/* ============================================================
   Aseman AI — Chat CSS
   Token-based, RTL, light + dark, 4px rhythm
   ============================================================ */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  /* Neutral ramp (OKLCH-inspired, HSL approximations) */
  --n-50 : hsl(220 14% 97%);
  --n-100: hsl(220 13% 93%);
  --n-200: hsl(220 11% 87%);
  --n-300: hsl(220 10% 76%);
  --n-400: hsl(220  9% 62%);
  --n-500: hsl(220  8% 48%);
  --n-600: hsl(220  9% 36%);
  --n-700: hsl(220 10% 26%);
  --n-800: hsl(220 12% 18%);
  --n-900: hsl(220 15% 12%);
  --n-950: hsl(220 18%  8%);

  /* Accent — violet */
  --a-300: hsl(262 72% 72%);
  --a-400: hsl(262 68% 62%);
  --a-500: hsl(262 64% 52%);   /* primary accent */
  --a-600: hsl(262 60% 44%);

  /* Semantic roles — light */
  --bg-base   : var(--n-50);
  --bg-raised : #ffffff;
  --bg-sidebar: hsl(220 16% 14%);
  --bg-sidebar-item-hover: hsl(220 12% 20%);
  --border    : var(--n-200);
  --border-focus: var(--a-400);
  --text-body : var(--n-900);
  --text-muted: var(--n-500);
  --text-on-sidebar: var(--n-100);

  /* Composer */
  --composer-bg    : #ffffff;
  --composer-border: var(--n-200);
  --send-idle      : hsl(240 6% 55%);    /* #8b8b96 equivalent */
  --send-hover     : var(--a-500);
  --attach-bg      : var(--n-100);
  --attach-hover   : var(--n-200);
  --pill-bg        : var(--n-100);
  --pill-active-bg : var(--a-500);
  --pill-active-fg : #ffffff;

  /* Bubbles */
  --bubble-user-bg: var(--a-500);
  --bubble-user-fg: #ffffff;
  --bubble-ai-bg  : var(--bg-raised);
  --bubble-ai-fg  : var(--text-body);

  /* Misc */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-sm : 0 1px 3px hsl(220 10% 20% / 8%), 0 1px 2px hsl(220 10% 20% / 5%);
  --shadow-md : 0 4px 12px hsl(220 10% 20% / 10%);
  --transition: 160ms ease;
  --font-body : -apple-system, 'Vazirmatn', 'IRANSans', 'Segoe UI', sans-serif;
}

/* Dark mode */
[data-theme="dark"],
.aseman-chat-wrap[data-theme="dark"] {
  --bg-base   : var(--n-950);
  --bg-raised : var(--n-900);
  --border    : hsl(220 12% 22%);
  --text-body : var(--n-100);
  --text-muted: var(--n-400);
  --composer-bg    : var(--n-900);
  --composer-border: hsl(220 12% 24%);
  --attach-bg  : hsl(220 12% 22%);
  --attach-hover: hsl(220 12% 28%);
  --pill-bg    : hsl(220 12% 20%);
  --bubble-ai-bg: hsl(220 12% 16%);
  --send-idle  : hsl(240 6% 45%);
}

/* ── Reset / Base ────────────────────────────────────────── */
.aseman-chat-wrap *,
.aseman-chat-wrap *::before,
.aseman-chat-wrap *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.aseman-chat-wrap {
  display: flex;
  height: 100vh;
  min-height: 480px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-body);
  background: var(--bg-base);
  direction: rtl;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.aseman-sidebar {
  display: flex;
  flex-direction: column;
  width: 260px;
  min-width: 260px;
  background: var(--bg-sidebar);
  color: var(--text-on-sidebar);
  overflow: hidden;
  transition: width var(--transition), min-width var(--transition);
}

.aseman-sidebar.collapsed {
  width: 0;
  min-width: 0;
}

.aseman-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 12px;
  border-bottom: 1px solid hsl(220 12% 22%);
}

.aseman-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
}

.aseman-logo img {
  border-radius: 8px;
}

.aseman-sidebar-toggle,
.aseman-sidebar-open-btn,
.aseman-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.aseman-sidebar-toggle:hover { background: var(--bg-sidebar-item-hover); }
.aseman-icon-btn:hover { background: var(--n-200); }
[data-theme="dark"] .aseman-icon-btn:hover { background: var(--n-800); }

.aseman-sidebar-toggle:focus-visible,
.aseman-icon-btn:focus-visible {
  outline: 2px solid var(--a-400);
  outline-offset: 2px;
}

/* New chat */
.aseman-new-chat-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 12px 8px;
  padding: 10px 14px;
  border: 1px solid hsl(220 12% 26%);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-on-sidebar);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  text-align: right;
}

.aseman-new-chat-btn:hover {
  background: var(--bg-sidebar-item-hover);
  border-color: hsl(220 12% 32%);
}

