/* === RESEARCH PAGES === */

/* NAV */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4rem;
  height: 56px;
  background: rgba(8, 8, 10, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--fg);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-link:hover { color: var(--fg); }

/* === RESEARCH INDEX === */
.research-main {
  padding-top: 56px;
}

.research-hero {
  padding: 5rem 4rem 3rem;
  max-width: 800px;
}

.research-title {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
  margin-top: 0.5rem;
}

.research-subtitle {
  font-size: 1rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 600px;
}

.research-list {
  padding: 0 4rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-width: 900px;
}

.research-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem 2.25rem;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.research-card:hover {
  border-color: rgba(245, 166, 35, 0.3);
  background: var(--bg-card-hover);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.card-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 0.2rem 0.5rem;
  border: 1px solid rgba(245, 166, 35, 0.25);
  border-radius: 2px;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.card-excerpt {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.card-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* Subscribe section */
.research-subscribe {
  padding: 4rem;
  border-top: 1px solid var(--border);
}

.subscribe-box {
  max-width: 580px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2.5rem;
}

.subscribe-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.subscribe-heading {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}

.subscribe-body {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.subscribe-form {
  display: flex;
  gap: 0.75rem;
}

.subscribe-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: 0.65rem 1rem;
  outline: none;
  transition: border-color 0.15s;
}
.subscribe-input:focus { border-color: rgba(245, 166, 35, 0.4); }
.subscribe-input::placeholder { color: var(--fg-muted); }

.subscribe-btn {
  background: var(--accent);
  color: #08080a;
  border: none;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.65rem 1.25rem;
  cursor: pointer;
  transition: opacity 0.15s;
}
.subscribe-btn:hover { opacity: 0.85; }

.subscribe-success {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--green);
  padding: 0.75rem 1rem;
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.2);
  border-radius: 4px;
}

.subscribe-error {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--red);
  padding: 0.75rem 1rem;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.2);
  border-radius: 4px;
}

/* === BRIEF PAGE === */
.brief-main {
  padding-top: 56px;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
  padding-bottom: 6rem;
}

.brief-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  display: inline-block;
  margin-bottom: 1.5rem;
  transition: color 0.15s;
}
.back-link:hover { color: var(--fg); }

.brief-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  margin-top: 0.5rem;
}

.brief-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
}

.brief-author a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s;
}
.brief-author a:hover { opacity: 0.7; }
.brief-sep { color: var(--fg-dim); }

/* TL;DR box */
.brief-tldr {
  background: rgba(245, 166, 35, 0.06);
  border: 1px solid rgba(245, 166, 35, 0.2);
  border-radius: 4px;
  margin: 2.5rem 0;
  overflow: hidden;
}

.tldr-header {
  padding: 0.75rem 1.5rem;
  background: rgba(245, 166, 35, 0.08);
  border-bottom: 1px solid rgba(245, 166, 35, 0.15);
}

.tldr-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.tldr-table {
  width: 100%;
  border-collapse: collapse;
}

.tldr-table tr {
  border-bottom: 1px solid rgba(245, 166, 35, 0.1);
}
.tldr-table tr:last-child { border-bottom: none; }

.tldr-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  text-align: left;
  padding: 0.75rem 1.5rem;
  width: 40%;
  vertical-align: top;
  background: rgba(245, 166, 35, 0.04);
}

.tldr-table td {
  font-size: 0.82rem;
  color: var(--fg);
  padding: 0.75rem 1.5rem;
  vertical-align: top;
  line-height: 1.5;
}

/* Sections */
.brief-section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}
.brief-section:last-of-type { border-bottom: none; }

.section-heading {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1.75rem;
  color: var(--fg);
}

/* Findings */
.brief-finding {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.brief-finding:last-child { margin-bottom: 0; }

.finding-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  padding-top: 0.15rem;
  line-height: 1.4;
}

.finding-body {}

.finding-heading {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--fg);
  line-height: 1.4;
}

.finding-text {
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.finding-source {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.03em;
  opacity: 0.7;
  transition: opacity 0.15s;
}
.finding-source:hover { opacity: 1; }

/* Implications */
.brief-implication {
  margin-bottom: 1.75rem;
}
.brief-implication:last-child { margin-bottom: 0; }

.implication-heading {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

.implication-text {
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Actions */
.brief-action {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
}
.brief-action:last-child { margin-bottom: 0; }

.action-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.4;
}

.action-body {}

.action-heading {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

.action-text {
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.action-instruction {
  font-size: 0.82rem;
  color: var(--fg);
  background: rgba(245, 166, 35, 0.06);
  border: 1px solid rgba(245, 166, 35, 0.15);
  border-radius: 3px;
  padding: 0.6rem 0.875rem;
  line-height: 1.5;
}

.action-instruction-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-right: 0.4rem;
}

/* Sources */
.brief-sources {
  padding-top: 3rem;
}

.sources-list {
  padding-left: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.source-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.source-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  min-width: 1.5rem;
}

.source-link {
  font-size: 0.82rem;
  color: var(--fg-muted);
  text-decoration: none;
  line-height: 1.5;
  transition: color 0.15s;
}
.source-link:hover { color: var(--accent); }

/* Brief subscribe CTA */
.brief-subscribe {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-top: 3rem;
  gap: 1rem;
}

.brief-subscribe-text {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.brief-subscribe-text strong {
  color: var(--fg);
  font-family: var(--font-mono);
}

.brief-subscribe-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.04em;
  white-space: nowrap;
  border: 1px solid var(--accent);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
}
.brief-subscribe-btn:hover {
  background: var(--accent);
  color: #08080a;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .site-nav { padding: 0 2rem; }
  .research-hero { padding: 4rem 2rem 2rem; }
  .research-list { padding: 0 2rem 3rem; }
  .research-subscribe { padding: 3rem 2rem; }
  .brief-main { padding-left: 1.5rem; padding-right: 1.5rem; }
}

@media (max-width: 600px) {
  .nav-links { gap: 1.25rem; }
  .nav-link { font-size: 0.65rem; }
  .subscribe-form { flex-direction: column; }
  .brief-subscribe { flex-direction: column; align-items: flex-start; }
  .brief-finding { grid-template-columns: 1.75rem 1fr; }
  .action-instruction { font-size: 0.78rem; }
}