/* ============================================
   XIAOYU的随笔 - 极简摄影风格主题
   Minimalist Black & White Design
   灵感来源: ncnccn.cn (Ikken主题)
   ============================================ */

/* CSS Variables */
:root {
  /* Colors */
  --color-font-one: #0f0f0f;
  --color-font-two: #484848;
  --color-bg-body: #ffffff;
  --color-bg-gray-one: #f9f9f9;
  --color-bg-gray-two: #f1f1f1;
  --color-elements-one: #0f0f0f;
  --color-elements-two: #e8e8e8;
  --color-accent: #ff6dc4;
  
  /* Fonts */
  --font-primary: 'Josefin Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Mulish', -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  /* Font weights */
  --font-weight-primary-bold: 600;
  --font-weight-secondary-regular: 400;
  --font-weight-secondary-bolder: 700;
}

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

html {
  font-size: 62.5%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-secondary);
  font-size: 19px;
  font-weight: var(--font-weight-secondary-regular);
  line-height: 1.5;
  color: var(--color-font-one);
  background-color: var(--color-bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  word-wrap: break-word;
  word-break: break-word;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-primary-bold);
  line-height: 1.3;
  letter-spacing: -0.018em;
  word-spacing: -0.05em;
  color: var(--color-font-one);
}

a {
  transition: all 0.15s ease;
  text-decoration: none;
  color: var(--color-font-one);
}

a:hover {
  opacity: 0.6;
}

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

ul, ol {
  list-style: none;
}

/* Input styles */
input, textarea {
  font-family: inherit;
  font-size: inherit;
  color: var(--color-font-one);
  border: none;
  border-radius: 0;
  outline: 0;
  background-color: transparent;
  box-shadow: none;
}

input::placeholder, textarea::placeholder {
  color: var(--color-font-one);
  opacity: 0.6;
}

/* ============================================
   GLOBAL LAYOUT
   ============================================ */
.global-overlay {
  position: relative;
  min-height: 100vh;
}

.global-main {
  padding-left: 48px;
}

/* ============================================
   HEADER - Logo & Navigation Area
   ============================================ */
.header-logo {
  position: fixed;
  z-index: 2;
  top: 0px;
  left: 78px;
}

.header-logo a {
  display: block;
}

.header-logo img {
  height: 108px;
  width: auto;
}

/* ============================================
   LEFT SIDEBAR - Vertical Description
   ============================================ */
.sidebar-description {
  position: fixed;
  z-index: 2;
  left: 33px;
  top: calc(50% + 140px);
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: left center;
  font-size: 10px;
  font-weight: var(--font-weight-secondary-bolder);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-font-two);
  white-space: nowrap;
}

/* ============================================
   HAMBURGER MENU - 动态变形为X
   ============================================ */
.menu-trigger {
  position: fixed;
  top: 30px;
  right: 30px;
  z-index: 9999;
  width: 54px;
  height: 54px;
  cursor: pointer;
  background: transparent;
  border: none;
}

.menu-trigger::before,
.menu-trigger::after,
.menu-trigger .hamburger-line {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  height: 3px;
  background-color: #0f0f0f;
  transition: all 0.3s ease;
}

.menu-trigger::before {
  top: 14px;
  transform-origin: center;
}

.menu-trigger::after {
  bottom: 14px;
  transform-origin: center;
}

.menu-trigger .hamburger-line {
  top: 50%;
  transform: translateY(-50%);
}

/* 菜单打开时 - 汉堡变X */
.menu-opened .menu-trigger::before {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.menu-opened .menu-trigger::after {
  bottom: 50%;
  transform: translateY(-50%) rotate(-45deg);
}

.menu-opened .menu-trigger .hamburger-line {
  opacity: 0;
  transform: translateY(-50%) scaleX(0);
}

/* ============================================
   SLIDE MENU
   ============================================ */
.menu-section,
.menu-overlay {
  position: fixed;
  z-index: 999;
  top: 0;
  right: 0;
  bottom: 0;
}

.menu-section {
  visibility: hidden;
  overflow: auto;
  box-sizing: border-box;
  min-width: 320px;
  max-width: 400px;
  height: 100%;
  padding: 60px 50px 50px;
  transition: all 0.5s ease-in-out;
  transform: translateX(100%);
  background-color: var(--color-bg-body);
  -webkit-overflow-scrolling: touch;
}

