/**
 * Katholisch.ai Chat Styles
 * Styles for the main chat interface
 */

/* ====================================
   Layout Structure
   ==================================== */

.app-container {
    display: flex;
    height: 100vh;
    height: 100dvh; /* Better mobile support */
    overflow: hidden;
}

/* ====================================
   Left Sidebar
   ==================================== */

#sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--ktv-neutral-200);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-smooth);
    z-index: var(--z-sidebar);
    position: relative;
}

@media (max-width: 1024px) {
    #sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        box-shadow: var(--shadow-strong);
        z-index: var(--z-modal); /* Above the overlay when open */
    }
    
    #sidebar.open {
        transform: translateX(0);
    }
}

#sidebar.collapsed {
    width: 0;
    min-width: 0;
    overflow: hidden;
    padding: 0;
    border: none;
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--ktv-neutral-200);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--ktv-brand) 0%, var(--ktv-brand-shade) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-soft), var(--shadow-glow);
    flex-shrink: 0;
}

.sidebar-logo i {
    color: white;
    font-size: 1.25rem;
}

.sidebar-title {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--ktv-text);
}

.sidebar-close-btn {
    display: none;
    margin-left: auto;
    padding: 0.5rem;
    background: var(--ktv-neutral-100);
    border: 1px solid var(--ktv-neutral-200);
    border-radius: var(--radius-md);
    cursor: pointer;
}

@media (max-width: 1024px) {
    .sidebar-close-btn {
        display: flex;
    }
}

/* Sidebar Collapse/Expand Buttons */
.sidebar-collapse-btn {
    position: absolute;
    right: -14px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 56px;
    background: white;
    border: 1px solid var(--ktv-neutral-200);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ktv-neutral-400);
    z-index: 45;
    transition: all var(--transition-normal);
    box-shadow: 2px 0 4px rgba(0,0,0,0.05);
}

.sidebar-collapse-btn:hover {
    color: var(--ktv-brand);
    background: var(--ktv-tint-50);
    border-color: var(--ktv-brand);
}

.sidebar-collapse-btn i {
    font-size: 0.625rem;
}

.sidebar-expand-btn {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 56px;
    background: white;
    border: 1px solid var(--ktv-neutral-200);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--ktv-neutral-400);
    z-index: 45;
    transition: all var(--transition-normal);
    box-shadow: 2px 0 4px rgba(0,0,0,0.05);
}

.sidebar-expand-btn:hover {
    color: var(--ktv-brand);
    background: var(--ktv-tint-50);
    border-color: var(--ktv-brand);
}

.sidebar-expand-btn i {
    font-size: 0.625rem;
}

.sidebar-expand-btn.visible {
    display: flex;
}

@media (max-width: 1024px) {
    .sidebar-collapse-btn,
    .sidebar-expand-btn {
        display: none !important;
    }
}

/* New Chat Button */
.new-chat-btn {
    margin: 1rem;
    padding: 0.875rem 1.25rem;
    background: linear-gradient(135deg, var(--ktv-brand) 0%, var(--ktv-brand-shade) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-soft);
}

.new-chat-btn:hover {
    background: linear-gradient(135deg, var(--ktv-brand-shade) 0%, var(--ktv-brand-deep) 100%);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

/* Chat List */
.chat-list-container {
    flex: 1;
    overflow-y: auto;
    padding: 0 1rem 1rem;
}

.chat-list-header {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ktv-neutral-500);
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
}

#chat-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* User Info */
.user-info {
    padding: 1rem 1rem 0.5rem 1rem;
    border-top: 1px solid var(--ktv-neutral-200);
    margin-top: auto;
}

.user-profile-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-lg);
    transition: background var(--transition-normal);
    text-decoration: none;
    color: var(--ktv-text);
}

