/* Base Styles & CSS Variables */

:root {
  /* Colors from Figma */
  --color-white: #ffffff;
  --color-background: #f5f5f7;
  --color-border: #e8e8e8;
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #717182;
  --color-text-muted: #86868b;
  --color-accent: #007aff;
  --color-accent-light: #f5f8ff;
  --color-input-bg: #f3f3f5;
  --color-success: #34c759;
  --color-error: #ff3b30;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Layout */
  --header-height: 56px;
  --sidebar-width: 280px;
}

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

html,
body {
  height: 100%;
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  background-color: var(--color-white);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-white);
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  width: 28px;
  height: 28px;
}

.logo-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

.header-right {
  display: flex;
  align-items: center;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
}

/* Main Content */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  border-right: 1px solid var(--color-border);
  background: var(--color-white);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-header h2 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.new-chat-btn-large {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-accent);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.new-chat-btn-large:hover {
    background: #0056b3;
}

.new-chat-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.new-chat-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.upload-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.upload-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

/* Scrollable sidebar content */
.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.cabinet-list {
  padding: var(--spacing-md);
  flex-shrink: 0;
}

.loading-placeholder {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
}

.loading-placeholder .hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

.sidebar-section {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar-section h3 {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
  flex-shrink: 0;
}

.chat-history-list {
  flex: 1;
  overflow-y: auto;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}