/* ============================================
   SpainTrainer - Main Stylesheet
   Modern, minimalist design
   ============================================ */

:root {
    /* Light theme colors */
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #6366f1;
    --secondary-color: #ec4899;
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

/* Dark theme (future enhancement) */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #0f172a;
        --background-secondary: #1e293b;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --border-color: #334155;
    }
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html, body {
    height: 100%;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-dark);
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   Login Page Styles
   ============================================ */

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    padding: var(--spacing-md);
}

.login-card {
    background: var(--background);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-2xl);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.login-logo {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.login-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Form Styles
   ============================================ */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    background-color: var(--background);
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

/* ============================================
   Button Styles
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    width: 100%;
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ============================================
   Alert Styles
   ============================================ */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
}

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

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.alert-info {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

/* ============================================
   Loading Spinner
   ============================================ */

.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.hidden {
    display: none;
}

.text-muted {
    color: var(--text-secondary);
}

/* ============================================
   Dashboard Layout
   ============================================ */

.dashboard-container {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--background-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base);
}

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

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 700;
    font-size: 1.125rem;
}

.sidebar-logo-icon {
    font-size: 1.5rem;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    transition: color var(--transition-base);
}

.sidebar-close:hover {
    color: var(--text-primary);
}

/* Sidebar Buttons */
.sidebar-btn-primary {
    margin: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
}

.sidebar-btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.sidebar-search {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.sidebar-search-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.sidebar-search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.sidebar-section {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.conversations-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.conversation-item {
    padding: var(--spacing-md);
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 0.875rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.conv-item-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.conv-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    display: block;
}

.conv-meta {
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: block;
}

.conversation-item.active .conv-meta {
    color: rgba(255,255,255,0.7);
}

.conv-delete-btn {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 2px 5px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
}

.conversation-item:hover .conv-delete-btn {
    opacity: 1;
}

.conv-delete-btn:hover {
    background: rgba(255,0,0,0.1);
    color: #cc0000;
}

.conversation-item.active .conv-delete-btn {
    color: rgba(255,255,255,0.6);
}

.conversation-item.active .conv-delete-btn:hover {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

.conversations-loading {
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.conversation-item:hover {
    background-color: var(--primary-light);
    color: #ffffff;
    border-color: var(--primary-color);
}

.conversation-item.active {
    background-color: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.conversations-empty {
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.conversations-empty p {
    margin: var(--spacing-sm) 0;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.sidebar-btn-secondary {
    padding: var(--spacing-md);
    background-color: var(--background);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
}

.sidebar-btn-secondary:hover {
    background-color: var(--background-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Dashboard Header */
.dashboard-header {
    background-color: var(--background);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex: 1;
}

.header-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: var(--spacing-md);
    transition: color var(--transition-base);
}

.header-menu-btn:hover {
    color: var(--primary-color);
}

.header-title-section {
    flex: 1;
}

.header-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    gap: var(--spacing-lg);
}

.header-settings-display {
    display: flex;
    gap: var(--spacing-lg);
}

.setting-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.setting-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.setting-value {
    color: var(--primary-color);
    font-weight: 700;
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--background);
    overflow-y: auto;
}

.chat-empty-state {
    text-align: center;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

.chat-empty-state h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.chat-empty-state p {
    font-size: 0.875rem;
}

.messages-area {
    width: 100%;
    max-width: 900px;
    padding: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.message {
    display: flex;
    gap: var(--spacing-lg);
    animation: slideIn var(--transition-base);
}

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

.message.user {
    justify-content: flex-end;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background-color: var(--primary-color);
    color: #ffffff;
}

.message.assistant .message-avatar {
    background-color: var(--background-secondary);
    color: var(--primary-color);
}

.message-content {
    max-width: 70%;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.message.user .message-content {
    align-items: flex-end;
}

.message-bubble {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.message.user .message-bubble {
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: var(--radius-lg) var(--radius-sm) var(--radius-lg) var(--radius-lg);
}

.message.assistant .message-bubble {
    background-color: var(--background-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--radius-sm);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.message.user .message-time {
    text-align: right;
}

/* Input Area */
.input-area {
    background-color: var(--background);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-2xl);
    box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.message-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    transition: all var(--transition-base);
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.input-send-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.input-send-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.input-send-btn:active {
    transform: translateY(0);
}

.input-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
    text-align: center;
}

/* ============================================
   Settings Page
   ============================================ */

