:root {
  color-scheme: light;
  --panel: rgba(255, 250, 240, 0.9);
  --ink: #1f2933;
  --muted: #52606d;
  --accent: #b85c38;
  --accent-dark: #8f4124;
  --idle: #b0b7c3;
  --success: #2f9e44;
  --error: #d6333c;
  --shadow: 0 24px 50px rgba(64, 47, 26, 0.14);
  --card-shadow: 0 14px 30px rgba(98, 67, 43, 0.08);
  --grid-line: rgba(185, 161, 142, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(135deg, #f6efe6 0%, #efe4d6 48%, #f8f4ec 100%);
  background-size: 40px 40px, 40px 40px, 100% 100%;
}

.app {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.panel {
  width: min(760px, 100%);
  padding: 32px;
  border: 1px solid rgba(31, 41, 51, 0.08);
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
}

.home-shell {
  width: min(1040px, 100%);
}

.site-auth-shell {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
}

.site-auth-topbar {
  position: absolute;
  top: 18px;
  right: 18px;
  pointer-events: auto;
}

.site-auth-anchor {
  position: relative;
}

.site-auth-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 128px;
  min-height: 52px;
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(31, 41, 51, 0.94);
  color: #fffaf4;
  box-shadow: 0 12px 24px rgba(31, 41, 51, 0.18);
}

.site-auth-button:hover {
  background: #10161d;
}

.site-auth-button.is-avatar-button {
  min-width: 58px;
  width: 58px;
  height: 58px;
  padding: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
}

.site-auth-button-label.hidden {
  display: none;
}

.site-auth-button-avatar {
  display: grid;
  place-items: center;
}

.site-auth-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 210px;
  padding: 10px;
  border-radius: 18px;
  background: rgba(19, 15, 42, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 44px rgba(15, 10, 32, 0.28);
}

.site-auth-menu-item {
  width: 100%;
  justify-content: flex-start;
  border-radius: 14px;
  background: transparent;
  color: #f4ecff;
  box-shadow: none;
}

.site-auth-menu-item:hover {
  background: rgba(255, 255, 255, 0.12);
}

.site-auth-menu-item-danger {
  color: #ff7b8c;
}

.site-auth-modal {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: auto;
  padding: 16px;
}

.site-auth-modal[hidden] {
  display: none !important;
}

.site-auth-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 11, 34, 0.46);
  backdrop-filter: blur(4px);
}

.site-auth-card {
  position: relative;
  z-index: 1;
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  padding: 22px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 30px 70px rgba(17, 10, 36, 0.34);
  backdrop-filter: blur(10px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.site-auth-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  min-width: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #f8f3ff;
}

.site-auth-close:hover {
  background: rgba(255, 255, 255, 0.22);
}

.site-auth-actions {
  margin-top: 18px;
}

.site-auth-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #f6efff;
  font-weight: 600;
}

.site-auth-checkbox input {
  width: auto;
  accent-color: #f2f2ff;
}

.site-auth-checkbox-inline {
  margin-top: 0;
}

.site-auth-error {
  min-height: 1.4em;
  margin: 12px 0 0;
  color: #ffd4e0;
}

.site-auth-error.is-success {
  color: #d7ffe0;
}

.site-auth-hero {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  padding: 26px;
  background:
    radial-gradient(circle at top center, rgba(222, 141, 255, 0.42), transparent 38%),
    linear-gradient(180deg, rgba(157, 73, 241, 0.82), rgba(89, 34, 178, 0.88));
}

.site-auth-stars,
.site-auth-mountains,
.site-auth-forest,
.site-auth-sky-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.site-auth-stars {
  opacity: 0.78;
  background-image:
    radial-gradient(circle at 10% 18%, rgba(255,255,255,0.95) 0 1px, transparent 2px),
    radial-gradient(circle at 26% 12%, rgba(255,255,255,0.78) 0 1px, transparent 2px),
    radial-gradient(circle at 49% 21%, rgba(255,255,255,0.95) 0 1px, transparent 2px),
    radial-gradient(circle at 67% 10%, rgba(255,255,255,0.82) 0 1px, transparent 2px),
    radial-gradient(circle at 82% 20%, rgba(255,255,255,0.92) 0 1px, transparent 2px),
    radial-gradient(circle at 58% 6%, rgba(255,255,255,0.8) 0 1px, transparent 2px),
    radial-gradient(circle at 15% 32%, rgba(255,255,255,0.72) 0 1px, transparent 2px),
    radial-gradient(circle at 92% 30%, rgba(255,255,255,0.72) 0 1px, transparent 2px);
}

