/*
Theme Name: Expressive Blue
Theme URI: https://example.com/expressive-blue
Author: ColdP
Author URI: https://example.com
Description: A Material 3 Expressive styled WordPress theme with playful yet elegant UI.
Version: 1.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: expressive-blue
Tags: custom, material-3, expressive, responsive
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Rounded:opsz,wght,FILL,GRAD@20..48,300..700,0..1,-50..200');

:root {
  --md-sys-color-primary: #0B57D0;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-background: #f4f7fb;
  --md-sys-color-surface: #f8fafc;
  --md-sys-color-surface-container: #ffffff;
  --md-sys-color-on-surface: #1b2330;
  --md-sys-color-outline: #d6dde6;

  --md-radius-xl: 32px;
  --md-radius-lg: 24px;
  --md-radius-pill: 999px;

  --md-shadow-sm: 0 4px 16px rgba(11, 87, 208, 0.08);
  --md-shadow-md: 0 10px 30px rgba(11, 87, 208, 0.12);

  --md-transition: all 0.4s cubic-bezier(0.2, 0.0, 0, 1.0);

  --md-max-width: 1200px;
  --md-content-width: 800px;
  --md-card-width: 300px;
}

html[data-theme="dark"] {
  --md-sys-color-primary: #8ab4f8;
  --md-sys-color-on-primary: #0b0f14;
  --md-sys-color-background: #0f1218;
  --md-sys-color-surface: #151a22;
  --md-sys-color-surface-container: #1b2230;
  --md-sys-color-on-surface: #e6ecf5;
  --md-sys-color-outline: #2c3442;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Google Sans', 'Inter', 'MiSans', 'Noto Sans SC', 'LINESeedJP', sans-serif;
  background: var(--md-sys-color-background);
  color: var(--md-sys-color-on-surface);
  line-height: 1.6;
  transition: var(--md-transition);
}

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

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--md-radius-lg);
}

.container {
  width: 100%;
  max-width: var(--md-max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.logo {
  font-size: 1.6rem;
  font-weight: 700;
}

.header-nav {
  display: flex;
  gap: 12px;
}

.nav-pill {
  padding: 10px 18px;
  border-radius: var(--md-radius-pill);
  background: transparent;
  transition: var(--md-transition);
}

.nav-pill:hover {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-shadow-sm);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-form input[type="search"] {
  padding: 10px 16px;
  border-radius: var(--md-radius-pill);
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-container);
  outline: none;
  transition: var(--md-transition);
  color: var(--md-sys-color-on-surface);
}

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

.theme-toggle {
  height: 44px;
  border-radius: var(--md-radius-pill);
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-container);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 14px;
  cursor: pointer;
  transition: var(--md-transition);
  color: var(--md-sys-color-on-surface);
}

.theme-toggle:hover {
  box-shadow: var(--md-shadow-sm);
}

.menu-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--md-radius-pill);
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-container);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--md-transition);
}

.menu-toggle:hover {
  box-shadow: var(--md-shadow-sm);
}

.material-symbols-rounded {
  font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24;
  font-size: 22px;
}

.section {
  margin: 40px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 24px;
}

/* 统一 PINS 与 What's New 卡片宽度 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--md-card-width), var(--md-card-width)));
  gap: 20px;
  justify-content: start;
}

/* PINS 横向滚动区 */
.cards-scroll {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: var(--md-card-width);
  gap: 20px;
  overflow-x: auto;
  overflow-y: visible;
  padding: 12px 8px 24px;
}

.cards-scroll .card {
  width: var(--md-card-width);
}

.card {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--md-radius-xl);
  padding: 20px;
  box-shadow: var(--md-shadow-sm);
  transition: var(--md-transition);
}

/* 悬停仅提升阴影，不缩放 */
.card:hover {
  box-shadow: var(--md-shadow-md);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 12px 0;
}

.card-meta {
  font-size: 0.9rem;
  color: #5b6b80;
}

.card-list {
  display: flex;
  gap: 20px;
  align-items: center;
}

.card-list img {
  width: 160px;
  height: 120px;
  object-fit: cover;
}

/* 单篇文章页对齐与图片缩小 */
.single-article {
  max-width: var(--md-content-width);
  margin: 0 auto;
}

