/* ============================================================
   OpenClaw WebChat — Design System
   ============================================================ */

/* ------------------------------------------------------------------
   1. Theme tokens
   ------------------------------------------------------------------ */
:root {
  /* Colors — dark (default) */
  --color-bg: #0b0d10;
  --color-surface: #15171c;
  --color-surface-2: #1e2128;
  --color-surface-3: #272b34;
  --color-surface-elevated: #1a1d24;
  --color-border: #2f3540;
  --color-border-subtle: #22262e;

  --color-text: #f0f2f5;
  --color-text-secondary: #9aa0a6;
  --color-text-tertiary: #6b7280;
  --color-text-on-accent: #ffffff;
  --color-text-on-dark: #ffffff;

  --color-accent: #4f8cff;
  --color-accent-hover: #3a78f0;
  --color-accent-soft: rgba(79, 140, 255, 0.12);

  --color-success: #22c55e;
  --color-success-soft: rgba(34, 197, 94, 0.12);
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-danger-soft: rgba(239, 68, 68, 0.12);
  --color-warning: #f59e0b;
  --color-warning-soft: rgba(245, 158, 11, 0.12);
  --color-info: #3b82f6;
  --color-info-soft: rgba(59, 130, 246, 0.12);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --text-xs: 12px;
  --text-sm: 13px;
  --text-base: 14px;
  --text-md: 15px;
  --text-lg: 17px;
  --text-xl: 20px;
  --text-2xl: 26px;

  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.4;
  --leading-normal: 1.55;
  --leading-relaxed: 1.65;

  /* Spacing (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Radii */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.55);
  --shadow-focus: 0 0 0 3px var(--color-accent-soft);

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 180ms ease;
  --transition-slow: 260ms ease;

  /* Layout */
  --header-height: 60px;
  --input-height: 48px;
  --max-content-width: 1100px;
}

[data-theme="light"] {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-surface-2: #f1f3f5;
  --color-surface-3: #e5e7eb;
  --color-surface-elevated: #ffffff;
  --color-border: #d1d5db;
  --color-border-subtle: #e5e7eb;

  --color-text: #111827;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #9ca3af;
  --color-text-on-accent: #ffffff;
  --color-text-on-dark: #ffffff;

  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-soft: rgba(37, 99, 235, 0.12);

  --color-success: #16a34a;
  --color-success-soft: rgba(22, 163, 74, 0.12);
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-danger-soft: rgba(220, 38, 38, 0.12);
  --color-warning: #d97706;
  --color-warning-soft: rgba(217, 119, 6, 0.12);
  --color-info: #2563eb;
  --color-info-soft: rgba(37, 99, 235, 0.12);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-focus: 0 0 0 3px var(--color-accent-soft);
}

/* ------------------------------------------------------------------
   2. Reset & base
   ------------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
}

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

html {
  color-scheme: dark;
}

[data-theme="light"] html {
  color-scheme: light;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font: var(--text-md)/var(--leading-normal) var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, textarea, select {
  font: inherit;
}

/* ------------------------------------------------------------------
   3. Typography utilities
   ------------------------------------------------------------------ */
.text-xs { font-size: var(--text-xs); line-height: var(--leading-snug); }
.text-sm { font-size: var(--text-sm); line-height: var(--leading-snug); }
.text-base { font-size: var(--text-base); line-height: var(--leading-normal); }
.text-md { font-size: var(--text-md); line-height: var(--leading-normal); }
.text-lg { font-size: var(--text-lg); line-height: var(--leading-snug); }
.text-xl { font-size: var(--text-xl); line-height: var(--leading-tight); }
.text-2xl { font-size: var(--text-2xl); line-height: var(--leading-tight); }

.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* ------------------------------------------------------------------
   4. Components
   ------------------------------------------------------------------ */

