body {
  font-family: 'Inter', 'Lato', Arial, sans-serif;
  margin: 0; padding: 0;
  background: #eaf2ff;
  color: #243c61;
}

/* HEADER */
.gw-header {
  background: #223c66;
  color: #fff;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(34,60,102,0.12);
}
.gw-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px 14px 14px;
}
.gw-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.gw-logo {
  height: 38px;
  margin-right: 12px;
}
.gw-site-title {
  font-size: 1.37rem;
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.01em;
}
.gw-nav {
  display: flex;
  gap: 20px;
}
.gw-nav-link {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 6px 14px;
  border-radius: 8px;
  transition: background 0.16s, color 0.16s;
}
.gw-nav-link.active, .gw-nav-link:hover, .gw-nav-link:focus {
  background: #ff8200;
  color: #fff;
  outline: none;
}

/* HERO */
.gw-hero {
  background: linear-gradient(110deg, #1a2945 0%, #2b4167 100%);
  color: #fff;
  text-align: center;
  padding: 54px 0 36px 0;
}
.gw-hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.gw-lead {
  font-size: 1.15rem;
  color: #ff8200;
  margin-bottom: 18px;
}
.gw-btn-main {
  display: inline-block;
  margin-top: 10px;
  background: linear-gradient(90deg, #4782ff 0%, #4ad2ff 100%);
  color: #fff;
  font-weight: 700;
  font-size: 1.04rem;
  padding: 12px 30px;
  border-radius: 16px;
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(71,130,255,0.13);
  transition: background 0.16s, box-shadow 0.16s, transform 0.16s;
}
.gw-btn-main:hover {
  background: linear-gradient(90deg, #4ad2ff 0%, #4782ff 100%);
  box-shadow: 0 6px 22px rgba(71,130,255,0.23);
  transform: scale(1.04);
}

/* ABOUT */
.gw-about {
  max-width: 720px;
  margin: 38px auto 0 auto;
  background: #f7faff;
  color: #213047;
  border-radius: 18px;
  box-shadow: 0 2px 12px rgba(38,86,173,0.07);
  padding: 34px 28px 20px 28px;
  text-align: center;
}
.gw-about h2 {
  color: #ff8200;
  font-size: 1.25rem;
  margin-bottom: 12px;
}

/* CATEGORIES */
.gw-categories {
  max-width: 1080px;
  margin: 48px auto 0 auto;
  padding: 0 18px;
}
.gw-categories h2 {
  text-align: center;
  color: #ff8200;
  margin-bottom: 28px;
  font-size: 1.2rem;
}
.gw-cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);

  gap: 28px;
}
.gw-cat-card {
  background: #fff;
  border-radius: 15px;
  box-shadow: 0 2px 14px rgba(38,86,173,0.07);
  padding: 30px 20px 22px 20px;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 240px;
}
.gw-cat-card h3 {
  color: #223c66;
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.gw-cat-card p {
  font-size: 1.01rem;
  color: #425a7c;
  margin-bottom: 18px;
}
.gw-btn-cat {
  margin-top: auto;
  background: linear-gradient(90deg, #ff8200 0%, #ffd580 100%);
  color: #243c61;
  font-weight: 700;
  font-size: 1rem;
  padding: 10px 22px;
  border-radius: 12px;
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(255,130,0,0.11);
  transition: background 0.16s, box-shadow 0.16s, transform 0.16s;
}
.gw-btn-cat:hover {
  background: linear-gradient(90deg, #ffd580 0%, #ff8200 100%);
  color: #fff;
  transform: scale(1.03);
}

