:root {
  --bg: #f7fbf2;
  --paper: #fffef9;
  --ink: #27324b;
  --muted: #6f7d96;
  --green: #7bdc45;
  --green-deep: #55b92f;
  --yellow: #ffe27a;
  --yellow-deep: #e5c952;
  --blue: #9bdcff;
  --blue-deep: #66b7e9;
  --line: #dbe8cd;
  --shadow: 0 10px 0 #dce9cf, 0 22px 32px rgba(63, 89, 43, 0.08);
  --shadow-soft: 0 10px 0 rgba(220, 233, 207, 0.92);
  --radius-xl: 34px;
  --radius-lg: 26px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 226, 122, 0.52), transparent 24%),
    radial-gradient(circle at top right, rgba(154, 221, 255, 0.38), transparent 24%),
    linear-gradient(180deg, #f9fff4 0%, #eef8e7 100%);
}

button {
  font: inherit;
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
}

.hidden {
  display: none !important;
}

.app-shell {
  max-width: 1520px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-radius: 30px;
  background: rgba(255, 253, 248, 0.96);
  border: 3px solid var(--line);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-badge {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #fff1be 0%, #ffffff 100%);
  border: 3px solid var(--line);
  box-shadow: 0 8px 0 #f0e3b1;
  font-size: 1.5rem;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 800;
  color: #6bb32f;
}

h1 {
  margin: 0;
  font-family: "Baloo 2", "Noto Sans SC", sans-serif;
  font-size: clamp(1.9rem, 3.7vw, 3.2rem);
  line-height: 1;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ghost-button,
.primary-button,
.voice-button {
  border-radius: 999px;
  padding: 14px 20px;
  font-weight: 800;
  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
}

.ghost-button:hover,
.primary-button:hover,
.voice-button:hover,
.map-node:hover,
.map-start:hover {
  transform: translateY(-1px);
}

.ghost-button:active,
.primary-button:active,
.voice-button:active,
.map-node:active,
.map-start:active {
  transform: translateY(2px);
  box-shadow: none;
}

.ghost-button {
  color: var(--ink);
  background: #ffffff;
  border: 3px solid var(--line);
  box-shadow: 0 6px 0 #ebf4e1;
}

.ghost-button.small {
  padding: 10px 14px;
}

.icon-button,
.voice-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.primary-button {
  color: #fff;
  background: linear-gradient(180deg, #8fe647 0%, var(--green) 100%);
  box-shadow: 0 6px 0 var(--green-deep);
}

.voice-button {
  color: var(--ink);
  background: linear-gradient(180deg, #bdecff 0%, var(--blue) 100%);
  border: 3px solid #86cff5;
  box-shadow: 0 6px 0 var(--blue-deep);
}

.world-screen {
  margin-top: 18px;
}

.map-shell {
  position: relative;
  min-height: clamp(620px, 76vh, 840px);
  border-radius: 44px;
  overflow: hidden;
  border: 3px solid rgba(215, 225, 198, 0.95);
  box-shadow: var(--shadow);
  background: #f8fbf3;
}

.map-shell::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 34px;
  border: 2px dashed rgba(255, 255, 255, 0.65);
  pointer-events: none;
  z-index: 1;
}

.map-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.cloud,
.route,
.trail-dot,
.map-spark {
  transform-box: fill-box;
  transform-origin: center;
}

@keyframes driftA {
  0%, 100% { transform: translateX(0) translateY(0); }
  50% { transform: translateX(18px) translateY(-8px); }
}

@keyframes driftB {
  0%, 100% { transform: translateX(0) translateY(0); }
  50% { transform: translateX(-16px) translateY(10px); }
}

@keyframes driftC {
  0%, 100% { transform: translateX(0) translateY(0); }
  50% { transform: translateX(12px) translateY(-6px); }
}

@keyframes breathePath {
  0%, 100% { opacity: 0.56; stroke-dashoffset: 0; }
  50% { opacity: 1; stroke-dashoffset: -24; }
}

