:root {
  --ink: #17324d;
  --muted: #657487;
  --paper: #f7f9fc;
  --surface: #ffffff;
  --line: #d9e1e8;
  --blue: #176b87;
  --blue-dark: #0d5068;
  --aqua: #dff4f2;
  --focus: #f2a900;
  --shadow: 0 12px 36px rgba(23, 50, 77, .10);
}

* { box-sizing: border-box; }
html { font-family: ui-rounded, "SF Pro Rounded", "Avenir Next", system-ui, sans-serif; background: var(--paper); color: var(--ink); }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 100% 0%, #e2f6f5 0, transparent 34rem), var(--paper); }
button, textarea { font: inherit; }
button { touch-action: manipulation; }
button:focus-visible, textarea:focus-visible { outline: 4px solid var(--focus); outline-offset: 3px; }
.app-shell { width: min(100%, 1180px); margin: 0 auto; padding: max(22px, env(safe-area-inset-top)) max(22px, env(safe-area-inset-right)) max(36px, env(safe-area-inset-bottom)) max(22px, env(safe-area-inset-left)); }
.topbar { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.eyebrow { margin: 0 0 4px; color: var(--blue); font-size: .85rem; font-weight: 800; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.7rem); letter-spacing: -.04em; }
h2 { margin: 0; font-size: 1.15rem; }
.settings { border: 1px solid var(--line); background: rgba(255,255,255,.8); color: var(--muted); border-radius: 12px; padding: 12px 16px; min-height: 48px; }
.install-tip { margin: 0 0 16px; border: 1px solid #b9dfdc; border-radius: 14px; background: var(--aqua); color: var(--ink); }
.install-tip summary { min-height: 50px; display: flex; align-items: center; padding: 0 16px; cursor: pointer; font-weight: 750; }
.install-tip p { margin: -2px 16px 14px; line-height: 1.5; }
.composer { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 18px; box-shadow: var(--shadow); }
textarea { width: 100%; resize: vertical; min-height: 116px; border: 0; color: var(--ink); background: #f1f5f8; border-radius: 16px; padding: 18px; font-size: clamp(1.35rem, 3vw, 2.25rem); line-height: 1.35; }
textarea::placeholder { color: #8a99a8; }
.composer-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(160px, 1.5fr); gap: 10px; margin-top: 12px; }
.composer-actions button { min-height: 60px; border-radius: 14px; border: 1px solid var(--line); font-size: 1.1rem; font-weight: 750; }
.secondary { background: var(--surface); color: var(--ink); }
.speak { border: 0 !important; background: var(--blue); color: white; box-shadow: 0 7px 16px rgba(23,107,135,.24); }
.speak:active { background: var(--blue-dark); transform: translateY(1px); }
.status { margin: 10px 4px 0; min-height: 1.5em; color: var(--muted); }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; margin: 24px 4px 10px; }
.section-heading span { color: var(--muted); font-size: .9rem; }
.quick-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 9px; }
.quick-grid button { min-height: 66px; padding: 10px; border: 1px solid #b9dfdc; border-radius: 15px; background: var(--aqua); color: var(--ink); font-size: 1rem; font-weight: 700; }
.keyboard { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.letter-speech-toggle { display: flex; align-items: center; gap: 12px; min-height: 48px; width: fit-content; margin-top: 12px; cursor: pointer; font-weight: 700; }
.letter-speech-toggle input { width: 24px; height: 24px; margin: 0; accent-color: var(--blue); }
.letter-speech-toggle input:focus-visible { outline: 4px solid var(--focus); outline-offset: 3px; }
.key { aspect-ratio: 1.25 / 1; min-height: 58px; border: 1px solid #cad5df; border-bottom-width: 4px; border-radius: 14px; background: white; color: var(--ink); font-size: clamp(1.2rem, 2.4vw, 1.7rem); font-weight: 800; }
.key:active, .quick-grid button:active { transform: translateY(2px); border-bottom-width: 1px; }
.history { display: grid; gap: 9px; }
.history-item { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; padding: 13px 14px 13px 18px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.82); }
.history-item p { margin: 0; font-size: 1.05rem; }
.history-item button { min-width: 74px; min-height: 46px; border: 0; border-radius: 11px; color: white; background: var(--blue); font-weight: 750; }
.empty { margin: 0; padding: 20px; border: 1px dashed #b9c7d4; border-radius: 14px; color: var(--muted); text-align: center; }

@media (max-width: 860px) {
  .quick-grid { grid-template-columns: repeat(3, 1fr); }
  .composer-actions { grid-template-columns: repeat(3, 1fr); }
  .speak { grid-column: 1 / -1; }
}
@media (max-width: 540px) {
  .app-shell { padding-inline: 12px; }
  .topbar { align-items: start; }
  .settings { padding: 9px 11px; }
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .composer-actions { grid-template-columns: repeat(3, 1fr); }
  .composer-actions button { font-size: .92rem; }
  textarea { min-height: 104px; }
  .key { min-height: 54px; aspect-ratio: auto; }
}
@media (display-mode: standalone) {
  .install-tip { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

.board-space { width: 100%; min-height: 56px; border: 1px solid var(--line); border-bottom-width: 4px; border-radius: 14px; margin-top: 10px; font-size: 1.2rem; font-weight: 750; }
.save-controls { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.save-check { display: flex; gap: 10px; align-items: center; min-height: 48px; }
.save-check input { width: 24px; height: 24px; accent-color: var(--blue); }
.saved-section button { min-height: 48px; padding: 10px 18px; border: 1px solid var(--line); border-radius: 12px; font: inherit; }
.saved-section button:disabled { opacity: .5; cursor: not-allowed; }
.saved-section details { margin-top: 16px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; }
.saved-section summary { min-height: 32px; cursor: pointer; font-weight: 700; }
#signInForm, #registerForm { display: grid; gap: 12px; max-width: 440px; }
#signInForm label, #registerForm label { display: grid; gap: 6px; }
#signInForm input, #registerForm input { min-height: 48px; width: 100%; padding: 10px; font: inherit; border: 1px solid var(--line); border-radius: 8px; }
#savedItems { margin-top: 16px; }
#savedItems p { overflow-wrap: anywhere; white-space: pre-wrap; }
.saved-actions { display: flex; flex-wrap: wrap; gap: 8px; }
[hidden] { display: none !important; }
@media (max-width: 540px) {
  .keyboard { gap: 5px; }
  .key { min-width: 0; border-radius: 10px; }
  .history-item { grid-template-columns: 1fr; }
}

.inspiration { margin: 0 0 12px; color: var(--muted); }
.eyebrow { font-size: 1rem; letter-spacing: .04em; }
#passwordHint { margin: 0; color: var(--muted); }