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

:root {
    --color-primary: #6A4925;
    --color-primary-strong: #0D1821;
    --color-accent: #D1BE97;
    --color-surface: #FFFFFF;
    --color-surface-alt: #F6F5F3;
    --color-text: #0D1821;
    --color-text-muted: rgba(13, 24, 33, 0.7);
    --color-text-subtle: rgba(13, 24, 33, 0.55);
    --color-border: rgba(13, 24, 33, 0.12);
    --color-border-strong: rgba(13, 24, 33, 0.2);
    --color-shadow: rgba(13, 24, 33, 0.25);
    --color-tint: rgba(209, 190, 151, 0.2);
    --color-tint-strong: rgba(209, 190, 151, 0.32);
    --color-overlay: rgba(13, 24, 33, 0.5);
    --color-on-primary: #F6F5F3;
    --color-on-dark: #F6F5F3;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-primary-strong);
    background-image: url('/assets/assistant_home.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    position: relative;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--color-text);
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(13, 24, 33, 0.35);
    pointer-events: none;
    z-index: 0;
}

.container {
    background: var(--color-surface);
    border-radius: 20px;
    box-shadow: 0 20px 60px var(--color-shadow);
    width: 100%;
    max-width: 900px;
    height: 90vh;
    max-height: 800px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 20px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    padding: 15px 20px;
    border-radius: 12px;
    max-width: 85%;
    word-wrap: break-word;
    animation: fadeIn 0.3s ease;
    line-height: 1.5;
}

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

/* Category info icon styles */
.category-info-icon {
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(209, 190, 151, 0.25);
    border: 1px solid rgba(106, 73, 37, 0.25);
    box-shadow: 0 4px 10px rgba(13, 24, 33, 0.12);
    opacity: 0.85;
    transition: opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    user-select: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.category-info-icon:hover {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: 0 6px 14px rgba(13, 24, 33, 0.18);
}

/* Category info modal styles */
.category-info-modal-overlay {
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-surface-alt);
}

.category-info-modal-overlay::-webkit-scrollbar {
    width: 8px;
}

.category-info-modal-overlay::-webkit-scrollbar-track {
    background: transparent;
}

.category-info-modal-overlay::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 10px;
}

.category-info-modal-content {
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-surface-alt);
}

.category-info-modal-content::-webkit-scrollbar {
    width: 8px;
}

.category-info-modal-content::-webkit-scrollbar-track {
    background: var(--color-surface-alt);
    border-radius: 10px;
}

.category-info-modal-content::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 10px;
}

.category-info-modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    background: var(--color-primary);
    color: var(--color-on-primary);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message.assistant {
    background: var(--color-surface-alt);
    color: var(--color-text);
    align-self: flex-start;
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 4px;
}

/* Markdown styling within assistant messages */
.message.assistant strong {
    font-weight: 600;
    color: var(--color-text);
}

.message.assistant em {
    font-style: italic;
    color: var(--color-text-muted);
}

.message.assistant code {
    background: var(--color-tint);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

@keyframes flexibleGlowSweep {
    0% {
        transform: translateX(-120%);
        opacity: 0;
    }
    20% {
        opacity: 0.9;
    }
    80% {
        opacity: 0.9;
    }
    100% {
        transform: translateX(120%);
        opacity: 0;
    }
}

.option-button-flexible {
    position: relative;
    overflow: hidden;
    border-color: rgba(106, 73, 37, 0.45);
}

.option-button-flexible::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        120deg,
        transparent 0%,
        rgba(209, 190, 151, 0.0) 20%,
        rgba(209, 190, 151, 0.65) 50%,
        rgba(209, 190, 151, 0.0) 80%,
        transparent 100%
    );
    transform: translateX(-120%);
    animation: flexibleGlowSweep 4s ease-in-out infinite;
    pointer-events: none;
}

.message.assistant ul {
    margin: 10px 0;
    padding-left: 20px;
    list-style-type: disc;
}

.message.assistant li {
    margin: 5px 0;
    line-height: 1.6;
}

.message.loading {
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
    align-self: flex-start;
}

/* Loading animation for image generation */
.loading-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 20px;
}

.loading-header {
    margin-bottom: 10px;
    padding: 18px 20px;
    background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-tint) 100%);
    border-radius: 12px;
    border-left: 4px solid var(--color-primary);
    position: relative;
    overflow: hidden;
    animation: pulseGlow 2.5s ease-in-out infinite;
}

.loading-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(106, 73, 37, 0.12), transparent);
    animation: shimmerSlide 3s ease-in-out infinite;
}