/* CTA */
.gw-cta {
  max-width: 720px;
  margin: 50px auto 34px auto;
  background: #eaf2ff;
  color: #233450;
  border-radius: 16px;
  box-shadow: 0 2px 10px rgba(38,86,173,0.07);
  padding: 32px 28px 18px 28px;
  text-align: center;
}
.gw-cta h2 {
  color: #ff8200;
  font-size: 1.14rem;
  margin-bottom: 13px;
}
.gw-btn-cta {
  display: inline-block;
  margin-top: 10px;
  background: #4782ff;
  color: #fff;
  font-weight: 700;
  font-size: 1.01rem;
  padding: 11px 28px;
  border-radius: 12px;
  text-decoration: none;
  transition: background 0.14s, box-shadow 0.14s, transform 0.14s;
  box-shadow: 0 2px 8px rgba(71,130,255,0.12);
}
.gw-btn-cta:hover {
  background: #ff8200;
  color: #fff;
  transform: scale(1.03);
}
/* RESPONSIVE */
@media (max-width: 900px) {
  .gw-cat-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 600px) {
  .gw-header-inner, .gw-footer-inner { padding: 0 2vw; }
  .gw-hero h1 { font-size: 1.17rem; }
  .gw-about, .gw-cta { padding: 14px 4vw; }
  .gw-header-inner { flex-direction: column; gap: 6px; }
  .gw-nav { flex-direction: column; gap: 10px; }
  .gw-cat-card { min-height: 180px; }
}

/* universal footer */
.footer {
  background: #192c45;
  padding: 36px 0 18px 0;
  color: #fff;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
  margin-bottom: 12px;
}
.footer-links a {
  color: #f8ad3f;
  text-decoration: none;
  font-size: 1.03rem;
  font-weight: 500;
  transition: color .16s;
}
.footer-links a:hover,
.footer-links a:focus {
  color: #fff;
}
.footer-center {
  text-align: center;
  width: 100%;
  color: #fff;
  font-size: 1.05rem;
  opacity: 0.85;
}

.gw-contact-main {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
  padding: 28px 8px;
  background: #172139;
}
.gw-contact-card {
  background: #202e4a;
  color: #fff;
  border-radius: 18px;
  box-shadow: 0 6px 24px rgba(24,36,70,0.16);
  max-width: 440px;
  width: 100%;
  padding: 36px 28px 28px 28px;
  text-align: center;
}
.gw-contact-card h1 {
  color: #ff9000;
  font-size: 2rem;
  margin-bottom: 14px;
}
.gw-contact-card a {
  color: #61d2ff;
  text-decoration: underline;
}
.gw-contact-info {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 28px 0 0 0;
  font-size: 1.07rem;
}
.gw-contact-info strong {
  color: #f8ad3f;
}
@media (max-width: 600px) {
  .gw-contact-card {
    padding: 20px 7px 16px 7px;
  }
}

*/ topics */
.gw-topics-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 0 48px 0;
}

.gw-topics-hero {
  text-align: center;
  margin-bottom: 32px;
}
.gw-topics-hero h1 {
  font-size: 2.2rem;
  color: #ff9000;
  margin-bottom: 12px;
}
.gw-topics-lead {
  color: #ff9000f;
  font-size: 1.18rem;
  max-width: 670px;
  margin: 0 auto;
  opacity: 0.85;
}

.gw-topics-list {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: center;
  margin-top: 24px;
}

.gw-topic-card {
  background: #202e4a;
  color: #fff;
  border-radius: 15px;
  box-shadow: 0 3px 12px rgba(24,36,70,0.10);
  padding: 32px 22px 26px 22px;
  flex: 1 1 290px;
  min-width: 265px;
  max-width: 340px;
  margin: 0 0 14px 0;
  text-decoration: none;
  transition: transform 0.18s cubic-bezier(.4,0,.2,1), box-shadow 0.18s;
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.gw-topic-card:hover,
.gw-topic-card:focus {
  transform: translateY(-5px) scale(1.03);
  box-shadow: 0 12px 32px rgba(255,144,0,0.13);
  border-color: #ff9000;
  color: #fff;
}
.gw-topic-card h2 {
  font-size: 1.27rem;
  margin-bottom: 9px;
  color: #ff9000;
}
.gw-topic-card p {
  color: #e5eefc;
  font-size: 1.05rem;
  margin-bottom: 0;
  opacity: 0.93;
}

