/*
 * base.css — Shared kiosk foundation
 * Responsibility: global reset, portrait lock, shared layout tokens, page-fade, back-dock
 */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;800&display=swap');

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

/* ── Portrait kiosk lock ── */
html, body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: #030712;
  font-family: 'Outfit', sans-serif;
  user-select: none;
  touch-action: none;
}

/* ── Master 9:16 kiosk frame ── */
#kiosk-screen {
  position: relative;
  width: 100vw;
  height: 100vh;
  max-width: calc(100vh * (9 / 16));
  margin: 0 auto;
  overflow: hidden;
  background: #030712;
}

/* ── Ambient star-particle background ── */
#ambient-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%,  rgba(0, 140, 255, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(123, 44, 191, 0.10) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 20% 60%, rgba(0, 229, 255, 0.07) 0%, transparent 70%),
    linear-gradient(180deg, #050d1a 0%, #030712 40%, #04091a 100%);
}

#ambient-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.35) 1px, transparent 1px),
    radial-gradient(circle, rgba(0,229,255,0.20)   1px, transparent 1px);
  background-size: 60px 60px, 120px 120px;
  background-position: 0 0, 30px 30px;
  animation: particleDrift 25s linear infinite;
  opacity: 0.4;
}

@keyframes particleDrift {
  from { background-position: 0 0,    30px 30px;   }
  to   { background-position: 60px 120px, 90px 150px; }
}

/* ── Page fade-in on navigation ── */
body {
  animation: pageFadeIn 0.5s ease forwards;
}

@keyframes pageFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Shared back dock (absolute to kiosk-screen) ── */
.back-dock {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: clamp(14px,3vh,24px) clamp(18px,4vw,32px) clamp(18px,3.5vh,32px);
  background: linear-gradient(0deg, rgba(3,7,18,0.95) 0%, rgba(3,7,18,0) 100%);
  display: flex;
  justify-content: center;
  z-index: 10;
}

.btn-back {
  height: clamp(44px,7vh,58px);
  padding: 0 clamp(22px,5vw,36px);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  color: rgba(255,255,255,0.75);
  font-family: 'Outfit', sans-serif;
  font-size: clamp(11px,1.8vw,14px);
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.btn-back:hover {
  background: rgba(0,229,255,0.12);
  border-color: rgba(0,229,255,0.40);
  color: #00E5FF;
}