/*
Theme Name: LitBuy Spreadsheet
Theme URI: https://sheetfinds.com/
Author: LitBuy Spreadsheet Team
Author URI: https://sheetfinds.com/
Description: A modern, SEO-optimized WordPress theme built around the litbuy Spreadsheet shopping guide. Features a bright, airy design with 11 product categories, built-in Guide article pages, and clear CTA buttons that drive visitors to the main sheetfinds.com store.
Version: 1.0.0
Requires at least: 5.8
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: litbuy-spreadsheet
Tags: blog, e-commerce, custom-menu, custom-logo, featured-images, full-width-template, responsive-layout, seo-friendly, three-columns, two-columns
*/

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Colors - Light mode (soft, bright, lifestyle shopping vibe) */
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-surface-raised: #f4f1ed;
  --color-accent: #e63946;
  --color-accent-dark: #c1121f;
  --color-accent-soft: #ffe3e6;
  --color-text: #1a1a18;
  --color-text-muted: #6b6b67;
  --color-text-faint: #a1a09b;
  --color-border: #e8e5e0;
  --color-border-strong: #d6d2cc;
  --color-success: #2d6a4f;
  --color-info: #1d4ed8;
  --color-warm: #f4a261;
  --color-cool: #a8dadc;

  /* Spacing - 8px rhythm */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 26, 24, 0.05);
  --shadow-md: 0 4px 12px rgba(26, 26, 24, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 26, 24, 0.12);

  /* Transitions */
  --transition: 0.15s ease;
  --transition-slow: 0.3s ease;

  /* Layout */
  --container: 1180px;
  --container-narrow: 820px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #141412;
    --color-surface: #1e1e1c;
    --color-surface-raised: #2a2a27;
    --color-accent: #ff6b76;
    --color-accent-dark: #e63946;
    --color-accent-soft: #3a1f22;
    --color-text: #f0ede8;
    --color-text-muted: #a1a09b;
    --color-text-faint: #6b6b67;
    --color-border: #3a3935;
    --color-border-strong: #4d4c47;
    --color-success: #74c69d;
    --color-info: #93c5fd;
  }
}

:root[data-theme="dark"] {
  --color-bg: #141412;
  --color-surface: #1e1e1c;
  --color-surface-raised: #2a2a27;
  --color-accent: #ff6b76;
  --color-accent-dark: #e63946;
  --color-accent-soft: #3a1f22;
  --color-text: #f0ede8;
  --color-text-muted: #a1a09b;
  --color-text-faint: #6b6b67;
  --color-border: #3a3935;
  --color-border-strong: #4d4c47;
}

/* ============================================================
   RESET + BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { max-width: 100%; height: auto; display: block; }

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-accent); text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: 48px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
h4 { font-size: 20px; }
h5 { font-size: 18px; }
h6 { font-size: 16px; }

p { margin: 0 0 var(--space-4); }

ul, ol { padding-left: var(--space-5); margin: 0 0 var(--space-4); }
li { margin-bottom: var(--space-2); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--color-surface-raised);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--space-5); }

.section { padding: var(--space-8) 0; }
.section-sm { padding: var(--space-7) 0; }
.section-lg { padding: var(--space-9) 0; }

.screen-reader-text {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0);
}

/* ============================================================
   ANNOUNCEMENT BAR
   ============================================================ */
.announcement-bar {
  background: linear-gradient(90deg, var(--color-accent-dark), var(--color-accent));
  color: #fff;
  text-align: center;
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.announcement-bar a { color: #fff; text-decoration: underline; }

/* ============================================================
   HEADER + NAVIGATION
   ============================================================ */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) 0;
}

.site-branding { display: flex; align-items: center; gap: var(--space-3); }
.site-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.site-logo:hover { color: var(--color-accent); text-decoration: none; }
.site-logo .logo-accent { color: var(--color-accent); }

.main-nav { display: flex; align-items: center; gap: var(--space-5); }

.nav-list {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-list > li { position: relative; margin: 0; }
.nav-list > li > a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--space-2) var(--space-1);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
}
.nav-list > li > a:hover { color: var(--color-accent); text-decoration: none; }

