/* CSS Design System for TechCorp Financial AI Client */

:root {
    /* Color Palette - HSL values for flexibility */
    --bg-primary-dark: 222, 25%, 10%;
    --bg-secondary-dark: 222, 25%, 14%;
    --bg-tertiary-dark: 222, 25%, 18%;
    --text-primary-dark: 210, 40%, 98%;
    --text-secondary-dark: 215, 20%, 75%;
    --text-muted-dark: 215, 15%, 55%;
    
    --bg-primary-light: 0, 0%, 98%;
    --bg-secondary-light: 0, 0%, 94%;
    --bg-tertiary-light: 0, 0%, 90%;
    --text-primary-light: 222, 25%, 12%;
    --text-secondary-light: 222, 15%, 35%;
    --text-muted-light: 222, 10%, 55%;

    /* Accent colors */
    --accent-emerald: 158, 95%, 45%;
    --accent-blue: 217, 90%, 60%;
    --accent-gradient: linear-gradient(135deg, hsl(217, 90%, 60%) 0%, hsl(158, 95%, 45%) 100%);
    --accent-glow: 0 0 20px rgba(59, 130, 246, 0.35);
    
    /* Layout Constants */
    --sidebar-width: 280px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Plus Jakarta Sans', 'Outfit', sans-serif;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Themes */
body.dark-mode {
    background-color: hsl(var(--bg-primary-dark));
    color: hsl(var(--text-primary-dark));
    
    --bg-app: hsl(var(--bg-primary-dark));
    --bg-side: hsl(var(--bg-secondary-dark));
    --bg-item: hsl(var(--bg-tertiary-dark));
    --text-main: hsl(var(--text-primary-dark));
    --text-sub: hsl(var(--text-secondary-dark));
    --text-mute: hsl(var(--text-muted-dark));
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(20, 27, 45, 0.7);
    --glass-border: rgba(255, 255, 255, 0.06);
    --msg-user: var(--accent-gradient);
    --msg-bot: hsl(var(--bg-secondary-dark));
}

body.light-mode {
    background-color: hsl(var(--bg-primary-light));
    color: hsl(var(--text-primary-light));
    
    --bg-app: hsl(var(--bg-primary-light));
    --bg-side: hsl(var(--bg-secondary-light));
    --bg-item: hsl(var(--bg-tertiary-light));
    --text-main: hsl(var(--text-primary-light));
    --text-sub: hsl(var(--text-secondary-light));
    --text-mute: hsl(var(--text-muted-light));
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.06);
    --msg-user: var(--accent-gradient);
    --msg-bot: hsl(var(--bg-secondary-light));
}

/* App Container */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    position: relative;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-side);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
    z-index: 10;
    transition: background-color var(--transition-normal);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.5));
}

.logo-text h2 {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text span {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-mute);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background: var(--glass-bg);
    color: var(--text-main);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.new-chat-btn:hover {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
    box-shadow: var(--accent-glow);
    transform: translateY(-2px);
}

.chat-history {
    flex: 1;
    margin-top: 24px;
    overflow-y: auto;
}

.chat-history h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-mute);
    margin-bottom: 12px;
    padding-left: 4px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    color: var(--text-sub);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    border: 1px solid transparent;
    overflow: hidden;
}

.history-item:hover, .history-item.active {
    background-color: var(--bg-item);
    color: var(--text-main);
    border-color: var(--border-color);
}

.history-item-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.history-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.rename-input {
    background: var(--bg-secondary-dark);
    border: 1px solid hsl(var(--accent-blue));
    border-radius: 4px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 13px;
    padding: 2px 4px;
    width: 100%;
    outline: none;
}

body.light-mode .rename-input {
    background: var(--bg-secondary-light);
    color: var(--text-main);
}

.history-item-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.history-item:hover .history-item-actions,
.history-item.active .history-item-actions {
    opacity: 1;
}

.action-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-mute);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.15);
}

body.light-mode .action-btn:hover {
    background-color: rgba(0, 0, 0, 0.08);
}

.history-item i {
    font-size: 14px;
    opacity: 0.7;
}

.action-btn i,
.action-btn svg {
    width: 15px;
    height: 15px;
    font-size: 11px;
    opacity: 0.6;
}

.rename-btn:hover {
    color: hsl(var(--accent-blue));
}

.delete-btn:hover {
    color: #ef4444;
}

.sidebar-footer {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.settings-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background: transparent;
    color: var(--text-sub);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.settings-toggle-btn:hover {
    color: var(--text-main);
    background-color: var(--bg-item);
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-app);
    height: 100vh;
    transition: background-color var(--transition-normal);
}

