:root {
  --bg-0: #0b1210;
  --bg-1: #12201b;
  --ink: #e8f2ec;
  --ink-dim: #9bb0a4;
  --accent: #3dffa8;
  --accent-2: #c8f56a;
  --danger: #ff7a6e;
  --line: rgba(232, 242, 236, 0.12);
  --panel: rgba(14, 24, 20, 0.72);
  --font-display: "Syne", sans-serif;
  --font-body: "DM Sans", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 14px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--bg-0);
  overflow-x: hidden;
}

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

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 10% -10%, #1a3a2e 0%, transparent 55%),
    radial-gradient(90% 70% at 100% 20%, #243018 0%, transparent 50%),
    linear-gradient(165deg, var(--bg-0), var(--bg-1) 55%, #0a100e);
}

.atmosphere__grid {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(232, 242, 236, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 242, 236, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 40% 20%, #000 20%, transparent 70%);
  animation: grid-drift 28s linear infinite;
}

.atmosphere__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.45;
}

.atmosphere__glow--a {
  width: 280px;
  height: 280px;
  top: 12%;
  left: 8%;
  background: rgba(61, 255, 168, 0.28);
  animation: pulse-a 7s ease-in-out infinite;
}

.atmosphere__glow--b {
  width: 320px;
  height: 320px;
  right: -40px;
  bottom: 10%;
  background: rgba(200, 245, 106, 0.18);
  animation: pulse-b 9s ease-in-out infinite;
}

@keyframes grid-drift {
  from { transform: translateY(0); }
  to { transform: translateY(48px); }
}

@keyframes pulse-a {
  0%, 100% { transform: scale(1); opacity: 0.35; }
  50% { transform: scale(1.12); opacity: 0.55; }
}

@keyframes pulse-b {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.25; }
  50% { transform: translateY(-16px) scale(1.08); opacity: 0.42; }
}

.shell {
  position: relative;
  z-index: 1;
  width: min(720px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(40px, 10vh, 96px) 0 64px;
}

.brand {
  margin-bottom: 36px;
  animation: rise 0.7s ease-out both;
}

.brand__mark {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 8vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.brand__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand__lede {
  margin: 12px 0 0;
  max-width: 36ch;
  color: var(--ink-dim);
  font-size: 1rem;
  line-height: 1.5;
}

.panel {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  animation: rise 0.7s ease-out 0.08s both;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
}

.field {
  display: grid;
  gap: 6px;
  min-width: 96px;
}

.field span {
  color: var(--ink-dim);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field input,
.field select {
  width: 100%;
  min-width: 96px;
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  font: 500 1rem var(--font-mono);
  background: rgba(0, 0, 0, 0.28);
}

.field select {
  font-family: var(--font-body);
  cursor: pointer;
  max-width: 100%;
}

.field select optgroup {
  font-weight: 700;
  color: var(--ink-dim);
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(61, 255, 168, 0.55);
  outline-offset: 1px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 0 0 20px;
  animation: rise 0.7s ease-out 0.04s both;
}

.tabs__btn {
  height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-dim);
  font: 600 0.85rem var(--font-body);
  background: transparent;
  cursor: pointer;
}

.tabs__btn.is-active {
  color: #06140e;
  border-color: transparent;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}

.panel__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.panel--spaced {
  margin-top: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field--wide {
  grid-column: 1 / -1;
}

.controls--form {
  grid-column: 1 / -1;
}

.code-out {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid rgba(61, 255, 168, 0.35);
  border-radius: 12px;
  background: rgba(61, 255, 168, 0.06);
}

.code-out__label {
  margin: 0 0 6px;
  color: var(--ink-dim);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.code-out__value {
  margin: 0;
  overflow-wrap: anywhere;
  font: 500 1.05rem/1.4 var(--font-mono);
  color: var(--accent);
  text-transform: lowercase;
}

.code-input {
  text-transform: lowercase;
}

.code-out__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.decode-card {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.22);
}

.decode-card > div {
  display: grid;
  gap: 2px;
}

.decode-card dt {
  color: var(--ink-dim);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.decode-card dd {
  margin: 0;
  overflow-wrap: anywhere;
  font: 500 0.95rem/1.4 var(--font-mono);
}

.spec {
  margin: 18px 0 0;
  color: var(--ink-dim);
  font-size: 0.8rem;
  line-height: 1.5;
}

@media (max-width: 520px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.btn {
  height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  font: 700 0.95rem var(--font-body);
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.15s ease;
}

.btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn--primary {
  color: #06140e;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}

.btn--primary:hover:not(:disabled) {
  filter: brightness(1.05);
}

.btn--ghost {
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
}

.btn--ghost:hover:not(:disabled) {
  border-color: rgba(255, 122, 110, 0.55);
  color: var(--danger);
}

.hint {
  min-height: 1.25em;
  margin: 14px 0 0;
  color: var(--ink-dim);
  font-size: 0.88rem;
}

.results {
  margin-top: 28px;
  animation: rise 0.7s ease-out 0.16s both;
}

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

.results__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.results__count {
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.results__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.results__empty {
  margin: 0;
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--ink-dim);
  font-size: 0.92rem;
  line-height: 1.45;
}

.results__empty[hidden],
.results__list:empty + .results__empty {
  /* empty handled in JS */
}

.row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 12px 12px 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(8, 14, 12, 0.55);
  animation: row-in 0.28s ease-out both;
}

.row__id {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--ink);
  font: 500 0.86rem/1.4 var(--font-mono);
}

.row__btn {
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-dim);
  font: 600 0.78rem var(--font-body);
  background: transparent;
  cursor: pointer;
}

.row__btn:hover {
  color: var(--ink);
  border-color: rgba(61, 255, 168, 0.45);
}

.row__btn--danger:hover {
  color: var(--danger);
  border-color: rgba(255, 122, 110, 0.55);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes row-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.foot {
  margin-top: 48px;
  color: var(--ink-dim);
  font-size: 0.8rem;
}

.foot p {
  margin: 0;
}

@media (max-width: 520px) {
  .row {
    grid-template-columns: 1fr;
  }

  .row__btn {
    width: 100%;
  }
}