.site-auth-mountains {
  background:
    linear-gradient(160deg, transparent 0 56%, rgba(97, 46, 174, 0.86) 56% 100%),
    linear-gradient(200deg, transparent 0 55%, rgba(120, 63, 198, 0.82) 55% 100%);
  clip-path: polygon(0 55%, 12% 46%, 22% 52%, 34% 39%, 45% 54%, 58% 43%, 70% 56%, 82% 44%, 100% 54%, 100% 100%, 0 100%);
  opacity: 0.95;
}

.site-auth-forest {
  background:
    linear-gradient(180deg, transparent 0 66%, rgba(48, 18, 98, 0.92) 66% 100%);
  clip-path: polygon(0 100%, 0 70%, 5% 76%, 8% 68%, 12% 79%, 17% 66%, 21% 79%, 27% 67%, 31% 79%, 36% 65%, 41% 81%, 48% 66%, 53% 82%, 59% 69%, 66% 84%, 72% 67%, 78% 83%, 84% 69%, 90% 82%, 95% 71%, 100% 78%, 100% 100%);
}

.site-auth-sky-glow {
  background: radial-gradient(circle at 50% 4%, rgba(255,255,255,0.34), transparent 28%);
}

.site-auth-form-shell {
  position: relative;
  z-index: 1;
  width: min(320px, 100%);
  margin: 0 auto;
  padding: 18px 0 8px;
  color: #fff5ff;
}

.site-auth-hero-eyebrow {
  text-align: center;
  color: rgba(255, 243, 255, 0.74);
}

.site-auth-hero-title {
  text-align: center;
  font-size: clamp(2.1rem, 6vw, 2.7rem);
}

.site-auth-hero-copy {
  margin: 10px auto 18px;
  max-width: 28ch;
  text-align: center;
  color: rgba(255, 239, 255, 0.88);
}

.site-auth-field {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  color: #fff5ff;
}

.site-auth-field input {
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.12);
  color: #fffdfd;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.site-auth-field input::placeholder {
  color: rgba(255,255,255,0.7);
}

.site-auth-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 14px;
}

.site-auth-link-button {
  min-width: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
  color: #fff3ff;
}

.site-auth-link-button:hover {
  background: transparent;
  color: #ffffff;
  text-decoration: underline;
}

.site-auth-form-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

.site-auth-primary {
  background: #ffffff;
  color: #3a156e;
}

.site-auth-primary:hover {
  background: #f5ebff;
  color: #341061;
}

.site-auth-switch-copy {
  margin: 14px 0 0;
  text-align: center;
  color: rgba(255, 241, 255, 0.86);
}

.site-avatar-editor {
  margin-top: 18px;
  padding: 16px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

@media (max-height: 900px) {
  .site-auth-card {
    padding: 18px;
    max-height: calc(100vh - 20px);
  }

  .site-auth-hero {
    padding: 20px;
  }

  .site-auth-form-shell {
    padding-top: 12px;
  }

  .site-avatar-editor {
    margin-top: 14px;
    padding: 14px;
  }
}

@media (max-height: 760px) {
  .site-auth-modal {
    align-items: start;
    padding: 12px;
  }

  .site-auth-card {
    width: min(560px, calc(100vw - 24px));
    max-height: calc(100vh - 24px);
    border-radius: 24px;
    padding: 16px;
  }

  .site-auth-hero {
    border-radius: 20px;
    padding: 18px;
  }

  .site-auth-hero-copy {
    margin-bottom: 14px;
  }

  .site-auth-field,
  .site-auth-row,
  .site-auth-form-actions,
  .site-avatar-editor {
    margin-top: 12px;
  }
}

.site-avatar-preview-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-avatar-preview-wrap .support-text,
.site-avatar-preview-wrap .spoken-label {
  color: rgba(255, 243, 255, 0.9);
}

.site-avatar-mode-row,
.site-avatar-color-grid,
.site-avatar-emoji-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-avatar-mode-row {
  margin-top: 16px;
}

.site-avatar-mode {
  min-width: 0;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.1);
  color: #fff7ff;
}

.site-avatar-mode.is-selected {
  background: #ffffff;
  color: #38146b;
}

.site-avatar-panel {
  margin-top: 16px;
}

.site-avatar-color-grid,
.site-avatar-emoji-grid {
  margin-top: 14px;
}

.site-avatar-color {
  min-width: 0;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 3px solid rgba(255,255,255,0.18);
  box-shadow: none;
}

.site-avatar-color.is-selected {
  transform: scale(1.08);
  border-color: #ffffff;
}

.site-avatar-emoji {
  min-width: 0;
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 16px;
  background: rgba(255,255,255,0.14);
  font-size: 1.4rem;
}

.site-avatar-emoji.is-selected {
  background: #ffffff;
}

.site-avatar {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: #ffffff;
  font-weight: 700;
  overflow: hidden;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.18);
}

