:root {
  --color-bg: #f5f5fb;
  --color-bg-secondary: #ededf5;
  --color-bg-card: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-border: #dddde8;
  --color-input-border: #c8c8d8;
  --color-primary: #6366f1;
  --color-danger: #d93025;
  --color-tag-bg: #ede9fe;
  --color-tag-text: #4f46e5;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-toast-success: #34a853;
  --color-toast-error: #d93025;
  --color-status-todo: #5f6368;
  --color-status-todo-bg: #e8eaed;
  --color-status-in-progress: #6366f1;
  --color-status-in-progress-bg: #ede9fe;
  --color-status-done: #34a853;
  --color-status-done-bg: #e6f4ea;
  --color-priority-low: #5f9ea0;
  --color-priority-low-bg: #e0f2f1;
  --color-priority-medium: #f9a825;
  --color-priority-medium-bg: #fff8e1;
  --color-priority-high: #d93025;
  --color-priority-high-bg: #fce8e6;
  --color-wikilink: #7b1fa2;
  --color-wikilink-bg: #f3e5f5;
  --color-overdue: #d93025;
  --color-code-bg: #f0f0f8;
  --color-code-inline-bg: #eaeaf4;
  --color-table-stripe: #f4f4fb;
  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-input-bar-bg: #eaeaf3;
  --color-input-bar-text: #1a1a1a;
  --color-input-bar-placeholder: rgba(0, 0, 0, 0.4);
  --color-overlay: rgba(0, 0, 0, 0.45);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 9999px;
  --focus-ring: 0 0 0 2px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

[data-theme="dark"] {
  --color-bg: #1a1a2e;
  --color-bg-secondary: #16213e;
  --color-bg-card: #1f2940;
  --color-text: #e0e0e0;
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #707080;
  --color-border: #2a3a5c;
  --color-input-border: #3a4a6c;
  --color-primary: #5b9cf6;
  --color-danger: #f44336;
  --color-tag-bg: #1e3a5f;
  --color-tag-text: #7bb8f6;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-toast-success: #4caf50;
  --color-toast-error: #f44336;
  --color-status-todo: #9aa0a6;
  --color-status-todo-bg: #2d333b;
  --color-status-in-progress: #5b9cf6;
  --color-status-in-progress-bg: #1e3a5f;
  --color-status-done: #4caf50;
  --color-status-done-bg: #1b3a20;
  --color-priority-low: #80cbc4;
  --color-priority-low-bg: #1a3a38;
  --color-priority-medium: #fdd835;
  --color-priority-medium-bg: #3a3520;
  --color-priority-high: #f44336;
  --color-priority-high-bg: #3a1a1a;
  --color-wikilink: #ce93d8;
  --color-wikilink-bg: #2a1a30;
  --color-overdue: #f44336;
  --color-code-bg: #161b22;
  --color-code-inline-bg: #2a3040;
  --color-table-stripe: #1a2030;
  --color-success: #4ade80;
  --color-warning: #facc15;
  --color-input-bar-bg: #1c1c1e;
  --color-input-bar-text: #ffffff;
  --color-input-bar-placeholder: rgba(255, 255, 255, 0.4);
  --color-overlay: rgba(0, 0, 0, 0.6);
}

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  transition: background-color 0.2s, color 0.2s;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible,
button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Responsive breakpoints: 480px (phone), 768px (tablet), 1024px (desktop) */
@media (max-width: 768px) {
  .hide-mobile {
    display: none !important;
  }
  button,
  [role="button"],
  .btn-new-conv,
  .btn-send {
    min-height: 44px;
  }
}
@media (min-width: 769px) {
  .hide-desktop {
    display: none !important;
  }
}

/* Floating inline assist button (teleported to body, cannot be scoped) */
.inline-assist-btn {
  position: fixed;
  z-index: 150;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--color-shadow);
  white-space: nowrap;
}
.inline-assist-btn:hover {
  filter: brightness(1.1);
}