:root {
  color-scheme: light;
  --paper: #f4efe3;
  --ink: #241b13;
  --muted-ink: #665644;
  --brass: #c99a38;
  --brass-light: #e5be60;
  --brass-dark: #76521d;
  --wood: #342418;
  --focus: #236c75;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--wood);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
}

::selection {
  background: var(--brass-light);
  color: var(--ink);
}

.lock-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.lock-panel {
  width: min(100%, 31rem);
  padding: clamp(1.75rem, 7vw, 3.5rem);
  background: var(--paper);
  border: 1px solid #bcae96;
  border-radius: 2px;
  box-shadow: 0 1.4rem 3rem rgba(0, 0, 0, 0.36);
}

.lock-panel header,
.lock-panel section {
  padding: 0;
}

.lock-panel header {
  margin-bottom: 2rem;
  text-align: center;
}

.ornament {
  margin: 0 0 0.6rem;
  color: var(--brass-dark);
  font-size: 1.35rem;
}

h1 {
  margin: 0 0 0.65rem;
  color: var(--ink);
  font-size: clamp(2rem, 8vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.025em;
}

.clue {
  margin: 0 auto;
  max-width: 25ch;
  color: var(--muted-ink);
  font-size: 1.05rem;
}

label {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--ink);
  font-weight: 700;
}

.plaque-field {
  position: relative;
  width: min(100%, 18rem);
  height: 4.4rem;
  margin: 0 auto;
}

.plaque-letters {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.35rem;
  pointer-events: none;
}

.plaque-letters span {
  display: grid;
  place-items: center;
  border: 2px solid var(--brass-dark);
  background: var(--brass);
  color: #20150a;
  font-family: "Courier New", monospace;
  font-size: 2rem;
  font-weight: 700;
  box-shadow: inset 0 0.35rem 0.7rem rgba(255, 255, 255, 0.24), inset 0 -0.45rem 0.8rem rgba(0, 0, 0, 0.18);
}

#password {
  position: absolute;
  z-index: 2;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  outline: 0;
  background: transparent;
  color: transparent;
  -webkit-text-fill-color: transparent;
  caret-color: transparent;
}

.plaque-field:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

#rules {
  margin: 0.8rem 0 1.4rem;
  color: var(--muted-ink);
  font-size: 0.9rem;
  text-align: center;
}

#field-error {
  min-height: 1.35rem;
  margin: 0 0 0.45rem;
  color: #a51d16;
  font-size: 0.92rem;
  font-weight: 700;
}

#unlock,
#relock {
  display: block;
  width: 100%;
  min-height: 3rem;
  margin: 0;
  border: 1px solid var(--wood);
  border-radius: 2px;
  background: var(--wood);
  color: #fffaf0;
  font-family: inherit;
  font-weight: 700;
}

#unlock:hover:not(:disabled),
#relock:hover:not(:disabled) {
  background: #4a3322;
}

#unlock:focus-visible,
#relock:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

#unlock:disabled {
  border-color: #a29888;
  background: #d3ccbf;
  color: #4d463e;
  opacity: 1;
}

[hidden] {
  display: none !important;
}

#message {
  min-height: 1.5rem;
  margin: 1.35rem 0 0;
  text-align: center;
}

#countdown {
  min-height: 1.35rem;
  margin: 0.3rem 0 0;
  color: var(--muted-ink);
  font-variant-numeric: tabular-nums;
  text-align: center;
}

dialog {
  width: min(calc(100% - 2rem), 22rem);
  padding: 2rem;
  border: 1px solid var(--brass-dark);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
  text-align: center;
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.52);
}

dialog::backdrop {
  background: rgba(20, 13, 8, 0.76);
}

dialog h2 {
  margin: 1rem 0 0.4rem;
}

dialog p {
  margin: 0;
  color: var(--muted-ink);
}

.loader {
  width: 2.4rem;
  height: 2.4rem;
  margin: 0 auto;
  border: 4px solid #d8c9a6;
  border-top-color: var(--brass-dark);
  border-radius: 50%;
  animation: turn 0.8s linear infinite;
}

@keyframes turn {
  to { transform: rotate(1turn); }
}

@media (prefers-reduced-motion: reduce) {
  .loader { animation-duration: 1.8s; }
}

@media (max-width: 370px) {
  .lock-page { padding: 0.6rem; }
  .lock-panel { padding-inline: 1rem; }
  .plaque-field { transform: scale(0.92); transform-origin: center; }
}