.site-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-avatar-large {
  width: 72px;
  height: 72px;
  font-size: 1.8rem;
}

.site-avatar-photo {
  background: #ffffff;
}

.site-auth-card > #site-auth-prompt-view,
.site-auth-card > #site-auth-settings-view,
.site-auth-card > #site-auth-delete-view {
  color: #fff6ff;
}

.site-auth-card > #site-auth-prompt-view,
.site-auth-card > #site-auth-settings-view,
.site-auth-card > #site-auth-delete-view {
  padding: 18px 18px 10px;
}

#site-auth-prompt-view.hidden,
#site-auth-auth-view.hidden,
#site-auth-settings-view.hidden,
#site-auth-delete-view.hidden,
#site-auth-settings-editor-wrap.hidden,
.site-auth-danger-zone.hidden {
  display: none !important;
}

#site-auth-settings-view,
#site-auth-delete-view {
  display: grid;
  gap: 16px;
}

#site-auth-settings-view > *,
#site-auth-delete-view > * {
  margin: 0;
}

#site-auth-prompt-view .support-text,
#site-auth-settings-view .support-text,
#site-auth-delete-view .support-text {
  color: rgba(255, 240, 255, 0.88);
}

#site-auth-settings-view .form-field,
#site-auth-prompt-view .form-field,
#site-auth-delete-view .form-field {
  color: #fff6ff;
}

#site-auth-settings-view input,
#site-auth-prompt-view input,
#site-auth-delete-view input {
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.12);
  color: #fffdfd;
}

#site-auth-settings-view input::placeholder,
#site-auth-prompt-view input::placeholder,
#site-auth-delete-view input::placeholder {
  color: rgba(255,255,255,0.68);
}

.site-auth-danger-zone {
  padding: 16px;
  border-radius: 22px;
  background: rgba(180, 39, 73, 0.16);
  border: 1px solid rgba(255, 133, 157, 0.3);
  display: grid;
  gap: 10px;
}

.site-auth-danger-button {
  background: rgba(180, 39, 73, 0.22);
  color: #ffd7df;
  border: 1px solid rgba(255, 133, 157, 0.35);
}

.site-auth-danger-button:hover {
  background: rgba(180, 39, 73, 0.32);
  color: #fff1f4;
}

#site-auth-settings-view .site-auth-checkbox,
#site-auth-delete-view .site-auth-field {
  margin-top: 2px;
}

#site-auth-settings-view .site-auth-actions,
#site-auth-delete-view .site-auth-actions {
  margin-top: 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

#site-auth-settings-view .site-auth-actions > button,
#site-auth-delete-view .site-auth-actions > button {
  flex: 1 1 180px;
}

#site-auth-settings-view .site-avatar-editor {
  margin-top: 0;
}

.home-header {
  text-align: center;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--accent-dark);
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 0.98;
}

h2,
h3 {
  margin: 0;
  font-size: 1.1rem;
}

.intro {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 1.05rem;
  color: var(--muted);
}

.home-subtitle {
  margin: 14px auto 0;
  max-width: 48ch;
  font-size: 1.05rem;
  color: var(--muted);
}

.home-stat-row {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
}

.home-stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(221, 208, 192, 0.95);
  color: #6f6257;
}

.home-stat-text {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stats {
  margin-top: 28px;
}

.stats,
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.creations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 22px;
}

.creation-card,
.stat-card,
.spoken-wrap,
.info,
.test-panel,
.contact-panel {
  padding: 18px 20px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(206, 173, 144, 0.8);
  box-shadow: var(--card-shadow);
}

.creation-card {
  min-height: 270px;
  display: grid;
  justify-items: center;
  align-content: start;
  text-align: center;
  padding: 30px 24px;
}

.creation-card-active {
  background: rgba(255, 252, 248, 0.96);
  transform: translateY(-2px);
}

.creation-card-muted {
  opacity: 0.9;
}

.creation-icon {
  width: 112px;
  height: 112px;
  border-radius: 28px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  font-size: 3.5rem;
  font-weight: 700;
}

.pi-icon {
  background: linear-gradient(135deg, #ffb56b 0%, #df6c3c 100%);
  color: #fff9f2;
  box-shadow: 0 16px 30px rgba(184, 92, 56, 0.25);
}

.soon-icon {
  background: linear-gradient(135deg, #ece2d6 0%, #ddd0c0 100%);
  color: #7b6b5f;
}

.creation-card p,
.support-text,
.sequence-display,
.pi-display,
.test-panel p,
.contact-panel p {
  margin: 12px 0 0;
  color: var(--muted);
}

