/* Veerenstael Kleurenpalet */
:root {
    --veerenstael-zwart: #1D1D1B;
    --veerenstael-wit: #FFFFFF;
    --veerenstael-blauw: #2A6085;
    --veerenstael-offwhite: #FBF5EC;
    --veerenstael-terracotta: #B0543B;
    --veerenstael-offblue: #BFD4DA;
    --veerenstael-offyellow: #E0A943;
    
    --shadow-sm: 0 2px 4px rgba(29, 29, 27, 0.1);
    --shadow-md: 0 4px 6px rgba(29, 29, 27, 0.15);
    --shadow-lg: 0 10px 15px rgba(29, 29, 27, 0.2);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--veerenstael-offwhite);
    color: var(--veerenstael-zwart);
    line-height: 1.6;
}

/* Header */
.header {
    background: var(--veerenstael-blauw);
    color: var(--veerenstael-wit);
    padding: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

.logo {
    height: 50px;
    width: auto;
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.main-content {
    display: block;
    max-width: 900px;
    margin: 2rem auto;
}

/* Cards */
.card {
    background: var(--veerenstael-wit);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

/* Sidebar */
.sidebar h2 {
    color: var(--veerenstael-blauw);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Upload Section */
.upload-section {
    margin-bottom: 1.5rem;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--veerenstael-blauw);
    color: var(--veerenstael-wit);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.upload-btn:hover {
    background: var(--veerenstael-terracotta);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Documents List */
.documents-list {
    max-height: 400px;
    overflow-y: auto;
}

.empty-state {
    text-align: center;
    color: #999;
    padding: 2rem;
    font-style: italic;
}

.document-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: var(--veerenstael-offwhite);
    border-radius: 8px;
    border-left: 3px solid var(--veerenstael-blauw);
    cursor: pointer;
    transition: all 0.3s ease;
}

.document-item:hover {
    background: var(--veerenstael-offblue);
    transform: translateX(3px);
}

.document-item.selected {
    background: var(--veerenstael-blauw);
    color: var(--veerenstael-wit);
    border-left-color: var(--veerenstael-offyellow);
}

.document-info {
    flex: 1;
}

.document-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.document-meta {
    font-size: 0.75rem;
    opacity: 0.7;
}

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

.doc-delete-btn {
    background: var(--veerenstael-terracotta);
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: opacity 0.2s;
}

.doc-delete-btn:hover {
    opacity: 0.8;
}

/* Statistics Card */
.stats-card h3 {
    color: var(--veerenstael-blauw);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--veerenstael-offwhite);
}

.stat-label {
    color: #666;
    font-size: 0.9rem;
}

.stat-value {
    font-weight: 600;
    color: var(--veerenstael-blauw);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--veerenstael-offwhite);
    border-radius: 4px;
    margin-top: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--veerenstael-blauw), var(--veerenstael-offyellow));
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* Chat Container */
.chat-container-full {
    width: 100%;
}

.chat-card {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 600px;
}

/* Settings Bar */
.settings-bar {
    padding: 1rem;
    background: var(--veerenstael-offwhite);
    border-radius: 8px;
    margin-bottom: 1rem;
}

.thinking-toggle {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
}

.toggle-label input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 50px;
    height: 26px;
    background: var(--veerenstael-blauw);
    border-radius: 13px;
    transition: background 0.3s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
}

.toggle-label input:checked + .toggle-slider {
    background: var(--veerenstael-terracotta);
}

.toggle-label input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.toggle-text {
    font-weight: 500;
    color: var(--veerenstael-zwart);
}

.mode-thinking {
    display: none;
}

.toggle-label input:checked ~ .toggle-text .mode-quick {
    display: none;
}

.toggle-label input:checked ~ .toggle-text .mode-thinking {
    display: inline;
}

.mode-info {
    padding-left: 66px;
}

.mode-info small {
    color: #666;
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scroll-behavior: smooth;
}

.welcome-message {
    text-align: center;
    padding: 3rem 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.welcome-message h2 {
    color: var(--veerenstael-blauw);
    margin-bottom: 1rem;
}

.welcome-message ul {
    text-align: left;
    list-style: none;
    margin: 1.5rem 0;
}

.welcome-message li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
}

.welcome-tip {
    margin-top: 2rem;
    padding: 1rem;
    background: var(--veerenstael-offblue);
    border-radius: 8px;
    border-left: 4px solid var(--veerenstael-blauw);
}

