/* Grok 3 AI Chat - Professional Design System */

:root {
    /* Color Palette - WCAG AAA Compliant */
    --primary-color: #1DA1F2;
    --primary-hover: #1A8CD8;
    --primary-light: #E8F5FD;
    --primary-dark: #0C7ABF;
    
    --secondary-color: #657786;
    --secondary-light: #AAB8C2;
    --secondary-dark: #2C3E50;
    
    --success-color: #1DB954;
    --warning-color: #FFA500;
    --danger-color: #E0245E;
    
    /* Base Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7F9FA;
    --bg-tertiary: #EDF0F2;
    
    --text-primary: #14171A;
    --text-secondary: #536471;
    --text-tertiary: #8B98A5;
    --text-inverse: #FFFFFF;
    
    --border-color: #E1E8ED;
    --border-light: #F0F3F4;
    --border-hover: #CBD2D9;
    
    /* Shadows & Effects */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    
    --glow-primary: 0 0 0 3px rgba(29, 161, 242, 0.2);
    --glow-success: 0 0 0 3px rgba(29, 185, 84, 0.2);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
    --font-mono: "SF Mono", "Monaco", "Inconsolata", "Fira Code", "Fira Mono", "Droid Sans Mono", "Courier New", monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-base: 1;
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-modal: 30;
    --z-tooltip: 40;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #16181C;
    --bg-tertiary: #1E2124;
    
    --text-primary: #FFFFFF;
    --text-secondary: #9CA3AF;
    --text-tertiary: #6B7280;
    
    --border-color: #2F3336;
    --border-light: #202327;
    --border-hover: #3C4043;
    
    --primary-light: #031621;
    
    --shadow-xs: 0 1px 2px rgba(255, 255, 255, 0.05);
    --shadow-sm: 0 2px 4px rgba(255, 255, 255, 0.08);
    --shadow-md: 0 4px 12px rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 8px 24px rgba(255, 255, 255, 0.12);
}

/* Auto Theme (System Preference) */
@media (prefers-color-scheme: dark) {
    [data-theme="auto"] {
        --bg-primary: #000000;
        --bg-secondary: #16181C;
        --bg-tertiary: #1E2124;
        
        --text-primary: #FFFFFF;
        --text-secondary: #9CA3AF;
        --text-tertiary: #6B7280;
        
        --border-color: #2F3336;
        --border-light: #202327;
        --border-hover: #3C4043;
        
        --primary-light: #031621;
        
        --shadow-xs: 0 1px 2px rgba(255, 255, 255, 0.05);
        --shadow-sm: 0 2px 4px rgba(255, 255, 255, 0.08);
        --shadow-md: 0 4px 12px rgba(255, 255, 255, 0.1);
        --shadow-lg: 0 8px 24px rgba(255, 255, 255, 0.12);
    }
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility Helper */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Main Container */
.grok-container {
    display: flex;
    flex-direction: column;
    height: 90vh;
    max-height: 900px;
    max-width: 1200px;
    margin: 2rem auto;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

/* Header */
.grok-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.grok-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.grok-brand svg {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.grok-brand:hover svg {
    transform: scale(1.1);
}

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

#grok-model {
    appearance: none;
    padding: var(--space-sm) var(--space-lg);
    padding-right: 2.5rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 160px;
}

#grok-model:hover {
    border-color: var(--primary-color);
}

#grok-model:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.model-selector::after {
    content: '';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--text-secondary);
    pointer-events: none;
}

/* Messages Container */
.grok-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
    background: var(--bg-secondary);
    scroll-behavior: smooth;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    animation: fadeIn var(--transition-slow);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    opacity: 0.8;
}

.empty-state-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.empty-state-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: var(--space-xl);
}

/* Quick Prompts */
.quick-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-lg);
}

.quick-prompt {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.quick-prompt:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-prompt:focus {
    outline: none;
    box-shadow: var(--glow-primary);
}

/* Messages */
.message {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    animation: messageSlide var(--transition-base) ease-out;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-inverse);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, #1DB954, #169C46);
    color: var(--text-inverse);
}

.message-content {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
    max-width: 85%;
}

.message.user .message-content {
    background: var(--primary-light);
    margin-left: auto;
}

/* Message Actions */
.message-actions {
    display: flex;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.message-action-btn {
    padding: var(--space-xs) var(--space-sm);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.message-action-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.typing-dots {
    display: flex;
    gap: 4px;
    padding: var(--space-md);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

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

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

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

@keyframes typingPulse {
    0%, 60%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    30% {
        transform: scale(1.2);
        opacity: 1;
    }
}

/* Input Area */
.grok-input {
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: flex-end;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-fast);
    overflow: hidden;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

#grok-prompt {
    flex: 1;
    min-height: 52px;
    max-height: 200px;
    padding: var(--space-md) var(--space-lg);
    padding-right: 60px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    outline: none;
    line-height: 1.5;
}