.creation-link,
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
  min-width: 120px;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #fffaf4;
  text-decoration: none;
  font-weight: 700;
}

.creation-link:hover {
  background: var(--accent-dark);
}

.back-link:hover {
  background: transparent;
  color: var(--accent-dark);
  text-decoration: underline;
}

.creation-link-disabled {
  background: #ddd0c0;
  color: #6f6257;
}

.stat-label,
.spoken-label,
.status-label {
  display: block;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.stat-card strong,
.spoken-digit {
  display: block;
  margin-top: 8px;
  font-size: 2rem;
}

.home-stat-pill strong {
  display: inline-block;
  margin-top: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-dark);
}

.back-link {
  margin-top: 0;
  margin-bottom: 18px;
  background: transparent;
  color: var(--accent-dark);
  padding: 0;
  min-width: 0;
}

.status-wrap {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
  margin-top: 24px;
  padding: 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(31, 41, 51, 0.08);
}

.signal {
  width: 84px;
  height: 84px;
  border-radius: 999px;
  background: var(--idle);
  box-shadow: inset 0 0 0 6px rgba(255, 255, 255, 0.5);
  transition: background-color 120ms ease, box-shadow 120ms ease;
}

.signal-idle {
  background: var(--idle);
}

.signal-success {
  background: var(--success);
  box-shadow:
    0 0 24px rgba(47, 158, 68, 0.45),
    inset 0 0 0 6px rgba(255, 255, 255, 0.55);
}

.signal-error {
  background: var(--error);
  box-shadow:
    0 0 24px rgba(214, 51, 60, 0.35),
    inset 0 0 0 6px rgba(255, 255, 255, 0.55);
}

.status-text {
  margin: 6px 0 0;
  font-size: 1.15rem;
}

.spoken-wrap,
.test-panel,
.info,
.contact-panel {
  margin-top: 18px;
}

.actions,
.test-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.pi-record-sync-status {
  margin: 10px 2px 0;
}

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

.section-head-stack {
  display: block;
}

.contact-form {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.form-field {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 600;
}

.hidden-field {
  display: none;
}

button,
input,
textarea {
  font: inherit;
  font-size: 1rem;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  cursor: pointer;
  background: var(--accent);
  color: #fffdf7;
  transition: transform 100ms ease, background-color 100ms ease;
}

button:hover {
  transform: translateY(-1px);
  background: var(--accent-dark);
}

button.secondary {
  background: #d9c7ac;
  color: var(--ink);
}

button.is-tracking {
  background: #2f6b3f;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(31, 41, 51, 0.18);
  border-radius: 20px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.9);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.sequence-display,
.pi-display {
  overflow-wrap: anywhere;
  font-size: 1.1rem;
  line-height: 1.5;
}

@media (max-width: 640px) {
  .panel {
    padding: 24px;
  }

  .site-auth-topbar {
    top: 12px;
    right: 12px;
  }

  .site-auth-button {
    min-width: 106px;
    padding: 12px 16px;
  }

  .status-wrap {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .creation-card {
    min-height: auto;
  }

  .test-controls input {
    width: 100%;
  }
}


.prime-icon {
  background: linear-gradient(135deg, #6f8f2e 0%, #2f6b3f 100%);
  color: #f7ffe8;
  box-shadow: 0 16px 30px rgba(47, 107, 63, 0.24);
}

.homework-icon {
  background: linear-gradient(135deg, #3c8f9a 0%, #28597a 100%);
  color: #f2fbff;
  box-shadow: 0 16px 30px rgba(40, 89, 122, 0.24);
}

.number-info-icon {
  background: linear-gradient(135deg, #6a86c7 0%, #2f4f8c 100%);
  color: #eef4ff;
  box-shadow: 0 16px 30px rgba(47, 79, 140, 0.24);
}

.snake-icon {
  background: linear-gradient(135deg, #88a44a 0%, #2f6b3f 100%);
  color: #f8ffe8;
  box-shadow: 0 16px 30px rgba(47, 107, 63, 0.24);
}

.study-icon {
  background: linear-gradient(135deg, #e4a84d 0%, #b9662d 100%);
  color: #fff8ea;
  box-shadow: 0 16px 30px rgba(185, 102, 45, 0.24);
}

.prime-config,
.prime-question {
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(206, 173, 144, 0.8);
  box-shadow: var(--card-shadow);
}

.level-grid,
.answer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.level-grid {
  margin-top: 18px;
}

.level-pill,
.answer-button {
  width: 100%;
  min-height: 78px;
  text-align: center;
}

.level-pill span {
  display: block;
  margin-top: 6px;
  font-size: 0.9rem;
  font-weight: 400;
  color: rgba(255, 253, 247, 0.88);
}

