/*
Theme Name: PDF Tools Pro
Theme URI: https://example.com/pdftools-pro
Author: PDF Tools Pro
Author URI: https://example.com
Description: Dark UI WordPress theme for PDF tools website. Advanced search, customizable cards, theme settings for all text, tools manager, 100% Lighthouse optimized, SEO-ready, fully responsive.
Version: 1.0.0
Requires at least: 5.9
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: pdftools-pro
*/

/* ========== CSS Variables (overridable by Customizer) ========== */
:root {
  --pdftheme-bg: #191C22;
  --pdftheme-bg-card: #23272F;
  --pdftheme-bg-input: #2a2e38;
  --pdftheme-text: #ffffff;
  --pdftheme-text-muted: #b0b5bd;
  --pdftheme-accent: #FF6B6B;
  --pdftheme-accent-hover: #ff5252;
  --pdftheme-border: rgba(255,255,255,0.08);
  --pdftheme-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, sans-serif;
  --pdftheme-radius: 12px;
  --pdftheme-container: 1200px;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  background: #191C22;
}
html,
body.pdftheme-dark {
  margin: 0;
  font-family: var(--pdftheme-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--pdftheme-text, #ffffff);
  background: var(--pdftheme-bg, #191C22) !important;
  -webkit-font-smoothing: antialiased;
}
body.pdftheme-dark .site-container,
body.pdftheme-dark .site-header,
body.pdftheme-dark .hero,
body.pdftheme-dark .tools-section {
  background: var(--pdftheme-bg, #191C22);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--pdftheme-accent); text-decoration: none; }
a:hover { color: var(--pdftheme-accent-hover); }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* ========== Layout ========== */
.site-container { min-height: 100vh; display: flex; flex-direction: column; }
.site-main { flex: 1; }
.container { width: 100%; max-width: var(--pdftheme-container); margin-left: auto; margin-right: auto; padding-left: 20px; padding-right: 20px; }

/* ========== Header ========== */
.site-header {
  background: var(--pdftheme-bg, #191C22);
  border-bottom: 1px solid var(--pdftheme-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.site-branding a { display: inline-flex; align-items: center; color: var(--pdftheme-text, #ffffff); font-weight: 700; font-size: 1.5rem; }
.site-branding .accent { color: var(--pdftheme-accent, #FF6B6B); }
.main-nav { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.main-nav ul { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; list-style: none; margin: 0; padding: 0; }
.main-nav ul li { margin: 0; }
.main-nav a { color: var(--pdftheme-text); font-weight: 500; }
.main-nav a:hover { color: var(--pdftheme-accent); }
.btn-cta {
  display: inline-block;
  background: var(--pdftheme-accent);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-cta:hover { background: var(--pdftheme-accent-hover); color: #fff !important; }

/* ========== Hero ========== */
.hero {
  padding: 60px 0 80px;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 107, 107, 0.2);
  color: var(--pdftheme-accent, #FF6B6B);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 20px;
  color: var(--pdftheme-text, #ffffff);
}
.hero h1 .accent { color: var(--pdftheme-accent, #FF6B6B); }
.hero-desc {
  color: var(--pdftheme-text-muted, #b0b5bd);
  max-width: 640px;
  margin: 0 auto 32px;
  font-size: 1.1rem;
}

/* ========== Search ========== */
.hero-search-wrap { max-width: 560px; margin: 0 auto; position: relative; }
.hero-search {
  width: 100%;
  padding: 16px 20px 16px 48px;
  background: var(--pdftheme-bg-input, #2a2e38);
  border: 1px solid var(--pdftheme-border);
  border-radius: var(--pdftheme-radius);
  color: var(--pdftheme-text, #ffffff);
  font-size: 1rem;
  transition: border-color 0.2s;
}
.hero-search::placeholder { color: var(--pdftheme-text-muted, #b0b5bd); }
.hero-search:focus { outline: none; border-color: var(--pdftheme-accent); }
.hero-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--pdftheme-text-muted);
  pointer-events: none;
}
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 8px;
  background: var(--pdftheme-bg-card);
  border: 1px solid var(--pdftheme-border);
  border-radius: var(--pdftheme-radius);
  max-height: 320px;
  overflow-y: auto;
  z-index: 50;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.search-results:empty { display: none; }
.search-results a {
  display: block;
  padding: 14px 20px;
  color: var(--pdftheme-text);
  border-bottom: 1px solid var(--pdftheme-border);
}
.search-results a:last-child { border-bottom: none; }
.search-results a:hover { background: rgba(255,255,255,0.05); color: var(--pdftheme-accent); }

/* ========== Section Title ========== */
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin: 0 0 32px;
  color: var(--pdftheme-text, #ffffff);
}

/* ========== Tools Grid (Cards) ========== */
.tools-section { padding: 48px 0 80px; }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.tool-card {
  background: var(--pdftheme-bg-card, #23272F);
  border: 1px solid var(--pdftheme-border);
  border-radius: var(--pdftheme-radius);
  padding: 28px 24px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.25);
}
.tool-card > a { color: inherit; display: flex; flex-direction: column; align-items: center; flex: 1; width: 100%; }
.tool-card .tool-star {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--pdftheme-accent);
  width: 20px;
  height: 20px;
}
.tool-card .tool-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
  color: var(--pdftheme-accent);
}
.tool-card .tool-icon img { width: 56px; height: 56px; object-fit: contain; }
.tool-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--pdftheme-text, #ffffff);
}
.tool-card .tool-desc {
  color: var(--pdftheme-text-muted, #b0b5bd);
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

/* ========== Footer ========== */
.site-footer {
  background: #1B212D;
  padding: 48px 0 24px;
  margin-top: auto;
  border-top: 1px solid var(--pdftheme-border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer-brand .logo-text { font-weight: 700; font-size: 1.25rem; color: var(--pdftheme-text); }
.footer-brand .logo-text .accent { color: var(--pdftheme-accent); }
.footer-brand .tagline {
  color: var(--pdftheme-text-muted);
  font-size: 0.95rem;
  margin: 12px 0;
  line-height: 1.6;
}
.footer-contact {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--pdftheme-text-muted);
  font-size: 0.95rem;
  margin-top: 12px;
}
.footer-contact a { color: var(--pdftheme-text-muted); }
.footer-contact a:hover { color: var(--pdftheme-accent); }
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--pdftheme-text);
  margin: 0 0 16px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--pdftheme-text-muted); }
.footer-col a:hover { color: var(--pdftheme-accent); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--pdftheme-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copyright { color: var(--pdftheme-text-muted); font-size: 0.9rem; margin: 0; }
.footer-social { display: flex; gap: 16px; }
.footer-social a {
  color: var(--pdftheme-text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: color 0.2s, background 0.2s;
}
.footer-social a:hover { color: var(--pdftheme-accent); background: rgba(255,255,255,0.05); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .header-inner { flex-direction: column; align-items: stretch; }
  .main-nav { justify-content: center; }
  .hero { padding: 40px 0 56px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .footer-brand .tagline { text-align: center; }
  .footer-contact { justify-content: center; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .tools-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .main-nav { flex-direction: column; }
  .container { padding-left: 16px; padding-right: 16px; }
}

/* ========== Utility ========== */
.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;
}
.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background: var(--pdftheme-accent);
  color: #fff;
  z-index: 1000;
}