/* ===== CSS Variables & Theme ===== */
:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --card-bg: #ffffff;
  --card-border: #e5e7eb;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.08);
  --header-bg: rgba(255,255,255,0.85);
  --tag-bg: #eef2ff;
  --tag-text: #4338ca;
  --input-bg: #f3f4f6;
  --input-border: #d1d5db;
  --footer-bg: #1a1a2e;
  --footer-text: #d1d5db;
  --radius: 12px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --text: #e5e7eb;
  --text-secondary: #9ca3af;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --card-bg: #1e1e32;
  --card-border: #2d2d44;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
  --header-bg: rgba(15,15,26,0.85);
  --tag-bg: #2d2d54;
  --tag-text: #a5b4fc;
  --input-bg: #1a1a2e;
  --input-border: #374151;
  --footer-bg: #0a0a14;
  --footer-text: #9ca3af;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--accent); }

.theme-toggle {
  font-size: 1.2rem;
  padding: 0.4rem;
  border-radius: 8px;
  transition: background var(--transition);
}

.theme-toggle:hover { background: var(--input-bg); }

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  color: var(--text);
}

/* ===== Hero ===== */
.hero {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 1.5rem 2rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.search-box {
  max-width: 600px;
  margin: 0 auto;
}

.search-box input {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  border: 2px solid var(--input-border);
  border-radius: var(--radius);
  background: var(--input-bg);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* ===== Categories ===== */
.categories {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 1rem;
}

.category-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar { display: none; }

.category-tab {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 100px;
  white-space: nowrap;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  transition: all var(--transition);
}

.category-tab:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.category-tab.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ===== Tools Grid ===== */
.tools-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.tool-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.tool-icon {
  font-size: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tag-bg);
  border-radius: 12px;
  flex-shrink: 0;
}

.tool-card-header h3 {
  font-size: 1rem;
  font-weight: 700;
}

.tool-card-header .tool-pricing {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.tool-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  flex-grow: 1;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-bottom: 0.75rem;
}

.tool-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 100px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: opacity var(--transition);
}

.tool-link:hover { opacity: 0.8; }

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

/* ===== Newsletter ===== */
.newsletter {
  max-width: 600px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  text-align: center;
}

.newsletter h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.newsletter p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

.newsletter-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 2px solid var(--input-border);
  border-radius: var(--radius);
  background: var(--input-bg);
  color: var(--text);
  font-size: 0.9rem;
}

.newsletter-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.newsletter-form button {
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: background var(--transition);
}

.newsletter-form button:hover { background: var(--accent-hover); }

/* ===== Blog Preview ===== */
.blog-preview {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.blog-preview h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.blog-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.blog-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: transform var(--transition);
}

.blog-card:hover { transform: translateY(-2px); }

.blog-card-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.blog-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.blog-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.view-all-link {
  display: inline-block;
  margin-top: 1.5rem;
  font-weight: 600;
  color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 1.5rem 1.5rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
}

.footer-section h3 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.footer-section p {
  font-size: 0.85rem;
  line-height: 1.6;
}

.footer-section a {
  display: block;
  font-size: 0.85rem;
  padding: 0.25rem 0;
  transition: color var(--transition);
}

.footer-section a:hover { color: #fff; }

.footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid #2d2d44;
  text-align: center;
  font-size: 0.8rem;
}

/* ===== Pages: About, Contact, Blog, Privacy ===== */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.page-content h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.page-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.page-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.page-content ul {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-content li { margin-bottom: 0.375rem; }

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-form label {
  font-weight: 600;
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--input-border);
  border-radius: var(--radius);
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form textarea { min-height: 150px; resize: vertical; }

.contact-form button {
  align-self: flex-start;
  padding: 0.75rem 2rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background var(--transition);
}

.contact-form button:hover { background: var(--accent-hover); }

/* Blog List */
.blog-list { margin-top: 1.5rem; }

.blog-list-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--card-border);
}

.blog-list-item:first-child { padding-top: 0; }

.blog-list-item h2 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 0.375rem;
}

.blog-list-item h2 a:hover { color: var(--accent); }

.blog-list-item .date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.blog-list-item p { margin-bottom: 0; }

/* Blog Article */
.article-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.page-content article h2 { margin-top: 2.5rem; }

.page-content article p {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.8;
}

/* Disqus */
#disqus_thread { margin-top: 3rem; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--card-border);
    gap: 0.75rem;
  }
  .mobile-menu-btn { display: block; }
  .hero { padding: 2.5rem 1.5rem 1.5rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: 1.5rem; }
  .newsletter-form { flex-direction: column; }
  .blog-cards { grid-template-columns: 1fr; }
}