/*
 Theme Name: VVN IoT Magazine
 Theme URI: https://vvniot.com
 Author: VN
 Author URI: https://vvniot.com
 Description: Theme blog/magazine chuyên nghiệp cho IoT, lập trình nhúng. Bản tối ưu mobile menu.
 Version: 1.1
 License: GNU General Public License v2 or later
 Text Domain: vvniot-magazine
*/

/* Reset cơ bản */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #f3f4f6;
  color: #111827;
}

a {
  color: #e53935;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header-top {
  padding: 24px 16px 12px;
  border-bottom: 1px solid #eee;
}

.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.site-title {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 4px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.site-description {
  margin: 0;
  font-size: 13px;
  color: #e53935;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Main nav */
.main-nav-wrapper {
  background: #212121;
  border-bottom: 3px solid #e53935;
}

.main-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  position: relative;
}

.primary-menu,
.primary-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-menu {
  display: flex;
  flex-wrap: wrap;
}

.primary-menu > li {
  position: relative;
}

.primary-menu > li > a {
  display: block;
  padding: 14px 18px;
  color: #f9fafb;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  border-right: 1px solid #424242;
}

.primary-menu > li:first-child > a {
  border-left: 1px solid #424242;
}

.primary-menu > li > a:hover,
.primary-menu > li.current-menu-item > a,
.primary-menu > li.current-menu-ancestor > a {
  background: #333333;
  color: #ffffff;
}

.primary-menu li ul {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: #333333;
  display: none;
  z-index: 20;
}

.primary-menu li:hover > ul {
  display: block;
}

.primary-menu li ul li a {
  display: block;
  padding: 10px 14px;
  color: #f9fafb;
  font-size: 13px;
  border-bottom: 1px solid #424242;
}

.primary-menu li ul li a:hover {
  background: #444444;
}

.main-nav-search {
  margin-left: auto;
  padding-left: 16px;
}

.main-nav-search form {
  margin: 0;
}

.main-nav-search input[type="search"] {
  padding: 6px 10px;
  font-size: 13px;
  border-radius: 2px;
  border: none;
  outline: none;
}

/* Layout */
.site-main-wrapper {
  flex: 1;
}

.content-container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px;
  display: flex;
  gap: 24px;
}

.content-area {
  flex: 1 1 0;
}

.sidebar {
  width: 320px;
  flex-shrink: 0;
}

.card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  padding: 16px 18px;
  margin-bottom: 24px;
}

.entry-title a {
  color: inherit;
}

.entry-meta {
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 8px;
}

.entry-excerpt {
  font-size: 14px;
  color: #4b5563;
}

.post-thumbnail {
  margin: -16px -18px 12px;
}

.post-thumbnail img {
  display: block;
  width: 100%;
}

.pagination {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  font-size: 13px;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 12px;
  border-bottom: 2px solid #e5e7eb;
  padding-bottom: 6px;
}

/* Sidebar */
.widget {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  padding: 14px 16px;
  margin-bottom: 20px;
  font-size: 14px;
}

.widget-title {
  font-size: 14px;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 10px;
  text-transform: uppercase;
  border-bottom: 2px solid #e53935;
  padding-bottom: 4px;
}

/* Footer */
.site-footer {
  margin-top: 24px;
  background: #212121;
  color: #f9fafb;
}

.footer-top {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 16px 16px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  border-bottom: 1px solid #424242;
}

.footer-column-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  margin: 0 0 8px;
  border-bottom: 2px solid #e53935;
  display: inline-block;
  padding-bottom: 4px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px 16px;
  font-size: 12px;
  color: #9ca3af;
  text-align: center;
}

.footer-bottom a {
  color: #ff7673;
}

/* Single post */
.single .entry-title {
  font-size: 28px;
  margin-bottom: 8px;
}

.single .entry-meta {
  margin-bottom: 16px;
}

.entry-content {
  font-size: 15px;
  line-height: 1.7;
  color: #111827;
}

.entry-content h2,
.entry-content h3 {
  margin-top: 24px;
  margin-bottom: 8px;
}

.entry-tags {
  margin-top: 16px;
  font-size: 13px;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  font-size: 13px;
}

