:root {
  --bg: #1a1a1a;
  --bg-panel: #242424;
  --bg-input: #2e2e2e;
  --bg-gradient-start: #1a1a1a;
  --bg-gradient-end: #333333;
  --text-primary: #d4d4d4;
  --text-secondary: #888888;
  --text-tertiary: #666666;
  --accent: #888888;
  --accent-hover: #aaaaaa;
  --accent-muted: rgba(136, 136, 136, 0.15);
  --accent-muted-hover: rgba(136, 136, 136, 0.25);
  --border: rgba(255, 255, 255, 0.08);
  --border-accent: #666666;
  --header-height: 4rem;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  --font-sans: "Roboto", system-ui, sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100dvh;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 20px;
}

.mono-medium {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hidden {
  display: none !important;
}

.layout {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(80, 80, 80, 0.2) 0%, transparent 60%),
    var(--bg);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  animation: fade-in 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 1.5rem;
  max-width: 100%;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  background: var(--bg-input);
  cursor: pointer;
}

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

.mobile-menu-btn {
  display: none;
}

.nav {
  display: flex;
  flex: 1;
  align-items: center;
  margin-left: -0.5rem;
}

.nav-close {
  display: none;
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: var(--header-height);
}

.nav-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

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

.nav-tab.active {
  color: var(--text-primary);
}

.nav-tab.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  cursor: pointer;
}

.ascii-logo {
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 3px;
  line-height: 1.05;
  color: #b0b0b0;
  white-space: pre;
  letter-spacing: 0;
  user-select: none;
}

.header-user {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
}

.header-actions {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
}

.chat-counter {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 10px;
  white-space: nowrap;
}

.chat-counter.verified {
  border-color: var(--accent);
  color: var(--accent-hover);
}

.chat-counter.exhausted {
  border-color: #994444;
  color: #cc6666;
}

.x-btn {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}

.x-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

.wallet-btn {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border-accent);
  background: transparent;
  color: var(--accent-hover);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.wallet-btn:hover:not(:disabled) {
  background: var(--accent-muted);
}

.wallet-btn:disabled {
  opacity: 0.6;
  cursor: wait;
}

.wallet-btn.connected {
  border-color: var(--accent);
  color: var(--text-primary);
}

.wallet-btn.connected.verified {
  background: var(--accent-muted);
  border-color: var(--accent-hover);
  color: var(--accent-hover);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.65);
}

.modal {
  width: 100%;
  max-width: 24rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--bg-panel);
}

.modal h4 {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
}

.modal-text {
  margin: 0 0 1.25rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.modal-dismiss {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
}

.modal-dismiss:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

.user-name {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: right;
}

.profile-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--border);
  background: var(--bg-input);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Main */
.main {
  flex: 1;
  display: flex;
}

.page {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(
    180deg,
    var(--bg-gradient-start) 0%,
    #222 12.5%,
    #252525 25%,
    #282828 37.5%,
    #2a2a2a 50%,
    #2c2c2c 62.5%,
    #2e2e2e 75%,
    #303030 87.5%,
    var(--bg-gradient-end) 100%
  );
}

.page-content {
  display: flex;
  flex-direction: column;
  flex: 1;
  max-width: 50rem;
}

.page-header {
  display: flex;
  flex-direction: column;
  margin-top: 2.5rem;
  margin-bottom: 2rem;
}

.page-header h4 {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
}

.page-details {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.comment {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.suggestion {
  align-self: flex-start;
  margin-top: 0.25rem;
  padding: 0.2rem 0.5rem;
  border: none;
  border-left: 2px solid transparent;
  background: var(--accent-muted);
  color: var(--accent-hover);
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.suggestion:hover {
  background: var(--accent-muted-hover);
  border-left-color: var(--border-accent);
}

/* Responses */
.responses {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.response {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  overflow: hidden;
}

.response-user {
  border-left: 2px solid var(--text-tertiary);
}

.response-bot {
  border-left: 2px solid var(--accent);
}

.response-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.response-bot .response-header {
  color: var(--accent-hover);
}

