:root {
  --kp-navy-950: #071126;
  --kp-navy-900: #0b1730;
  --kp-navy-800: #102344;
  --kp-blue: #2f80ff;
  --kp-cyan: #3fd7ff;
  --kp-purple: #8b5cf6;
  --kp-pink: #f45d9c;
  --kp-green: #40d78a;
  --kp-yellow: #ffd45a;
  --kp-ink: #081633;
  --kp-muted: #52627d;
  --kp-bg: #f7fbff;
  --kp-line: rgba(12, 30, 68, .12);
  --kp-shadow: 0 18px 50px rgba(10, 22, 50, .13);
  --kp-radius: 8px;
}

* { box-sizing: border-box; }

body.kp-redesign {
  margin: 0;
  color: var(--kp-ink);
  background:
    linear-gradient(180deg, #ffffff 0%, #f5f9ff 45%, #eef6ff 100%);
  font-family: "Yu Gothic UI", "Yu Gothic", Meiryo, "Hiragino Kaku Gothic ProN", sans-serif;
}

.kp-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.kp-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .88);
  border-bottom: 1px solid rgba(11, 23, 48, .08);
  backdrop-filter: blur(16px);
}

.kp-header-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.kp-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--kp-navy-950);
  text-decoration: none;
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
}

.kp-brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: block;
  overflow: hidden;
  background: var(--kp-navy-900);
  box-shadow: 0 10px 20px rgba(8, 19, 44, .15);
}

.kp-brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kp-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  font-weight: 900;
}

.kp-nav a {
  color: var(--kp-navy-900);
  text-decoration: none;
}

.kp-nav a.is-active {
  color: var(--kp-blue);
}

.kp-lang {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 10px;
  border: 1px solid rgba(11, 23, 48, .12);
  border-radius: 8px;
  background: #fff;
}

.kp-lang label {
  font-size: 11px;
  font-weight: 900;
  color: var(--kp-muted);
}

.kp-lang select {
  border: 0;
  background: transparent;
  color: var(--kp-navy-950);
  font-weight: 900;
  max-width: 150px;
}

.kp-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 8px;
  border: 0;
  background: linear-gradient(180deg, #233bff, #1726a9);
  color: #fff;
  font-weight: 900;
  line-height: 1.1;
  text-decoration: none;
  box-shadow: 0 12px 24px rgba(47, 80, 255, .24), inset 0 -3px 0 rgba(0, 0, 0, .2);
}

.kp-button.secondary {
  background: #fff;
  color: var(--kp-navy-900);
  border: 1px solid rgba(11, 23, 48, .14);
  box-shadow: 0 10px 18px rgba(10, 22, 50, .08);
}

.kp-cta-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, .38);
  background: rgba(255, 255, 255, .18);
  color: #fff;
  font-weight: 950;
  line-height: 1.1;
}

.kp-hero {
  position: relative;
  min-height: calc(86svh - 74px);
  display: grid;
  align-items: center;
  padding: 44px 0 34px;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(7, 17, 38, .88) 0%, rgba(7, 17, 38, .70) 42%, rgba(7, 17, 38, .28) 100%),
    url('/assets/brand/kidspiano-app-hero-bg-v2.png') center / cover no-repeat;
}

.kp-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 92px;
  background: linear-gradient(180deg, rgba(247, 251, 255, 0), #fff);
  pointer-events: none;
}

.kp-hero-grid {
  display: grid;
  position: relative;
  z-index: 1;
  grid-template-columns: minmax(0, 680px);
  gap: 34px;
  align-items: center;
}

.kp-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: rgba(255, 255, 255, .84);
  font-size: 13px;
  font-weight: 900;
}

.kp-hero h1 {
  margin: 0;
  max-width: 680px;
  color: #fff;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 900;
  text-shadow: 0 14px 36px rgba(0, 0, 0, .32);
  -webkit-text-stroke: 0;
}

.kp-gradient-word {
  color: transparent;
  background: linear-gradient(90deg, var(--kp-pink), var(--kp-cyan), var(--kp-yellow));
  -webkit-background-clip: text;
  background-clip: text;
}

.kp-hero-lead {
  margin: 18px 0 0;
  max-width: 620px;
  color: rgba(255, 255, 255, .86);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.75;
  font-weight: 800;
}

.kp-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.kp-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}

