/*
Theme Name: WriterDAO
Theme URI: https://writerdao.vn
Author: WriterDAO
Author URI: https://writerdao.vn
Description: A modern personal blog theme for WriterDAO – sharing knowledge about AI, writing, finance, and life.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: writerdao
Tags: blog, personal, modern, clean
*/

/* ============================================================
   DESIGN TOKENS / CSS VARIABLES
============================================================ */
:root {
  /* Colors */
  --color-primary:       #1B5E38;
  --color-primary-dark:  #144830;
  --color-primary-light: #2A7A4E;
  --color-accent:        #E8A838;
  --color-accent-dark:   #C8901E;

  --color-bg:            #F8F7F4;
  --color-bg-white:      #FFFFFF;
  --color-bg-light:      #F2F1EE;
  --color-bg-dark:       #1B5E38;

  --color-text:          #1A1A1A;
  --color-text-secondary:#555555;
  --color-text-muted:    #888888;
  --color-text-white:    #FFFFFF;

  --color-border:        #E5E3DE;
  --color-border-light:  #F0EDE8;

  --color-badge-ai:      #1B5E38;
  --color-badge-seo:     #2D5AA0;
  --color-badge-finance: #B8520A;
  --color-badge-life:    #6B46C1;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --font-normal:   400;
  --font-medium:   500;
  --font-semibold: 600;
  --font-bold:     700;
  --font-extrabold:800;

  /* Spacing */
  --spacing-1:  0.25rem;
  --spacing-2:  0.5rem;
  --spacing-3:  0.75rem;
  --spacing-4:  1rem;
  --spacing-5:  1.25rem;
  --spacing-6:  1.5rem;
  --spacing-8:  2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;

  /* Border radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  14px;
  --radius-xl:  20px;
  --radius-2xl: 28px;
  --radius-full:9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 8px 24px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-xl:  0 16px 40px rgba(0,0,0,0.12);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow:   400ms ease;

  /* Layout */
  --container-max: 1200px;
  --container-px:  1.5rem;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: 1.2;
  color: var(--color-text);
}

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

.section {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-10) 0;
}

/* Section heading */
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-8);
}

.section-title h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.section-title h2::after {
  content: '•';
  color: var(--color-accent);
  font-size: var(--text-lg);
}

.section-title a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  transition: color var(--transition-fast);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-white);
  border: 2px solid var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

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

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text-white);
  border: 2px solid var(--color-accent);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

/* Badge / Tag */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: var(--font-semibold);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.badge-primary {
  background: var(--color-primary);
  color: white;
}

.badge-accent {
  background: var(--color-accent);
  color: white;
}

.badge-light {
  background: var(--color-bg-light);
  color: var(--color-text-secondary);
}

/* Card base */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Label above heading */
.label-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-3);
}

.label-tag::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* Avatar group */
.avatar-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.avatar-group .avatars {
  display: flex;
}

.avatar-group .avatars img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid white;
  margin-left: -8px;
  object-fit: cover;
}

.avatar-group .avatars img:first-child {
  margin-left: 0;
}

.avatar-group span {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

/* Author meta */
.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.post-meta .author {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.post-meta .author img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

/* Read time */
.read-time {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-bg-light);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

/* Grid utilities */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-6); }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--spacing-4); }

/* Flex utilities */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* Text utilities */
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--text-sm); }
.text-lg { font-size: var(--text-lg); }
.font-bold { font-weight: var(--font-bold); }
.font-semibold { font-weight: var(--font-semibold); }

/* Divider */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-6) 0;
}

/* Ad slot */
.ad-slot {
  background: var(--color-bg-light);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--spacing-4);
  min-height: 90px;
  text-align: center;
  margin: var(--spacing-6) 0;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ============================================================
   WORDPRESS CORE CLASSES
============================================================ */
.alignleft  { float: left; margin-right: 1.5rem; margin-bottom: 1rem; }
.alignright { float: right; margin-left: 1.5rem; margin-bottom: 1rem; }
.aligncenter { display: block; margin: 0 auto 1rem; }
.alignwide  { width: 100%; }
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: var(--text-sm); color: var(--color-text-muted); text-align: center; margin-top: 0.5rem; }

/* ============================================================
   RESPONSIVE BREAKPOINTS
============================================================ */
@media (max-width: 1024px) {
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --container-px: 1rem;
    --header-height: 64px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5 { grid-template-columns: 1fr; }

  .section { padding: var(--spacing-10) 0; }
}