.menu-overlay {
  width: 100%;
  height: 100%;
  transition: background-color 0.4s ease-in-out;
  pointer-events: none;
}

.menu-opened {
  overflow: hidden;
}

.menu-opened .menu-section {
  visibility: visible;
  transform: translateX(0);
}

.menu-opened .menu-overlay {
  pointer-events: auto;
  background-color: rgba(0, 0, 0, 0.4);
}

/* Navigation */
.nav-section ul {
  margin: 0;
  padding: 0;
  padding-top: 40px;
}

.nav-section li {
  font-size: 22px;
  line-height: 1.8;
  list-style: none;
}

.nav-section li a {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-primary-bold);
  display: inline-block;
  padding: 5px 0;
}

.menu-footer {
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--color-elements-two);
}

.menu-divider {
  /* 功能保留区域 */
}

/* ============================================
   BUTTON - Global Style
   ============================================ */
.global-button {
  font-size: 11px;
  font-weight: var(--font-weight-secondary-bolder);
  display: inline-block;
  padding: 20px 30px;
  cursor: pointer;
  transition-duration: 0.15s;
  transition-property: background-color, color;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-font-one);
  border: 2px solid var(--color-elements-one);
  outline: none;
  background-color: transparent;
}

.global-button:hover {
  color: var(--color-bg-body);
  background-color: var(--color-elements-one);
  opacity: 1;
}

.global-button .btn-cn {
  margin-top: 4px;
  font-weight: var(--font-weight-secondary-regular);
  letter-spacing: 1px;
  display: block;
  font-size: 10px;
}

/* ============================================
   FEATURED LABEL
   ============================================ */
.global-featured {
  font-family: var(--font-primary);
  font-size: 12px;
  font-weight: var(--font-weight-secondary-bolder);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-font-two);
  margin-bottom: 20px;
}

.global-featured-date > div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.global-featured svg {
  width: 6px;
  height: 10px;
}

/* ============================================
   SLIDER SECTION
   ============================================ */
.slider-section {
  position: relative;
  min-height: 100vh;
  padding-left: 0;
}

.slider-carousel {
  height: 100vh;
}

.slider-cell {
  width: 100%;
  height: 100vh;
}

.slider-content {
  display: flex;
  height: 100vh;
  width: 100%;
}

.slider-post-info {
  flex: 0 0 45%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 48px 80px;
}

.slider-tags {
  display: flex;
  gap: 15px;
  margin-bottom: 15px;
}

.slider-tags span {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-font-two);
}

.slider-title {
  font-size: 48px;
  line-height: 1.15;
  margin-bottom: 25px;
  letter-spacing: -0.02em;
}

.slider-title a {
  display: block;
}

.slider-excerpt {
  font-size: 16px;
  color: var(--color-font-two);
  line-height: 1.7;
  margin-bottom: 35px;
  max-width: 450px;
}

.slider-btn {
  align-self: flex-start;
}

.slider-image {
  flex: 1;
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.slider-image-placeholder {
  background-color: var(--color-bg-gray-one);
}

/* Slider Counter - 横向排列 1 — 3 格式 */
/* 使用 absolute 定位，相对于 slider-section */
.slider-counter-wrap {
  position: absolute;
  bottom: 90px;
  right: 40px;
  z-index: 10;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.slider-counter-wrap.is-active {
  display: flex;
}

.slider-counter-main {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.slider-counter-dots {
  display: flex;
  flex-direction: row;
  gap: 6px;
}

.slider-dot-indicator {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #ffffff;
  opacity: 0.3;
  transition: all 0.3s ease;
}

.slider-dot-indicator.active {
  opacity: 1;
}

.slider-current,
.slider-separator,
.slider-total {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-primary-bold);
  font-size: 22px;
  color: #ffffff;
}

/* Flickity Page Dots - 隐藏 */
.flickity-page-dots {
  display: none !important;
}

/* ============================================
   ARTICLE HEADER SECTION - 顶部轮播式布局
   ============================================ */
.article-header-section {
  display: flex;
  min-height: 100vh;
  padding-left: 80px;
}