/* Buttons */
button, .btn {
  appearance: none;
  border: 1px solid transparent;
  background: var(--color-surface-2);
  color: var(--color-text);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: var(--leading-none);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

button:hover:not(:disabled), .btn:hover:not(:disabled) {
  background: var(--color-surface-3);
}

button:active:not(:disabled), .btn:active:not(:disabled) {
  transform: translateY(1px);
}

button:focus-visible, .btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

button:disabled, .btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  border-color: var(--color-accent);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border-color: transparent;
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger);
  color: var(--color-text-on-dark);
}

.btn-success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
  background: var(--color-success);
  color: var(--color-text-on-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius);
}

.btn-icon.btn-lg {
  width: var(--input-height);
  height: var(--input-height);
}

/* Inputs */
input, textarea, select {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 11px 14px;
  border-radius: var(--radius);
  font-size: var(--text-base);
  width: 100%;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-tertiary);
}

input:hover, textarea:hover, select:hover {
  border-color: var(--color-text-tertiary);
}

input:focus, textarea:focus, select:focus {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

input:disabled, textarea:disabled, select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

textarea {
  resize: none;
  min-height: var(--input-height);
  max-height: 160px;
  field-sizing: content;
}

/* Form group */
.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group label.required::after {
  content: ' *';
  color: var(--color-danger);
}

.form-error {
  color: var(--color-danger);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

.form-success {
  color: var(--color-success);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

/* Card */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  line-height: var(--leading-none);
}

.badge.admin {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.badge.user {
  background: var(--color-surface-3);
  color: var(--color-text-secondary);
}

.badge.active {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.badge.blocked {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

/* Avatar */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
  user-select: none;
}

.avatar-sm { width: 28px; height: 28px; font-size: var(--text-xs); }
.avatar-lg { width: 44px; height: 44px; font-size: var(--text-base); }

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--space-10) var(--space-5);
}

.empty-state svg {
  color: var(--color-text-tertiary);
}

.empty-state-hint {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  max-width: 320px;
}

.history-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.message-highlight {
  animation: highlight-pulse 2s ease;
}

@keyframes highlight-pulse {
  0% { background-color: var(--color-accent-soft); }
  100% { background-color: transparent; }
}

/* Toast */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 360px;
  width: calc(100% - var(--space-8));
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  animation: toast-in var(--transition-base) ease;
}

.toast.toast-out {
  animation: toast-out var(--transition-base) ease forwards;
}

.toast-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.toast-content {
  flex: 1;
  font-size: var(--text-sm);
}

.toast-close {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  color: var(--color-text-tertiary);
}

.toast-close:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Dropdown */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 180px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  text-align: left;
  cursor: pointer;
  border-radius: 0;
}

.dropdown-item:hover {
  background: var(--color-surface-2);
}

.dropdown-item:first-child {
  border-radius: var(--radius) var(--radius) 0 0;
}

.dropdown-item:last-child {
  border-radius: 0 0 var(--radius) var(--radius);
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-1) var(--space-3);
}

/* ------------------------------------------------------------------
   5. Utility classes
   ------------------------------------------------------------------ */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.icon-spin {
  animation: spin 1s linear infinite;
}

/* ------------------------------------------------------------------
   6. Login page
   ------------------------------------------------------------------ */
.login-page {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  background:
    radial-gradient(circle at 10% 20%, var(--color-accent-soft) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, var(--color-success-soft) 0%, transparent 40%),
    var(--color-bg);
}

.login-box {
  width: min(420px, 100%);
  padding: var(--space-8);
  text-align: center;
}

.login-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-lg);
}

.login-box h1 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-2xl);
  font-weight: 700;
}

.login-box .subtitle {
  margin: 0 0 var(--space-6);
  color: var(--color-text-secondary);
}

.input-with-button {
  position: relative;
}

.input-with-button input {
  padding-right: 44px;
}

.input-with-button button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  color: var(--color-text-tertiary);
}

