/* ==========================================================================
   Turing Wire — Main Stylesheet
   Color palette: deep navy + cyan, inspired by the Turing Wire logo
   ========================================================================== */

/* ── Custom properties ───────────────────────────────────────────────────── */

:root,
[data-theme="light"] {
  --bg:            #f4f7ff;
  --bg-card:       #ffffff;
  --bg-header:     #ffffffee;
  --bg-mobile:     #ffffff;
  --fg:            #111827;
  --fg-muted:      #64748b;
  --fg-heading:    #0f172a;
  --accent:        #0891b2;
  --accent-hover:  #0e7490;
  --border:        #dde3f5;
  --border-header: transparent;
  --badge-major-bg:      #0f172a;
  --badge-major-fg:      #f8fafc;
  --badge-notable-border:#94a3b8;
  --badge-notable-fg:    #334155;
}

[data-theme="dark"] {
  --bg:            #060d1f;
  --bg-card:       #0d1732;
  --bg-header:     #060d1fee;
  --bg-mobile:     #060d1f;
  --fg:            #e2e8f0;
  --fg-muted:      #94a3b8;
  --fg-heading:    #f0f4ff;
  --accent:        #22d3ee;
  --accent-hover:  #67e8f9;
  --border:        #1e3055;
  --border-header: transparent;
  --badge-major-bg:      #e2e8f0;
  --badge-major-fg:      #0f172a;
  --badge-notable-border:#334155;
  --badge-notable-fg:    #94a3b8;
}

/* ── Base ────────────────────────────────────────────────────────────────── */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body.tw-body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Semantic color utilities ────────────────────────────────────────────── */

.tw-heading  { color: var(--fg-heading); }
.tw-muted    { color: var(--fg-muted); }
.tw-accent   { color: var(--accent); }
.tw-border   { border-color: var(--border); }
.tw-bg       { background-color: var(--bg); }
.tw-card     { background-color: var(--bg-card); }

/* ── Header ──────────────────────────────────────────────────────────────── */

.tw-header {
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.tw-border-header {
  border-color: var(--border-header);
  transition: border-color 0.2s;
}

.tw-header.scrolled .tw-border-header,
.tw-header.scrolled {
  border-color: var(--border);
}

/* ── Navigation ──────────────────────────────────────────────────────────── */

.tw-nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.625rem;
  border-radius: 0.375rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s, background-color 0.15s;
}

.tw-nav-link:hover {
  color: var(--fg-heading);
  background-color: color-mix(in srgb, var(--border) 60%, transparent);
}

.tw-nav-active {
  color: var(--fg-heading);
  font-weight: 500;
}

.tw-mobile-nav { background-color: var(--bg-mobile); }

/* ── Search ──────────────────────────────────────────────────────────────── */

.tw-search-wrapper { position: relative; }

.tw-search-input {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  color: var(--fg);
  padding: 0.375rem 2rem 0.375rem 0.75rem;
  width: 11rem;
  outline: none;
  transition: width 0.2s ease, border-color 0.15s;
}

.tw-search-input:focus {
  width: 22rem;
  border-color: var(--accent);
}

.tw-search-input::placeholder { color: var(--fg-muted); }

.tw-search-kbd {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--fg-muted);
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0 0.3rem;
  pointer-events: none;
}

/* ── Icon buttons ────────────────────────────────────────────────────────── */

.tw-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.375rem;
  color: var(--fg-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.15s, background-color 0.15s;
}

.tw-icon-btn:hover {
  color: var(--fg-heading);
  background-color: color-mix(in srgb, var(--border) 60%, transparent);
}

/* ── Cards ───────────────────────────────────────────────────────────────── */

.tw-card {
  background-color: var(--bg-card);
  transition: border-color 0.15s;
}

/* ── Impact badges ───────────────────────────────────────────────────────── */

.tw-badge-major {
  background-color: var(--badge-major-bg);
  color: var(--badge-major-fg);
}

.tw-badge-notable {
  border-color: var(--badge-notable-border);
  color: var(--badge-notable-fg);
}

/* ── Breaking strip ──────────────────────────────────────────────────────── */

#breaking-strip {
  background: linear-gradient(90deg, #dc2626, #b91c1c);
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  padding: 0.375rem 0;
}

#breaking-strip a { color: #fff; text-decoration: none; }
#breaking-strip a:hover { text-decoration: underline; }

/* ── Prose (article body) ────────────────────────────────────────────────── */

.tw-prose {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--fg);
  max-width: none;
}

.tw-prose h2,
.tw-prose h3 {
  color: var(--fg-heading);
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

.tw-prose h2 { font-size: 1.25rem; }
.tw-prose h3 { font-size: 1.1rem; }
.tw-prose strong { color: var(--fg-heading); font-weight: 600; }
.tw-prose em { font-style: italic; }
.tw-prose p { margin-top: 0; margin-bottom: 1em; }

.tw-prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  transition: text-decoration-color 0.15s;
}

.tw-prose a:hover { text-decoration-color: var(--accent); }

.tw-prose code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875em;
  background-color: color-mix(in srgb, var(--border) 50%, transparent);
  padding: 0.1em 0.3em;
  border-radius: 0.25em;
}

.tw-prose blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1em;
  color: var(--fg-muted);
  margin: 1em 0;
}

.tw-prose ul, .tw-prose ol { padding-left: 1.5em; margin-bottom: 1em; }
.tw-prose li { margin-bottom: 0.25em; }

