/* ==========================================================================
   Merii — Design System
   Concept: a working ledger book / receipt tape for dropshippers.
   Paper-cool background, ink-charcoal text, ledger-green for "healthy"
   numbers, gold for neutral/attention, brick-red for "loss" numbers —
   the same colour logic a real profit/loss statement would use.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Roboto+Slab:wght@500;700;900&family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@500;600;700&display=swap');

:root {
  /* ---- Palette ---- */
  --paper:        #EEF1EC;
  --paper-raised: #F8FAF7;
  --paper-line:   #D7DED3;
  --ink:          #16231D;
  --ink-soft:     #4A584F;
  --green:        #1F7A5C;
  --green-dark:   #14523E;
  --green-tint:   #DEEEE6;
  --gold:         #C98A2C;
  --gold-tint:    #F5E7CC;
  --brick:        #B23A2E;
  --brick-tint:   #F5DEDA;

  /* ---- Type ---- */
  --font-display: 'Roboto Slab', 'Georgia', serif;
  --font-body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  /* ---- Scale ---- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --shadow-card: 0 1px 2px rgba(22, 35, 29, 0.06), 0 6px 20px rgba(22, 35, 29, 0.06);
  --shadow-lift: 0 10px 30px rgba(22, 35, 29, 0.12);
  --max-width: 1120px;
}

/* ---- Reset ---- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { padding-left: 1.25em; }
button { font: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); font-weight: 900; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ---- Layout ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 64px 0; }
.section-tight { padding: 40px 0; }
.section-alt { background: var(--paper-raised); border-top: 1px solid var(--paper-line); border-bottom: 1px solid var(--paper-line); }
.stack { display: flex; flex-direction: column; }
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green-dark);
  background: var(--green-tint);
  padding: 4px 10px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 60ch; }

/* ---- Skip link ---- */
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff;
  padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(238, 241, 236, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--paper-line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 900; font-size: 1.25rem; color: var(--ink); }
.brand-mark {
  width: 34px; height: 34px; border-radius: 7px;
  background: var(--green);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 0.95rem;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,0.15);
}
.brand small { display: block; font-family: var(--font-body); font-weight: 500; font-size: 0.68rem; color: var(--ink-soft); letter-spacing: 0.02em; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  font-weight: 500; font-size: 0.94rem; color: var(--ink);
}
.nav-link:hover { background: var(--paper-raised); }
.nav-dropdown {
  display: none; position: absolute; top: 100%; left: 0; margin-top: 6px;
  background: #fff; border: 1px solid var(--paper-line); border-radius: var(--radius-md);
  box-shadow: var(--shadow-lift); min-width: 260px; padding: 8px; z-index: 50;
}
.nav-item:hover .nav-dropdown, .nav-item:focus-within .nav-dropdown { display: block; }
.nav-dropdown a { display: block; padding: 9px 12px; border-radius: 6px; font-size: 0.92rem; }
.nav-dropdown a:hover { background: var(--green-tint); color: var(--green-dark); }

.nav-cta {
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.92rem;
}
.nav-cta:hover { background: var(--green-dark); }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer; padding: 8px;
  color: var(--ink);
}
.nav-toggle svg { width: 26px; height: 26px; }

@media (max-width: 880px) {
  .main-nav {
    display: none; position: fixed; inset: 72px 0 0 0; background: var(--paper);
    flex-direction: column; align-items: stretch; padding: 12px 20px 40px; overflow-y: auto;
    gap: 2px;
  }
  .main-nav.open { display: flex; }
  .nav-dropdown { display: block !important; position: static; box-shadow: none; border: none; margin: 0 0 8px 12px; padding: 0; }
  .nav-item.has-dropdown > .nav-link { font-weight: 700; }
  .nav-cta { align-self: flex-start; margin-top: 12px; }
  .nav-toggle { display: block; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: 56px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.trust-row { margin-top: 28px; display: flex; gap: 22px; flex-wrap: wrap; font-size: 0.88rem; color: var(--ink-soft); }
.trust-row span { display: inline-flex; align-items: center; gap: 6px; }
.trust-row svg { width: 16px; height: 16px; color: var(--green); flex-shrink: 0; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.96rem;
  border: 2px solid transparent; cursor: pointer; transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); }
.btn-ghost { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; }
.btn-block { width: 100%; }
.btn-sm { padding: 9px 16px; font-size: 0.86rem; }

