:root {
    /* Light Mode - Cyberpunk Neon */
    --primary-color: #00ffff;
    --background-color: #0a0a0f;
    --chat-background: #1a1a2e;
    --text-color: #00ffff;
    --message-user-bg: linear-gradient(135deg, #00ffff 0%, #ff00ff 100%);
    --message-bot-bg: #16213e;
    --border-color: #00ffff;
    --quick-button-bg: linear-gradient(135deg, #ff00ff 0%, #00ffff 100%);
    --shadow-glow: 0 0 20px rgba(0, 255, 255, 0.5);
}

[data-theme="light"] {
    /* Light Mode - Cyberpunk Bright */
    --primary-color: #ff00ff;
    --background-color: #f0f0ff;
    --chat-background: #ffffff;
    --text-color: #1a1a2e;
    --message-user-bg: linear-gradient(135deg, #ff00ff 0%, #00ffff 100%);
    --message-bot-bg: #e8e8ff;
    --border-color: #ff00ff;
    --quick-button-bg: linear-gradient(135deg, #00ffff 0%, #ff00ff 100%);
    --shadow-glow: 0 0 20px rgba(255, 0, 255, 0.5);
}

[data-theme="dark"] {
    /* Dark Mode - Cyberpunk Neon */
    --primary-color: #00ffff;
    --background-color: #0a0a0f;
    --chat-background: #1a1a2e;
    --text-color: #00ffff;
    --message-user-bg: linear-gradient(135deg, #00ffff 0%, #ff00ff 100%);
    --message-bot-bg: #16213e;
    --border-color: #00ffff;
    --quick-button-bg: linear-gradient(135deg, #ff00ff 0%, #00ffff 100%);
    --shadow-glow: 0 0 20px rgba(0, 255, 255, 0.5);
}

body {
    font-family: Arial, sans-serif;
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    min-height: 100vh;
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    /* Performance optimizations */
    will-change: background-color, color;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.chat-container {
    width: 100%;
    max-width: 800px;
    background: var(--chat-background);
    border-radius: 10px;
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.2),
        var(--shadow-glow),
        0 0 40px rgba(0, 255, 255, 0.3);
    border: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    margin: 20px auto;
    height: 80vh;
}

.chat-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff00ff 100%);
    color: #000;
    padding: 15px;
    font-size: 18px;
    text-align: center;
    font-weight: bold;
    border-radius: 10px 10px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.8);
    box-shadow: 0 2px 10px rgba(0, 255, 255, 0.3);
}

[data-theme="light"] .chat-header {
    color: #fff;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.chat-box {
    flex-grow: 1;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
    /* Performance optimizations */
    contain: layout style paint;
    will-change: scroll-position;
}

.message {
    padding: 10px 15px;
    border-radius: 15px;
    margin-bottom: 10px;
    max-width: 80%;
    word-wrap: break-word;
    line-height: 1.6;
    /* Performance optimizations */
    contain: layout style;
    transform: translateZ(0); /* Force GPU acceleration */
}

.message p {
    margin: 8px 0;
    line-height: 1.6;
}

.message p:first-child {
    margin-top: 0;
}

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

.message strong {
    font-weight: bold;
    color: var(--primary-color);
}

.message a {
    color: var(--primary-color);
    text-decoration: underline;
}

.message a:hover {
    opacity: 0.8;
}

.user-message {
    background: var(--message-user-bg);
    color: #000;
    align-self: flex-end;
    border: 1px solid var(--border-color);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    font-weight: 500;
}

[data-theme="light"] .user-message {
    color: #fff;
}

.bot-message {
    background: var(--message-bot-bg);
    color: var(--text-color);
    align-self: flex-start;
    border: 1px solid var(--border-color);
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.2);
}

.input-container {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-row {
    display: flex;
    gap: 10px;
}

.message-input {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    background: var(--chat-background);
    color: var(--text-color);
    box-shadow: inset 0 0 10px rgba(0, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.message-input:focus {
    outline: none;
    border-color: #ff00ff;
    box-shadow: 
        inset 0 0 10px rgba(0, 255, 255, 0.2),
        0 0 15px rgba(255, 0, 255, 0.3);
}

.file-upload {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload-label {
    background: var(--message-bot-bg);
    color: var(--text-color);
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s ease;
}

.file-upload-label:hover {
    opacity: 0.9;
}

.file-help {
    max-width: 100%;
    word-wrap: break-word;
}

.send-button {
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff00ff 100%);
    color: #000;
    border: 2px solid var(--border-color);
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.4);
    transition: all 0.3s ease;
}

