/* Modern Mobile-First UX - Optimized for Performance */
/* Enhanced for users 40+ with better readability and accessibility */

:root {
    --primary: #032459;
    --primary-dark: #021a3d;
    --secondary: #25D366;
    --bg: #f5f7fa;
    --surface: #ffffff;
    --text: #1a1a1a; /* Darker text for better contrast */
    --border: #d0d0d0; /* Higher contrast borders */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.12);
    --transition: 0.3s ease; /* Slightly slower transitions for better perception */
    
    /* Safe area insets for notch support */
    --safe-top: env(safe-area-inset-top);
    --safe-bottom: env(safe-area-inset-bottom);
    --safe-left: env(safe-area-inset-left);
    --safe-right: env(safe-area-inset-right);
}

/* Dark mode variables */
/* Removido para forçar sempre o tema claro */

/* Light mode variables */
/* Forçando sempre o tema claro */

/* Base reset - minimal for performance */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f5f7fa; /* Forçando fundo claro */
    color: #1a1a1a; /* Forçando texto escuro */
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* Main container - optimized with CSS containment */
.chat-container {
    display: flex;
    flex-direction: column;
    min-height: var(--vh, 100dvh);
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
    background: var(--surface);
    contain: layout style paint;
    max-width: 100%;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}

/* Header - fixed with safe area */
.chat-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    padding-top: calc(0.75rem + var(--safe-top));
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
    contain: layout style;
}

.logo {
    flex-shrink: 0;
    color: white;
}

.logo svg {
    display: block;
    width: 40px;
    height: 40px;
}

.chat-header h1 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Header WhatsApp button */
.header-whatsapp-btn {
    background: #25D366;
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: all var(--transition);
    flex-shrink: 0;
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(37, 211, 102, 0.3);
}

.header-whatsapp-btn:hover {
    background: #20BA5A;
    box-shadow: 0 3px 8px rgba(37, 211, 102, 0.4);
}

.header-whatsapp-btn:active {
    background: #1DA851;
    transform: scale(0.95);
}

/* Pull to refresh indicator */
.pull-indicator {
    position: absolute;
    top: calc(60px + var(--safe-top));
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: var(--surface);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transition: opacity var(--transition), transform var(--transition);
    z-index: 10;
    color: var(--primary);
}

.pull-indicator.active {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.pull-indicator svg {
    animation: spin 1s linear infinite;
}

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

/* Messages area - optimized scrolling */
.chat-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    padding-bottom: calc(var(--footer-height, 80px) + var(--safe-bottom) + 16px); /* Space for fixed input area and safe area */
    background: var(--bg);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    contain: layout style paint;
}

/* When WhatsApp section is visible */
.whatsapp-visible .chat-messages {
    padding-bottom: calc(var(--footer-height, 80px) + var(--whatsapp-height, 140px) + var(--safe-bottom) + 16px);
}

/* Optimized scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.2);
    border-radius: 2px;
}

/* Message bubbles - simplified for performance */
/* Enhanced for users 40+ with larger text and better spacing */
.message {
    max-width: 85%;
    padding: 1rem 1.25rem; /* Increased padding for better touch targets */
    border-radius: 1.25rem; /* Slightly larger border radius */
    word-wrap: break-word;
    contain: layout style paint;
    will-change: transform;
    animation: slideIn 0.5s ease; /* Slower animation for better perception */
    font-size: 1.125rem; /* Larger font size for better readability */
    line-height: 1.5; /* Better line spacing */
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(15px); /* Slightly larger movement */
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-message {
    background: #ffffff;
    color: #000000;
    align-self: flex-start;
    border-bottom-left-radius: 0.25rem;
    border: 1px solid #d0d0d0;
}

.user-message {
    align-self: flex-end;
    background: var(--primary);
    color: white;
    border-bottom-right-radius: 0.25rem;
}

.bot-message {
    align-self: flex-start;
    background: var(--border);
}

/* Entry message - for user join animation */
.entry-message {
    align-self: center;
    background: transparent;
    color: #666666;
    font-style: italic;
    font-size: 1.125rem;
    padding: 0.75rem 1.5rem;
    text-align: center;
    width: 90%;
    max-width: none;
    margin: 0.75rem 0;
    border-radius: 1rem;
}

.message-header {
    font-weight: 600;
    font-size: 0.875rem; /* Larger header font */
    margin-bottom: 0.375rem; /* More spacing */
    opacity: 0.9;
}

.message-timestamp {
    font-size: 0.75rem; /* Larger timestamp font */
    opacity: 0.7;
    margin-top: 0.375rem; /* More spacing */
    text-align: right;
}

/* Input area - optimized touch targets */
/* Enhanced for users 40+ with larger touch targets and better visibility */
.input-area {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: none;
    display: flex;
    align-items: center;
    gap: 0.75rem; /* Increased gap for better separation */
    padding: 16px; /* Increased padding */
    padding-bottom: calc(16px + var(--safe-bottom));
    background: var(--surface);
    border-top: 2px solid var(--border); /* Thicker border for better visibility */
    flex-shrink: 0;
    z-index: 100;
}