.level-pill.is-selected {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.custom-range {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.hidden {
  display: none;
}

.prime-range-label {
  display: block;
  margin-top: 8px;
  font-size: 1.6rem;
}

.prime-number-display {
  display: block;
  margin-top: 10px;
  font-size: clamp(3.2rem, 12vw, 5.4rem);
  line-height: 0.95;
}

.answer-grid {
  margin-top: 24px;
}

.answer-button.secondary {
  background: #d9c7ac;
  color: var(--ink);
}

.number-info-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: end;
}

.number-info-stats {
  margin-top: 18px;
}

.number-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.homework-panel {
  width: min(900px, 100%);
}

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

.homework-stats .stat-card {
  padding: 14px 12px;
  text-align: center;
}

.homework-stats .stat-label {
  font-size: 0.8rem;
}

.homework-stats .stat-card strong {
  margin-top: 6px;
  font-size: 1.6rem;
}

.homework-auth-gate {
  margin-top: 24px;
}

.homework-form-panel,
.homework-list {
  margin-top: 18px;
}

.homework-form-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.homework-form-toggle-icon {
  display: inline-grid;
  place-items: center;
  width: 1.3rem;
  height: 1.3rem;
  border-radius: 999px;
  background: rgba(47, 107, 63, 0.12);
  color: #2f6b3f;
  font-weight: 800;
  line-height: 1;
}

.homework-form-toggle.is-open .homework-form-toggle-icon {
  background: rgba(120, 84, 43, 0.12);
  color: #78542b;
}

.homework-form-body {
  margin-top: 18px;
}

.homework-archived-panel {
  margin-top: 18px;
}

.homework-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.homework-notes-field {
  grid-column: 1 / -1;
}

.homework-complete-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border: 1px solid rgba(31, 41, 51, 0.18);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.9);
}

.homework-complete-toggle input {
  width: auto;
}

.homework-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.homework-filter-row .is-selected,
button.secondary.is-selected {
  background: #2f6b3f;
  color: #f8fff8;
}

.homework-list {
  display: grid;
  gap: 16px;
}

.homework-item {
  padding: 18px 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(206, 173, 144, 0.8);
  box-shadow: var(--card-shadow);
}

.homework-item.is-complete {
  background: rgba(245, 252, 246, 0.95);
  border-color: rgba(113, 178, 124, 0.6);
}

.homework-item.is-archived {
  background: rgba(247, 245, 240, 0.92);
  border-color: rgba(182, 168, 148, 0.65);
  box-shadow: 0 10px 24px rgba(79, 61, 43, 0.08);
}

.homework-item-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.homework-item h3 {
  margin-top: 6px;
  font-size: 1.35rem;
}

.homework-due-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(221, 208, 192, 0.95);
  color: #6f6257;
  font-weight: 700;
  white-space: nowrap;
}

.homework-due-pill.is-urgent {
  background: rgba(214, 51, 60, 0.16);
  color: #b4232c;
}

.homework-due-pill.is-overdue {
  background: rgba(214, 51, 60, 0.14);
  color: #b4232c;
}

.homework-due-pill.is-complete {
  background: rgba(62, 146, 76, 0.16);
  color: #1f7a34;
}

.homework-due-pill.is-with-check::before {
  content: "\2713";
  margin-right: 6px;
  font-weight: 800;
}

.homework-due-pill.is-archived {
  background: rgba(116, 102, 79, 0.14);
  color: #6c5a45;
}

.homework-notes-copy {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.homework-item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.homework-empty-state {
  padding: 18px 0 4px;
}

@media (max-width: 900px) {
  .homework-stats {
    grid-template-columns: repeat(5, minmax(88px, 1fr));
  }
}

@media (max-width: 720px) {
  .homework-stats {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }
}

.number-info-panel {
  padding: 18px 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(206, 173, 144, 0.72);
  box-shadow: var(--card-shadow);
}

.number-info-panel .sequence-display {
  margin-top: 10px;
}

.snake-board-panel {
  margin-top: 18px;
  padding: 18px 20px 24px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(206, 173, 144, 0.8);
  box-shadow: var(--card-shadow);
}

.snake-board-copy {
  margin-bottom: 14px;
}

.snake-board-copy .support-text {
  margin: 6px 0 0;
}

.snake-board-wrap {
  width: min(520px, 100%);
  margin: 0 auto;
}

.snake-board {
  --snake-grid-size: 16;
  display: grid;
  grid-template-columns: repeat(var(--snake-grid-size), minmax(0, 1fr));
  gap: 3px;
  width: 100%;
  aspect-ratio: 1;
  padding: 12px;
  border-radius: 24px;
  border: 1px solid rgba(185, 161, 142, 0.35);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(246, 236, 221, 0.96)),
    linear-gradient(135deg, rgba(255, 248, 239, 0.92), rgba(241, 230, 214, 0.92));
}

