:root {
  --bg-1: #f3eaff;
  --bg-2: #e4d2ff;
  --violet-300: #b58cf7;
  --violet-500: #8c4de8;
  --violet-700: #6427bf;
  --violet-900: #2b134d;
  --mint: #25c08a;
  --red: #ff5d8f;
  --card: rgba(255, 255, 255, 0.8);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Nunito", sans-serif;
  color: var(--violet-900);
  background:
    radial-gradient(circle at 12% 10%, #ffffff 0%, transparent 30%),
    radial-gradient(circle at 88% 85%, #d1b5ff 0%, transparent 36%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
  overflow: hidden;
}

body.locked .app {
  pointer-events: none;
  user-select: none;
  filter: blur(6px) saturate(0.85);
}

.lock-screen {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 4vw;
  background:
    radial-gradient(circle at 22% 20%, rgba(255, 255, 255, 0.32), transparent 40%),
    radial-gradient(circle at 80% 82%, rgba(255, 154, 219, 0.24), transparent 38%),
    linear-gradient(145deg, rgba(120, 60, 220, 0.82), rgba(255, 107, 184, 0.62));
  backdrop-filter: blur(8px);
  transition: opacity 700ms ease, transform 700ms ease;
  opacity: 1;
  transform: scale(1);
}

body.unlocked .lock-screen {
  opacity: 0;
  transform: scale(1.02);
  pointer-events: none;
}

.lock-card {
  width: min(92vw, 460px);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(128, 54, 193, 0.3);
  padding: 1.2rem 1.15rem 1.1rem;
  text-align: center;
  box-shadow: 0 14px 32px rgba(52, 19, 92, 0.28);
}

.lock-title {
  margin: 0 0 0.25rem;
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  line-height: 1.08;
  color: #8f35d6;
}

.lock-subtitle {
  margin: 0.35rem 0 0;
  font-size: 0.98rem;
  font-weight: 700;
}

.lock-form {
  margin-top: 0.8rem;
  display: grid;
  gap: 0.55rem;
}

.lock-form input {
  width: 100%;
  border: 1px solid rgba(128, 54, 193, 0.35);
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
  font: inherit;
  text-align: center;
}

.lock-form input:focus {
  outline: 2px solid rgba(181, 140, 247, 0.8);
  border-color: rgba(128, 54, 193, 0.55);
}

.lock-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.62rem 1rem;
  font: inherit;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(90deg, #7a31d6, #ef5ea9);
  cursor: pointer;
}

.lock-hearts {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.lock-heart {
  position: absolute;
  font-size: clamp(1.3rem, 2.8vw, 2.4rem);
  color: rgba(255, 255, 255, 0.78);
  animation: lockFloat 4.4s ease-in-out infinite;
}

.lock-heart:nth-child(1) {
  left: 8%;
  top: 14%;
}

.lock-heart:nth-child(2) {
  right: 10%;
  top: 12%;
  animation-delay: 650ms;
}

.lock-heart:nth-child(3) {
  left: 13%;
  bottom: 14%;
  animation-delay: 1300ms;
}

.lock-heart:nth-child(4) {
  right: 14%;
  bottom: 16%;
  animation-delay: 1850ms;
}

.bg-hearts {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
  transition: opacity 1100ms ease, transform 1100ms ease;
  will-change: opacity, transform;
}

.bg-heart {
  position: absolute;
  bottom: -16vh;
  left: 50vw;
  width: var(--size, 28px);
  height: var(--size, 28px);
  background: var(--color, #8f88ff);
  opacity: var(--alpha, 0.15);
  transform: rotate(45deg);
  animation: bgFloat var(--dur, 20s) linear infinite;
  animation-delay: var(--delay, 0s);
}

.bg-heart::before,
.bg-heart::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: inherit;
}

.bg-heart::before {
  left: -50%;
}

.bg-heart::after {
  top: -50%;
}

.puzzle-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(circle at 40% 50%, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0));
  opacity: 1;
  transition: opacity 1100ms ease, transform 1100ms ease;
  will-change: opacity, transform;
}