#user-input {
    flex: 1;
    min-width: 0;
    width: auto;
    padding: 1rem 1.25rem; /* Increased padding */
    border: 2px solid var(--border); /* Thicker border */
    border-radius: 2rem; /* Larger border radius */
    background: var(--surface);
    color: var(--text);
    font-size: 1.125rem; /* Larger font size */
    font-family: inherit;
    transition: border-color var(--transition);
    min-height: 56px; /* Larger minimum height for better touch targets */
}

#user-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(3, 36, 89, 0.2); /* Focus ring for better visibility */
}

#user-input::placeholder {
    color: rgba(0,0,0,0.5); /* Darker placeholder for better visibility */
    font-size: 1.125rem; /* Larger placeholder font */
}

/* Send button - optimized touch target */
/* Enhanced for users 40+ with larger touch targets */
#send-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    width: 56px; /* Larger width */
    height: 56px; /* Larger height */
    min-width: 56px; /* Larger minimum width */
    min-height: 56px; /* Larger minimum height */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition), opacity var(--transition);
    flex: 0 0 auto;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15); /* Subtle shadow for better visibility */
}

#send-btn:hover {
    background: var(--primary-dark); /* Hover state for better feedback */
    transform: scale(1.05); /* Slight scale on hover */
}

#send-btn:active {
    transform: scale(0.95);
}

#send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none; /* No transform when disabled */
}

/* WhatsApp section container - Dynamic visibility */
/* Enhanced for users 40+ with better spacing and visibility */
.whatsapp-section {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: none; /* Hidden by default */
    flex-direction: column;
    gap: 1rem; /* Increased gap for better separation */
    padding: 1.25rem; /* Increased padding */
    padding-bottom: calc(1.25rem + var(--safe-bottom));
    background: var(--surface);
    border-top: 2px solid var(--border); /* Thicker border for better visibility */
    flex-shrink: 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease; /* Slower transitions for better perception */
    z-index: 101;
    max-width: 100%;
}

.whatsapp-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Specialist available indicator */
/* Enhanced for users 40+ with larger, clearer indicators */
.specialist-available {
    display: flex;
    align-items: center;
    gap: 0.75rem; /* Increased gap */
    font-size: 1rem; /* Larger font size */
    font-weight: 600; /* Bolder text for better visibility */
    color: var(--text);
    justify-content: center;
    padding: 0.5rem; /* Added padding */
}

.specialist-available .pulse-dot {
    width: 16px; /* Larger dot */
    height: 16px; /* Larger dot */
    background: #22c55e;
    border-radius: 50%;
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

.specialist-available .pulse-dot::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes pulse-ring {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(2);
        opacity: 0;
    }
}

/* WhatsApp button - positioned below input area */
/* Enhanced for users 40+ with larger touch targets and clearer labels */
.whatsapp-button {
    background: var(--secondary);
    color: white;
    height: 64px; /* Larger height for better touch targets */
    min-height: 64px; /* Larger minimum height */
    border-radius: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem; /* Increased gap */
    box-shadow: var(--shadow-md);
    transition: transform var(--transition);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem; /* Larger font size */
    padding: 0 2rem; /* More padding for better touch area */
    border: 2px solid var(--secondary); /* Border for better visibility */
}

.whatsapp-button:hover {
    background: #1da851; /* Hover state for better feedback */
    border-color: #1da851; /* Border color change on hover */
    transform: scale(1.02); /* Subtle scale on hover */
}

.whatsapp-button:active {
    transform: scale(0.98); /* Subtle scale on active */
}

/* Typing indicator - simplified */
.typing-indicator {
    display: flex;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    background: var(--border);
    border-radius: 1rem;
    border-bottom-left-radius: 0.25rem;
    align-self: flex-start;
    max-width: 60px;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: typing 1.2s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-4px);
    }
}

/* Skeleton loading */
.skeleton-message {
    height: 60px;
    background: linear-gradient(90deg, var(--border) 25%, rgba(0,0,0,0.05) 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 1rem;
    max-width: 70%;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Tablet/Desktop optimizations */
@media (min-width: 768px) {
    .chat-container {
        max-width: 480px;
        height: 95vh;
        margin: 2.5vh auto;
        border-radius: 1rem;
        box-shadow: var(--shadow-md);
    }
    
    .chat-header {
        border-radius: 1rem 1rem 0 0;
    }
    
    .input-area {
        width: 480px;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .whatsapp-section {
        max-width: 480px;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .whatsapp-section.visible {
        transform: translateX(-50%) translateY(0);
    }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .message {
        border: 2px solid currentColor;
    }
    
    #user-input {
        border-width: 2px;
    }
}