/*
Theme Name: Riddle Modern
Theme URI: https://example.com/riddle-modern
Description: Современная адаптивная версия темы Riddle. Совместима с PHP 8.5, WordPress 6.x. Hero-блок с главной новостью и 4 второстепенными.
Author: Custom
Version: 2.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: riddle-modern
Tags: blog, news, two-columns, right-sidebar, custom-menu, featured-images, threaded-comments, translation-ready, responsive-layout
*/

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
  --color-primary: #00A8A7;
  --color-primary-dark: #01908F;
  --color-primary-light: #16BEBD;
  --color-text: #2B5F83;
  --color-text-muted: #547A94;
  --color-bg: #f5f7fa;
  --color-white: #ffffff;
  --color-border: #e1e8ed;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --container: 1200px;
  --radius: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus {
  color: var(--color-primary-light);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.3;
  margin: 0 0 0.75em;
}

p {
  margin: 0 0 1em;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.5em;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.site-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.site-main {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  padding: 30px 0 50px;
}

.content-area {
  min-width: 0;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 24px;
}

.site-branding {
  flex-shrink: 0;
}

.site-title {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
}

.site-title a {
  color: var(--color-text);
}

.site-title a:hover {
  color: var(--color-primary);
}

.site-description {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Navigation */
.main-navigation {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.main-navigation ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.main-navigation li {
  position: relative;
}

.main-navigation a {
  display: block;
  padding: 10px 16px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 6px;
  transition: all var(--transition);
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: var(--color-primary);
  color: white;
  border: none;
  padding: 10px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.1rem;
}

/* ==========================================================================
   Hero Block — 1 main + 4 secondary
   ========================================================================== */
.hero-section {
  margin-bottom: 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
  min-height: 420px;
}

.hero-main {
  grid-row: 1 / 3;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #111;
}

.hero-main a {
  display: block;
  height: 100%;
  color: white;
}

.hero-main .hero-image {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-main:hover .hero-image {
  transform: scale(1.04);
}

.hero-main .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
}

.hero-main .hero-category {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  width: fit-content;
}

.hero-main .hero-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: white;
  margin: 0 0 8px;
  line-height: 1.25;
}

.hero-main .hero-meta {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
}

.hero-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
}

.hero-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #111;
  min-height: 200px;
}

.hero-card a {
  display: block;
  height: 100%;
  color: white;
}

.hero-card .hero-image {
  width: 100%;
  height: 100%;
  min-height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-card:hover .hero-image {
  transform: scale(1.05);
}

.hero-card .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
}

.hero-card .hero-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: white;
  margin: 0;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hero-card .hero-meta {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.75);
  margin-top: 6px;
}

/* Placeholder when no image */
.hero-placeholder {
  width: 100%;
  height: 100%;
  min-height: inherit;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.4);
  font-size: 2rem;
}

/* ==========================================================================
   Posts
   ========================================================================== */
.post {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
}

.post:hover {
  box-shadow: var(--shadow-hover);
}

.post .post-thumbnail {
  margin: -28px -28px 20px;
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
}

.post .post-thumbnail img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.post:hover .post-thumbnail img {
  transform: scale(1.03);
}

.post .entry-title {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.post .entry-title a {
  color: var(--color-text);
}

.post .entry-title a:hover {
  color: var(--color-primary);
}

.post-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.post-meta a {
  color: var(--color-text-muted);
}

.post-meta a:hover {
  color: var(--color-primary);
}

.entry-content {
  color: var(--color-text-muted);
}

.entry-content p:last-child {
  margin-bottom: 0;
}

.read-more {
  display: inline-block;
  margin-top: 16px;
  padding: 8px 18px;
  background: var(--color-primary);
  color: white !important;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background var(--transition);
}