.kp-metric {
  padding: 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .20);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .16);
  backdrop-filter: blur(14px);
}

.kp-metric strong {
  display: block;
  color: #fff;
  font-size: 22px;
  line-height: 1;
}

.kp-metric span {
  display: block;
  margin-top: 5px;
  color: rgba(255, 255, 255, .74);
  font-size: 12px;
  font-weight: 800;
}

.kp-hero-media {
  display: none;
}

.kp-hero-media img {
  display: block;
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 24px 60px rgba(8, 19, 44, .18);
}

.kp-coming-soon-page {
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 48%, #eef6ff 100%);
}

.kp-coming-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(7, 17, 38, .91), rgba(7, 17, 38, .72) 44%, rgba(7, 17, 38, .32)),
    url('/assets/brand/kidspiano-app-hero-bg-v2.png') center / cover no-repeat;
}

.kp-coming-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 76px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), #fff);
  pointer-events: none;
}

.kp-coming-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(320px, .85fr);
  gap: 28px;
  align-items: center;
}

.kp-coming-hero h1 {
  margin: 0;
  max-width: 700px;
  color: #fff;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.06;
  letter-spacing: 0;
  text-shadow: 0 14px 36px rgba(0, 0, 0, .32);
}

.kp-coming-preview {
  padding: 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .20);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .22);
  backdrop-filter: blur(14px);
}

.kp-coming-preview img {
  display: block;
  width: 100%;
  border-radius: 8px;
}

.kp-beta-section {
  padding-top: 48px;
}

.kp-beta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .78fr);
  gap: 20px;
  align-items: start;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--kp-line);
  background: #fff;
  box-shadow: var(--kp-shadow);
}

.kp-beta-points {
  margin-top: 18px;
}

.kp-beta-form {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 8px;
  background: #f5f8ff;
  border: 1px solid var(--kp-line);
}

.kp-beta-form label {
  display: grid;
  gap: 6px;
  color: var(--kp-navy-900);
  font-size: 13px;
  font-weight: 900;
}

.kp-beta-form input,
.kp-beta-form select,
.kp-beta-form textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid rgba(12, 30, 68, .18);
  border-radius: 8px;
  background: #fff;
  color: var(--kp-ink);
  font: inherit;
  font-size: 15px;
  font-weight: 750;
  line-height: 1.5;
  padding: 10px 12px;
}

.kp-beta-form textarea {
  resize: vertical;
}

.kp-beta-form input:focus,
.kp-beta-form select:focus,
.kp-beta-form textarea:focus {
  outline: 3px solid rgba(47, 128, 255, .18);
  border-color: rgba(47, 128, 255, .72);
}

.kp-beta-consent {
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px !important;
  color: var(--kp-muted) !important;
  font-size: 13px !important;
  line-height: 1.7;
}

.kp-beta-consent input {
  width: 18px;
  min-height: 18px;
  height: 18px;
  margin-top: 3px;
  padding: 0;
}

.kp-hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.kp-form-message {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.6;
}

.kp-form-message p {
  margin: 0;
}

.kp-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.kp-form-actions .kp-button {
  min-height: 42px;
  padding: 10px 14px;
  font-size: 13px;
}

.kp-beta-pending {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 8px;
  border: 1px solid rgba(12, 30, 68, .12);
  background: #e9edf5;
  color: var(--kp-muted);
  font-size: 15px;
  font-weight: 950;
}

.kp-form-message.success {
  color: #064e3b;
  background: #dff7e8;
}

.kp-form-message.error {
  color: #7f1d1d;
  background: #fee2e2;
}

.kp-section {
  padding: 72px 0;
}

.kp-section.dark {
  color: #fff;
  background:
    radial-gradient(circle at 12% 10%, rgba(63, 215, 255, .16), transparent 36%),
    radial-gradient(circle at 85% 25%, rgba(139, 92, 246, .18), transparent 34%),
    linear-gradient(180deg, var(--kp-navy-950), var(--kp-navy-900));
}

.kp-section-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.kp-section h2,
.kp-section-title {
  margin: 0;
  color: inherit;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: 0;
}

.kp-section-copy {
  margin: 10px 0 0;
  max-width: 760px;
  color: var(--kp-muted);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 750;
}

