/* ============================================================================
   Wendy NPC Conversation Demo — Styles
   Warm, rustic Appalachian tones with modern chat UI
   ============================================================================ */

/* CSS Variables */
:root {
    /* Warm rustic palette */
    --color-bg: #1a1612;
    --color-bg-light: #231f1a;
    --color-bg-lighter: #2d2822;
    --color-bg-card: #332e27;
    --color-border: #4a4339;
    --color-border-light: #5a5247;
    
    /* Text colors */
    --color-text: #e8e0d4;
    --color-text-muted: #a89e8f;
    --color-text-dim: #7a7168;
    
    /* Accent colors */
    --color-accent: #c9956b;
    --color-accent-hover: #d9a87e;
    --color-accent-dim: #a07850;
    
    /* Message bubbles */
    --color-msg-wendy: #3a342c;
    --color-msg-user: #4a6741;
    --color-msg-user-hover: #557a4a;
    
    /* Affinity colors */
    --color-affinity-negative: #dc2626;
    --color-affinity-cold: #ea580c;
    --color-affinity-distant: #d97706;
    --color-affinity-neutral: #6b7280;
    --color-affinity-acquaintance: #65a30d;
    --color-affinity-friendly: #059669;
    --color-affinity-close: #0891b2;
    --color-affinity-trusted: #7c3aed;
    
    /* Affinity bar gradient */
    --affinity-gradient: linear-gradient(
        to right,
        #dc2626 0%,
        #ea580c 15%,
        #d97706 25%,
        #6b7280 35%,
        #6b7280 50%,
        #65a30d 60%,
        #059669 70%,
        #0891b2 85%,
        #7c3aed 100%
    );
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Sidebar */
    --sidebar-width: 300px;
}

/* ============================================================================
   Reset & Base
   ============================================================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-light);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

/* ============================================================================
   App Layout
   ============================================================================ */

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

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

.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background-color: var(--color-bg-light);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform var(--transition-normal);
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.sidebar-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.btn-new-chat {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-new-chat:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
}

.btn-new-chat:active {
    transform: translateY(0);
}

.btn-new-chat svg {
    flex-shrink: 0;
}

/* Conversation List */

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.conversation-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    margin-bottom: var(--spacing-xs);
    position: relative;
}

.conversation-item:hover {
    background-color: var(--color-bg-lighter);
}

.conversation-item.active {
    background-color: var(--color-bg-card);
}

.conversation-item-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background-color: var(--color-accent-dim);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    flex-shrink: 0;
}

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

.conversation-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: 2px;
}

.conversation-item-stage {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text);
}

.conversation-item-date {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    flex-shrink: 0;
}

.conversation-item-preview {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-item-delete {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background-color: transparent;
    border: none;
    color: var(--color-text-dim);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.conversation-item:hover .conversation-item-delete {
    opacity: 1;
}

.conversation-item-delete:hover {
    background-color: rgba(220, 38, 38, 0.2);
    color: var(--color-affinity-negative);
}

/* Sidebar overlay (mobile) */

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay.visible {
    display: block;
    opacity: 1;
}

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

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ============================================================================
   Chat Header
   ============================================================================ */

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-bg-light);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    z-index: 10;
}

.btn-menu {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background-color: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}

.btn-menu:hover {
    background-color: var(--color-bg-lighter);
    color: var(--color-text);
}

.header-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.header-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--color-accent);
    color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.header-text {
    display: flex;
    flex-direction: column;
}

.chat-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.stage-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ============================================================================
   Affinity Display
   ============================================================================ */

.affinity-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-left: auto;
    min-width: 180px;
    max-width: 280px;
    flex-shrink: 1;
}

.affinity-bar-container {
    flex: 1;
    height: 10px;
    background: var(--affinity-gradient);
    border-radius: var(--radius-full);
    position: relative;
    overflow: visible;
}

.affinity-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-lighter);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    pointer-events: none;
}

