:root {
  color-scheme: light;
  --ink: #1d2a2e;
  --muted: #5f6f73;
  --line: #d9ece8;
  --surface: #ffffff;
  --sun: #f9f871;
  --grass: #6ee08d;
  --mint: #dff9ea;
  --sky: #b9ecff;
  --coral: #ff7f6e;
  --blue: #287ee7;
  --shadow: 0 18px 50px rgba(40, 126, 231, 0.14);
  font-family: ui-rounded, "SF Pro Rounded", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 8%, rgba(249, 248, 113, 0.55), transparent 28rem),
    linear-gradient(180deg, #effcff 0%, #f8fff5 48%, #fffdf1 100%);
  color: var(--ink);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.app-shell {
  width: min(1120px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px max(22px, env(safe-area-inset-bottom));
}

.loading {
  padding: 28px;
  font-size: 1.1rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: clamp(1.28rem, 3vw, 1.9rem);
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 14px;
  background: var(--sun);
  box-shadow: 0 8px 0 #b7ef72;
}

.nav {
  display: flex;
  gap: 8px;
}

.nav button,
.small-action {
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  border: 2px solid var(--line);
  font-weight: 800;
}

.nav button.active {
  background: var(--ink);
  color: white;
  border-color: var(--ink);
}

.parent-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.parent-tabs button {
  min-height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  background: white;
  border: 2px solid var(--line);
  color: var(--ink);
  font-weight: 900;
}

.parent-tabs button.active {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
}

.parent-gate {
  max-width: 720px;
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 18px;
  align-items: stretch;
}

.today-panel,
.parent-panel,
.video-panel,
.episode-panel,
.setup-panel {
  background: rgba(255, 255, 255, 0.86);
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.today-panel {
  padding: clamp(18px, 4vw, 34px);
}

.kicker {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--mint);
  color: #087f4f;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.05rem, 6vw, 4.35rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
}

h3 {
  margin-bottom: 8px;
  font-size: 1.08rem;
}

.cue {
  margin: 0 0 18px;
  padding: 16px;
  border-radius: 8px;
  background: #fff6c7;
  border: 2px solid #ffe268;
  font-weight: 900;
  font-size: clamp(1.35rem, 4.2vw, 2.45rem);
  line-height: 1.2;
}

.task {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: clamp(1rem, 2.5vw, 1.22rem);
  line-height: 1.55;
}

.primary-action,
.record-action {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--coral);
  color: white;
  font-weight: 950;
  box-shadow: 0 10px 0 #ffc0a8;
}

.secondary-action {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--blue);
  color: white;
  font-weight: 900;
}

.practice-visual {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(185, 236, 255, 0.9) 0 48%, transparent 48%),
    linear-gradient(180deg, #8df1a7 48%, #55d877 100%);
}

.demo-compare .practice-visual {
  width: 100%;
  min-height: 230px;
}

.sun {
  position: absolute;
  top: 28px;
  right: 34px;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 0 14px rgba(249, 248, 113, 0.25);
}

.target {
  position: absolute;
  top: 126px;
  right: 22%;
  width: 5px;
  height: 128px;
  background: #ffffff;
}

.direction-arrow {
  position: absolute;
  left: 49%;
  bottom: 145px;
  width: 180px;
  height: 10px;
  border-radius: 999px;
  background: rgba(40, 126, 231, 0.24);
  opacity: 0;
}

.direction-arrow::after {
  content: "";
  position: absolute;
  right: -12px;
  top: -10px;
  border-top: 15px solid transparent;
  border-bottom: 15px solid transparent;
  border-left: 22px solid rgba(40, 126, 231, 0.54);
}

.flight-path {
  position: absolute;
  left: 50%;
  bottom: 118px;
  width: 190px;
  height: 70px;
  border-top: 8px solid rgba(255, 255, 255, 0.9);
  border-radius: 60% 40% 0 0;
  opacity: 0;
  transform: rotate(-8deg);
}

.waist-line {
  position: absolute;
  top: 174px;
  width: 96px;
  height: 4px;
  border-radius: 999px;
  background: #ff7f6e;
  opacity: 0;
}