.aseman-new-chat-btn:focus-visible {
  outline: 2px solid var(--a-400);
  outline-offset: 2px;
}

/* History nav */
.aseman-history-nav {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
  scrollbar-width: thin;
  scrollbar-color: hsl(220 12% 28%) transparent;
}

.aseman-history-nav::-webkit-scrollbar { width: 4px; }
.aseman-history-nav::-webkit-scrollbar-track { background: transparent; }
.aseman-history-nav::-webkit-scrollbar-thumb {
  background: hsl(220 12% 28%);
  border-radius: 2px;
}

.aseman-history-item {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--n-300);
  font-family: inherit;
  font-size: 13.5px;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.aseman-history-item:hover,
.aseman-history-item.active {
  background: var(--bg-sidebar-item-hover);
  color: var(--n-100);
}

.aseman-history-item:focus-visible {
  outline: 2px solid var(--a-400);
  outline-offset: 1px;
}

/* Sidebar footer */
.aseman-sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid hsl(220 12% 22%);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.aseman-user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.aseman-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.aseman-user-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
}

.aseman-user-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--n-100);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aseman-user-plan {
  font-size: 11.5px;
  color: var(--n-400);
}

.aseman-wallet-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: hsl(220 12% 18%);
  font-size: 13px;
  color: var(--n-200);
}

.aseman-wallet-badge svg { color: var(--a-300); flex-shrink: 0; }
.aseman-wallet-badge small { font-size: 11px; color: var(--n-400); }

/* ── Main ────────────────────────────────────────────────── */
.aseman-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-base);
}

/* Top bar */
.aseman-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-base);
  min-height: 56px;
}

.aseman-sidebar-open-btn { color: var(--text-muted); }
.aseman-sidebar-open-btn:hover { background: var(--n-100); color: var(--text-body); }
[data-theme="dark"] .aseman-sidebar-open-btn:hover { background: var(--n-800); }

.aseman-topbar-title {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aseman-topbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Theme toggle icon visibility */
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ── Messages viewport ───────────────────────────────────── */
.aseman-messages-viewport {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--n-200) transparent;
}

.aseman-messages-viewport::-webkit-scrollbar { width: 5px; }
.aseman-messages-viewport::-webkit-scrollbar-thumb {
  background: var(--n-200);
  border-radius: 3px;
}

[data-theme="dark"] .aseman-messages-viewport { scrollbar-color: var(--n-700) transparent; }
[data-theme="dark"] .aseman-messages-viewport::-webkit-scrollbar-thumb { background: var(--n-700); }

.aseman-messages-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Welcome state */
.aseman-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 48px 24px;
}

.aseman-welcome-logo {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  object-fit: cover;
}

.aseman-welcome h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-body);
}

.aseman-welcome p {
  font-size: 14.5px;
  color: var(--text-muted);
}

/* Message rows */
.aseman-message {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aseman-message.user   { align-items: flex-start; }
.aseman-message.ai     { align-items: flex-end; }

.aseman-message-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  padding: 0 4px;
}

.aseman-message.user .aseman-message-meta { flex-direction: row-reverse; }

.aseman-message-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

.aseman-bubble {
  max-width: min(540px, 84%);
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.aseman-message.user .aseman-bubble {
  background: var(--bubble-user-bg);
  color: var(--bubble-user-fg);
  border-bottom-right-radius: var(--radius-sm);
}

.aseman-message.ai .aseman-bubble {
  background: var(--bubble-ai-bg);
  color: var(--bubble-ai-fg);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

/* Code blocks inside bubbles */
.aseman-bubble pre {
  background: var(--n-900);
  color: var(--n-100);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  margin: 8px 0;
}

[data-theme="dark"] .aseman-bubble pre {
  background: hsl(220 18% 10%);
}

.aseman-bubble code {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 13px;
}

/* Typing indicator */
.aseman-typing .aseman-bubble {
  padding: 14px 20px;
}

.aseman-typing-dots {
  display: flex;
  gap: 5px;
  align-items: center;
}

.aseman-typing-dots span {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: aseman-bounce 1.2s ease-in-out infinite;
}

.aseman-typing-dots span:nth-child(2) { animation-delay: .2s; }
.aseman-typing-dots span:nth-child(3) { animation-delay: .4s; }

@keyframes aseman-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: .5; }
  40%           { transform: translateY(-6px); opacity: 1; }
}

/* Message actions (copy, etc.) */
.aseman-message-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition);
}

.aseman-message:hover .aseman-message-actions { opacity: 1; }

.aseman-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--n-100);
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.aseman-action-btn:hover { background: var(--n-200); color: var(--text-body); }
[data-theme="dark"] .aseman-action-btn { background: var(--n-800); }
[data-theme="dark"] .aseman-action-btn:hover { background: var(--n-700); color: var(--n-100); }

