/* =========================================================
   SOPAN Articles — design tokens mirrored from SOPAN-Product
   (src/index.css @theme block)
   Direction: Swiss-modern grid discipline + soft bento cards,
   single accent color, generous whitespace, minimal decoration.
   ========================================================= */

@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter/Inter_18pt-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter/Inter_18pt-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter/Inter_18pt-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter/Inter_18pt-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Albert Sans';
  src: url('../fonts/albert/AlbertSans-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Albert Sans';
  src: url('../fonts/albert/AlbertSans-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Albert Sans';
  src: url('../fonts/albert/AlbertSans-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Albert Sans';
  src: url('../fonts/albert/AlbertSans-ExtraBold.woff2') format('woff2');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --font-primary: 'Inter', sans-serif;
  --font-display: 'Albert Sans', sans-serif;

  /* Brand — single accent color discipline */
  --color-brand-apple: #3aa238;
  --color-brand-dark: #294329;
  --color-brand-forest: #2d7f2b;

  /* Neutral */
  --color-neutral-white: #ffffff;
  --color-neutral-light: #e4e7e4;
  --color-neutral-dark: #858c85;

  /* Accent */
  --color-accent-subtle: #e8f6ea;
  --color-accent-light: #bfe9bf;

  /* Nav */
  --color-active-link: #3aa238;
  --color-non-active-link: #294329;

  /* Semantic */
  --color-warning: #b3a75a;
  --color-warning-light: #f6f4eb;
  --color-error: #a33838;
  --color-error-light: #f6ebeb;

  /* Base */
  --color-background: #ffffff;
  --color-foreground: #0a0a0a;
  --color-muted: #f7f8f7;
  --color-muted-foreground: #6b7269;
  --color-border: #e4e7e4;

  /* 8px spacing rhythm */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;

  --radius-sm: 0.625rem;
  --radius: 1.25rem;
  --radius-lg: 1.5rem;
  --shadow-card: 0 24px 60px rgba(41, 67, 41, 0.12);
  --shadow-card-sm: 0 12px 32px rgba(41, 67, 41, 0.08);
  --max-width: 1180px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 200ms var(--ease-out);
}

/* =========================================================
   Reset & base
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-primary);
  color: var(--color-foreground);
  background: var(--color-background);
  font-synthesis: weight style;
  line-height: 1.55;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { padding-left: 1.25rem; }
button { font-family: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-brand-dark);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-2);
}
h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.25rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.625rem, 2.5vw + 1rem, 2.25rem); font-weight: 700; }
h3 { font-size: 1.375rem; font-weight: 700; }

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* Shared button styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: 999px;
  padding: 0.625rem 1.375rem;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.btn-ghost {
  border: 1.5px solid var(--color-brand-dark);
  color: var(--color-brand-dark);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--color-brand-apple); color: var(--color-brand-apple); }
.btn-solid {
  background: var(--color-foreground);
  color: var(--color-neutral-white);
  border: 1.5px solid var(--color-foreground);
}
.btn-solid:hover { background: var(--color-brand-apple); border-color: var(--color-brand-apple); }

/* =========================================================
   Header
   ========================================================= */
.sopan-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.sopan-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}
.sopan-header__logo img { height: 28px; width: auto; }
.sopan-header__logo { display: flex; align-items: center; gap: 0.5rem; }
.sopan-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}
.sopan-nav a {
  position: relative;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-non-active-link);
  transition: color var(--transition);
}
.sopan-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1.5px;
  background: var(--color-active-link);
  transition: width var(--transition);
}
.sopan-nav a:hover { color: var(--color-active-link); }
.sopan-nav a:hover::after,
.sopan-nav .current-menu-item > a::after { width: 100%; }
.sopan-nav .current-menu-item > a { color: var(--color-active-link); }

.sopan-header__actions { display: flex; align-items: center; gap: var(--space-3); }

.sopan-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-brand-dark);
}

/* =========================================================
   Hero
   ========================================================= */
.sopan-hero {
  position: relative;
  padding-block: var(--space-8) var(--space-6);
  background: radial-gradient(circle at 50% 0%, rgba(58, 162, 56, 0.1), transparent 55%);
  text-align: center;
}
.sopan-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-brand-forest);
  margin-bottom: var(--space-3);
}
.sopan-hero__eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-brand-apple);
}
.sopan-hero p {
  max-width: 40rem;
  margin-inline: auto;
  color: var(--color-muted-foreground);
  font-size: 1.125rem;
}

/* =========================================================
   Article grid & cards
   ========================================================= */
.sopan-section { padding-block: var(--space-6); }
.sopan-section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  gap: var(--space-3);
}
.sopan-section__head a {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-brand-forest);
  white-space: nowrap;
}
.sopan-section__head a:hover { color: var(--color-brand-apple); }

.sopan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.sopan-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-neutral-white);
  box-shadow: var(--shadow-card-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.sopan-card:hover,
.sopan-card:focus-within {
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}
.sopan-card__thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-muted);
}
.sopan-card__thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 400ms var(--ease-out);
}
.sopan-card:hover .sopan-card__thumb img { transform: scale(1.06); }
.sopan-card__body { padding: var(--space-4); display: flex; flex-direction: column; gap: 0.625rem; flex: 1; }
.sopan-card__category {
  display: inline-flex;
  align-self: flex-start;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-brand-forest);
  background: var(--color-accent-subtle);
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
}
.sopan-card__title {
  font-size: 1.125rem;
  margin: 0;
}
.sopan-card__title a { transition: color var(--transition); }
.sopan-card__title a:hover { color: var(--color-brand-apple); }
.sopan-card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-muted-foreground);
  margin: 0;
}
.sopan-card__meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-neutral-dark);
  padding-top: var(--space-2);
  font-variant-numeric: tabular-nums;
}
.sopan-card__meta span + span::before { content: '\2022'; margin-right: 0.5rem; }

