:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-accent: #0f1f35;
  --panel: rgba(12, 20, 34, 0.82);
  --panel-border: rgba(148, 163, 184, 0.18);
  --text: #e5eefc;
  --muted: #9db0cc;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --success: #34d399;
  --danger: #fb7185;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 36%),
    radial-gradient(circle at top right, rgba(52, 211, 153, 0.14), transparent 32%),
    linear-gradient(180deg, var(--bg) 0%, #050b14 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 85%);
}

.shell {
  width: min(1040px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

.hero {
  margin-bottom: 24px;
  max-width: 720px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 8px 12px;
  border: 1px solid rgba(125, 211, 252, 0.18);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.55);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
  max-width: 11ch;
}

.lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.card + .card {
  margin-top: 18px;
}

.card-header {
  margin-bottom: 20px;
}

.card-header h2 {
  margin: 0;
  font-size: 1.4rem;
}

.card-header p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 8px;
  color: #dce7f7;
  font-size: 0.95rem;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 14px;
  background: rgba(2, 6, 23, 0.64);
  color: var(--text);
  padding: 14px 15px;
  font: inherit;
  outline: none;
}

textarea {
  resize: vertical;
  min-height: 180px;
}

textarea:focus,
input:focus,
select:focus {
  border-color: rgba(125, 211, 252, 0.85);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.14);
}

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

.actions,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

button {
  border: none;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #032234;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
  box-shadow: 0 12px 26px rgba(56, 189, 248, 0.24);
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.7;
  cursor: progress;
  transform: none;
}

button.secondary {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: none;
}

.hint,
.small {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.result {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(148, 163, 184, 0.16);
  display: grid;
  gap: 14px;
}

.result-copy {
  display: grid;
  gap: 8px;
}

.result-copy input {
  font-size: 0.97rem;
}

.viewer-state {
  min-height: 160px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 12px 0;
}

.secret-box {
  width: 100%;
  text-align: left;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(52, 211, 153, 0.18);
  background: rgba(4, 120, 87, 0.12);
}

.secret-box pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font: inherit;
  line-height: 1.7;
}

.status {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  color: var(--success);
  font-weight: 700;
}

.error {
  color: var(--danger);
}

@media (max-width: 720px) {
  .shell {
    width: min(100vw - 24px, 1040px);
    padding: 20px 0 36px;
  }

  .card {
    padding: 18px;
    border-radius: 20px;
  }

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

  h1 {
    max-width: 14ch;
  }
}