/*
Theme Name: Yellow Tech
Theme URI: https://example.com
Author: Your Name
Author URI: https://example.com
Description: A modern, SEO-optimized WordPress theme with vibrant yellow accents and cutting-edge design for tech-focused websites.
Version: 1.0.0
Requires at least: 6.0
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: yellow-tech
Tags: blog, custom-colors, custom-logo, custom-menu, editor-style, featured-images, footer-widgets, full-width-template, theme-options, threaded-comments, translation-ready
*/

/* ========================================
   CSS VARIABLES - Design System
======================================== */
:root {
  /* Yellow Brand Colors */
  --yellow-primary: #FFD93D;
  --yellow-bright: #FFF44F;
  --yellow-dark: #E6C038;
  --yellow-glow: #FFED4E;
  
  /* Dark Theme */
  --dark-900: #0A0E27;
  --dark-800: #151932;
  --dark-700: #1F2440;
  --dark-600: #2A2F4F;
  
  /* Accent Colors */
  --accent-blue: #4ECBFF;
  --accent-purple: #A78BFA;
  --text-primary: #FFFFFF;
  --text-secondary: #B8BFD8;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  
  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(255, 217, 61, 0.3);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

/* ========================================
   RESET & BASE STYLES
======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  background: linear-gradient(135deg, var(--dark-900) 0%, var(--dark-800) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Background Animation */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255, 217, 61, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(78, 203, 255, 0.05) 0%, transparent 50%);
  animation: backgroundShift 20s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes backgroundShift {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-5%, -5%) rotate(5deg); }
}

a {
  color: var(--yellow-primary);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--yellow-bright);
  text-shadow: 0 0 10px rgba(255, 217, 61, 0.5);
}

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

/* ========================================
   TYPOGRAPHY
======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(135deg, var(--yellow-primary) 0%, var(--yellow-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  position: relative;
  padding-bottom: var(--space-sm);
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--yellow-primary), transparent);
  border-radius: 2px;
}

h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.1rem; }

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

/* ========================================
   LAYOUT
======================================== */
.site {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 1;
}

.site-content {
  flex: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.wide-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ========================================
   HEADER
======================================== */
.site-header {
  background: rgba(10, 14, 39, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 217, 61, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all 0.3s ease;
}

.site-header.scrolled {
  box-shadow: var(--shadow-lg);
  background: rgba(10, 14, 39, 0.95);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0;
  background: linear-gradient(135deg, var(--yellow-primary), var(--yellow-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.site-title a {
  background: linear-gradient(135deg, var(--yellow-primary), var(--yellow-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Navigation */
.main-navigation {
  display: flex;
  align-items: center;
}

.main-navigation ul {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
}

.main-navigation li {
  position: relative;
}

.main-navigation a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
  position: relative;
}

.main-navigation a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--yellow-primary);
  transition: transform 0.3s ease;
}

.main-navigation a:hover::before,
.main-navigation .current-menu-item a::before {
  transform: translateX(-50%) scaleX(1);
}

.main-navigation a:hover,
.main-navigation .current-menu-item a {
  color: var(--yellow-primary);
  background: rgba(255, 217, 61, 0.05);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: 2px solid var(--yellow-primary);
  color: var(--yellow-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

.menu-toggle:hover {
  background: var(--yellow-primary);
  color: var(--dark-900);
  transform: scale(1.05);
}

/* ========================================
   HERO SECTION
======================================== */
.hero-section {
  padding: var(--space-xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 217, 61, 0.15) 0%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5rem);
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.8s ease-out;
}

.hero-description {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-lg);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-cta {
  display: inline-flex;
  gap: var(--space-sm);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--yellow-primary), var(--yellow-bright));
  color: var(--dark-900);
  box-shadow: 0 4px 20px rgba(255, 217, 61, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 217, 61, 0.6);
  color: var(--dark-900);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--yellow-primary);
  color: var(--yellow-primary);
}

.btn-secondary:hover {
  background: rgba(255, 217, 61, 0.1);
  transform: translateY(-2px);
  color: var(--yellow-primary);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   POST GRID
======================================== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-md);
  padding: var(--space-xl) 0;
}

.post-card {
  background: var(--dark-700);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255, 217, 61, 0.1);
  position: relative;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--yellow-primary), var(--accent-blue));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.post-card:hover::before {
  transform: scaleX(1);
}

.post-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--yellow-primary);
}

.post-thumbnail {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--dark-600);
}

.post-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.post-card:hover .post-thumbnail img {
  transform: scale(1.1);
}

.post-content {
  padding: var(--space-md);
}

.post-meta {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.post-category {
  background: rgba(255, 217, 61, 0.2);
  color: var(--yellow-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.75rem;
}

.post-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.post-title a {
  color: var(--text-primary);
  transition: color 0.3s ease;
}

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

.post-excerpt {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.read-more {
  color: var(--yellow-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.3s ease;
}

.read-more:hover {
  gap: 1rem;
}

.read-more::after {
  content: '→';
  transition: transform 0.3s ease;
}

.read-more:hover::after {
  transform: translateX(4px);
}

/* ========================================
   SINGLE POST
======================================== */
.single-post {
  max-width: 800px;
  margin: var(--space-xl) auto;
}

.single-post .post-header {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.single-post .entry-content {
  line-height: 1.8;
  font-size: 1.1rem;
}

.single-post .entry-content p {
  margin-bottom: var(--space-md);
}

.single-post .entry-content img {
  border-radius: var(--radius-md);
  margin: var(--space-md) 0;
  box-shadow: var(--shadow-md);
}

/* ========================================
   FOOTER
======================================== */
.site-footer {
  background: var(--dark-900);
  border-top: 1px solid rgba(255, 217, 61, 0.1);
  padding: var(--space-xl) 0 var(--space-md);
  margin-top: var(--space-xl);
}

.footer-widgets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-widget h3 {
  color: var(--yellow-primary);
  margin-bottom: var(--space-sm);
  font-size: 1.2rem;
}

.footer-widget ul {
  list-style: none;
}

.footer-widget li {
  margin-bottom: var(--space-xs);
}

.footer-widget a {
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.footer-widget a:hover {
  color: var(--yellow-primary);
  padding-left: 5px;
}

.site-info {
  text-align: center;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 217, 61, 0.1);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .main-navigation ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
  }
  
  .main-navigation.toggled ul {
    display: flex;
  }
  
  .posts-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
  }
}

/* ========================================
   UTILITIES
======================================== */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }
.py-xl { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }

/* Accessibility */
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
}

/* WordPress Core Alignment */
.alignleft { float: left; margin-right: var(--space-md); }
.alignright { float: right; margin-left: var(--space-md); }
.aligncenter { display: block; margin: 0 auto; }