:root {
  color-scheme: dark;
  --page-bg: #0b0d0d;
  --panel-bg: #0d1714;
  --panel-deep: #0a1110;
  --card-bg: rgba(18, 28, 25, 0.96);
  --line: rgba(190, 219, 210, 0.24);
  --line-strong: rgba(85, 255, 210, 0.4);
  --text: #f5f7f4;
  --muted: #a9b4ae;
  --subtle: #6f7c76;
  --cyan: #42f3f0;
  --mint: #00f0a8;
  --green: #26e58a;
  --amber: #d6e15f;
  --orange: #ff8956;
  --violet: #a786ff;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--page-bg);
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  margin: 0;
  background:
    linear-gradient(90deg, transparent 0 11.7%, rgba(255, 255, 255, 0.16) 11.8% 11.86%, transparent 11.95% 100%),
    linear-gradient(180deg, transparent 0 27.5%, rgba(255, 255, 255, 0.16) 27.58% 27.64%, transparent 27.72% 100%),
    #0b0d0d;
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

.ai-security-page {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 4rem);
}

/* Ambient frame: background geometry outside the standalone page shell. */
.ambient-frame {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ambient-frame__line {
  position: absolute;
  display: block;
  background: rgba(255, 255, 255, 0.28);
}

.ambient-frame__line--top {
  top: 0;
  left: 60%;
  width: 1px;
  height: 22rem;
  transform: rotate(15deg);
  transform-origin: top;
}

.ambient-frame__line--middle,
.ambient-frame__line--bottom {
  left: 0;
  width: 100%;
  height: 1px;
}

.ambient-frame__line--middle {
  top: 27%;
}

.ambient-frame__line--bottom {
  bottom: 18%;
}

/* Showcase shell: creates the large rounded display seen in the reference image. */
.showcase {
  position: relative;
  z-index: 1;
  width: min(96rem, 100%);
  margin: 0 auto;
  padding-top: 3rem;
}

.device-frame {
  position: relative;
  margin: 4.5rem auto 0;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 4rem;
  padding: 0.45rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0.05));
  box-shadow:
    inset 0 0 0 0.18rem #111,
    var(--shadow);
}

.device-frame__notch {
  position: absolute;
  top: -0.7rem;
  height: 0.32rem;
  border-radius: 999px 999px 0 0;
  background: #2a2f2d;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.device-frame__notch--one {
  left: 8rem;
  width: 3.9rem;
}

.device-frame__notch--two {
  left: 12.4rem;
  width: 3.6rem;
}

.resource-app {
  position: relative;
  overflow: hidden;
  border-radius: 3.35rem;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 74% 24%, rgba(0, 240, 168, 0.28), transparent 32rem),
    radial-gradient(circle at 70% 35%, rgba(66, 243, 240, 0.18), transparent 40rem),
    linear-gradient(140deg, #0b1512 0%, #0a1210 52%, #10291f 100%);
  background-size: 8rem 8rem, 8rem 8rem, auto, auto, auto;
}

.resource-app::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(115deg, transparent 58%, rgba(66, 243, 240, 0.32) 58.12%, transparent 58.5%),
    linear-gradient(105deg, transparent 72%, rgba(66, 243, 240, 0.2) 72.12%, transparent 72.5%);
  pointer-events: none;
}

.resource-app::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 0.45rem 0.45rem;
  opacity: 0.08;
  pointer-events: none;
}

.topbar,
.hero,
.content-layout,
.site-footer {
  position: relative;
  z-index: 1;
}

.home-brand {
  position: absolute;
  top: 0;
  left: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  font-size: clamp(1.1rem, 2vw, 1.55rem);
  font-weight: 900;
  text-decoration: none;
}

.home-brand svg,
.social-links svg {
  display: block;
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.home-brand:hover,
.home-brand:focus-visible {
  color: var(--cyan);
  outline: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: clamp(1rem, 2vw, 1.5rem) 0 clamp(2.5rem, 4vw, 4rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 900;
  text-decoration: none;
}

.brand__mark {
  display: inline-block;
  width: 0.82rem;
  height: 0.82rem;
  border-radius: 999px;
  background:
    radial-gradient(circle at 68% 50%, var(--mint) 0 28%, transparent 30%),
    conic-gradient(from 90deg, var(--cyan), var(--mint), transparent 64%);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: rgba(7, 13, 12, 0.48);
  backdrop-filter: blur(12px);
}

.topnav a {
  border-right: 1px solid var(--line);
  padding: 0.82rem 1.08rem;
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
}

