@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400&family=Instrument+Serif:ital@0;1&display=swap");

:root {
  --teal: #14b8a6;
  --teal-deep: #0d9488;
  --teal-light: #5eead4;
  --teal-glow: rgba(20, 184, 166, 0.45);
  --teal-soft: rgba(20, 184, 166, 0.12);
  --teal-muted: rgba(20, 184, 166, 0.08);
  --ink: #0b1220;
  --ink-soft: #111827;
  --text: #1e293b;
  --muted: #64748b;
  --border: rgba(148, 163, 184, 0.22);
  --border-strong: rgba(148, 163, 184, 0.35);
  --white: #ffffff;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --surface-elevated: rgba(255, 255, 255, 0.92);
  --shadow-sm: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 28px 80px rgba(15, 23, 42, 0.12);
  --shadow-teal: 0 18px 45px rgba(20, 184, 166, 0.22);
  --radius: 22px;
  --radius-sm: 16px;
  --radius-xs: 12px;
  --max: 1180px;
  --font: "DM Sans", "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --header-height: 78px;
  --gradient-brand: linear-gradient(135deg, #14b8a6 0%, #0d9488 48%, #0f766e 100%);
  --gradient-mesh: radial-gradient(circle at 12% 18%, rgba(20, 184, 166, 0.16), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(94, 234, 212, 0.14), transparent 24%),
    radial-gradient(circle at 70% 82%, rgba(13, 148, 136, 0.1), transparent 30%),
    linear-gradient(180deg, #f8fafc 0%, #f1f5f9 48%, #eef2ff 100%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--gradient-mesh);
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black, transparent 88%);
}

body > * {
  position: relative;
  z-index: 1;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

/* Header — layout unchanged */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.28rem;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: var(--gradient-brand);
  display: grid;
  place-items: center;
  color: white;
  font-size: 0.88rem;
  font-weight: 900;
  box-shadow: var(--shadow-teal);
  position: relative;
  overflow: hidden;
}

.logo-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.35), transparent 55%);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a,
.nav-dropdown-toggle {
  position: relative;
  color: var(--text);
  font-weight: 600;
  font-size: 0.96rem;
  transition: color 0.2s ease;
}

.nav a::after,
.nav-dropdown-toggle::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 999px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.nav a:hover::after,
.nav a.active::after,
.nav-dropdown:hover .nav-dropdown-toggle::after,
.nav-dropdown.open .nav-dropdown-toggle::after {
  transform: scaleX(1);
}

.nav a:hover,
.nav a.active,
.nav-dropdown-toggle:hover {
  color: var(--teal-deep);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  border: 0;
  background: none;
  padding: 0;
}

.nav-dropdown-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.nav-dropdown.open .nav-dropdown-toggle svg {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 14px);
  right: 0;
  min-width: 230px;
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: 0.22s ease;
  backdrop-filter: blur(16px);
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu a {
  display: block;
  padding: 11px 14px;
  border-radius: 10px;
  font-weight: 600;
}

.nav-dropdown-menu a::after {
  display: none;
}

.nav-dropdown-menu a:hover {
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.12), rgba(94, 234, 212, 0.08));
  color: var(--teal-deep);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 999px;
  padding: 12px 24px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-teal {
  background: var(--gradient-brand);
  color: white;
  box-shadow: var(--shadow-teal);
}

.btn-teal:hover {
  box-shadow: 0 22px 50px rgba(20, 184, 166, 0.34);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  border-color: rgba(20, 184, 166, 0.45);
  color: var(--teal-deep);
  box-shadow: 0 16px 36px rgba(20, 184, 166, 0.12);
}

.btn-arrow::after {
  content: "→";
  transition: transform 0.2s ease;
}

.btn-arrow:hover::after {
  transform: translateX(3px);
}

/* Hero */
.hero {
  padding: 88px 0 56px;
  text-align: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 100%;
  margin: 0 auto;
  width: min(920px, 100%);
  background: radial-gradient(circle, rgba(20, 184, 166, 0.12), transparent 68%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  margin-bottom: 22px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(20, 184, 166, 0.18);
  color: var(--teal-deep);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: var(--shadow-sm);
}

.hero-eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 6px rgba(20, 184, 166, 0.14);
}

.hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  line-height: 1.02;
  font-weight: 400;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.hero h1 .accent,
.page-title .accent {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p,
.page-title p {
  max-width: 680px;
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.hero-stat {
  min-width: 150px;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.hero-stat strong {
  display: block;
  font-size: 1.35rem;
  color: var(--ink);
  line-height: 1.1;
}

.hero-stat span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
}

.page-title {
  padding: 72px 0 40px;
  text-align: center;
  position: relative;
}

.page-title::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(20, 184, 166, 0.1), transparent 62%);
  pointer-events: none;
}

.page-title h1 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.badge {
  display: inline-block;
  background: var(--gradient-brand);
  color: white;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-teal);
}

.section {
  padding: 56px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 36px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 620px;
  margin-inline: auto;
}

.section-divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  margin: 0 0 40px;
}

/* Cards */
.category-grid,
.topic-grid,
.article-grid,
.contact-cards {
  gap: 26px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.category-card,
.topic-card,
.subtopic-card,
.article-card,
.contact-card,
.login-card,
.content-box,
.sidebar-box {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.category-card {
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
}

.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.35), transparent 45%, rgba(94, 234, 212, 0.25));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(20, 184, 166, 0.28);
}

.category-card:hover::before {
  opacity: 1;
}

.category-card-art {
  aspect-ratio: 4/3;
  background:
    radial-gradient(circle at 20% 20%, rgba(20, 184, 166, 0.12), transparent 34%),
    linear-gradient(180deg, #f8fafc 0%, #ecfeff 100%);
  display: grid;
  place-items: center;
  padding: 24px;
}

.category-card-footer {
  margin-top: auto;
  background: var(--gradient-brand);
  color: white;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
}

.category-card-footer .circle-arrow {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.22);
  display: grid;
  place-items: center;
  transition: transform 0.2s ease;
}

.category-card:hover .circle-arrow {
  transform: translateX(3px);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.topic-card,
.subtopic-card {
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.topic-card:hover,
.subtopic-card:hover,
.article-card:hover,
.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.topic-card-body {
  padding: 20px 20px 14px;
  min-height: 220px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: start;
}

.topic-card-title {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.topic-card-title .first {
  color: var(--teal-deep);
}

.subtopic-card .topic-card-body {
  grid-template-columns: 1fr;
  min-height: 180px;
}

.topic-card-footer,
.subtopic-card-footer {
  background: var(--gradient-brand);
  color: white;
  padding: 15px 18px;
  font-weight: 700;
  font-size: 0.95rem;
}

.subtopic-card .topic-card-desc {
  padding: 0 18px 14px;
  margin: 0;
  background: rgba(248, 250, 252, 0.95);
  border-top: 1px solid var(--border);
}

.topic-card-art {
  display: grid;
  place-items: center;
}

.invest-card-art {
  aspect-ratio: 16/10;
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.18), transparent 30%),
    var(--gradient-brand);
  display: grid;
  place-items: center;
  padding: 20px;
}

.invest-card-label {
  padding: 16px 18px;
  font-weight: 700;
  color: var(--ink);
  background: rgba(248, 250, 252, 0.9);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.article-card {
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  text-decoration: none;
  color: inherit;
  display: block;
}

.article-thumb {
  aspect-ratio: 16/11;
  background:
    radial-gradient(circle at 30% 30%, rgba(20, 184, 166, 0.18), transparent 40%),
    linear-gradient(135deg, #ecfeff, #ccfbf1 55%, #f0fdfa);
  display: grid;
  place-items: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.article-thumb::after {
  content: "";
  position: absolute;
  inset: auto -20% -40% auto;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  filter: blur(8px);
}

.article-card h3 {
  margin: 0;
  padding: 18px 18px 20px;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.center-actions {
  text-align: center;
  margin-top: 36px;
}

/* CTA band */
.cta-band {
  position: relative;
  overflow: hidden;
  color: white;
  padding: 72px 24px;
  text-align: center;
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 255, 255, 0.12), transparent 28%),
    radial-gradient(circle at 85% 80%, rgba(94, 234, 212, 0.18), transparent 32%),
    var(--gradient-brand);
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  opacity: 0.35;
}

.cta-band-inner {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: calc(var(--radius) + 4px);
  padding: 48px 28px;
  max-width: 900px;
  margin: 0 auto;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.cta-band h2 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.cta-band .btn-outline {
  border-color: rgba(255, 255, 255, 0.75);
  background: rgba(255, 255, 255, 0.92);
}

