:root {
  --bg: #f8f8f4;
  --panel: #ffffff;
  --border: #d7d9d0;
  --text: #1f2421;
  --muted: #516258;
  --accent: #0c6e4f;
  --accent-2: #0a5d43;
  --warn: #9d2f2f;
  --ok: #1f7a36;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #edf3d8, var(--bg) 55%);
  min-height: 100vh;
}

.locked {
  overflow: hidden;
}

.app-shell.is-hidden {
  display: none;
}

.is-hidden {
  display: none !important;
}

.auth-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(19, 26, 22, 0.55);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 10;
}

.auth-modal {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.auth-modal h2 {
  margin: 0;
  font-size: 1.25rem;
}

.auth-modal p {
  margin: 0 0 0.3rem;
  color: var(--muted);
}

.auth-error {
  min-height: 1.2rem;
  margin: 0.2rem 0 0;
  color: var(--warn);
  font-size: 0.9rem;
}

.topbar {
  padding: 1rem 1.25rem 0.5rem;
}

.topbar h1 {
  margin: 0;
  font-size: 1.5rem;
}

.topbar p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.layout {
  display: grid;
  gap: 1rem;
  grid-template-columns: 300px 1fr;
  padding: 0.75rem 1.25rem 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.controls h2 {
  margin: 0;
  font-size: 1rem;
}

label {
  font-size: 0.85rem;
  color: var(--muted);
}

input,
button {
  font: inherit;
}

input {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 0.5rem 0.55rem;
}

button {
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 0.55rem 0.75rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button:hover {
  background: var(--accent-2);
}

button:disabled {
  background: #95b6aa;
  cursor: not-allowed;
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-height: 48vh;
  overflow: auto;
}

.file-list button {
  width: 100%;
  text-align: left;
  background: #f2f6f1;
  color: #1f2421;
  border: 1px solid #e0e5dc;
}

.file-list button:hover,
.file-list button.active {
  background: #deebd7;
  border-color: #bfd4b5;
}

.editor-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.editor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.current-file-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  border: 1px solid #c8d6c2;
  background: #eef5ea;
  color: #25412f;
}

#file-version-badge {
  cursor: pointer;
  user-select: none;
}

.version-badge-label {
  font-size: 0.74rem;
  opacity: 0.8;
}

.version-badge-value {
  font-size: 0.85rem;
  font-weight: 600;
}

.version-input {
  width: 7rem;
  padding: 0.3rem 0.45rem;
}

.actions {
  display: flex;
  gap: 0.5rem;
}

.editor {
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 58vh;
  overflow: hidden;
}

.messages h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

#validation-list {
  margin: 0;
  padding-left: 1.15rem;
}

#validation-list li {
  margin: 0.2rem 0;
}

#validation-list li.error {
  color: var(--warn);
}

#validation-list li.ok {
  color: var(--ok);
}

.status-bar {
  padding: 0.65rem 1.25rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.snackbar {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%) translateY(20px);
  opacity: 0;
  background: #1f2421;
  color: #fff;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
  pointer-events: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
  z-index: 30;
  max-width: min(90vw, 600px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.snackbar.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.snackbar.success {
  background: #186133;
}

.snackbar.error {
  background: #8f2424;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .file-list {
    max-height: 24vh;
  }

  .editor {
    min-height: 52vh;
  }
}