.article-header-content {
  flex: 0 0 45%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 48px 80px;
}

.article-header-image {
  flex: 0 0 55%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.article-header-image-placeholder {
  background-color: var(--color-bg-gray-one);
}

/* 复用轮播的标签和日期样式 */
.article-header-section .slider-tags {
  display: flex;
  gap: 15px;
  margin-bottom: 15px;
}

.article-header-section .slider-tags span {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-font-two);
}

.article-header-section .global-featured-date {
  margin-bottom: 20px;
}

.article-header-section .global-featured-date span {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--color-font-two);
}

.article-title {
  font-size: 42px;
  line-height: 1.2;
  margin-bottom: 25px;
  letter-spacing: -0.02em;
}

.article-title a {
  color: var(--color-font-one);
}

.article-title a:hover {
  opacity: 0.8;
}

.article-excerpt {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-font-two);
  margin-bottom: 30px;
}

/* Article Divider */
.article-divider {
  height: 1px;
  background-color: var(--color-elements-two);
  margin-left: 128px;
}

/* ============================================
   ARTICLE SECTION - 正文内容
   ============================================ */
.article-section {
  padding: 80px 48px;
  margin-left: 80px;
}

.article-content {
  max-width: 720px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--color-font-one);
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  margin-top: 40px;
  margin-bottom: 20px;
}

.article-content h2 {
  font-size: 28px;
}

.article-content h3 {
  font-size: 22px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
  list-style: disc;
}

.article-content ol li {
  list-style: decimal;
}

.article-content blockquote {
  border-left: 3px solid var(--color-elements-one);
  padding-left: 20px;
  margin: 20px 0;
  font-style: italic;
  color: var(--color-font-two);
}

.article-content code {
  background-color: var(--color-bg-gray-one);
  padding: 2px 6px;
  font-size: 0.9em;
  border-radius: 3px;
}

.article-content pre {
  background-color: var(--color-bg-gray-one);
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0;
}

.article-content pre code {
  background: none;
  padding: 0;
}

.article-content img {
  max-width: 100%;
  height: auto;
  margin: 20px 0;
}

.article-tags {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--color-elements-two);
}

.article-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 12px;
  margin-right: 10px;
  margin-bottom: 10px;
  background-color: var(--color-bg-gray-one);
  color: var(--color-font-two);
  transition: all 0.2s ease;
}

.article-tag:hover {
  background-color: var(--color-font-one);
  color: var(--color-bg-body);
}

/* ============================================
   FRIENDS PAGE - 友链页面
   ============================================ */
.friends-header-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 120px 48px 80px;
  margin-left: 80px;
}

.friends-header-content {
  max-width: 600px;
}

.friends-title {
  font-size: 42px;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.friends-description {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-font-two);
}

.friends-section {
  padding: 0 48px 80px;
  margin-left: 80px;
}

.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.friend-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-bg-gray-one);
  transition: all 0.2s ease;
}

.friend-card:hover {
  background-color: var(--color-bg-gray-two);
  opacity: 1;
}

.friend-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
}

.friend-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.friend-info {
  flex: 1;
  min-width: 0;
}

.friend-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.friend-description {
  font-size: 13px;
  color: var(--color-font-two);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.friends-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--color-font-two);
}

/* ============================================
   LOOP SECTION - Post Grid
   ============================================ */
.loop-section {
  padding: 80px 48px;
}

.loop-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 50px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-elements-two);
}

.loop-title {
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.loop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.loop-item {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-gray-one);
}

.loop-image {
  position: relative;
  min-height: 250px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.loop-image-placeholder {
  background-color: var(--color-bg-gray-two);
}

.loop-image-link {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.loop-content {
  padding: 30px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.loop-item-title {
  font-size: 22px;
  line-height: 1.3;
  margin-bottom: 15px;
  letter-spacing: -0.01em;
}

.loop-item-title a {
  display: block;
}

.global-excerpt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-font-two);
  margin-bottom: 15px;
  flex: 1;
}

