/*
 * THE TEKNOLOGIST — Design System
 * Philosophy: Swiss International Typographic Style / Editorial Intelligence
 *
 * Core: IBM Plex type family, warm parchment palette, convergence vertical accent bars
 * Layout: Single column 680px, left-aligned, content-first
 * Decoration: Only the 4px vertical accent bar — color per convergence vertical
 */

@import "tailwindcss";

/* ─── Convergence Vertical Colors ───────────────────────────────────────── */
:root {
  --color-biotech: #2ECC71;
  --color-robotics: #3498DB;
  --color-ai: #9B59B6;
  --color-infrastructure: #E67E22;
  --color-manufacturing: #F1C40F;
  --color-news: #E74C3C;
  --color-tekfinds: #1ABC9C;

  --radius: 0.125rem;

  /* Warm parchment light theme */
  --background: oklch(0.978 0.006 80);
  --foreground: oklch(0.165 0.008 65);
  --card: oklch(0.985 0.004 80);
  --card-foreground: oklch(0.165 0.008 65);
  --secondary: oklch(0.945 0.008 80);
  --secondary-foreground: oklch(0.35 0.008 65);
  --muted: oklch(0.945 0.008 80);
  --muted-foreground: oklch(0.52 0.012 65);
  --border: oklch(0.88 0.008 80);
  --primary: oklch(0.165 0.008 65);
  --primary-foreground: oklch(0.978 0.006 80);
}

.dark {
  --background: oklch(0.148 0.006 65);
  --foreground: oklch(0.895 0.008 80);
  --card: oklch(0.185 0.006 65);
  --card-foreground: oklch(0.895 0.008 80);
  --secondary: oklch(0.22 0.006 65);
  --secondary-foreground: oklch(0.72 0.008 80);
  --muted: oklch(0.22 0.006 65);
  --muted-foreground: oklch(0.58 0.010 80);
  --border: oklch(1 0 0 / 10%);
  --primary: oklch(0.895 0.008 80);
  --primary-foreground: oklch(0.148 0.006 65);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  line-height: 1.6;
}

/* ─── Container ─────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 640px) {
  .container { padding-left: 2rem; padding-right: 2rem; }
}

/* ─── Typography Utilities ──────────────────────────────────────────────── */
.wordmark {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.font-serif { font-family: 'IBM Plex Serif', Georgia, serif; }
.font-mono  { font-family: 'IBM Plex Mono', monospace; }

/* ─── Vertical Color Bars ───────────────────────────────────────────────── */
.vertical-bar {
  width: 4px;
  flex-shrink: 0;
  border-radius: 2px;
  transition: width 150ms ease;
}

/* ─── Vertical accent text/bar colors ──────────────────────────────────── */
.text-biotech        { color: var(--color-biotech); }
.text-robotics       { color: var(--color-robotics); }
.text-ai             { color: var(--color-ai); }
.text-infrastructure { color: var(--color-infrastructure); }
.text-manufacturing  { color: var(--color-manufacturing); }
.text-news           { color: var(--color-news); }
.text-tekfinds       { color: var(--color-tekfinds); }

.bar-biotech        { background-color: var(--color-biotech); }
.bar-robotics       { background-color: var(--color-robotics); }
.bar-ai             { background-color: var(--color-ai); }
.bar-infrastructure { background-color: var(--color-infrastructure); }
.bar-manufacturing  { background-color: var(--color-manufacturing); }
.bar-news           { background-color: var(--color-news); }
.bar-tekfinds       { background-color: var(--color-tekfinds); }

/* ─── Post Card ─────────────────────────────────────────────────────────── */
.post-card {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: background-color 150ms ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.post-card:first-child { border-top: 1px solid var(--border); }
.post-card:hover {
  background-color: color-mix(in oklch, var(--secondary) 50%, transparent);
  margin: 0 -1.5rem;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.post-card:hover .vertical-bar { width: 6px; }

