/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-tertiary: #0a0a0a;
    --bg-glass: rgba(255,255,255,0.03);
    --bg-glass-hover: rgba(255,255,255,0.08);
    --bg-glass-strong: rgba(255,255,255,0.05);
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #888888;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --accent-color: #ffffff;
    --accent-hover: #f0f0f0;
    --button-bg: #ffffff;
    --button-text: #000000;
    --button-hover: #f0f0f0;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.8);
    --shadow-light: 0 4px 16px rgba(0, 0, 0, 0.6);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.8);
    --shadow-heavy: 0 16px 48px rgba(0, 0, 0, 0.9);
    --blur-light: blur(8px);
    --blur-medium: blur(16px);
    --blur-heavy: blur(24px);
    --radius-small: 3px;
    --radius-medium: 6px;
    --radius-large: 10px;
    --radius-xl: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #000000;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

body::before {
    display: none;
}

/* App Layout */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* Top Bar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: var(--bg-glass);
    backdrop-filter: var(--blur-medium);
    -webkit-backdrop-filter: var(--blur-medium);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-glass);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
}

.topbar-left, .topbar-right {
    flex: 1;
    display: flex;
    align-items: center;
}

.topbar-right {
    justify-content: flex-end;
    gap: 12px; /* Add gap between new chat and account buttons */
}

.topbar-center {
    flex: 1;
    text-align: center;
}

.topbar-center h1 {
    font-family: 'Apple Garamond', 'Garamond', 'Times New Roman', serif;
    font-size: 1.75rem;
    font-weight: 400;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

.model-dropdown {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-medium);
    color: var(--button-text);
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
    box-shadow: 0 2.5px 18px 0 rgba(0,0,0, 0.3);
}

.model-dropdown:hover {
    background: var(--button-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.model-dropdown:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.new-chat-btn {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-medium);
    color: var(--button-text);
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2.5px 18px 0 rgba(0,0,0, 0.3);
}

.new-chat-btn:hover {
    background: var(--button-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.new-chat-btn i {
    width: 16px;
    height: 16px;
}

/* New Account Button */
.account-btn {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-medium);
    color: var(--button-text);
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2.5px 18px 0 rgba(0,0,0, 0.3);
}

.account-btn:hover {
    background: var(--button-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.account-btn i {
    width: 16px;
    height: 16px;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 24px;
    gap: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.welcome-screen h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 10px;
}

.welcome-screen p {
    font-size: 1.1rem;
    line-height: 1.5;
    margin-bottom: 10px;
}

.limit-info {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    width: 100%;
}

.suggestion-btn {
    background: var(--bg-glass-strong);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-medium);
    padding: 12px 20px;
    font-size: 0.95rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    flex: 1 1 calc(50% - 12px); /* Two columns on larger screens */
    max-width: 300px;
    text-align: center;
}

.suggestion-btn:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.account-actions {
    display: flex;
    gap: 12px;
    margin-top: 30px;
}

.account-actions .action-btn {
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 92px 0 140px 0;
    width: 100%;
}

.messages {
    max-width: 768px;
    margin: 0 auto;
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Message Bubbles */
.message {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    opacity: 0;
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message-bubble {
    background: var(--bg-glass);
    backdrop-filter: var(--blur-light);
    -webkit-backdrop-filter: var(--blur-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-large);
    padding: 20px 24px;
    max-width: 70%;
    box-shadow: var(--shadow-glass);
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column; /* Stack image and text vertically */
    gap: 12px; /* Space between components inside bubble */
}

.message-bubble:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.message.user .message-bubble {
    background: var(--button-bg);
    border-color: var(--button-bg);
    color: var(--button-text);
    flex-direction: column; /* Ensure user messages also stack vertically if they have images */
}

/* Enhanced Text Formatting */
.message-content {
    font-size: 0.95rem;
    line-height: 1.6;
    word-wrap: break-word;
    font-weight: 400;
}

.message-content p {
    margin-bottom: 16px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.message-content em {
    font-style: italic;
    color: var(--text-secondary);
}

.message-content del {
    text-decoration: line-through;
    color: var(--text-muted);
    opacity: 0.7;
}

.message-content a {
    color: #4ad991;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.message-content a:hover {
    border-bottom-color: #4ad991;
    color: #5de9a2;
}

.message-content img {
    max-width: 100%;
    max-height: 250px; /* Max height for images within messages */
    height: auto; /* Ensure aspect ratio is maintained */
    border-radius: var(--radius-medium);
    margin-bottom: 12px; /* Space between image and text */
    object-fit: contain;
}

/* Code Blocks */
.code-block {
    background: var(--bg-tertiary);
    border: 1.5px solid var(--border-color);
    box-shadow: 0 1px 7px 0 rgba(30,32,43, 0.12);
    margin: 14px 0;
    font-family: 'Source Code Pro', 'JetBrains Mono', Monaco, 'Courier New', monospace;
    font-size: 0.93rem;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.code-header {
    background: var(--bg-glass-hover);
    border-radius: 0;
    border-bottom: 1px solid var(--border-color);
    padding: 9px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.code-language {
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
}

.code-actions {
    display: flex;
    gap: 2px;
}

.code-action-btn {
    background: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--border-color);
    font-weight: 500;
    border-radius: 3px;
    cursor: pointer;
    padding: 6px 12px;
    font-size: 0.81em;
    transition: all 0.18s;
    display: flex;
    align-items: center;
    gap: 4px;
}

.code-action-btn:hover {
    background: var(--button-hover);
    color: var(--button-text);
}