#grok-prompt::placeholder {
    color: var(--text-tertiary);
}

#grok-submit {
    position: absolute;
    right: 8px;
    bottom: 8px;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-inverse);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

#grok-submit:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: scale(1.05);
}

#grok-submit:active:not(:disabled) {
    transform: scale(0.95);
}

#grok-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#grok-submit svg {
    width: 20px;
    height: 20px;
}

/* Reset Button */
.grok-reset {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.grok-reset:hover {
    color: var(--danger-color);
    border-color: var(--danger-color);
    background: rgba(224, 36, 94, 0.1);
}

.grok-reset svg {
    width: 16px;
    height: 16px;
}

/* Scrollbar Styling */
.grok-messages::-webkit-scrollbar {
    width: 8px;
}

.grok-messages::-webkit-scrollbar-track {
    background: transparent;
}

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

.grok-messages::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Code Blocks */
.message-content pre {
    margin: var(--space-md) 0;
    padding: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.message-content code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.message-content :not(pre) > code {
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--primary-color);
    font-size: 0.875em;
}

.message-content pre > code {
    display: block;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    overflow-x: auto;
    line-height: 1.5;
}

/* Tables */
.message-content table {
    width: 100%;
    margin: var(--space-md) 0;
    border-collapse: collapse;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.message-content th,
.message-content td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.message-content th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.message-content tr:last-child td {
    border-bottom: none;
}

/* Links */
.message-content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.message-content a:hover {
    text-decoration: underline;
}

/* Blockquotes */
.message-content blockquote {
    margin: var(--space-md) 0;
    padding-left: var(--space-lg);
    border-left: 4px solid var(--primary-color);
    color: var(--text-secondary);
}

/* Lists */
.message-content ul,
.message-content ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-xl);
}

.message-content li {
    margin: var(--space-xs) 0;
}

/* Headings */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin: var(--space-lg) 0 var(--space-md) 0;
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-primary);
}

.message-content h1 { font-size: 2rem; }
.message-content h2 { font-size: 1.5rem; }
.message-content h3 { font-size: 1.25rem; }
.message-content h4 { font-size: 1.125rem; }
.message-content h5 { font-size: 1rem; }
.message-content h6 { font-size: 0.875rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .grok-container {
        height: 100vh;
        max-height: none;
        margin: 0;
        border-radius: 0;
        border: none;
    }
    
    .grok-header {
        padding: var(--space-md) var(--space-lg);
    }
    
    .grok-brand {
        font-size: 1.125rem;
    }
    
    .grok-brand svg {
        width: 24px;
        height: 24px;
    }
    
    #grok-model {
        min-width: 120px;
        font-size: 0.8125rem;
    }
    
    .grok-messages {
        padding: var(--space-lg);
    }
    
    .message-content {
        max-width: 90%;
    }
    
    .empty-state-title {
        font-size: 1.5rem;
    }
    
    .empty-state-text {
        font-size: 1rem;
    }
    
    .quick-prompts {
        padding: 0 var(--space-md);
    }
    
    .grok-input {
        padding: var(--space-md) var(--space-lg);
    }
}

@media (max-width: 480px) {
    .grok-header {
        padding: var(--space-sm) var(--space-md);
    }
    
    .grok-brand span {
        display: none;
    }
    
    .grok-messages {
        padding: var(--space-md);
    }
    
    .message {
        gap: var(--space-sm);
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
    
    .message-content {
        padding: var(--space-sm) var(--space-md);
        max-width: 95%;
    }
    
    .grok-input {
        padding: var(--space-sm) var(--space-md);
    }
    
    #grok-prompt {
        padding: var(--space-sm) var(--space-md);
        padding-right: 50px;
        min-height: 44px;
        font-size: 0.9375rem;
    }
    
    #grok-submit {
        width: 36px;
        height: 36px;
        right: 6px;
        bottom: 6px;
    }
}

/* RTL Support */
[dir="rtl"] {
    .message.user .message-content {
        margin-right: auto;
        margin-left: 0;
    }
    
    .message-actions {
        flex-direction: row-reverse;
    }
    
    #grok-prompt {
        padding: var(--space-md) 60px var(--space-md) var(--space-lg);
    }
    
    #grok-submit {
        right: auto;
        left: 8px;
    }
    
    .model-selector::after {
        right: auto;
        left: 12px;
    }
    
    #grok-model {
        padding-right: var(--space-lg);
        padding-left: 2.5rem;
    }
    
    .message-content blockquote {
        padding-left: 0;
        padding-right: var(--space-lg);
        border-left: none;
        border-right: 4px solid var(--primary-color);
    }
    
    .message-content ul,
    .message-content ol {
        padding-left: 0;
        padding-right: var(--space-xl);
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Focus Visible */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .grok-header,
    .grok-input,
    .message-actions,
    .grok-reset {
        display: none;
    }
    
    .grok-container {
        height: auto;
        max-height: none;
        box-shadow: none;
        border: none;
    }
    
    .grok-messages {
        padding: 0;
        background: white;
    }
    
    .message-content {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}