/* ==========================================================================
   Ledger Ticket — signature card motif (used for tool cards + calculator shell)
   Dashed perforation + a clipped notch top-right, like a torn receipt.
   ========================================================================== */
.ticket {
  --notch: 16px;
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  clip-path: polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, 0 100%);
}
.ticket::before {
  content: ""; position: absolute; top: var(--notch); right: 0; width: var(--notch); height: 1px;
  background: var(--paper-line); transform: rotate(-45deg) translate(3px, -3px); transform-origin: right;
}

.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; }
@media (max-width: 940px) { .tool-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .tool-grid { grid-template-columns: 1fr; } }

.tool-card { padding: 26px 24px 24px; display: flex; flex-direction: column; gap: 12px; transition: transform 0.15s ease, box-shadow 0.15s ease; }
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.tool-card-icon {
  width: 44px; height: 44px; border-radius: 9px; background: var(--green-tint); color: var(--green-dark);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.tool-card-icon svg { width: 22px; height: 22px; }
.tool-card h3 { margin-bottom: 4px; font-size: 1.08rem; }
.tool-card p { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 0; flex-grow: 1; }
.tool-card .tool-card-link { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; color: var(--green-dark); display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; }
.tool-card-kind { position: absolute; top: 14px; right: 22px; font-family: var(--font-mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); }

/* Perforation divider (dashed line, like a tear-line on a receipt) */
.perforation { border: none; border-top: 2px dashed var(--paper-line); margin: 22px 0; }

/* ==========================================================================
   Calculator widget (shared shell used on every tool page)
   ========================================================================== */
.calc-shell { padding: 0; overflow: hidden; margin-top: 8px; }
.calc-head { background: var(--ink); color: var(--paper); padding: 18px 26px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.calc-head .dots { display: flex; gap: 6px; }
.calc-head .dots span { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,0.25); }
.calc-head h2 { color: #fff; font-size: 1.05rem; margin: 0; }
.calc-body { padding: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
@media (max-width: 720px) { .calc-body { grid-template-columns: 1fr; } }

.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.field .hint { display: block; font-size: 0.78rem; color: var(--ink-soft); margin-top: 4px; font-weight: 400; }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap .prefix, .input-wrap .suffix {
  position: absolute; font-family: var(--font-mono); font-weight: 600; color: var(--ink-soft); pointer-events: none; font-size: 0.95rem;
}
.input-wrap .prefix { left: 14px; }
.input-wrap .suffix { right: 14px; }
.field input[type="number"], .field input[type="text"], .field select {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--paper-line); border-radius: var(--radius-sm);
  background: #fff; font-family: var(--font-mono); font-size: 1rem; color: var(--ink); font-weight: 600;
}
.input-wrap.has-prefix input { padding-left: 30px; }
.input-wrap.has-suffix input { padding-right: 40px; }
.field input:focus, .field select:focus { border-color: var(--green); outline: none; box-shadow: 0 0 0 3px var(--green-tint); }

.results-panel { background: #fff; border: 1px solid var(--paper-line); border-radius: var(--radius-md); padding: 22px; }
.result-row { display: flex; align-items: baseline; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--paper-line); gap: 12px; }
.result-row:last-child { border-bottom: none; }
.result-row .label { font-size: 0.86rem; color: var(--ink-soft); }
.result-row .value { font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem; text-align: right; }
.result-row.primary { background: var(--paper); margin: 0 -22px; padding: 14px 22px; }
.result-row.primary .value { font-size: 1.55rem; }

.value.state-good  { color: var(--green-dark); }
.value.state-warn  { color: var(--gold); }
.value.state-bad   { color: var(--brick); }

.status-pill { display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 600; padding: 5px 12px; border-radius: 100px; margin-top: 14px; }
.status-pill.state-good { background: var(--green-tint); color: var(--green-dark); }
.status-pill.state-warn { background: var(--gold-tint); color: #8a5f1c; }
.status-pill.state-bad  { background: var(--brick-tint); color: var(--brick); }
.status-pill svg { width: 14px; height: 14px; }

