:root {
  color-scheme: light dark;
  --bg: #f6f7f8;
  --bg-top: #f8f9fb;
  --bg-glow: rgba(255, 255, 255, 0.8);
  --panel: rgba(255, 255, 255, 0.92);
  --panel-border: rgba(15, 23, 42, 0.08);
  --text: #111827;
  --muted: #6b7280;
  --header-border: rgba(15, 23, 42, 0.06);
  --assistant-bubble: #ffffff;
  --assistant-border: rgba(15, 23, 42, 0.06);
  --assistant-shadow: 0 6px 20px rgba(15, 23, 42, 0.04);
  --user-bubble: rgba(17, 24, 39, 0.06);
  --user-border: rgba(15, 23, 42, 0.05);
  --code-bg: #f3f4f6;
  --code-border: rgba(15, 23, 42, 0.06);
  --inline-code-bg: rgba(15, 23, 42, 0.06);
  --composer-shell-bg: rgba(255, 255, 255, 0.72);
  --composer-panel-bg: #ffffff;
  --composer-panel-border: rgba(15, 23, 42, 0.08);
  --accent: #111827;
  --accent-contrast: #ffffff;
  --accent-soft: rgba(17, 24, 39, 0.08);
  --success: #1f9d55;
  --empty-dot: #cbd5e1;
  --title-link: rgba(17, 24, 39, 0.72);
  --title-link-hover: #111827;
  --link-accent: #3478f6;
  --ghost-border: rgba(15, 23, 42, 0.08);
  --ghost-bg: rgba(17, 24, 39, 0.03);
  --modal-backdrop: rgba(15, 23, 42, 0.2);
  --modal-panel: rgba(255, 255, 255, 0.98);
  --modal-panel-border: rgba(15, 23, 42, 0.06);
  --modal-shadow:
    0 24px 60px rgba(37, 99, 235, 0.08),
    0 18px 40px rgba(15, 23, 42, 0.08);
  --unlock-modal-shadow:
    0 28px 60px rgba(15, 23, 42, 0.16),
    0 10px 24px rgba(15, 23, 42, 0.08);
  --modal-error-bg: rgba(239, 68, 68, 0.08);
  --modal-error-border: rgba(239, 68, 68, 0.14);
  --modal-error-text: #b42318;
  --unlock-close: rgba(17, 24, 39, 0.88);
  --unlock-button-bg: #ffffff;
  --unlock-button-border: rgba(15, 23, 42, 0.08);
  --unlock-button-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 1px 2px rgba(15, 23, 42, 0.04);
  --unlock-button-icon: rgba(17, 24, 39, 0.78);
  --input-border: rgba(15, 23, 42, 0.1);
  --input-bg: rgba(17, 24, 39, 0.025);
  --input-focus-border: rgba(15, 23, 42, 0.24);
  --input-focus-bg: #ffffff;
  --unlock-input-bg: #f8fafc;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "SF Pro Text", Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at top, var(--bg-glow), transparent 35%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.5;
  font-weight: 400;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

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

body {
  min-width: 320px;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  padding: 24px;
}

