/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #f5f0ea;
  --paper:     #ffffff;
  --glass:     rgba(255, 255, 255, 0.55);
  --glass-2:   rgba(255, 255, 255, 0.3);
  --glass-border: rgba(255, 255, 255, 0.6);
  --ink:       #1f2937;
  --ink-soft:  #4b5563;
  --ink-mute:  #7c8494;
  --accent:    #ff7a59;
  --accent-2:  #6366f1;
  --accent-3:  #16a34a;
  --line:      rgba(31, 41, 55, 0.12);
  --radius:    20px;
  --radius-sm: 12px;
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-1:  0 1px 2px rgba(31,41,55,0.06);
  --shadow-2:  0 12px 32px -12px rgba(31,41,55,0.18);
  --shadow-3:  0 24px 60px -20px rgba(31,41,55,0.28);
  --maxw:      1180px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { font-family: "Sora", "Inter", system-ui, sans-serif; text-wrap: balance; line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; }
ul, ol { padding-left: 1.2em; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--ink); color: #fff;
  z-index: 9999; border-radius: 8px; font-weight: 600;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--maxw); margin-inline: auto; padding-inline: 1.25rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.eyebrow { display: inline-flex; align-items: center; gap: .5rem; font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin-bottom: .75rem; }
.section { padding-block: clamp(3rem, 7vw, 6rem); position: relative; }
.section-head { max-width: 640px; margin-bottom: clamp(2rem, 5vw, 3rem); }
.section-head p { color: var(--ink-soft); font-size: 1.05rem; margin-top: .75rem; }
.mono-num { font-family: "JetBrains Mono", ui-monospace, monospace; }

/* =============================================================
   4. Typography
   ============================================================= */
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
.lede { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--ink-soft); }
article.prose h2 { margin-top: 2.2em; margin-bottom: .6em; }
article.prose h3 { margin-top: 1.6em; margin-bottom: .5em; }
article.prose p { margin-bottom: 1.1em; color: var(--ink-soft); font-size: 1.05rem; }
article.prose strong { color: var(--ink); }
article.prose ul, article.prose ol { margin-bottom: 1.1em; color: var(--ink-soft); }
article.prose li { margin-bottom: .4em; }
article.prose a { color: var(--accent-2); text-decoration: underline; text-underline-offset: 3px; }

/* =============================================================
   5. Components
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .9rem 1.6rem; border-radius: 999px; font-weight: 600; font-size: .98rem;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background .25s;
}
.btn-primary { background: var(--ink); color: #fff; box-shadow: var(--shadow-2); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-3); }
.btn-glass { background: var(--glass); border: 1px solid var(--glass-border); backdrop-filter: blur(16px) saturate(160%); -webkit-backdrop-filter: blur(16px) saturate(160%); color: var(--ink); }
@supports not (backdrop-filter: blur(1px)) { .btn-glass { background: rgba(255,255,255,0.85); } }
.btn-glass:hover { transform: translateY(-2px); }
.btn-block { width: 100%; }

.glass-card {
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-1);
}
@supports (backdrop-filter: blur(20px)) {
  .glass-card { background: var(--glass); backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%); }
}

.badge { display: inline-flex; align-items: center; gap: .4rem; padding: .3rem .7rem; border-radius: 999px; background: rgba(99,102,241,0.12); color: var(--accent-2); font-size: .78rem; font-weight: 700; }

/* =============================================================
   6. Nav
   ============================================================= */
.nav {
  position: sticky; top: 0; z-index: 100;
  padding-block: .85rem;
  background: rgba(245,240,234,0.75);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .5rem; font-family: "Sora", sans-serif; font-weight: 800; font-size: 1.15rem; color: var(--ink); }
.brand-mark { width: 30px; height: 30px; border-radius: 9px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); display: grid; place-items: center; color: #fff; font-size: .95rem; }
.nav-links { display: none; align-items: center; gap: 1.75rem; font-weight: 600; font-size: .95rem; }
.nav-links a { position: relative; padding-block: .3rem; color: var(--ink-soft); }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 2px; background: var(--accent); transition: right .3s var(--ease-out); }
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { right: 0; }
.nav-links a[aria-current="page"] { color: var(--ink); }
.nav-cta { display: none; }
.nav-toggle { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 10px; background: var(--glass-2); }
.nav-toggle svg { width: 20px; height: 20px; }
.mobile-menu { display: none; flex-direction: column; gap: .2rem; padding: 1rem 0 .5rem; }
.mobile-menu a { padding: .7rem .25rem; font-weight: 600; border-bottom: 1px solid var(--line); color: var(--ink-soft); }
.mobile-menu.is-open { display: flex; }