.dark .kp-section-copy { color: rgba(255, 255, 255, .78); }

.kp-status-label {
  display: inline-flex;
  align-items: center;
  margin: 0 0 12px;
  min-height: 32px;
  padding: 7px 12px;
  border-radius: 999px;
  color: #06351c;
  background: #dff7e8;
  font-size: 12px;
  font-weight: 900;
}

.kp-app-dev-section {
  padding-top: 42px;
}

.kp-app-dev-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(320px, 1.05fr);
  gap: 18px;
  align-items: stretch;
}

.kp-app-dev-copy,
.kp-dev-preview {
  border-radius: 8px;
  border: 1px solid var(--kp-line);
  background: #fff;
  box-shadow: var(--kp-shadow);
}

.kp-app-dev-copy {
  padding: 20px;
}

.kp-dev-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.kp-dev-list li {
  padding: 13px 14px;
  border-left: 5px solid var(--kp-blue);
  border-radius: 8px;
  color: var(--kp-navy-900);
  background: #f4f8ff;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.65;
}

.kp-dev-preview {
  overflow: hidden;
  padding: 0;
}

.kp-dev-preview img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

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

.kp-card {
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--kp-line);
  box-shadow: var(--kp-shadow);
  padding: 18px;
}

.kp-card h3 {
  margin: 10px 0 6px;
  color: var(--kp-navy-950);
  font-size: 20px;
  line-height: 1.3;
  font-weight: 900;
}

.kp-card p {
  margin: 0;
  color: var(--kp-muted);
  font-size: 14px;
  line-height: 1.7;
  font-weight: 750;
}

.kp-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(63, 215, 255, .2), rgba(139, 92, 246, .18));
  font-size: 23px;
}

.kp-feature-icon {
  display: block;
  width: 58px;
  height: 58px;
  overflow: hidden;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  box-shadow: 0 12px 24px rgba(8, 19, 44, .14);
}

.kp-feature-icon.note { background-image: url('/assets/brand/feature-note-reading.webp'); }
.kp-feature-icon.rhythm { background-image: url('/assets/brand/feature-rhythm.webp'); }
.kp-feature-icon.ear { background-image: url('/assets/brand/feature-ear.webp'); }
.kp-feature-icon.keyboard { background-image: url('/assets/brand/feature-keyboard.webp'); }
.kp-feature-icon.progress { background-image: url('/assets/brand/feature-progress.webp'); }
.kp-feature-icon.unlock { background-image: url('/assets/brand/feature-unlock.webp'); }

.kp-midi-section {
  background: linear-gradient(180deg, #fff, #f6fbff);
}

.kp-midi-article {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(360px, 1.1fr);
  gap: 24px;
  align-items: center;
}

.kp-midi-copy {
  max-width: 620px;
}

.kp-midi-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.kp-midi-points span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 12px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--kp-line);
  color: var(--kp-navy-900);
  font-size: 13px;
  font-weight: 950;
  box-shadow: 0 8px 22px rgba(12, 30, 68, .08);
}

.kp-midi-image {
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid var(--kp-line);
  box-shadow: var(--kp-shadow);
  background: #fff;
}

.kp-midi-image img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.kp-game-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: 22px;
  align-items: start;
}

.kp-app {
  border-radius: 8px;
  background:
    radial-gradient(circle at 50% 20%, rgba(63, 215, 255, .17), transparent 32%),
    linear-gradient(180deg, #0b1730, #071126);
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .32);
  padding: clamp(14px, 2.4vw, 24px);
  color: #fff;
}

.kp-app-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
}

.kp-app-title { font-weight: 900; }
.kp-progress {
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  overflow: hidden;
}
.kp-progress span {
  display: block;
  width: 30%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--kp-green), var(--kp-cyan));
}

.kp-app-stats {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 26px 0 10px;
  font-weight: 900;
}

.kp-combo strong,
.kp-score strong {
  display: block;
  margin-top: 2px;
  font-size: 34px;
  line-height: 1;
}

.kp-combo span { color: var(--kp-yellow); }
.kp-score span { color: rgba(255, 255, 255, .78); }

.kp-play {
  width: 118px;
  height: 118px;
  margin: 6px auto 16px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: radial-gradient(circle, #4468ff 0 48%, #2633a2 49% 68%, rgba(63, 215, 255, .22) 69%);
  box-shadow: 0 0 0 10px rgba(139, 92, 246, .18), 0 0 34px rgba(63, 215, 255, .28);
  font-size: 42px;
}

