/* ═══════════════════════════════════════
   COMPOSER HIGHLIGHTING STYLES
   ═══════════════════════════════════════ */

/* Composer Container */
.composer-container {
  flex-shrink: 0;
  padding: 20px 32px 24px;
  background: var(--bg);
  border-top: 1px solid transparent;
  position: relative;
  z-index: 10;
}

/* Subtle top border gradient */
.composer-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 20%, var(--border) 80%, transparent);
}

/* Composer Box */
.composer {
  max-width: 820px;
  margin: 0 auto;
  border: 2px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 0 1px rgba(0, 0, 0, 0.04);
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  overflow: visible;
}

/* Glow effect on focus/click */
.composer::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), #00c853);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
  filter: blur(16px);
}

/* Highlight on focus (when textarea is focused) */
.composer:focus-within {
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(0, 167, 60, 0.2),
              0 0 0 4px rgba(0, 167, 60, 0.1),
              0 0 1px rgba(0, 167, 60, 0.3);
  transform: translateY(-2px);
}

.composer:focus-within::before {
  opacity: 0.2;
}

/* Highlight on click anywhere in composer */
.composer:active {
  transform: translateY(-1px);
  transition-duration: 0.1s;
}

.composer.highlighted {
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(0, 167, 60, 0.2),
              0 0 0 4px rgba(0, 167, 60, 0.1),
              0 0 1px rgba(0, 167, 60, 0.3);
  transform: translateY(-2px);
}

.composer.highlighted::before {
  opacity: 0.2;
}

/* Dark theme adjustments */
[data-theme="dark"] .composer {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 1px rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .composer:focus-within,
[data-theme="dark"] .composer.highlighted {
  box-shadow: 0 8px 32px rgba(0, 167, 60, 0.3),
              0 0 0 4px rgba(0, 167, 60, 0.15),
              0 0 1px rgba(0, 167, 60, 0.5);
}

[data-theme="dark"] .composer:focus-within::before,
[data-theme="dark"] .composer.highlighted::before {
  opacity: 0.25;
}

/* Composer attachments */
.composer-attachments {
  display: none;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px 0;
}

.composer-attachments.visible {
  display: flex;
}

/* Composer input area */
.composer-input-area {
  padding: 14px 18px;
}

.composer-textarea {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  resize: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  max-height: 200px;
  min-height: 24px;
  font-family: 'Open Sans', sans-serif;
}

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

/* Composer toolbar */
.composer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px 12px;
  border-top: 1px solid var(--border);
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text-muted);
  transition: all 0.2s ease;
  cursor: pointer;
}

.toolbar-btn:hover {
  background: var(--hover-neutral);
  color: var(--text-primary);
}

/* Model selector */
.model-selector {
  position: relative;
}

.toolbar-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s ease;
  cursor: pointer;
}

.toolbar-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.toolbar-chip.active {
  background: var(--primary-light);
  border-color: rgba(0, 167, 60, 0.3);
  color: var(--primary);
}

/* Send button */
.send-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
}

.send-btn:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: scale(1.05);
}

.send-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.send-btn:disabled {
  background: var(--border);
  cursor: not-allowed;
  opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
  .composer-container {
    padding: 16px 20px 20px;
  }

  .composer {
    border-radius: 16px;
  }
}

@media (max-width: 480px) {
  .composer-container {
    padding: 12px 16px 16px;
  }

  .toolbar-chip span {
    display: none;
  }
}