/* TechGuide Daily - Bento Grid Theme Stylesheet */
/* Built with pure CSS3 - Slate 50 / White / Blue 600 Palette */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Bento Grid Color Palette - Light Mode */
  --bg-main: #f8fafc;        /* Slate 50 background */
  --bg-card: #ffffff;        /* Pure White Bento tiles */
  --bg-secondary: #f1f5f9;   /* Slate 100 soft fill */
  --bg-tertiary: #e2e8f0;    /* Slate 200 border / divider */

  --text-main: #0f172a;      /* Slate 900 primary text */
  --text-muted: #475569;     /* Slate 600 secondary text */
  --text-light: #94a3b8;     /* Slate 400 subtle labels */

  --primary: #2563eb;        /* Blue 600 energetic primary */
  --primary-hover: #1d4ed8;  /* Blue 700 active state */
  --primary-light: #dbeafe;  /* Blue 100 soft badge fill */
  --primary-border: #bfdbfe; /* Blue 200 accent border */

  --accent: #3b82f6;         /* Sky Blue accent */
  --dark-block: #0f172a;     /* Slate 900 for dark bento cards */
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;

  --border-color: #e2e8f0;
  --border-focus: #2563eb;

  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.05), 0 1px 2px -1px rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;        /* Standard 16px Bento rounded corner */
  --radius-xl: 20px;        /* Large 20px Bento tile corner */
  --radius-full: 9999px;

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  --container-max: 1200px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-main: #0f172a;       /* Slate 900 background */
  --bg-card: #1e293b;       /* Slate 800 Bento tile */
  --bg-secondary: #334155;  /* Slate 700 soft fill */
  --bg-tertiary: #475569;

  --text-main: #f8fafc;
  --text-muted: #cbd5e1;
  --text-light: #94a3b8;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: #1e3a8a;
  --primary-border: #1d4ed8;

  --accent: #60a5fa;
  --dark-block: #020617;

  --border-color: #334155;
  --border-focus: #60a5fa;

  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Reading Progress Bar */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--primary);
  width: 0%;
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* Header & Sticky Nav (Bento Design Theme) */
.header {
  position: sticky;
  top: 0;
  z-index: 900;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-main);
  letter-spacing: -0.025em;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25);
}

.logo-text span {
  color: var(--primary);
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border-color: var(--primary-border);
}

.btn-search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-search-trigger:hover {
  background-color: var(--bg-card);
  border-color: var(--primary-border);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.search-shortcut {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-light);
}

/* Mobile Nav Drawer */
.mobile-toggle {
  display: none;
}

.mobile-drawer {
  position: fixed;
  top: 4.25rem;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-card);
  z-index: 850;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
  overflow-y: auto;
  border-top: 1px solid var(--border-color);
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-links a {
  display: block;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-weight: 600;
  font-size: 1rem;
  background-color: var(--bg-secondary);
}

.mobile-nav-links a:hover, .mobile-nav-links a.active {
  background-color: var(--primary-light);
  color: var(--primary);
}

/* Hero Section (Bento Theme) */
.hero {
  background-color: var(--bg-main);
  border-bottom: 1px solid var(--border-color);
  padding: 3rem 0 2.5rem 0;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--primary-light);
  border: 1px solid var(--primary-border);
  color: var(--primary-hover);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-main);
  max-width: 820px;
  margin: 0 auto 1rem auto;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 2rem auto;
}

.hero-search-box {
  max-width: 580px;
  margin: 0 auto;
  display: flex;
  gap: 0.5rem;
  background-color: var(--bg-card);
  padding: 0.35rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.hero-search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.75rem 1.25rem;
  outline: none;
  font-size: 0.95rem;
  color: var(--text-main);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--bg-secondary);
  color: var(--text-main);
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
}

/* Category Pills (Bento Theme) */
.category-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 1rem 0;
  margin-bottom: 2rem;
  scrollbar-width: thin;
}

.category-pill {
  white-space: nowrap;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.category-pill:hover,
.category-pill.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