.input-with-button button:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* ------------------------------------------------------------------
   7. Chat page
   ------------------------------------------------------------------ */
.chat-layout {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}

/* Header */
.chat-header {
  flex-shrink: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.chat-header .brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.chat-header .brand svg {
  color: var(--color-accent);
}

.chat-header .user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.chat-header .chat-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  margin-right: var(--space-3);
}

.chat-header .user-name {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
  width: 8px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

.message-row {
  display: flex;
  gap: var(--space-3);
  max-width: min(820px, 92%);
  animation: message-in var(--transition-base) ease;
}

.message-row.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-row.assistant {
  align-self: flex-start;
}

.message-row .avatar {
  flex-shrink: 0;
  margin-top: 2px;
}

.message-bubble {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  line-height: var(--leading-relaxed);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.message-row.user .message-bubble {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  border-bottom-right-radius: var(--space-1);
}

.message-row.assistant .message-bubble {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: var(--space-1);
}

.message-row.user .message-text a {
  color: inherit;
  text-decoration: underline;
}

.message-text p:first-child,
.message-text p:last-child {
  margin: 0;
}

.message-text img.chat-image {
  max-width: 100%;
  max-height: 260px;
  border-radius: var(--radius);
  margin-top: var(--space-2);
  display: block;
  border: 1px solid var(--color-border);
}

.message-images {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.message-image-wrapper {
  position: relative;
  display: inline-block;
  border-radius: var(--radius);
  overflow: hidden;
}

.message-images a {
  display: block;
}

.message-image-wrapper .btn-edit-image {
  position: absolute;
  bottom: var(--space-2);
  right: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: var(--text-xs);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.message-image-wrapper:hover .btn-edit-image,
.message-image-wrapper:focus-within .btn-edit-image {
  opacity: 1;
}

.message-image-wrapper .btn-edit-image:hover {
  background: rgba(0, 0, 0, 0.85);
}

.edit-image-thumb {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.message-meta {
  font-size: var(--text-xs);
  opacity: 0.7;
  margin-top: var(--space-1);
  text-align: right;
}

.message-row.assistant .message-meta {
  text-align: left;
}

/* Attachments inside message */
.attachments {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.attachment-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  max-width: 320px;
}

.message-row.user .attachment-card {
  background: rgba(255, 255, 255, 0.15);
}

.attachment-card svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.attachment-info {
  flex: 1;
  min-width: 0;
}

.attachment-name {
  font-weight: 500;
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.attachment-size {
  font-size: var(--text-xs);
  opacity: 0.7;
}

.attachment-card a {
  color: inherit;
  text-decoration: none;
}

.attachment-card a:hover {
  text-decoration: underline;
}

.ocr-note {
  font-size: var(--text-xs);
  opacity: 0.75;
  margin-top: var(--space-1);
}

.attachment-image-caption {
  font-size: var(--text-xs);
  opacity: 0.75;
  margin-top: var(--space-1);
  text-align: center;
  word-break: break-word;
}

.report-link {
  margin-top: var(--space-2);
}

.report-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
}

.report-button:hover {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  text-decoration: none;
}

/* Typing indicator */
.typing {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-5) var(--space-3);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.typing-dots {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 36px;
  height: 22px;
  padding: 0 10px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

.typing-dots span {
  width: 5px;
  height: 5px;
  background: var(--color-text-tertiary);
  border-radius: var(--radius-full);
  animation: typing-bounce 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }

/* Input area */
.chat-input {
  flex-shrink: 0;
  position: relative;
  padding: var(--space-4) var(--space-5) var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.chat-input form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: var(--max-content-width);
  margin: 0 auto;
}

.input-row {
  display: flex;
  gap: var(--space-3);
  align-items: flex-end;
}

.input-row .btn-icon {
  flex-shrink: 0;
  color: var(--color-text-secondary);
  background: var(--color-surface-2);
}

