/* ======================================================
   Nova Nuvem — Design System & Global Styles
   novanuvem.com
   ====================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700;14..32,800&display=swap');

/* ===================== TOKENS ===================== */
:root {
  /* Palette */
  --nn-bg:          #060914;
  --nn-bg-alt:      #0B1120;
  --nn-surface:     rgba(255, 255, 255, 0.030);
  --nn-surface-2:   rgba(255, 255, 255, 0.060);
  --nn-surface-3:   rgba(255, 255, 255, 0.090);
  --nn-border:      rgba(255, 255, 255, 0.070);
  --nn-border-2:    rgba(255, 255, 255, 0.130);

  /* Accent */
  --nn-accent:      #6366F1;
  --nn-accent-2:    #3B82F6;
  --nn-accent-glow: rgba(99, 102, 241, 0.18);
  --nn-grad:        linear-gradient(135deg, #6366F1 0%, #3B82F6 100%);
  --nn-grad-text:   linear-gradient(135deg, #818CF8 0%, #60A5FA 100%);

  /* Text */
  --nn-text:        #F1F5F9;
  --nn-text-2:      #94A3B8;
  --nn-text-3:      #64748B;

  /* Status */
  --nn-green:       #10B981;
  --nn-yellow:      #F59E0B;
  --nn-red:         #EF4444;

  /* Typography */
  --nn-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --sp-1:  4px;  --sp-2:  8px;  --sp-3:  12px;
  --sp-4:  16px; --sp-5:  20px; --sp-6:  24px;
  --sp-8:  32px; --sp-10: 40px; --sp-12: 48px;
  --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;

  /* Radii */
  --r-sm:   6px;  --r-md:   12px; --r-lg:   20px;
  --r-xl:   28px; --r-full: 9999px;

  /* Transitions */
  --t-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --t-normal: 280ms cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow:   500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,.45), 0 1px 2px rgba(0,0,0,.55);
  --shadow-md:   0 4px 16px rgba(0,0,0,.5);
  --shadow-glow: 0 0 40px rgba(99,102,241,.18), 0 0 80px rgba(59,130,246,.07);
  --shadow-card: 0 8px 32px rgba(0,0,0,.55);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--nn-font);
  background-color: var(--nn-bg);
  color: var(--nn-text);
  min-height: 100vh;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; border: none; outline: none; background: none; }
ul, ol { list-style: none; }

/* ================ BACKGROUND LAYERS ================ */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,.025) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  top: -25%;
  left: 50%;
  transform: translateX(-50%);
  width: 960px;
  height: 640px;
  background: radial-gradient(ellipse at center,
    rgba(99,102,241,.09) 0%,
    rgba(59,130,246,.04) 40%,
    transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* =================== HEADER =================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-6);
  background: rgba(6, 9, 20, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--nn-border);
  transition: background var(--t-normal);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-normal);
}
.header-brand.visible { opacity: 1; pointer-events: auto; }

.header-brand-text {
  font-size: 1rem;
  font-weight: 700;
  background: var(--nn-grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

/* Header on non-home pages */
.header-brand.always-visible { opacity: 1 !important; pointer-events: auto !important; }

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--nn-text-2);
  transition: color var(--t-fast);
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1.5px;
  background: var(--nn-grad);
  transition: width var(--t-fast);
}
.nav-link:hover { color: var(--nn-text); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: #A5B4FC; }
.nav-link.active::after { width: 100%; }

/* =================== HOME PAGE =================== */
.home-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--sp-24) var(--sp-4) var(--sp-16);
  z-index: 1;
  gap: var(--sp-6);
}

/* Logo area */
.home-logo-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  animation: fadeInDown 0.75s ease both;
}

.home-logo {
  width: 240px;
  height: auto;
  filter: drop-shadow(0 0 24px rgba(99,102,241,.35));
  transition: filter var(--t-normal);
}
.home-logo:hover { filter: drop-shadow(0 0 36px rgba(99,102,241,.55)); }

.home-tagline {
  font-size: 0.9375rem;
  color: var(--nn-text-3);
  font-weight: 400;
  letter-spacing: 0.025em;
  text-align: center;
}

/* Search area */
.home-search-section {
  width: 100%;
  max-width: 650px;
  animation: fadeInUp 0.75s ease 0.12s both;
}