/* Page hero custom */
.page-hero {
  background: linear-gradient(90deg, #e53935, #ff7043);
  color: #ffffff;
  padding: 32px 16px;
  margin-bottom: 24px;
}

.page-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.page-hero-title {
  margin: 0 0 4px;
  font-size: 26px;
  font-weight: 800;
}

.page-hero-subtitle {
  margin: 0;
  font-size: 14px;
  opacity: 0.9;
}

/* Landing page template */
.landing-hero {
  background: linear-gradient(135deg, #111827, #1f2933);
  color: #ffffff;
  padding: 60px 16px 40px;
}

.landing-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
  gap: 32px;
  align-items: center;
}

.landing-hero-title {
  font-size: 32px;
  margin: 0 0 8px;
  font-weight: 800;
}

.landing-hero-subtitle {
  font-size: 15px;
  margin: 0 0 16px;
  color: #e5e7eb;
}

.landing-hero-list {
  font-size: 14px;
  margin: 0;
  padding-left: 18px;
}

.landing-hero-box {
  background: rgba(17, 24, 39, 0.8);
  border-radius: 4px;
  padding: 16px 18px;
}

.btn-primary {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 999px;
  background: #ffb300;
  color: #111827;
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
}

.btn-primary:hover {
  text-decoration: none;
  background: #ffd54f;
}

.landing-section {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px;
}

.landing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.landing-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  padding: 16px 18px;
  font-size: 14px;
}

.landing-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 16px;
}

/* MOBILE NAV - giống iot47 */
.mobile-menu-toggle {
  display: none;
  cursor: pointer;
  width: 36px;
  height: 32px;
  border: none;
  background: none;
  position: relative;
  margin-left: 8px;
}

.mobile-menu-toggle span {
  display: block;
  height: 3px;
  background: #f9fafb;
  border-radius: 999px;
  position: absolute;
  left: 4px;
  right: 4px;
  transition: transform 0.2s ease, opacity 0.2s ease, top 0.2s ease, bottom 0.2s ease;
}

.mobile-menu-toggle span:nth-child(1) {
  top: 7px;
}
.mobile-menu-toggle span:nth-child(2) {
  top: 14px;
}
.mobile-menu-toggle span:nth-child(3) {
  bottom: 7px;
}

.main-nav-inner.menu-open .mobile-menu-toggle span:nth-child(1) {
  top: 14px;
  transform: rotate(45deg);
}
.main-nav-inner.menu-open .mobile-menu-toggle span:nth-child(2) {
  opacity: 0;
}
.main-nav-inner.menu-open .mobile-menu-toggle span:nth-child(3) {
  bottom: 14px;
  transform: rotate(-45deg);
}

@media (max-width: 960px) {
  .content-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
  }
  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .landing-hero-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header-top {
    text-align: center;
  }

  .site-title {
    font-size: 22px;
  }

  .main-nav-inner {
    flex-wrap: wrap;
    align-items: center;
  }

  /* Hiện nút burger, ẩn menu theo kiểu mobile giống hình */
  .mobile-menu-toggle {
    display: block;
    margin-left: auto;
  }

  .primary-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    background: #2b2b2b;
    border-top: 2px solid #e53935;
    margin-top: 0;
  }

  .main-nav-inner.menu-open .primary-menu {
    display: block;
  }

  .primary-menu > li > a {
    border-right: none;
    border-bottom: 1px solid #424242;
    padding: 12px 18px;
    font-size: 15px;
  }

  .primary-menu li ul {
    position: static;
    display: none;
    border-top: 1px solid #424242;
  }

  .primary-menu li.menu-item-has-children > a::after {
    content: "▸";
    float: right;
    font-size: 12px;
    margin-left: 8px;
  }

  .primary-menu li.open > ul {
    display: block;
  }

  .primary-menu li.open > a::after {
    content: "▾";
  }

  .main-nav-search {
    display: none; /* giống theme iot47: search nằm ở sidebar */
  }

  .content-container {
    padding: 0 12px;
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
  .landing-grid {
    grid-template-columns: 1fr;
  }
}