.dropdown-toggle::after {
  content: "▾";
  font-size: 10px;
  margin-left: 2px;
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  list-style: none;
  margin: var(--space-2) 0 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition);
  z-index: 60;
}
.nav-list > li:hover > .dropdown,
.nav-list > li:focus-within > .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li { margin: 0; }
.dropdown a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
}
.dropdown a:hover { background: var(--color-surface-raised); color: var(--color-accent); text-decoration: none; }

.dropdown-wide { min-width: 320px; }
.dropdown-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 20px;
  color: var(--color-text);
}

#mobile-menu-toggle { display: none; }

.header-ctas { display: flex; gap: var(--space-2); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  line-height: 1;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: #fff; }

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-secondary:hover { background: var(--color-accent); color: #fff; }

.btn-ghost {
  background: var(--color-surface-raised);
  color: var(--color-text);
  border-color: transparent;
}
.btn-ghost:hover { background: var(--color-border); color: var(--color-text); }

.btn-sm { padding: var(--space-2) var(--space-4); font-size: 14px; }
.btn-lg { padding: var(--space-4) var(--space-6); font-size: 17px; }

.btn-group { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding: var(--space-9) 0;
  background:
    linear-gradient(135deg, rgba(255,227,230,0.85) 0%, rgba(168,218,220,0.65) 50%, rgba(244,162,97,0.55) 100%),
    url("https://images.unsplash.com/photo-1607082348824-0a96f2a4b9da?w=1600&q=80") center/cover;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(255,255,255,0.3), transparent 60%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: 760px;
  text-align: center;
  margin: 0 auto;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  margin-bottom: var(--space-4);
  color: var(--color-text);
  text-shadow: 0 2px 20px rgba(255,255,255,0.4);
}
.hero p.hero-subtitle {
  font-size: 18px;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(4px);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  display: inline-block;
}
.hero .btn-group { justify-content: center; }

/* ============================================================
   CATEGORY CARDS
   ============================================================ */
.section-heading {
  text-align: center;
  margin-bottom: var(--space-7);
}
.section-heading h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  margin-bottom: var(--space-2);
}
.section-heading p {
  color: var(--color-text-muted);
  font-size: 17px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition);
  min-height: 170px;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
  color: var(--color-text);
  text-decoration: none;
}
.category-card .category-icon {
  font-size: 48px;
  margin-bottom: var(--space-3);
  line-height: 1;
}
.category-card .category-name {
  font-weight: 600;
  font-size: 16px;
}
.category-card .category-cta {
  color: var(--color-accent);
  font-size: 13px;
  margin-top: var(--space-2);
  font-weight: 500;
}

/* Alternating category card tints */
.category-card:nth-child(3n+1) { background: linear-gradient(135deg, #fff, #fff5f5); }
.category-card:nth-child(3n+2) { background: linear-gradient(135deg, #fff, #f0f9ff); }
.category-card:nth-child(3n+3) { background: linear-gradient(135deg, #fff, #fff8e7); }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .category-card:nth-child(3n+1) { background: linear-gradient(135deg, var(--color-surface), #2a1f20); }
  :root:not([data-theme="light"]) .category-card:nth-child(3n+2) { background: linear-gradient(135deg, var(--color-surface), #1a252e); }
  :root:not([data-theme="light"]) .category-card:nth-child(3n+3) { background: linear-gradient(135deg, var(--color-surface), #2a2419); }
}

/* ============================================================
   ARTICLE / GUIDE CARDS
   ============================================================ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  text-decoration: none;
  color: var(--color-text);
}
.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  text-decoration: none;
}
.article-card h3 {
  font-size: 16px;
  margin-bottom: var(--space-2);
  line-height: 1.35;
}
.article-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-3);
}
.article-card .article-cta {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 14px;
}

/* ============================================================
   HOMEPAGE SEO ARTICLE
   ============================================================ */
.home-article {
  max-width: var(--container-narrow);
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}
.home-article h2 { font-size: 32px; }
.home-article h3 {
  font-size: 22px;
  margin-top: var(--space-6);
  color: var(--color-accent-dark);
}
.home-article p { font-size: 16px; line-height: 1.75; color: var(--color-text); }
.home-article ul li { margin-bottom: var(--space-2); }