/* Main Content Area */
.main-content {
  padding: 2rem 0 4rem 0;
  flex: 1;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  letter-spacing: -0.02em;
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.15rem;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

.section-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
}

/* Bento Grid System & Layouts */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

/* Bento Tile Article Card */
.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.card-thumb {
  aspect-ratio: 16 / 9;
  background-color: var(--bg-secondary);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-thumb-badge {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  background-color: var(--primary-light);
  color: var(--primary-hover);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid var(--primary-border);
}

.card-thumb-svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body {
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  letter-spacing: -0.015em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

.card-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-light);
}

.card-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text-main);
}

.author-avatar-sm {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-light);
  color: var(--primary-hover);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 800;
}

/* Category Grid (Bento Style) */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.category-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.25rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.category-card:hover {
  border-color: var(--primary-border);
  background-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.category-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.category-count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-light);
}

/* Article Template Layout */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

/* Breadcrumb */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-muted);
  font-weight: 500;
}

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

.breadcrumbs span.sep {
  color: var(--text-light);
  font-size: 0.75rem;
}

.breadcrumbs span.current {
  color: var(--text-main);
  font-weight: 600;
}

/* Article Header */
.article-header {
  margin-bottom: 2rem;
}

.article-category-badge {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background-color: var(--primary-light);
  color: var(--primary-hover);
  font-weight: 800;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
  border: 1px solid var(--primary-border);
}

.article-title-lg {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.author-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.author-avatar-md {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
}

.author-info {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.author-name {
  font-weight: 700;
  color: var(--text-main);
}

.author-role {
  font-size: 0.75rem;
  color: var(--text-light);
}

.meta-dates {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.825rem;
  font-weight: 500;
}

/* Featured Image Banner */
.article-featured-media {
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
}

.article-featured-media svg {
  width: 100%;
  height: auto;
  max-height: 420px;
  display: block;
}

/* Article Body Content */
.article-content {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 1.35rem;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 2.25rem 0 1rem 0;
  color: var(--text-main);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 1.75rem 0 0.85rem 0;
  color: var(--text-main);
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.5rem 1.5rem;
  padding-left: 0.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content strong {
  color: var(--text-main);
  font-weight: 700;
}

/* Callout Boxes (Bento Tile Style) */
.callout-box {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
  border-left: 4px solid;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.callout-tip {
  border-left: 4px solid var(--success);
  background-color: rgba(22, 163, 74, 0.05);
}

.callout-warning {
  border-left: 4px solid var(--warning);
  background-color: rgba(217, 119, 6, 0.05);
}

.callout-note {
  border-left: 4px solid var(--primary);
  background-color: var(--primary-light);
}

.callout-title {
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.callout-tip .callout-title { color: var(--success); }
.callout-warning .callout-title { color: var(--warning); }
.callout-note .callout-title { color: var(--primary); }

/* Table of Contents (Bento Box) */
.toc-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem 0;
  box-shadow: var(--shadow-sm);
}

.toc-header {
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.toc-list li {
  margin: 0;
}

.toc-list li.toc-h3 {
  padding-left: 1.25rem;
  font-size: 0.9rem;
}

.toc-list a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  display: inline-block;
  transition: color var(--transition-fast);
}

.toc-list a:hover, .toc-list a.active {
  color: var(--primary);
  font-weight: 700;
}

/* Steps Block (Bento Tile) */
.step-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.35rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.85rem;
  margin-right: 0.6rem;
}

.step-header {
  display: flex;
  align-items: center;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

/* Step-by-Step Guide Image Box */
.step-guide-box {
  margin: 1.25rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-card);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.step-guide-box:hover {
  border-color: var(--primary-border);
  box-shadow: var(--shadow-md);
}

.step-visual-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
}

.step-guide-box svg,
.step-guide-box img {
  width: 100%;
  height: auto;
  display: block;
  background-color: var(--bg-secondary);
}

.step-caption {
  padding: 0.65rem 1rem;
  font-size: 0.825rem;
  color: var(--text-muted);
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

/* Key Takeaways Box (Bento Tile) */
.takeaways-box {
  background: var(--bg-card);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}