.search-form { width: 100%; }

.search-bar {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--nn-surface-2);
  border: 1px solid var(--nn-border-2);
  border-radius: var(--r-full);
  padding: var(--sp-3) var(--sp-3) var(--sp-3) var(--sp-5);
  gap: var(--sp-3);
  transition: border-color var(--t-normal), box-shadow var(--t-normal), background var(--t-normal);
}
.search-bar:focus-within {
  border-color: rgba(99,102,241,.65);
  box-shadow: var(--shadow-glow);
  background: rgba(255,255,255,.05);
}

.search-icon {
  display: flex;
  align-items: center;
  color: var(--nn-text-3);
  flex-shrink: 0;
  transition: color var(--t-fast);
}
.search-bar:focus-within .search-icon { color: var(--nn-accent-2); }

.search-input {
  flex: 1;
  font-size: 1rem;
  color: var(--nn-text);
  background: transparent;
  caret-color: var(--nn-accent);
  min-width: 0;
}
.search-input::placeholder { color: var(--nn-text-3); }

.search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-2) var(--sp-5);
  background: var(--nn-grad);
  border-radius: var(--r-full);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.01em;
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.search-btn:hover { opacity: 0.88; transform: scale(1.02); }
.search-btn:active { transform: scale(0.98); }
.search-btn:disabled { opacity: 0.45; pointer-events: none; }

/* Loading dots */
.dot-pulse {
  display: none;
  align-items: center;
  gap: 5px;
  padding: var(--sp-2) var(--sp-4);
}
.dot-pulse.active { display: flex; }
.dot-pulse span {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--nn-accent);
  animation: dotPulse 1.35s infinite ease-in-out both;
}
.dot-pulse span:nth-child(1) { animation-delay: -0.30s; }
.dot-pulse span:nth-child(2) { animation-delay: -0.15s; }
.dot-pulse span:nth-child(3) { animation-delay: 0; }

/* ================ CHAT PANEL ================ */
.chat-panel {
  width: 100%;
  max-width: 650px;
  background: var(--nn-surface);
  border: 1px solid var(--nn-border);
  border-radius: var(--r-xl);
  overflow: hidden;
  animation: fadeInUp 0.4s ease both;
  display: none;
}
.chat-panel.visible { display: block; }

.chat-question {
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--nn-border);
}
.chat-question-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--nn-text-3);
  font-weight: 600;
  margin-bottom: var(--sp-1);
}
.chat-question-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--nn-text);
}

.chat-answer {
  padding: var(--sp-5) var(--sp-6);
}
.chat-answer-label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--nn-accent-2);
  font-weight: 600;
  margin-bottom: var(--sp-4);
}

.chat-answer-content {
  font-size: 0.9375rem;
  color: var(--nn-text-2);
  line-height: 1.82;
}
.chat-answer-content p { margin-bottom: var(--sp-3); }
.chat-answer-content p:last-child { margin-bottom: 0; }
.chat-answer-content strong { color: var(--nn-text); font-weight: 600; }
.chat-answer-content a {
  color: var(--nn-accent-2);
  text-decoration: underline;
  text-decoration-color: rgba(59,130,246,.35);
  text-underline-offset: 3px;
  transition: color var(--t-fast), text-decoration-color var(--t-fast);
}
.chat-answer-content a:hover {
  color: #93C5FD;
  text-decoration-color: rgba(59,130,246,.7);
}
.chat-answer-content hr {
  border: none;
  border-top: 1px solid var(--nn-border);
  margin: var(--sp-4) 0;
}

.chat-footer {
  padding: var(--sp-3) var(--sp-6);
  border-top: 1px solid var(--nn-border);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.btn-new-search {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-full);
  background: var(--nn-surface-2);
  border: 1px solid var(--nn-border-2);
  color: var(--nn-text-2);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
}
.btn-new-search:hover { color: var(--nn-text); border-color: rgba(255,255,255,.2); }

/* ================ BANNER ================ */
.home-banner {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 100%;
  margin-top: 6.5rem;
  margin-bottom: 1.5rem;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  animation: fadeInUp 0.75s ease 0.28s both;
}
.home-banner a {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
}
.home-banner img {
  border-radius: var(--r-sm);
  opacity: 0.88;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  transition: opacity var(--t-fast);
}
.home-banner:hover img { opacity: 1; }