.code-action-btn i {
    width: 15px;
    height: 15px;
}

.code-content {
    background: transparent;
    padding: 14px 18px;
    font-family: 'Source Code Pro', 'JetBrains Mono', Monaco, 'Courier New', monospace;
    font-size: 0.99em;
    line-height: 1.60;
    color: #fff;
    overflow-x: auto;
    white-space: pre;
}

/* Inline Code */
.inline-code {
    background: var(--bg-glass-hover);
    border: 1px solid var(--border-hover);
    border-radius: 3px;
    padding: 2px 6px;
    font-family: 'Source Code Pro', monospace;
    font-size: 0.93em;
    color: #fae088;
}

/* Message Actions */
.message-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

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

.message.user .message-actions {
    display: none;
}

.action-btn {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    color: var(--button-text);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-small);
    transition: all 0.3s ease;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    background: var(--button-hover);
    border-color: var(--border-hover);
    color: var(--button-text);
    transform: translateY(-1px);
}

.action-btn i {
    width: 16px;
    height: 16px;
}

/* Input Container */
.input-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: var(--blur-heavy);
    -webkit-backdrop-filter: var(--blur-heavy);
    border-top: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: var(--shadow-glass);
    display: flex; /* Make it a flex container */
    flex-direction: column; /* Stack items vertically */
    align-items: center; /* Center horizontally */
    gap: 16px; /* Space between preview and input wrapper */
}

.input-wrapper {
    max-width: 768px;
    margin: 0 auto;
    display: flex;
    align-items: flex-end;
    gap: 16px;
    background: var(--bg-glass-strong);
    backdrop-filter: var(--blur-medium);
    -webkit-backdrop-filter: var(--blur-medium);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 16px 20px;
    box-shadow: var(--shadow-glass);
    transition: all 0.3s ease;
    width: 100%; /* Take full width within container */
}

.input-wrapper:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1), var(--shadow-glass);
    transform: translateY(-2px);
}

.message-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: none;
    outline: none;
    min-height: 24px;
    max-height: 120px;
    overflow-y: auto;
    font-family: inherit;
    font-weight: 400;
}

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

.send-btn {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--button-text);
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
    box-shadow: 0 2.5px 18px 0 rgba(0,0,0, 0.3);
}

.send-btn:hover {
    background: var(--button-hover);
    transform: scale(1.05) translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.send-btn:disabled {
    background: var(--bg-glass);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.send-btn i {
    width: 18px;
    height: 18px;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg-glass);
    border-radius: 4px;
    backdrop-filter: var(--blur-light);
    -webkit-backdrop-filter: var(--blur-light);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-glass-hover);
}

/* Enhanced Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Loading Animation */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 16px 0;
}

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

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0s; }

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.3;
    }
    40% {
        transform: scale(1.2);
        opacity: 1;
    }
}

/* PrismJS syntax highlight colors: a minimal custom theme on dark */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
    color: #7f849c;
    font-style: italic;
}
.token.punctuation {
    color: #a6accd;
}
.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol {
    color: #34bae4;
}
.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
    color: #4ad991;
}
.token.operator,
.token.entity,
.token.url,
.token.variable {
    color: #e0b989;
}
.token.atrule,
.token.attr-value,
.token.keyword {
    color: #ff6584;
}
.token.function,
.token.class-name {
    color: #ffe07a;
}
.token.regex,
.token.important {
    color: #42c6ff;
}
.token.deleted {
    color: #ff4c6e;
}
.token.bold {
    font-weight: bold;
}
.token.italic {
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .topbar {
        padding: 16px 20px;
        height: 64px;
    }
    
    .topbar-center h1 {
        font-size: 1.5rem;
    }
    
    .new-chat-btn span {
        display: none;
    }
    
    .new-chat-btn {
        padding: 10px 12px;
    }
    
    .messages {
        padding: 24px 20px;
        gap: 16px;
    }
    
    .message-bubble {
        max-width: 85%;
        padding: 16px 20px;
    }
    
    .input-container {
        padding: 20px;
    }
    
    .input-wrapper {
        border-radius: var(--radius-medium);
        padding: 14px 16px;
    }
    
    .send-btn {
        width: 36px;
        height: 36px;
    }
    
    .chat-container {
        padding: 84px 0 120px 0;
    }

    .topbar-right {
        gap: 8px;
    }

    .account-btn {
        padding: 10px 12px;
    }

    .account-btn span {
        display: none;
    }
    
    .welcome-screen {
        padding: 40px 20px;
    }

    .welcome-screen h2 {
        font-size: 2rem;
    }

    .welcome-screen p {
        font-size: 1rem;
    }

    .suggestions {
        flex-direction: column;
        align-items: stretch;
    }

    .suggestion-btn {
        flex-basis: auto;
        max-width: none;
    }

    .account-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 480px) {
    .topbar-left, .topbar-right {
        flex: 0 0 auto;
    }
    
    .topbar-center {
        flex: 1;
        margin: 0 16px;
    }
    
    .topbar-center h1 {
        font-size: 1.25rem;
    }
    
    .model-dropdown {
        padding: 8px 12px;
        font-size: 0.8rem;
    }
    
    .new-chat-btn {
        padding: 8px 10px;
    }
    
    .message-bubble {
        max-width: 90%;
        padding: 14px 16px;
    }
    
    .messages {
        padding: 20px 16px;
        gap: 14px;
    }
    
    .input-container {
        padding: 16px;
    }
    
    .code-content {
        font-size: 0.8rem;
        padding: 16px;
    }

    .topbar-right {
        gap: 6px;
    }

    .account-btn {
        padding: 8px 10px;
    }
}