/* Featured (asymmetric) card — first post on the front page */
.sopan-card--featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: stretch;
}
.sopan-card--featured .sopan-card__thumb { aspect-ratio: auto; height: 100%; }
.sopan-card--featured .sopan-card__body { padding: var(--space-5); justify-content: center; gap: var(--space-2); }
.sopan-card--featured .sopan-card__title { font-size: 1.625rem; font-family: var(--font-display); font-weight: 700; }
.sopan-card--featured .sopan-card__excerpt { font-size: 1rem; -webkit-line-clamp: 3; }

/* =========================================================
   Single article
   ========================================================= */
.sopan-article {
  padding-block: var(--space-6);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--space-6);
}
.sopan-article__header { margin-bottom: var(--space-5); }
.sopan-article__category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-brand-forest);
  letter-spacing: 0.05em;
}
.sopan-article__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-muted-foreground);
  font-size: 0.9375rem;
  margin-top: var(--space-2);
  font-variant-numeric: tabular-nums;
}
.sopan-article__thumb {
  border-radius: var(--radius);
  overflow: hidden;
  margin-block: var(--space-4);
}
.sopan-article__content {
  max-width: 68ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: #23281f;
}
.sopan-article__content p { margin: 0 0 var(--space-3); }
.sopan-article__content h2,
.sopan-article__content h3 { margin-top: var(--space-5); }
.sopan-article__content blockquote {
  border: none;
  border-left: 3px solid var(--color-brand-apple);
  background: none;
  padding-left: var(--space-4);
  margin: var(--space-5) 0;
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-brand-dark);
  font-style: normal;
}
.sopan-article__content img { border-radius: var(--radius); margin-block: var(--space-4); }
.sopan-article__content a { color: var(--color-brand-apple); text-decoration: underline; text-underline-offset: 2px; }
.sopan-article__content pre {
  background: var(--color-brand-dark);
  color: #eafaea;
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.sopan-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-5);
}
.sopan-tags a {
  background: var(--color-muted);
  padding: 0.375rem 0.875rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--color-non-active-link);
  transition: background var(--transition), color var(--transition);
}
.sopan-tags a:hover { background: var(--color-accent-subtle); color: var(--color-brand-forest); }

/* Sidebar — divider-based, no boxes */
.sopan-sidebar { display: flex; flex-direction: column; gap: var(--space-5); }
.sopan-widget {
  padding-top: var(--space-4);
  border-top: 2px solid var(--color-foreground);
}
.sopan-widget__title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
}
.sopan-related-item {
  display: flex;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}
.sopan-related-item:last-child { border-bottom: none; }
.sopan-related-item img {
  width: 60px; height: 60px; object-fit: cover; border-radius: var(--radius-sm); flex-shrink: 0;
}
.sopan-related-item h4 { font-size: 0.9375rem; margin: 0; }
.sopan-related-item h4 a:hover { color: var(--color-brand-apple); }

/* =========================================================
   Pagination
   ========================================================= */
.sopan-pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: var(--space-5);
}
.sopan-pagination a,
.sopan-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  font-size: 0.875rem;
  padding-inline: 0.5rem;
  transition: background var(--transition), color var(--transition);
}
.sopan-pagination .current {
  background: var(--color-foreground);
  color: var(--color-neutral-white);
}
.sopan-pagination a:hover { background: var(--color-accent-subtle); color: var(--color-brand-forest); }

/* =========================================================
   Footer
   ========================================================= */
.sopan-footer {
  background: var(--color-brand-dark);
  color: #d7e6d7;
  padding-block: var(--space-6);
  margin-top: var(--space-6);
}
.sopan-footer a { color: #d7e6d7; transition: color var(--transition); }
.sopan-footer a:hover { color: var(--color-accent-light); }
.sopan-footer__inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-5);
}
.sopan-footer__nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.sopan-footer__bottom {
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.8125rem;
  color: #9db89d;
}

/* =========================================================
   Search / 404
   ========================================================= */
.sopan-search-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--space-5);
}
.sopan-search-form input[type="search"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  transition: border-color var(--transition);
}
.sopan-search-form input[type="search"]:focus {
  outline: none;
  border-color: var(--color-brand-apple);
}
.sopan-search-form button {
  background: var(--color-foreground);
  color: #fff;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.sopan-search-form button:hover { background: var(--color-brand-apple); }
.sopan-empty-state {
  text-align: center;
  padding-block: var(--space-7);
  color: var(--color-muted-foreground);
}

/* =========================================================
   Motion accessibility
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .sopan-card:hover,
  .sopan-card:focus-within { transform: none; }
  .sopan-card:hover .sopan-card__thumb img { transform: none; }
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .sopan-article { grid-template-columns: 1fr; }
  .sopan-grid { grid-template-columns: repeat(2, 1fr); }
  .sopan-card--featured {
    grid-column: span 2;
    grid-template-columns: 1fr;
  }
  .sopan-card--featured .sopan-card__thumb { aspect-ratio: 16 / 10; height: auto; }
}

@media (max-width: 640px) {
  .sopan-grid { grid-template-columns: 1fr; }
  .sopan-card--featured { grid-column: span 1; }
  .sopan-nav { display: none; }
  .sopan-menu-toggle { display: inline-flex; }
}