.input-row .btn-icon:hover:not(:disabled) {
  color: var(--color-text);
  background: var(--color-surface-3);
}

.input-row .btn-icon:disabled {
  opacity: 0.4;
}

.chat-input textarea {
  flex: 1;
  min-height: var(--input-height);
  max-height: 160px;
  padding: 13px 16px;
  border-radius: var(--radius-lg);
  font-size: var(--text-md);
  background: var(--color-surface-2);
}

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

.chat-input .send-btn {
  flex-shrink: 0;
  width: var(--input-height);
  height: var(--input-height);
  padding: 0;
  border-radius: var(--radius-lg);
}

.chat-input .send-btn .btn-text {
  display: none;
}

/* Attachment preview */
.attachment-preview {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
}

.attachment-chip .remove-attachment {
  width: 22px;
  height: 22px;
  padding: 0;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-tertiary);
}

.attachment-chip .remove-attachment:hover {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

/* Drop zone */
.drop-zone {
  position: fixed;
  inset: 0;
  background: rgba(11, 13, 16, 0.85);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  z-index: 50;
  border: 3px dashed var(--color-accent);
}

[data-theme="light"] .drop-zone {
  background: rgba(248, 249, 251, 0.85);
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-accent);
}

.drop-zone-content svg {
  width: 64px;
  height: 64px;
}

.drop-zone-content span {
  font-size: var(--text-xl);
  font-weight: 600;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--space-4);
}

.modal {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  margin: 0;
  font-size: var(--text-lg);
}

.modal-body {
  padding: var(--space-4);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.modal-body input {
  width: 100%;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-base);
}

.search-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.search-loading,
.search-empty,
.search-error {
  padding: var(--space-4);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.search-result-item {
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--color-surface-2);
  cursor: pointer;
  transition: background 0.15s ease;
}

.search-result-item:hover {
  background: var(--color-surface-3);
}

.search-result-meta {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-1);
}

.search-result-context {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  opacity: 0.7;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-result-match {
  font-size: var(--text-sm);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-result-match mark {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 0 2px;
}

/* Commands panel */
.commands-panel {
  position: absolute;
  bottom: calc(100% + var(--space-3));
  left: var(--space-5);
  right: var(--space-5);
  max-width: var(--max-content-width);
  margin: 0 auto;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-height: 320px;
  display: flex;
  flex-direction: column;
  z-index: 40;
  overflow: hidden;
}

.commands-header {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  align-items: center;
}

.commands-header input {
  flex: 1;
  background: transparent;
  border: none;
  padding: var(--space-2) var(--space-3);
}

.commands-header input:focus {
  box-shadow: none;
  background: var(--color-surface-2);
}

.commands-close {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-text-secondary);
}

.commands-close:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.commands-list {
  overflow-y: auto;
  padding: var(--space-2);
}

.command-item {
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.command-item:hover,
.command-item.active {
  background: var(--color-surface-2);
}

.command-item:focus-visible {
  outline: none;
  background: var(--color-surface-2);
  box-shadow: inset 0 0 0 2px var(--color-accent);
}

.command-name {
  font-weight: 600;
  color: var(--color-accent);
  font-size: var(--text-sm);
}

.command-desc {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
  line-height: var(--leading-snug);
}

.commands-empty {
  padding: var(--space-5);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

/* ------------------------------------------------------------------
   8. Admin page
   ------------------------------------------------------------------ */
.admin-layout {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}

.admin-header {
  flex-shrink: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.admin-header .brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.admin-header .brand a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
}

.admin-header .brand a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.admin-main {
  flex: 1;
  padding: var(--space-5);
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
}

.toolbar {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.toolbar .form-group {
  margin: 0;
  flex: 1;
  min-width: 160px;
}

.toolbar .form-group label {
  margin-bottom: var(--space-1);
}

.toolbar input, .toolbar select {
  width: 100%;
  min-width: 0;
}

.toolbar-actions {
  display: flex;
  gap: var(--space-2);
  margin-left: auto;
}