@keyframes floatFox {
  0%, 100% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(-10px) scale(1.03); }
}

@keyframes floatBear {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-7px) rotate(-2deg); }
}

@keyframes hopCat {
  0%, 100% { transform: translateY(0px) scale(1); }
  45% { transform: translateY(-12px) scale(1.05); }
}

@keyframes wiggleRabbit {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(3deg); }
}

@keyframes pulseSpark {
  0%, 100% { transform: scale(0.88); opacity: 0.45; }
  50% { transform: scale(1.12); opacity: 1; }
}

@keyframes pulseStart {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

@keyframes floatTrail {
  0% { offset-distance: 0%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}

.cloud-a { animation: driftA 10s ease-in-out infinite; }
.cloud-b { animation: driftB 11s ease-in-out infinite; }
.cloud-c { animation: driftC 12s ease-in-out infinite; }
.route-main { animation: breathePath 3.2s ease-in-out infinite; }
.route-back { animation: breathePath 4.2s ease-in-out infinite reverse; }
.spark-a,
.spark-b,
.trail-dot {
  animation: pulseSpark 1.8s ease-in-out infinite;
}

.map-node {
  position: absolute;
  width: 126px;
  height: 126px;
  border-radius: 38px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.95);
  border: 4px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-soft);
  z-index: 2;
  animation: pulseSpark 2.8s ease-in-out infinite;
}

.map-node .node-emoji {
  font-size: 4rem;
  line-height: 1;
}

.map-node.active {
  outline: 7px solid rgba(123, 207, 57, 0.24);
}

.fox-node {
  background: linear-gradient(180deg, #fff3cf 0%, #ffffff 100%);
}

.bear-node {
  background: linear-gradient(180deg, #dcf8e8 0%, #ffffff 100%);
}

.cat-node {
  background: linear-gradient(180deg, #e2f4ff 0%, #ffffff 100%);
}

.rabbit-node {
  background: linear-gradient(180deg, #fff1c6 0%, #ffffff 100%);
}

.fox-node {
  left: 12%;
  bottom: 18%;
  animation: floatFox 2.6s ease-in-out infinite;
}

.bear-node {
  left: 30%;
  top: 34%;
  animation: floatBear 3s ease-in-out infinite;
}

.cat-node {
  left: 56%;
  top: 31%;
  animation: hopCat 2.4s ease-in-out infinite;
}

.rabbit-node {
  right: 12%;
  top: 20%;
  animation: wiggleRabbit 2.2s ease-in-out infinite;
}

.map-start {
  position: absolute;
  left: 50%;
  bottom: 12%;
  transform: translateX(-50%);
  width: 116px;
  height: 116px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid #e7e2cf;
  box-shadow: 0 10px 0 #f0e6b8;
  font-size: 2.1rem;
  font-weight: 900;
  z-index: 3;
  animation: pulseStart 2.1s ease-in-out infinite;
}

.map-start span {
  display: inline-block;
  transform: translateX(3px);
}

.lesson-screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(247, 251, 242, 0.92);
  backdrop-filter: blur(8px);
  z-index: 20;
}

.lesson-card {
  position: relative;
  width: min(760px, calc(100vw - 32px));
  min-height: 520px;
  padding: 28px;
  border-radius: 44px;
  background: linear-gradient(180deg, #fffdf8 0%, #f8fbf3 100%);
  border: 4px solid var(--line);
  box-shadow: var(--shadow);
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 18px;
}

.back-link {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: #ffffff;
  border: 3px solid var(--line);
  box-shadow: 0 6px 0 #ebf4e1;
  font-size: 1.3rem;
}

.lesson-art {
  width: 240px;
  height: 240px;
  border-radius: 70px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #fff3c8 0%, #ffffff 100%);
  border: 4px solid var(--line);
  box-shadow: 0 10px 0 #f1e6b5;
  font-size: 8rem;
}