[data-theme="light"] .send-button {
    color: #fff;
}

.send-button:hover {
    transform: scale(1.05);
    box-shadow: 
        0 0 25px rgba(0, 255, 255, 0.6),
        0 0 35px rgba(255, 0, 255, 0.4);
}

.quick-buttons {
    padding: 10px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 5px;
    border-top: 1px solid var(--border-color);
}

.quick-button {
    background: var(--quick-button-bg);
    color: #000;
    border: 2px solid var(--border-color);
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

[data-theme="light"] .quick-button {
    color: #fff;
}

.quick-button:hover {
    transform: scale(1.05);
    box-shadow: 
        0 0 20px rgba(0, 255, 255, 0.6),
        0 0 30px rgba(255, 0, 255, 0.4);
}

.uploaded-file {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--message-bot-bg);
    border-radius: 5px;
    margin-top: 5px;
    font-size: 14px;
    max-width: 100%;
    word-break: break-word;
}

.uploaded-file span {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.remove-file {
    color: #ff4444;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 18px;
}

.theme-toggle {
    background: linear-gradient(135deg, #00ffff 0%, #ff00ff 100%);
    border: 2px solid #00ffff;
    color: #000;
    cursor: pointer;
    font-size: 18px;
    padding: 8px 12px;
    border-radius: 4px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 
        0 0 10px #00ffff,
        inset 0 0 10px rgba(255, 0, 255, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.theme-toggle:hover::before {
    left: 100%;
}

.theme-toggle:hover {
    box-shadow: 
        0 0 20px #00ffff,
        0 0 30px #ff00ff,
        inset 0 0 15px rgba(255, 0, 255, 0.5);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

[data-theme="dark"] .theme-toggle {
    background: linear-gradient(135deg, #ff00ff 0%, #00ffff 100%);
    border-color: #ff00ff;
    color: #fff;
    box-shadow: 
        0 0 10px #ff00ff,
        inset 0 0 10px rgba(0, 255, 255, 0.3);
}

[data-theme="dark"] .theme-toggle:hover {
    box-shadow: 
        0 0 20px #ff00ff,
        0 0 30px #00ffff,
        inset 0 0 15px rgba(0, 255, 255, 0.5);
}

.footer {
    text-align: center;
    padding: 10px;
    font-size: 12px;
    color: var(--text-color);
    opacity: 0.7;
    border-top: 1px solid var(--border-color);
    background: var(--chat-background);
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.policy-notice {
    max-width: 800px;
    width: 100%;
    margin: 20px auto;
    background: var(--chat-background);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
    text-align: left;
    overflow: hidden;
}

.policy-header {
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff00ff 100%);
    color: #000;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 14px;
    transition: all 0.3s ease;
}

[data-theme="light"] .policy-header {
    color: #fff;
}

.policy-header:hover {
    opacity: 0.9;
}

.policy-toggle {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.policy-notice.collapsed .policy-toggle {
    transform: rotate(-90deg);
}

.policy-content {
    padding: 15px 20px;
    font-size: 12px;
    color: var(--text-color);
    opacity: 0.8;
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.policy-notice.collapsed .policy-content {
    max-height: 0;
    padding: 0 20px;
}

.policy-notice h3 {
    margin: 0;
    font-size: 14px;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.policy-notice p {
    margin: 8px 0;
    line-height: 1.5;
}

.policy-notice strong {
    color: var(--primary-color);
}

.policy-notice ul {
    margin: 8px 0;
    padding-left: 20px;
}

.policy-notice li {
    margin: 5px 0;
    line-height: 1.5;
}

/* Instruction Cards */
.instruction-card {
    background: var(--message-bot-bg);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 15px 20px;
    margin: 10px 0;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.instruction-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), #ff00ff);
}

.instruction-card h3,
.instruction-card h4 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.instruction-card h4 {
    font-size: 14px;
    margin-top: 15px;
    margin-bottom: 8px;
}

.instruction-card ol,
.instruction-card ul {
    margin: 10px 0;
    padding-left: 25px;
}

.instruction-card li {
    margin: 8px 0;
    line-height: 1.6;
}

.instruction-card code {
    background: rgba(0, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.instruction-card pre {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 12px;
    overflow-x: auto;
    margin: 10px 0;
}

.instruction-card pre code {
    background: none;
    padding: 0;
    border: none;
    color: var(--text-color);
}

.instruction-card strong {
    color: var(--primary-color);
}

[data-theme="light"] .instruction-card {
    background: var(--message-bot-bg);
}

[data-theme="light"] .instruction-card pre {
    background: rgba(0, 0, 0, 0.05);
}