/* Message bubbles */
.message {
    margin-bottom: 1.5rem;
    animation: fadeIn 0.3s ease;
}

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

.message-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.message-user .message-header {
    color: var(--veerenstael-blauw);
}

.message-ai .message-header {
    color: var(--veerenstael-terracotta);
}

.message-content {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    line-height: 1.6;
}

.message-user .message-content {
    background: var(--veerenstael-blauw);
    color: var(--veerenstael-wit);
    margin-left: 2rem;
}

.message-ai .message-content {
    background: var(--veerenstael-offwhite);
    color: var(--veerenstael-zwart);
    margin-right: 2rem;
    border-left: 3px solid var(--veerenstael-terracotta);
}

.message-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    color: #666;
    background: var(--veerenstael-offwhite);
    border-radius: 6px;
}

.thinking-process {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--veerenstael-offblue);
    border-radius: 8px;
    font-size: 0.85rem;
    color: #555;
}

.thinking-process summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--veerenstael-blauw);
    margin-bottom: 0.5rem;
}

/* Selected Documents */
.selected-docs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0;
}

.selected-doc-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: var(--veerenstael-offblue);
    color: var(--veerenstael-zwart);
    border-radius: 15px;
    font-size: 0.85rem;
}

/* Input Area */
.chat-input-container {
    border-top: 1px solid var(--veerenstael-offwhite);
    padding-top: 1rem;
}

.input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

#user-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--veerenstael-offblue);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    resize: none;
    max-height: 120px;
    transition: border-color 0.3s;
}

#user-input:focus {
    outline: none;
    border-color: var(--veerenstael-blauw);
}

.send-button {
    padding: 0.75rem 1.5rem;
    background: var(--veerenstael-blauw);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-button:hover:not(:disabled) {
    background: var(--veerenstael-terracotta);
    transform: translateY(-2px);
}

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

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(29, 29, 27, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--veerenstael-offwhite);
    border-top-color: var(--veerenstael-blauw);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay p {
    margin-top: 1rem;
    color: var(--veerenstael-wit);
    font-size: 1.1rem;
}

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

::-webkit-scrollbar-track {
    background: var(--veerenstael-offwhite);
}

::-webkit-scrollbar-thumb {
    background: var(--veerenstael-blauw);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--veerenstael-terracotta);
}

/* Responsive Design */
@media (max-width: 968px) {
    .main-content {
        grid-template-columns: 1fr;
        margin: 1rem auto;
    }
    
    .sidebar {
        order: 2;
    }
    
    .chat-container {
        order: 1;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }
    
    .header {
        padding: 1rem 0;
    }
    
    .header .container {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .logo {
        height: 40px;
    }
    
    .header h1 {
        font-size: 1.2rem;
    }
    
    .main-content {
        margin: 0.5rem auto;
        padding: 0 0.5rem;
    }
    
    .card {
        padding: 1rem;
        border-radius: 8px;
    }
    
    .chat-card {
        height: calc(100vh - 180px);
        min-height: 500px;
    }
    
    .chat-messages {
        padding: 0.75rem;
    }
    
    .message {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }
    
    .message-header {
        font-size: 0.85rem;
        margin-bottom: 0.4rem;
    }
    
    .message-content {
        font-size: 0.95rem;
    }
    
    .message-meta {
        font-size: 0.7rem;
        padding: 0.4rem;
        margin-top: 0.4rem;
    }
    
    .message-user .message-content {
        margin-left: 0;
    }
    
    .message-ai .message-content {
        margin-right: 0;
    }
    
    .chat-input-container {
        padding: 0.75rem;
    }
    
    #user-input {
        font-size: 1rem;
        padding: 0.75rem;
    }
    
    #send-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .welcome-message h2 {
        font-size: 1.2rem;
    }
    
    .welcome-message p {
        font-size: 0.95rem;
    }
    
    .welcome-message ul {
        font-size: 0.9rem;
    }
}

/* Extra small devices */
@media (max-width: 380px) {
    .header h1 {
        font-size: 1rem;
    }
    
    .logo {
        height: 35px;
    }
    
    .card {
        padding: 0.75rem;
    }
    
    .chat-messages {
        padding: 0.5rem;
    }
    
    .message {
        padding: 0.6rem;
    }
    
    .message-content {
        font-size: 0.9rem;
    }
}