.chat-card {
  width: min(920px, 100%);
  height: calc(100vh - 48px);
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --bg-top: #111827;
    --bg-glow: rgba(52, 120, 246, 0.12);
    --panel: rgba(15, 23, 42, 0.86);
    --panel-border: rgba(148, 163, 184, 0.14);
    --text: #e5e7eb;
    --muted: #94a3b8;
    --header-border: rgba(148, 163, 184, 0.14);
    --assistant-bubble: rgba(15, 23, 42, 0.88);
    --assistant-border: rgba(148, 163, 184, 0.14);
    --assistant-shadow: 0 8px 24px rgba(2, 6, 23, 0.22);
    --user-bubble: rgba(52, 120, 246, 0.14);
    --user-border: rgba(96, 165, 250, 0.14);
    --code-bg: rgba(2, 6, 23, 0.9);
    --code-border: rgba(148, 163, 184, 0.16);
    --inline-code-bg: rgba(148, 163, 184, 0.16);
    --composer-shell-bg: rgba(15, 23, 42, 0.74);
    --composer-panel-bg: rgba(15, 23, 42, 0.92);
    --composer-panel-border: rgba(148, 163, 184, 0.16);
    --accent: #f3f4f6;
    --accent-contrast: #111827;
    --empty-dot: #475569;
    --title-link: rgba(226, 232, 240, 0.72);
    --title-link-hover: #f8fafc;
    --ghost-border: rgba(148, 163, 184, 0.16);
    --ghost-bg: rgba(148, 163, 184, 0.08);
    --modal-backdrop: rgba(2, 6, 23, 0.45);
    --modal-panel: rgba(15, 23, 42, 0.96);
    --modal-panel-border: rgba(148, 163, 184, 0.14);
    --modal-shadow:
      0 24px 60px rgba(2, 6, 23, 0.42),
      0 18px 40px rgba(2, 6, 23, 0.22);
    --unlock-modal-shadow:
      0 28px 60px rgba(2, 6, 23, 0.48),
      0 10px 24px rgba(2, 6, 23, 0.24);
    --modal-error-bg: rgba(239, 68, 68, 0.12);
    --modal-error-border: rgba(248, 113, 113, 0.24);
    --modal-error-text: #fecaca;
    --unlock-close: rgba(226, 232, 240, 0.88);
    --unlock-button-bg: rgba(15, 23, 42, 0.9);
    --unlock-button-border: rgba(148, 163, 184, 0.16);
    --unlock-button-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.04),
      0 1px 2px rgba(2, 6, 23, 0.28);
    --unlock-button-icon: rgba(226, 232, 240, 0.82);
    --input-border: rgba(148, 163, 184, 0.16);
    --input-bg: rgba(2, 6, 23, 0.46);
    --input-focus-border: rgba(96, 165, 250, 0.38);
    --input-focus-bg: rgba(15, 23, 42, 0.96);
    --unlock-input-bg: rgba(2, 6, 23, 0.56);
    --shadow: 0 24px 60px rgba(2, 6, 23, 0.26);
  }
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px 16px;
  border-bottom: 1px solid var(--header-border);
}

.chat-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.chat-title-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.chat-title-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  color: var(--title-link);
  transition: color 160ms ease, transform 160ms ease;
}

.chat-title-link svg {
  width: 16px;
  height: 16px;
}

.chat-title-link:hover {
  color: var(--title-link-hover);
  transform: translateY(-1px);
}

.chat-subtitle {
  margin-top: 2px;
  color: var(--muted);
  font-size: 13px;
}

.chat-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.chat-header-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--empty-dot);
}

.status-dot[data-state="locked"] {
  background: #f59e0b;
}

.status-dot[data-state="unlocked"] {
  background: var(--success);
}

.chat-thread {
  overflow-y: auto;
  padding: 14px 22px 24px;
}

.bubble-row {
  display: flex;
  margin-bottom: 12px;
}

.bubble-row-assistant {
  justify-content: flex-start;
}

.bubble-row-user {
  justify-content: flex-end;
}

.bubble {
  width: fit-content;
  max-width: min(720px, 100%);
  padding: 12px 14px;
  border-radius: 20px;
  font-size: 15px;
  letter-spacing: -0.01em;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble p {
  margin: 0;
}

.bubble p + p {
  margin-top: 10px;
}

.bubble-assistant {
  background: var(--assistant-bubble);
  border: 1px solid var(--assistant-border);
  box-shadow: var(--assistant-shadow);
}

.bubble-user {
  background: var(--user-bubble);
  border: 1px solid var(--user-border);
}

.message-code {
  margin: 10px 0 0;
  padding: 12px 14px;
  border-radius: 14px;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  font-size: 12px;
  line-height: 1.55;
}

.message-code code {
  font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, monospace;
}

.secret-inline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.secret-inline code {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--inline-code-bg);
  font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, monospace;
  font-size: 12px;
}

.composer-shell {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--header-border);
  background: var(--composer-shell-bg);
}

.composer {
  display: grid;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--composer-panel-border);
  background: var(--composer-panel-bg);
  border-radius: 22px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.composer textarea {
  width: 100%;
  min-height: 24px;
  max-height: 180px;
  resize: none;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 4px 6px;
  outline: none;
}

.composer textarea::placeholder,
.composer-hint {
  color: var(--muted);
}

.composer-actions {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
  gap: 12px;
}

.composer-footer {
  margin-top: 10px;
  padding: 0 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.composer-hint {
  font-size: 12px;
  min-width: 0;
}

.composer-credit {
  flex-shrink: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.2;
  text-align: right;
  white-space: nowrap;
}

.composer-credit a {
  color: var(--link-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.send-button,
.ghost-button {
  height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: none;
  transition: opacity 160ms ease, transform 160ms ease, background-color 160ms ease;
}

.send-button {
  background: var(--accent);
  color: var(--accent-contrast);
}

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

.ghost-button-header {
  border: 1px solid var(--ghost-border);
  background: var(--ghost-bg);
}

.send-button:hover:not(:disabled),
.ghost-button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.send-button:disabled,
.ghost-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--modal-backdrop);
}