.chat-header {
    height: 70px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
}

.active-chat-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: hsl(var(--accent-emerald));
    border-radius: 50%;
    box-shadow: 0 0 8px hsl(var(--accent-emerald));
}

.status-badge span {
    font-size: 11px;
    color: var(--text-mute);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-sub);
    padding: 8px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--bg-item);
    color: var(--text-main);
}

/* Theme icon toggling */
body.dark-mode .sun-icon { display: block; }
body.dark-mode .moon-icon { display: none; }
body.light-mode .sun-icon { display: none; }
body.light-mode .moon-icon { display: block; }

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    max-width: 800px;
    margin: auto;
    animation: fadeIn var(--transition-normal);
}

.welcome-icon {
    font-size: 60px;
    margin-bottom: 20px;
    animation: bounce 2s infinite alternate;
}

.welcome-screen h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-screen p {
    color: var(--text-sub);
    font-size: 16px;
    margin-bottom: 40px;
    line-height: 1.5;
}

.suggestions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    width: 100%;
}

.suggestion-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 16px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-fast);
}

.suggestion-card:hover {
    transform: translateY(-4px);
    border-color: hsl(var(--accent-blue));
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.1);
}

.suggestion-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.suggestion-card p {
    font-size: 12px;
    color: var(--text-mute);
    margin-bottom: 0;
    line-height: 1.4;
}

/* Messages */
.message {
    display: flex;
    gap: 16px;
    max-width: 80%;
    animation: slideUp var(--transition-normal);
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot {
    align-self: flex-start;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background-color: var(--bg-item);
    border: 1px solid var(--border-color);
}

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

.message-bubble {
    padding: 14px 18px;
    border-radius: var(--border-radius-md);
    line-height: 1.6;
    font-size: 14px;
}

.message.user .message-bubble {
    background: var(--msg-user);
    color: white;
    border-bottom-right-radius: 2px;
}

.message.bot .message-bubble {
    background-color: var(--msg-bot);
    color: var(--text-main);
    border-bottom-left-radius: 2px;
    border: 1px solid var(--border-color);
}

/* Message metadata */
.message-bubble pre {
    background-color: rgba(0,0,0,0.25);
    padding: 12px;
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
    margin: 10px 0;
    font-family: monospace;
}

.message-bubble code {
    font-family: monospace;
    background-color: rgba(0,0,0,0.15);
    padding: 2px 4px;
    border-radius: 4px;
}

.message-header-data {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-blue);
    background-color: rgba(59, 130, 246, 0.15);
    border: 1px dashed rgba(59, 130, 246, 0.4);
    padding: 6px 10px;
    border-radius: var(--border-radius-sm);
    margin-top: 10px;
    font-family: monospace;
    word-break: break-all;
}

/* Input Area */
.chat-input-area {
    padding: 20px 30px;
    background-color: var(--bg-app);
    border-top: 1px solid var(--border-color);
}

.chat-form {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    max-width: 900px;
    margin: auto;
    transition: border-color var(--transition-fast);
}

.chat-form:focus-within {
    border-color: hsl(var(--accent-blue));
}

.chat-form textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    resize: none;
    font-family: inherit;
    font-size: 14px;
    max-height: 200px;
    padding: 10px 4px;
}

.send-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-gradient);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--accent-glow);
}

.input-info {
    text-align: center;
    font-size: 11px;
    color: var(--text-mute);
    margin-top: 10px;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background-color: var(--bg-side);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 480px;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
    overflow: hidden;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
}

.close-modal-btn {
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--text-sub);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.close-modal-btn:hover {
    color: var(--text-main);
}

.modal-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-sub);
}

.form-group input, .form-group select {
    background-color: var(--bg-item);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 10px 12px;
    color: var(--text-main);
    outline: none;
    font-size: 14px;
    transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group select:focus {
    border-color: hsl(var(--accent-blue));
}

.settings-test-connection {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 10px;
}

.settings-test-connection span {
    font-size: 12px;
}

.settings-test-connection span.success { color: hsl(var(--accent-emerald)); }
.settings-test-connection span.error { color: #f43f5e; }

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Buttons styling */
.primary-btn {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.primary-btn:hover {
    box-shadow: var(--accent-glow);
    transform: translateY(-1px);
}

.secondary-btn {
    background-color: var(--bg-item);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 10px 18px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.secondary-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-8px); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}