/* Top Navigation Bar */
.top-nav {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1001;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    height: 60px;
    display: flex;
    align-items: center;
}

.nav-container {
    width: 100%;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    margin-right: 10px;
    z-index: 1002;
}

.hamburger-menu span {
    width: 25px;
    height: 3px;
    background-color: var(--header-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    cursor: pointer;
    flex: 1;
}

.nav-logo-icon {
    font-size: 28px;
}

.nav-logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--header-text);
}

.nav-logo-accent {
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    color: var(--header-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 12px;
    border-radius: 4px;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(30, 144, 255, 0.1);
}

.new-chat-btn-nav {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.new-chat-btn-nav:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 144, 255, 0.3);
}

.new-chat-btn-nav .icon {
    font-size: 16px;
    font-weight: bold;
}

.delete-chat-btn-nav {
    background-color: transparent;
    color: var(--header-text);
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.delete-chat-btn-nav:hover {
    background-color: rgba(255, 59, 48, 0.2);
    color: #ff3b30;
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-light);
    overflow: hidden;
    height: 100%;
}

/* Chat Header */
.chat-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.chat-header h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--header-text);
}

.header-actions {
    display: flex;
    gap: 10px;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background-color: transparent;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: var(--secondary-color);
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
}

/* Welcome Message */
.welcome-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-secondary);
}

.welcome-message h2 {
    font-size: 28px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.welcome-message p {
    font-size: 16px;
}

/* Message Styles */
.message {
    display: flex;
    margin-bottom: 12px;
    animation: slideIn 0.3s ease;
}

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

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

.message-content {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 12px;
    word-wrap: break-word;
    line-height: 1.5;
}

.message.user .message-content {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

/* Loading Indicator */
.message.loading .message-content {
    display: flex;
    gap: 4px;
    align-items: center;
}

.loading-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: bounce 1.4s infinite;
}

.loading-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes bounce {
    0%, 80%, 100% {
        opacity: 0.5;
        transform: translateY(0);
    }
    40% {
        opacity: 1;
        transform: translateY(-8px);
    }
}

/* Chat Input Area */
.chat-input-area {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-light);
    flex-shrink: 0;
}

.chat-form {
    width: 100%;
}

.input-wrapper {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.message-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    transition: var(--transition);
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.send-btn {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

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

/* Scrollbar Styling */
.messages-container::-webkit-scrollbar,
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.messages-container::-webkit-scrollbar-track,
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.messages-container::-webkit-scrollbar-thumb,
.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.messages-container::-webkit-scrollbar-thumb:hover,
.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Responsive */
/* Markdown Styling */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin: 12px 0 8px 0;
    font-weight: 600;
    line-height: 1.3;
}

.message-content h1 {
    font-size: 1.5em;
}

.message-content h2 {
    font-size: 1.3em;
}

.message-content h3 {
    font-size: 1.1em;
}

.message-content h4,
.message-content h5,
.message-content h6 {
    font-size: 1em;
}

.message-content p {
    margin: 8px 0;
}

.message-content ul,
.message-content ol {
    margin: 8px 0;
    padding-left: 24px;
}

.message-content li {
    margin: 4px 0;
}

.message-content code {
    background-color: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.message.assistant .message-content code {
    background-color: rgba(0, 0, 0, 0.15);
}

.message.user .message-content code {
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content pre {
    background-color: rgba(0, 0, 0, 0.1);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 8px 0;
}

.message.assistant .message-content pre {
    background-color: rgba(0, 0, 0, 0.15);
}

.message.user .message-content pre {
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.85em;
}

.message-content blockquote {
    border-left: 3px solid rgba(0, 0, 0, 0.2);
    padding-left: 12px;
    margin: 8px 0;
    font-style: italic;
    opacity: 0.8;
}

.message.assistant .message-content blockquote {
    border-left-color: rgba(0, 0, 0, 0.3);
}

.message.user .message-content blockquote {
    border-left-color: rgba(255, 255, 255, 0.3);
}

.message-content a {
    color: inherit;
    text-decoration: underline;
    opacity: 0.9;
}

.message-content a:hover {
    opacity: 1;
}

.message-content strong {
    font-weight: 600;
}

.message-content em {
    font-style: italic;
}

.message-content hr {
    border: none;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin: 12px 0;
}

.message.assistant .message-content hr {
    border-top-color: rgba(0, 0, 0, 0.15);
}

.message.user .message-content hr {
    border-top-color: rgba(255, 255, 255, 0.2);
}

.message-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 8px 0;
    font-size: 0.9em;
}

.message-content table th,
.message-content table td {
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 8px;
    text-align: left;
}

.message.assistant .message-content table th,
.message.assistant .message-content table td {
    border-color: rgba(0, 0, 0, 0.15);
}

.message.user .message-content table th,
.message.user .message-content table td {
    border-color: rgba(255, 255, 255, 0.2);
}

.message-content table th {
    font-weight: 600;
    background-color: rgba(0, 0, 0, 0.05);
}

.message.assistant .message-content table th {
    background-color: rgba(0, 0, 0, 0.1);
}

.message.user .message-content table th {
    background-color: rgba(255, 255, 255, 0.1);
}

@media (max-width: 768px) {
    .hamburger-menu {
        display: flex !important;
    }

    .message-content {
        max-width: 85%;
    }

    .chat-header {
        padding: 15px;
    }

    .messages-container {
        padding: 15px;
        padding-bottom: 20px;
    }

    .chat-input-area {
        padding: 15px;
        position: relative;
        bottom: 0;
        left: 0;
        right: 0;
    }

    .nav-actions {
        display: none;
    }
}

@media (max-width: 480px) {
    .nav-logo-text {
        font-size: 16px;
    }

    .nav-logo-icon {
        font-size: 24px;
    }

    .message-content {
        max-width: 90%;
        padding: 10px 12px;
        font-size: 14px;
    }

    .chat-header {
        padding: 12px 15px;
    }

    .chat-header h1 {
        font-size: 16px;
    }

    .messages-container {
        padding: 12px;
        padding-bottom: 15px;
        gap: 12px;
    }

    .chat-input-area {
        padding: 12px;
        position: relative;
        bottom: 0;
        left: 0;
        right: 0;
    }

    .message-input {
        padding: 10px 12px;
        font-size: 14px;
    }

    .send-btn {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .input-wrapper {
        gap: 8px;
    }
}