.read-more:hover {
  background: var(--color-primary-dark);
}

/* Single post */
.single .post {
  padding: 36px;
}

.single .post .post-thumbnail img {
  height: 360px;
}

.single .entry-title {
  font-size: 1.9rem;
}

/* ==========================================================================
   Sidebar
   ========================================================================== */
.sidebar .widget {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.sidebar .widget-title {
  font-size: 1.1rem;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-text);
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.sidebar li:last-child {
  border-bottom: none;
}

.sidebar a {
  color: var(--color-text-muted);
}

.sidebar a:hover {
  color: var(--color-primary);
}

/* Search form */
.search-form {
  display: flex;
  gap: 8px;
}

.search-form input[type="search"] {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
}

.search-form input[type="search"]:focus {
  border-color: var(--color-primary);
}

.search-form button {
  padding: 10px 16px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  transition: background var(--transition);
}

.search-form button:hover {
  background: var(--color-primary-dark);
}

/* ==========================================================================
   Pagination
   ========================================================================== */
.pagination,
.nav-links {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 30px 0;
  flex-wrap: wrap;
}

.pagination a,
.pagination span,
.nav-links a,
.nav-links span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  background: var(--color-white);
  border-radius: 6px;
  color: var(--color-text);
  font-weight: 500;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.pagination a:hover,
.nav-links a:hover {
  background: var(--color-primary);
  color: white;
}

.pagination .current,
.nav-links .current {
  background: var(--color-primary);
  color: white;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.75);
  padding: 40px 0 24px;
  margin-top: 20px;
}

.footer-widgets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}

.footer-widgets .widget-title {
  color: white;
  font-size: 1.05rem;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 8px;
}

.footer-widgets a {
  color: rgba(255,255,255,0.7);
}

.footer-widgets a:hover {
  color: var(--color-primary-light);
}

.footer-widgets ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-widgets li {
  padding: 5px 0;
}

.site-info {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.9rem;
}

/* ==========================================================================
   Comments
   ========================================================================== */
.comments-area {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 30px;
  box-shadow: var(--shadow);
}

.comment-list {
  list-style: none;
  padding: 0;
}

.comment {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.comment-form input,
.comment-form textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: 12px;
  font-family: inherit;
}

.comment-form input[type="submit"] {
  width: auto;
  background: var(--color-primary);
  color: white;
  border: none;
  cursor: pointer;
  padding: 10px 24px;
  font-weight: 500;
}

.comment-form input[type="submit"]:hover {
  background: var(--color-primary-dark);
}

/* ==========================================================================
   404 / No results
   ========================================================================== */
.no-results,
.error-404 {
  text-align: center;
  padding: 60px 20px;
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.no-results h1,
.error-404 h1 {
  font-size: 2rem;
  margin-bottom: 16px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 992px) {
  .site-main {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .hero-main {
    grid-row: auto;
    min-height: 320px;
  }

  .hero-main .hero-image {
    min-height: 320px;
  }

  .hero-side {
    grid-template-columns: 1fr 1fr;
  }

  .footer-widgets {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: block;
  }

  .main-navigation {
    display: none;
    width: 100%;
    order: 3;
  }

  .main-navigation.is-open {
    display: block;
  }

  .main-navigation ul {
    flex-direction: column;
    gap: 2px;
  }

  .main-navigation a {
    padding: 12px 16px;
  }

  .hero-side {
    grid-template-columns: 1fr;
  }

  .hero-card {
    min-height: 180px;
  }

  .hero-main .hero-title {
    font-size: 1.35rem;
  }

  .post {
    padding: 20px;
  }

  .post .post-thumbnail {
    margin: -20px -20px 16px;
  }

  .post .post-thumbnail img {
    height: 200px;
  }

  .single .post .post-thumbnail img {
    height: 220px;
  }

  .footer-widgets {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .site-container {
    padding: 0 14px;
  }

  .hero-main .hero-overlay {
    padding: 18px;
  }

  .hero-main .hero-title {
    font-size: 1.2rem;
  }
}