@media (min-width: 780px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
}

/* =============================================================
   7. Hero / mesh
   ============================================================= */
.hero { padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 6vw, 4rem); position: relative; overflow: clip; }
.hero-mesh {
  position: absolute; inset: -10% -10% -30% -10%; z-index: -1;
  background:
    radial-gradient(at 15% 20%, rgba(255,214,165,0.55) 0%, transparent 55%),
    radial-gradient(at 85% 15%, rgba(189,178,255,0.5) 0%, transparent 55%),
    radial-gradient(at 50% 90%, rgba(255,173,173,0.45) 0%, transparent 55%);
  filter: blur(60px) saturate(150%);
  animation: meshDrift 34s ease-in-out infinite;
}
@keyframes meshDrift {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.15) rotate(8deg); }
}
@media (prefers-reduced-motion: reduce) { .hero-mesh { animation: none; } }
.hero-inner { max-width: 760px; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero .lede { margin-top: 1.1rem; max-width: 56ch; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: .85rem; margin-top: 1.75rem; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin-top: clamp(2.5rem, 5vw, 3.5rem); max-width: 640px; }
.hero-stat { text-align: left; }
.hero-stat b { display: block; font-family: "Sora", sans-serif; font-size: clamp(1.4rem, 3vw, 2rem); }
.hero-stat span { font-size: .82rem; color: var(--ink-mute); }

/* =============================================================
   8. Calculator cards grid (home)
   ============================================================= */
.calc-grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
.calc-card {
  display: flex; flex-direction: column; gap: .9rem;
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out);
}
.calc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-3); }
.calc-icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.calc-icon svg { width: 26px; height: 26px; }
.calc-card h3 { margin: 0; }
.calc-card p { color: var(--ink-soft); font-size: .96rem; flex: 1; }
.calc-card .btn { align-self: flex-start; }
@media (min-width: 640px) { .calc-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .calc-grid { grid-template-columns: repeat(4, 1fr); } }

/* =============================================================
   9. Calculator tool (interactive)
   ============================================================= */
.calc-tool { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
.calc-form { display: grid; gap: 1.1rem; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .4rem; }
.field input, .field select {
  width: 100%; padding: .8rem 1rem; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: rgba(255,255,255,0.8); font-size: 1rem; color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus-visible, .field select:focus-visible { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255,122,89,0.18); outline: none; }
.field-row { display: grid; gap: 1.1rem; grid-template-columns: 1fr; }
@media (min-width: 560px) { .field-row { grid-template-columns: 1fr 1fr; } }
.calc-results { display: grid; gap: .9rem; align-content: start; }
.result-row { display: flex; align-items: baseline; justify-content: space-between; padding: .85rem 1rem; border-radius: var(--radius-sm); background: rgba(255,255,255,0.55); border: 1px solid var(--line); }
.result-row.hi { background: linear-gradient(135deg, rgba(255,122,89,0.14), rgba(99,102,241,0.14)); border-color: transparent; }
.result-row span:first-child { font-size: .9rem; color: var(--ink-soft); font-weight: 600; }
.result-row .val { font-family: "Sora", sans-serif; font-weight: 800; font-size: 1.25rem; }
.result-note { font-size: .85rem; color: var(--ink-mute); }
@media (min-width: 900px) { .calc-tool { grid-template-columns: 1.1fr 1fr; } }

/* =============================================================
   10. FAQ accordion (native <details>/<summary> — works with JS off)
   ============================================================= */
.faq-item { border-bottom: 1px solid var(--line); padding-block: 1.1rem; }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; cursor: pointer; font-weight: 700; font-size: 1.02rem; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--glass-2); display: grid; place-items: center; transition: transform .3s var(--ease-out); font-size: 1rem; }
.faq-item[open] summary .plus { transform: rotate(45deg); }
.faq-item p { color: var(--ink-soft); margin-top: .7rem; max-width: 68ch; }

/* =============================================================
   11. Blog cards / list
   ============================================================= */
.blog-grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .blog-grid { grid-template-columns: repeat(3, 1fr); } }
.blog-card { display: flex; flex-direction: column; gap: .6rem; height: 100%; }
.blog-card .badge { align-self: flex-start; }
.blog-card h3 { margin: 0; }
.blog-card p { color: var(--ink-soft); font-size: .94rem; flex: 1; }
.blog-card .read-more { font-weight: 700; color: var(--accent-2); font-size: .9rem; }
.post-meta { display: flex; gap: .75rem; align-items: center; color: var(--ink-mute); font-size: .85rem; margin-bottom: 1.5rem; }
.post-meta .badge { margin-right: .25rem; }

/* =============================================================
   12. Footer
   ============================================================= */
.site-footer { border-top: 1px solid var(--line); padding-block: 3rem 2rem; margin-top: 3rem; }
.footer-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.footer-col h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-mute); margin-bottom: .8rem; }
.footer-col ul { list-style: none; padding: 0; display: grid; gap: .55rem; }
.footer-col a { color: var(--ink-soft); font-size: .93rem; }
.footer-col a:hover { color: var(--ink); }
.footer-bottom { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: space-between; align-items: center; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .85rem; color: var(--ink-mute); }
@media (min-width: 780px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }

/* =============================================================
   13. CTA band
   ============================================================= */
.cta-band { text-align: center; padding: clamp(2.5rem, 6vw, 4rem); position: relative; overflow: clip; }
.cta-band h2 { margin-bottom: .75rem; }
.cta-band p { color: var(--ink-soft); max-width: 52ch; margin-inline: auto; margin-bottom: 1.75rem; }

/* =============================================================
   14. Reveal on scroll
   ============================================================= */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease-soft), transform .7s var(--ease-soft); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { transition-duration: .01s; } }

/* =============================================================
   15. Responsive helpers
   ============================================================= */
@media (min-width: 540px) { }
@media (min-width: 720px) { }
@media (min-width: 960px) { }
@media (min-width: 1280px) { }