/* ==========================================================================
   Content / article typography
   ========================================================================== */
.prose { max-width: 72ch; }
.prose h2 { margin-top: 1.6em; }
.prose h3 { margin-top: 1.3em; }
.prose ul, .prose ol { margin: 0 0 1.1em; }
.prose li { margin-bottom: 0.4em; }
.prose .formula-block {
  font-family: var(--font-mono); background: var(--ink); color: var(--paper);
  padding: 18px 20px; border-radius: var(--radius-sm); overflow-x: auto; font-size: 0.95rem; margin: 1.2em 0;
}
.prose .callout {
  border-left: 4px solid var(--green); background: var(--green-tint); padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 1.4em 0;
}
.prose .callout.gold { border-color: var(--gold); background: var(--gold-tint); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 0.94rem; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--paper-line); }
.prose th { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-soft); }
.prose td.mono { font-family: var(--font-mono); }

.breadcrumbs { font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 18px; display: flex; gap: 6px; flex-wrap: wrap; }
.breadcrumbs a:hover { text-decoration: underline; }

/* ---- FAQ (native <details>, no JS needed) ---- */
.faq-item { border-bottom: 1px solid var(--paper-line); padding: 4px 0; }
.faq-item summary {
  cursor: pointer; font-weight: 600; padding: 14px 4px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus { font-family: var(--font-mono); font-size: 1.2rem; color: var(--green); transition: transform 0.15s ease; flex-shrink: 0; }
.faq-item[open] summary .plus { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 4px 16px; color: var(--ink-soft); }

/* ---- Related tools strip ---- */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 16px; }
@media (max-width: 720px) { .related-grid { grid-template-columns: 1fr; } }
.related-card { padding: 18px; display: block; }
.related-card h4 { font-size: 0.98rem; margin-bottom: 4px; font-family: var(--font-body); font-weight: 700; }
.related-card p { font-size: 0.85rem; color: var(--ink-soft); margin: 0; }

/* ---- Generator-specific: result list / copy chips ---- */
.gen-results { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.gen-result-item {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: #fff; border: 1px solid var(--paper-line); border-radius: var(--radius-sm); padding: 12px 16px;
}
.gen-result-item .txt { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; }
.copy-btn {
  background: var(--paper); border: 1px solid var(--paper-line); border-radius: 6px; padding: 7px 12px;
  font-size: 0.78rem; font-weight: 600; cursor: pointer; color: var(--ink); white-space: nowrap;
  font-family: var(--font-mono);
}
.copy-btn:hover { background: var(--green-tint); border-color: var(--green); color: var(--green-dark); }
.copy-btn.copied { background: var(--green); border-color: var(--green); color: #fff; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--ink); color: var(--paper); padding: 56px 0 28px; margin-top: 80px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px; }
.site-footer a { color: #C9D3CC; font-size: 0.92rem; display: block; padding: 5px 0; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer .brand { color: #fff; }
.site-footer .brand small { color: #9BAAA1; }
.footer-desc { color: #9BAAA1; font-size: 0.88rem; margin-top: 12px; max-width: 32ch; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); margin-top: 44px; padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.82rem; color: #9BAAA1; }

/* ---- Misc page bits ---- */
.page-head { padding: 44px 0 8px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 780px) { .two-col { grid-template-columns: 1fr; } }
.card-plain { background: var(--paper-raised); border: 1px solid var(--paper-line); border-radius: var(--radius-md); padding: 26px; }

.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 32px; }
@media (max-width: 900px) { .blog-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .blog-grid { grid-template-columns: 1fr; } }
.blog-card { display: flex; flex-direction: column; padding: 22px; gap: 10px; }
.blog-card .tag { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; color: var(--green-dark); font-weight: 700; }
.blog-card h3 { font-size: 1.05rem; }
.blog-card p { color: var(--ink-soft); font-size: 0.9rem; }
.blog-card .read-more { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600; color: var(--ink); margin-top: auto; }

.contact-form .field { margin-bottom: 16px; }
.contact-form textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--paper-line); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.98rem; min-height: 140px; resize: vertical;
}
.contact-form textarea:focus { border-color: var(--green); outline: none; box-shadow: 0 0 0 3px var(--green-tint); }

.badge-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.badge { font-family: var(--font-mono); font-size: 0.74rem; background: var(--paper); border: 1px solid var(--paper-line); padding: 4px 10px; border-radius: 100px; color: var(--ink-soft); }