.kp-question {
  margin: 0 0 14px;
  text-align: center;
  font-size: 22px;
  font-weight: 900;
}

.kp-note-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.kp-note-card {
  min-height: 132px;
  border: 2px solid rgba(255, 255, 255, .18);
  border-radius: 8px;
  background: rgba(255, 255, 255, .95);
  color: var(--kp-navy-950);
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 8px;
  font-weight: 900;
  box-shadow: inset 0 -4px 0 rgba(8, 22, 51, .08);
}

.kp-staff {
  width: 74px;
  height: 42px;
  background:
    linear-gradient(#c9cfda 1px, transparent 1px) 0 5px / 100% 8px repeat-y;
  position: relative;
}
.kp-staff::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 12px;
  left: 24px;
  top: 18px;
  border-radius: 50%;
  background: #071126;
  transform: rotate(-15deg);
}
.kp-note-name {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--kp-cyan);
}
.kp-note-card.correct {
  border-color: var(--kp-green);
  box-shadow: 0 0 0 4px rgba(64, 215, 138, .24), inset 0 -4px 0 rgba(8, 22, 51, .08);
}

.kp-app-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-top: 16px;
}
.kp-hearts { color: var(--kp-pink); letter-spacing: 2px; }
.kp-level {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  font-size: 13px;
  font-weight: 900;
}

.kp-side-stack {
  display: grid;
  gap: 12px;
}

.kp-mini-card {
  border-radius: 8px;
  padding: 16px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .12);
}
.kp-mini-card strong {
  display: block;
  font-size: 20px;
  margin-bottom: 7px;
}
.kp-mini-card p {
  margin: 0;
  color: rgba(255, 255, 255, .76);
  line-height: 1.7;
  font-weight: 750;
}

.kp-map {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}
.kp-node {
  min-height: 128px;
  border-radius: 8px;
  padding: 14px;
  color: #fff;
  background: linear-gradient(180deg, #143064, #0d1d3c);
  border: 1px solid rgba(255, 255, 255, .12);
  display: grid;
  align-content: space-between;
}
.kp-node:nth-child(2n) { transform: translateY(24px); }
.kp-node.locked { opacity: .58; }
.kp-node-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, var(--kp-green), #18a568);
  font-weight: 900;
}
.kp-node-title { font-weight: 900; }
.kp-stars { color: var(--kp-yellow); font-weight: 900; }

.kp-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.kp-image-card {
  overflow: hidden;
  padding: 0;
}
.kp-image-card img {
  display: block;
  width: 100%;
  height: auto;
}

.kp-footer-redesign,
.kp-site-footer {
  margin-top: 0;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding: 24px 0 36px;
  background: var(--kp-navy-950);
  color: rgba(255, 255, 255, .78);
  text-align: center;
}

.kp-footer-redesign a,
.kp-site-footer a { color: #fff; }

.kp-site-footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 14px;
  font-size: 13px;
  font-weight: 850;
  line-height: 1.6;
}

.kp-site-disclosure {
  padding: 10px 16px 18px;
  background: var(--kp-navy-950);
  color: rgba(255, 255, 255, .62);
  text-align: center;
  font-size: 11px;
  font-weight: 650;
  line-height: 1.6;
}

.kp-site-disclosure a {
  color: #fff;
}

.legal-footer,
.site-disclosure {
  border-radius: 8px !important;
}

.kp-redesign:not(.kp-content-page):not(.kp-practice-page) .wrap {
  display: block;
  min-height: 0;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0;
}

.kp-redesign:not(.kp-content-page):not(.kp-practice-page) .card {
  width: 100%;
  padding: 0;
  text-align: left;
}

.kp-redesign:not(.kp-content-page):not(.kp-practice-page) .wrap > .card > .topbar,
.kp-redesign:not(.kp-content-page):not(.kp-practice-page) .wrap > .card > .hero,
.kp-redesign:not(.kp-content-page):not(.kp-practice-page) .wrap > .card > h1,
.kp-redesign:not(.kp-content-page):not(.kp-practice-page) .wrap > .card > .lead {
  display: none;
}

