/*
Theme Name: litbuy signal
Theme URI: https://sheetfinds.com/
Author: litbuy signal Team
Description: A modern, grid-signal SEO WordPress theme for the litbuy Signal spreadsheet shopping guide. Electric indigo + mint green + mist white palette.
Version: 1.0.0
Requires at least: 5.8
Requires PHP: 7.4
License: GPLv2 or later
Text Domain: litbuy-signal
*/

:root {
  --color-bg: #f3f6fb;
  --color-surface: #ffffff;
  --color-accent: #4338ca;
  --color-accent-dark: #312b94;
  --color-accent-2: #10b981;
  --color-text: #0f1522;
  --color-text-muted: #5a6378;
  --color-border: #dce3ef;
  --ff-serif: 'Instrument Serif', Georgia, serif;
  --ff-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 6px rgba(15,21,34,0.06);
  --shadow-md: 0 10px 30px rgba(67,56,202,0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-dark); }
h1, h2, h3, h4 { color: var(--color-text); line-height: 1.25; margin: 0 0 16px; }
h1 { font-family: var(--ff-serif); font-style: italic; font-weight: 400; font-size: clamp(36px, 5vw, 58px); }
h2 { font-family: var(--ff-serif); font-style: italic; font-weight: 400; font-size: clamp(26px, 3vw, 36px); }
h3 { font-family: var(--ff-sans); font-weight: 700; font-size: 20px; }
p { margin: 0 0 16px; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* Announcement */
.announce {
  background: var(--color-accent);
  color: #ffffff;
  text-align: center;
  padding: 10px 20px;
  font-size: 14px;
  font-family: var(--ff-sans);
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  padding: 16px 20px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--ff-serif);
  font-style: italic;
  font-size: 28px;
  color: var(--color-accent);
  text-decoration: none;
  flex-shrink: 0;
  line-height: 1.1;
}
.brand .tag {
  font-family: var(--ff-sans);
  font-style: normal;
  font-size: 11px;
  color: var(--color-accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}
.nav-primary { display: flex; align-items: center; gap: 24px; flex: 1; justify-content: flex-end; }
.nav-list { list-style: none; margin: 0; padding: 0; display: flex; gap: 20px; align-items: center; }
.nav-item { position: relative; }
.nav-item > a,
.nav-item > details > summary {
  color: var(--color-text);
  font-family: var(--ff-sans);
  font-weight: 500;
  font-size: 15px;
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  user-select: none;
  transition: color 0.15s, border-color 0.15s;
}
.nav-item > details > summary::-webkit-details-marker { display: none; }
.nav-item > details > summary::marker { content: ""; }
.nav-item > a:hover,
.nav-item > details > summary:hover,
.nav-item > details[open] > summary {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.nav-item .arrow { font-size: 10px; transition: transform 0.2s; line-height: 1; }
.nav-item > details[open] > summary .arrow { transform: rotate(180deg); }
.nav-details { position: static; }
.nav-sub {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  min-width: 280px;
  padding: 10px;
  list-style: none;
  margin: 0;
  z-index: 60;
  max-height: 420px;
  overflow-y: auto;
}
.nav-sub li { list-style: none; margin: 0; }
.nav-sub a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
  font-family: var(--ff-sans);
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav-sub a:hover { background: rgba(67,56,202,0.08); color: var(--color-accent); }
.cta-group { display: inline-flex; gap: 10px; align-items: center; flex-shrink: 0; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  font-family: var(--ff-sans);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn-primary { background: var(--color-accent-2); color: #ffffff; border-color: var(--color-accent-2); }
.btn-primary:hover { background: #0e9f73; transform: translateY(-1px); color: #ffffff; }
.btn-secondary { background: transparent; color: var(--color-accent); border-color: var(--color-accent); }
.btn-secondary:hover { background: var(--color-accent); color: #ffffff; }
.menu-toggle { position: absolute; opacity: 0; pointer-events: none; }
.menu-toggle-label {
  display: none;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 10px 14px;
  background: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-family: var(--ff-sans);
  font-weight: 600;
  font-size: 14px;
}
.menu-toggle-label .hamburger-icon { font-size: 18px; line-height: 1; }

@media (max-width: 960px) {
  .masthead { flex-wrap: wrap; gap: 16px; }
  .menu-toggle-label { display: inline-flex; }
  .nav-primary {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--color-border);
    margin-top: 4px;
  }
  .menu-toggle:checked ~ .nav-primary { display: flex; }
  .nav-list { flex-direction: column; width: 100%; gap: 2px; align-items: stretch; }
  .nav-item { width: 100%; }
  .nav-item > a,
  .nav-item > details > summary {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    justify-content: space-between;
    background: var(--color-surface);
  }
  .nav-sub {
    position: static;
    transform: none;
    box-shadow: none;
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    margin: -2px 8px 6px;
    min-width: 0;
  }
  .cta-group { width: 100%; flex-wrap: wrap; }
  .cta-group .btn { flex: 1 1 48%; justify-content: center; }
}

