout, components, chrome, utilities;

/* ============================================================
   Sleevenine Program — Shared Design Foundation: COMPONENTS
   Requires tokens.css. Mobile-first. Adapt per brand; do not
   cargo-cult — elevate, don't clone.
   ============================================================ */

@layer reset {
/* ---- Reset-ish ---- */
*, *::before, *::after { box-sizing: border-box; }
}

@layer base {
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ink-900);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-600); }
:focus-visible {
  outline: 3px solid var(--brand-600);
  outline-offset: 2px;
  border-radius: 4px;
}
}

@layer layout {
/* ---- Layout ---- */
.container { width: min(100% - 2.5rem, var(--container)); margin-inline: auto; }
.container-narrow { width: min(100% - 2.5rem, var(--container-narrow)); margin-inline: auto; }
.section { padding-block: var(--section-pad); }
.section-alt { background: var(--paper-2); }
}

@layer components {
/* ---- Type ---- */
.display, h1, h2 {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-tight);
  text-wrap: balance;
}
.hero-title { font-size: var(--text-hero); margin: 0 0 var(--s6); }
.h1 { font-size: var(--text-h1); margin: 0 0 var(--s4); }
.h2 { font-size: var(--text-h2); margin: 0 0 var(--s4); }
.h3 { font-size: var(--text-h3); font-weight: 650; margin: 0 0 var(--s2); line-height: var(--leading-snug); }
.lead { font-size: var(--text-lead); color: var(--ink-500); max-width: 42rem; }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--s2);
  font-size: var(--text-caption); font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--brand-700); margin-bottom: var(--s4);
}
.eyebrow::before { content: ""; width: 1.5rem; height: 2px; background: var(--brand-600); border-radius: 2px; }
.muted { color: var(--ink-500); }
.small { font-size: var(--text-small); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s2);
  font-weight: 650; font-size: var(--text-body); line-height: 1;
  padding: 0.9rem 1.6rem; border-radius: var(--radius-pill);
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), background var(--dur);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--brand-600); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { background: var(--brand-700); box-shadow: var(--shadow-lg); color: #fff; }
.btn-secondary {
  background: var(--paper); color: var(--ink-900);
  border-color: var(--line); box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { border-color: var(--ink-400); color: var(--ink-900); }
.btn-lg { padding: 1.1rem 2.1rem; font-size: 1.0625rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--s3); margin-top: var(--s8); }

/* ---- Hero ---- */
.hero { padding-block: clamp(3rem, 2rem + 7vw, 6.5rem) var(--section-pad); position: relative; overflow: clip; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(42rem 26rem at 85% -5%, color-mix(in srgb, var(--brand-600) 10%, transparent), transparent 65%),
    radial-gradient(30rem 20rem at 8% 10%, color-mix(in srgb, var(--accent-500) 8%, transparent), transparent 60%);
}
.hero > .container { position: relative; }
.hero-copy { max-width: 46rem; }
.hero-proof { display: flex; flex-wrap: wrap; gap: var(--s2) var(--s6); margin-top: var(--s8); padding: 0; list-style: none; }
.hero-proof li { display: flex; align-items: center; gap: var(--s2); font-size: var(--text-small); color: var(--ink-500); font-weight: 550; }
.hero-proof li::before { content: "✓"; color: var(--brand-600); font-weight: 800; }

/* ---- Feature grid ---- */
.grid-3 { display: grid; gap: var(--s6); grid-template-columns: 1fr; margin-top: var(--s8); }
@media (min-width: 56rem) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: var(--s8);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card-icon {
  width: 2.75rem; height: 2.75rem; border-radius: var(--radius-md);
  background: var(--brand-50); color: var(--brand-700);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.35rem; margin-bottom: var(--s4);
}
.card p { color: var(--ink-500); margin: var(--s2) 0 0; font-size: var(--text-small); }

/* ---- Split / how-it-works ---- */
.steps { display: grid; gap: var(--s6); margin-top: var(--s8); counter-reset: step; }
@media (min-width: 56rem) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step { position: relative; padding-top: var(--s8); border-top: 2px solid var(--line); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: calc(-1 * var(--s2)); left: 0;
  font-family: var(--font-display); font-size: 2.5rem; color: var(--brand-100);
  background: var(--paper); padding-right: var(--s3); line-height: 1;
}
.step p { color: var(--ink-500); font-size: var(--text-small); margin: var(--s2) 0 0; }

/* ---- CTA band ---- */
.cta-band {
  background: linear-gradient(135deg, var(--ink-950), var(--ink-900));
  color: #fff; border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 2rem + 4vw, 4.5rem);
  text-align: center; position: relative; overflow: clip;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(36rem 18rem at 50% -20%, color-mix(in srgb, var(--brand-600) 35%, transparent), transparent 70%);
}
.cta-band > * { position: relative; }
.cta-band h2 { color: #fff; margin: 0 0 var(--s4); font-size: var(--text-h2); }
.cta-band p { color: rgb(255 255 255 / 0.72); max-width: 36rem; margin: 0 auto var(--s6); }
.cta-band .btn-row { justify-content: center; }