.kp-redesign .dev-tools {
  margin: 0;
  max-width: none;
}

.kp-redesign .menu-group {
  padding: 56px 0;
}

.kp-redesign .menu-subtitle {
  width: auto;
  max-width: none;
  margin: 0 0 20px;
  padding: 0;
  color: var(--kp-navy-950);
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  text-align: left;
  font-family: inherit;
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: 0;
  text-shadow: none;
  -webkit-text-stroke: 0;
}

.kp-redesign .menu-subtitle::before,
.kp-redesign .menu-subtitle::after {
  display: none;
}

.kp-redesign .intro-panel,
.kp-redesign .practice-panel,
.kp-redesign .affiliate-panel {
  border-radius: 8px;
  border: 1px solid var(--kp-line);
  background: #fff;
  box-shadow: var(--kp-shadow);
  padding: 20px;
}

.kp-redesign .dev-menu,
.kp-redesign .download-menu {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.kp-redesign .dev-button,
.kp-redesign .download-button,
.kp-redesign .practice-link-btn {
  border-radius: 8px;
  border: 0;
  min-height: 86px;
}

.kp-redesign .dev-button,
.kp-redesign .download-button {
  position: relative;
  display: grid;
  align-content: end;
  gap: 8px;
  min-height: 136px;
  padding: 18px;
  overflow: hidden;
  color: #fff;
  text-align: left;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 8px;
  background:
    radial-gradient(circle at 16% 14%, rgba(63, 215, 255, .28), transparent 28%),
    radial-gradient(circle at 86% 18%, rgba(139, 92, 246, .24), transparent 30%),
    linear-gradient(145deg, #08142d, #132a55 64%, #0a1732) !important;
  box-shadow:
    0 18px 40px rgba(8, 19, 44, .18),
    inset 0 -4px 0 rgba(0, 0, 0, .22);
  isolation: isolate;
}

.kp-redesign .dev-button::before,
.kp-redesign .download-button::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 14px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .22), rgba(255, 255, 255, .08));
  color: #fff;
  font-size: 20px;
  font-weight: 900;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, .18);
  z-index: 0;
}

.kp-redesign .dev-button::after,
.kp-redesign .download-button::after {
  position: absolute;
  top: 16px;
  right: 14px;
  min-height: 26px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .86);
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .12);
}

.kp-redesign .dev-button .button-main,
.kp-redesign .download-button .button-main {
  position: relative;
  display: block;
  margin-top: 52px;
  color: #fff;
  font-size: clamp(20px, 2.2vw, 27px);
  line-height: 1.18;
  letter-spacing: 0;
  text-shadow: none;
  z-index: 1;
}

.kp-redesign .dev-button .button-sub,
.kp-redesign .download-button .button-sub {
  position: relative;
  display: block;
  max-width: 17em;
  margin: 0;
  color: rgba(255, 255, 255, .76);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: 0;
  opacity: 1;
  text-shadow: none;
  z-index: 1;
}

.kp-redesign .dev-button:hover,
.kp-redesign .download-button:hover {
  transform: translateY(-3px);
  filter: saturate(1.08);
  box-shadow:
    0 22px 48px rgba(8, 19, 44, .23),
    inset 0 -4px 0 rgba(0, 0, 0, .24);
}

.kp-redesign .dev-button:nth-child(1)::before { content: "鍵"; color: #08142d; background: linear-gradient(180deg, #ffffff, #cfe9ff); }
.kp-redesign .dev-button:nth-child(2)::before { content: "♪"; background: linear-gradient(180deg, var(--kp-green), #1fae68); }
.kp-redesign .dev-button:nth-child(3)::before { content: "譜"; color: #08142d; background: linear-gradient(180deg, #ffffff, #dff6ff); }
.kp-redesign .dev-button:nth-child(4)::before { content: "♩"; color: #08142d; background: linear-gradient(180deg, var(--kp-yellow), #ffae36); }
.kp-redesign .dev-button:nth-child(5)::before { content: "♬"; background: linear-gradient(180deg, var(--kp-purple), #5b49d8); }
.kp-redesign .dev-button:nth-child(6)::before { content: "#"; background: linear-gradient(180deg, var(--kp-cyan), #2f80ff); }

.kp-redesign .dev-button:nth-child(1)::after { content: "LV 1"; }
.kp-redesign .dev-button:nth-child(2)::after { content: "★★★ COMBO"; background: rgba(64, 215, 138, .2); color: #dfffea; }
.kp-redesign .dev-button:nth-child(3)::after { content: "READ"; }
.kp-redesign .dev-button:nth-child(4)::after { content: "BEAT"; }
.kp-redesign .dev-button:nth-child(5)::after { content: "UNLOCK"; }
.kp-redesign .dev-button:nth-child(6)::after { content: "KEY"; }