.user-profile-link:hover {
    background: var(--ktv-tint-50);
}

.user-profile-link i {
    color: var(--ktv-brand);
    font-size: 1.25rem;
}

.user-profile-link span {
    font-weight: 600;
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    border: none;
    background: transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    color: var(--ktv-neutral-700);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.logout-btn:hover {
    background: var(--ktv-tint-50);
    color: var(--ktv-brand-shade);
}

/* Usage Stats */
.usage-stats {
    padding: 0.5rem 0.75rem;
    font-size: var(--text-sm);
    color: var(--ktv-neutral-500);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-top: 1px solid var(--ktv-neutral-100);
    font-size: var(--text-xs);
}

.sidebar-footer a {
    color: var(--ktv-neutral-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.sidebar-footer a:hover {
    color: var(--ktv-brand);
}

.sidebar-footer .footer-divider {
    color: var(--ktv-neutral-300);
}

.sidebar-footer .language-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.sidebar-footer .lang-link {
    font-weight: 500;
    padding: 0.125rem 0.25rem;
    border-radius: var(--radius-sm);
}

.sidebar-footer .lang-link.active {
    color: var(--ktv-brand);
    font-weight: 600;
}

.sidebar-footer .lang-sep {
    color: var(--ktv-neutral-300);
}

/* ====================================
   Main Chat Area
   ==================================== */

#chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: white;
    transition: margin-right var(--transition-slow);
}

/* Chat Header */
.chat-header {
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--ktv-neutral-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    gap: 1rem;
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.menu-btn {
    display: none;
    padding: 0.625rem;
    background: var(--ktv-neutral-100);
    border: 1px solid var(--ktv-neutral-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.menu-btn:hover {
    background: var(--ktv-tint-50);
    border-color: var(--ktv-brand);
}

@media (max-width: 1024px) {
    .menu-btn {
        display: flex;
    }
}

.chat-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.chat-title-label {
    font-size: var(--text-sm);
    color: var(--ktv-neutral-500);
}

.chat-title-name {
    font-weight: 600;
    color: var(--ktv-text);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.panel-toggle-btn {
    padding: 0.625rem 1rem;
    background: white;
    border: 1px solid var(--ktv-neutral-200);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--ktv-neutral-700);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-soft);
}

.panel-toggle-btn:hover {
    border-color: var(--ktv-brand);
    color: var(--ktv-brand);
}

.panel-toggle-btn.active {
    background: var(--ktv-tint-50);
    border-color: var(--ktv-brand);
    color: var(--ktv-brand);
}

.panel-toggle-btn i {
    color: var(--ktv-brand);
}

@media (max-width: 640px) {
    .panel-toggle-btn span {
        display: none;
    }
    
    .panel-toggle-btn {
        padding: 0.625rem;
    }
}

/* ====================================
   Chat Messages
   ==================================== */

#chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background: linear-gradient(180deg, var(--ktv-neutral-100) 0%, white 100%);
}

@media (max-width: 640px) {
    #chat-messages {
        padding: 1rem;
    }
}

.chat-messages-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

/* Message Styles */
.message-wrapper {
    margin-bottom: 1rem;
}

.message-user {
    display: flex;
    justify-content: flex-end;
}

.message-assistant {
    display: flex;
    justify-content: flex-start;
}

.message-bubble {
    max-width: 85%;
    padding: 1rem 1.25rem;
    border-radius: 1.25rem;
    box-shadow: var(--shadow-soft);
}

@media (max-width: 640px) {
    .message-bubble {
        max-width: 92%;
        padding: 0.875rem 1rem;
    }
}

.message-user .message-bubble {
    background: linear-gradient(135deg, var(--ktv-tint-50) 0%, var(--ktv-tint-100) 100%);
    border: 1px solid var(--ktv-tint-100);
    border-bottom-right-radius: 0.375rem;
}

.message-assistant .message-bubble {
    background: white;
    border: 1px solid var(--ktv-neutral-200);
    border-bottom-left-radius: 0.375rem;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.message-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--ktv-brand-shade);
}