/* ---- Utility ---- */
.kicker-row { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s4); flex-wrap: wrap; }
.divider { border: 0; border-top: 1px solid var(--line); margin: var(--s12) 0; }
.stat-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s6); margin-top: var(--s8); }
@media (min-width: 56rem) { .stat-row { grid-template-columns: repeat(4, 1fr); } }
.stat-num { font-family: var(--font-display); font-size: var(--text-h2); color: var(--ink-950); }
.stat-label { font-size: var(--text-small); color: var(--ink-500); }
}

@layer base {
  .skip {
    position: absolute; left: 1rem; top: -5rem; z-index: 100;
    padding: .6rem .9rem; background: var(--paper); color: var(--ink-900);
    font-weight: 700; border-radius: 999px;
  }
  .skip:focus { top: .5rem; }
}

@layer chrome {
/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s4); padding-block: var(--s3);
}
.brandmark { display: inline-flex; align-items: center; gap: var(--s2); font-weight: 750; font-size: 1.0625rem; color: var(--ink-950); text-decoration: none; }
.brandmark-mark {
  width: 2rem; height: 2rem; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--brand-600), var(--accent-500));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--font-display); font-size: 1.1rem;
}
.nav-links { display: none; gap: var(--s6); list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink-700); text-decoration: none; font-weight: 550; font-size: var(--text-small); }
.nav-links a:hover { color: var(--brand-700); }
@media (min-width: 56rem) { .nav-links { display: flex; } .nav-cta .btn { padding: 0.65rem 1.25rem; font-size: var(--text-small); } }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--line); padding-block: var(--s12) var(--s8); margin-top: var(--section-pad); }
.footer-grid { display: grid; gap: var(--s8); grid-template-columns: 1fr; }
@media (min-width: 56rem) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer h4 { font-size: var(--text-caption); text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-400); margin: 0 0 var(--s3); }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s2); }
.footer a { color: var(--ink-500); text-decoration: none; font-size: var(--text-small); }
.footer a:hover { color: var(--brand-700); }
.footer-base {
  display: flex; flex-wrap: wrap; gap: var(--s2) var(--s6); justify-content: space-between;
  margin-top: var(--s12); padding-top: var(--s6); border-top: 1px solid var(--line);
  font-size: var(--text-caption); color: var(--ink-400);
}

  .site-header { transition: box-shadow var(--dur-2) var(--ease-out); }
  .site-header.scrolled { box-shadow: var(--shadow-md); }
  .nav-links a[aria-current="page"] { color: var(--brand-700); font-weight: 700; }
  .nav-toggle { display: none; }
  .to-top { font-weight: 600; text-decoration: none; white-space: nowrap; }
  .to-top:hover { text-decoration: underline; }

  /* Show links from 48rem (SPEC) instead of the foundation's 56rem */
  @media (min-width: 48rem) {
    .nav-links { display: flex; }
  }

  @media (max-width: 47.99rem) {
    .nav-inner { flex-wrap: wrap; }
    /* Menu button only exists when JS is available to run it */
    .js .nav-toggle {
      display: inline-flex; align-items: center; gap: .55rem;
      min-height: 44px; padding: .5rem .9rem;
      border: 1px solid var(--line); border-radius: var(--radius-md);
      background: var(--paper); color: var(--ink-900);
      font: inherit; font-weight: 700; cursor: pointer;
    }
    .js .nav-toggle-bars,
    .js .nav-toggle-bars::before,
    .js .nav-toggle-bars::after {
      display: block; width: 1.05rem; height: 2px;
      background: currentColor; border-radius: 2px;
      transition: transform var(--dur-2) var(--ease-out), opacity var(--dur-1) var(--ease-out);
    }
    .js .nav-toggle-bars { position: relative; }
    .js .nav-toggle-bars::before,
    .js .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
    .js .nav-toggle-bars::before { top: -6px; }
    .js .nav-toggle-bars::after { top: 6px; }
    .js .nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
    .js .nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
    .js .nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }
    .js .site-nav {
      flex-basis: 100%; order: 4;
      display: grid; grid-template-rows: 0fr;
      opacity: 0; visibility: hidden;
      transition: grid-template-rows var(--dur-3) var(--ease-out), opacity var(--dur-2) var(--ease-out), visibility 0s var(--dur-3);
    }
    .js .site-nav > .nav-links {
      overflow: hidden; min-height: 0;
      display: flex; flex-direction: column; align-items: stretch; gap: 0;
    }
    .js .site-nav.open {
      grid-template-rows: 1fr; opacity: 1; visibility: visible;
      transition: grid-template-rows var(--dur-3) var(--ease-out), opacity var(--dur-2) var(--ease-out);
    }
    .js .site-nav .nav-links a { display: flex; align-items: center; min-height: 44px; width: 100%; }
    /* No-JS: links simply stack under the brand, fully usable */
    html:not(.js) .site-nav { flex-basis: 100%; order: 4; }
    html:not(.js) .nav-links { display: flex; flex-wrap: wrap; }
  }
}

@layer utilities {
  .js [data-reveal] {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
  }
  .js [data-reveal].in { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; }
}