/* =================== PAGE HEADER =================== */
.page-header {
  padding-top: calc(var(--sp-16) + 64px);
  padding-bottom: var(--sp-10);
  text-align: center;
  position: relative;
  z-index: 1;
  padding-left: var(--sp-4);
  padding-right: var(--sp-4);
}

.page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  background: var(--nn-grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--sp-3);
  line-height: 1.15;
}

.page-subtitle {
  font-size: 1.0625rem;
  color: var(--nn-text-3);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* =================== CATEGORY TABS =================== */
.category-tabs {
  display: flex;
  gap: var(--sp-2);
  overflow-x: auto;
  padding: 0 var(--sp-4) var(--sp-6);
  scrollbar-width: none;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
}
.category-tabs::-webkit-scrollbar { display: none; }

.cat-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-full);
  background: var(--nn-surface);
  border: 1px solid var(--nn-border);
  color: var(--nn-text-2);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
  user-select: none;
  transition: all var(--t-fast);
}
.cat-tab:hover { background: var(--nn-surface-2); color: var(--nn-text); border-color: var(--nn-border-2); }
.cat-tab.active {
  background: var(--nn-accent-glow);
  border-color: rgba(99,102,241,.4);
  color: #A5B4FC;
}

/* =================== ARTICLES GRID =================== */
.articles-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--sp-4) var(--sp-4) var(--sp-20);
  position: relative;
  z-index: 1;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(295px, 1fr));
  gap: var(--sp-4);
}

.article-card {
  background: var(--nn-surface);
  border: 1px solid var(--nn-border);
  border-radius: var(--r-md);
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  transition: all var(--t-normal);
  position: relative;
  overflow: hidden;
}
.article-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--nn-grad);
  opacity: 0;
  transition: opacity var(--t-normal);
}
.article-card:hover {
  background: var(--nn-surface-2);
  border-color: var(--nn-border-2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.article-card:hover::before { opacity: 1; }

.article-card-cat {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--nn-accent-2);
}

.article-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--nn-text);
  line-height: 1.45;
  flex: 1;
}

.article-card-arrow {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  color: var(--nn-text-3);
  transition: color var(--t-fast), transform var(--t-fast);
}
.article-card:hover .article-card-arrow { color: var(--nn-accent-2); transform: translateX(5px); }

.article-card-hidden { display: none; }

/* =================== ARTICLE PAGE =================== */
.article-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  padding: calc(var(--sp-16) + 64px) var(--sp-4) var(--sp-20);
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--sp-10);
  position: relative;
  z-index: 1;
  align-items: start;
}

.article-content { min-width: 0; }

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-6);
  font-size: 0.8125rem;
  color: var(--nn-text-3);
  flex-wrap: wrap;
}
.article-breadcrumb a { color: var(--nn-text-2); transition: color var(--t-fast); }
.article-breadcrumb a:hover { color: var(--nn-accent); }

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
}
.article-cat-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-1) var(--sp-3);
  background: var(--nn-accent-glow);
  border: 1px solid rgba(99,102,241,.3);
  border-radius: var(--r-full);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #A5B4FC;
}
.article-date { font-size: 0.8125rem; color: var(--nn-text-3); }

.article-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--nn-text);
  margin-bottom: var(--sp-6);
}

.article-intro {
  font-size: 1.125rem;
  color: var(--nn-text-2);
  line-height: 1.8;
  margin-bottom: var(--sp-8);
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid var(--nn-border);
}

/* Article body typography */
.article-body {
  color: var(--nn-text-2);
  font-size: 1rem;
  line-height: 1.82;
}
.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--nn-text);
  letter-spacing: -0.02em;
  margin: var(--sp-10) 0 var(--sp-4);
}
.article-body h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--nn-text);
  margin: var(--sp-8) 0 var(--sp-3);
}
.article-body p { margin-bottom: var(--sp-5); }
.article-body strong { color: var(--nn-text); font-weight: 600; }
.article-body ul, .article-body ol {
  padding-left: var(--sp-5);
  margin-bottom: var(--sp-5);
  list-style: disc;
}
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: var(--sp-2); }
.article-body a {
  color: var(--nn-accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(59,130,246,.35);
}
.article-body a:hover { color: #93C5FD; }
.article-body blockquote {
  border-left: 3px solid var(--nn-accent);
  padding-left: var(--sp-5);
  margin: var(--sp-6) 0;
  font-style: italic;
  color: var(--nn-text-3);
}

