/*
Theme Name: 月过山海
Theme URI: https://ygsh168.top
Author: Jimmy
Description: Custom magazine-style theme inspired by Emergence Magazine
Version: 1.0.0
Text Domain: jimmy-zone
*/

/* ============================================
   CSS VARIABLES & RESET
   ============================================ */
:root {
  --color-bg: #1C1C1B;
  --color-bg-alt: #31322B;
  --color-text: #C3C3C3;
  --color-text-secondary: #9B8F7F;
  --color-text-on-image: #ffffff;
  --color-accent: #57634F;
  --color-accent-light: #9C9A98;
  --color-overlay: rgba(28, 28, 27, 0.4);
  --color-border: #726E55;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --container-width: 1400px;
  --header-height: 64px;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  padding-top: var(--header-height);
}

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

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

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.35rem; }

p {
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary);
}

.text-on-image {
  color: var(--color-text-on-image);
}

.text-on-image p,
.text-on-image .entry-meta {
  color: rgba(255, 255, 255, 0.75);
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(28, 28, 27, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transition: background 0.3s ease;
}

.site-header.scrolled {
  background: rgba(28, 28, 27, 0.98);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  order: 2;
  margin-left: var(--space-md);
  padding-left: var(--space-md);
  border-left: 1px solid rgba(255,255,255,0.3);
}

.site-logo-img {
  height: 28px;
  width: auto;
  filter: invert(1) brightness(0.9);
}

.site-logo-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--color-text-on-image);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  order: 1;
}

.primary-nav a {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--color-text-on-image);
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.primary-nav a:hover {
  opacity: 1;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all 0.3s ease;
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
  position: relative;
  width: 100%;
  height: 85vh;
  min-height: 500px;
  overflow: hidden;
  margin-bottom: var(--space-2xl);
  background: linear-gradient(160deg, #1C1C1B 0%, #31322B 40%, #57634F 100%);
}

.hero-section .hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-section .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(28, 28, 27, 0) 0%,
    rgba(28, 28, 27, 0.2) 50%,
    rgba(28, 28, 27, 0.7) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-3xl) var(--space-xl);
}

.hero-section .hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
}

.hero-section .hero-tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-md);
}

.hero-section .hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 400;
  color: #fff;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  max-width: 800px;
}

.hero-section .hero-excerpt {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.hero-section .hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #fff;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  transition: border-color 0.3s ease;
}

.hero-section .hero-cta:hover {
  border-color: #fff;
}

/* ============================================
   FEATURED ARTICLE (large)
   ============================================ */
.featured-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
  align-items: center;
}

.featured-article .article-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);
}

.featured-article .article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.featured-article:hover .article-image img {
  transform: scale(1.03);
}

.featured-article .article-content {
  padding: var(--space-lg) 0;
}

.featured-article .article-tag {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.featured-article .article-title {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.featured-article .article-title a:hover {
  opacity: 0.7;
}

.featured-article .article-excerpt {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
}

.featured-article .article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.featured-article .article-meta .author {
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

/* ============================================
   ARTICLE GRID (3 columns)
   ============================================ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.article-card {
  position: relative;
  overflow: hidden;
  min-height: 400px;
}

.article-card .card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
  background: var(--color-bg-alt);
  height: 400px;
}

.article-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.article-card:hover .card-image img {
  transform: scale(1.03);
}

.article-card .card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(28, 28, 27, 0) 40%,
    rgba(28, 28, 27, 0.6) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-lg);
}

.article-card .card-tag {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-sm);
}

.article-card .card-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  color: #fff;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

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

.article-card .card-meta {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ============================================
   ARTICLE LIST (horizontal, editorial)
   ============================================ */
.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.article-list-item {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  align-items: center;
}

.article-list-item .list-image {
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--color-bg-alt);
}

.article-list-item .list-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.article-list-item:hover .list-image img {
  transform: scale(1.02);
}

.article-list-item .list-content .article-tag {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  display: block;
}

.article-list-item .list-content .article-title {
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
}

.article-list-item .list-content .article-excerpt {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ============================================
   SECTION HEADER
   ============================================ */
.section-header {
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.section-header h2 {
  font-size: 1.2rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-body);
  font-weight: 600;
}

.section-header .see-all {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.section-header .see-all:hover {
  color: var(--color-text);
}

/* ============================================
   SINGLE POST
   ============================================ */
.single-hero {
  position: relative;
  width: 100%;
  height: 70vh;
  min-height: 450px;
  overflow: hidden;
}

.single-hero .hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.single-hero .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(28, 28, 27, 0) 30%,
    rgba(28, 28, 27, 0.7) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-3xl) var(--space-xl);
}

.single-hero .hero-content {
  max-width: 800px;
}

.single-hero .hero-tag {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-md);
}

.single-hero .hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400;
  color: #fff;
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.single-hero .hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.05em;
}

.single-hero .hero-meta .author {
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.single-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
}

.single-content p {
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 1.8rem;
}

.single-content h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.single-content h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.single-content img {
  margin: var(--space-xl) 0;
  border-radius: 0;
}

.single-content blockquote {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1.6;
  color: var(--color-text);
}

.single-content blockquote p {
  color: inherit;
  font-style: inherit;
}

/* ============================================
   PAGE TEMPLATE
   ============================================ */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
}

.page-content h1 {
  margin-bottom: var(--space-lg);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.footer-links a {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-copyright {
  width: 100%;
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* ============================================
   LOADING ANIMATION
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

.hero-section .hero-content {
  opacity: 0;
  animation: fadeInUp 1s ease 0.3s forwards;
}

/* .article-card, .article-list-item, .featured-article animations handled by JS IntersectionObserver */

/* ============================================
   HOVER EFFECTS
   ============================================ */
.article-card .card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  transition: background 0.4s ease;
}

.article-card:hover .card-image::after {
  background: rgba(255, 255, 255, 0.05);
}

/* ============================================
   SCROLL PROGRESS BAR
   ============================================ */
.scroll-progress {
  position: fixed;
  top: var(--header-height);
  left: 0;
  height: 2px;
  background: var(--color-accent);
  width: 0%;
  z-index: 999;
  transition: width 0.1s ease;
}