/* ==========================================================================
   NEXA — Main AI Chat Workspace (Light & Dark Theme Compatible)
   ========================================================================== */

.nexa-chat-workspace {
  flex: 1;
  height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: transparent;
  overflow: hidden;
}

/* Mobile Header Bar */
.mobile-top-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--sidebar-bg);
  z-index: 10;
  transition: background-color var(--transition-normal);
}

@media (max-width: 768px) {
  .mobile-top-bar {
    display: flex;
  }
}

.btn-sidebar-toggle {
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.btn-sidebar-toggle:hover {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-purple);
}

/* ==========================================================================
   1. UNCOMMENCED INITIAL HERO VIEW (Robot + Centered Input)
   ========================================================================== */
.initial-welcome-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1.5rem 2.5rem 1.5rem;
  text-align: center;
  position: relative;
  z-index: 2;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  transition: var(--transition-normal);
}

.welcome-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid var(--border-subtle);
  color: var(--primary-violet);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  box-shadow: 0 2px 10px rgba(139, 92, 246, 0.1);
}

.welcome-eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--secondary-cyan);
  box-shadow: 0 0 8px var(--secondary-cyan);
}

.welcome-headline {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
  background: linear-gradient(135deg, var(--text-main) 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 3D Spline Robot Wrapper — Hidden Watermark Logo */
.robot-3d-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 360px;
  margin: 0 auto 0.75rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.spline-canvas-container {
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 2;
  overflow: hidden;
}

/* Hide Spline branding/watermark badge ("Built with Spline") cleanly via clipping */
.spline-canvas-container iframe {
  width: 110%;
  height: 125%;
  position: absolute;
  top: -4%;
  left: -5%;
  border: none;
  outline: none;
  background: transparent;
  display: block;
  clip-path: inset(0 0 45px 0);
}

.welcome-subheadline {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.welcome-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   2. MESSAGE COMPOSER INPUT BOX
   ========================================================================== */
.composer-box-wrapper {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.composer-glass {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.65rem 0.65rem 1.25rem;
  background: var(--composer-glass-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
}

.composer-glass:focus-within {
  border-color: var(--primary-purple);
  box-shadow: 
    0 25px 50px -10px rgba(139, 92, 246, 0.25),
    0 0 25px rgba(6, 182, 212, 0.2);
}

.composer-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-family: var(--font-sans);
}

.composer-input::placeholder {
  color: var(--text-subtle);
}

.composer-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.composer-icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  padding: 0.45rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.composer-icon-btn:hover {
  color: var(--primary-purple);
  background: rgba(139, 92, 246, 0.12);
}

.btn-send-message {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-purple), var(--secondary-cyan));
  border: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.15rem;
  transition: var(--transition-fast);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
}

.btn-send-message:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.45);
}

/* Model Action Chips */
.quick-action-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.model-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.model-chip:hover {
  color: var(--primary-purple);
  background: rgba(139, 92, 246, 0.08);
  border-color: var(--border-subtle);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(139, 92, 246, 0.15);
}

.model-chip.active,
.model-chip.selected {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.22), rgba(6, 182, 212, 0.18)) !important;
  border-color: var(--primary-purple) !important;
  color: var(--text-main) !important;
  font-weight: 700 !important;
  box-shadow: 0 0 14px rgba(139, 92, 246, 0.3) !important;
}

.model-chip.active i,
.model-chip.selected i {
  color: #10B981 !important;
}

.model-chip i {
  color: var(--secondary-cyan);
}

/* ==========================================================================
   Attached File Floating Pill Preview Bar (Composer Attachment Card)
   ========================================================================== */
.attached-file-preview-bar {
  display: flex;
  justify-content: flex-end;
  padding: 0 0.5rem 0.5rem 0.5rem;
  width: 100%;
}

.composer-attached-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface-card, #1E2022);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.15));
  border-radius: 12px;
  padding: 0.5rem 0.85rem 0.5rem 1.75rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(12px);
  margin-left: auto;
}

.pill-remove-btn {
  position: absolute;
  top: -8px;
  left: -8px;
  background: #1E2022;
  border: 1px solid var(--border-light, rgba(255, 255, 255, 0.2));
  border-radius: 50%;
  color: var(--text-muted, #A1A1AA);
  font-size: 1rem;
  width: 22px;
  height: 22px;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, color 0.15s ease, background-color 0.15s ease;
  z-index: 5;
}

.pill-remove-btn:hover {
  color: #EF4444;
  background: rgba(239, 68, 68, 0.15);
  transform: scale(1.15);
}

.pill-info-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.pill-filename {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main, #FFFFFF);
  line-height: 1.2;
}

.pill-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted, #94A3B8);
  margin-top: 0.15rem;
}

.pill-icon-badge {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10B981;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* ==========================================================================
   3. CHAT MODE STREAM & MESSAGES
   ========================================================================== */
.active-chat-container {
  flex: 1;
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.chat-header-bar {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--chat-header-bg);
  backdrop-filter: blur(16px);
  transition: background-color var(--transition-normal);
}

.chat-title-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
}

.chat-status-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #10B981;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(16, 185, 129, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.messages-stream-list {
  flex: 1;
  overflow-y: auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}

.message-row {
  display: flex;
  gap: 1rem;
}

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

.msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.88rem;
  flex-shrink: 0;
}

.avatar-nexa-icon {
  background: linear-gradient(135deg, var(--primary-purple), var(--secondary-cyan));
  color: #fff;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.avatar-user-icon {
  background: var(--user-avatar-bg);
  color: var(--text-main);
  border: 1px solid var(--border-light);
}

.msg-bubble {
  max-width: 82%;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  font-size: 0.98rem;
  line-height: 1.6;
}

.msg-bubble.user-bubble {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(6, 182, 212, 0.1));
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-top-right-radius: 4px;
}

.msg-bubble.nexa-bubble {
  background: var(--msg-nexa-bg);
  border: 1px solid var(--border-light);
  color: var(--text-main);
  border-top-left-radius: 4px;
  box-shadow: var(--shadow-sm);
}

/* AI Model Inference Result Box */
.model-result-box {
  background: var(--model-result-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 0.85rem;
  box-shadow: var(--shadow-md);
}

.model-result-header {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background: rgba(6, 182, 212, 0.12);
  color: var(--secondary-cyan);
  margin-bottom: 0.65rem;
  font-weight: 600;
}

.model-pred-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.gemini-block {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--secondary-cyan);
  background: rgba(6, 182, 212, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: var(--text-main);
}

.gemini-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--secondary-cyan);
  margin-bottom: 0.3rem;
  text-transform: uppercase;
}

/* Bottom Fixed Composer */
.bottom-chat-composer {
  padding: 1rem 1.5rem 1.5rem 1.5rem;
  background: linear-gradient(180deg, transparent 0%, var(--bg-light) 60%);
  transition: background var(--transition-normal);
}