.snake-cell {
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(191, 168, 143, 0.35);
}

.snake-cell-snake {
  background: #6f8f2e;
  border-color: rgba(47, 107, 63, 0.45);
}

.snake-cell-head {
  background: #2f6b3f;
  border-color: rgba(31, 41, 51, 0.2);
}

.snake-cell-food {
  background: #b85c38;
  border-color: rgba(143, 65, 36, 0.35);
}

.snake-controls {
  display: none;
  grid-template-columns: repeat(3, minmax(64px, 78px));
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}

.study-panel {
  width: min(1040px, 100%);
}

.study-dashboard {
  margin-top: 18px;
}

.study-dashboard-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.study-dashboard-actions {
  margin-left: auto;
  justify-content: flex-end;
}

.study-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.study-dashboard-block {
  padding: 18px 18px 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(206, 173, 144, 0.72);
}

.study-dashboard-copy {
  min-height: 40px;
}

.study-dashboard .study-course-grid,
.study-dashboard .study-practice-grid,
.study-dashboard .study-level-grid {
  margin-top: 14px;
}

.study-course-grid,
.study-practice-grid {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.study-course-card,
.study-practice-card {
  width: 100%;
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid rgba(194, 166, 135, 0.35);
  background: rgba(255, 249, 240, 0.92);
  color: var(--ink);
  text-align: left;
  box-shadow: 0 10px 22px rgba(119, 89, 51, 0.08);
}

.study-course-card strong,
.study-practice-card strong {
  display: block;
  font-size: 1.05rem;
}

.study-practice-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.45;
}

.study-course-card.is-selected,
.study-practice-card.is-selected {
  background: linear-gradient(135deg, #7a5532 0%, #b37339 100%);
  color: #fffaf1;
  transform: translateY(-1px);
}

.study-course-card.is-selected strong,
.study-practice-card.is-selected strong,
.study-course-card.is-selected span,
.study-practice-card.is-selected span {
  color: #fffaf1;
}

.study-main {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.study-level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.study-session-stats {
  margin-top: 18px;
}

.study-question-panel {
  margin-top: 18px;
  padding: 20px 22px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(206, 173, 144, 0.8);
  box-shadow: var(--card-shadow);
}

.study-word-prompt {
  margin: 8px 0 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1;
}

.study-word-prompt.study-word-prompt-compact {
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.35;
}

.study-question-copy {
  margin-top: 14px;
}

.study-dialogue {
  display: grid;
  gap: 10px;
  margin-top: 12px;
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 248, 238, 0.95);
  border: 1px solid rgba(206, 173, 144, 0.65);
}

.study-dialogue-line {
  margin: 0;
  line-height: 1.45;
  color: var(--ink);
}

.study-dialogue-line strong {
  color: #7a5532;
}

#study-answer-grid {
  margin-top: 22px;
}

#study-answer-grid .answer-button {
  min-height: 94px;
  padding: 16px;
}

#study-answer-grid .answer-button strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 8px;
}

#study-answer-grid .answer-button span {
  display: block;
  line-height: 1.35;
}

#study-answer-grid .answer-button.is-correct-answer {
  background: #2f6b3f;
  color: #f8fff8;
  border-color: rgba(47, 107, 63, 0.35);
}

#study-answer-grid .answer-button.is-wrong-answer {
  background: #b8503d;
  color: #fff6f4;
  border-color: rgba(184, 80, 61, 0.35);
}

@media (max-width: 880px) {
  .study-dashboard-head {
    flex-direction: column;
  }

  .study-dashboard-actions {
    width: 100%;
    justify-content: stretch;
  }

  .study-dashboard-grid {
    grid-template-columns: 1fr;
  }
}

.snake-controls-spacer {
  visibility: hidden;
}

.snake-control {
  min-width: 0;
  padding: 14px;
  border-radius: 18px;
  font-size: 1.15rem;
}
.bunny-icon {
  background: linear-gradient(135deg, #ffd7e0 0%, #f6a7b9 100%);
  color: #7a3750;
  box-shadow: 0 16px 30px rgba(170, 96, 120, 0.22);
}

.game-panel-wide {
  width: min(1040px, 100%);
}

.bunny-custom {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.inline-check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.inline-check input {
  width: auto;
}

.bunny-stage-panel {
  margin-top: 18px;
  padding: 18px 20px 24px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(206, 173, 144, 0.8);
  box-shadow: var(--card-shadow);
}

