:root {
    --primary-color: #1a237e;
    --primary-light: #534bae;
    --primary-dark: #000051;
    --secondary-color: #2962ff;
    --accent-color: #00b0ff;
    --background-color: #f5f5f5;
    --chat-bg: #ffffff;
    --text-color: #263238;
    --text-light: #ffffff;
    --message-user-bg: #2962ff;
    --message-bot-bg: #f5f5f5;
    --error-color: #ff1744;
    --success-color: #00c853;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
}

.container {
    display: flex;
    height: 100vh;
    position: relative;
}

/* Sidebar Styles */
.sidebar {
    width: 340px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-light);
    padding: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
}

.sidebar-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 8px;
}

.logo i {
    font-size: 28px;
    color: var(--accent-color);
}

.subtitle {
    font-size: 14px;
    opacity: 0.8;
}

.upload-section {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.upload-section h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    margin-bottom: 15px;
}

.upload-box {
    border: 2px dashed rgba(255, 255, 255, 0.3);
    padding: 30px;
    text-align: center;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.05);
}

.upload-box:hover {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
}

.upload-icon {
    position: relative;
    display: inline-block;
    margin-bottom: 15px;
}

.upload-icon i {
    font-size: 48px;
    color: var(--accent-color);
    z-index: 2;
    position: relative;
}

.upload-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(0, 176, 255, 0.2);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0.5;
    }
    70% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.2;
    }
    100% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0.5;
    }
}

.upload-text {
    font-size: 16px;
    margin-bottom: 8px;
}

.upload-divider {
    font-size: 14px;
    opacity: 0.7;
    margin: 10px 0;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background-color: var(--accent-color);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.upload-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.file-list-container {
    max-height: 200px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 10px;
}

.uploaded-files ul {
    list-style: none;
}

.uploaded-files li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    margin-bottom: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.uploaded-files li:hover {
    background: rgba(255, 255, 255, 0.15);
}

.uploaded-files li i.fa-times {
    margin-left: auto;
    cursor: pointer;
    opacity: 0.7;
    transition: all 0.3s ease;
}

.uploaded-files li i.fa-times:hover {
    opacity: 1;
    color: var(--error-color);
}

.sidebar-footer {
    margin-top: 30px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-stack {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 10px;
}

.tech-stack i {
    font-size: 20px;
    opacity: 0.7;
    transition: all 0.3s ease;
}

.tech-stack i:hover {
    opacity: 1;
    color: var(--accent-color);
}

/* Main Content Styles */
.main-content {
    margin-left: 340px;
    width: calc(100% - 340px);
    height: 100vh;
    background-color: var(--chat-bg);
    position: relative;
}

.chat-header {
    padding: 20px 30px;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-content {
    text-align: center;
}

.header-content h1 {
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 5px;
}

.header-content p {
    color: var(--text-color);
    opacity: 0.7;
}

.chat-container {
    flex-grow: 1;
    padding: 30px;
    overflow-y: auto;
    background: linear-gradient(135deg, #f5f5f5 0%, #ffffff 100%);
}

.welcome-message {
    text-align: center;
    margin: 20px auto;
    max-width: 900px;
    padding: 40px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.welcome-header {
    margin-bottom: 30px;
}

.welcome-header h1 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-header p {
    font-size: 18px;
    color: var(--text-color);
    opacity: 0.8;
}

.welcome-icon {
    font-size: 48px;
    color: var(--accent-color);
    margin: 30px 0;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.feature {
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    padding: 25px;
    border-radius: 15px;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    border-color: var(--accent-color);
}

.feature i {
    font-size: 28px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.feature span {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.feature p {
    font-size: 14px;
    color: var(--text-color);
    opacity: 0.7;
    line-height: 1.4;
}

.chat-messages {
    display: flex;
    flex-grow: 1;
    overflow-y: auto;
    flex-direction: column;
    gap: 20px;
}

.message {
    max-width: 70%;
    padding: 15px 20px;
    border-radius: 15px;
    position: relative;
    animation: messageAppear 0.3s ease;
}

/* Message Animation */
@keyframes messageAppear {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* User and Bot Messages */
.message.user {
    background-color: var(--message-user-bg);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 10px;
    border-top-left-radius: 10px;
    padding: 10px 15px;
    max-width: 75%;
    word-wrap: break-word;
    white-space: pre-wrap; /* Ensures messages break into the next line */
    animation: messageAppear 0.3s ease-out;
}

.message.bot {
    background-color: var(--message-bot-bg);
    color: var(--text-color);
    align-self: flex-start;
    border-bottom-left-radius: 10px;
    border-top-right-radius: 10px;
    padding: 10px 15px;
    max-width: 75%;
    word-wrap: break-word;
    white-space: pre-wrap; /* Ensures messages break into the next line */
    animation: messageAppear 0.3s ease-out;
}

/* Chat Input Container - Full Width */
.chat-input-container {
    position: fixed;
    bottom: 0;  /* Extends fully to the left */
    width: 80%;  /* Full width till end of the page */
    background: #fff;
    padding: 12px 15px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Input Box - Full Width */
.input-wrapper {
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    border: 1px solid #ccc;
    border-radius: 25px;
    background: var(--background-color);
    padding: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Input Field - Full Width, Text Align Left */
#userInput {
    flex-grow: 1;
    padding: 12px 15px;
    border: none;
    background: transparent;
    outline: none;
    font-size: 16px;
    text-align: left;
    resize: none;  /* Prevents manual resizing by user */
    overflow-y: auto;  /* Enables vertical scrolling */
    min-height: 20px;  /* Minimum height */
    max-height: 150px;  /* Limits expansion */
    line-height: 1.5;  /* Better readability */
}


/* Send Button - Aligned to the Right */
#sendButton {
    background: #007bff;
    color: white;
    border: none;
    padding: 12px 15px;
    cursor: pointer;
    border-radius: 50%;
    transition: 0.3s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

#sendButton:hover {
    background-color: var(--primary-light);
    transform: scale(1.1);
}


/* Loading Animation */
.loading {
    display: flex;
    gap: 8px;
    padding: 15px 20px;
    background: var(--message-bot-bg);
    border-radius: 15px;
    align-self: flex-start;
}

.loading span {
    width: 10px;
    height: 10px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    animation: bounce 0.5s alternate infinite;
}

.loading span:nth-child(2) { animation-delay: 0.16s; }
.loading span:nth-child(3) { animation-delay: 0.32s; }

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-10px); }
}

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

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Main Header Styles */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.header-left, .header-right {
    flex: 1;
}

.header-left .logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-left .logo i {
    font-size: 24px;
    color: var(--accent-color);
}

.header-left .logo span {
    font-size: 20px;
    font-weight: 600;
}

.header-center {
    text-align: center;
}

.header-center h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 6px;
    background: linear-gradient(to right, #ffffff, #e3f2fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-center p {
    font-size: 16px;
    opacity: 0.9;
}

.header-right {
    display: flex;
    justify-content: flex-end;
}

.header-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
}

.theme-toggle, .help-button {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--text-light);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover, .help-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Add responsive styles */
@media (max-width: 1024px) {
    .feature-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 280px;
    }

    .main-content {
        margin-left: 280px;
        width: calc(100% - 280px);
    }

    .welcome-header h1 {
        font-size: 28px;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header-center h1 {
        font-size: 20px;
    }
}