/* ============================================================
   Esteve Castells — Editorial Premium Theme
   ============================================================ */

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

:root {
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Instrument Sans', -apple-system, sans-serif;
  --max-w: 740px;
  --max-w-wide: 1080px;
  --radius: 4px;

  /* Light: warm ivory editorial */
  --bg: #FAFAF7;
  --bg-elevated: #FFFFFF;
  --bg-subtle: #F2F1EC;
  --text: #1C1917;
  --text-secondary: #78716C;
  --text-tertiary: #A8A29E;
  --accent: #B8965A;
  --accent-hover: #9A7B45;
  --accent-subtle: rgba(184, 150, 90, 0.08);
  --border: #E7E5E0;
  --border-light: #F0EEEA;
  --code-bg: #F5F4F0;
  --shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.04);
  --shadow-md: 0 4px 16px rgba(28, 25, 23, 0.06);
  --shadow-lg: 0 8px 32px rgba(28, 25, 23, 0.08);
}

[data-theme="dark"] {
  --bg: #111110;
  --bg-elevated: #1A1918;
  --bg-subtle: #1F1E1C;
  --text: #EDEDEC;
  --text-secondary: #A8A29E;
  --text-tertiary: #6B6560;
  --accent: #D4B07A;
  --accent-hover: #E8C994;
  --accent-subtle: rgba(212, 176, 122, 0.07);
  --border: #2A2826;
  --border-light: #222120;
  --code-bg: #1C1B19;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --bg: #111110;
    --bg-elevated: #1A1918;
    --bg-subtle: #1F1E1C;
    --text: #EDEDEC;
    --text-secondary: #A8A29E;
    --text-tertiary: #6B6560;
    --accent: #D4B07A;
    --accent-hover: #E8C994;
    --accent-subtle: rgba(212, 176, 122, 0.07);
    --border: #2A2826;
    --border-light: #222120;
    --code-bg: #1C1B19;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  }
}

/* === Theme Toggle Icons === */
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] .icon-sun { display: none; }
  [data-theme="auto"] .icon-moon { display: block; }
}

/* === Base === */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease, color 0.3s ease;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* === Entrance Animation === */
.fade-in {
  animation: fadeUp 0.5s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Header === */
header {
  background: var(--bg);
  transition: background 0.3s ease;
}

.header-inner {
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 2rem;
}

nav {
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.logo-group {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: color 0.3s ease;
  line-height: 1.2;
}

.logo:hover { color: var(--accent); }

.logo-sub {
  font-size: 0.675rem;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-lang {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-decoration: none;
  padding: 0.25rem 0.35rem;
  border-radius: 2px;
  transition: color 0.2s ease;
  letter-spacing: 0.04em;
}

.nav-lang:hover { color: var(--text); }

.nav-lang.active {
  color: var(--accent);
  font-weight: 600;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

.theme-toggle {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  transition: color 0.3s ease;
}

.theme-toggle:hover { color: var(--accent); }

/* Gold accent rule under nav */
.header-rule {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--accent) 25%, var(--accent) 75%, transparent 100%);
  opacity: 0.3;
}

/* === Main === */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem 2rem 4rem;
  width: 100%;
  flex: 1;
}

/* === Post List === */
.list-header {
  margin-bottom: 3rem;
}

.post-list h1 {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.post-list .list-desc {
  color: var(--text-secondary);
  margin-bottom: 0;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* === Language Switcher === */
.lang-switcher {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.lang-btn {
  font-size: 0.775rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
  border-radius: 3px;
  text-decoration: none;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  border: 1px solid transparent;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}

.lang-btn:hover {
  color: var(--text);
  border-color: var(--border);
}

.lang-btn.active {
  color: var(--accent);
  background: var(--accent-subtle);
  border-color: var(--accent);
  font-weight: 600;
}

.posts {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

/* === Post Card === */
.post-card {
  display: block;
  padding: 1.75rem 0;
  text-decoration: none;
  color: var(--text);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
}

.post-card:first-child {
  border-top: 1px solid var(--border-light);
}

.post-card:hover {
  padding-left: 1rem;
}

.post-card:hover .card-title {
  color: var(--accent);
}

.post-card .card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
  font-size: 0.775rem;
  color: var(--text-tertiary);
}

.post-card .card-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.35rem;
  line-height: 1.35;
  transition: color 0.3s ease;
  letter-spacing: -0.01em;
}

.post-card .card-excerpt {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* === Badges === */
.category-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

.category-badge:hover { color: var(--accent-hover); }

.lang-badge {
  font-size: 0.675rem;
  font-weight: 500;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  background: var(--accent-subtle);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.meta-dot {
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--text-tertiary);
  flex-shrink: 0;
}

/* === Single Post === */
.post-header {
  margin-bottom: 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.post-header h1 {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 640px;
}

