:root {
  color-scheme: dark;
  --bg: #17122b;
  --bg-deep: #100c20;
  --surface: #241b3d;
  --line: rgba(225, 198, 137, 0.25);
  --line-strong: rgba(225, 198, 137, 0.5);
  --gold: #e1c689;
  --gold-bright: #f3dda8;
  --text: #fbf8ff;
  --text-muted: #c8bfd8;
  --danger: #ffb7bd;
  --focus: #f4da9c;
  --shadow: 0 24px 70px rgba(8, 5, 20, 0.36);
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --page-width: 47.5rem;
}

* { box-sizing: border-box; }

html {
  min-width: 20rem;
  background: var(--bg-deep);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -8%, rgba(115, 80, 164, 0.28), transparent 31rem),
    linear-gradient(155deg, var(--bg-deep) 0%, var(--bg) 48%, #1d1432 100%);
  font-family: "Segoe UI", "Noto Sans", Arial, sans-serif;
  line-height: 1.5;
}

body::before,
body::after {
  position: fixed;
  z-index: -1;
  content: "";
  pointer-events: none;
}

body::before {
  inset: 0;
  opacity: 0.42;
  background-image:
    radial-gradient(circle, rgba(244, 218, 156, 0.62) 0 1px, transparent 1.5px),
    radial-gradient(circle, rgba(218, 204, 237, 0.46) 0 1px, transparent 1.5px);
  background-position: 2rem 3rem, 8rem 10rem;
  background-size: 13rem 13rem, 19rem 19rem;
  mask-image: linear-gradient(to bottom, black, transparent 74%);
}

body::after {
  top: 9rem;
  left: 50%;
  width: min(66rem, 126vw);
  aspect-ratio: 1;
  border: 1px solid rgba(225, 198, 137, 0.06);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow:
    0 0 0 5rem rgba(225, 198, 137, 0.018),
    0 0 0 11rem rgba(225, 198, 137, 0.012);
}

button,
input { font: inherit; }

button { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: #1a122b;
  background: var(--gold-bright);
  border-radius: 0.5rem;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.page-shell {
  width: min(100% - 2rem, var(--page-width));
  margin-inline: auto;
  padding: clamp(2.75rem, 8vw, 5rem) 0 4rem;
}

.intro {
  max-width: 41rem;
  margin: 0 auto clamp(2rem, 5vw, 3rem);
  text-align: center;
}

.intro__symbol {
  position: relative;
  display: grid;
  width: 3.25rem;
  aspect-ratio: 1;
  margin: 0 auto 1rem;
  place-items: center;
  color: var(--gold-bright);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.intro__symbol::before,
.intro__symbol::after {
  position: absolute;
  width: 4.5rem;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.intro__symbol::before { right: 100%; }
.intro__symbol::after { left: 100%; }
.intro__symbol span { font-size: 1rem; }

.eyebrow {
  margin: 0 0 0.45rem;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 12em;
  margin: 0 auto 0.8rem;
  font-size: clamp(2.15rem, 8vw, 4rem);
  line-height: 1.05;
  text-wrap: balance;
}

.intro__text {
  max-width: 38rem;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: clamp(0.98rem, 2.5vw, 1.08rem);
}

.calculator-panel,
.results {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(46, 35, 76, 0.96), rgba(31, 23, 54, 0.96));
  box-shadow: var(--shadow);
}

.calculator-panel {
  padding: clamp(1.25rem, 4vw, 2rem);
  border-radius: var(--radius-lg);
}

.field-label {
  display: block;
  margin-bottom: 0.55rem;
  font-size: 0.88rem;
  font-weight: 700;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
}

.field-wrap { position: relative; }

.field-wrap::after {
  position: absolute;
  top: 50%;
  right: 1rem;
  width: 0.42rem;
  aspect-ratio: 1;
  content: "";
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 0.28rem rgba(225, 198, 137, 0.1);
  transform: translateY(-50%);
}

input {
  width: 100%;
  min-height: 3.5rem;
  padding: 0.8rem 2.5rem 0.8rem 1rem;
  color: var(--text);
  caret-color: var(--gold-bright);
  background: rgba(15, 11, 30, 0.5);
  border: 1px solid rgba(216, 204, 234, 0.26);
  border-radius: 0.85rem;
  outline: none;
  font-size: 1.08rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

input::placeholder { color: #9e94af; opacity: 1; }
input:hover { border-color: rgba(225, 198, 137, 0.45); }

input:focus {
  border-color: var(--focus);
  background: rgba(15, 11, 30, 0.72);
  box-shadow: 0 0 0 0.22rem rgba(244, 218, 156, 0.14);
}

input[aria-invalid="true"] {
  border-color: var(--danger);
  box-shadow: 0 0 0 0.2rem rgba(255, 183, 189, 0.1);
}

.primary-button,
.copy-button {
  border: 0;
  cursor: pointer;
  font-weight: 750;
  transition: transform 150ms ease, background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.primary-button {
  min-height: 3.5rem;
  padding: 0.75rem 1.35rem;
  color: #1c142b;
  background: linear-gradient(135deg, var(--gold-bright), #d7b96f);
  border-radius: 0.85rem;
  box-shadow: 0 0.55rem 1.4rem rgba(12, 8, 24, 0.24);
}

.primary-button:hover {
  background: linear-gradient(135deg, #ffe8b5, #e2c47b);
  transform: translateY(-1px);
}