.response-body {
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

.response-body.typing::after {
  content: "▋";
  animation: blink 0.8s step-end infinite;
  color: var(--accent);
}

/* Input */
.input-box {
  margin-top: 0.5rem;
  padding-bottom: 1rem;
  border: 1px solid var(--border);
  background: var(--bg-input);
  transition: border-color 0.2s;
}

.input-box.processing {
  opacity: 0.7;
  pointer-events: none;
}

.attached-files {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 1rem 0;
}

.file-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.4rem;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.file-tag button {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0;
  font-size: 14px;
  line-height: 1;
}

.file-tag button:hover {
  color: var(--text-primary);
}

.editable {
  margin: 1rem 1rem 0;
}

.editable textarea {
  width: 100%;
  min-height: 4.5rem;
  max-height: 50vh;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text-primary);
  resize: none;
  outline: none;
}

.editable textarea::placeholder {
  color: var(--text-tertiary);
}

.input-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1rem 0;
}

.attach {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 15rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border-accent);
  background: transparent;
  color: var(--accent-hover);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.attach:hover {
  background: var(--accent-muted);
}

.attach.attached {
  background: var(--accent);
  color: var(--bg);
}

.attach img {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.attach span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attach-files {
  max-width: none;
}

.folder-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  background-color: var(--accent);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'%3E%3Cpath d='M10 4H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V8c0-1.1-.9-2-2-2h-8l-2-2z'/%3E%3C/svg%3E") center/contain no-repeat;
}

.attach.attached .folder-icon {
  background-color: var(--bg);
}

.solve {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  padding: 0;
  border: none;
  background: var(--accent);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.solve:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: scale(1.05);
}

.solve:disabled {
  background: #555;
  cursor: not-allowed;
}

.bottom-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.bottom-comment {
  flex: 1;
}

/* History / Docs panels */
.history-list,
.docs-list {
  display: flex;
  flex-direction: column;
}

.history-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border: 1px solid var(--accent-muted);
  margin-top: -1px;
  cursor: pointer;
  transition: background 0.15s;
}

.history-item:hover {
  background: var(--accent-muted);
}

.history-item-title {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  word-break: break-word;
}

.history-item-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
}

.history-empty {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 1rem 0;
}

.code-block {
  margin: 0 0 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--accent-hover);
  overflow-x: auto;
}

.doc-content {
  margin-top: 1.5rem;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
}

.doc-content:empty {
  display: none;
}

.nav-overlay {
  display: none;
}

/* Mobile */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    flex: 1;
    align-items: center;
  }

  .user-name {
    display: none;
  }

  .wallet-btn {
    font-size: 10px;
    padding: 0.3rem 0.5rem;
  }

  .nav {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 999;
    flex-direction: column;
    align-items: stretch;
    gap: 2rem;
    min-width: 14rem;
    max-width: 30rem;
    padding-top: 2rem;
    background: var(--bg-panel);
    transform: translateX(-100%);
    transition: transform 0.2s;
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav-close {
    display: flex;
    margin: 0 1rem;
  }

  .nav-tabs {
    flex-direction: column;
    align-items: stretch;
    height: auto;
    gap: 0.25rem;
  }

  .nav-tab {
    height: auto;
    padding: 0.5rem 1rem;
  }

  .nav-tab.active::after {
    top: 0;
    bottom: 0;
    left: 0;
    right: auto;
    width: 2px;
    height: auto;
  }

  .nav-overlay.open {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 998;
    background: rgba(0, 0, 0, 0.4);
  }

  .ascii-logo {
    font-size: 2px;
  }

  .page {
    padding: 1rem;
  }

  .bottom-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .bottom-row .attach {
    align-self: flex-start;
  }
}

@media (min-width: 769px) {
  .ascii-logo {
    font-size: 4px;
  }
}

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

@keyframes blink {
  50% {
    opacity: 0;
  }
}