/* CTA block */
.article-cta {
  margin: var(--sp-8) 0;
  padding: var(--sp-6);
  background: linear-gradient(135deg, rgba(99,102,241,.08) 0%, rgba(59,130,246,.04) 100%);
  border: 1px solid rgba(99,102,241,.22);
  border-radius: var(--r-lg);
}
.article-cta h4 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--nn-text);
  margin-bottom: var(--sp-2);
}
.article-cta p {
  font-size: 0.9375rem;
  color: var(--nn-text-2);
  margin-bottom: var(--sp-4);
  line-height: 1.7;
}
.cta-link, .cta-button, .article-cta a, .sidebar-widget--cta a, .article-body a.cta-link, .article-body a.cta-button {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  text-align: center !important;
  gap: var(--sp-2) !important;
  padding: var(--sp-3) var(--sp-6) !important;
  background: linear-gradient(135deg, #6366F1 0%, #3B82F6 100%) !important;
  border-radius: var(--r-full) !important;
  color: #ffffff !important;
  -webkit-text-fill-color: #ffffff !important;
  -webkit-background-clip: border-box !important;
  background-clip: border-box !important;
  font-size: 0.9375rem !important;
  font-weight: 600 !important;
  line-height: 1.4 !important;
  white-space: normal !important;
  transition: opacity var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast) !important;
  text-decoration: none !important;
  opacity: 1 !important;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35) !important;
  margin-top: var(--sp-2) !important;
  border: none !important;
  position: relative !important;
}
.cta-link span, .cta-button span, .article-cta a span, .sidebar-widget--cta a span,
.article-body a.cta-link span, .article-body a.cta-button span {
  color: #ffffff !important;
  -webkit-text-fill-color: #ffffff !important;
  background: none !important;
  padding: 0 !important;
  box-shadow: none !important;
}
.cta-link img, .cta-button img, .article-cta a img, .sidebar-widget--cta a img,
.article-body a.cta-link img, .article-body a.cta-button img {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: 0 !important;
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  opacity: 0 !important;
  pointer-events: none !important;
  overflow: hidden !important;
}
.cta-link:hover, .cta-button:hover, .article-cta a:hover, .sidebar-widget--cta a:hover, .article-body a.cta-link:hover, .article-body a.cta-button:hover {
  opacity: 0.92 !important;
  transform: translateY(-2px) !important;
  color: #ffffff !important;
  -webkit-text-fill-color: #ffffff !important;
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5) !important;
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}
.sidebar-banner {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--nn-border);
  transition: border-color var(--t-fast);
}
.sidebar-banner:hover { border-color: var(--nn-border-2); }
.sidebar-banner img { width: 100%; height: auto; }
.sidebar-widget {
  background: var(--nn-surface);
  border: 1px solid var(--nn-border);
  border-radius: var(--r-md);
  padding: var(--sp-5);
}
.sidebar-widget h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--nn-text-3);
  margin-bottom: var(--sp-3);
}
.sidebar-widget p {
  font-size: 0.875rem;
  color: var(--nn-text-2);
  line-height: 1.7;
  margin: 0;
}

/* =================== INSTITUTIONAL =================== */
.institutional-wrapper {
  max-width: 760px;
  margin: 0 auto;
  padding: calc(var(--sp-16) + 64px) var(--sp-4) var(--sp-20);
  position: relative;
  z-index: 1;
}
.institutional-wrapper h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--nn-text);
  margin-bottom: var(--sp-2);
  line-height: 1.2;
}
.institutional-wrapper .last-updated {
  font-size: 0.875rem;
  color: var(--nn-text-3);
  margin-bottom: var(--sp-8);
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid var(--nn-border);
}
.institutional-wrapper h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nn-text);
  margin: var(--sp-8) 0 var(--sp-3);
}
.institutional-wrapper p {
  color: var(--nn-text-2);
  line-height: 1.8;
  margin-bottom: var(--sp-4);
}
.institutional-wrapper ul {
  list-style: disc;
  padding-left: var(--sp-5);
  margin-bottom: var(--sp-5);
}
.institutional-wrapper ul li {
  color: var(--nn-text-2);
  line-height: 1.8;
  margin-bottom: var(--sp-2);
}
.institutional-wrapper a { color: var(--nn-accent-2); text-decoration: underline; text-underline-offset: 3px; }