/* ── Composer outer ──────────────────────────────────────── */
.aseman-composer-outer {
  padding: 12px 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.aseman-composer {
  width: 100%;
  max-width: 720px;
  background: var(--composer-bg);
  border: 1px solid var(--composer-border);
  border-radius: var(--radius-xl);
  padding: 10px 12px 12px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.aseman-composer:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px hsl(262 64% 52% / 14%), var(--shadow-sm);
}

/* Mode strip */
.aseman-mode-strip {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--composer-border);
  margin-bottom: 10px;
}

.aseman-mode-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 99px;
  background: var(--pill-bg);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition);
  white-space: nowrap;
}

.aseman-mode-pill:hover {
  background: var(--n-200);
  color: var(--text-body);
  border-color: var(--n-300);
}

[data-theme="dark"] .aseman-mode-pill:hover {
  background: var(--n-700);
  color: var(--n-200);
}

.aseman-mode-pill.active {
  background: var(--pill-active-bg);
  color: var(--pill-active-fg);
  border-color: var(--a-500);
}

.aseman-mode-pill.active:hover {
  background: var(--a-600);
  border-color: var(--a-600);
  color: #fff;
}

.aseman-mode-pill:focus-visible {
  outline: 2px solid var(--a-400);
  outline-offset: 2px;
}

/* Input row */
.aseman-input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

/* Attach button — circular */
.aseman-attach-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--attach-bg);
  color: var(--text-muted);
  cursor: pointer;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    transform var(--transition);
}

.aseman-attach-btn:hover {
  background: var(--attach-hover);
  border-color: var(--n-300);
  color: var(--text-body);
  transform: rotate(45deg);
}

.aseman-attach-btn:focus-visible {
  outline: 2px solid var(--a-400);
  outline-offset: 2px;
}

/* Textarea wrap */
.aseman-textarea-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.aseman-textarea {
  width: 100%;
  min-height: 36px;
  max-height: 180px;
  padding: 7px 4px;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--text-body);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.6;
  resize: none;
  outline: none;
  overflow-y: auto;
  scrollbar-width: thin;
}

.aseman-textarea::placeholder { color: var(--text-muted); }

/* File preview */
.aseman-file-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.aseman-file-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px 3px 6px;
  border-radius: 99px;
  background: var(--n-100);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

[data-theme="dark"] .aseman-file-chip {
  background: var(--n-800);
  border-color: var(--n-700);
}

.aseman-file-chip-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border: none;
  border-radius: 50%;
  background: var(--n-200);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 11px;
  flex-shrink: 0;
  padding: 0;
  line-height: 1;
  transition: background var(--transition);
}

.aseman-file-chip-remove:hover { background: var(--n-300); }

/* Send button */
.aseman-send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  border: none;
  background: var(--send-idle);
  color: #ffffff;
  cursor: pointer;
  transition:
    background var(--transition),
    transform var(--transition),
    opacity var(--transition);
}

.aseman-send-btn:hover:not(:disabled) {
  background: var(--send-hover);
  transform: scale(1.06);
}

.aseman-send-btn:active:not(:disabled) {
  transform: scale(.96);
}

.aseman-send-btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.aseman-send-btn:focus-visible {
  outline: 2px solid var(--a-400);
  outline-offset: 2px;
}

/* Disclaimer */
.aseman-disclaimer {
  font-size: 11.5px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

/* ── Loading / Error states ──────────────────────────────── */
.aseman-error-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  background: hsl(0 60% 50%);
  color: #fff;
  font-size: 14px;
  z-index: 9999;
  box-shadow: var(--shadow-md);
  animation: aseman-slide-up .2s ease forwards;
}

@keyframes aseman-slide-up {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 700px) {
  .aseman-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 80vw;
    max-width: 300px;
    z-index: 200;
    transform: translateX(100%);
    transition: transform .22s ease;
    box-shadow: var(--shadow-md);
  }

  .aseman-sidebar.open {
    transform: translateX(0);
  }

  .aseman-sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: hsl(220 18% 8% / 50%);
    z-index: 199;
  }

  .aseman-sidebar-overlay.visible { display: block; }

  .aseman-messages-inner {
    padding: 20px 12px 8px;
    gap: 16px;
  }

  .aseman-composer-outer {
    padding: 8px 12px 12px;
  }

  .aseman-mode-strip {
    gap: 4px;
  }

  .aseman-mode-pill {
    font-size: 12px;
    padding: 4px 10px;
  }

  .aseman-bubble {
    max-width: 92%;
    font-size: 14.5px;
  }

  .aseman-topbar {
    padding: 10px 14px;
  }
}

@media (max-width: 400px) {
  .aseman-mode-pill span.pill-label { display: none; }
  .aseman-mode-pill { padding: 5px 8px; }
}

/* ── Reduced motion ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .aseman-chat-wrap *,
  .aseman-chat-wrap *::before,
  .aseman-chat-wrap *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}