.lesson-word {
  font-family: "Baloo 2", "Noto Sans SC", sans-serif;
  font-size: clamp(3.2rem, 6vw, 5.6rem);
  font-weight: 800;
  line-height: 1;
}

.lesson-subcopy {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
  text-align: center;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.parent-panel {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(255, 255, 255, 0.48);
  backdrop-filter: blur(6px);
  z-index: 30;
}

.parent-card {
  width: min(700px, calc(100vw - 32px));
  border-radius: 34px;
  padding: 22px;
  background: #ffffff;
  border: 4px solid var(--line);
  box-shadow: var(--shadow);
}

.parent-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.parent-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.parent-stat {
  padding: 18px;
  border-radius: 24px;
  background: linear-gradient(180deg, #fffdf8 0%, #f7fbf2 100%);
  border: 3px solid var(--line);
  box-shadow: 0 8px 0 #ecf4e3;
}

.parent-stat span {
  display: block;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 8px;
}

.parent-stat strong {
  font-family: "Baloo 2", "Noto Sans SC", sans-serif;
  font-size: 1.7rem;
}

@media (max-width: 1100px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .map-shell {
    min-height: 700px;
  }

  .parent-grid {
    grid-template-columns: 1fr;
  }

  .fox-node {
    left: 10%;
    bottom: 16%;
  }

  .bear-node {
    left: 28%;
    top: 35%;
  }

  .cat-node {
    left: 54%;
    top: 32%;
  }

  .rabbit-node {
    right: 9%;
    top: 20%;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 14px;
  }

  .topbar {
    padding: 14px 16px;
    border-radius: 26px;
  }

  .brand-badge {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    font-size: 1.2rem;
  }

  h1 {
    font-size: clamp(1.5rem, 7vw, 2.4rem);
  }

  .ghost-button,
  .primary-button,
  .voice-button {
    padding: 12px 16px;
  }

  .map-shell {
    min-height: 640px;
    border-radius: 34px;
  }

  .map-node {
    width: 92px;
    height: 92px;
    border-radius: 28px;
  }

  .map-node .node-emoji {
    font-size: 3rem;
  }

  .fox-node {
    left: 6%;
    bottom: 15%;
  }

  .bear-node {
    left: 26%;
    top: 34%;
  }

  .cat-node {
    left: 52%;
    top: 31%;
  }

  .rabbit-node {
    right: 6%;
    top: 18%;
  }

  .map-start {
    width: 88px;
    height: 88px;
    bottom: 9%;
    font-size: 1.8rem;
  }

  .lesson-card {
    width: min(100vw - 20px, 680px);
    min-height: 420px;
    padding: 22px;
    border-radius: 32px;
  }

  .lesson-art {
    width: 180px;
    height: 180px;
    font-size: 6.2rem;
  }
}

@media (max-width: 540px) {
  .topbar {
    gap: 12px;
  }

  .brand {
    gap: 10px;
  }

  .eyebrow {
    font-size: 0.66rem;
  }

  .map-shell {
    min-height: 560px;
  }

  .map-shell::before {
    inset: 10px;
  }

  .map-node {
    width: 82px;
    height: 82px;
    border-radius: 24px;
  }

  .map-node .node-emoji {
    font-size: 2.6rem;
  }

  .fox-node {
    left: 4%;
  }

  .bear-node {
    left: 24%;
  }

  .cat-node {
    left: 49%;
  }

  .rabbit-node {
    right: 4%;
  }

  .map-start {
    width: 78px;
    height: 78px;
    bottom: 8%;
    font-size: 1.55rem;
  }

  .lesson-card {
    padding: 18px;
    width: calc(100vw - 16px);
  }

  .lesson-art {
    width: 160px;
    height: 160px;
    border-radius: 56px;
    font-size: 5.4rem;
  }

  .lesson-word {
    font-size: clamp(2.7rem, 14vw, 4rem);
  }
}

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