* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #343541;
    --bg-secondary: #202123;
    --bg-tertiary: #40414f;
    --text-primary: #ececf1;
    --text-secondary: #8e8ea0;
    --border-color: #565869;
    --accent-color: #10a37f;
    --accent-hover: #0d8c6f;
    --message-user-bg: #343541;
    --message-bot-bg: #444654;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.navbar {
    display: none; /* Ascundem navbar-ul pentru design ChatGPT */
}

.main-content {
    margin: 0;
    padding: 0;
    max-width: 100%;
    height: 100vh;
}

/* Chat Layout */
.chat-layout {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
}

.sidebar-header {
    padding: 8px;
}

.new-chat-btn {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    transition: background 0.2s;
}

.new-chat-btn:hover {
    background: var(--bg-tertiary);
}

.new-chat-btn .icon {
    font-size: 18px;
    font-weight: bold;
}

.sidebar-actions {
    flex: 1;
    padding: 8px;
    overflow-y: auto;
}

.sidebar-action {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    text-decoration: none;
    margin-bottom: 4px;
    transition: background 0.2s;
    text-align: left;
}

.sidebar-action:hover {
    background: var(--bg-tertiary);
}

.sidebar-action .icon {
    font-size: 16px;
}

.pdf-info {
    padding: 8px;
    border-top: 1px solid var(--border-color);
}

.pdf-count-badge {
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.pdf-count-badge .icon {
    font-size: 16px;
}

/* Main Chat Area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background: var(--bg-primary);
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

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

/* Welcome Message */
.welcome-message {
    max-width: 768px;
    margin: 0 auto;
    padding: 60px 20px;
    text-align: center;
}

.welcome-message h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.welcome-message p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 8px;
}

.pdf-info-text {
    margin-top: 16px;
}

.pdf-info-text strong {
    color: var(--accent-color);
}

/* Messages */
.message {
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
    animation: fadeIn 0.3s;
}

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

.message-container {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 24px;
}

.message-avatar {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-message .message-avatar {
    background: var(--accent-color);
    color: white;
}

.bot-message .message-avatar {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.message-content {
    flex: 1;
    padding-top: 4px;
    line-height: 1.75;
    font-size: 16px;
    color: var(--text-primary);
}

.message-content p {
    margin-bottom: 12px;
}

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

.message-content code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.message-content pre {
    background: var(--bg-tertiary);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
}

.message-content pre code {
    background: transparent;
    padding: 0;
}

/* Chat Input */
.chat-input-wrapper {
    padding: 24px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.chat-form {
    max-width: 768px;
    margin: 0 auto;
}

.input-container {
    position: relative;
    display: flex;
    align-items: flex-end;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 12px 16px;
    transition: border-color 0.2s;
}

.input-container:focus-within {
    border-color: var(--accent-color);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.5;
    padding-right: 12px;
}

.chat-input::placeholder {
    color: var(--text-secondary);
}

.send-button {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
    padding: 0;
}

.send-button:hover:not(:disabled) {
    background: var(--accent-hover);
}

.send-button:disabled {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.input-footer {
    text-align: center;
    margin-top: 12px;
}

.input-footer p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Loading Animation */
.loading-dots {
    display: inline-flex;
    gap: 4px;
    padding: 4px 0;
}

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

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

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

@keyframes loadingDot {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    30% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .welcome-message {
        padding: 40px 20px;
    }
    
    .welcome-message h1 {
        font-size: 24px;
    }
}

/* Config and Upload Pages */
.config-container,
.upload-container {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 32px;
    max-width: 900px;
    margin: 40px auto;
    border: 1px solid var(--border-color);
}

.config-container h2,
.upload-container h2 {
    color: var(--text-primary);
    margin-bottom: 24px;
    font-size: 24px;
}

/* Config Tabs */
.config-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    top: 2px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
    background: var(--bg-tertiary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s;
}

.tab-content h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 20px;
}

.config-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 14px;
}

.config-footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.config-form,
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.form-input {
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
    width: 100%;
    font-family: inherit;
}

.form-input:focus {
    border-color: var(--accent-color);
}

.form-textarea {
    min-height: 300px;
    resize: vertical;
    font-family: 'Courier New', monospace;
    line-height: 1.6;
}

.form-hint {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    font-style: italic;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-primary);
}

/* Upload Page Specific */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 48px;
    text-align: center;
    background: var(--bg-tertiary);
    transition: all 0.3s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--accent-color);
    background: var(--bg-primary);
}

.file-input {
    /* Nu mai ascundem input-ul, folosim opacity: 0 pentru a-l face invizibil dar funcțional */
    /* display: none; */
}

.upload-label {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.upload-icon {
    font-size: 48px;
}

.upload-text {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
}

.upload-hint {
    color: var(--text-secondary);
    font-size: 14px;
}

.file-list {
    margin-top: 20px;
}

.file-list h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 16px;
}

.file-item {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin-bottom: 8px;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.file-size {
    color: var(--text-secondary);
    font-size: 14px;
}

.upload-status {
    margin-top: 20px;
}

/* Upload Progress */
.upload-progress-container {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.progress-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.progress-filename {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.progress-status {
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 12px;
    white-space: nowrap;
}

.progress-status.status-waiting {
    color: var(--text-secondary);
    background: var(--bg-primary);
}

.progress-status.status-uploading {
    color: #ffa500;
    background: rgba(255, 165, 0, 0.1);
}

.progress-status.status-processing {
    color: #2196f3;
    background: rgba(33, 150, 243, 0.1);
}

.progress-status.status-complete {
    color: var(--accent-color);
    background: rgba(16, 163, 127, 0.1);
}

.progress-status.status-error {
    color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
}

.progress-bar-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.progress-bar {
    flex: 1;
    height: 24px;
    background: var(--bg-primary);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
    border-radius: 12px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.progress-percent {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    min-width: 40px;
    text-align: right;
}

.status-loading,
.status-success,
.status-error {
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    font-size: 14px;
}

.status-loading {
    background: rgba(16, 163, 127, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.status-success {
    background: rgba(16, 163, 127, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.status-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
}