/* Smart Shelf AI — Wind-inspired Ghost theme */

:root {
  --color-bg: #ffffff;
  --color-surface: #f7f7f8;
  --color-text: #111111;
  --color-text-secondary: #444444;
  --color-muted: #888888;
  --color-border: #eeeeee;
  --color-accent: #7c3aed;
  --color-accent-hover: #6931c8;
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --max-width: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
}

.site-logo img {
  height: 28px;
}

.logo-mark {
  width: 30px;
  height: 30px;
  background: var(--color-text);
  color: #fff;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-text);
}

/* Main */
.site-main {
  padding: 48px 0 80px;
}

/* Tags */
.post-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--color-accent);
  margin-bottom: 10px;
}

/* Hero section */
.hero-section {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 36px;
  margin-bottom: 64px;
}

/* Featured */
.featured-card {
  display: flex;
  flex-direction: column;
}

.featured-image {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
  margin-bottom: 22px;
}

.featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.featured-card:hover .featured-image img {
  transform: scale(1.02);
}

.featured-title {
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.8px;
  margin: 0 0 14px;
}

.featured-title a:hover {
  color: var(--color-accent);
}

.featured-excerpt {
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}

/* Secondary */
.secondary-column {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.secondary-card {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 18px;
  align-items: center;
}

.secondary-image {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-surface);
}

.secondary-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.secondary-card:hover .secondary-image img {
  transform: scale(1.04);
}

.secondary-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.2px;
  margin: 0;
}

.secondary-title a:hover {
  color: var(--color-accent);
}

/* Placeholder image */
.placeholder-image {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #f0f0f2 0%, #e4e4e7 100%);
  position: relative;
}

.placeholder-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23d4d4d8' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* Subscribe */
.subscribe-section {
  margin-bottom: 64px;
}

.subscribe-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 56px 56px 56px 64px;
  position: relative;
  overflow: hidden;
}

.subscribe-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(#d4d4d8 1.5px, transparent 1.5px);
  background-size: 22px 22px;
  opacity: 0.45;
  pointer-events: none;
}

.subscribe-content {
  position: relative;
  z-index: 1;
}

.subscribe-arrow {
  margin-bottom: 18px;
}

.subscribe-title {
  font-size: clamp(32px, 3.6vw, 46px);
  font-weight: 800;
  letter-spacing: -1px;
  margin: 0 0 16px;
}

.subscribe-text {
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0 0 28px;
  max-width: 420px;
}

.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 440px;
}

.subscribe-input {
  flex: 1;
  padding: 14px 18px;
  font-size: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  outline: none;
  transition: border-color 0.2s ease;
}

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

.subscribe-button {
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s ease;
}

.subscribe-button:hover {
  background: var(--color-accent-hover);
}

.subscribe-media {
  position: relative;
  z-index: 1;
}

.subscribe-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #c4b5fd 0%, #f5d0fe 100%);
  position: relative;
  overflow: hidden;
}

.subscribe-image::before {
  content: "🖥️";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 120px;
  opacity: 0.8;
}

/* Grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.grid-card {
  display: flex;
  flex-direction: column;
}

.grid-image {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
  margin-bottom: 18px;
}

.grid-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

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

.grid-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.3px;
  margin: 0 0 10px;
}

.grid-title a:hover {
  color: var(--color-accent);
}

.grid-excerpt {
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin: 0;
}

/* Article page */
.article-single {
  max-width: 760px;
}

.article-header {
  padding: 20px 0 32px;
}

.article-title {
  font-size: clamp(34px, 4.5vw, 52px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1px;
  margin: 10px 0 16px;
}

.article-excerpt {
  font-size: 18px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin: 0 0 18px;
}

.article-meta {
  font-size: 14px;
  color: var(--color-muted);
}

.article-image {
  margin: 0 0 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.article-image img {
  width: 100%;
}

.article-content {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.article-content h2,
.article-content h3 {
  color: var(--color-text);
  margin-top: 1.8em;
  margin-bottom: 0.6em;
}

.article-content p {
  margin: 0 0 1.2em;
}

.article-content img {
  border-radius: var(--radius);
  margin: 1.5em 0;
}

.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 20px;
  margin: 1.5em 0;
  color: var(--color-text);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 14px;
}

.site-footer a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Scroll top */
.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 14px;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease,
    visibility 0.25s ease;
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.3);
  z-index: 90;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--color-accent-hover);
}

/* Mobile */
@media (max-width: 980px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .subscribe-inner {
    grid-template-columns: 1fr;
    padding: 40px;
  }

  .subscribe-media {
    order: -1;
  }

  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .site-header .container {
    padding: 0 18px;
  }

  .header-inner {
    height: 64px;
  }

  .site-nav {
    gap: 18px;
  }

  .container {
    padding: 0 18px;
  }

  .site-main {
    padding: 32px 0 60px;
  }

  .featured-image {
    border-radius: var(--radius);
    aspect-ratio: 4 / 3;
  }

  .secondary-card {
    grid-template-columns: 100px 1fr;
    gap: 14px;
  }

  .secondary-title {
    font-size: 15px;
  }

  .subscribe-inner {
    padding: 32px 24px;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .subscribe-button {
    width: 100%;
  }

  .post-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .grid-image {
    border-radius: var(--radius);
  }

  .article-content {
    font-size: 16px;
  }
}

/* Ghost Koenig editor image widths */
.kg-width-wide img {
  max-width: 100vw;
  margin-left: 50%;
  transform: translateX(-50%);
}

.kg-width-full img {
  width: 100vw;
  max-width: none;
  margin-left: 50%;
  transform: translateX(-50%);
}

/* Tag / author archive header */
.tag-header {
  padding: 24px 0 40px;
}

.tag-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -1px;
  margin: 0 0 10px;
}

.tag-description {
  font-size: 17px;
  color: var(--color-text-secondary);
  margin: 0;
  max-width: 600px;
}

/* View all posts */
.view-all {
  display: flex;
  justify-content: center;
  margin-top: 48px;
}

.view-all-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}

.view-all-button::after {
  content: "→";
  transition: transform 0.2s ease;
}

.view-all-button:hover {
  background: var(--color-accent-hover);
}

.view-all-button:hover::after {
  transform: translateX(3px);
}