.settings-container {
    min-height: 100vh;
    background-color: var(--background);
}

.settings-header {
    background-color: var(--background);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 10;
}

.settings-header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.settings-back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-base);
    border-radius: var(--radius-md);
}

.settings-back-btn:hover {
    background-color: var(--background-secondary);
}

.settings-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
}

.settings-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.settings-section {
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
}

.settings-section-header {
    margin-bottom: var(--spacing-2xl);
}

.settings-section-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.settings-section-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.settings-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.settings-option {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.settings-option:hover {
    background-color: var(--background);
    border-color: var(--primary-color);
}

.settings-radio {
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.settings-option-label {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.level-name,
.grammar-name,
.topic-name {
    font-weight: 600;
    color: var(--text-primary);
}

.level-description {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Settings Form */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group-settings {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label-settings {
    font-weight: 600;
    font-size: 0.875rem;
}

.form-input-settings,
.form-select-settings {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.form-input-settings:focus,
.form-select-settings:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Settings Actions */
.settings-actions {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

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

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

.settings-alert {
    margin-top: var(--spacing-lg);
    min-height: 1rem;
}

/* ============================================
   Button Styles
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ============================================
   Typing Indicator
   ============================================ */

.typing-bubble {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 14px 18px !important;
    min-width: 56px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: typing-bounce 1.2s infinite ease-in-out;
    display: inline-block;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30%            { transform: translateY(-6px); opacity: 1; }
}

/* ============================================
   Markdown Rendering inside message bubbles
   ============================================ */

.message.assistant .message-bubble p {
    margin: 0 0 0.5em 0;
}

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

.message.assistant .message-bubble strong {
    font-weight: 700;
    color: var(--primary-color);
}

.message.assistant .message-bubble em {
    font-style: italic;
}

.message.assistant .message-bubble code {
    background: rgba(0, 0, 0, 0.07);
    padding: 1px 5px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.88em;
}

.message.assistant .message-bubble pre {
    background: rgba(0, 0, 0, 0.07);
    border-radius: 6px;
    padding: 10px 14px;
    overflow-x: auto;
    margin: 0.5em 0;
}

.message.assistant .message-bubble pre code {
    background: none;
    padding: 0;
    font-size: 0.85em;
}

.message.assistant .message-bubble h1,
.message.assistant .message-bubble h2,
.message.assistant .message-bubble h3 {
    font-weight: 700;
    margin: 0.4em 0 0.2em 0;
    color: var(--text-primary);
}

.message.assistant .message-bubble h1 { font-size: 1.15em; }
.message.assistant .message-bubble h2 { font-size: 1.05em; }
.message.assistant .message-bubble h3 { font-size: 0.98em; }

.message.assistant .message-bubble ul {
    margin: 0.3em 0;
    padding-left: 1.4em;
}

.message.assistant .message-bubble li {
    margin-bottom: 0.2em;
}

/* Error message */
.message.error-message .message-bubble {
    background-color: #fff0f0 !important;
    border-color: #ffcccc !important;
    color: #cc0000 !important;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .dashboard-container {
        position: relative;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        z-index: 100;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-close {
        display: block;
    }

    .header-menu-btn {
        display: block;
    }

    .dashboard-header {
        padding: var(--spacing-lg);
    }

    .header-title {
        font-size: 1.125rem;
    }

    .header-settings-display {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .setting-badge {
        font-size: 0.75rem;
    }

    .message-content {
        max-width: 85%;
    }

    .input-area {
        padding: var(--spacing-lg);
    }

    .input-wrapper {
        max-width: 100%;
    }

    .messages-area {
        max-width: 100%;
        padding: var(--spacing-lg);
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .settings-actions {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    .login-card {
        padding: var(--spacing-lg);
    }

    .login-title {
        font-size: 1.5rem;
    }

    .login-logo {
        font-size: 2.5rem;
    }

    .sidebar {
        width: 100%;
    }

    .dashboard-header {
        padding: var(--spacing-md);
    }

    .header-left {
        gap: var(--spacing-sm);
    }

    .header-title {
        font-size: 1rem;
    }

    .header-right {
        display: none;
    }

    .message-content {
        max-width: 100%;
    }

    .input-wrapper {
        flex-direction: column;
    }

    .input-send-btn {
        width: 100%;
    }

    .settings-content {
        padding: var(--spacing-lg);
    }

    .settings-header-content {
        flex-wrap: wrap;
        padding: var(--spacing-lg);
    }
}