:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --border: #222;
  --text: #e0e0e0;
  --text-muted: #777;
  --accent: #4fc3f7;
  --accent-dim: #1a3a4a;
  --success: #66bb6a;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  height: 100vh;
}

body:has(.landing-page) {
  overflow: auto;
}

body:has(.app) {
  overflow: hidden;
}

/* ── App layout ── */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── Tab bar ── */
.tab-bar {
  display: flex;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 8px;
  height: 48px;
  flex-shrink: 0;
  overflow-x: auto;
  gap: 2px;
}

.tab-bar::-webkit-scrollbar { height: 0; }

.tab {
  padding: 8px 20px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
  height: 100%;
  display: flex;
  align-items: center;
}

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

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-close {
  margin-left: 8px;
  font-size: 1rem;
  line-height: 1;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.15s, color 0.15s;
  pointer-events: auto;
}

.tab:hover .tab-close {
  opacity: 1;
}

.tab-close:hover {
  color: #e55;
}

.tab-add {
  color: var(--text-muted);
  font-size: 1.1rem;
  padding: 8px 14px;
}

.tab-add:hover {
  color: var(--accent);
}

/* ── Main content area ── */
.main {
  flex: 1;
  overflow: auto;
}

.home-view {
  padding: 40px 24px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.home-content {
  width: 100%;
  max-width: 1200px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Endpoint banner ── */
.endpoint-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
}

.endpoint-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.endpoint-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.endpoint-url {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--accent);
  font-family: monospace;
  overflow-x: auto;
  white-space: nowrap;
}

.btn-copy {
  padding: 10px 20px;
  flex-shrink: 0;
}

.endpoint-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.display-view {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
  width: 100%;
  max-width: 1200px;
}

.device-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0;
  text-decoration: none;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.device-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.device-card .name {
  font-size: 1rem;
  font-weight: 600;
}

.device-card .status {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.device-card .status.has-content {
  color: var(--success);
}

/* ── Card preview ── */
.card-preview {
  padding: 16px 18px;
  height: 200px;
  overflow: hidden;
  position: relative;
  font-size: 0.75rem;
  line-height: 1.5;
}

.card-preview::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: linear-gradient(transparent, var(--surface));
  pointer-events: none;
}

.preview-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.preview-text {
  white-space: pre-wrap;
  color: var(--text);
}

.preview-markdown h1 { font-size: 1.1rem; margin-bottom: 8px; color: var(--accent); }
.preview-markdown h2 { font-size: 0.95rem; margin: 10px 0 6px; }
.preview-markdown h3 { font-size: 0.85rem; margin: 8px 0 4px; }
.preview-markdown p { margin-bottom: 6px; }
.preview-markdown table { border-collapse: collapse; width: 100%; margin: 6px 0; }
.preview-markdown th, .preview-markdown td { border: 1px solid var(--border); padding: 3px 6px; text-align: left; font-size: 0.7rem; }
.preview-markdown th { background: var(--bg); }
.preview-markdown ul, .preview-markdown ol { padding-left: 16px; margin: 4px 0; }
.preview-markdown blockquote { border-left: 2px solid var(--accent); padding-left: 8px; color: var(--text-muted); margin: 6px 0; }
.preview-markdown code { background: var(--bg); padding: 1px 4px; border-radius: 3px; font-size: 0.7em; }
.preview-markdown pre { background: var(--bg); padding: 8px; border-radius: 4px; overflow: hidden; margin: 6px 0; }
.preview-markdown a { color: var(--accent); }
.preview-markdown hr { border: none; border-top: 1px solid var(--border); margin: 8px 0; }

.preview-list-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}

.preview-list-item .check {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-radius: 3px;
  flex-shrink: 0;
}

.preview-list-item.checked .check {
  background: var(--accent);
  border-color: var(--accent);
}

.preview-more {
  color: var(--text-muted);
  font-style: italic;
  padding-top: 4px;
}

.preview-dashboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.preview-dash-card {
  background: var(--bg);
  border-radius: 6px;
  padding: 10px;
}

.preview-dash-card .title {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.preview-dash-card .value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

/* ── Display content ── */
.content {
  width: 100%;
  max-width: 900px;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Text */
.content-text {
  font-size: clamp(1.2rem, 3vw, 2rem);
  line-height: 1.6;
  white-space: pre-wrap;
}

/* Markdown */
.content-markdown h1 { font-size: 2rem; margin-bottom: 16px; color: var(--accent); }
.content-markdown h2 { font-size: 1.5rem; margin: 24px 0 12px; color: var(--text); }
.content-markdown h3 { font-size: 1.2rem; margin: 20px 0 8px; }
.content-markdown p { margin-bottom: 12px; line-height: 1.7; }
.content-markdown ul, .content-markdown ol { margin: 12px 0; padding-left: 24px; }
.content-markdown li { margin-bottom: 6px; line-height: 1.6; }
.content-markdown code { background: var(--surface); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.content-markdown pre { background: var(--surface); padding: 16px; border-radius: 8px; overflow-x: auto; margin: 16px 0; }
.content-markdown pre code { background: none; padding: 0; }
.content-markdown blockquote { border-left: 3px solid var(--accent); padding-left: 16px; color: var(--text-muted); margin: 16px 0; }
.content-markdown table { border-collapse: collapse; width: 100%; margin: 16px 0; }
.content-markdown th, .content-markdown td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.content-markdown th { background: var(--surface); }
.content-markdown a { color: var(--accent); }

