/* FirstBits — stylesheet */

:root {
  --color-bg:         #0d1117;
  --color-surface:    #161b22;
  --color-border:     #30363d;
  --color-text:       #e6edf3;
  --color-muted:      #8b949e;
  --color-accent:     #f7931a;   /* Bitcoin orange */
  --color-accent-dim: #c97b14;
  --color-ok:         #3fb950;
  --color-warn:       #d29922;
  --color-error:      #f85149;
  --color-code-bg:    #1f2428;
  --radius:           6px;
  --font-mono:        "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

/* ---- Layout ---- */

header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  transition: color 0.15s;
}
nav a:hover { color: var(--color-text); }

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.tagline {
  color: var(--color-muted);
  margin-bottom: 2.5rem;
  font-size: 0.95rem;
}

/* ---- Mode selector ---- */

.mode-selector {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.mode-selector label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: color 0.15s;
}
.mode-selector label:has(input:checked) { color: var(--color-text); }

/* ---- Input row ---- */

.input-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

#lookup-input {
  flex: 1;
  padding: 0.6rem 0.8rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 1rem;
  font-family: var(--font-mono);
  outline: none;
  transition: border-color 0.15s;
}
#lookup-input:focus { border-color: var(--color-accent); }

#lookup-btn {
  padding: 0.6rem 1.2rem;
  background: var(--color-accent);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
#lookup-btn:hover:not(:disabled) { background: var(--color-accent-dim); }
#lookup-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Result / Error boxes ---- */

#result-box, #error-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

#error-box {
  border-color: var(--color-error);
  color: var(--color-error);
}

.loading {
  color: var(--color-muted);
  font-style: italic;
}

/* ---- Verification banner ---- */

.verify-ok, .verify-warn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  padding: 0.4rem 0.6rem;
  border-radius: calc(var(--radius) - 1px);
  margin-bottom: 1rem;
}
.verify-ok   { background: rgba(63, 185, 80, 0.12); color: var(--color-ok); }
.verify-warn { background: rgba(210, 153, 34, 0.12); color: var(--color-warn); }

/* ---- Result rows ---- */

.result-row {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--color-border);
}
.result-row:last-child { border-bottom: none; }

.result-label {
  flex-shrink: 0;
  width: 130px;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.result-address, .result-firstbits {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  word-break: break-all;
  background: var(--color-code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  flex: 1;
}

.result-address { color: var(--color-accent); }
.result-firstbits { color: var(--color-ok); }

.result-meta {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.result-source { opacity: 0.7; font-size: 0.85rem; }

/* ---- Copy button ---- */

.copy-btn {
  flex-shrink: 0;
  padding: 0.2rem 0.6rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.copy-btn:hover { color: var(--color-text); border-color: var(--color-text); }

/* ---- WalletExplorer cross-check ---- */

#crosscheck-box {
  margin-top: 0.75rem;
}

.crosscheck-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.85rem 1.25rem;
}

.crosscheck-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 0.6rem;
}

.crosscheck-ext-link {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s;
}
.crosscheck-ext-link:hover { color: var(--color-text); }

.crosscheck-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.crosscheck-address {
  font-size: 0.9rem;
}

.crosscheck-match {
  font-size: 0.8rem;
  color: var(--color-ok);
  white-space: nowrap;
}

.crosscheck-mismatch {
  font-size: 0.8rem;
  color: var(--color-warn);
  font-weight: 600;
  white-space: nowrap;
}

.crosscheck-unavail {
  font-size: 0.85rem;
  color: var(--color-muted);
  font-style: italic;
}

/* ---- Config page ---- */

.config-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.config-section h2 {
  font-size: 1rem;
  margin: 0 0 1rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.config-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}
.config-field label {
  font-size: 0.85rem;
  color: var(--color-muted);
}
.config-field input, .config-field select {
  padding: 0.5rem 0.7rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.95rem;
  font-family: var(--font-mono);
  outline: none;
}
.config-field input:focus, .config-field select:focus {
  border-color: var(--color-accent);
}

.save-btn {
  padding: 0.5rem 1.25rem;
  background: var(--color-accent);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.save-btn:hover { background: var(--color-accent-dim); }

.status-msg {
  font-size: 0.85rem;
  margin-top: 0.5rem;
}
.status-ok   { color: var(--color-ok); }
.status-fail { color: var(--color-error); }

footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 2rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-align: center;
}