/* Hero */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -2;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(67,56,202,0.80) 0%, rgba(67,56,202,0.42) 55%, rgba(16,185,129,0.25) 100%);
  z-index: -1;
}
.hero-content { position: relative; max-width: 760px; padding: 90px 24px; z-index: 1; color: #ffffff; }
.hero .eyebrow {
  font-family: var(--ff-serif);
  font-style: italic;
  color: var(--color-accent-2);
  font-size: 20px;
  margin-bottom: 14px;
}
.hero h1 { color: #ffffff; margin-bottom: 20px; }
.hero .lede { font-size: 18px; max-width: 620px; color: rgba(255,255,255,0.95); margin-bottom: 28px; }

/* Sections */
section.section { padding: 72px 0; }
.section-title {
  font-family: var(--ff-serif);
  font-style: italic;
  font-size: clamp(28px, 3.4vw, 42px);
  text-align: center;
  margin-bottom: 12px;
}
.section-sub { text-align: center; color: var(--color-text-muted); margin-bottom: 36px; max-width: 640px; margin-left: auto; margin-right: auto; }

/* Categories */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 960px) { .cat-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .cat-grid { grid-template-columns: repeat(2, 1fr); } }
.cat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 2px solid var(--color-accent-2);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(67,56,202,0.18); }
.cat-card .emoji {
  font-size: 44px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(67,56,202,0.12), 0 0 20px rgba(67,56,202,0.25);
}
.cat-card .name {
  font-family: var(--ff-sans);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 14px;
}
.cat-card .link { color: var(--color-accent-2); font-size: 13px; font-weight: 600; }

/* Article (pulse) cards */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 900px) { .article-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .article-grid { grid-template-columns: 1fr; } }
.pulse-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 22px 22px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pulse-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.pulse-card .badge {
  position: absolute;
  top: -14px;
  left: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #ffffff;
  font-family: var(--ff-sans);
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 14px rgba(67,56,202,0.35);
}
.pulse-card .sub {
  font-family: var(--ff-serif);
  font-style: italic;
  color: var(--color-accent-2);
  font-size: 15px;
  margin-top: 8px;
}
.pulse-card h3 { margin: 0; font-size: 19px; }
.pulse-card .excerpt { color: var(--color-text-muted); font-size: 14.5px; }
.pulse-card .read {
  margin-top: auto;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 14px;
}

/* Homepage article */
.home-article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 920px;
  margin: 0 auto;
}
.home-article h2 { margin-top: 32px; }
.home-article p, .home-article ul { color: var(--color-text); }
.home-article ul { padding-left: 20px; }
.home-article blockquote {
  border-left: 4px solid var(--color-accent-2);
  padding: 8px 20px;
  color: var(--color-text-muted);
  font-family: var(--ff-serif);
  font-style: italic;
  margin: 24px 0;
}
@media (max-width: 640px) { .home-article { padding: 28px 20px; } }

/* CTA strip */
.cta-strip {
  background: var(--color-accent);
  color: #ffffff;
  padding: 72px 20px;
  text-align: center;
}
.cta-strip .eyebrow { font-family: var(--ff-serif); font-style: italic; color: var(--color-accent-2); font-size: 18px; margin-bottom: 10px; }
.cta-strip h2 { color: #ffffff; margin-bottom: 22px; }
.cta-strip .cta-group { justify-content: center; }

/* Footer */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.88);
  padding: 60px 20px 24px;
}
.site-footer a { color: rgba(255,255,255,0.78); }
.site-footer a:hover { color: var(--color-accent-2); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 40px; max-width: 1180px; margin: 0 auto 32px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: #ffffff; font-size: 15px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.footer-bottom { text-align: center; font-size: 13px; color: rgba(255,255,255,0.6); border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; }

/* Guide page */
.guide-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; max-width: 1180px; margin: 0 auto; padding: 48px 20px; }
@media (max-width: 900px) { .guide-wrap { grid-template-columns: 1fr; } }
.guide-content { background: var(--color-surface); padding: 40px; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.guide-content h1 { margin-bottom: 24px; }
.breadcrumb { font-size: 13px; color: var(--color-text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--color-text-muted); }
.eyebrow-tag { font-family: var(--ff-serif); font-style: italic; color: var(--color-accent-2); margin-bottom: 10px; }
.guide-rule { border: none; height: 2px; width: 60px; background: var(--color-accent-2); margin: 20px 0 32px; }
.sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-box { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 22px; }
.sidebar-box h4 { font-family: var(--ff-sans); font-size: 13px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent); margin-bottom: 14px; }
.sidebar-box ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.sidebar-box a { color: var(--color-text); }
.sidebar-box a:hover { color: var(--color-accent); }
.cta-box { background: var(--color-accent); color: #ffffff; }
.cta-box h4 { color: #ffffff; }
.cta-box .btn-primary { background: var(--color-accent-2); color: #ffffff; }
.cta-box .btn-secondary { color: #ffffff; border-color: #ffffff; }
.related-guides { max-width: 1180px; margin: 0 auto; padding: 48px 20px; }

/* Accessibility */
:focus-visible { outline: 3px solid var(--color-accent-2); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a0f1d;
    --color-surface: #141c30;
    --color-accent: #7a74e6;
    --color-accent-dark: #4e46c9;
    --color-accent-2: #4ad6a3;
    --color-text: #e4e8f2;
    --color-text-muted: #94a0b8;
    --color-border: #263152;
  }
  .btn-primary { color: #0a0f1d; }
  .site-header { background: #141c30; }
  .cta-strip, .cta-box { background: #4338ca; }
}