.primary-button:active,
.copy-button:active { transform: translateY(1px); }

.primary-button:focus-visible,
.copy-button:focus-visible,
.result-code:focus-visible,
.skip-link:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.field-hint,
.field-error {
  margin-bottom: 0;
  font-size: 0.82rem;
}

.field-hint { margin-top: 0.45rem; color: var(--text-muted); }

.field-error {
  min-height: 1.25rem;
  margin-top: 0.2rem;
  color: var(--danger);
}

.results {
  margin-top: 1.25rem;
  padding: clamp(1rem, 3.6vw, 1.75rem);
  border-radius: var(--radius-lg);
  animation: reveal 260ms ease-out both;
}

.results[hidden] { display: none; }

.section-heading { margin-bottom: 1rem; text-align: center; }

.section-heading h2 {
  margin-bottom: 0;
  font-size: clamp(1.65rem, 5vw, 2.35rem);
  line-height: 1.15;
}

.section-heading h2:focus { outline: none; }

.matrix {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.38rem, 1.5vw, 0.7rem);
}

.matrix-cell {
  display: flex;
  min-width: 0;
  min-height: clamp(5.15rem, 21vw, 8.6rem);
  padding: clamp(0.42rem, 1.7vw, 0.8rem);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(218, 204, 237, 0.16);
  border-radius: clamp(0.65rem, 2.6vw, 1rem);
  text-align: center;
}

.matrix-cell--core {
  background: linear-gradient(145deg, rgba(75, 54, 113, 0.76), rgba(48, 36, 76, 0.94));
  border-color: rgba(225, 198, 137, 0.3);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.matrix-cell--additional { background: rgba(19, 14, 37, 0.34); }

.matrix-cell--center {
  position: relative;
  background: transparent;
  border-color: rgba(225, 198, 137, 0.16);
}

.matrix-cell--center::before,
.matrix-cell--center::after {
  position: absolute;
  content: "";
  background: rgba(225, 198, 137, 0.22);
}

.matrix-cell--center::before { width: 56%; height: 1px; }
.matrix-cell--center::after { width: 1px; height: 56%; }

.matrix-orbit {
  position: relative;
  z-index: 1;
  display: grid;
  width: clamp(1.65rem, 7vw, 2.8rem);
  aspect-ratio: 1;
  place-items: center;
  color: var(--gold);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-size: clamp(0.62rem, 2vw, 0.85rem);
}

.matrix-cell h3 {
  width: 100%;
  min-width: 0;
  margin: 0 0 0.3rem;
  color: var(--text-muted);
  font-size: clamp(0.62rem, 2.25vw, 0.82rem);
  font-weight: 650;
  line-height: 1.16;
  overflow-wrap: anywhere;
}

.matrix-cell--core h3 { color: #ded5ea; }

.matrix-value {
  width: 100%;
  min-width: 0;
  margin: 0;
  color: var(--gold-bright);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.15rem, 7vw, 2.65rem);
  font-variant-numeric: lining-nums tabular-nums;
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.96;
  overflow-wrap: anywhere;
  word-break: break-all;
}

.matrix-cell--additional .matrix-value { color: var(--text); }

.result-code-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem 1rem;
  margin-top: clamp(1rem, 3vw, 1.5rem);
  padding: clamp(1rem, 3vw, 1.35rem);
  background: rgba(12, 8, 26, 0.55);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
}

.result-code-copy { min-width: 0; }

.result-code-label {
  margin-bottom: 0.35rem;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-code {
  display: block;
  max-width: 100%;
  padding: 0.15rem 0;
  color: var(--text);
  background: transparent;
  font-family: "Segoe UI", "Noto Sans", Arial, sans-serif;
  font-size: clamp(0.95rem, 3.3vw, 1.25rem);
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
  user-select: all;
}

.copy-button {
  display: inline-flex;
  min-width: 8.9rem;
  min-height: 3rem;
  padding: 0.68rem 0.9rem;
  align-self: center;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--gold-bright);
  background: rgba(225, 198, 137, 0.08);
  border: 1px solid var(--line-strong);
  border-radius: 0.75rem;
}

.copy-button:hover {
  background: rgba(225, 198, 137, 0.15);
  border-color: var(--gold);
}

.copy-button:disabled {
  cursor: wait;
  opacity: 0.78;
}

.copy-button svg {
  width: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.copy-status {
  min-height: 1.2rem;
  margin: -0.15rem 0 0;
  grid-column: 1 / -1;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(0.45rem); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 34rem) {
  .page-shell { width: min(100% - 1.25rem, var(--page-width)); padding-top: 2.25rem; }
  .intro { margin-bottom: 1.55rem; }
  .input-row { grid-template-columns: 1fr; }
  .primary-button { width: 100%; }
  .result-code-panel { grid-template-columns: 1fr; }
  .copy-button { width: 100%; }
  .copy-status { grid-column: 1; }
}

@media (max-width: 22rem) {
  .page-shell { width: min(100% - 0.75rem, var(--page-width)); }
  .calculator-panel,
  .results { border-radius: 1.1rem; }
  .matrix { gap: 0.28rem; }
  .matrix-cell { min-height: 4.8rem; padding-inline: 0.24rem; }
  .matrix-cell h3 { font-size: 0.58rem; }
  .matrix-value { font-size: clamp(1rem, 6.6vw, 1.45rem); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}