/* Admin table */
.admin-table-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.admin-table th, .admin-table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
}

.admin-table th {
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-surface-2);
}

.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.admin-table tbody tr:hover {
  background: var(--color-surface-2);
}

.user-cell {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.user-cell .name {
  font-weight: 500;
}

.user-cell .login {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.actions .btn {
  padding: 8px 12px;
  font-size: var(--text-xs);
}

/* Mobile cards */
.user-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.user-card {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.user-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.user-card-body {
  display: grid;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.user-card-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
}

.user-card-row span:first-child {
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  font-weight: 600;
}

.user-card-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ------------------------------------------------------------------
   9. Modal
   ------------------------------------------------------------------ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
  display: grid;
  place-items: center;
  padding: var(--space-5);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-overlay:not(.hidden) {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: min(560px, 100%);
  max-height: calc(100vh - var(--space-10));
  overflow-y: auto;
  padding: var(--space-6);
  transform: scale(0.96) translateY(8px);
  transition: transform var(--transition-base);
}

.modal-overlay:not(.hidden) .modal {
  transform: scale(1) translateY(0);
}

.modal h2 {
  margin: 0 0 var(--space-5);
  font-size: var(--text-xl);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

/* ------------------------------------------------------------------
   10. Animations
   ------------------------------------------------------------------ */
@keyframes message-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes typing-bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ------------------------------------------------------------------
   11. Responsive
   ------------------------------------------------------------------ */
@media (max-width: 1023px) {
  .admin-main {
    padding: var(--space-4);
  }

  .toolbar {
    padding: var(--space-3);
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 56px;
  }

  .chat-header, .admin-header {
    padding: 0 var(--space-4);
  }

  .chat-header .brand span,
  .admin-header .brand span {
    display: none;
  }

  .chat-messages {
    padding: var(--space-4);
    gap: var(--space-4);
  }

  .message-row {
    max-width: 96%;
    gap: var(--space-2);
  }

  .message-bubble {
    padding: var(--space-3);
  }

  .chat-input {
    padding: var(--space-3) var(--space-4) var(--space-4);
  }

  .input-row {
    gap: var(--space-2);
  }

  .chat-input textarea {
    font-size: var(--text-base);
  }

  .commands-panel {
    left: var(--space-4);
    right: var(--space-4);
  }

  .admin-main {
    padding: var(--space-3);
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .toolbar .form-group {
    min-width: 0;
  }

  .toolbar-actions {
    margin-left: 0;
  }

  .toolbar-actions .btn {
    flex: 1;
  }

  .admin-table-wrap {
    display: none;
  }

  .user-cards {
    display: flex;
  }

  .modal {
    width: 100%;
    max-height: calc(100dvh - var(--space-6));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    align-self: end;
  }

  .modal-overlay:not(.hidden) .modal {
    transform: translateY(0);
  }

  .modal-overlay .modal {
    transform: translateY(100%);
  }
}

@media (min-width: 768px) {
  .admin-table-wrap {
    display: block;
  }

  .user-cards {
    display: none;
  }
}

@media (max-width: 479px) {
  .login-page {
    padding: 0;
  }

  .login-box {
    border-radius: 0;
    border: none;
    box-shadow: none;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .chat-header .user-name {
    display: none;
  }

  .chat-input .btn-icon {
    width: 40px;
    height: 40px;
  }
}

/* ------------------------------------------------------------------
   12. Accessibility
   ------------------------------------------------------------------ */
:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
textarea:focus:not(:focus-visible),
select:focus:not(:focus-visible) {
  box-shadow: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Legacy helpers to preserve existing markup */
.attachment-preview.hidden,
#edit-image-preview.hidden,
.commands-panel.hidden,
.drop-zone.hidden,
.modal-overlay.hidden,
#typing.hidden {
  display: none !important;
}