.single-hero {
  max-width: 720px;
  margin: 0 auto 20px;
}

.single-hero img {
  width: 100%;
  height: auto;
  display: block;
}

.single-content {
  max-width: 720px;
  margin: 0 auto;
}

/* 评论区 Material 3 Expressive */
.comments-section {
  background: var(--md-sys-color-surface);
  border-radius: var(--md-radius-xl);
  padding: 24px;
  box-shadow: var(--md-shadow-sm);
}

.comment-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.comment-list .comment {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--md-radius-lg);
  padding: 18px 20px;
  box-shadow: var(--md-shadow-sm);
  border: 1px solid var(--md-sys-color-outline);
}

.comment-list .comment .comment-body {
  display: grid;
  gap: 10px;
}

.comment-list .comment .comment-author {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.comment-list .comment .comment-author img {
  border-radius: 50%;
  width: 44px;
  height: 44px;
}

.comment-list .comment .comment-metadata {
  font-size: 0.85rem;
  color: #6b7a90;
}

.comment-list .comment .comment-content {
  font-size: 1rem;
  line-height: 1.7;
}

.comment-list .reply a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 6px 14px;
  border-radius: var(--md-radius-pill);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-size: 0.9rem;
}

.comment-list .children {
  list-style: none;
  margin: 16px 0 0 16px;
  padding-left: 16px;
  border-left: 2px dashed var(--md-sys-color-outline);
  display: grid;
  gap: 12px;
}

/* 评论表单 */
.comment-form-wrap {
  margin-top: 24px;
}

.comment-form label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--md-radius-lg);
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-container);
  transition: var(--md-transition);
  font-family: inherit;
  color: var(--md-sys-color-on-surface);
}

.comment-form input:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--md-shadow-sm);
}

/* “发布评论”按钮 Material 3 Expressive */
.comment-submit,
.comment-form .form-submit input[type="submit"] {
  margin-top: 12px;
  padding: 12px 22px;
  border: none;
  border-radius: var(--md-radius-pill);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: var(--md-transition);
  box-shadow: 0 8px 18px rgba(11, 87, 208, 0.25);
}

.comment-submit:hover,
.comment-form .form-submit input[type="submit"]:hover {
  box-shadow: 0 12px 26px rgba(11, 87, 208, 0.3);
}

.comment-submit:active,
.comment-form .form-submit input[type="submit"]:active {
  box-shadow: 0 6px 16px rgba(11, 87, 208, 0.2);
}

/* Footer 深色模式适配 */
.site-footer {
  margin-top: 60px;
  padding: 24px 0;
  text-align: center;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border-top: 1px solid var(--md-sys-color-outline);
}

/* 手机端全屏菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 12, 0.45);
  backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: var(--md-transition);
  z-index: 999;
}

.mobile-menu-content {
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border-radius: var(--md-radius-xl);
  margin: 20px;
  padding: 24px;
  display: grid;
  gap: 20px;
  box-shadow: var(--md-shadow-md);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
}

.menu-close {
  width: 40px;
  height: 40px;
  border-radius: var(--md-radius-pill);
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-container);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.mobile-nav {
  display: grid;
  gap: 12px;
}

.mobile-search input[type="search"] {
  width: 100%;
}

.mobile-theme-toggle {
  justify-content: flex-start;
}

/* 菜单打开 */
.menu-open .mobile-menu {
  opacity: 1;
  pointer-events: auto;
}

/* 竖屏布局调整 */
@media (max-width: 768px) {
  .header-nav {
    display: none;
  }

  .desktop-only {
    display: none;
  }

  .mobile-only {
    display: inline-flex;
  }

  .header-inner {
    align-items: center;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .card-list {
    flex-direction: column;
    align-items: flex-start;
  }

  .card-list img {
    width: 100%;
    height: auto;
  }

  .single-hero,
  .single-content {
    max-width: 100%;
  }

  .comments-section {
    padding: 16px;
  }
}

/* 桌面端隐藏移动菜单按钮 */
@media (min-width: 769px) {
  .mobile-only {
    display: none;
  }

  .mobile-menu {
    display: none;
  }
}

.fab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-shadow-md);
  transition: var(--md-transition);
}

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