.message-content {
    line-height: var(--leading-relaxed);
    color: var(--ktv-text);
    word-break: break-word;
}

.message-time {
    font-size: var(--text-xs);
    color: var(--ktv-neutral-500);
}

/* Message Content Formatting */
.message-content pre {
    background: #2d2d2d;
    color: #f8f8f2;
    border-radius: var(--radius-lg);
    padding: 1rem;
    margin: 1rem 0;
    overflow-x: auto;
}

.message-content code:not([class*="language-"]) {
    background: var(--ktv-tint-50);
    padding: 0.125rem 0.25rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875em;
    color: var(--ktv-brand-shade);
}

.message-content ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin: 0.5rem 0;
}

.message-content ol {
    list-style-type: decimal;
    padding-left: 1.5rem;
    margin: 0.5rem 0;
}

.message-content h1, .message-content h2, 
.message-content h3, .message-content h4 {
    font-weight: 600;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--ktv-text);
}

.message-content blockquote {
    border-left: 3px solid var(--ktv-brand);
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: var(--ktv-neutral-700);
}

/* Citation Links */
.citation-ref {
    color: var(--ktv-brand);
    text-decoration: none;
    font-weight: 500;
    padding: 0 2px;
    cursor: pointer;
}

.citation-ref:hover {
    color: var(--ktv-brand-shade);
    text-decoration: underline;
    background-color: var(--ktv-tint-50);
    border-radius: 2px;
}

/* ====================================
   Input Area
   ==================================== */

.input-area {
    padding: 1rem 1.25rem 1.25rem;
    background: white;
    border-top: 1px solid var(--ktv-neutral-200);
}

@media (max-width: 640px) {
    .input-area {
        padding: 0.875rem;
        padding-bottom: calc(0.875rem + env(safe-area-inset-bottom, 0));
    }
}

.input-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--ktv-neutral-100);
    border: 2px solid var(--ktv-neutral-200);
    border-radius: 1rem;
    transition: all var(--transition-normal);
}

.input-container:focus-within {
    border-color: var(--ktv-brand);
    box-shadow: 0 0 0 4px rgba(238, 156, 68, 0.1);
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-size: 1rem;
    line-height: 1.5;
    padding: 0.5rem;
    resize: none;
    min-height: 24px;
    max-height: 120px;
    font-family: inherit;
}

.send-btn, .stop-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 0.625rem;
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.send-btn {
    background: linear-gradient(135deg, var(--ktv-brand) 0%, var(--ktv-brand-shade) 100%);
    color: white;
    box-shadow: var(--shadow-soft);
}

.send-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--ktv-brand-shade) 0%, var(--ktv-brand-deep) 100%);
    transform: translateY(-1px);
}

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

.stop-btn {
    background: #DC2626;
    color: white;
}

.stop-btn:hover {
    background: #B91C1C;
}

@media (max-width: 640px) {
    .send-btn span, .stop-btn span {
        display: none;
    }
    
    .send-btn, .stop-btn {
        padding: 0.75rem;
    }
}

.input-hint {
    font-size: var(--text-sm);
    color: var(--ktv-neutral-500);
    margin-top: 0.625rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-hint::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--ktv-brand);
    border-radius: 50%;
    flex-shrink: 0;
}

@media (max-width: 640px) {
    .input-hint {
        display: none;
    }
}

/* ====================================
   Typing Indicator
   ==================================== */

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--ktv-brand);
    animation: bounce 1.4s ease-in-out infinite;
}

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

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-10px); }
}

/* ====================================
   Welcome Screen
   ==================================== */

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
}

.welcome-icon-large {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--ktv-tint-50) 0%, var(--ktv-tint-100) 100%);
    border: 3px solid var(--ktv-tint-100);
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-soft), var(--shadow-glow);
}

.welcome-icon-large i {
    font-size: 2.5rem;
    color: var(--ktv-brand);
}

.welcome-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--ktv-text);
    margin-bottom: 0.75rem;
}