/* Footer */
.site-footer {
  padding: 64px 0 28px;
  background:
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.12), transparent 34%),
    linear-gradient(180deg, #0b1220 0%, #111827 100%);
  color: #e2e8f0;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 36px;
}

.footer-brand .logo {
  color: #f8fafc;
}

.footer-brand p,
.footer-note {
  color: #94a3b8;
}

.footer-heading {
  color: var(--teal-light);
  font-weight: 800;
  margin: 0 0 16px;
  letter-spacing: 0.02em;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
}

.footer-links a {
  color: #cbd5e1;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--teal-light);
}

.social-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.social-row a {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(20, 184, 166, 0.35);
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--teal-light);
  font-size: 0.75rem;
  font-weight: 800;
  background: rgba(20, 184, 166, 0.08);
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-row a:hover {
  transform: translateY(-2px);
  background: rgba(20, 184, 166, 0.16);
}

.subscribe-form {
  display: flex;
  gap: 8px;
  margin: 14px 0 10px;
}

.subscribe-form input {
  flex: 1;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 12px;
  padding: 12px 14px;
  background: rgba(15, 23, 42, 0.55);
  color: #f8fafc;
}

.subscribe-form input::placeholder {
  color: #64748b;
}

.subscribe-form button {
  white-space: nowrap;
}

.footer-note a {
  color: var(--teal-light);
  font-weight: 600;
}

.copyright {
  text-align: center;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid rgba(148, 163, 184, 0.14);
  color: #64748b;
  font-size: 0.9rem;
}

/* Login */
.login-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 56px 0 28px;
}

.login-copy h1 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.login-card {
  border-radius: var(--radius);
  padding: 34px;
  backdrop-filter: blur(12px);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.form-group input,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.88);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(20, 184, 166, 0.55);
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.12);
}

.password-wrap {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: none;
  color: var(--teal-deep);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.82rem;
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 14px 0 20px;
  font-size: 0.92rem;
}

.form-row a {
  color: var(--teal-deep);
  font-weight: 700;
}

.login-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* FAQ */
.faq-section {
  padding: 56px 0 72px;
  text-align: center;
}

.faq-section h2 {
  font-family: var(--font-display);
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(2.2rem, 3vw, 3rem);
  margin: 0 0 10px;
}

.faq-list {
  max-width: 820px;
  margin: 28px auto 0;
  text-align: left;
}

.faq-item {
  border: 1px solid rgba(20, 184, 166, 0.22);
  border-radius: 999px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-radius 0.22s ease, box-shadow 0.22s ease;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(10px);
}

.faq-item.open {
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 17px 20px;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
  text-align: left;
}

.faq-item.open .faq-trigger {
  background: var(--gradient-brand);
  color: white;
}

.faq-icon {
  color: var(--teal-deep);
  font-weight: 900;
  width: 24px;
}

.faq-item.open .faq-icon {
  color: white;
}

.faq-panel {
  display: none;
  padding: 0 20px 18px;
  color: var(--muted);
}

.faq-item.open .faq-panel {
  display: block;
}

.faq-panel a {
  color: var(--teal-deep);
  font-weight: 700;
}

/* Contact */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 48px;
}

.contact-card {
  border-radius: var(--radius);
  padding: 34px 24px;
  text-align: center;
}

.contact-card-icon {
  width: 92px;
  height: 92px;
  margin: 0 auto 20px;
  border-radius: 24px;
  border: 1px solid rgba(20, 184, 166, 0.24);
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.1), rgba(94, 234, 212, 0.08));
  display: grid;
  place-items: center;
  color: var(--teal-deep);
  font-size: 1.8rem;
  box-shadow: var(--shadow-sm);
}

.contact-form-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: start;
  margin-bottom: 48px;
}

.contact-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-form-grid .full {
  grid-column: 1 / -1;
}

.required {
  color: #ef4444;
}

.form-submit-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.social-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.social-card {
  border: 1px solid rgba(20, 184, 166, 0.28);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  font-weight: 800;
  color: var(--teal-deep);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.social-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

/* Content page */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  padding: 40px 0 72px;
}