.affinity-marker {
    position: absolute;
    top: 50%;
    width: 14px;
    height: 14px;
    background-color: var(--color-text);
    border: 2px solid var(--color-bg-light);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    box-shadow: var(--shadow-md);
    transition: left var(--transition-slow);
    z-index: 2;
}

.affinity-value {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-muted);
    min-width: 32px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ============================================================================
   Messages Area
   ============================================================================ */

.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg);
    scroll-behavior: smooth;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

/* Message wrapper */

.message-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 80%;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-wrapper.wendy {
    align-self: flex-start;
}

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

/* Message avatar */

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    align-self: flex-end;
}

.message-wrapper.wendy .message-avatar {
    background-color: var(--color-accent-dim);
    color: var(--color-text);
}

.message-wrapper.user .message-avatar {
    background-color: var(--color-msg-user);
    color: var(--color-text);
}

/* Message content */

.message-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.message-wrapper.user .message-content {
    align-items: flex-end;
}

.message-bubble {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message-wrapper.wendy .message-bubble {
    background-color: var(--color-msg-wendy);
    color: var(--color-text);
    border-bottom-left-radius: var(--spacing-xs);
}

.message-wrapper.user .message-bubble {
    background-color: var(--color-msg-user);
    color: var(--color-text);
    border-bottom-right-radius: var(--spacing-xs);
}

.message-timestamp {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    padding: 0 var(--spacing-xs);
}

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

.typing-indicator {
    display: none;
    align-items: flex-end;
    gap: var(--spacing-sm);
    max-width: 80%;
    align-self: flex-start;
    animation: messageSlideIn 0.3s ease;
}

.typing-indicator.visible {
    display: flex;
}

.typing-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--color-accent-dim);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.typing-bubble {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-msg-wendy);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--spacing-xs);
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: var(--color-text-muted);
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) {
    animation-delay: 0s;
}

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

.typing-dot:nth-child(3) {
    animation-delay: 0.32s;
}

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

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

.input-area {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-bg-lighter);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    transition: border-color var(--transition-fast);
}

.input-container:focus-within {
    border-color: var(--color-accent-dim);
}

.message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-text);
    font-size: 0.95rem;
    font-family: inherit;
    line-height: 1.5;
    resize: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    max-height: 120px;
}

.message-input::placeholder {
    color: var(--color-text-dim);
}

.message-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-send {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background-color: var(--color-accent);
    border: none;
    color: var(--color-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
    flex-shrink: 0;
}

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

.btn-send:active:not(:disabled) {
    transform: scale(0.95);
}

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

.input-disabled-message {
    display: none;
    text-align: center;
    color: var(--color-affinity-negative);
    font-size: 0.85rem;
    font-weight: 500;
    padding: var(--spacing-sm) 0 0;
}

.input-disabled-message.visible {
    display: block;
}

/* ============================================================================
   Modal
   ============================================================================ */

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    animation: modalFadeIn 0.2s ease;
    pointer-events: none;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-overlay.visible {
    display: flex;
}

.modal {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.2s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.modal-message {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: var(--spacing-xl);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.btn-modal {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-cancel {
    background-color: var(--color-bg-lighter);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.btn-cancel:hover {
    background-color: var(--color-border);
    color: var(--color-text);
}

.btn-confirm {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

.btn-confirm:hover {
    background-color: var(--color-accent-hover);
}

.btn-modal:active {
    transform: scale(0.97);
}

/* ============================================================================
   Empty State
   ============================================================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-dim);
    min-height: 200px;
}

.empty-state-icon {
    font-size: 2.5rem;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 0.9rem;
}

/* ============================================================================
   Error Toast
   ============================================================================ */

.error-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background-color: rgba(220, 38, 38, 0.9);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 300;
    opacity: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    pointer-events: none;
}

.error-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================================
   Demo Mode
   ============================================================================ */

/* Demo screens — centered full-screen overlays */
.demo-screen {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 201;
}

.demo-welcome-content,
.demo-queue-content,
.demo-expired-content {
    text-align: center;
    max-width: 480px;
    padding: 3rem 2rem;
}