.welcome-subtitle {
    font-size: 1rem;
    color: var(--ktv-neutral-500);
    max-width: 400px;
}

@media (max-width: 640px) {
    .welcome-screen {
        padding: 2rem 1.5rem;
    }
    
    .welcome-icon-large {
        width: 80px;
        height: 80px;
    }
    
    .welcome-icon-large i {
        font-size: 2rem;
    }
    
    .welcome-title {
        font-size: 1.5rem;
    }
}

/* ====================================
   Right Panel (Videos/Citations)
   ==================================== */

#right-panel {
    width: var(--panel-width);
    min-width: var(--panel-width);
    background: var(--panel-bg);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-smooth);
    position: relative;
    z-index: var(--z-fixed);
}

#right-panel.collapsed {
    width: 0;
    min-width: 0;
    overflow: hidden;
}

@media (max-width: 1280px) {
    #right-panel {
        position: fixed;
        right: 0;
        top: 0;
        bottom: 0;
        box-shadow: -4px 0 24px rgba(0,0,0,0.3);
        z-index: var(--z-modal-backdrop);
    }
    
    #right-panel.collapsed {
        transform: translateX(100%);
        width: var(--panel-width);
        min-width: var(--panel-width);
    }
}

@media (max-width: 640px) {
    #right-panel {
        width: 100%;
        min-width: 100%;
    }
    
    #right-panel.collapsed {
        width: 100%;
        min-width: 100%;
    }
}

/* Panel Header */
.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--panel-card-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.panel-tabs {
    display: flex;
    gap: 0.25rem;
    background: var(--panel-card-bg);
    padding: 0.25rem;
    border-radius: var(--radius-lg);
    flex: 1;
}

.panel-tab {
    flex: 1;
    padding: 0.625rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--ktv-neutral-300);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.panel-tab:hover {
    color: white;
    background: var(--panel-card-hover);
}

.panel-tab.active {
    background: var(--ktv-brand);
    color: white;
}

.panel-tab .tab-badge {
    background: rgba(255,255,255,0.2);
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-md);
    min-width: 1.25rem;
    text-align: center;
}

.panel-tab.active .tab-badge {
    background: rgba(255,255,255,0.3);
}

.panel-close-btn {
    padding: 0.5rem;
    background: var(--panel-card-bg);
    border: 1px solid var(--panel-card-hover);
    border-radius: var(--radius-md);
    color: var(--ktv-neutral-300);
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.panel-close-btn:hover {
    background: var(--panel-card-hover);
    color: white;
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    display: none;
}

.panel-content.active {
    display: block;
}

/* Panel Scrollbar */
#right-panel ::-webkit-scrollbar-track {
    background: var(--panel-card-bg);
}

#right-panel ::-webkit-scrollbar-thumb {
    background: var(--panel-card-hover);
}

/* ====================================
   Videos Content
   ==================================== */

#videos-container {
    padding: 1rem;
}

.video-results-header {
    margin-bottom: 1rem;
}

.results-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
    color: var(--ktv-neutral-300);
}

.results-count i {
    color: var(--ktv-brand);
}

.video-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.video-card {
    background: var(--panel-card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-slow);
    border: 1px solid transparent;
}

.video-card:hover {
    background: var(--panel-card-hover);
    border-color: var(--ktv-brand);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.video-thumbnail-container {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.video-card:hover .video-thumbnail {
    transform: scale(1.05);
}

.video-timestamp {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(0,0,0,0.85);
    color: white;
    padding: 0.375rem 0.625rem;
    border-radius: 6px;
    font-size: var(--text-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.video-timestamp i {
    font-size: var(--text-xs);
    color: var(--ktv-brand);
}

.video-relevance {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(0,0,0,0.5);
}

.relevance-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--ktv-brand) 0%, var(--ktv-brand-shade) 100%);
}

