/* History Man Web Application Styles */
/* DEPLOY_VERSION: 20251101_151632 */

:root {
    --primary-color: #4A9EFF;
    --secondary-color: #6C757D;
    --success-color: #28A745;
    --error-color: #DC3545;
    --warning-color: #FFC107;
    --bg-color: #FAFAFA;
    --card-bg: #FFFFFF;
    --text-primary: #262730;
    --text-secondary: #808495;
    --border-color: #E6EBF1;
    --sidebar-bg: #F0F2F6;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.12);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.screen {
    min-height: 100vh;
}

/* Login Screen */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-container h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.logo-container p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

#login-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: #3A8EF6;
    box-shadow: 0 2px 8px rgba(74, 158, 255, 0.3);
}

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

.btn-secondary:hover {
    background-color: #5A6268;
}

.btn-danger {
    background-color: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background-color: #D32F2F;
}

/* App Header */
.app-header {
    background: white;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 2rem;
    max-width: 100%;
}

.header-content h1 {
    font-size: 1.35rem;
    color: var(--text-primary);
    font-weight: 600;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* App Container */
.app-container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 70px);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 0;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    padding: 2rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background: white;
}

.sidebar-logo-image {
    width: 180px;
    height: auto;
    margin-bottom: 1rem;
    border-radius: 8px;
}

.sidebar-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #8B0000;
    margin: 0 0 1rem 0;
}

.sidebar-quote {
    font-size: 0.85rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.5rem 0;
    flex: 1;
}

.nav-item {
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    text-align: left;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 4px solid transparent;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-item:hover {
    background-color: rgba(74, 158, 255, 0.08);
}

.nav-item.active {
    background-color: rgba(74, 158, 255, 0.12);
    border-left-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 3rem;
    overflow-y: auto;
    background: var(--bg-color);
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* Chat View */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.chat-header h2 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    background: white;
}

.welcome-message {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.welcome-message h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.75rem;
    font-weight: 600;
}

.welcome-message p {
    font-size: 1rem;
    line-height: 1.6;
}

.welcome-message .hint {
    margin-top: 2rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.message {
    margin-bottom: 1.5rem;
    padding: 1rem 1.25rem;
    border-radius: 8px;
    max-width: 100%;
    word-wrap: break-word;
}

.message.user {
    background-color: #F0F7FF;
    color: var(--text-primary);
    border-left: 3px solid var(--primary-color);
}

.message.assistant {
    background-color: #F8F9FA;
    border-left: 3px solid var(--secondary-color);
}

.message-content {
    margin-bottom: 0.5rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

.message-metadata {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.metadata-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.message-sources {
    margin-top: 1rem;
    padding: 1rem;
    background: #F8F9FA;
    border-radius: 6px;
    border-left: 3px solid var(--secondary-color);
}

.message-sources strong {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.source-item {
    padding: 0.75rem;
    margin: 0.5rem 0;
    background: white;
    border-radius: 6px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.source-item:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.source-filename {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.source-score {
    color: var(--success-color);
    font-size: 0.85rem;
    margin-left: 0.5rem;
}

.source-content {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.5rem;
    font-style: italic;
}

.chat-input-container {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
    background: white;
}

#chat-input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    transition: all 0.2s;
    min-height: 80px;
    max-height: 200px;
    line-height: 1.5;
}

#chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.1);
}

#send-btn {
    min-width: 120px;
    white-space: nowrap;
    align-self: flex-end;
    height: fit-content;
    padding: 0.875rem 1.5rem;
}

/* Upload View */
.upload-container {
    max-width: 900px;
    margin: 0 auto;
}

.upload-container h2 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.upload-area {
    background: var(--card-bg);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

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

.upload-area.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(74, 158, 255, 0.05);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.upload-hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

#file-input {
    display: none;
}

.upload-progress {
    margin-top: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

#upload-status {
    color: var(--text-primary);
    font-weight: 500;
}

#upload-percentage {
    color: var(--primary-color);
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background-color: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
    border-radius: 6px;
}

.upload-results {
    margin-top: 2rem;
}

.upload-result-item {
    padding: 1rem;
    margin-bottom: 1rem;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.upload-result-item.success {
    border-left: 4px solid var(--success-color);
}

.upload-result-item.error {
    border-left: 4px solid var(--error-color);
}

/* Documents View */
.documents-container h2 {
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.documents-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.documents-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.document-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: all 0.2s;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.document-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.document-icon {
    font-size: 2.5rem;
    text-align: center;
}

.document-name {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.document-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.document-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: auto;
}

.document-actions .btn {
    flex: 1;
    padding: 0.6rem;
    font-size: 0.85rem;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-modal {
    background: white;
    padding: 3rem 4rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 4px solid var(--primary-color);
    animation: pulse 2s ease-in-out infinite;
}

.thinking-eye {
    width: 200px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    margin-bottom: 1.5rem;
}

.loading-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 0 0.5rem 0;
    letter-spacing: 3px;
}

.loading-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }
    50% { 
        transform: scale(1.02);
        box-shadow: 0 25px 70px rgba(74, 158, 255, 0.4);
    }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 2000;
}

.toast {
    background: var(--card-bg);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    margin-bottom: 1rem;
    min-width: 300px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.error-message {
    color: var(--error-color);
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .nav-item {
        border-left: none;
        border-bottom: 3px solid transparent;
    }
    
    .nav-item.active {
        border-left: none;
        border-bottom-color: var(--primary-color);
    }
    
    .message.user {
        margin-left: 10%;
    }
    
    .message.assistant {
        margin-right: 10%;
    }
    
    .documents-list {
        grid-template-columns: 1fr;
    }
}