.translations {
  margin-top: 1rem;
  font-size: 0.825rem;
  color: var(--text-tertiary);
}

.translations a {
  color: var(--accent);
  text-decoration: none;
  margin-left: 0.5rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* Gold rule between header and content */
.post-rule {
  width: 48px;
  height: 1px;
  background: var(--accent);
  margin: 2.25rem 0;
  opacity: 0.5;
}

/* === Post Content === */
.post-content {
  font-size: 1.075rem;
  line-height: 1.85;
  color: var(--text);
}

.post-content > *:first-child { margin-top: 0; }

.post-content h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  margin: 3rem 0 1rem;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.post-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.01em;
}

.post-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 2rem 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.post-content p {
  margin-bottom: 1.35rem;
}

.post-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.post-content a:hover {
  color: var(--accent-hover);
  border-color: var(--accent-hover);
}

.post-content strong { font-weight: 600; }

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 2rem 0;
  box-shadow: var(--shadow-md);
}

.post-content ul, .post-content ol {
  margin: 0 0 1.35rem 1.25rem;
}

.post-content li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

.post-content li::marker {
  color: var(--accent);
}

.post-content blockquote {
  border-left: 2px solid var(--accent);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--accent-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-secondary);
  font-style: italic;
}

.post-content blockquote p:last-child { margin-bottom: 0; }

.post-content code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
  border: 1px solid var(--border-light);
}

.post-content pre {
  background: var(--code-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border);
}

.post-content pre code {
  background: none;
  padding: 0;
  border: none;
  font-size: 0.85rem;
  line-height: 1.7;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
}

.post-content th, .post-content td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
}

.post-content th {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.post-content iframe {
  max-width: 100%;
  margin: 2rem 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.post-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 3rem 0;
}

/* === Static Page === */
.page h1 {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 400;
  margin-bottom: 0;
  letter-spacing: -0.02em;
}

.page-content {
  line-height: 1.85;
  font-size: 1.05rem;
}

.page-content p { margin-bottom: 1.15rem; }

.page-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  transition: color 0.3s ease;
}

.page-content a:hover { color: var(--accent-hover); }

/* === Footer === */
footer {
  margin-top: auto;
  padding: 0 2rem;
  max-width: var(--max-w-wide);
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.footer-rule {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--accent) 25%, var(--accent) 75%, transparent 100%);
  opacity: 0.15;
  margin-bottom: 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0 2rem;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-sep { opacity: 0.3; }

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-tertiary);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}

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

/* === Mobile Menu === */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-tertiary);
  align-items: center;
  transition: color 0.3s ease;
}

.menu-toggle:hover { color: var(--accent); }

.menu-toggle .icon-close { display: none; }
.menu-toggle[aria-expanded="true"] .icon-menu { display: none; }
.menu-toggle[aria-expanded="true"] .icon-close { display: block; }

.mobile-menu {
  display: none;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
  border-top: 1px solid var(--border-light);
}

.mobile-menu.open {
  max-height: 320px;
  opacity: 1;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  padding: 1rem 0 0.75rem;
}

.mobile-menu-links a {
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-light);
  letter-spacing: 0.01em;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-menu-links a:last-child { border-bottom: none; }

.mobile-menu-links a:hover,
.mobile-menu-links a:active {
  color: var(--accent);
  padding-left: 0.5rem;
}

.mobile-menu-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0 1rem;
  border-top: 1px solid var(--border-light);
}

.mobile-menu-lang {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.mobile-menu-lang .nav-lang {
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem;
}

body.menu-open { overflow: hidden; }

/* === Responsive === */
@media (max-width: 700px) {
  header { position: sticky; top: 0; z-index: 100; }
  .header-inner { padding: 0 1.25rem; }
  nav { padding: 1rem 0; }
  .logo-sub { font-size: 0.6rem; }

  /* Hide desktop nav, show hamburger */
  .nav-links { display: none; }
  .nav-right { margin-left: auto; }
  .nav-right .nav-lang { display: none; }
  .nav-right > .theme-toggle { display: none; }
  .menu-toggle { display: flex; }
  .mobile-menu { display: block; }

  main { padding: 2.5rem 1.25rem 3rem; }

  .post-list h1 { font-size: 2rem; }
  .post-header h1 { font-size: 2rem; }
  .post-card .card-title { font-size: 1.15rem; }
  .post-card:hover { padding-left: 0; }

  .post-content { font-size: 1rem; }
  .post-content h2 { font-size: 1.4rem; }

  .page h1 { font-size: 1.75rem; }

  .lang-switcher { gap: 0.35rem; }
  .lang-btn { font-size: 0.7rem; padding: 0.3rem 0.65rem; }

  footer { padding: 0 1.25rem; }
  .footer-inner {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

@media (max-width: 440px) {
  .logo { font-size: 1.15rem; }
}