.video-info {
    padding: 1rem;
}

.video-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.video-excerpt {
    font-size: var(--text-sm);
    color: var(--ktv-neutral-300);
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: var(--text-xs);
    color: var(--ktv-neutral-500);
}

.video-date {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.video-actions {
    padding: 0 1rem 1rem;
}

.video-play-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--ktv-brand);
    color: var(--panel-bg);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.video-play-btn:hover {
    background: var(--ktv-brand-shade);
}

/* Video States */
.video-loading, .video-empty, .video-welcome, .video-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    min-height: 300px;
}

.loading-spinner {
    position: relative;
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--ktv-brand);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-ring:nth-child(2) {
    width: 80%;
    height: 80%;
    top: 10%;
    left: 10%;
    border-top-color: var(--ktv-brand-shade);
    animation-delay: -0.3s;
}

.spinner-ring:nth-child(3) {
    width: 60%;
    height: 60%;
    top: 20%;
    left: 20%;
    border-top-color: var(--ktv-brand-deep);
    animation-delay: -0.6s;
}

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

.video-loading p {
    color: var(--ktv-neutral-300);
}

.empty-icon, .welcome-icon, .error-icon {
    width: 80px;
    height: 80px;
    background: var(--panel-card-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.empty-icon i, .welcome-icon i {
    font-size: 2rem;
    color: var(--ktv-brand);
}

.error-icon {
    background: rgba(220, 38, 38, 0.1);
}

.error-icon i {
    font-size: 2rem;
    color: #DC2626;
}

.video-empty h4, .video-welcome h4, .video-error h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.5rem;
}

.video-empty p, .video-welcome p, .video-error p {
    color: var(--ktv-neutral-300);
    font-size: 0.9375rem;
    max-width: 280px;
}

.retry-btn {
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--panel-card-bg);
    border: 1px solid var(--panel-card-hover);
    color: white;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
}

.retry-btn:hover {
    background: var(--panel-card-hover);
    border-color: var(--ktv-brand);
}

/* ====================================
   Citations Content
   ==================================== */

#citations-content {
    padding: 1rem;
}

.citations-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    min-height: 300px;
}

.citations-empty i {
    font-size: 2.5rem;
    color: var(--ktv-neutral-500);
    margin-bottom: 1rem;
}

.citations-empty p {
    color: var(--ktv-neutral-300);
}

.citation-item {
    background: var(--panel-card-bg);
    border: 1px solid var(--panel-card-hover);
    border-radius: var(--radius-lg);
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: all var(--transition-normal);
}

.citation-item:hover {
    border-color: var(--ktv-brand);
}

.citation-item .citation-number {
    color: var(--ktv-brand);
    font-weight: 600;
}

.citation-item .citation-title {
    color: white;
    font-weight: 500;
    margin-bottom: 0.375rem;
}

.citation-item .citation-author {
    color: var(--ktv-neutral-300);
    font-size: var(--text-sm);
    margin-bottom: 0.5rem;
}

.citation-item .citation-text {
    color: var(--ktv-neutral-300);
    font-size: var(--text-sm);
    font-style: italic;
    background: var(--panel-card-hover);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
    line-height: 1.5;
}

.citation-item .citation-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--ktv-brand);
    font-size: var(--text-sm);
    font-weight: 500;
    margin-top: 0.75rem;
    text-decoration: none;
}

.citation-item .citation-link:hover {
    text-decoration: underline;
}

/* ====================================
   Guest User Styles
   ==================================== */

.guest-info-box {
    background: var(--ktv-tint-50);
    padding: 1rem;
    border-radius: var(--radius-lg);
}

.guest-info-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.guest-info-header i {
    color: var(--ktv-brand);
}

.guest-info-header span {
    font-weight: 600;
}

.guest-usage-info {
    font-size: var(--text-sm);
    color: var(--ktv-neutral-700);
}

.guest-register-btn {
    display: block;
    text-align: center;
    background: var(--ktv-brand);
    color: white;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    margin-top: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-sm);
}