.kp-redesign .dev-button:nth-child(2) {
  border-color: rgba(64, 215, 138, .58);
  background:
    radial-gradient(circle at 18% 18%, rgba(64, 215, 138, .34), transparent 30%),
    radial-gradient(circle at 82% 22%, rgba(63, 215, 255, .26), transparent 32%),
    linear-gradient(145deg, #08142d, #132f55 58%, #082238) !important;
}

.kp-redesign .download-button {
  min-height: 124px;
  color: var(--kp-navy-950);
  border-color: rgba(12, 30, 68, .1);
  background:
    radial-gradient(circle at 16% 8%, rgba(63, 215, 255, .16), transparent 30%),
    linear-gradient(180deg, #ffffff, #f3f8ff) !important;
  box-shadow: 0 14px 34px rgba(10, 22, 50, .11);
}

.kp-redesign .download-button .button-main {
  color: var(--kp-navy-950);
}

.kp-redesign .download-button .button-sub {
  color: var(--kp-muted);
}

.kp-redesign .download-button::after {
  background: rgba(8, 22, 51, .06);
  color: var(--kp-navy-900);
  box-shadow: inset 0 0 0 1px rgba(8, 22, 51, .07);
}

.kp-redesign .download-button:nth-child(1)::before { content: "✎"; background: linear-gradient(180deg, var(--kp-cyan), #2f80ff); }
.kp-redesign .download-button:nth-child(2)::before { content: "♪"; background: linear-gradient(180deg, var(--kp-pink), #d83d87); }
.kp-redesign .download-button:nth-child(3)::before { content: "C"; background: linear-gradient(180deg, var(--kp-purple), #5b49d8); }
.kp-redesign .download-button:nth-child(4)::before { content: "#"; background: linear-gradient(180deg, var(--kp-green), #23b56c); }
.kp-redesign .download-button:nth-child(5)::before { content: "♩"; color: #08142d; background: linear-gradient(180deg, var(--kp-yellow), #ffae36); }
.kp-redesign .download-button:nth-child(6)::before { content: "ド"; background: linear-gradient(180deg, #3fd7ff, #5b7cff); }

.kp-redesign .download-button:nth-child(1)::after { content: "WRITE"; }
.kp-redesign .download-button:nth-child(2)::after { content: "PDF"; }
.kp-redesign .download-button:nth-child(3)::after { content: "45枚"; }
.kp-redesign .download-button:nth-child(4)::after { content: "15種"; }
.kp-redesign .download-button:nth-child(5)::after { content: "BEAT"; }
.kp-redesign .download-button:nth-child(6)::after { content: "FREE"; }

.kp-redesign .practice-card,
.kp-redesign .affiliate-card {
  border-radius: 8px;
}

.kp-practice-page {
  background:
    radial-gradient(circle at 8% 0%, rgba(63, 215, 255, .16), transparent 30%),
    linear-gradient(180deg, #ffffff, #eef6ff);
}

.kp-practice-page .wrap,
.kp-content-page .wrap {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 42px;
}

.kp-practice-page .panel,
.kp-content-page .card,
.kp-content-page .panel {
  border-radius: 8px !important;
  border: 1px solid var(--kp-line) !important;
  background: rgba(255, 255, 255, .96) !important;
  box-shadow: var(--kp-shadow) !important;
}

.kp-practice-page h1,
.kp-content-page h1 {
  color: var(--kp-navy-950) !important;
  font-family: "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif !important;
  letter-spacing: 0 !important;
  text-shadow: none !important;
  -webkit-text-stroke: 0 !important;
}

.kp-practice-page .level-tab,
.kp-practice-page .song,
.kp-content-page .asset-card,
.kp-content-page .download-card {
  border-radius: 8px !important;
}

.kp-practice-page .btn,
.kp-content-page .btn,
.kp-content-page .button,
.kp-content-page button {
  border-radius: 8px !important;
}

.kp-practice-detail-page {
  color: var(--kp-ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(63, 215, 255, .16), transparent 32%),
    radial-gradient(circle at 92% 12%, rgba(139, 92, 246, .15), transparent 34%),
    linear-gradient(180deg, #ffffff, #eef6ff);
}

