:root {
  color-scheme: light;
  --bg: #f2f5f8;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --line: #d7dde5;
  --accent: #155eef;
  --accent-dark: #0f4cd4;
  --danger: #b42318;
  --ok: #067647;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.topbar {
  align-items: center;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 18px clamp(16px, 4vw, 40px);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 22px;
  font-weight: 700;
}

h2 {
  font-size: 16px;
}

p {
  color: var(--muted);
  margin-top: 4px;
}

.status {
  border: 1px solid var(--line);
  border-radius: 6px;
  min-width: 120px;
  padding: 8px 12px;
  text-align: center;
}

.status.ok {
  background: #ecfdf3;
  border-color: #9ed9b8;
  color: var(--ok);
  font-weight: 700;
}

.status.error {
  background: #fef3f2;
  border-color: #f3b7b2;
  color: var(--danger);
  font-weight: 700;
}

.layout {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  padding: 20px clamp(16px, 4vw, 40px) 40px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
  padding: 16px;
}

.panel-head {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-bottom: 14px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.output-panel {
  grid-column: 1 / -1;
}

label {
  color: var(--muted);
  display: grid;
  font-weight: 600;
  gap: 6px;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  min-width: 0;
  padding: 9px 10px;
  width: 100%;
}

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

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(17, 103, 177, 0.14);
  outline: none;
}

button {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 8px 12px;
}

button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

button.primary:hover {
  background: var(--accent-dark);
  color: #ffffff;
}

.file-button {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 700;
  justify-content: center;
  margin-left: auto;
  padding: 8px 12px;
}

.file-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#privateKeyFileInput {
  display: none;
}

.form-grid,
.result-grid {
  display: grid;
  gap: 12px;
}

.form-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.result-grid {
  grid-template-columns: 130px minmax(0, 1fr);
}

.result-grid span {
  color: var(--muted);
}

code,
pre {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow: auto;
  padding: 8px;
}

pre {
  margin: 14px 0 0;
  max-height: 260px;
  white-space: pre-wrap;
}

.toast {
  background: #17202a;
  border-radius: 6px;
  bottom: 20px;
  color: #ffffff;
  left: 50%;
  max-width: min(560px, calc(100vw - 32px));
  padding: 10px 14px;
  position: fixed;
  transform: translateX(-50%);
  z-index: 10;
}

.toast.error {
  background: var(--danger);
}

@media (max-width: 820px) {
  .topbar,
  .layout {
    display: grid;
  }

  .layout,
  .form-grid {
    grid-template-columns: 1fr;
  }

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

  .file-button {
    margin-left: 0;
  }

  .button-row {
    justify-content: flex-start;
  }
}