:root {
  --bg: #e8eef7;
  --ink: #152033;
  --muted: #6a7c93;
  --panel: rgba(255, 255, 255, 0.62);
  --line: rgba(90, 120, 180, 0.28);
  --accent-a: #4f8cff;
  --accent-b: #7a5cff;
  --accent-c: #2fd4c8;
  --font-brand: "Exo 2", sans-serif;
  --font-ui: "Rajdhani", sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
}

body {
  display: grid;
  place-items: center;
  color: var(--ink);
  font-family: var(--font-ui);
  background: var(--bg);
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
}

.mesh {
  position: fixed;
  inset: -15%;
  z-index: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(79, 140, 255, 0.35), transparent 28%),
    radial-gradient(circle at 85% 25%, rgba(122, 92, 255, 0.28), transparent 30%),
    radial-gradient(circle at 50% 85%, rgba(47, 212, 200, 0.25), transparent 32%),
    linear-gradient(160deg, #eef3fb, #e7ecf6 50%, #dde7f5);
  animation: mesh-move 16s ease-in-out infinite alternate;
}

.ring {
  position: fixed;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: 0 0 40px rgba(79, 140, 255, 0.12);
  pointer-events: none;
  z-index: 1;
}

.ring-a {
  width: 22rem;
  height: 22rem;
  top: 8%;
  right: -6rem;
  animation: spin 28s linear infinite;
}

.ring-b {
  width: 16rem;
  height: 16rem;
  left: -4rem;
  bottom: 12%;
  border-color: rgba(47, 212, 200, 0.35);
  animation: spin 36s linear infinite reverse;
}

.stage {
  position: relative;
  z-index: 2;
  width: min(100%, 22rem);
  padding:
    calc(1.25rem + var(--safe-top))
    calc(1.25rem + var(--safe-right))
    calc(1.25rem + var(--safe-bottom))
    calc(1.25rem + var(--safe-left));
  text-align: center;
}

.brand {
  margin: 0;
  font-family: var(--font-brand);
  font-size: clamp(2rem, 9vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(100deg, #1a2b44 10%, var(--accent-a) 45%, var(--accent-b) 70%, var(--accent-c));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.panel {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.2rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.75) inset,
    0 18px 40px rgba(40, 70, 120, 0.12);
}

input,
button {
  width: 100%;
  min-height: 3.2rem;
  border-radius: 0.8rem;
  font: 700 1.05rem/1.1 var(--font-ui);
  letter-spacing: 0.04em;
}

input {
  border: 1px solid rgba(90, 120, 180, 0.35);
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  padding: 0.85rem 0.95rem;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input::placeholder {
  color: #8a9bb0;
  font-weight: 600;
  letter-spacing: 0.02em;
}

input:focus {
  border-color: var(--accent-a);
  box-shadow: 0 0 0 4px rgba(79, 140, 255, 0.18);
}

button {
  border: 0;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(100deg, var(--accent-a), var(--accent-b) 55%, var(--accent-c));
  background-size: 160% 100%;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: transform 0.15s ease, background-position 0.25s ease, filter 0.15s ease;
}

button:hover {
  background-position: 100% 0;
  filter: brightness(1.04);
}

button:active {
  transform: scale(0.985);
}

@keyframes mesh-move {
  from {
    transform: translate3d(-1%, 0, 0) scale(1);
  }
  to {
    transform: translate3d(2%, 1.5%, 0) scale(1.04);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .mesh,
  .ring,
  button {
    animation: none;
    transition: none;
  }
}