.waist-back {
  left: 21%;
}

.waist-front {
  left: 51%;
}

.footprint {
  position: absolute;
  bottom: 76px;
  width: 34px;
  height: 64px;
  border-radius: 50% 50% 44% 44%;
  background: rgba(255, 255, 255, 0.52);
  border: 3px solid rgba(40, 126, 231, 0.34);
  opacity: 0;
}

.footprint-left {
  left: 33%;
  transform: rotate(-4deg);
}

.footprint-right {
  left: 45%;
  transform: rotate(4deg);
}

.target::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  border-top: 23px solid transparent;
  border-bottom: 23px solid transparent;
  border-left: 55px solid var(--coral);
}

.mat {
  position: absolute;
  left: 14%;
  right: 14%;
  bottom: 34px;
  height: 112px;
  border-radius: 8px;
  background: #31b96b;
  box-shadow: inset 0 0 0 7px rgba(255, 255, 255, 0.26);
}

.ball {
  position: absolute;
  left: 50%;
  bottom: 102px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: inset -4px -5px 0 #dfeff0;
  transform: translateX(-50%);
}

.kid {
  position: absolute;
  left: 28%;
  bottom: 92px;
  width: 104px;
  height: 178px;
  transform-origin: 50% 100%;
}

.kid,
.ball,
.club,
.chest-dot,
.arm,
.leg,
.eye-beam {
  transition: transform 0.45s ease, opacity 0.35s ease, left 0.45s ease, bottom 0.45s ease;
}

.kid::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #ffd0a9;
}

.kid::after {
  content: "";
  position: absolute;
  left: 24px;
  top: 42px;
  width: 56px;
  height: 76px;
  border-radius: 24px 24px 14px 14px;
  background: #ffffff;
  border: 8px solid var(--blue);
}

.arm {
  position: absolute;
  top: 68px;
  width: 44px;
  height: 8px;
  border-radius: 999px;
  background: #ffd0a9;
  transform-origin: left center;
  z-index: 2;
}

.arm-front {
  left: 72px;
  transform: rotate(25deg);
}

.arm-back {
  left: 28px;
  transform: rotate(150deg);
}

.leg {
  position: absolute;
  top: 116px;
  width: 9px;
  height: 66px;
  border-radius: 999px;
  background: #225a4b;
  transform-origin: top center;
}

.leg-left {
  left: 38px;
  transform: rotate(8deg);
}

.leg-right {
  left: 64px;
  transform: rotate(-8deg);
}

.eye-beam {
  position: absolute;
  left: 62px;
  top: 16px;
  width: 132px;
  height: 18px;
  border-radius: 999px;
  background: rgba(249, 248, 113, 0.7);
  opacity: 0;
}

.chest-dot {
  position: absolute;
  left: 49px;
  top: 76px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 0 7px rgba(249, 248, 113, 0.28);
  opacity: 0;
  z-index: 3;
}

.club {
  position: absolute;
  left: 82px;
  top: 74px;
  width: 8px;
  height: 144px;
  border-radius: 999px;
  background: #25373d;
  transform-origin: 5px 18px;
  transform: rotate(52deg);
}

.club::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -5px;
  width: 33px;
  height: 12px;
  border-radius: 9px;
  background: #25373d;
}

.practice-visual.playing .club {
  animation: swing 1.9s ease-in-out infinite;
}

.practice-visual.playing .ball {
  animation: ball-roll 1.9s ease-in-out infinite;
}

.top-marker {
  position: absolute;
  left: 31%;
  top: 92px;
  width: 80px;
  height: 80px;
  border: 5px dashed var(--coral);
  border-radius: 50%;
  opacity: 0;
}

.hold-count {
  position: absolute;
  right: 18px;
  top: 112px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--sun);
  color: var(--ink);
  font-size: 1.8rem;
  font-weight: 950;
  opacity: 0;
}

.wrong-mark {
  position: absolute;
  right: 26px;
  top: 94px;
  width: 80px;
  height: 80px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 127, 110, 0.9);
  color: white;
  font-size: 4rem;
  font-weight: 950;
  opacity: 0;
}

.look-target .eye-beam,
.target-pick .eye-beam {
  opacity: 1;
  transform: rotate(-17deg);
}

.look-ball .eye-beam,
.prepare-hit .eye-beam {
  opacity: 1;
  width: 82px;
  transform: translate(32px, 82px) rotate(32deg);
}

.look-ball .target,
.target-pick .target,
.target-start .target,
.direction-good .target,
.retry-target .target {
  background: var(--sun);
}

