/**
 * AI Velocity Trading — Research
 * css/research.css
 *
 * Scope: research.html (index) and research/*.html (individual notes).
 * Loaded after the shared stylesheets; classes are prefixed .rs- to avoid conflicts.
 */

body {
  background-color: #040911;
  color: #ffffff;
}

.rs-wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
  box-sizing: border-box;
}

.rs-wrap--narrow {
  max-width: 780px;
}

.rs-eyebrow {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8125rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #2A5CB3;
  margin-bottom: 0.875rem;
}

/* ================================================================
   PAGE HEADER
   ================================================================ */

.rs-header {
  padding: 8rem 0 3.5rem;
  background: radial-gradient(ellipse at 50% 30%, #0b1d3a 0%, #040911 70%);
  border-bottom: 1px solid rgba(42, 92, 179, 0.15);
}

.rs-title {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: #ffffff;
  margin: 0 0 1.25rem;
}

.rs-lede {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: #B8BCC4;
  margin: 0;
  max-width: 64ch;
}

.rs-lede + .rs-lede {
  margin-top: 1rem;
}

.rs-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8125rem;
  color: #8A94A8;
  margin-top: 1.5rem;
}

.rs-meta a {
  color: #5b8dee;
}

/* ================================================================
   RESEARCH INDEX — CATEGORIES + NOTE LIST
   ================================================================ */

.rs-section {
  padding: 3.5rem 0;
}

.rs-section + .rs-section {
  border-top: 1px solid rgba(42, 92, 179, 0.12);
}

.rs-section-heading {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
  margin: 0 0 0.5rem;
}

.rs-section-intro {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #B8BCC4;
  margin: 0 0 1.75rem;
  max-width: 64ch;
}

.rs-note-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rs-note-card {
  display: block;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(180deg, #0F1F3D 0%, #0B1D3A 100%);
  border: 1px solid rgba(42, 92, 179, 0.22);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}

.rs-note-card:hover {
  border-color: rgba(42, 92, 179, 0.6);
  transform: translateY(-2px);
}

.rs-note-list li + li {
  margin-top: 1rem;
}

.rs-note-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8A94A8;
}

.rs-note-title {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  color: #ffffff;
  margin: 0.5rem 0;
}

.rs-note-summary {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.9rem;
  line-height: 1.7;
  color: #B8BCC4;
  margin: 0;
}

.rs-empty {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.9rem;
  color: #8A94A8;
  font-style: italic;
  margin: 0;
}

/* ================================================================
   NOTE ARTICLE
   ================================================================ */

.rs-article {
  padding: 3rem 0 4rem;
}

.rs-article h2 {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  color: #ffffff;
  margin: 3rem 0 1rem;
}

.rs-article h2:first-child {
  margin-top: 0;
}

.rs-article h3 {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1.125rem;
  font-weight: 600;
  color: #ffffff;
  margin: 2rem 0 0.75rem;
}

.rs-article p,
.rs-article li {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: #C8CDD6;
}

.rs-article p {
  margin: 0 0 1.1rem;
}

.rs-article ul,
.rs-article ol {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}

.rs-article li + li {
  margin-top: 0.5rem;
}

.rs-article strong {
  color: #ffffff;
}

.rs-article a {
  color: #5b8dee;
}

/* Key figures */
.rs-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 2rem;
}

.rs-stat {
  background: #0B1D3A;
  border: 1px solid rgba(42, 92, 179, 0.22);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.rs-stat-label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8A94A8;
  margin-bottom: 0.4rem;
}

.rs-stat-value {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 1.375rem;
  font-weight: 600;
  color: #ffffff;
}

.rs-stat-note {
  display: block;
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.75rem;
  color: #8A94A8;
  margin-top: 0.3rem;
}

.rs-pos,
.rs-table td.rs-pos { color: #4CC38A; }
.rs-neg,
.rs-table td.rs-neg { color: #E5675A; }

/* Tables */
.rs-table-wrap {
  overflow-x: auto;
  margin: 0 0 1.5rem;
  border: 1px solid rgba(42, 92, 179, 0.22);
  border-radius: 12px;
}

.rs-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.875rem;
}

.rs-table th,
.rs-table td {
  padding: 0.7rem 0.9rem;
  text-align: right;
  white-space: nowrap;
  border-bottom: 1px solid rgba(42, 92, 179, 0.14);
}

.rs-table th:first-child,
.rs-table td:first-child {
  text-align: left;
}

.rs-table th {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #8A94A8;
  background: #0B1D3A;
}

.rs-table td {
  color: #C8CDD6;
  font-variant-numeric: tabular-nums;
}

.rs-table tr:last-child td {
  border-bottom: none;
}

.rs-table tfoot td {
  font-weight: 600;
  color: #ffffff;
  border-top: 1px solid rgba(42, 92, 179, 0.3);
}

.rs-table-caption {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.8125rem;
  color: #8A94A8;
  margin: -0.75rem 0 1.5rem;
}

/* Callout */
.rs-callout {
  border-left: 3px solid #2A5CB3;
  background: rgba(42, 92, 179, 0.08);
  border-radius: 0 10px 10px 0;
  padding: 1rem 1.25rem;
  margin: 0 0 1.5rem;
}

.rs-callout p:last-child {
  margin-bottom: 0;
}

.rs-disclaimer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(42, 92, 179, 0.18);
}

.rs-article .rs-disclaimer p {
  font-size: 0.8125rem;
  line-height: 1.65;
  color: #8A94A8;
}

.rs-back {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8125rem;
  color: #5b8dee;
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.rs-back:hover {
  text-decoration: underline;
}

/* ================================================================
   SUBSCRIBE
   ================================================================ */

.rs-subscribe {
  padding: 0 0 4rem;
}

.rs-subscribe-card {
  background: linear-gradient(180deg, #0F1F3D 0%, #0B1D3A 100%);
  border: 1px solid rgba(42, 92, 179, 0.3);
  border-radius: 16px;
  padding: 2rem;
}

.rs-subscribe-heading {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: 1.375rem;
  font-weight: 600;
  color: #ffffff;
  margin: 0 0 0.5rem;
}

.rs-subscribe-copy {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #B8BCC4;
  margin: 0 0 1.25rem;
}

.rs-subscribe-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
  position: relative;
}

.rs-subscribe-input {
  width: 100%;
  min-height: 48px;
  padding: 0 1rem;
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 1rem;
  color: #ffffff;
  background: #040911;
  border: 1px solid rgba(42, 92, 179, 0.45);
  border-radius: 10px;
  box-sizing: border-box;
}

.rs-subscribe-input:focus {
  outline: 2px solid #2A5CB3;
  outline-offset: 1px;
}

.rs-subscribe-btn {
  min-height: 48px;
}

.rs-subscribe-consent {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.875rem;
  line-height: 1.5;
  color: #C8CDD6;
  cursor: pointer;
}

.rs-subscribe-consent input {
  margin-top: 0.2rem;
  accent-color: #2A5CB3;
}

.rs-subscribe-legal {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 0.75rem;
  line-height: 1.6;
  color: #8A94A8;
  margin: 1rem 0 0;
}

.rs-subscribe-legal a {
  color: #5b8dee;
}

.rs-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */

@media (max-width: 768px) {
  .rs-wrap {
    padding: 0 1.25rem;
  }

  .rs-header {
    padding: 6.5rem 0 2.5rem;
  }

  .rs-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .rs-note-card {
    padding: 1.25rem;
  }

  .rs-subscribe-card {
    padding: 1.5rem 1.25rem;
  }

  .rs-subscribe-form {
    grid-template-columns: 1fr;
  }
}