.kp-practice-detail-page .wrap {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 40px;
}

.kp-practice-detail-page .topbar {
  justify-content: flex-end;
}

.kp-practice-detail-page .panel {
  border-radius: 8px !important;
  border: 1px solid var(--kp-line) !important;
  background: rgba(255, 255, 255, .96) !important;
  box-shadow: var(--kp-shadow) !important;
}

.kp-practice-detail-page .page-topbar {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .98), rgba(246, 250, 255, .96)) !important;
}

.kp-practice-detail-page .video-panel {
  padding: 0 !important;
  overflow: hidden;
  background:
    radial-gradient(circle at 72% 0%, rgba(63, 215, 255, .13), transparent 34%),
    linear-gradient(180deg, var(--kp-navy-900), var(--kp-navy-950)) !important;
  color: #fff;
}

.kp-practice-detail-page .video-panel h1,
.kp-practice-detail-page .video-panel .meta,
.kp-practice-detail-page .video-panel .level-info {
  color: #fff !important;
}

.kp-practice-detail-page h1,
.kp-practice-detail-page h2,
.kp-practice-detail-page h3 {
  font-family: "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif !important;
  letter-spacing: 0 !important;
  text-shadow: none !important;
  -webkit-text-stroke: 0 !important;
}

.kp-practice-detail-page .hero-topline .badge {
  border-radius: 999px !important;
  border: 1px solid rgba(255, 255, 255, .15) !important;
  background: rgba(255, 255, 255, .1) !important;
  color: #fff !important;
}

.kp-practice-detail-page .sheet-download-card,
.kp-practice-detail-page .song-meta-box,
.kp-practice-detail-page .keyboard-box,
.kp-practice-detail-page .desc-toggle,
.kp-practice-detail-page .score-page,
.kp-practice-detail-page .upnext-list,
.kp-practice-detail-page .upnext-thumb {
  border-radius: 8px !important;
}

.kp-practice-detail-page .sheet-download-card {
  background:
    linear-gradient(180deg, rgba(64, 215, 138, .14), rgba(255, 255, 255, .08)) !important;
  border-color: rgba(64, 215, 138, .3) !important;
}

.kp-practice-detail-page .sheet-download-title,
.kp-practice-detail-page .sheet-download-note {
  color: #fff !important;
}

.kp-practice-detail-page .btn,
.kp-practice-detail-page .score-nav button {
  border-radius: 8px !important;
}

.kp-practice-detail-page .btn {
  background: linear-gradient(180deg, #233bff, #1726a9) !important;
  border-color: transparent !important;
  box-shadow: 0 12px 24px rgba(47, 80, 255, .22), inset 0 -3px 0 rgba(0, 0, 0, .18) !important;
}

.kp-practice-detail-page .btn.sheet {
  background: linear-gradient(180deg, var(--kp-green), #18a568) !important;
}

.kp-practice-detail-page .btn.sub {
  background: rgba(255, 255, 255, .12) !important;
  border: 1px solid rgba(255, 255, 255, .14) !important;
  color: #fff !important;
  box-shadow: none !important;
}

.kp-practice-detail-page .content-panel .btn.sub,
.kp-practice-detail-page .score-panel .btn.sub,
.kp-practice-detail-page .page-topbar .btn.sub {
  color: var(--kp-navy-900) !important;
  background: #fff !important;
  border-color: rgba(11, 23, 48, .12) !important;
}

.kp-practice-detail-page .video {
  border: 0 !important;
  background: #000 !important;
}

.kp-practice-detail-page .score-panel h2::after {
  content: "  ★★★";
  color: var(--kp-yellow);
  font-size: .82em;
}

.kp-practice-detail-page .song-meta-box,
.kp-practice-detail-page .keyboard-box,
.kp-practice-detail-page .practice-tips,
.kp-practice-detail-page .desc-toggle {
  background: linear-gradient(180deg, #fff, #f4f8ff) !important;
  border: 1px solid var(--kp-line) !important;
}

.kp-practice-detail-page .kb {
  border-radius: 8px !important;
  background: #102344 !important;
}

.kp-practice-detail-page .kb-w.used {
  background: linear-gradient(180deg, #fff2bd 0%, var(--kp-yellow) 100%) !important;
}