@media (max-width: 850px) {
  .gw-topics-list {
    flex-direction: column;
    align-items: center;
    gap: 18px;
  }
  .gw-topic-card {
    max-width: 98vw;
    width: 100%;
    margin: 0;
  }
}

/* Sidebar base styling */
.gw-sidebar {
  width: 260px;
  background: #17223b;
  border-radius: 16px;
  box-shadow: 0 4px 18px rgba(23,34,59,0.08);
  padding: 28px 20px 22px 20px;
  color: #fff;
  font-family: 'Inter', Arial, sans-serif;
  margin-bottom: 32px;
}

/* Sidebar nav */
.sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0 0 28px 0;
}

.sidebar-nav li {
  margin-bottom: 18px;
}

.sidebar-nav .sidebar-section span {
  color: #FFA420;
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 12px;
  display: block;
  letter-spacing: 0.5px;
}

.sidebar-nav a {
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  font-size: 1.07rem;
  transition: color 0.18s;
}

.sidebar-nav a:hover {
  color: #FFA420;
}

.sidebar-nav i {
  display: inline-block;
  width: 1.2em;
  text-align: center;
  margin-right: 0.7em;
  font-style: normal;
}

/* Pw7 Pulse Highlight */
.sidebar-highlight.pulse {
  background: #212e4b;
  border-radius: 12px;
  padding: 14px 14px 12px 14px;
  box-shadow: 0 2px 7px rgba(23,34,59,0.10);
}

.sidebar-highlight.pulse h4 {
  color: #FFA420;
  font-size: 1.03rem;
  margin-bottom: 6px;
  letter-spacing: 0.2px;
}

.pulse-content {
  color: #c6e0ff;
  font-size: 0.98rem;
}

/* Responsive for mobile */
@media (max-width: 800px) {
  .gw-sidebar {
    width: 100%;
    margin-bottom: 18px;
    padding: 18px 7vw 16px 7vw;
  }
}

.gw-layout {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto;
  gap: 38px;
  padding-top: 22px;
}
.gw-main-content {
  flex: 1 1 0;
  min-width: 0;
}
/* Sidebar is already styled for fixed width in previous CSS */
@media (max-width: 900px) {
  .gw-layout {
    flex-direction: column;
    gap: 0;
  }
  .gw-sidebar {
    order: 2;
    margin: 0 auto 18px auto;
    width: 100%;
  }
  .gw-main-content {
    order: 1;
  }
}

.gw-bullet-list {
  margin: 18px 0 22px 0;
  padding-left: 1.5em;
  list-style: none;
}

.gw-bullet-list li {
  position: relative;
  color: #213047;         /* Soft blue/white for dark backgrounds */
  font-size: 1.11rem;
  line-height: 1.7;
  margin-bottom: 12px;
  padding-left: 20px;
}

.gw-bullet-list li::before {
  content: "•";
  color: #ff9000;          /* Pw7 orange bullet */
  font-size: 1.3em;
  position: absolute;
  left: 0;
  top: 0.08em;
}

.gw-bullet-list {
  text-align: left;
  /* ...other styles as before... */
}

/* 3 columns on desktop */
.gw-cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* 2 columns on tablets */
@media (max-width: 950px) {
  .gw-cat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 1 column on small screens */
@media (max-width: 650px) {
  .gw-cat-grid {
    grid-template-columns: 1fr;
  }
}

.gw-cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 950px) {
  .gw-cat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 650px) {
  .gw-cat-grid {
    grid-template-columns: 1fr;
  }
}

/* Behavior Science Society */
.behavioral-hero {
  background: linear-gradient(100deg, #d3e0f9 0%, #fffbe7 100%);
  padding: 54px 18px 32px 18px;
  text-align: center;
  border-radius: 18px;
  margin-bottom: 30px;
}

.gw-topic-intro {
  background: #fff;
  border-radius: 14px;
  padding: 32px 26px 22px 26px;
  box-shadow: 0 3px 18px rgba(38,86,173,0.08);
  margin-bottom: 32px;
}