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  padding: var(--space-8) var(--space-5);
  border-radius: var(--radius-lg);
  text-align: center;
  margin: var(--space-7) auto;
  max-width: var(--container-narrow);
}
.cta-banner h2 { color: #fff; margin-bottom: var(--space-3); }
.cta-banner p { color: rgba(255,255,255,0.9); margin-bottom: var(--space-5); font-size: 18px; }
.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-accent-dark);
  border-color: #fff;
}
.cta-banner .btn-primary:hover { background: #fff5f5; color: var(--color-accent-dark); }
.cta-banner .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: #fff;
}
.cta-banner .btn-secondary:hover { background: #fff; color: var(--color-accent-dark); }

/* ============================================================
   SINGLE / GUIDE PAGE
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-surface-raised));
  padding: var(--space-8) 0 var(--space-7);
  text-align: center;
}
.page-hero h1 { font-size: clamp(28px, 4.5vw, 44px); margin-bottom: var(--space-3); }
.breadcrumb {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { margin: 0 var(--space-2); color: var(--color-text-faint); }

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--space-7);
  padding: var(--space-7) 0;
}

.article-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}
.article-content h2 {
  font-size: 26px;
  margin-top: var(--space-6);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}
.article-content h2:first-child { margin-top: 0; }
.article-content h3 {
  font-size: 20px;
  margin-top: var(--space-5);
  color: var(--color-accent-dark);
}
.article-content p { font-size: 16px; line-height: 1.8; }
.article-content a { color: var(--color-accent-dark); text-decoration: underline; }
.article-content a:hover { color: var(--color-accent); }
.article-content ul, .article-content ol { margin-bottom: var(--space-5); }
.article-content ul li, .article-content ol li { line-height: 1.75; }

.sidebar { display: flex; flex-direction: column; gap: var(--space-5); }
.sidebar-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.sidebar-box h3 {
  font-size: 16px;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}
.sidebar-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-box li { margin-bottom: var(--space-2); }
.sidebar-box a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 14px;
}
.sidebar-box a:hover { color: var(--color-accent); text-decoration: underline; }

.sidebar-cta {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
}
.sidebar-cta h3 { color: #fff; border-color: #fff; }
.sidebar-cta .btn-primary {
  background: #fff;
  color: var(--color-accent-dark);
  border-color: #fff;
  width: 100%;
  margin-bottom: var(--space-2);
}
.sidebar-cta .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: #fff;
  width: 100%;
}

/* ============================================================
   RELATED ARTICLES
   ============================================================ */
.related-section {
  background: var(--color-surface-raised);
  padding: var(--space-7) 0;
  border-top: 1px solid var(--color-border);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-surface-raised);
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0 var(--space-5);
  margin-top: var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}
.footer-col h4 {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: var(--space-2); }
.footer-col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 14px;
}
.footer-col a:hover { color: var(--color-accent); text-decoration: underline; }
.footer-about p { color: var(--color-text-muted); font-size: 14px; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: repeat(3, 1fr); }
  .page-layout { grid-template-columns: 1fr; }
  .sidebar { grid-row: 2; }
}

@media (max-width: 768px) {
  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-5); }

  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .main-nav .nav-list { display: none; }
  .header-ctas .btn:not(.btn-primary) { display: none; }
  #mobile-menu-toggle:checked ~ .main-nav .nav-list {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-2);
    box-shadow: var(--shadow-md);
  }
  #mobile-menu-toggle:checked ~ .main-nav .nav-list > li { width: 100%; }
  #mobile-menu-toggle:checked ~ .main-nav .nav-list .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    margin: 0;
    padding-left: var(--space-4);
    min-width: 0;
    background: transparent;
  }
  .header-inner { position: relative; flex-wrap: wrap; }

  .home-article { padding: var(--space-5); }
  .article-content { padding: var(--space-5); }
  .section { padding: var(--space-7) 0; }
}

@media (max-width: 480px) {
  .category-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .btn-group { flex-direction: column; }
  .btn-group .btn { width: 100%; }
  .hero { padding: var(--space-7) 0; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .btn:hover, .category-card:hover, .article-card:hover { transform: none; }
}

/* Focus states */
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Utility */
.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }