*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0a;
  --bg-raised: #111;
  --border: #1e1e1e;
  --text: #c8c8c8;
  --text-dim: #666;
  --text-bright: #e8e8e8;
  --accent: #00d4aa;
  --red: #e84855;
  --mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  white-space: nowrap;
  letter-spacing: -0.3px;
}

.logo span { color: var(--accent); }

.nav-links { display: flex; gap: 16px; }
.nav-links a {
  font-size: 13px;
  color: var(--text-dim);
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

.loading {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-dim);
}

.loading .spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading p { font-size: 13px; }

.error-msg {
  text-align: center;
  padding: 60px 20px;
  color: var(--red);
  font-size: 13px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 16px 0;
  text-align: center;
}

footer p {
  font-size: 11px;
  color: var(--text-dim);
}

footer a { color: var(--text-dim); }
footer a:hover { color: var(--text); }

.nav-links a.active { color: var(--text-bright); }

.container-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* SSE cell flash: brief tint to show a value just changed. */
@keyframes flash-up {
  0%   { background: rgba(0, 212, 170, 0.28); }
  100% { background: transparent; }
}
@keyframes flash-down {
  0%   { background: rgba(232, 72, 85, 0.28); }
  100% { background: transparent; }
}
.flash      { animation: flash-up 0.8s ease-out; }
.flash-down { animation: flash-down 0.8s ease-out; }

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.tab {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-dim);
  cursor: pointer;
  border: none;
  background: transparent;
  border-bottom: 2px solid transparent;
  font-family: inherit;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text-bright);
  border-bottom-color: var(--accent);
}

/* Copy buttons */
.copy-btn {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-left: 4px;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 10px;
  vertical-align: middle;
  transition: color 0.15s, opacity 0.15s;
  background: none;
  border: none;
  padding: 0;
}
.copy-btn:hover { color: var(--accent); }
.copy-btn.copied { color: var(--accent); }
.copy-btn.copied::after { content: ' copied'; font-size: 10px; }

/* Utility buttons */
.btn {
  font-family: inherit;
  font-size: 12px;
  line-height: 1;
  padding: 8px 14px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  border-radius: 3px;
  letter-spacing: 0.2px;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
  white-space: nowrap;
}
.btn:hover {
  border-color: var(--text-dim);
  color: var(--text-bright);
  background: #151515;
}
.btn:active { background: #0c0c0c; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #001914;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover {
  background: #00b894;
  border-color: #00b894;
  color: #001914;
}
.btn-primary:active { background: #00997a; border-color: #00997a; }

.btn-danger {
  color: var(--red);
  border-color: #3a1e21;
  background: #1a0d0f;
}
.btn-danger:hover {
  color: #fff;
  border-color: var(--red);
  background: var(--red);
}

.btn-sm { padding: 5px 10px; font-size: 11px; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: 24px;
  width: min(420px, 90vw);
  font-family: var(--sans);
}
.modal h2 { font-size: 15px; color: var(--text-bright); margin-bottom: 12px; }
.modal .form-row { margin-bottom: 12px; }
.modal label {
  display: block;
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.modal input, .modal select {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
}
.modal input:focus, .modal select:focus { outline: none; border-color: var(--text-dim); }
.modal .actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}
.modal .modal-close {
  float: right;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}
.modal .modal-close:hover { color: var(--text); }
.modal .msg-ok  { color: var(--accent); font-size: 12px; margin-top: 8px; }
.modal .msg-err { color: var(--red);    font-size: 12px; margin-top: 8px; }