/* Base Styles */
/* base.css - CSS variables, reset, and utilities */

/* Inter - locally hosted */
@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Regular.woff2') format('woff2'),
       url('../fonts/Inter-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: optional;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Medium.woff2') format('woff2'),
       url('../fonts/Inter-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: optional;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-SemiBold.woff2') format('woff2'),
       url('../fonts/Inter-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: optional;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Bold.woff2') format('woff2'),
       url('../fonts/Inter-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: optional;
}

@font-face {
  font-family: 'Instrument Serif';
  src: url('../fonts/InstrumentSerif-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* CSS Variables */
:root {
  --bg: #f3f3f3;
  --surface: #ffffff;
  --surface-2: #f7f9fc;
  --surface-3: #f1f5f9;
  --text: #000000;
  --text-strong: #111827;
  --muted: #5b6472;
  --text-muted: #6b7280;
  --border: #d4d4d469;
  --border-strong: #d1d5db;
  --accent: #000000;
  --accent-50: #eff6ff;
  --accent-300: #93c5fd;
  --file-item-hover: #48a9ff1f;
  --file-item-active: #48a9ff30;
  --file-item-active-text: #0b3b73;

  --main_color: #000000;
  --hover_main_color: #383838;
  --main_color_shadow: #0000003d;
  --danger: #dc2626;
  --danger-strong: #b91c1c;
  --danger-alt: #dc3545;
  --danger-alt-hover: #c82333;
  --success: #22c55e;
  --warning: #f59e0b;
  --info: #3b82f6;

  --overlay-soft: rgba(0, 0, 0, 0.1);
  --overlay: rgba(0, 0, 0, 0.2);
  --overlay-strong: rgba(0, 0, 0, 0.3);
  --overlay-panel: rgba(15, 23, 42, 0.4);

  --glass-surface-98: rgba(255, 255, 255, 0.98);
  --glass-surface-95: rgba(255, 255, 255, 0.95);
  --glass-surface-90: rgba(255, 255, 255, 0.9);
  --glass-surface-85: rgba(243, 244, 246, 0.85);
  --glass-surface-80: rgba(255, 255, 255, 0.8);
  --glass-surface-70: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);

  --state-danger-bg: rgba(239, 68, 68, 0.12);
  --state-danger-soft: rgba(239, 68, 68, 0.1);
  --state-success-soft: rgba(34, 197, 94, 0.1);
  --state-info-soft: rgba(59, 130, 246, 0.1);
  --state-warning-soft: rgba(245, 158, 11, 0.1);
  --state-hover-soft: rgba(0, 0, 0, 0.08);
  --state-hover-strong: rgba(0, 0, 0, 0.15);

  --blur-sm: 8px;
  --blur-md: 12px;
  --blur-lg: 20px;
  --user_message_color: #e9f5ff;
  /* Shared states for transparent buttons (match sidebar pill hover tone) */
  --hover_transparent_btns: var(--file-item-hover); /* light blue from sidebar actions pill */
  --active_transparent_btns: #48a9ff33; /* slightly stronger for active/selected */

  --control-height: 36px;

  --shadow: 0 var(--padding-xs) 20px rgba(15, 23, 42, .16);
  --radius-md: 12px;
  --radius-sm: 18px;
  --radius-xl: 22px;
  --radius-pill: 999px;
  --padding-xs: 4px;

  --content-max-width: 800px;

  --main_font: 15px;
  /* Default font for everything */
  --font-default: 'Inter', system-ui, -apple-system, sans-serif;
  /* Backward compatibility - same as default */
  --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
  /* Heading font - same as default */
  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
}

/* Base reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-default);
  font-size: var(--main_font);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg) !important;
  min-height: 100vh;
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading) !important;
}

/* Shared markdown content styles (chat + editor) */
.markdown-content {
  font-family: var(--font-default);
  overflow-wrap: anywhere;
}

.markdown-content > :first-child { margin-top: 0 !important; }
.markdown-content > :last-child { margin-bottom: 0 !important; }

/* Enable text selection in all markdown content elements */
.markdown-content *,
.markdown-content p,
.markdown-content span,
.markdown-content div,
.markdown-content code,
.markdown-content pre,
.markdown-content li,
.markdown-content hr,
.markdown-content em,
.markdown-content strong,
.markdown-content b,
.markdown-content i {
  user-select: text;
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  font-family: var(--font-heading) !important;
}

.markdown-content h1,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  font-weight: 600;
}

.markdown-content strong,
.markdown-content b {
  font-family: var(--font-heading) !important;
  font-weight: 700;
}