/* ─── Filter Tabs ───────────────────────────────────────────────────────── */
.filter-tab {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0;
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--muted-foreground);
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease;
  text-decoration: none;
}
.filter-tab:hover { color: var(--foreground); }
.filter-tab.active { color: var(--foreground); border-bottom-color: var(--foreground); }
.filter-tab[data-vertical="biotech"].active        { color: var(--color-biotech); border-bottom-color: var(--color-biotech); }
.filter-tab[data-vertical="robotics"].active       { color: var(--color-robotics); border-bottom-color: var(--color-robotics); }
.filter-tab[data-vertical="ai"].active             { color: var(--color-ai); border-bottom-color: var(--color-ai); }
.filter-tab[data-vertical="infrastructure"].active { color: var(--color-infrastructure); border-bottom-color: var(--color-infrastructure); }
.filter-tab[data-vertical="manufacturing"].active  { color: var(--color-manufacturing); border-bottom-color: var(--color-manufacturing); }
.filter-tab[data-vertical="news"].active           { color: var(--color-news); border-bottom-color: var(--color-news); }
.filter-tab[data-vertical="tekfinds"].active       { color: var(--color-tekfinds); border-bottom-color: var(--color-tekfinds); }

/* ─── Hero Section ──────────────────────────────────────────────────────── */
.hero {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg,
    color-mix(in oklch, var(--background) 95%, var(--color-ai) 5%) 0%,
    var(--background) 60%
  );
}

/* ─── Navigation ────────────────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  background-color: var(--background);
  position: sticky;
  top: 0;
  z-index: 50;
}

/* ─── Prose (Brief Post) ────────────────────────────────────────────────── */
.prose-brief {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--foreground);
  max-width: 100%;
}
.prose-brief h2 {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1.125rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.prose-brief h3 {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.prose-brief p { margin-bottom: 1rem; }
.prose-brief strong { font-weight: 600; }
.prose-brief em { font-style: italic; color: var(--muted-foreground); }
.prose-brief a {
  color: var(--foreground);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--muted-foreground);
  transition: text-decoration-color 0.15s ease;
}
.prose-brief a:hover { text-decoration-color: var(--foreground); }
.prose-brief strong a { font-weight: 600; text-decoration-thickness: 1.5px; }
.prose-brief em a { font-style: italic; text-decoration-thickness: 1px; }
.prose-brief hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
.prose-brief ol, .prose-brief ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.prose-brief li { margin-bottom: 0.25rem; }
.prose-brief blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--muted-foreground);
  font-style: italic;
  margin: 1.5rem 0;
}

/* ─── Animations ────────────────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-entry {
  animation: fadeInUp 200ms ease forwards;
  opacity: 0;
}

/* ─── Utilities ─────────────────────────────────────────────────────────── */
.scrollbar-none { -ms-overflow-style: none; scrollbar-width: none; }
.scrollbar-none::-webkit-scrollbar { display: none; }

/* ─── Dark mode toggle button ───────────────────────────────────────────── */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted-foreground);
  padding: 0.25rem;
  transition: color 150ms ease;
  display: flex;
  align-items: center;
}
.theme-toggle:hover { color: var(--foreground); }

/* ─── Inline signal pill badges ─────────────────────────────────────────── */
.signal-pill,
.brain-pill {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border: 1px solid currentColor;
  border-radius: 2px;
  display: inline-block;
}

/* ─── Search input ──────────────────────────────────────────────────────── */
.search-input {
  width: 100%;
  padding: 0.625rem 0.875rem 0.625rem 2.25rem;
  background-color: color-mix(in oklch, var(--secondary) 50%, transparent);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 0.875rem;
  color: var(--foreground);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  outline: none;
}
.search-input::placeholder { color: var(--muted-foreground); }
.search-input:focus { box-shadow: 0 0 0 1px color-mix(in oklch, var(--foreground) 20%, transparent); }