/* =================== CONTACT =================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  margin-top: var(--sp-8);
}
.contact-form { display: flex; flex-direction: column; gap: var(--sp-4); }
.form-group { display: flex; flex-direction: column; gap: var(--sp-2); }
.form-label { font-size: 0.875rem; font-weight: 500; color: var(--nn-text-2); }
.form-input, .form-textarea {
  padding: var(--sp-3) var(--sp-4);
  background: var(--nn-surface-2);
  border: 1px solid var(--nn-border);
  border-radius: var(--r-md);
  color: var(--nn-text);
  font-size: 0.9375rem;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--nn-text-3); }
.form-input:focus, .form-textarea:focus {
  border-color: rgba(99,102,241,.55);
  box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}
.form-textarea { resize: vertical; min-height: 130px; }
.btn-submit {
  padding: var(--sp-3) var(--sp-6);
  background: var(--nn-grad);
  border-radius: var(--r-full);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  align-self: flex-start;
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.btn-submit:hover { opacity: 0.88; transform: translateY(-1px); }

.contact-info { display: flex; flex-direction: column; gap: var(--sp-5); }
.contact-info-item { display: flex; align-items: flex-start; gap: var(--sp-3); }
.contact-info-icon {
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  background: var(--nn-accent-glow);
  border: 1px solid rgba(99,102,241,.3);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: #A5B4FC;
}
.contact-info-text h4 { font-size: 0.875rem; font-weight: 600; color: var(--nn-text); margin-bottom: var(--sp-1); }
.contact-info-text p  { font-size: 0.875rem; color: var(--nn-text-2); margin: 0; }

/* =================== FOOTER =================== */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--nn-border);
  padding: var(--sp-8) var(--sp-4);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
}
.footer-brand {
  font-size: 0.9375rem;
  font-weight: 700;
  background: var(--nn-grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}
.footer-links { display: flex; align-items: center; gap: var(--sp-5); flex-wrap: wrap; }
.footer-link { font-size: 0.8125rem; color: var(--nn-text-3); transition: color var(--t-fast); }
.footer-link:hover { color: var(--nn-text-2); }
.footer-copy {
  font-size: 0.8125rem !important;
  color: var(--nn-text-3) !important;
  width: 100%;
  text-align: center;
  margin-top: var(--sp-3);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--nn-border);
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
.footer-disclosure {
  font-size: 0.8125rem !important;
  color: var(--nn-text-3) !important;
  width: 100%;
  text-align: center;
  margin-top: 6px;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6 !important;
}

/* =================== 404 =================== */
.error-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: var(--sp-4);
  position: relative;
  z-index: 1;
}
.error-code {
  font-size: clamp(5rem, 18vw, 9rem);
  font-weight: 800;
  line-height: 1;
  background: var(--nn-grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.05em;
  margin-bottom: var(--sp-4);
}
.error-title { font-size: 1.5rem; font-weight: 700; color: var(--nn-text); margin-bottom: var(--sp-3); }
.error-subtitle { color: var(--nn-text-3); margin-bottom: var(--sp-8); max-width: 400px; line-height: 1.7; }

/* Generic button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  background: var(--nn-grad);
  border-radius: var(--r-full);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

/* =================== ANIMATIONS =================== */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes dotPulse {
  0%, 80%, 100% { transform: scale(0.4); opacity: 0.5; }
  40%            { transform: scale(1);   opacity: 1;   }
}
@keyframes blink {
  0%, 50%  { opacity: 1; }
  51%, 100% { opacity: 0; }
}
.typing-cursor::after { content: '▋'; animation: blink 1s infinite; color: var(--nn-accent); font-size: 0.8em; }

/* =================== UTILITIES =================== */
.hidden        { display: none !important; }
.sr-only       { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.text-gradient { background: var(--nn-grad-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.container     { max-width: 1100px; margin: 0 auto; padding: 0 var(--sp-4); }

/* =================== RESPONSIVE =================== */
@media (max-width: 860px) {
  .article-wrapper { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
}
@media (max-width: 640px) {
  .contact-grid { grid-template-columns: 1fr; }
  .home-logo { width: 190px; }
  .home-wrapper { padding: var(--sp-20) var(--sp-4) var(--sp-12); }
  .footer-inner { justify-content: center; text-align: center; }
  .footer-links { justify-content: center; }
  .home-banner img { width: 100%; max-width: 100%; }
}
@media (max-width: 400px) {
  .search-btn { padding: var(--sp-2) var(--sp-3); font-size: 0.8125rem; }
}