/*
  Modern minimal theme — refined visuals, no copy changes.
  - Fluid type scale and spacing
  - Subtle layered background and gradient accents
  - Accessible focus styles and dark mode
*/

/* Design tokens */
:root{
  /* Surfaces */
  --bg: #ffffff;
  --bg-weak: #fbf4f4;
  --text: #0b1020;
  --muted: #475569; /* slate-600 */
  --border: rgba(2,6,23,.08);

  /* Accents */
  --indigo-500: #DC2626; /* red-600 */
  --violet-500: #B91C1C; /* red-700 */
  --pink-500: #7F1D1D;   /* red-900 */
  --ring: rgba(220,38,38,.45);

  /* Effects */
  --button-shadow: 0 12px 28px rgba(220,38,38,.28);
  --elev-1: 0 8px 28px rgba(2,6,23,.10);
  --elev-2: 0 18px 48px rgba(2,6,23,.16);

  /* Rounding */
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;

  /* Spacing */
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 20px;
  --space-5: 28px;
  --space-6: 36px;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0e12;
    --bg-weak: #160c0c;
    --text: #E5E7EB;
    --muted: #94A3B8; /* slate-400 */
    --border: rgba(148,163,184,.18);
    --button-shadow: 0 12px 28px rgba(220,38,38,.36);
    --elev-1: 0 10px 32px rgba(2,6,23,.35);
    --elev-2: 0 22px 60px rgba(2,6,23,.45);
  }
}

/* Reset */
*{ box-sizing: border-box }
html,body{ height: 100% }
html:focus-within{ scroll-behavior: smooth }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:where(h1,h2,h3,h4,h5,h6,p){ margin: 0 }
:where(img,svg,video,canvas){ display:block; max-width:100% }
button, input, select, textarea{ font: inherit }

/* Layered background */
.bg-layer{
  position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background:
    radial-gradient(80% 60% at 50% -10%, color-mix(in hsl, var(--indigo-500) 20%, transparent), transparent 60%),
    radial-gradient(60% 40% at 100% 10%, color-mix(in hsl, var(--violet-500) 22%, transparent), transparent 60%),
    radial-gradient(40% 35% at 0% 10%, color-mix(in hsl, var(--pink-500) 18%, transparent), transparent 60%),
    linear-gradient(180deg, rgba(2,6,23,.02), rgba(2,6,23,0));
}

/* Layout */
.wrap{ max-width: 980px; margin: 0 auto; padding: clamp(28px, 4vw, 48px) clamp(16px, 3vw, 28px) 84px }
.site-header{ margin: var(--space-1) 0 var(--space-5); text-align: center }
.brand{
  display: inline-block; padding: 8px 12px; border-radius: 999px;
  font-weight: 700; font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); background: color-mix(in hsl, var(--bg-weak) 65%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: saturate(1.2) blur(2px);
}
.hero{
  margin: 16px auto 18px;
  font-weight: 800; letter-spacing: -.02em; line-height: 1.08;
  font-size: clamp(32px, 6vw, 56px);
  max-width: 22ch;
}

/* Video */
.video-card{ margin: 10px 0 24px }
.video-frame{
  position: relative; border-radius: var(--radius-lg); padding: 1.5px; /* gradient border */
  background: linear-gradient(
    135deg,
    color-mix(in hsl, var(--indigo-500) 80%, transparent),
    color-mix(in hsl, var(--violet-500) 55%, transparent) 40%,
    color-mix(in hsl, var(--pink-500) 45%, transparent)
  );
  box-shadow: var(--elev-2);
}
.video-frame::after{
  content: ""; position: absolute; inset: -24px; z-index: -1; filter: blur(32px);
  background: radial-gradient(40% 60% at 50% 0%, color-mix(in hsl, var(--indigo-500) 35%, transparent), transparent 70%);
}
.video-shell{
  position: relative; width: 100%; aspect-ratio: 16/9; background: #000; overflow: hidden;
  border-radius: calc(var(--radius-lg) - 2px);
}
.video-shell iframe{ position: absolute; inset: 0; width: 100%; height: 100%; border: 0 }

/* CTA */
.cta{ margin-top: 22px; text-align: center }
.cta .btn{
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  text-decoration: none; cursor: pointer; white-space: nowrap;
  background:
    linear-gradient(90deg, var(--indigo-500), var(--violet-500) 50%, var(--pink-500));
  color: #fff; font-weight: 800; letter-spacing: .01em; font-size: 16px;
  padding: 14px 22px; border-radius: var(--radius-md); border: 0;
  box-shadow: var(--button-shadow);
  transition: transform .15s ease, box-shadow .2s ease, filter .2s ease;
  position: relative; overflow: hidden;
}
.cta .btn::after{
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.28) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform .6s ease;
}
.cta .btn:hover{ transform: translateY(-1px); box-shadow: 0 20px 50px rgba(220,38,38,.38); filter: saturate(1.06) }
.cta .btn:hover::after{ transform: translateX(100%) }
.cta .btn:active{ transform: translateY(0) }
.cta .btn:focus{ outline: 0; box-shadow: 0 0 0 6px var(--ring) }
.cta .btn:focus-visible{ outline: 0; box-shadow: 0 0 0 6px var(--ring) }

/* Footer */
.site-footer{ margin-top: 48px; text-align: center; color: var(--muted); font-size: 12px }

/* Respect reduced-motion */
@media (prefers-reduced-motion: reduce){
  .cta .btn{ transition: none }
  .cta .btn:hover{ transform: none }
  .cta .btn::after{ display:none }
}