/* ===== Base ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  min-height: 100dvh;
  background: #000;
  overflow: hidden;
}

body {
  display: grid;
  place-items: center;
  padding: max(16px, env(safe-area-inset-top)) clamp(16px, 5vw, 32px)
           max(16px, env(safe-area-inset-bottom));
  font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #ff2d2d;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

/* Luz vermelha difusa de fundo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(60vmax 45vmax at 50% 55%, rgba(255, 20, 20, 0.14), transparent 70%),
    radial-gradient(30vmax 22vmax at 50% 50%, rgba(255, 0, 0, 0.08), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.stage {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 460px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(28px, 7vh, 48px);
  text-align: center;
}

/* ===== Título ===== */
.headline {
  font-size: clamp(1.15rem, 5.2vw, 1.85rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #ff3131;
  text-shadow: 0 0 18px rgba(255, 30, 30, 0.35);
  text-wrap: balance;
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* ===== Barra ===== */
.slider {
  position: relative;
  width: 100%;
  max-width: clamp(360px, 92vw, 420px);
  height: clamp(64px, 16vw, 74px);
  border-radius: 999px;
  background: linear-gradient(180deg, #0b0b0b, #050505);
  border: 1px solid rgba(255, 40, 40, 0.45);
  box-shadow: 0 0 24px rgba(255, 20, 20, 0.12), inset 0 0 22px rgba(255, 0, 0, 0.05);
  overflow: hidden;
  animation: fadeUp 0.7s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.slider__fill {
  position: absolute;
  inset: 0;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(255, 0, 0, 0.28), rgba(255, 60, 60, 0.14));
  will-change: transform;
}

.slider__hint {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding-left: clamp(52px, 14vw, 62px);
  font-size: clamp(0.8rem, 3.4vw, 0.95rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 70, 70, 0.75);
  pointer-events: none;
  user-select: none;
}

.slider__success {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(0.9rem, 3.8vw, 1.05rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #ff4d4d;
  text-shadow: 0 0 16px rgba(255, 40, 40, 0.6);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

/* ===== Presente ===== */
.knob {
  position: absolute;
  top: 50%;
  left: clamp(5px, 1.4vw, 7px);
  width: clamp(52px, 13vw, 60px);
  height: clamp(52px, 13vw, 60px);
  margin-top: calc(clamp(52px, 13vw, 60px) / -2);
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 60, 60, 0.55);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, #1a0505, #060606);
  box-shadow: 0 0 18px rgba(255, 25, 25, 0.35);
  font-size: clamp(1.35rem, 5.5vw, 1.6rem);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  will-change: transform;
  animation: pulse 2.2s ease-in-out infinite;
}

.knob:focus-visible {
  outline: 2px solid #ff4d4d;
  outline-offset: 3px;
}

.knob.is-dragging {
  cursor: grabbing;
  animation: none;
  transform: translateX(var(--x, 0px)) scale(1.08);
}

.knob.is-returning,
.knob.is-snapping {
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 14px rgba(255, 25, 25, 0.28); }
  50%      { box-shadow: 0 0 26px rgba(255, 40, 40, 0.55); }
}

/* ===== Sucesso ===== */
.slider.is-unlocked { border-color: rgba(255, 70, 70, 0.9); animation: successGlow 0.6s ease-out; }
.slider.is-unlocked .slider__hint { opacity: 0 !important; }
.slider.is-unlocked .slider__success { opacity: 1; }
.slider.is-unlocked .knob { animation: none; }

@keyframes successGlow {
  0%   { box-shadow: 0 0 0 rgba(255, 30, 30, 0.6); }
  40%  { box-shadow: 0 0 46px rgba(255, 40, 40, 0.75); }
  100% { box-shadow: 0 0 24px rgba(255, 20, 20, 0.2); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}