/* ==========================================================================
   sandcassall.com — shared design system
   Deep-space sky, falling sand-stars, warm sandcastle accents.
   ========================================================================== */

:root {
  /* Sky — heritage gradient colors, deepened */
  --sky-top: #241645;
  --sky-bottom: #0e1a30;
  --ink-deep: #0a0e1c;

  /* Surfaces */
  --card: rgba(10, 16, 32, 0.55);
  --card-solid: #131a30;
  --card-hover: rgba(18, 26, 48, 0.72);
  --line: rgba(236, 234, 244, 0.10);
  --line-strong: rgba(236, 234, 244, 0.18);

  /* Text */
  --text: #eceaf4;
  --text-soft: rgba(236, 234, 244, 0.72);
  --text-faint: rgba(236, 234, 244, 0.50);

  /* Accents */
  --pink: #f2a0bd;            /* heritage pink, refined */
  --pink-deep: #e06a97;
  --sand: #e8b36a;            /* sandcastle gold */
  --sand-deep: #cf8f45;
  --teal: #7fd8c9;
  --gradient-dawn: linear-gradient(100deg, var(--sand) 0%, var(--pink) 55%, #8ad8f0 110%);

  /* Type */
  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--ink-deep);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* subtle nebula glows over the base gradient */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(ellipse 55% 45% at 80% 12%, rgba(242, 160, 189, 0.10) 0%, transparent 70%),
    radial-gradient(ellipse 45% 55% at 12% 75%, rgba(232, 179, 106, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 35% 35% at 50% 45%, rgba(127, 216, 201, 0.05) 0%, transparent 70%),
    linear-gradient(220deg, var(--sky-top), var(--sky-bottom));
  pointer-events: none;
}

::selection { background: rgba(242, 160, 189, 0.35); }

img { max-width: 100%; display: block; }
a { color: var(--pink); }

/* --------------------------------------------------------------------------
   Sand-stars canvas + dunes
   -------------------------------------------------------------------------- */

#sand-sky {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
}

.dunes {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: -1;
  pointer-events: none;
  line-height: 0;
}
.dunes svg { width: 100%; height: clamp(70px, 14vh, 160px); display: block; }

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(10, 14, 28, 0.0);
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
}
.nav.scrolled {
  background: rgba(10, 14, 28, 0.72);
  border-bottom-color: var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.nav-brand img { width: 34px; height: 34px; }
.nav-brand .brand-sand { color: var(--sand); }
.nav-brand .brand-cassall { color: var(--pink); }

.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-soft);
  text-decoration: none;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}
.nav-links a:hover { color: var(--text); background: rgba(236, 234, 244, 0.07); }
.nav-links a.active { color: var(--sand); }
.nav-links a.nav-cta {
  color: var(--ink-deep);
  background: var(--sand);
  font-weight: 600;
  margin-left: 0.5rem;
}
.nav-links a.nav-cta:hover { background: var(--pink); color: var(--ink-deep); }

@media (max-width: 600px) {
  .nav { padding: 0.7rem 0.9rem; }
  .nav-brand span { display: none; }
  .nav-links a { padding: 0.4rem 0.65rem; font-size: 0.8rem; }
  .nav-links a.nav-cta { margin-left: 0.2rem; }
}

/* --------------------------------------------------------------------------
   Layout primitives
   -------------------------------------------------------------------------- */

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.section { padding: clamp(3rem, 8vh, 5.5rem) 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sand);
  margin-bottom: 0.9rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-lede {
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 640px;
  margin-bottom: 2.25rem;
}

.accent-text {
  background: linear-gradient(100deg, var(--sand) 0%, var(--pink) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  background: var(--card-hover);
  border-color: var(--line-strong);
  box-shadow: 0 18px 45px rgba(4, 6, 14, 0.45);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* --------------------------------------------------------------------------
   Buttons, tags, chips
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.75rem 1.4rem;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--sand); color: var(--ink-deep); }
.btn-primary:hover { background: #f0c384; }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--pink); color: var(--pink); }
.btn-small { padding: 0.5rem 1rem; font-size: 0.8rem; }

.tech-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.25rem; }
.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-soft);
  background: rgba(236, 234, 244, 0.06);
  border: 1px solid var(--line);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  white-space: nowrap;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--teal);
  border: 1px solid rgba(127, 216, 201, 0.35);
  background: rgba(127, 216, 201, 0.08);
  padding: 0.32rem 0.85rem;
  border-radius: 999px;
}
.pill.pill-live::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--line);
  padding: 2.25rem 0 calc(2.25rem + clamp(40px, 8vh, 90px));
  margin-top: 3rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
}
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-soft);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.footer-links a:hover { color: var(--sand); }

/* --------------------------------------------------------------------------
   Reveal-on-scroll
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card, .btn { transition: none; }
  .pill.pill-live::before { animation: none; }
}