.final-message {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 8vw;
  text-align: center;
  font-weight: 900;
  font-size: clamp(1.8rem, 4.8vw, 3.825rem);
  line-height: 1.28;
  text-shadow:
    0 4px 18px rgba(33, 16, 59, 0.75),
    0 1px 0 rgba(33, 16, 59, 0.5);
  opacity: 0;
  transform: translateY(14px) scale(0.98);
  transition: opacity 900ms ease, transform 900ms ease;
  pointer-events: none;
  z-index: 12;
}

.final-message-text {
  display: inline-block;
}

.final-line-1 {
  display: inline-block;
}

.final-line-2 {
  display: inline-block;
  margin-top: 0.24em;
  color: #ff71c1;
}

.final-char {
  display: inline-block;
}

.final-heart {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(5rem, 16vw, 12rem);
  line-height: 1;
  opacity: 0;
  transform: translateY(12px) scale(0.88);
  transition: opacity 900ms ease, transform 900ms ease;
  pointer-events: none;
  z-index: 13;
  text-shadow: 0 12px 28px rgba(33, 16, 59, 0.42);
}

.puzzle-tiles {
  position: absolute;
  inset: 0;
}

.puzzle-tile {
  position: absolute;
  left: var(--x, 0px);
  top: var(--y, 0px);
  width: var(--w, 100px);
  height: var(--h, 100px);
  border-radius: 10px;
  border: 1px solid rgba(203, 223, 255, 0.55);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
  opacity: 0;
  transform: scale(0.9);
  filter: saturate(0.9);
  transition: opacity 360ms ease, transform 360ms ease, filter 360ms ease;
}

.puzzle-tile.revealed {
  opacity: 0.95;
  transform: scale(1);
  filter: none;
}

.app {
  width: min(1500px, 100vw);
  height: 100dvh;
  margin: 0 auto;
  padding: clamp(0.3rem, 0.8vmin, 0.55rem) clamp(0.45rem, 1.3vmin, 0.9rem)
    clamp(0.35rem, 1vmin, 0.65rem);
  display: grid;
  grid-template-rows: 1fr auto;
  gap: clamp(0.35rem, 1vmin, 0.65rem);
  position: relative;
  z-index: 3;
  transition: opacity 1100ms ease, transform 1100ms ease;
  opacity: 1;
  transform: scale(1);
  will-change: opacity, transform;
}

body.rosco-complete .app,
.app.rosco-complete {
  opacity: 0;
  transform: scale(1.03);
  pointer-events: none;
}

body.rosco-complete .bg-hearts {
  opacity: 0;
  transform: scale(1.02);
}

body.rosco-complete .heart,
body.rosco-complete .bg-heart {
  opacity: 0 !important;
}

body.rosco-complete .puzzle-tile {
  border: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  transform: none !important;
  filter: none !important;
}

body.show-love-message .final-message {
  opacity: 1;
  transform: translateY(0) scale(1);
}

body.show-final-heart .final-message {
  opacity: 0;
  transform: translateY(-10px) scale(0.96);
}

body.show-final-heart .final-heart {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.panel {
  background: var(--card);
  border: 1px solid rgba(100, 39, 191, 0.24);
  border-radius: 24px;
  backdrop-filter: blur(6px);
  box-shadow: 0 12px 24px rgba(43, 19, 77, 0.1);
}

.rosco-stage {
  min-height: 0;
  display: grid;
  place-items: center;
}

.rosco-shell {
  position: relative;
  width: min(98vw, calc(100dvh - clamp(150px, 25dvh, 230px)));
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.rosco {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(140, 77, 232, 0.05) 0%, rgba(100, 39, 191, 0.19) 66%, rgba(100, 39, 191, 0.29) 100%);
}

.letter {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--letter-size, clamp(40px, 6.2vmin, 72px));
  height: var(--letter-size, clamp(40px, 6.2vmin, 72px));
  margin: calc(var(--letter-size, 48px) / -2);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: clamp(1rem, 1.9vmin, 1.55rem);
  font-weight: 900;
  color: #fff;
  background: var(--violet-500);
  border: 2px solid rgba(255, 255, 255, 0.75);
  transition: transform 160ms ease, background 160ms ease;
  transform: translate(var(--tx, 0px), var(--ty, 0px));
}

.letter.current {
  background: #2b134d;
  transform: translate(var(--tx, 0px), var(--ty, 0px)) scale(1.12);
}