.tw-prose strong:first-child {
  display: block;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.25em;
  margin-top: 1.5em;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */

.tw-footer { background-color: var(--bg); }

/* ── Stocks dashboard ────────────────────────────────────────────────────── */

.tw-heatmap { width: 100%; min-height: 400px; }
.tw-index-chart { width: 100%; height: 300px; }
.tw-sparkline-chart { width: 100%; height: 60px; }

.tw-ticker-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
}

.tw-change-pos { color: #16a34a; }
.tw-change-neg { color: #dc2626; }
.tw-change-neu { color: var(--fg-muted); }

/* ── Pagefind search overrides ───────────────────────────────────────────── */

.pagefind-ui {
  --pagefind-ui-scale: 1;
  --pagefind-ui-primary: var(--accent);
  --pagefind-ui-text: var(--fg);
  --pagefind-ui-background: var(--bg-card);
  --pagefind-ui-border: var(--border);
  --pagefind-ui-tag: var(--bg);
}

/* ── Filter chips ────────────────────────────────────────────────────────── */

.tw-filter-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--fg-muted);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  background: transparent;
}

.tw-filter-chip:hover,
.tw-filter-chip.active {
  border-color: var(--accent);
  color: var(--accent);
  background-color: color-mix(in srgb, var(--accent) 8%, transparent);
}

.tw-filter-chip.active { font-weight: 500; }

/* ── Form inputs ─────────────────────────────────────────────────────────── */

.tw-input {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  color: var(--fg);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

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

.tw-input::placeholder { color: var(--fg-muted); }

select.tw-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748b'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.168l3.71-3.938a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  background-size: 1.25rem;
  padding-right: 2.25rem;
  cursor: pointer;
}

.tw-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  background-color: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s, opacity 0.15s;
}

.tw-btn-primary:hover { background-color: var(--accent-hover); }
.tw-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

/* ── Research badges (arXiv + Papers with Code) ─────────────────────────── */

.tw-arxiv-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.45rem;
  border-radius: 0.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  background-color: color-mix(in srgb, #b91c1c 12%, transparent);
  color: #b91c1c;
  border: 1px solid color-mix(in srgb, #b91c1c 30%, transparent);
  transition: background-color 0.15s, color 0.15s;
}

.tw-arxiv-badge:hover {
  background-color: #b91c1c;
  color: #fff;
}

[data-theme="dark"] .tw-arxiv-badge {
  background-color: color-mix(in srgb, #f87171 10%, transparent);
  color: #f87171;
  border-color: color-mix(in srgb, #f87171 30%, transparent);
}

[data-theme="dark"] .tw-arxiv-badge:hover {
  background-color: #f87171;
  color: #0f172a;
}

.tw-pwc-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.45rem;
  border-radius: 0.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  background-color: color-mix(in srgb, #7c3aed 10%, transparent);
  color: #7c3aed;
  border: 1px solid color-mix(in srgb, #7c3aed 30%, transparent);
  transition: background-color 0.15s, color 0.15s;
}

.tw-pwc-badge:hover {
  background-color: #7c3aed;
  color: #fff;
}

[data-theme="dark"] .tw-pwc-badge {
  background-color: color-mix(in srgb, #a78bfa 10%, transparent);
  color: #a78bfa;
  border-color: color-mix(in srgb, #a78bfa 30%, transparent);
}

[data-theme="dark"] .tw-pwc-badge:hover {
  background-color: #a78bfa;
  color: #0f172a;
}

/* Larger variants for article page header */
.tw-arxiv-badge-lg {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 0.375rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  background-color: color-mix(in srgb, #b91c1c 12%, transparent);
  color: #b91c1c;
  border: 1px solid color-mix(in srgb, #b91c1c 30%, transparent);
  transition: background-color 0.15s, color 0.15s;
}

.tw-arxiv-badge-lg:hover {
  background-color: #b91c1c;
  color: #fff;
}

[data-theme="dark"] .tw-arxiv-badge-lg {
  background-color: color-mix(in srgb, #f87171 10%, transparent);
  color: #f87171;
  border-color: color-mix(in srgb, #f87171 30%, transparent);
}

[data-theme="dark"] .tw-arxiv-badge-lg:hover {
  background-color: #f87171;
  color: #0f172a;
}

.tw-pwc-badge-lg {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 0.375rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  background-color: color-mix(in srgb, #7c3aed 10%, transparent);
  color: #7c3aed;
  border: 1px solid color-mix(in srgb, #7c3aed 30%, transparent);
  transition: background-color 0.15s, color 0.15s;
}

.tw-pwc-badge-lg:hover {
  background-color: #7c3aed;
  color: #fff;
}

[data-theme="dark"] .tw-pwc-badge-lg {
  background-color: color-mix(in srgb, #a78bfa 10%, transparent);
  color: #a78bfa;
  border-color: color-mix(in srgb, #a78bfa 30%, transparent);
}

[data-theme="dark"] .tw-pwc-badge-lg:hover {
  background-color: #a78bfa;
  color: #0f172a;
}

/* ── Utilities ───────────────────────────────────────────────────────────── */

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Scroll to top ───────────────────────────────────────────────────────── */

.tw-scroll-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 40;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  background-color: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s, background-color 0.15s;
  transform: translateY(8px);
}

.tw-scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

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

/* ── Scrollbar ───────────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-muted); }

@media (max-width: 640px) {
  .tw-search-input:focus { width: 100%; }
}