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

:root {
    /* Color Palette - Splash Icon Theme */
    --primary-color: #e08a2e; /* Orange-brown (icon color) */
    --primary-dark: #b86b1b;  /* Darker orange-brown */
    --primary-light: #f3c98b; /* Lighter orange */
    --secondary-color: #e08a2e; /* Use same as primary for accent */
    --background-color: #f7c98b; /* Light orange (background) */
    --surface-color: #fbe2b7; /* Very light orange for surfaces */
    --text-primary: #7a4a13; /* Dark brown for text */
    --text-secondary: #a86c2a; /* Medium brown for secondary text */
    --text-muted: #cfa46a; /* Muted brown/orange */
    --border-color: #e8b36a; /* Border color */
    --shadow: 0 2px 8px rgba(224, 138, 46, 0.08);
    --shadow-hover: 0 4px 16px rgba(224, 138, 46, 0.15);
    
    /* Typography */
    /* Increased sizes for better readability for seniors */
    --font-size-small: 15px;
    --font-size-medium: 18px;
    --font-size-large: 20px;
    --font-size-xl: 26px;
    --font-size-xxl: 36px;
    --link-color: #004085; /* High contrast blue for links */
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: var(--font-size-medium);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    min-height: 100vh;
}

/* High contrast link styles and visible focus for keyboard users */
a {
    color: var(--link-color);
}

a:focus, button:focus, input:focus, select:focus, textarea:focus {
    outline: 3px solid rgba(0, 64, 128, 0.18);
    outline-offset: 2px;
}

/* Font Size Classes */
.font-small { font-size: var(--font-size-small); }
.font-medium { font-size: var(--font-size-medium); }
.font-large { font-size: var(--font-size-large); }

.font-large .app-container { font-size: var(--font-size-large); }
.font-large h1 { font-size: 28px; }
.font-large h2 { font-size: 24px; }
.font-large h3 { font-size: 20px; }


/* App Layout */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    box-shadow: var(--shadow);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-lg);
    text-align: center;
}

.header-content {
    max-width: 600px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.logo i {
    font-size: var(--font-size-xxl);
}

.logo h1 {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    margin: 0;
}

.tagline {
    font-size: var(--font-size-medium);
    opacity: 0.9;
    margin: 0;
}

/* Navigation */
.navigation {
    display: flex;
    background: var(--surface-color);
    border-bottom: 2px solid var(--border-color);
    box-shadow: var(--shadow);
}

.nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-small);
    min-height: 70px;
}

.nav-btn:hover {
    background: var(--background-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

.nav-btn i {
    font-size: 20px;
}

/* Main Content */
.main-content {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateX(20px);
    transition: all 0.4s ease;
    pointer-events: none;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.screen.active {
    opacity: 1;
    transform: translateX(0);
    pointer-events: all;
}

/* Welcome Screen */
.welcome-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.welcome-icon {
    font-size: 64px;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.welcome-content h2 {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.welcome-content p {
    font-size: var(--font-size-medium);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.welcome-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 300px;
    margin: 0 auto;
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: 8px;
    font-size: var(--font-size-medium);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 50px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: var(--background-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* Payment Button */
.btn-payment {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: 8px;
    font-size: var(--font-size-medium);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 50px;
    background: var(--surface-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-payment:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* Payment Modal Styles */
.payment-modal-content {
    max-width: 480px;
}

.payment-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.payment-amount {
    padding: var(--spacing-md);
    border: 2px solid var(--primary-color);
    background: var(--surface-color);
    color: var(--primary-color);
    border-radius: 8px;
    font-size: var(--font-size-large);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.payment-amount:hover,
.payment-amount.selected {
    background: var(--primary-color);
    color: white;
}

.payment-amount.custom {
    grid-column: span 2;
    background: var(--background-color);
}

#custom-amount-container {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

#custom-amount {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: var(--font-size-medium);
}

#custom-amount:focus {
    border-color: var(--primary-color);
    outline: none;
}

#payment-form-container {
    margin-top: var(--spacing-lg);
}

/* Modal Base Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--surface-color);
    border-radius: 12px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-hover);
}

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

.modal-header h2 {
    margin: 0;
    color: var(--primary-color);
}

.modal-body {
    padding: var(--spacing-lg);
}

/* Dark Mode Adjustments */
.dark-mode .payment-amount {
    background: var(--surface-color);
    border-color: var(--primary-light);
    color: var(--primary-light);
}

.dark-mode .payment-amount:hover,
.dark-mode .payment-amount.selected {
    background: var(--primary-color);
    color: white;
}

.dark-mode .payment-amount.custom {
    background: var(--background-color);
}

/* Chat Screen */
.chat-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    max-width: 800px;
    margin: 0 auto;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-height: 400px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--background-color);
    margin-bottom: var(--spacing-md);
}

.message {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    animation: slideIn 0.3s ease;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    flex-shrink: 0;
}

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

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

.message-content {
    background: var(--surface-color);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow);
    max-width: 70%;
    word-wrap: break-word;
}

.message.user .message-content {
    background: var(--primary-color);
    color: white;
}

.message-text {
    line-height: 1.6;
    margin-bottom: var(--spacing-xs);
}

/* Step Items */
.step-item {
    background: var(--background-color);
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-xs) 0;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    font-weight: 500;
}

.message.user .step-item {
    background: rgba(255, 255, 255, 0.1);
    border-left-color: white;
}