.kp-practice-detail-page .kb-b.used {
  background: linear-gradient(180deg, var(--kp-purple) 0%, #5130d6 100%) !important;
}

.kp-practice-detail-page .upnext-item {
  border-radius: 0 !important;
}

.kp-practice-detail-page .legal-footer,
.kp-practice-detail-page .site-disclosure {
  border-radius: 8px !important;
}

@media (max-width: 900px) {
  .kp-header-inner { min-height: auto; padding: 12px 0; align-items: flex-start; }
  .kp-nav { display: none; }
  .kp-hero {
    min-height: 72svh;
    padding-top: 28px;
    background:
      linear-gradient(180deg, rgba(7, 17, 38, .66), rgba(7, 17, 38, .88)),
      url('/assets/brand/kidspiano-app-hero-bg-v2.png') center / cover no-repeat;
  }
  .kp-hero-grid,
  .kp-coming-hero-inner,
  .kp-beta-panel,
  .kp-midi-article,
  .kp-game-grid,
  .kp-split,
  .kp-app-dev-grid {
    grid-template-columns: 1fr;
  }
  .kp-metrics,
  .kp-feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .kp-note-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .kp-map { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .kp-node:nth-child(2n) { transform: none; }
  .kp-redesign .dev-menu,
  .kp-redesign .download-menu {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .kp-shell,
  .kp-header-inner {
    width: min(100% - 20px, 1180px);
  }
  .kp-brand { font-size: 22px; }
  .kp-brand-mark { width: 36px; height: 36px; }
  .kp-header-inner { gap: 10px; }
  .kp-lang label { display: none; }
  .kp-lang select { max-width: 112px; font-size: 12px; }
  .kp-hero h1 { font-size: clamp(36px, 12vw, 54px); }
  .kp-coming-hero h1 { font-size: clamp(36px, 12vw, 54px); }
  .kp-actions .kp-button,
  .kp-actions .kp-cta-status { width: 100%; }
  .kp-metrics,
  .kp-feature-grid,
  .kp-note-grid,
  .kp-map {
    grid-template-columns: 1fr;
  }
  .kp-note-card {
    min-height: 104px;
  }
  .kp-dev-preview img {
    min-height: 220px;
  }
  .kp-section {
    padding: 48px 0;
  }
  .kp-section-head {
    display: block;
  }
  .kp-redesign:not(.kp-content-page):not(.kp-practice-page) .wrap {
    width: min(100% - 20px, 1180px);
  }
  .kp-redesign .dev-menu,
  .kp-redesign .download-menu {
    grid-template-columns: 1fr;
  }
}

@media screen {
  body.kp-print-page {
    color: var(--kp-ink);
    background:
      radial-gradient(circle at 10% 0%, rgba(63, 215, 255, .16), transparent 30%),
      radial-gradient(circle at 92% 12%, rgba(139, 92, 246, .14), transparent 32%),
      linear-gradient(180deg, #ffffff, #eef6ff);
    font-family: "Yu Gothic UI", "Yu Gothic", Meiryo, "Hiragino Kaku Gothic ProN", sans-serif;
  }

  .kp-print-page .screen-only,
  .kp-print-page main,
  .kp-print-page .panel {
    border-radius: 8px !important;
  }

  .kp-print-page .screen-title,
  .kp-print-page h1 {
    color: var(--kp-navy-950) !important;
    font-family: "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif !important;
    letter-spacing: 0 !important;
    text-shadow: none !important;
    -webkit-text-stroke: 0 !important;
  }

  .kp-print-page .screen-only,
  .kp-print-page .panel {
    border: 1px solid var(--kp-line) !important;
    background: rgba(255, 255, 255, .96) !important;
    box-shadow: var(--kp-shadow) !important;
  }

  .kp-print-page .button,
  .kp-print-page .action-btn,
  .kp-print-page .nav-link,
  .kp-print-page button {
    border-radius: 8px !important;
  }

  .kp-print-page .button,
  .kp-print-page .action-btn.main,
  .kp-print-page .primary {
    background: linear-gradient(180deg, #233bff, #1726a9) !important;
    color: #fff !important;
    border-color: transparent !important;
    box-shadow: 0 12px 24px rgba(47, 80, 255, .22), inset 0 -3px 0 rgba(0, 0, 0, .18) !important;
  }
}