.bunny-stage-head {
  margin-bottom: 14px;
}

.bunny-stage {
  position: relative;
  min-height: 380px;
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid rgba(185, 161, 142, 0.35);
  background:
    radial-gradient(circle at top, rgba(255, 253, 247, 0.92), rgba(255, 247, 236, 0.96) 50%, rgba(246, 233, 214, 0.98) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(245, 233, 213, 0.8));
}

.bunny-stage::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 30%;
  background: linear-gradient(180deg, rgba(174, 221, 153, 0) 0%, rgba(154, 204, 132, 0.68) 100%);
}

.egg-node {
  position: absolute;
  width: 108px;
  height: 124px;
  padding: 0;
  border: 0;
  background: transparent;
  transform: translate(-50%, -50%);
  transition: left 360ms ease, top 360ms ease;
  z-index: 2;
}

.egg-node:disabled {
  opacity: 1;
}

.egg-node .egg-shadow {
  position: absolute;
  left: 50%;
  bottom: 8px;
  width: 62px;
  height: 16px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: rgba(112, 81, 44, 0.16);
  filter: blur(3px);
}

.egg-node .egg-visual,
.egg-node .egg-bunny {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.egg-node .egg-visual {
  bottom: 10px;
  font-size: 4.8rem;
  line-height: 1;
  transform-origin: center bottom;
  transition: transform 260ms ease, opacity 180ms ease, filter 180ms ease;
}

.egg-node .egg-bunny {
  bottom: 56px;
  font-size: 2.5rem;
  line-height: 1;
  opacity: 0;
  transform: translateX(-50%) translateY(16px) scale(0.85);
  transition: transform 180ms ease, opacity 180ms ease;
}

.egg-node.is-peeking .egg-bunny,
.egg-node.is-winner .egg-bunny,
.egg-node.is-hop-out .egg-bunny {
  opacity: 1;
}

.egg-node.is-peeking .egg-bunny,
.egg-node.is-winner .egg-bunny {
  transform: translateX(-50%) translateY(0) scale(1);
}

.egg-node.is-hop-out .egg-bunny {
  transform: translateX(-20%) translateY(-140px) scale(0.95) rotate(-8deg);
}

.egg-node.is-spinning .egg-visual {
  animation: egg-spin 420ms linear 1;
}

.egg-node.is-hidden-trick .egg-visual,
.egg-node.is-hidden-trick .egg-shadow,
.egg-node.is-hidden-trick .egg-bunny {
  opacity: 0.08;
}

.egg-node.is-loser .egg-visual {
  filter: drop-shadow(0 0 18px rgba(214, 51, 60, 0.2));
  transform: translateX(-50%) scale(0.92);
}

.egg-node.is-winner .egg-visual {
  filter: drop-shadow(0 0 18px rgba(47, 158, 68, 0.26));
  transform: translateX(-50%) scale(1.06);
}

.stage-flash {
  animation: stage-flash 180ms ease;
}

.stage-zoom {
  animation: stage-zoom 220ms ease;
}

.stage-distraction {
  position: absolute;
  z-index: 3;
  font-size: 2rem;
  opacity: 0;
  animation: stage-float 900ms ease forwards;
  pointer-events: none;
}

@keyframes egg-spin {
  0% { transform: translateX(-50%) rotate(0deg) scale(1); }
  50% { transform: translateX(-50%) rotate(180deg) scale(1.08); }
  100% { transform: translateX(-50%) rotate(360deg) scale(1); }
}

@keyframes stage-flash {
  0% { box-shadow: inset 0 0 0 0 rgba(255, 244, 170, 0.85); }
  100% { box-shadow: inset 0 0 0 18px rgba(255, 244, 170, 0); }
}

@keyframes stage-zoom {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

@keyframes stage-float {
  0% { opacity: 0; transform: translate(-50%, 24px) scale(0.65); }
  20% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -46px) scale(1.15); }
}

@media (max-width: 640px) {
  .game-panel-wide {
    width: 100%;
  }

  .number-info-controls {
    grid-template-columns: 1fr;
  }

  .snake-board {
    gap: 2px;
    padding: 10px;
  }

  .snake-cell {
    border-radius: 4px;
  }

  .snake-controls {
    display: grid;
  }

  .bunny-stage {
    min-height: 320px;
  }

  .egg-node {
    width: 82px;
    height: 102px;
  }

  .egg-node .egg-visual {
    font-size: 3.7rem;
  }

  .egg-node .egg-bunny {
    bottom: 44px;
    font-size: 2rem;
  }
}
.legend-gap {
  display: inline-block;
  width: 18px;
}

.egg-node .egg-bunny-real,
.egg-node .egg-bunny-decoy {
  bottom: 56px;
  font-size: 2.5rem;
  line-height: 1;
  opacity: 0;
  transition: transform 180ms ease, opacity 180ms ease;
}