.guest-register-btn:hover {
    background: var(--ktv-brand-shade);
    color: white;
}

.guest-login-link {
    display: block;
    text-align: center;
    color: var(--ktv-brand);
    padding: 0.5rem 1rem;
    margin-top: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-sm);
}

.guest-login-link:hover {
    color: var(--ktv-brand-shade);
}

/* Guest chat list message */
.guest-chat-message {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--ktv-neutral-500);
}

.guest-chat-message i {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    display: block;
    color: var(--ktv-neutral-300);
}

.guest-chat-message p {
    font-size: var(--text-sm);
    margin-bottom: 0.5rem;
}

.guest-chat-message .benefits {
    font-size: var(--text-sm);
    color: var(--ktv-neutral-500);
    margin-bottom: 0.75rem;
}

.guest-chat-message a {
    display: inline-block;
    color: var(--ktv-brand);
    font-weight: 600;
    font-size: var(--text-sm);
    text-decoration: none;
}

.guest-chat-message a:hover {
    color: var(--ktv-brand-shade);
}

/* ====================================
   Response Settings
   ==================================== */

.response-settings-container {
    position: relative;
    margin-bottom: 0.75rem;
}

.response-settings-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    background: var(--ktv-tint-50);
    border: 1px solid var(--ktv-tint-100);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--ktv-neutral-700);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.response-settings-btn:hover {
    background: var(--ktv-tint-100);
    border-color: var(--ktv-brand);
}

.response-settings-btn i:first-child {
    color: var(--ktv-brand);
}

.response-settings-btn .settings-prefix {
    color: var(--ktv-neutral-500);
    font-weight: 400;
}

.response-settings-btn .settings-divider {
    color: var(--ktv-neutral-300);
}

.response-settings-btn .settings-chevron {
    font-size: 0.625rem;
    color: var(--ktv-neutral-400);
    transition: transform var(--transition-fast);
}

.response-settings-btn.active .settings-chevron {
    transform: rotate(180deg);
}

/* Settings Popover */
.response-settings-popover {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 0;
    width: 320px;
    max-height: 70vh;
    overflow-y: auto;
    background: white;
    border: 1px solid var(--ktv-neutral-200);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    z-index: var(--z-popover);
    padding: 1rem;
}

.response-settings-popover.hidden {
    display: none;
}

.settings-section {
    margin-bottom: 0.75rem;
}

.settings-section:last-child {
    margin-bottom: 0;
}

.settings-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--ktv-neutral-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.625rem;
}

.settings-label i {
    color: var(--ktv-brand);
}

.settings-divider-line {
    height: 1px;
    background: var(--ktv-neutral-200);
    margin: 1rem 0;
}

.settings-options {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.settings-options.length-options {
    flex-direction: row;
    gap: 0.5rem;
}

.settings-options.length-options .settings-option {
    flex: 1;
    text-align: center;
}

.settings-option {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    padding: 0.625rem 0.75rem;
    background: white;
    border: 1px solid var(--ktv-neutral-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.settings-option:hover {
    border-color: var(--ktv-brand);
    background: var(--ktv-tint-50);
}

.settings-option.active {
    border-color: var(--ktv-brand);
    background: var(--ktv-tint-50);
    box-shadow: 0 0 0 2px var(--ktv-tint-100);
}

.settings-option .option-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--ktv-text);
}

.settings-option .option-desc {
    font-size: var(--text-xs);
    color: var(--ktv-neutral-500);
}

.settings-option.active .option-title {
    color: var(--ktv-brand);
}

/* Mobile adjustments */
@media (max-width: 640px) {
    .response-settings-popover {
        width: calc(100vw - 2rem);
        left: 50%;
        transform: translateX(-50%);
        max-height: 60vh;
    }
    
    .settings-options.length-options {
        flex-direction: column;
    }
    
    .settings-options.length-options .settings-option {
        text-align: left;
    }
}