.small-swing .club,
.impact-forward .club,
.target-start .club,
.slow-through .club {
  transform: rotate(18deg);
}

.full-demo .club,
.full-replay .club {
  animation: swing 1.9s ease-in-out infinite;
}

.small-swing .ball,
.target-start .ball,
.impact-forward .ball,
.direction-good .ball,
.forward-path .ball {
  transform: translate(132px, -34px);
}

.forward-path .flight-path,
.direction-good .flight-path,
.target-start .direction-arrow,
.retry-target .direction-arrow,
.send-through .direction-arrow,
.finish-send .direction-arrow {
  opacity: 1;
}

.finish-success .kid,
.finish-send .kid,
.stable-finish .kid,
.waist-finish .kid,
.chest-finish .kid,
.full-finish .kid,
.full-replay .kid {
  transform: translateX(24px) rotate(8deg);
}

.finish-success .club,
.finish-send .club,
.stable-finish .club,
.full-finish .club,
.full-replay .club {
  transform: rotate(118deg);
}

.show-feet .footprint,
.feet-set .footprint,
.address .footprint,
.stable-athlete .footprint,
.feet-after-hit .footprint,
.feet-reset .footprint {
  opacity: 1;
}

.feet-set .leg-left,
.address .leg-left,
.stable-athlete .leg-left,
.feet-after-hit .leg-left,
.feet-reset .leg-left {
  transform: translateX(-12px) rotate(4deg);
}

.feet-set .leg-right,
.address .leg-right,
.stable-athlete .leg-right,
.feet-after-hit .leg-right,
.feet-reset .leg-right {
  transform: translateX(12px) rotate(-4deg);
}

.stable-athlete .kid,
.feet-after-hit .kid {
  transform: scale(1.02);
}

.feet-after-hit .club {
  transform: rotate(104deg);
}

.no-ball-send .ball {
  opacity: 0;
}

.no-ball-send .direction-arrow,
.club-to-ball .direction-arrow,
.send-through .direction-arrow {
  opacity: 1;
}

.club-to-ball .club {
  transform: rotate(24deg);
}

.send-through .club,
.front-waist .club,
.through-ball .club,
.chest-to-target .club {
  transform: rotate(92deg);
}

.wrong-stop .wrong-mark,
.wrong-step .wrong-mark,
.wrong-direction .wrong-mark,
.wrong-big .wrong-mark,
.wrong-hands .wrong-mark {
  opacity: 1;
}

.wrong-stop .club {
  transform: rotate(-10deg);
}

.finish-hold .club,
.count-three .club {
  transform: rotate(112deg);
}

.finish-hold .kid,
.count-three .kid {
  transform: translateX(18px);
}

.count-three .hold-count,
.stable-finish .hold-count,
.full-finish .hold-count {
  opacity: 1;
}

.reset-ball .ball {
  transform: translateX(-50%);
}

.wrong-step .kid {
  transform: translate(74px, 0) rotate(10deg);
}

.wrong-direction .ball {
  transform: translate(120px, 58px);
}

.waist-lines .waist-line,
.back-waist .waist-line,
.front-waist .waist-line,
.waist-finish .waist-line {
  opacity: 1;
}

.back-waist .club {
  transform: rotate(-64deg);
}

.front-waist .club,
.waist-finish .club {
  transform: rotate(82deg);
}

.wrong-big .club {
  transform: rotate(-118deg);
}

.chest-ready .chest-dot,
.chest-turn .chest-dot,
.chest-to-target .chest-dot,
.wrong-hands .chest-dot,
.chest-finish .chest-dot {
  opacity: 1;
}

.chest-turn .kid,
.chest-to-target .kid,
.chest-finish .kid {
  transform: translateX(20px) rotate(12deg);
}

.wrong-hands .club {
  transform: rotate(118deg);
}

.wrong-hands .kid {
  transform: none;
}

.top-point .top-marker {
  opacity: 1;
}

.top-point .club {
  transform: rotate(-112deg);
}

.full-replay .top-marker,
.full-replay .flight-path {
  opacity: 1;
}

@keyframes swing {
  0%, 100% { transform: rotate(52deg); }
  36% { transform: rotate(-48deg); }
  58% { transform: rotate(72deg); }
}