/* Tip Boxes */
.tip-box {
    background: #e3f2fd;
    border: 1px solid #90caf9;
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-sm) 0;
    font-size: var(--font-size-small);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.warning-box {
    background: #fff3e0;
    border: 1px solid #ffb74d;
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-sm) 0;
    font-size: var(--font-size-small);
    color: #e65100;
}

.success-box {
    background: #e8f5e8;
    border: 1px solid #81c784;
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-sm) 0;
    font-size: var(--font-size-small);
    color: #2e7d32;
}

.message.user .tip-box,
.message.user .warning-box,
.message.user .success-box {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.9);
}

/* Question Text */
.question-text {
    font-style: italic;
    color: var(--primary-color);
    margin: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--primary-light);
}

.message.user .question-text {
    color: rgba(255, 255, 255, 0.9);
    border-left-color: rgba(255, 255, 255, 0.5);
}

/* Better list formatting */
.message-text strong {
    color: var(--primary-color);
    font-weight: 600;
}

.message.user .message-text strong {
    color: rgba(255, 255, 255, 0.95);
}

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

.message.user .message-text em {
    color: rgba(255, 255, 255, 0.8);
}

/* Improved spacing for formatted content */
.message-text br {
    line-height: 1.8;
}

/* Dark mode adjustments for formatted content */
.dark-mode .step-item {
    background: #2a2a2a;
    border-left-color: var(--primary-light);
}

.dark-mode .tip-box {
    background: #1a237e;
    border-color: #3f51b5;
    color: #e3f2fd;
}

.dark-mode .warning-box {
    background: #e65100;
    border-color: #ff9800;
    color: #fff3e0;
}

.dark-mode .success-box {
    background: #1b5e20;
    border-color: #4caf50;
    color: #e8f5e8;
}

/* Chat Input */
.chat-input-container {
    background: var(--surface-color);
    border-radius: 12px;
    border: 2px solid var(--border-color);
    overflow: hidden;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
}

#chat-input {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-family: inherit;
    font-size: var(--font-size-medium);
    line-height: 1.5;
    min-height: 44px;
    max-height: 120px;
    padding: var(--spacing-sm);
    background: var(--background-color);
    border-radius: 8px;
}

.send-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.send-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.send-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

.input-actions {
    display: flex;
    padding: 0 var(--spacing-md) var(--spacing-md);
    gap: var(--spacing-sm);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: var(--font-size-small);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Solutions Screen */
.solutions-container {
    max-width: 1000px;
    margin: 0 auto;
}

.solutions-header {
    margin-bottom: var(--spacing-xl);
}

.solutions-header h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-xl);
}

.search-container {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.search-container i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

#solutions-search {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 40px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: var(--font-size-medium);
    outline: none;
    transition: border-color 0.3s ease;
}

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

.categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.category-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-small);
    font-weight: 500;
}

.category-btn:hover,
.category-btn.active {
    background: var(--primary-color);
    color: white;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.solution-card {
    background: var(--surface-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.solution-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-medium);
    font-weight: 600;
}

.solution-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-small);
}

.solution-steps {
    list-style: none;
    counter-reset: step-counter;
}

.solution-steps li {
    counter-increment: step-counter;
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-lg);
    position: relative;
    font-size: var(--font-size-small);
    line-height: 1.5;
}

.solution-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    background: var(--primary-color);
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
}

/* Settings Screen */
.settings-container {
    max-width: 600px;
    margin: 0 auto;
}

.settings-container h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    font-size: var(--font-size-xl);
}

.settings-section {
    background: var(--surface-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.settings-section h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-medium);
    font-weight: 600;
}

.setting-item {
    margin-bottom: var(--spacing-md);
}

.setting-item label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.setting-item input,
.setting-item select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: var(--font-size-medium);
    outline: none;
    transition: border-color 0.3s ease;
}

.setting-item input:focus,
.setting-item select:focus {
    border-color: var(--primary-color);
}

.setting-item input[type="checkbox"] {
    width: auto;
    margin-right: var(--spacing-xs);
}

.setting-item small {
    display: block;
    color: var(--text-muted);
    font-size: var(--font-size-small);
    margin-top: var(--spacing-xs);
}

.about-info p {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

/* AI Status Indicator */
.ai-status {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background-color);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.ai-status p {
    margin: 0;
    font-size: var(--font-size-small);
}

#ai-status-text {
    font-weight: 600;
    color: var(--primary-color);
}

.ai-status.connected #ai-status-text {
    color: var(--secondary-color);
}

.ai-status.error #ai-status-text {
    color: #d32f2f;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    background: var(--surface-color);
    padding: var(--spacing-xl);
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.loading-spinner i {
    font-size: var(--font-size-xxl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

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

/* Dark Mode */
.dark-mode {
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #333333;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        margin: 0;
        min-height: 100vh;
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .logo h1 {
        font-size: var(--font-size-xl);
    }
    
    .nav-btn {
        padding: var(--spacing-sm);
        font-size: 12px;
        min-height: 60px;
    }
    
    .nav-btn i {
        font-size: 16px;
    }
    
    .screen {
        padding: var(--spacing-md);
    }
    
    .welcome-buttons {
        gap: var(--spacing-sm);
    }
    
    .categories {
        gap: var(--spacing-xs);
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .message-content {
        max-width: 85%;
    }
}

@media (max-width: 480px) {
    .nav-btn span {
        font-size: 11px;
    }
    
    .welcome-content {
        padding: var(--spacing-lg);
    }
    
    .welcome-icon {
        font-size: 48px;
    }
    
    .chat-input-container {
        border-radius: 8px;
    }
    
    .input-wrapper {
        padding: var(--spacing-sm);
    }
}