.modal-backdrop[hidden] {
  display: none;
}

.setup-modal {
  width: min(460px, 100%);
  padding: 28px 32px 30px;
  background: var(--modal-panel);
  border: 1px solid var(--modal-panel-border);
  border-radius: 32px;
  box-shadow: var(--modal-shadow);
}

.unlock-modal {
  width: min(420px, 100%);
  position: relative;
  padding: 24px 28px 26px;
  border-radius: 28px;
  box-shadow: var(--unlock-modal-shadow);
}

.setup-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.setup-kicker {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
}

.modal-dismiss {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 0;
  font-size: 16px;
}

.modal-dismiss:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.setup-modal h1 {
  margin: 10px 0 12px;
  font-size: 30px;
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.setup-copy {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.45;
}

.setup-form {
  display: grid;
  gap: 14px;
}

.modal-error {
  margin: -8px 0 2px;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--modal-error-bg);
  border: 1px solid var(--modal-error-border);
  color: var(--modal-error-text);
  font-size: 13px;
  line-height: 1.4;
}

.modal-error-centered {
  width: 100%;
  max-width: 320px;
  margin: -2px auto 0;
  text-align: left;
}

.unlock-choice {
  display: grid;
  width: 100%;
  gap: 16px;
}

.unlock-screen {
  display: grid;
  justify-items: center;
  gap: 18px;
  text-align: center;
}

.unlock-screen[hidden] {
  display: none;
}

.unlock-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--unlock-close);
}

.unlock-close svg {
  width: 18px;
  height: 18px;
}

.unlock-hero-icon {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  color: var(--link-accent);
}

.unlock-hero-icon svg {
  width: 56px;
  height: 56px;
}

.unlock-copy-stack {
  display: grid;
  justify-items: center;
  gap: 10px;
}

.unlock-kicker {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.unlock-copy-stack h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.unlock-copy {
  max-width: 320px;
  margin: 0;
  text-align: center;
}

.unlock-primary {
  height: 58px;
  width: 100%;
  border: 1px solid var(--unlock-button-border);
  border-radius: 16px;
  background: var(--unlock-button-bg);
  color: var(--text);
  font-weight: 700;
  font-size: 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: var(--unlock-button-shadow);
}

.unlock-button-icon {
  width: 18px;
  height: 18px;
  color: var(--unlock-button-icon);
}

.unlock-button-icon svg {
  width: 18px;
  height: 18px;
}

.unlock-link {
  align-self: center;
  border: none;
  background: transparent;
  color: var(--link-accent);
  font-weight: 700;
  font-size: 15px;
  padding: 0;
}

.unlock-primary:disabled,
.unlock-link:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.unlock-primary:hover:not(:disabled),
.unlock-link:hover:not(:disabled),
.unlock-close:hover:not(:disabled) {
  opacity: 0.8;
}

.input-group {
  display: grid;
  gap: 7px;
}

.input-group span {
  font-size: 14px;
  color: var(--muted);
}

.input-group input {
  height: 62px;
  padding: 0 18px;
  border: 1px solid var(--input-border);
  border-radius: 18px;
  background: var(--input-bg);
  color: var(--text);
  font-size: 16px;
}

.input-group input:focus {
  outline: none;
  border-color: var(--input-focus-border);
  background: var(--input-focus-bg);
}

.setup-actions {
  padding-top: 10px;
}

.setup-actions .send-button {
  width: 100%;
  height: 58px;
  font-size: 17px;
  font-weight: 700;
}

.unlock-modal .send-button {
  border-radius: 16px;
  background: var(--link-accent);
  color: #ffffff;
}

.unlock-passphrase-form {
  width: 100%;
  gap: 16px;
}

.unlock-input-group {
  width: 100%;
  text-align: left;
}

.unlock-input-group input {
  border-radius: 16px;
  background: var(--unlock-input-bg);
}

.unlock-actions {
  width: 100%;
  padding-top: 0;
}

@media (max-width: 720px) {
  .app-shell {
    padding: 0;
  }

  .chat-card {
    width: 100%;
    height: 100vh;
    border-radius: 0;
    border-left: none;
    border-right: none;
    box-shadow: none;
  }

  .chat-header,
  .chat-thread {
    padding-left: 16px;
    padding-right: 16px;
  }

  .composer-shell {
    padding: 12px;
  }

  .chat-meta {
    display: none;
  }

  .chat-header-actions {
    gap: 0;
  }

  .setup-modal {
    padding: 22px;
    border-radius: 24px;
  }

  .unlock-modal {
    padding: 22px 20px 22px;
  }
}