.content-main .tag {
  display: inline-block;
  background: var(--gradient-brand);
  color: white;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 7px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.content-main h1 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.breadcrumb {
  color: var(--teal-deep);
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.content-lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 720px;
  margin: 0 0 24px;
  line-height: 1.7;
}

.content-hero-art,
.topic-figure {
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.16), transparent 30%),
    var(--gradient-brand);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-teal);
}

.topic-figure {
  margin: 0 0 28px;
}

.topic-figure figcaption {
  margin-top: 12px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.78);
  text-align: center;
  font-weight: 600;
}

.content-box {
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  margin-bottom: 18px;
}

.content-box h2,
.content-section h2,
.scenario-box h2,
.key-points h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.content-box p,
.content-section p,
.scenario-box p {
  margin: 0;
  color: var(--text);
  line-height: 1.75;
}

.content-intro {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(236, 254, 255, 0.6));
}

.scenario-box {
  border: 1px solid rgba(20, 184, 166, 0.22);
  border-radius: var(--radius-sm);
  padding: 22px 24px;
  margin-bottom: 18px;
  background:
    linear-gradient(135deg, rgba(20, 184, 166, 0.08), rgba(255, 255, 255, 0.92));
  box-shadow: var(--shadow-sm);
}

.scenario-label {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--gradient-brand);
  color: white;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.key-points ul {
  margin: 0;
  padding-left: 20px;
}

.key-points li {
  margin-bottom: 10px;
  line-height: 1.65;
  color: var(--text);
}

.key-points li:last-child {
  margin-bottom: 0;
}

.study-steps ol {
  margin: 0;
  padding-left: 22px;
}

.study-steps li,
.common-mistakes li {
  margin-bottom: 12px;
  line-height: 1.7;
  color: var(--text);
}

.study-steps li:last-child,
.common-mistakes li:last-child {
  margin-bottom: 0;
}

.common-mistakes {
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.04), rgba(255, 255, 255, 0.95));
  border-color: rgba(244, 63, 94, 0.15);
}

.study-steps {
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.06), rgba(255, 255, 255, 0.95));
}

.content-section p + p {
  margin-top: 14px;
}

.content-intro p + p,
.scenario-box p + p,
.learning-tip p + p {
  margin-top: 14px;
}

.read-time {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal-deep);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.content-next {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 8px 0 18px;
}

.topic-card-desc,
.invest-card-desc {
  padding: 0 18px 16px;
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.learning-tip {
  border: 1px solid rgba(20, 184, 166, 0.28);
  border-radius: var(--radius-sm);
  padding: 20px 22px 20px 58px;
  position: relative;
  margin-bottom: 24px;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.08), rgba(255, 255, 255, 0.9));
}

.learning-tip::before {
  content: "◆";
  position: absolute;
  left: 22px;
  top: 20px;
  color: var(--teal-deep);
  font-size: 0.9rem;
}

.learning-tip h3 {
  margin: 0 0 8px;
  color: var(--teal-deep);
}

.content-sidebar .sidebar-box {
  border: 1px solid rgba(20, 184, 166, 0.24);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 18px;
  background: rgba(255, 255, 255, 0.88);
}

.sidebar-box .pro-tag {
  display: inline-block;
  background: var(--gradient-brand);
  color: white;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 5px 8px;
  border-radius: 8px;
  margin-bottom: 8px;
}

.related-topics h3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 14px;
}

.related-topics h3 a {
  color: var(--teal-deep);
  font-size: 0.85rem;
  font-weight: 700;
}

.related-card {
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 14px;
  border: 1px solid var(--border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.related-card-art {
  background: var(--gradient-brand);
  min-height: 100px;
  display: grid;
  place-items: center;
  padding: 16px;
}

.related-card-footer {
  background: var(--ink-soft);
  color: white;
  padding: 12px 14px;
  font-weight: 700;
  font-size: 0.92rem;
}

.disclaimer-banner {
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.1), rgba(255, 255, 255, 0.85));
  border: 1px solid rgba(20, 184, 166, 0.18);
  border-left: 4px solid var(--teal);
  padding: 14px 18px;
  margin: 0 0 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.back-link {
  color: var(--teal-deep);
  font-weight: 700;
}

.hidden {
  display: none !important;
}

/* Trading tracks hub */
.track-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 920px;
  margin: 0 auto;
}