.topnav a:last-child {
  border-right: 0;
}

.topnav a:hover,
.topnav a:focus-visible {
  background: rgba(66, 243, 240, 0.12);
  color: var(--cyan);
  outline: none;
}

/* Hero section: oversized title, compact subtitle, and green accent word. */
.hero {
  max-width: 56rem;
  padding: clamp(4.5rem, 8vw, 7rem) 0 clamp(2.2rem, 4vw, 3.5rem);
}

.hero h1 {
  max-width: 12ch;
  margin: 0 0 1.2rem;
  font-size: clamp(3.2rem, 7vw, 6.5rem);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 0.98;
}

.hero h1 span {
  color: var(--mint);
}

.hero__subtitle {
  max-width: 48rem;
  margin: 0;
  color: #d5ddd8;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.content-layout {
  position: relative;
  z-index: 1;
  margin-top: 0;
}

.resource-library {
  min-width: 0;
}

.section-block {
  scroll-margin-top: 2rem;
}

.section-block + .section-block {
  margin-top: clamp(2.4rem, 4vw, 4rem);
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  padding: 1.15rem 1.1rem;
  background: rgba(9, 18, 16, 0.66);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.65rem);
  line-height: 1.1;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-right: 1px solid var(--line);
}

.resource-card {
  position: relative;
  display: grid;
  min-height: 0;
  align-content: start;
  grid-template-rows: auto 1fr auto;
  gap: 0.75rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  padding: 1.05rem 1.1rem 1.1rem;
  background: var(--card-bg);
  color: var(--text);
  text-decoration: none;
  transition:
    background 220ms ease,
    box-shadow 220ms ease,
    transform 220ms ease;
}

.resource-card:hover {
  z-index: 2;
  background: rgba(18, 33, 29, 0.98);
  box-shadow: 0 1.2rem 3rem rgba(0, 240, 168, 0.08);
  transform: translateY(-0.25rem);
}

.resource-card:focus-visible {
  z-index: 3;
  outline: 2px solid var(--mint);
  outline-offset: -2px;
}

.resource-card::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(145deg, rgba(66, 243, 240, 0.08), transparent 42%);
  opacity: 0;
  transition: opacity 220ms ease;
}

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

.resource-card__tags {
  position: relative;
  z-index: 1;
  order: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-self: end;
  margin-top: 0.15rem;
}

.resource-card__tags span {
  border-radius: 0.32rem;
  padding: 0.34rem 0.45rem;
  background: rgba(255, 255, 255, 0.07);
  color: #c5ccc8;
  font-size: 0.63rem;
  font-weight: 800;
  text-transform: uppercase;
}

.resource-card__tags span:nth-child(2) {
  background: rgba(255, 255, 255, 0.07);
  color: #c5ccc8;
}

.resource-card h3,
.resource-card p {
  position: relative;
  z-index: 1;
}

.resource-card h3 {
  order: 1;
  margin: 0;
  font-size: clamp(0.98rem, 1.25vw, 1.12rem);
  font-weight: 500;
  line-height: 1.28;
}

.resource-card p {
  order: 2;
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  padding-top: 1.35rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
  font-size: 0.92rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.social-links a {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: rgba(7, 13, 12, 0.5);
  color: var(--text);
  text-decoration: none;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.social-links a:hover,
.social-links a:focus-visible {
  border-color: var(--line-strong);
  background: rgba(0, 240, 168, 0.1);
  color: var(--cyan);
  outline: none;
  transform: translateY(-0.12rem);
}

@media (max-width: 1060px) {
  .device-frame {
    margin-top: 1rem;
    border-radius: 2.5rem;
  }

  .resource-app {
    border-radius: 2rem;
  }

  .content-layout {
    margin-top: 0;
  }

  .resource-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .ai-security-page {
    padding: 0.75rem;
  }

  body {
    background: #0b0d0d;
  }

  .ambient-frame {
    display: none;
  }

  .device-frame {
    margin-top: 3.6rem;
    border-radius: 1.6rem;
    padding: 0.25rem;
  }

  .device-frame__notch {
    display: none;
  }

  .resource-app {
    border-radius: 1.25rem;
    padding: 1rem;
  }

  .topbar {
    align-items: stretch;
  }

  .topnav {
    width: 100%;
  }

  .topnav a {
    flex: 1 1 50%;
    border-bottom: 1px solid var(--line);
    text-align: center;
  }

  .hero {
    padding: 3.2rem 0 2.2rem;
  }

  .hero h1 {
    font-size: clamp(3rem, 16vw, 4.2rem);
  }

  .section-heading {
    align-items: flex-start;
  }

  .resource-grid {
    grid-template-columns: 1fr;
  }

  .resource-card {
    min-height: 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}