.loading-header-text {
    font-size: 1.1em;
    font-weight: 500;
    color: var(--color-primary);
    text-align: center;
    position: relative;
    z-index: 1;
    animation: textPulse 2s ease-in-out infinite;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.loading-header-text .sparkle {
    display: inline-block;
    animation: sparkle 1.5s ease-in-out infinite;
    font-size: 1.3em;
    margin-left: 4px;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 0 rgba(106, 73, 37, 0);
    }
    50% {
        box-shadow: 0 0 15px rgba(106, 73, 37, 0.2);
    }
}

@keyframes shimmerSlide {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

@keyframes textPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.9;
        transform: scale(1.01);
    }
}

@keyframes sparkle {
    0%, 100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
    25% {
        transform: scale(1.15) rotate(-8deg);
        opacity: 0.85;
    }
    50% {
        transform: scale(1.25) rotate(8deg);
        opacity: 1;
    }
    75% {
        transform: scale(1.15) rotate(-4deg);
        opacity: 0.9;
    }
}

.loading-stage {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    border-radius: 8px;
    background: var(--color-surface-alt);
    transition: all 0.3s ease;
}

.loading-stage.active {
    background: var(--color-tint);
    border-left: 4px solid var(--color-primary);
}

.loading-stage.completed {
    background: var(--color-tint-strong);
    border-left: 4px solid var(--color-primary);
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-stage.completed .loading-spinner {
    border: none;
    animation: none;
}

.loading-stage.completed .loading-spinner::after {
    content: '✓';
    color: var(--color-primary);
    font-size: 16px;
    font-weight: bold;
    display: block;
    text-align: center;
    line-height: 20px;
}

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

.loading-stage-text {
    flex: 1;
    font-size: 0.95em;
    color: var(--color-text);
}

.loading-stage.active .loading-stage-text {
    font-weight: 500;
    color: var(--color-primary);
}

.loading-stage.completed .loading-stage-text {
    color: var(--color-primary);
}

.prompt-preview {
    margin-top: 10px;
    padding: 12px;
    background: var(--color-surface-alt);
    border-radius: 6px;
    border-left: 3px solid var(--color-primary);
    font-size: 0.85em;
    color: var(--color-text-muted);
    max-height: 150px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.prompt-preview-header {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.prompt-preview-header:hover {
    color: var(--color-primary);
}

/* AI Summary Loading Animation */
.ai-summary-loading-container {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
}

.ai-summary-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-right-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    flex-shrink: 0;
}

.ai-summary-loading-text {
    flex: 1;
    font-size: 1em;
    color: var(--color-text);
    line-height: 1.6;
}

/* AI Summary Styled Display */
.ai-summary-container {
    background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-surface) 100%);
    border-radius: 12px;
    border: 2px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(13, 24, 33, 0.12);
    overflow: hidden;
    margin: 10px 0;
}

.ai-summary-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-on-primary);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.05em;
}

.ai-summary-icon {
    font-size: 1.3em;
    display: inline-block;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.ai-summary-title {
    flex: 1;
}

.ai-summary-content {
    padding: 16px 20px;
}

.ai-summary-text {
    color: var(--color-text);
    line-height: 1.5;
    font-size: 0.92em;
}

.ai-summary-section {
    display: flex;
    gap: 12px;
    margin: 10px 0;
    padding: 10px 12px;
    background: var(--color-surface);
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    transition: all 0.3s ease;
}

.ai-summary-section:hover {
    background: var(--color-surface-alt);
    box-shadow: 0 2px 8px rgba(13, 24, 33, 0.12);
    transform: translateX(4px);
}

.ai-summary-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-on-primary);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.95em;
    flex-shrink: 0;
}

.ai-summary-section-text {
    flex: 1;
    color: var(--color-text);
    line-height: 1.5;
    font-size: 0.95em;
}

.ai-summary-paragraph {
    margin: 8px 0;
    color: var(--color-text);
    line-height: 1.5;
    font-size: 0.95em;
}

.ai-summary-paragraph:first-child {
    margin-top: 0;
}

.ai-summary-paragraph:last-child {
    margin-bottom: 0;
}

.prompt-preview-content {
    display: none;
}

.prompt-preview-content.expanded {
    display: block;
}

.prompt-preview-toggle {
    font-size: 0.8em;
    color: var(--color-text-subtle);
}

/* Options container within assistant messages */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.option-button {
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    border-radius: 8px;
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    font-size: 0.95em;
    color: var(--color-text);
    font-family: inherit;
}

.option-button:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-on-primary);
    transform: translateX(5px);
}

.option-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    position: relative;
}

.option-button:disabled:hover {
    background: var(--color-surface);
    color: var(--color-text);
    transform: none;
}

/* Tooltip for disabled buttons */
.option-button[data-tooltip] {
    position: relative;
}