.track-card {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.track-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.track-card-art {
  aspect-ratio: 16/10;
  background: linear-gradient(180deg, #f8fafc 0%, #ecfeff 100%);
  display: grid;
  place-items: center;
  padding: 24px;
}

.track-card-art-quant {
  background: linear-gradient(135deg, #0f766e 0%, #134e4a 55%, #042f2e 100%);
}

.track-card-body {
  padding: 22px 22px 16px;
  flex: 1;
}

.track-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-deep);
  margin-bottom: 8px;
}

.track-card-body h2 {
  margin: 0 0 10px;
  font-size: 1.45rem;
  color: var(--ink);
}

.track-card-body p {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.track-meta {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--teal-deep);
  background: var(--teal-soft);
  padding: 5px 10px;
  border-radius: 999px;
}

.track-card-footer {
  background: var(--gradient-brand);
  color: white;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
}

.coming-soon-panel {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
  text-align: center;
}

.coming-soon-panel h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--ink);
}

.coming-soon-panel > p {
  color: var(--muted);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto 18px;
}

.coming-soon-list {
  text-align: left;
  max-width: 420px;
  margin: 0 auto 20px;
  line-height: 1.7;
  color: var(--text);
}

.coming-soon-note a {
  color: var(--teal-deep);
  font-weight: 700;
}

.quant-toolbar-section {
  padding-top: 0;
}

.quant-intro-section {
  padding-top: 0;
  padding-bottom: 8px;
}

.quant-intro-box {
  max-width: 820px;
}

.quant-intro-box h2 {
  margin-top: 0;
  font-family: var(--font-display);
  color: var(--ink);
}

.quant-intro-box p {
  color: var(--text);
  line-height: 1.75;
  margin: 0 0 1.35em;
}

.quant-intro-box p:last-child {
  margin-bottom: 0;
}

.quant-section-group {
  margin-bottom: 36px;
}

.quant-section-group.hidden-card {
  display: none;
}

.quant-section-head {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.quant-section-heading {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--ink);
}

.quant-section-count {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--teal-deep);
  background: var(--teal-soft);
  padding: 4px 10px;
  border-radius: 999px;
  vertical-align: middle;
  margin-left: 8px;
}

.quant-section-intro {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  max-width: 720px;
}

.quant-toolbar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 18px;
}

.quant-search-wrap {
  display: block;
}

.quant-search {
  width: 100%;
  max-width: 420px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  background: var(--surface-solid);
  box-shadow: var(--shadow);
}

.quant-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.quant-filter {
  border: 1px solid var(--border);
  background: var(--surface-solid);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.quant-filter:hover,
.quant-filter.active {
  background: var(--gradient-brand);
  border-color: transparent;
  color: white;
}

.quant-results-meta {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.quant-topic-grid .quant-card.hidden-card {
  display: none;
}

.quant-ref {
  opacity: 0.75;
  font-size: 0.82em;
  margin-left: 6px;
}

.source-note {
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--muted);
  font-style: italic;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.related-card-art svg {
  width: 100%;
  height: 100%;
  min-height: 88px;
}

@media (max-width: 960px) {
  .category-grid,
  .topic-grid,
  .article-grid,
  .contact-cards,
  .footer-grid,
  .login-layout,
  .content-layout,
  .contact-form-section,
  .track-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
  }

  .header-inner {
    min-height: 68px;
  }

  .hero-stats {
    gap: 12px;
  }

  .hero-stat {
    min-width: 0;
    flex: 1 1 140px;
  }
}

.qshark-bridge-section {
  padding: 0 0 8px;
}

.qshark-bridge-card {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 40px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.14) 0%, rgba(13, 148, 136, 0.08) 55%, rgba(255, 255, 255, 0.92) 100%);
  border: 1px solid rgba(20, 184, 166, 0.28);
  box-shadow: var(--shadow-teal);
  text-align: center;
}

.qshark-bridge-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-deep);
  margin-bottom: 12px;
}

.qshark-bridge-card h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  color: var(--ink);
  font-weight: 400;
}

.qshark-bridge-card p {
  margin: 0 auto 24px;
  max-width: 52ch;
  color: var(--muted);
  font-size: 1.05rem;
}

@media (max-width: 640px) {
  .qshark-bridge-card {
    padding: 28px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}