.letter.correct {
  background: var(--mint);
}

.letter.wrong {
  background: var(--red);
}

.question-card {
  position: absolute;
  width: min(50%, 620px);
  text-align: center;
  border: 1px solid rgba(100, 39, 191, 0.2);
  border-radius: 18px;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.9), rgba(235, 221, 255, 0.86));
  padding: clamp(0.55rem, 1.35vmin, 0.95rem);
  box-shadow: 0 8px 22px rgba(43, 19, 77, 0.11);
}

.question-prefix {
  margin: 0;
  color: var(--violet-700);
  font-weight: 900;
  font-size: clamp(0.95rem, 1.5vmin, 1.2rem);
}

.question-text {
  margin: 0.35rem 0 0;
  font-weight: 800;
  font-size: clamp(0.9rem, 1.65vmin, 1.2rem);
  line-height: 1.3;
}

.bottom-panel {
  padding: clamp(0.45rem, 1.1vmin, 0.75rem) clamp(0.55rem, 1.3vmin, 0.9rem)
    clamp(0.55rem, 1.2vmin, 0.85rem);
}

.status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.95rem;
  justify-content: center;
}

.status p {
  margin: 0;
  font-size: clamp(0.84rem, 1.28vmin, 0.95rem);
}

.controls {
  margin-top: 0.65rem;
  display: grid;
  gap: 0.45rem;
}

.controls label {
  display: block;
  text-align: center;
  font-weight: 800;
}

.controls input {
  width: 100%;
  max-width: min(980px, 95%);
  margin: 0 auto;
  border: 1px solid rgba(100, 39, 191, 0.4);
  border-radius: 14px;
  padding: clamp(0.62rem, 1.2vmin, 0.78rem) 0.85rem;
  font: inherit;
  color: var(--violet-900);
  background: #fff;
}

.controls input:focus {
  outline: 2px solid var(--violet-300);
  border-color: var(--violet-500);
}

.controls input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.55rem;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: clamp(0.48rem, 1.2vmin, 0.58rem) clamp(0.88rem, 1.8vmin, 1.06rem);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  color: white;
  background: linear-gradient(90deg, var(--violet-700), var(--violet-500));
}

.btn:hover {
  filter: brightness(1.05);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  filter: none;
}

.btn.ghost {
  background: #eee8fb;
  color: var(--violet-900);
}

.feedback {
  margin: clamp(0.48rem, 1.1vmin, 0.68rem) 0 0;
  min-height: 1.2rem;
  font-weight: 800;
  text-align: center;
  font-size: clamp(0.83rem, 1.2vmin, 0.95rem);
}

/* Hearts shown on correct answers. */
.heart {
  position: fixed;
  bottom: -18px;
  width: 15px;
  height: 15px;
  background: #ff5a88;
  transform: rotate(45deg);
  pointer-events: none;
  opacity: 0.85;
  animation: floatUp 3.8s linear forwards;
  z-index: 30;
}

.heart.typing-heart {
  animation: typingBurst var(--dur, 2.4s) ease-out forwards;
}

.heart::before,
.heart::after {
  content: "";
  position: absolute;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: inherit;
}

.heart::before {
  left: -7.5px;
}

.heart::after {
  top: -7.5px;
}

@keyframes floatUp {
  0% {
    transform: translateY(0) rotate(45deg) scale(0.9);
  }
  100% {
    transform: translateY(-108vh) rotate(45deg) scale(1.15);
    opacity: 0;
  }
}

@keyframes typingBurst {
  0% {
    transform: translate3d(0, 0, 0) rotate(45deg) scale(0.85);
  }
  100% {
    transform: translate3d(var(--dx, 0px), var(--dy, -120px), 0) rotate(calc(45deg + var(--spin, 360deg))) scale(1.08);
    opacity: 0;
  }
}

@keyframes bgFloat {
  0% {
    transform: translate3d(0, 0, 0) rotate(45deg) scale(var(--scale, 1));
  }
  100% {
    transform: translate3d(var(--drift, 0vw), -130vh, 0) rotate(calc(45deg + var(--spin, 780deg))) scale(var(--scale, 1));
  }
}

@keyframes lockFloat {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-10px) scale(1.08);
  }
}

@media (max-width: 900px) {
  .app {
    padding: 0.32rem;
  }

  .question-card {
    width: min(72%, 420px);
  }
}