.egg-node .egg-bunny-real {
  transform: translateX(-50%) translateY(16px) scale(0.85);
}

.egg-node .egg-bunny-decoy {
  transform: translateX(-50%) translateY(16px) scale(0.85);
  color: #36589a;
  text-shadow: 0 0 8px rgba(54, 88, 154, 0.28);
}

.egg-node .egg-bunny-decoy::after {
  content: "\2728";
  position: absolute;
  top: -0.2em;
  right: -0.5em;
  font-size: 0.58em;
  line-height: 1;
}

.egg-node.is-peeking.has-real-bunny .egg-bunny-real,
.egg-node.is-winner.has-real-bunny .egg-bunny-real,
.egg-node.is-hop-out.has-real-bunny .egg-bunny-real {
  opacity: 1;
}

.egg-node.is-decoy-peeking.has-decoy-bunny .egg-bunny-decoy,
.egg-node.has-decoy-bunny.is-loser .egg-bunny-decoy {
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

.egg-node.is-peeking.has-real-bunny .egg-bunny-real,
.egg-node.is-winner.has-real-bunny .egg-bunny-real {
  transform: translateX(-50%) translateY(0) scale(1);
}

.egg-node.is-hop-out.has-real-bunny .egg-bunny-real {
  transform: translateX(-20%) translateY(-140px) scale(0.95) rotate(-8deg);
}

.egg-pattern {
  position: absolute;
  left: 50%;
  top: 56%;
  width: 50px;
  height: 66px;
  border-radius: 45% 45% 48% 48%;
  transform: translate(-50%, -50%);
  opacity: calc(0.92 - (var(--camouflage-progress, 0) * 0.84));
  pointer-events: none;
  mix-blend-mode: multiply;
  transition: opacity 180ms ease;
}

.pattern-0 { background: repeating-linear-gradient(135deg, rgba(214, 128, 144, 0.5), rgba(214, 128, 144, 0.5) 7px, rgba(255,255,255,0) 7px, rgba(255,255,255,0) 14px); }
.pattern-1 { background: radial-gradient(circle at 30% 30%, rgba(111, 143, 46, 0.45) 0 7px, transparent 8px), radial-gradient(circle at 70% 60%, rgba(111, 143, 46, 0.45) 0 7px, transparent 8px); }
.pattern-2 { background: repeating-linear-gradient(0deg, rgba(73, 110, 181, 0.35), rgba(73, 110, 181, 0.35) 6px, rgba(255,255,255,0) 6px, rgba(255,255,255,0) 12px); }
.pattern-3 { background: repeating-linear-gradient(90deg, rgba(216, 161, 74, 0.38), rgba(216, 161, 74, 0.38) 6px, rgba(255,255,255,0) 6px, rgba(255,255,255,0) 12px); }
.pattern-4 { background: radial-gradient(circle at 50% 25%, rgba(148, 91, 169, 0.36) 0 8px, transparent 9px), radial-gradient(circle at 40% 68%, rgba(148, 91, 169, 0.36) 0 6px, transparent 7px), radial-gradient(circle at 68% 58%, rgba(148, 91, 169, 0.36) 0 6px, transparent 7px); }
.pattern-5 { background: repeating-linear-gradient(45deg, rgba(71, 150, 132, 0.36), rgba(71, 150, 132, 0.36) 5px, rgba(255,255,255,0) 5px, rgba(255,255,255,0) 11px); }

.stage-camouflage .egg-visual {
  filter: saturate(calc(1 - (var(--camouflage-progress, 0) * 0.38)));
}

.egg-node.is-selected-guess .egg-visual {
  filter: drop-shadow(0 0 12px rgba(184, 92, 56, 0.22));
  transform: translateX(-50%) scale(1.05);
}

.egg-node.is-selected-guess::after {
  content: "Pick";
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(184, 92, 56, 0.94);
  color: #fffaf4;
}

@media (max-width: 640px) {
  .egg-node .egg-bunny-real,
  .egg-node .egg-bunny-decoy {
    bottom: 44px;
    font-size: 2rem;
  }

  .egg-pattern {
    width: 38px;
    height: 52px;
  }
}

@media (hover: none), (pointer: coarse) {
  .snake-controls {
    display: grid;
  }
}
.egg-node.is-peeking.has-real-bunny .egg-bunny-decoy,
.egg-node.is-winner.has-real-bunny .egg-bunny-decoy,
.egg-node.is-hop-out.has-real-bunny .egg-bunny-decoy,
.egg-node.is-decoy-peeking.has-decoy-bunny .egg-bunny-real,
.egg-node.has-decoy-bunny.is-loser .egg-bunny-real {
  opacity: 0;
}