:root {
  color-scheme: light dark;
  --bg: #0f1419;
  --panel: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #9aa7b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --error: #f87171;
  --mono: "Consolas", "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: linear-gradient(160deg, #0b1020 0%, #121826 100%);
  color: var(--text);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.header h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 24px 0 16px;
}

.tab {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
}

.env-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.decrypt-source {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.env-toggle {
  display: flex;
  gap: 8px;
}

.env-option {
  display: inline-flex;
  cursor: pointer;
}

.env-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.env-option span {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
}

.env-option input:checked + span {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent);
  color: var(--text);
}

.label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.field {
  display: block;
  margin-bottom: 16px;
}

input[type="text"],
textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0f1724;
  color: var(--text);
  font: inherit;
}

textarea,
#single-b64,
#double-b64 {
  font-family: var(--mono);
  font-size: 0.85rem;
  resize: vertical;
}

.site-link-field {
  flex: 1;
  min-width: 0;
  min-height: 6.5rem;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0f1724;
}

.site-link-field[data-state="empty"] .site-link-output {
  display: none;
}

.site-link-output {
  display: block;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.45;
  word-break: break-all;
  text-decoration: underline;
}

.site-link-output:hover {
  color: var(--accent-hover);
}

.primary-btn {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.primary-btn:hover {
  background: var(--accent-hover);
}

.results-block {
  margin-top: 20px;
}

.results-block h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.result-field + .result-field {
  margin-top: 12px;
}

.output-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.output-row textarea,
.output-row input {
  flex: 1;
}

.copy-btn {
  flex-shrink: 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.copy-btn:hover {
  border-color: var(--accent);
}

.hidden {
  display: none !important;
}

.error {
  color: var(--error);
  margin: 0;
}

@media (max-width: 600px) {
  .env-panel {
    flex-direction: column;
    align-items: stretch;
  }

  .output-row {
    flex-direction: column;
  }

  .copy-btn {
    width: 100%;
  }
}