/* joostboer.com v2.1.0 — dark/light manifesto */

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

/* ── Dark theme (default) ──────────────────────────────────────────────────── */

:root {
  --bg: #0c0c0e;
  --bg-elevated: #141416;
  --bg-glass: rgba(20, 20, 22, 0.75);
  --text: #e8e6e1;
  --text-body: rgba(232, 230, 225, 0.85);
  --text-secondary: #8a8880;
  --text-muted: #5a5850;
  --accent: #c9a84c;
  --accent-glow: rgba(201, 168, 76, 0.12);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --sidebar-hover: rgba(255, 255, 255, 0.02);
  --code-bg: #141416;
  --code-border: rgba(255, 255, 255, 0.06);
  --glow-opacity: 0.03;
  --sidebar-width: 280px;
  --content-width: 640px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.4s;
  color-scheme: dark;
}

/* ── Light theme ───────────────────────────────────────────────────────────── */

[data-theme="light"] {
  --bg: #fafaf8;
  --bg-elevated: #f0efec;
  --bg-glass: rgba(250, 250, 248, 0.8);
  --text: #1a1a18;
  --text-body: rgba(26, 26, 24, 0.78);
  --text-secondary: #6b6b63;
  --text-muted: #a0a098;
  --accent: #9a7b2e;
  --accent-glow: rgba(154, 123, 46, 0.08);
  --border: rgba(0, 0, 0, 0.07);
  --border-hover: rgba(0, 0, 0, 0.12);
  --sidebar-hover: rgba(0, 0, 0, 0.03);
  --code-bg: #f0efec;
  --code-border: rgba(0, 0, 0, 0.07);
  --glow-opacity: 0.02;
  color-scheme: light;
}

html {
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  transition: background 0.4s var(--ease-in), color 0.4s var(--ease-in);
}

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

/* ── Layout ────────────────────────────────────────────────────────────────── */

.layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ───────────────────────────────────────────────────────────────── */

.sidebar {
  width: var(--sidebar-width);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: background 0.4s var(--ease-in), border-color 0.4s var(--ease-in);
}

.sidebar-header {
  padding: 2.4rem 1.5rem 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.03em;
  transition: color var(--duration) var(--ease);
}

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

/* ── Theme toggle ──────────────────────────────────────────────────────────── */

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all 0.25s var(--ease-in);
  flex-shrink: 0;
}

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

.theme-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 0.4s var(--ease);
}

.theme-toggle:hover svg {
  transform: rotate(15deg);
}

.icon-sun, .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: block; }
/* auto: show sun (switch to light) by default, handled by JS */

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0;
  scrollbar-width: none;
}

.sidebar-nav::-webkit-scrollbar {
  display: none;
}

.sidebar-item {
  display: block;
  padding: 0.65rem 1.5rem;
  text-decoration: none;
  color: var(--text-secondary);
  transition: all 0.25s var(--ease-in);
  position: relative;
}

.sidebar-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 0;
  background: var(--accent);
  transition: height 0.3s var(--ease);
}

.sidebar-item:hover {
  color: var(--text);
  background: var(--sidebar-hover);
}

.sidebar-item.active {
  color: var(--text);
}

.sidebar-item.active::before {
  height: 60%;
}

.sidebar-title {
  display: block;
  font-size: 0.79rem;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.sidebar-date {
  display: block;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.6rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  letter-spacing: 0.04em;
}

/* ── Main content ──────────────────────────────────────────────────────────── */

.content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.articles {
  width: 100%;
  max-width: var(--content-width);
  padding: 0 2rem;
}

/* ── Article ───────────────────────────────────────────────────────────────── */

.post {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--border);
  animation: postReveal 0.6s var(--ease) both;
}

.post:last-child {
  border-bottom: none;
}

@keyframes postReveal {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post.peeking {
  animation: none;
}

.post header {
  margin-bottom: 2.5rem;
}

.post header time {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.post header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin-top: 0.6rem;
  color: var(--text);
}

/* ── Post body typography ──────────────────────────────────────────────────── */

.post-body p {
  margin-bottom: 1.5rem;
  color: var(--text-body);
}

.post-body h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 3rem 0 1rem;
  letter-spacing: -0.03em;
  color: var(--text);
}

.post-body h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2.5rem 0 0.8rem;
  letter-spacing: -0.02em;
}

.post-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 168, 76, 0.3);
  transition: border-color 0.2s;
}

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

.post-body blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 1.3rem;
  margin: 2rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

.post-body ul, .post-body ol {
  margin: 1.3rem 0;
  padding-left: 1.4rem;
  color: var(--text-body);
}

.post-body li {
  margin-bottom: 0.5rem;
}

.post-body code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.82em;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  color: var(--accent);
}

.post-body pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 1.3rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 2rem 0;
  line-height: 1.5;
}

.post-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
}

.post-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

.post-body strong {
  color: var(--text);
  font-weight: 600;
}

.post-body em {
  color: var(--text-body);
}

/* ── Loader ────────────────────────────────────────────────────────────────── */

.loader {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scroll-sentinel {
  height: 1px;
}

/* ── Mobile menu toggle ────────────────────────────────────────────────────── */

.menu-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s;
}

.menu-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 4.5px);
}

.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(4.5px, -4.5px);
}

/* ── Mobile header bar ─────────────────────────────────────────────────────── */

.mobile-bar {
  display: none;
}

/* ── Mobile ────────────────────────────────────────────────────────────────── */

@media (max-width: 860px) {
  .menu-toggle {
    display: none !important;
  }

  .sidebar {
    display: none;
  }

  .mobile-bar {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1.3rem;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.4s var(--ease-in), border-color 0.4s var(--ease-in);
  }

  .mobile-bar .logo {
    font-size: 1rem;
  }

  .mobile-bar .theme-toggle {
    width: 30px;
    height: 30px;
  }

  .content {
    margin-left: 0;
    padding-top: 3.2rem;
  }

  .articles {
    padding: 0 1.3rem;
  }

  .post {
    padding: 2.5rem 0 2.5rem;
  }

  .post header h1 {
    font-size: 1.7rem;
  }

  .post-body p {
    font-size: 0.95rem;
    line-height: 1.8;
  }

  html {
    font-size: 16px;
  }
}

/* ── Subtle ambient glow ───────────────────────────────────────────────────── */

body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    ellipse at 30% 20%,
    rgba(201, 168, 76, var(--glow-opacity)) 0%,
    transparent 50%
  );
  pointer-events: none;
  z-index: -1;
}