.gw-bullet-list {
  margin: 18px 0 0 0;
  padding-left: 22px;
  color: #324a7a;
}
.gw-bullet-list li {
  margin-bottom: 9px;
  font-size: 1.07rem;
}

.gw-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 26px;
  margin-bottom: 28px;
}
.gw-feature-card {
  background: #f7faff;
  border-radius: 11px;
  box-shadow: 0 1px 8px rgba(90,136,255,0.08);
  padding: 22px 18px 14px 18px;
}
.gw-feature-card h3 {
  margin-bottom: 10px;
  color: #223c66;
  font-size: 1.13rem;
}
.gw-feature-card p {
  color: #425a7c;
  font-size: 1.01rem;
}
.gw-feature-card a {
  color: #ff9000;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.15s;
}
.gw-feature-card a:hover { color: #fa4400; }

.gw-topic-cta {
  text-align: center;
  margin: 38px 0 0 0;
  padding-bottom: 20px;
}
.gw-topic-cta h2 {
  color: #ff9000;
  font-size: 1.25rem;
  margin-bottom: 10px;
}

/* --- ARTICLE STYLES FOR GRAVITY WELL --- */
.gw-main-content {
  max-width: 740px;
  margin: 44px auto 44px auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 14px rgba(38,86,173,0.07);
  padding: 38px 22px 34px 22px;
}
.gw-article-header h1 {
  color: #223c66;
  font-size: 2.1rem;
  margin-bottom: 9px;
}
.gw-article-subtitle {
  color: #ff8200;
  font-size: 1.17rem;
  font-weight: 500;
  margin-bottom: 30px;
}
.gw-lead {
  font-size: 1.22rem;
  color: #425a7c;
  margin-bottom: 20px;
}
.gw-article-section {
  margin-bottom: 32px;
}
.gw-article-section h3 {
  color: #223c66;
  margin-bottom: 8px;
  font-size: 1.11rem;
}
.gw-article-bullets,
.gw-article-list {
  margin: 10px 0 16px 0;
  padding-left: 22px;
  color: #223c66;
}
.gw-article-bullets li,
.gw-article-list li {
  margin-bottom: 10px;
  line-height: 1.65;
}
.gw-article-list li b {
  color: #ff8200;
}
.gw-article-section b {
  color: #223c66;
}
@media (max-width: 650px) {
  .gw-main-content {
    padding: 18px 4vw;
  }
  .gw-article-header h1 {
    font-size: 1.4rem;
  }
  .gw-article-subtitle {
    font-size: 1.07rem;
  }
}

/* --- ARTICLE STYLES FOR GRAVITY WELL --- */
.gw-main-content {
  max-width: 740px;
  margin: 44px auto 44px auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 14px rgba(38,86,173,0.07);
  padding: 38px 22px 34px 22px;
}
.gw-article-header h1 {
  color: #223c66;
  font-size: 2.1rem;
  margin-bottom: 9px;
}
.gw-article-subtitle {
  color: #ff8200;
  font-size: 1.17rem;
  font-weight: 500;
  margin-bottom: 30px;
}
.gw-lead {
  font-size: 1.22rem;
  color: #425a7c;
  margin-bottom: 20px;
}
.gw-article-section {
  margin-bottom: 32px;
}
.gw-article-section h3 {
  color: #223c66;
  margin-bottom: 8px;
  font-size: 1.11rem;
}
.gw-article-bullets,
.gw-article-list {
  margin: 10px 0 16px 0;
  padding-left: 22px;
  color: #223c66;
}
.gw-article-bullets li,
.gw-article-list li {
  margin-bottom: 10px;
  line-height: 1.65;
}
.gw-article-list li b {
  color: #ff8200;
}
.gw-article-section b {
  color: #223c66;
}
@media (max-width: 650px) {
  .gw-main-content {
    padding: 18px 4vw;
  }
  .gw-article-header h1 {
    font-size: 1.4rem;
  }
  .gw-article-subtitle {
    font-size: 1.07rem;
  }
}

a.active {
  color: #ff8200;
  font-weight: bold;
  text-decoration: underline;
}