.takeaways-title {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Code Snippet Block */
.code-block {
  background-color: #0f172a;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  padding: 1rem;
  margin: 1rem 0 1.5rem 0;
  overflow-x: auto;
  position: relative;
}

/* FAQ Accordion (Bento Cards) */
.faq-section {
  margin: 2.5rem 0;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 0.75rem;
  background-color: var(--bg-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  text-align: left;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-icon {
  transition: transform var(--transition-fast);
  color: var(--text-light);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.6;
  border-top: 1px solid var(--border-color);
  margin-top: 0.5rem;
  padding-top: 0.85rem;
}

.faq-item.open .faq-answer {
  display: block;
}

/* Social Share Bar */
.social-share-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
  margin: 2rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.share-label {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-right: 0.5rem;
}

.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-share:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--primary);
}

/* Author Box End (Bento Card) */
.author-box-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: center;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}

.author-box-avatar {
  width: 3.75rem;
  height: 3.75rem;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  flex-shrink: 0;
}

.author-box-details h4 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.author-box-details p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

/* Article Navigation Prev/Next (Bento Cards) */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 2.5rem 0;
}

.nav-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.nav-card:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.nav-card-label {
  font-size: 0.725rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
  font-weight: 800;
}

.nav-card-title {
  font-size: 0.925rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Sidebar Styling (Bento Tiles) */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.widget {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.widget-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.widget-list-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.widget-item-num {
  font-weight: 800;
  font-size: 1rem;
  color: var(--primary);
  opacity: 0.8;
  width: 1.25rem;
}

.widget-item-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
}

.widget-item-link:hover {
  color: var(--primary);
}

/* AdSense Placeholders (Bento Tile) */
.ad-placeholder {
  background-color: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 1.5rem 0;
}

.ad-badge {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.ad-content {
  color: var(--text-light);
  font-size: 0.8rem;
  padding: 1.25rem 0;
}

.ad-header-banner {
  max-width: 728px;
  margin: 1rem auto;
}

/* Newsletter Section (Dark Bento Card) */
.newsletter-card {
  background-color: var(--dark-block);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 3.5rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.newsletter-card::after {
  content: '';
  position: absolute;
  bottom: -2rem;
  right: -2rem;
  width: 120px;
  height: 120px;
  background: rgba(37, 99, 235, 0.25);
  border-radius: 9999px;
  filter: blur(24px);
  pointer-events: none;
}

.newsletter-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.newsletter-desc {
  font-size: 0.95rem;
  color: #94a3b8;
  max-width: 500px;
  margin: 0 auto 1.5rem auto;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  max-width: 480px;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid #334155;
  background-color: #1e293b;
  color: #ffffff;
  outline: none;
}

.newsletter-input:focus {
  border-color: var(--primary);
}

/* Search Modal Overlay */
.search-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 4rem 1rem 2rem 1rem;
}

.search-modal-overlay.open {
  display: flex;
}

.search-modal {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 650px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.search-modal-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  gap: 0.75rem;
}

.search-modal-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--text-main);
  outline: none;
}

.search-results-list {
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.search-result-item {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-lg);
  background-color: var(--bg-secondary);
  transition: background-color var(--transition-fast);
  display: block;
}

.search-result-item:hover {
  background-color: var(--primary-light);
}

.search-result-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.search-result-cat {
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 700;
}

.search-result-snippet {
  font-size: 0.825rem;
  color: var(--text-muted);
}

/* Footer (Bento Theme) */
.footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.75rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

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

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.825rem;
  color: var(--text-light);
}

/* Floating Action Buttons */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 2.75rem;
  height: 2.75rem;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-full);
  border: none;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 800;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* Toast Notification */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: #0f172a;
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 1100;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast-container.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Responsive Rules */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2.1rem;
  }
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 1.75rem;
  }
  .hero-search-box {
    flex-direction: column;
    padding: 0.5rem;
  }
  .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }
  .article-title-lg {
    font-size: 1.75rem;
  }
  .article-nav {
    grid-template-columns: 1fr;
  }
}