:root {
  --bg-page: #020617;
  --text-main: #f9fafb;
  --text-muted: #cbd5f5;
  --card-radius: 18px;
  --card-padding: 24px;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.45);

  --go-bg: #065f46;
  --go-accent: #bbf7d0;

  --aim-bg: #1d4ed8;
  --aim-accent: #bfdbfe;

  --iq-bg: #0369a1;
  --iq-accent: #bae6fd;

  --v5-bg: #7c2d12;
  --v5-accent: #fed7aa;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    sans-serif;
  background: radial-gradient(circle at top, #1f2937 0, #020617 50%, #020617);
  color: var(--text-main);
}

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

.container {
  width: min(1120px, 100% - 3rem);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.9),
    rgba(15, 23, 42, 0.75),
    transparent
  );
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.logo-mark {
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.9rem;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.main-nav a {
  position: relative;
  color: var(--text-muted);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #38bdf8, #a855f7);
  transition: width 180ms ease-out;
}

.main-nav a:hover::after {
  width: 100%;
}

.hero {
  padding: 3.5rem 0 2.5rem;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-text h1 {
  font-size: clamp(2.1rem, 3vw + 1rem, 3rem);
  margin-bottom: 0.8rem;
}

.hero-text p {
  max-width: 34rem;
  margin: 0 auto 1.5rem;
  color: var(--text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 120ms ease-out, box-shadow 120ms ease-out,
    background-color 120ms ease-out, border-color 120ms ease-out;
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8, #4f46e5);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(59, 130, 246, 0.55);
}

.btn-ghost {
  width: fit-content;
  margin-inline: auto;
  margin-top: 0.7rem;
  padding-inline: 1.4rem;
  border-color: rgba(241, 245, 249, 0.38);
  background: rgba(15, 23, 42, 0.18);
  color: #e5e7eb;
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.36);
  transform: translateY(-1px);
}

.product-section {
  padding: 1rem 0 3.5rem;
}

.section-title {
  text-align: center;
  margin-bottom: 1.8rem;
  font-size: 1.4rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.2rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: var(--card-padding);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-soft);
  background: #0b1220;
}

.product-header h3 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.grade-range {
  margin-top: 0.2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.product-media {
  margin: 1rem 0 0.6rem;
}

.image-placeholder {
  border-radius: 14px;
  height: 130px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(15, 23, 42, 0.86);
  background: linear-gradient(
    145deg,
    rgba(226, 232, 240, 0.95),
    rgba(203, 213, 225, 0.9)
  );
}

.feature-list {
  list-style: disc;
  padding-left: 1.1rem;
  margin: 0.9rem 0 0;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.feature-list li + li {
  margin-top: 0.35rem;
}

/* Individual card accents */

.product-go {
  background: radial-gradient(circle at top, #047857 0, #022c22 45%, #020617);
  border-top: 4px solid var(--go-accent);
}

.product-aim {
  background: radial-gradient(circle at top, #1d4ed8 0, #020617 52%, #020617);
  border-top: 4px solid var(--aim-accent);
}

.product-iq {
  background: radial-gradient(circle at top, #0284c7 0, #020617 52%, #020617);
  border-top: 4px solid var(--iq-accent);
}

.product-v5 {
  background: radial-gradient(circle at top, #b91c1c 0, #020617 52%, #020617);
  border-top: 4px solid var(--v5-accent);
}

.info-section {
  padding: 2.5rem 0 1.5rem;
}

.info-section h2 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.info-section p {
  margin: 0;
  max-width: 34rem;
  color: var(--text-muted);
}

.info-section-alt {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.2), #020617);
}

.site-footer {
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  margin-top: 1rem;
}

.footer-inner {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive */

@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 3rem;
  }

  .card-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .main-nav {
    display: none;
  }
}






.product-media {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px; /* Adjust this value based on your design */
  padding: 20px 10px;
}

.product-media img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}