/* List */
.content-list { list-style: none; font-size: 1.1rem; }
.content-list li {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.content-list li .check {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 4px;
  flex-shrink: 0;
}
.content-list li.checked .check {
  background: var(--accent);
  border-color: var(--accent);
}

/* Dashboard cards */
.content-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.dash-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.dash-card .title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.dash-card .value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.dash-card .subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Waiting state */
.waiting {
  text-align: center;
  color: var(--text-muted);
}

.waiting .device-name {
  font-size: 1.4rem;
  color: var(--text);
  margin-bottom: 8px;
  text-transform: capitalize;
}

.waiting .pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
  margin-right: 8px;
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* HTML iframe */
.content-html {
  width: 100%;
  height: 80vh;
  border: none;
  border-radius: 8px;
  background: white;
}

/* URL iframe */
.content-url {
  width: 100%;
  height: calc(100vh - 128px);
  border: none;
  border-radius: 8px;
  background: white;
}

/* Image */
.content-image-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.content-image {
  max-width: 100%;
  max-height: calc(100vh - 128px);
  border-radius: 8px;
  object-fit: contain;
}

/* Preview: URL */
.preview-url {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 8px;
}

.preview-url-icon {
  font-size: 2rem;
}

.preview-url-text {
  color: var(--accent);
  font-size: 0.7rem;
  word-break: break-all;
  text-align: center;
}

/* Preview: Image */
.preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0 0 11px 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(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  min-width: 320px;
}

.modal h2 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.modal input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  margin-bottom: 16px;
}

.modal input:focus {
  border-color: var(--accent);
}

.modal .actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.btn {
  padding: 8px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  font-weight: 600;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-danger {
  background: #e55;
  color: #fff;
  font-weight: 600;
}

.btn-large {
  padding: 14px 40px;
  font-size: 1.1rem;
  border-radius: 10px;
}

/* ── Landing page ── */
.landing-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 24px 40px;
  text-align: center;
}

.landing-hero {
  max-width: 560px;
  margin-bottom: 60px;
}

.landing-hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.landing-hero .tagline {
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 12px;
}

.landing-hero .description {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.landing-features {
  display: flex;
  gap: 32px;
  max-width: 700px;
  margin-bottom: 48px;
}

.feature {
  flex: 1;
  text-align: center;
}

.feature-title {
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Landing: Example conversation ── */
.landing-example-conversation {
  max-width: 560px;
  width: 100%;
  margin-bottom: 60px;
  text-align: left;
}

.example-convo-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-align: center;
}

.example-convo {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.convo-bubble {
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.convo-bubble.user {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--text);
  font-style: italic;
  align-self: flex-end;
  max-width: 90%;
}

.convo-bubble.ai {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  align-self: flex-start;
  max-width: 90%;
}

.example-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.example-more-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  width: 100%;
  margin-bottom: 2px;
}

.example-prompt-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Landing: How it works ── */
.how-heading {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
  text-align: center;
}

.landing-how-it-works {
  max-width: 800px;
  width: 100%;
  margin-bottom: 48px;
}

.steps-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-top: 24px;
}

.step {
  flex: 1;
  text-align: center;
}

.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.step-title {
  font-weight: 600;
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.step-arrow {
  color: var(--text-muted);
  font-size: 1.3rem;
  padding-top: 8px;
  flex-shrink: 0;
}

/* ── Landing: Bottom CTA ── */
.landing-cta-bottom {
  margin-bottom: 60px;
}

/* ── Bookmark banner ── */
.bookmark-banner {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.bookmark-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.bookmark-text {
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.5;
}

.bookmark-dismiss {
  flex-shrink: 0;
}

/* ── Setup instructions ── */
.setup-instructions {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.setup-heading {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.setup-intro {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.setup-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.setup-tab {
  padding: 8px 20px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.setup-tab:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.setup-tab.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.setup-steps {
  padding-left: 20px;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text);
}

.setup-steps a {
  color: var(--accent);
}

.setup-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
  padding: 10px 14px;
  background: var(--bg);
  border-radius: 6px;
  border-left: 3px solid var(--accent);
  line-height: 1.5;
}

.setup-codeblock {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  margin: 8px 0 12px;
}

.btn-copy-config {
  margin-bottom: 12px;
}

.setup-try {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.setup-try-heading {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.setup-try p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.setup-prompts {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.setup-prompt-example {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Back to landing link ── */
.back-link {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-decoration: none;
  padding: 8px 14px;
  margin-right: auto;
  transition: color 0.2s;
}

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

@media (max-width: 600px) {
  .landing-features { flex-direction: column; gap: 24px; }
  .landing-hero h1 { font-size: 2rem; }
  .steps-row { flex-direction: column; gap: 24px; }
  .step-arrow { display: none; }
}