/* Design tokens */
:root{
  --gold: #ce8a0a;
  --teal: #2e6962;
  --blue: #1d5fa8;

  --bg-0: #050608;
  --bg-1: #0a0d12;
  --card: rgba(9, 10, 14, 0.62);
  --card-border: rgba(206, 138, 10, 0.18);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.70);

  --shadow: 0 24px 70px rgba(0,0,0,0.55);
  --radius: 22px;

  --stripe-width: 2px;
  --stripe-gap: 2px;
  --marginal-gap: var(--stripe-gap);
  --marginal-width: calc((3 * var(--stripe-width)) + (2 * var(--stripe-gap)));
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  color: var(--text);
  background: var(--bg-0);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  overflow-x: hidden;
}

/* Background: dark flowing gradients + subtle grain */
body::before{
  content:"";
  position: fixed;
  inset: -30vh -30vw;
  z-index: -2;
  background:
    radial-gradient(1200px 800px at 15% 20%, rgba(46, 105, 98, 0.28), transparent 60%),
    radial-gradient(1000px 700px at 78% 24%, rgba(29, 95, 168, 0.26), transparent 58%),
    radial-gradient(900px 650px at 55% 80%, rgba(206, 138, 10, 0.22), transparent 62%),
    linear-gradient(165deg, var(--bg-0), var(--bg-1) 55%, #06070a);
  filter: saturate(1.08) contrast(1.02);
  animation: drift 14s ease-in-out infinite alternate;
}

body::after{
  content:"";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(0,0,0,0.15), rgba(0,0,0,0.55)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0 1px, transparent 1px 3px);
  mix-blend-mode: overlay;
  opacity: 0.55;
}

/* Subtle moving sheen for more dynamism */
body::selection{ background: rgba(206, 138, 10, 0.28); }
body::-moz-selection{ background: rgba(206, 138, 10, 0.28); }

html::before{
  content:"";
  position: fixed;
  inset: -20vh -20vw;
  z-index: -1;
  pointer-events: none;
  background:
    conic-gradient(from 210deg at 50% 40%,
      rgba(206, 138, 10, 0.00) 0deg,
      rgba(206, 138, 10, 0.10) 40deg,
      rgba(29, 95, 168, 0.10) 110deg,
      rgba(46, 105, 98, 0.10) 190deg,
      rgba(206, 138, 10, 0.00) 360deg
    );
  filter: blur(34px) saturate(1.15);
  opacity: 0.55;
  mix-blend-mode: screen;
  animation: sheen 18s linear infinite;
}

@keyframes drift{
  0%{ transform: translate3d(-1.5%, -1.0%, 0) scale(1.02); }
  100%{ transform: translate3d(1.6%, 1.2%, 0) scale(1.03); }
}

@keyframes sheen{
  0%{ transform: translate3d(-2%, -1%, 0) rotate(0deg) scale(1.05); }
  50%{ transform: translate3d(2%, 1%, 0) rotate(180deg) scale(1.06); }
  100%{ transform: translate3d(-2%, -1%, 0) rotate(360deg) scale(1.05); }
}

/* Marginal stripes (only once, vertical, beside each other) */
.marginal-stripes{
  position: fixed;
  left: var(--marginal-gap);
  top: 0;
  width: var(--marginal-width);
  height: 100vh;
  z-index: 3;
  background: linear-gradient(
    90deg,
    var(--gold) 0 var(--stripe-width),
    transparent var(--stripe-width) calc(var(--stripe-width) + var(--stripe-gap)),
    var(--teal) calc(var(--stripe-width) + var(--stripe-gap)) calc((2 * var(--stripe-width)) + var(--stripe-gap)),
    transparent calc((2 * var(--stripe-width)) + var(--stripe-gap)) calc((2 * var(--stripe-width)) + (2 * var(--stripe-gap))),
    var(--blue) calc((2 * var(--stripe-width)) + (2 * var(--stripe-gap))) calc((3 * var(--stripe-width)) + (2 * var(--stripe-gap)))
  );
  box-shadow: 1px 0 14px rgba(0,0,0,0.42);
}

.shell{
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(18px, 3.6vw, 44px);
  padding-left: calc(clamp(18px, 3.6vw, 44px) + var(--marginal-gap) + var(--marginal-width));
}

.card{
  width: min(980px, 100%);
  border-radius: var(--radius);
  background: transparent;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  overflow: visible;
  position: relative;
}

.card::before{
  content: none;
}

.header{
  position: relative;
  padding: clamp(22px, 4vw, 46px) clamp(18px, 3.5vw, 42px) clamp(10px, 1.6vw, 18px);
  text-align: center;
}

.logo{
  width: min(240px, 66vw);
  height: auto;
  display: block;
  margin: 0 auto;
  filter: none;
}

.subtitle{
  margin: clamp(14px, 1.8vw, 18px) auto 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.55;
  color: var(--muted);
  letter-spacing: 0.2px;
}

.hero{
  position: relative;
  padding: clamp(12px, 2.4vw, 22px) clamp(18px, 3.5vw, 42px) clamp(26px, 4.2vw, 48px);
}

.gem-wrap{
  width: min(440px, 92vw);
  margin: 0 auto;
  position: relative;
  border-radius: 18px;
  overflow: visible;
}

.gem{
  width: 100%;
  height: auto;
  display: block;
  border-radius: 18px;
  box-shadow: none;
}

/* Small screens: reduce reflection height and spacing */
@media (max-width: 520px){
  :root{ --stripe-width: 2px; --stripe-gap: 2px; --marginal-gap: var(--stripe-gap); }
}

@media (prefers-reduced-motion: reduce){
  body::before{ animation: none; }
  html::before{ animation: none; }
}