/* Section: Palette & Foundations */
:root {
  --bg: #052a1b;            /* deep pewter-green baseline */
  --bg-2: #0a3b2b;          /* secondary layer for depth */
  --text: #eafff0;           /* high-contrast on dark glass */
  --muted: #b9d6c0;          /* readable body copy on glass */
  --accent: #39ff7a;           /* bright cyber-green */
  --accent-2: #a6f6c1;         /* focus/line accent */
  --glass: rgba(18, 26, 22, 0.72);
  --glass-border: rgba(140, 210, 170, 0.4);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  --card-glow: 0 0 22px rgba(57, 255, 122, 0.25);
  --focus-ring: 2px solid var(--accent);
}

/* Section: Global & Utilities */
* { box-sizing: border-box; }
html, body { height: 100%; }
html { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; font-size: 16px; }
body {
  margin: 0;
  color: var(--text);
  background: 
    radial-gradient(circle at 15% 20%, rgba(57,255,122,.20) 0 8%, transparent 9%),
    radial-gradient(circle at 85% 40%, rgba(0,255,120,.16) 0 12%, transparent 13%),
    linear-gradient(135deg, #041b12 0%, #062c1a 60%, #04140d 100%);
  background-attachment: fixed;
  position: relative;
  overflow-x: hidden;
}
body::after {
  content:"";
  position: fixed; inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,.04) 0 1px,
    transparent 1px 2px
  );
  mix-blend-mode: overlay;
  opacity: .25;
  pointer-events: none;
  z-index: 0;
}
* { outline: none; }
:focus { outline: none; }
:focus-visible { outline: var(--focus-ring); outline-offset: 2px; border-radius: 4px; }

/* Section: Layout primitives */
.container { width: 100%; max-width: clamp(640px, 86vw, 1100px); margin-inline: auto; padding-inline: 1rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: rgba(10, 15, 12, 0.65); border: 1px solid rgba(180,210,180,.35);
  border-radius: 12px; padding: 1rem; box-shadow: var(--shadow);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  animation: fadeInUp .5s ease forwards;
  opacity: 0; transform: translateY(6px);
}
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
  .card { animation: none; opacity: 1; transform: none; }
}

/* Section: Glass panels & components */
header, nav, main, article, footer, aside { border-radius: 14px; }
/* Glassy surfaces with graceful fallbacks */
header, nav {
  background: rgba(8, 15, 12, 0.72);
  border: 1px solid rgba(140, 210, 170, 0.4);
  padding: 1rem 1rem;
  margin: 1rem auto;
  width: min(1100px, 92vw);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}
header { text-align: center; }
header h1 { font-size: clamp(1.75rem, 1.6rem + 2.4vw, 3rem); line-height: 1.15; margin: .25rem 0 .25rem; color: var(--text); }
header .meta { color: var(--muted); font-size: 0.92rem; margin: 0; }

/* Subtle content area */
main { padding: 1rem 0; }
article { padding: 0 0 1rem; }

/* Image framing */
.image-frame, .featured-image { display: block; width: 100%; overflow: hidden; border-radius: 12px; border: 1px solid rgba(180,210,180,.35); box-shadow: 0 6px 18px rgba(0,0,0,.25); }
.image-frame { aspect-ratio: 16 / 9; }
.image-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Content area defaults */
.content { max-width: 720px; margin: 0 auto; padding: 0 1rem; color: var(--muted); }

/* Typography helpers */
h2 { font-size: clamp(1.25rem, 0.9rem + 2vw, 1.75rem); color: var(--text); margin: 1rem 0 .5rem; line-height: 1.25; }
p { font-size: clamp(1rem, 0.8vw + 0.9rem, 1.125rem); line-height: 1.6; color: var(--muted); margin: 0 0 1rem; }
ol, ul { margin: 0 0 1rem 1.25rem; padding: 0; color: var(--muted); }
li { margin: .25rem 0; }

/* Links & buttons (accessibility: focus-visible) */
a, button, .btn, .cta {
  font-family: inherit; font-weight: 600; text-decoration: none;
  transition: transform .15s ease, background-color .2s ease, color .2s ease;
}
a { color: var(--accent); }
a:hover { text-decoration: underline; }
a:focus-visible { outline: var(--focus-ring); outline-offset: 2px; text-decoration: underline; }

.btn, .cta, a.btn, a.cta {
  display: inline-block; padding: .6rem 1rem; border-radius: 8px;
  border: 1px solid rgba(0,0,0,.15); background: var(--accent);
  color: #06290e; cursor: pointer;
}
.btn:hover, .cta:hover, a.btn:hover, a.cta:hover { background: #2df07a; transform: translateY(-1px); }
.btn-outline, .cta-outline {
  background: transparent; color: var(--accent); border: 1px solid rgba(57,255,122,.7);
}
.btn-outline:hover { background: rgba(57,255,122,.08); }

/* Utility: image frame helpers (if used in content) */
.utility { display: inline-flex; gap: .5rem; align-items: center; }

/* List styling tweaks for accessibility on glass backgrounds */
ul, ol { list-style-position: inside; }

/* Section: Print styles (basic readability) */
@media print {
  body { background: white; color: black; }
  header, nav, footer { background: transparent; border: none; box-shadow: none; }
  .card { background: #fff; border: 1px solid #ccc; }
}
 
/* Section: Keyboard focus hints for links on non-visible scenarios */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Section: Responsiveness helpers (mobile-first) */
@media (max-width: 680px) {
  header, nav { padding: 0.75rem; }
  .container { padding-inline: .75rem; }
  .grid { grid-template-columns: 1fr; }
}