@keyframes ball-roll {
  0%, 45% { transform: translateX(-50%); }
  75%, 100% { transform: translate(128px, -36px); }
}

.scene-caption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  max-width: calc(100% - 36px);
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  font-size: clamp(1.25rem, 4vw, 2rem);
  font-weight: 950;
}

.scene-notes {
  display: grid;
  gap: 10px;
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.scene-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.episode-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.episode-button {
  min-height: 94px;
  padding: 14px;
  border-radius: 8px;
  text-align: left;
  background: var(--surface);
  border: 2px solid var(--line);
}

.episode-button.active {
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 127, 110, 0.18);
}

.episode-number {
  display: block;
  margin-bottom: 5px;
  color: var(--blue);
  font-weight: 950;
}

.episode-title {
  display: block;
  font-weight: 900;
  line-height: 1.25;
}

.parent-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.parent-panel,
.video-panel,
.episode-panel,
.setup-panel {
  padding: 18px;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
  color: var(--muted);
  font-weight: 800;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  padding: 12px;
}

.field textarea {
  min-height: 88px;
  resize: vertical;
}

.record-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.record-item {
  padding: 12px;
  border-radius: 8px;
  background: #f3ffef;
  border: 1px solid #cceec3;
}

.record-item strong {
  display: block;
  margin-bottom: 4px;
}

.setup-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.hand-option {
  min-height: 84px;
  border-radius: 8px;
  background: #ffffff;
  border: 2px solid var(--line);
  font-weight: 950;
}

.hand-option.active {
  border-color: var(--blue);
  background: #eaf6ff;
}

.grip-card {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 14px;
  padding: 14px;
  border-radius: 8px;
  background: #fffbe1;
}

.grip-figure {
  position: relative;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background: var(--sky);
}

.grip-figure::before,
.grip-figure::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #ffd0a9;
  top: 32px;
}

.grip-figure::before {
  left: 20px;
}

.grip-figure::after {
  right: 20px;
}

.grip-stick {
  position: absolute;
  left: 18px;
  top: 44px;
  width: 58px;
  height: 8px;
  border-radius: 999px;
  background: #25373d;
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.video-box {
  min-height: 230px;
  border-radius: 8px;
  overflow: hidden;
  background: #ebfaf3;
  border: 2px dashed #9fdbc2;
}

.video-box video,
.video-box .demo-compare {
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
}

.demo-compare {
  display: grid;
  place-items: center;
  padding: 12px;
}

.video-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0;
}

.file-label {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  padding: 0 16px;
  border-radius: 999px;
  background: white;
  border: 2px solid var(--line);
  font-weight: 900;
  cursor: pointer;
}

.file-label input {
  display: none;
}

.safety {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 18px;
  background: linear-gradient(180deg, #f4fff8 0%, #fff9d7 100%);
}

.safety-card {
  width: min(680px, 100%);
  padding: clamp(20px, 5vw, 38px);
  border-radius: 8px;
  background: white;
  box-shadow: var(--shadow);
}

.safety-visual {
  position: relative;
  height: 220px;
  overflow: hidden;
  border-radius: 8px;
  background: linear-gradient(180deg, var(--sky) 0 55%, #73e491 55%);
  margin-bottom: 16px;
}

.walking-person,
.safe-kid {
  position: absolute;
  bottom: 46px;
  width: 42px;
  height: 86px;
  border-radius: 22px 22px 12px 12px;
}

.walking-person {
  right: 20%;
  background: var(--coral);
}

.safe-kid {
  left: 18%;
  background: var(--blue);
}

.lowered-club {
  position: absolute;
  left: calc(18% + 32px);
  bottom: 52px;
  width: 108px;
  height: 8px;
  border-radius: 999px;
  background: var(--ink);
  transform: rotate(12deg);
}

.hidden {
  display: none !important;
}

.notice {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

@media (max-width: 820px) {
  .hero,
  .parent-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .episode-list {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .nav button {
    flex: 0 0 auto;
  }

  .practice-visual {
    min-height: 320px;
  }
}

@media (max-width: 520px) {
  .app-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

  .setup-options {
    grid-template-columns: 1fr;
  }

  .grip-card {
    grid-template-columns: 1fr;
  }

  .kid {
    left: 20%;
  }

  .target {
    right: 16%;
  }
}