.global-tags {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-font-two);
}

.global-tags a {
  margin-right: 10px;
}

.global-tags a:last-child {
  margin-right: 0;
}

.loop-more {
  text-align: center;
  margin-top: 60px;
}

/* ============================================
   SUBSCRIBE SECTION
   ============================================ */
.subscribe-section {
  background-color: var(--color-bg-gray-one);
  padding: 80px 48px;
  text-align: center;
}

.subscribe-title {
  font-size: 32px;
  line-height: 1.3;
  max-width: 600px;
  margin: 0 auto 40px;
  letter-spacing: -0.01em;
}

.subscribe-form {
  max-width: 450px;
  margin: 0 auto;
}

.subscribe-input {
  font-size: 16px;
  display: block;
  width: 100%;
  height: 40px;
  padding: 8px 0;
  text-align: center;
  border-bottom: 1px solid var(--color-elements-two);
  margin-bottom: 30px;
  transition: border-color 0.3s ease;
}

.subscribe-input:focus {
  border-color: var(--color-font-one);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background-color: var(--color-bg-body);
  padding: 80px 48px;
}

.footer-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-elements-two);
}

.footer-nav {
  display: flex;
  gap: 25px;
}

.footer-nav a {
  font-size: 11px;
  font-weight: var(--font-weight-secondary-bolder);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-font-two);
  transition: color 0.15s ease;
}

.footer-nav a:hover {
  color: var(--color-font-one);
  opacity: 1;
}

.footer-social {
  display: flex;
  gap: 20px;
}

.footer-social a {
  color: var(--color-font-two);
  transition: color 0.15s ease;
}

.footer-social a:hover {
  color: var(--color-font-one);
  opacity: 1;
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-copyright {
  text-align: center;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--color-font-two);
  opacity: 0.6;
  padding-top: 25px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .sidebar-description {
    display: none;
  }
  
  .global-main {
    padding-left: 0;
  }
  
  .slider-post-info {
    padding: 100px 48px 60px;
  }
  
  .slider-title {
    font-size: 36px;
  }
  
  .loop-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }
  
  .loop-section,
  .subscribe-section,
  .site-footer,
  .article-section {
    padding-left: 48px;
    padding-right: 48px;
  }
  
  .article-section {
    margin-left: 0;
  }
  
  .article-header-section {
    padding-left: 0;
    flex-direction: column;
  }
  
  .article-header-content {
    flex: none;
    padding: 100px 48px 60px;
  }
  
  .article-header-image {
    flex: none;
    min-height: 40vh;
  }
  
  .article-divider {
    margin-left: 48px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .header-logo {
    left: 20px;
    top: 20px;
  }
  
  .header-logo img {
    height: 72px;
  }
  
  .menu-trigger {
    top: 20px;
    right: 20px;
  }
  
  .slider-content {
    flex-direction: column;
  }
  
  .slider-post-info {
    flex: 1;
    padding: 80px 25px 40px;
    order: 2;
  }
  
  .slider-image {
    flex: none;
    min-height: 40vh;
    order: 1;
  }
  
  .slider-title {
    font-size: 28px;
  }
  
  .slider-excerpt {
    font-size: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  
  .loop-section {
    padding: 50px 20px;
  }
  
  .loop-header {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  .loop-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .loop-content {
    padding: 25px;
  }
  
  .loop-item-title {
    font-size: 18px;
  }
  
  .subscribe-section {
    padding: 50px 20px;
  }
  
  .subscribe-title {
    font-size: 24px;
  }
  
  .site-footer {
    padding: 30px 20px;
  }
  
  .footer-main {
    flex-direction: column;
    gap: 25px;
    text-align: center;
  }
  
  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }
  
  .global-button {
    padding: 15px 25px;
    font-size: 10px;
  }
  
  .flickity-page-dots.is-active {
    display: none !important;
  }
  
  .article-header-section {
    flex-direction: column;
    padding-left: 0;
    min-height: auto;
  }
  
  .article-header-content {
    flex: none;
    padding: 80px 25px 40px;
  }
  
  .article-header-image {
    flex: none;
    min-height: 30vh;
  }
  
  .article-divider {
    margin-left: 25px;
  }
  
  .article-section {
    padding: 50px 25px 60px;
    margin-left: 0;
  }
  
  .article-title {
    font-size: 28px;
  }
  
  .article-content {
    font-size: 16px;
  }
}