.option-button[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 8px;
    padding: 8px 12px;
    background: var(--color-primary-strong);
    color: var(--color-on-dark);
    border-radius: 6px;
    font-size: 0.85em;
    white-space: nowrap;
    z-index: 1000;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(13, 24, 33, 0.2);
}

.option-button[data-tooltip]:hover::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 2px;
    border: 5px solid transparent;
    border-top-color: var(--color-primary-strong);
    z-index: 1000;
    pointer-events: none;
}

.option-button:active {
    transform: translateX(3px);
}

.chat-input-container {
    display: flex;
    gap: 10px;
    padding-top: 15px;
    border-top: 1px solid var(--color-border);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#messageInput {
    flex: 1;
    padding: 12px 18px;
    border: 2px solid var(--color-border);
    border-radius: 25px;
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
    font-family: inherit;
}

#messageInput:focus {
    border-color: var(--color-primary);
}

#messageInput:disabled {
    background-color: var(--color-surface-alt);
    cursor: not-allowed;
    opacity: 0.6;
}

#messageInput:disabled::placeholder {
    color: var(--color-text-subtle);
}

#sendButton {
    padding: 12px 30px;
    background: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: inherit;
}

#sendButton:hover {
    background: var(--color-primary);
    transform: scale(1.05);
}

#sendButton:disabled {
    background: var(--color-border-strong);
    cursor: not-allowed;
    transform: none;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--color-surface-alt);
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-text-subtle);
    border-radius: 10px;
}

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

/* Authentication Modal Styles */
.auth-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-overlay);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(6px);
}

.auth-modal-content {
    background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
    border-radius: 20px;
    padding: 36px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 24px 70px var(--color-shadow);
    animation: fadeIn 0.3s ease;
    border: 1px solid rgba(246, 245, 243, 0.8);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(106, 73, 37, 0.12);
    color: var(--color-primary);
    font-size: 0.78em;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 12px;
}

.auth-header h2 {
    color: var(--color-text);
    margin-bottom: 10px;
    font-size: 1.7em;
}

.auth-header p {
    color: var(--color-text-muted);
    font-size: 0.95em;
}

.auth-form {
    display: flex;
    flex-direction: column;
    --auth-stack-gap: 16px;
    gap: var(--auth-stack-gap);
}

.auth-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--auth-stack-gap);
}

.auth-form input {
    padding: 12px 18px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 1em;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    font-family: inherit;
    background: var(--color-surface);
    box-shadow: 0 1px 2px rgba(13, 24, 33, 0.06);
}

.auth-form input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(106, 73, 37, 0.18);
    background: #ffffff;
}

.auth-form input::placeholder {
    color: var(--color-text-subtle);
}

.auth-button {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
}

.auth-button.primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-on-primary);
}

.auth-button.primary:hover {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-strong) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(106, 73, 37, 0.35);
}

.auth-button.secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.auth-button.secondary:hover {
    background: var(--color-surface-alt);
}

.auth-button.google {
    background: var(--color-surface);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.auth-button.google:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(13, 24, 33, 0.12);
}

.auth-error {
    background: var(--color-tint-strong);
    color: var(--color-primary-strong);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 0.9em;
    border: 1px solid var(--color-accent);
}

.auth-error.auth-notice {
    background: var(--color-tint);
    color: var(--color-primary);
    border-color: var(--color-accent);
}

.auth-link-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.auth-button.ghost {
    background: var(--color-surface-alt);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.auth-button.ghost:hover {
    background: var(--color-tint);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(13, 24, 33, 0.16);
}

.auth-link-hint {
    font-size: 0.82em;
    color: var(--color-text-subtle);
    text-align: center;
    margin-top: -4px;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text-subtle);
    font-size: 0.85em;
    margin: 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* User Info Header */
.user-info {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.user-details {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--color-surface);
    padding: 10px 20px;
    border-radius: 25px;
    box-shadow: 0 2px 10px rgba(13, 24, 33, 0.12);
}

.user-details span {
    color: var(--color-text);
    font-size: 0.9em;
    font-weight: 500;
}

.logout-button {
    background: var(--color-primary-strong);
    color: var(--color-on-dark);
    border: none;
    padding: 6px 15px;
    border-radius: 15px;
    font-size: 0.85em;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    font-weight: 500;
}

.logout-button:hover {
    background: var(--color-primary);
    transform: scale(1.05);
}

/* Multi-select container */
.multi-select-container {
    width: 100%;
}

.file-upload-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Download button styling - matches option-button style */
.download-button {
    margin-top: 10px;
    padding: 8px 16px;
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: 500;
    color: var(--color-primary);
    transition: all 0.2s ease;
    font-family: inherit;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-button:hover {
    background: var(--color-primary);
    color: var(--color-on-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(106, 73, 37, 0.2);
}

.download-button:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(106, 73, 37, 0.2);
}