.demo-wendy-avatar,
.demo-queue-icon,
.demo-expired-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.demo-screen h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.demo-screen p {
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.demo-info {
    font-size: 0.95rem;
    padding: 1rem;
    background: var(--color-bg-light);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    margin: 1.5rem 0 !important;
}

/* Demo start button */
.demo-start-btn {
    padding: 0.9rem 2.5rem;
    font-size: 1.1rem;
    margin-top: 1rem;
    background-color: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.demo-start-btn:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
}

.demo-start-btn:active {
    transform: translateY(0);
}

.demo-stats-link {
    font-size: 0.85rem;
    margin-top: 1rem;
}

/* Ghost button for expired screen */
.btn-ghost {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent);
    background: transparent;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn-ghost:hover {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

/* Queue screen */
.demo-queue-position,
.demo-queue-eta {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--color-bg-light);
    border-radius: 10px;
    margin-bottom: 0.5rem;
}

.queue-label {
    color: var(--color-text-dim);
    font-size: 0.9rem;
}

.queue-value {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-accent-hover);
}

.demo-queue-progress {
    width: 100%;
    height: 4px;
    background: var(--color-bg-lighter);
    border-radius: 2px;
    margin: 1.5rem 0;
    overflow: hidden;
}

.queue-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    border-radius: 2px;
    width: 30%;
    animation: queuePulse 2s ease-in-out infinite;
}

@keyframes queuePulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.demo-queue-hint {
    font-size: 0.85rem !important;
    font-style: italic;
}

/* Session timer in chat header */
.demo-timer {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.8rem;
    background: var(--color-bg-lighter);
    border-radius: 8px;
    font-family: "SF Mono", "Cascadia Code", "Fira Code", monospace;
    font-size: 0.85rem;
    color: var(--color-text-dim);
    margin-left: var(--spacing-sm);
    border: 1px solid var(--color-border);
    flex-shrink: 0;
}

.timer-icon {
    font-size: 0.9rem;
}

.timer-value {
    font-weight: 600;
    min-width: 3.5em;
    font-variant-numeric: tabular-nums;
}

.timer-warning {
    animation: timerBlink 1s infinite;
    color: var(--color-affinity-negative) !important;
    border-color: var(--color-affinity-negative) !important;
}

@keyframes timerBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Session expired screen */
.demo-growth-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--color-bg-light);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.growth-stat {
    text-align: center;
}

.growth-stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-accent-hover);
}

.growth-stat-label {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.demo-grow-message {
    color: var(--color-affinity-friendly) !important;
    font-weight: 500;
    margin-top: 1rem !important;
}

/* ============================================================================
   Responsive — Tablet
   ============================================================================ */

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
        z-index: 100;
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .btn-menu {
        display: flex;
    }
    
    .affinity-display {
        min-width: 140px;
        max-width: 200px;
    }

    .demo-timer {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }
    
    .message-wrapper {
        max-width: 90%;
    }

    .demo-welcome-content,
    .demo-queue-content,
    .demo-expired-content {
        padding: 2rem 1.5rem;
    }

    .demo-growth-stats {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ============================================================================
   Responsive — Mobile
   ============================================================================ */

@media (max-width: 480px) {
    :root {
        --sidebar-width: 280px;
    }
    
    .chat-header {
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-sm);
    }
    
    .header-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .chat-title {
        font-size: 1rem;
    }
    
    .affinity-display {
        min-width: 100px;
        max-width: 140px;
    }
    
    .affinity-value {
        display: none;
    }
    
    .messages-container {
        padding: var(--spacing-md);
    }
    
    .message-wrapper {
        max-width: 92%;
    }
    
    .message-bubble {
        font-size: 0.9rem;
    }
    
    .input-area {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .modal {
        padding: var(--spacing-lg);
    }
}

/* ============================================================================
   Responsive — Very small screens
   ============================================================================ */

@media (max-width: 360px) {
    .header-info {
        gap: var(--spacing-sm);
    }
    
    .stage-label {
        display: none;
    }
    
    .affinity-display {
        min-width: 80px;
        max-width: 100px;
    }
}