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

:root {
    /* Cores principais */
    --primary: #128C7E;
    --primary-dark: #075E54;
    --success: #25D366;
    --danger: #DC3545;
    --warning: #FFC107;
    --light: #F8F9FA;
    --dark: #343A40;
    
    /* Cores de texto */
    --text-primary: #212529;
    --text-secondary: #6C757D;
    --text-light: #F8F9FA;
    
    /* Cores de fundo */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-success: #DCF8C6;
    --bg-danger: #FFE6E6;
    
    /* Espaçamento */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    
    /* Fontes */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    
    /* Bordas */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 25px;
    
    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    
    /* Transições */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Estilos de alto contraste */
@media (prefers-contrast: high) {
    :root {
        --primary: #006F64;
        --primary-dark: #004D45;
        --success: #1A8D44;
        --danger: #B30000;
        --text-secondary: #404040;
    }
}

/* Preferência por movimento reduzido */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    height: 100vh;
    overflow: hidden;
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 500px;
    margin: 0 auto;
    background: var(--bg-primary);
    position: relative;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.chat-header {
    background: var(--primary);
    color: var(--text-light);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    z-index: 100;
    position: relative;
    
    /* Melhor contraste para acessibilidade */
    [data-high-contrast="true"] & {
        background: var(--primary-dark);
        border-bottom: 2px solid var(--text-light);
    }
}

.history-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.history-toggle:hover {
    background: rgba(255,255,255,0.3);
}

.history-toggle:active {
    transform: translateY(-50%) scale(0.95);
}

.history-panel {
    position: absolute;
    top: 100%;
    right: 15px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    width: 280px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    z-index: 99;
}

.history-panel.show {
    max-height: 300px;
    padding: 12px;
    margin-top: 8px;
}

.history-title {
    color: #128C7E;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 240px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #333;
    text-decoration: none;
}

.history-item:hover {
    background: #F5F5F5;
}

.history-item.official {
    color: #128C7E;
}

.history-item.unofficial {
    color: #DC3545;
}

.history-item-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.history-item.official .history-item-icon {
    background: #DCF8C6;
    color: #128C7E;
}

.history-item.unofficial .history-item-icon {
    background: #FFE6E6;
    color: #DC3545;
}

.history-empty {
    color: #666;
    font-size: 13px;
    text-align: center;
    padding: 20px 0;
    font-style: italic;
}

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

.profile-pic {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.header-text h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 2px;
}

.status {
    font-size: 13px;
    opacity: 0.8;
}

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg) var(--spacing-md) 80px;
    background: #0D8075 url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    
    /* Melhor scroll para acessibilidade */
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
    
    &::-webkit-scrollbar {
        width: 8px;
    }
    
    &::-webkit-scrollbar-track {
        background: transparent;
    }
    
    &::-webkit-scrollbar-thumb {
        background-color: var(--primary);
        border-radius: 20px;
        border: 2px solid var(--bg-secondary);
    }
}

.message {
    margin-bottom: 15px;
    display: flex;
    animation: slideIn 0.3s ease-out;
    position: relative;
}

@keyframes floatEmoji {
    0% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.2); }
    100% { transform: translateY(-40px) scale(0.8); opacity: 0; }
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.floating-emoji {
    position: absolute;
    top: 0;
    right: 10px;
    font-size: 24px;
    pointer-events: none;
    animation: floatEmoji 1s ease-out forwards;
}

.message.verified .message-bubble {
    animation: popIn 0.4s ease-out;
}

.message.warning .message-bubble {
    animation: shake 0.4s ease-in-out;
}

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

.message.bot {
    justify-content: flex-start;
}

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

.message-bubble {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.4;
    word-wrap: break-word;
    position: relative;
}

.message.bot .message-bubble {
    background: #E8E8E8;
    border-bottom-left-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    color: #000000;
}

.message.user .message-bubble {
    background: #DCF8C6;
    border-bottom-right-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    color: #000000;
}

.message-time {
    font-size: 11px;
    color: #999;
    margin-top: 5px;
    text-align: right;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    background: #FFFFFF;
    border-radius: 18px;
    border-bottom-left-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    margin-bottom: 15px;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #999;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.chat-input-container {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    background: #F0F0F0;
    padding: 10px 15px;
    border-top: 1px solid #E0E0E0;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #FFFFFF;
    border-radius: 25px;
    padding: 8px 15px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: relative;
}

.input-status {
    position: absolute;
    right: 65px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
}

.input-status.show {
    opacity: 1;
    transform: scale(1);
}

.input-status.valid {
    background: #DCF8C6;
    color: #128C7E;
}

.input-status.invalid {
    background: #FFE6E6;
    color: #DC3545;
}

.input-status svg {
    width: 16px;
    height: 16px;
}

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

.input-status.show {
    animation: popIn 0.3s ease forwards;
}

#messageInput {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    padding: 8px 0;
    background: transparent;
}

#messageInput::placeholder {
    color: #999;
}

.send-btn {
    background: #128C7E;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: background 0.2s;
}

.send-btn:hover {
    background: #075E54;
}

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

.official-numbers {
    background: #FFF3CD;
    border: 1px solid #FFEAA7;
    border-radius: 8px;
    padding: 10px;
    margin: 8px 0;
    font-size: 13px;
}

.warning-box {
    background: #F8D7DA;
    border: 1px solid #F5C6CB;
    border-radius: 8px;
    padding: 10px;
    margin: 8px 0;
    font-size: 13px;
}

.success-box {
    background: #D4EDDA;
    border: 1px solid #C3E6CB;
    border-radius: 8px;
    padding: 10px;
    margin: 8px 0;
    font-size: 13px;
}

@media (max-width: 500px) {
    .chat-container {
        max-width: 100%;
        height: 100vh;
    }
    
    .chat-input-container {
        max-width: 100%;
    }
    
    .message-bubble {
        max-width: 90%;
    }
}

@media (max-height: 600px) {
    .chat-messages {
        padding-bottom: 70px;
    }
}

.message-bubble a {
    color: #128C7E !important;
    text-decoration: underline;
    font-weight: bold;
    transition: all 0.2s ease;
}

.message-bubble a:hover {
    color: #075E54 !important;
    background: rgba(18, 140, 126, 0.1);
    padding: 2px 4px;
    border-radius: 4px;
}

.message-bubble a:active {
    transform: scale(0.98);
}