:root {
  --bg: #101a17;
  --card-bg: #16221e;
  --border: #24352f;
  --text: #e7f1ed;
  --text-muted: #93a8a0;
  --accent: #1f9d6e;
  --accent-hover: #22b47b;
  --warning: #d6a531;
  --error: #e0605a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 1.5rem;
}

.card {
  width: 100%;
  max-width: 32rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 2rem;
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
  color: var(--accent);
}

.subtitle {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

textarea,
input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text);
  padding: 0.6rem 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
}

textarea:focus,
input[type="text"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

button {
  font-family: inherit;
  font-size: 0.95rem;
  border: none;
  border-radius: 0.5rem;
  padding: 0.65rem 1.2rem;
  cursor: pointer;
  background: var(--accent);
  color: #06251a;
  font-weight: 600;
  margin-top: 1rem;
}

button:hover {
  background: var(--accent-hover);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.url-row {
  display: flex;
  gap: 0.5rem;
}

.url-row input {
  flex: 1;
}

.url-row button {
  margin-top: 0;
  flex: none;
}

.warning {
  font-size: 0.85rem;
  color: var(--warning);
  margin: 1rem 0 0;
}

.error {
  font-size: 0.85rem;
  color: var(--error);
  margin: 0.75rem 0 0;
  min-height: 1.2em;
}

.secret-box {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  font-family: ui-monospace, monospace;
  font-size: 0.95rem;
}

.mode-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.mode-tab {
  margin-top: 0;
  background: transparent;
  color: var(--text-muted);
  border-radius: 0.5rem 0.5rem 0 0;
  padding: 0.5rem 1rem;
  border-bottom: 2px solid transparent;
}

.mode-tab:hover {
  background: transparent;
  color: var(--text);
}

.mode-tab.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

input[type="file"] {
  display: block;
  width: 100%;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.file-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0.4rem 0 0;
}

.file-info {
  font-size: 0.85rem;
  color: var(--text);
  margin-top: 0.5rem;
}

.file-result-name {
  margin: 0 0 0.75rem;
  word-break: break-word;
}

.file-result-preview {
  display: block;
  max-width: 100%;
  max-height: 20rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  margin-bottom: 0.75rem;
}