.markdown-content hr {
  margin: 0.4rem 0;
}

.markdown-content ul,
.markdown-content ol {
  padding-left: 2rem;
  margin: 0.4rem 0;
}

.markdown-content p:only-child {
  text-indent: 0;
  margin: 0;
}

.markdown-content table {
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.markdown-content th, .markdown-content td {
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  padding: .4em .6em;
  vertical-align: top;
}
.markdown-content tr:last-child th,
.markdown-content tr:last-child td {
}
.markdown-content th:last-child,
.markdown-content td:last-child {
  border-right: none;
}

.markdown-content pre {
  background: var(--surface-2);
  padding: 8px 10px;
  border-radius: 8px;
  overflow: auto;
}

.markdown-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Math formulas - KaTeX */
.markdown-content .katex {
  font-size: 1.2em;
  white-space: nowrap;
  overflow-wrap: normal;
  word-break: normal;
}

.markdown-content .katex-display {
  margin: 0.8em 0;
  text-align: center;
}

/* Utility classes */
.hidden {
  display: none !important;
}

/* App Layout */
.app-layout {
  display: grid;
  height: 100vh;
  overflow: hidden;
  /* PERFORMANCE: Use transition for smooth sidebar animation */
  transition: grid-template-columns .25s cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* Universal Container - transforms between chat and files view */
.universal-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: transparent;
  z-index: 0;
  pointer-events: auto;
}

.universal-container[data-view="chat"] {
  background: transparent;
  pointer-events: none;
}

.universal-container[data-view="chat"] .chat-view {
  pointer-events: none;
}

.universal-container[data-view="files"] {
  background: transparent;
  pointer-events: auto;
  display: flex;
  height: 100%;
  min-height: 0;
}

.universal-container[data-view="files"] .chat-view {
  display: none;
}

.universal-container[data-view="vector-search"] {
  background: transparent;
  pointer-events: auto;
  display: flex;
  height: 100%;
  min-height: 0;
}

.universal-container[data-view="vector-search"] .chat-view,
.universal-container[data-view="vector-search"] .files-view {
  display: none;
}

.universal-container[data-view="editor"] {
  background: transparent;
  pointer-events: auto;
  display: flex;
  height: 100%;
  min-height: 0;
}

.universal-container[data-view="editor"] .chat-view,
.universal-container[data-view="editor"] .files-view,
.universal-container[data-view="editor"] .vector-search-view {
  display: none;
}

/* Scrollbars */
.messages-container::-webkit-scrollbar {
  width: 10px;
}

.messages-container::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
  background: color-mix(in oklab, var(--border) 85%, black);
}

.messages-container::-webkit-scrollbar-track {
  background: transparent;
}

.messages-container::-webkit-scrollbar-track-piece:start {
  margin-top: 22px;
}

.messages-container::-webkit-scrollbar-track-piece:end {
  margin-bottom: -40px;
}

.files-view::-webkit-scrollbar {
  width: 10px;
}

.files-view::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.files-view::-webkit-scrollbar-thumb:hover {
  background: color-mix(in oklab, var(--border) 85%, black);
}

.files-view::-webkit-scrollbar-track {
  background: transparent;
}

.files-view::-webkit-scrollbar-track-piece:start {
  margin-top: 22px;
}

.files-view::-webkit-scrollbar-track-piece:end {
  margin-bottom: 45px;
}

.vector-search-scroll::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.vector-search-scroll::-webkit-scrollbar-thumb {
  background: #dbe1ea;
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
  transition: background 0.15s ease;
}

.vector-search-scroll::-webkit-scrollbar-thumb:hover {
  background: #c5cdd8;
}

.vector-search-scroll::-webkit-scrollbar-thumb:active {
  background: #a8b3c2;
}

.vector-search-scroll::-webkit-scrollbar-track {
  background: transparent;
  margin-top: 22px;
  margin-bottom: 6px;
}

/* Keep vector-search scrollbar visually identical to chat scrollbar */
.vector-search-scroll::-webkit-scrollbar {
  width: 10px;
}

.vector-search-scroll::-webkit-scrollbar-track {
  background: transparent;
  margin-top: 22px;
  margin-bottom: -36px;
}

.vector-search-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
  border: 0;
  background-clip: border-box;
  transition: none;
}

.vector-search-scroll::-webkit-scrollbar-thumb:hover {
  background: color-mix(in oklab, var(--border) 85%, black);
}

.vector-search-scroll::-webkit-scrollbar-thumb:active {
  background: var(--border);
}