:root {
    --primary: #6C5CE7;
    --secondary: #A8A5E6;
    --background: #F8F9FA;
    --text: #2D3436;
    --success: #00B894;
    --error: #D63031;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --card-bg: #FFFFFF;
    --border: #eee;
    --hover: #e2deff;
    --word: #202020;
}

[data-theme="dark"] {
    --primary: #7C4DFF;
    --background: #1A1A1A;
    --text: #FFFFFF;
    --card-bg: #2D2D2D;
    --border: #404040;
    --hover: #3A3A3A;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    background: var(--background);
    color: var(--text);
    height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--card-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.new-chat-btn {
    margin: 1rem;
    padding: 0.75rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 1rem;
    list-style: none;
}

.chat-item {
    padding: 0.75rem;
    margin: 0.25rem 0;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--background);
    transition: all 0.2s;
}

.chat-item:hover {
    background: var(--hover);
}

.delete-btn {
    background: none;
    border: none;
    color: var(--error);
    cursor: pointer;
    padding: 4px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.chat-history {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Messages */
.message {
    max-width: 70%;
    padding: 1rem;
    border-radius: var(--radius);
    margin: 0.5rem 0;
    transition: background 0.3s;
    scroll-margin-bottom: 100px; /* Espaço para o formulário */
}

.user-message {
    background: var(--card-bg);
    align-self: flex-end;
    box-shadow: var(--shadow);
}

.system-message {
    background: var(--primary);
    color: white;
    align-self: flex-start;
}

/* Form */
.message-form {
    padding: 1rem;
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.message-input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    resize: none;
    background: var(--background);
    color: var(--text);
    min-height: 50px;
    transition: all 0.3s;
    overflow-y: auto;
    max-height: 120px;
}

.sentiment-select {
    padding: 8px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--background);
    color: var(--text);
    height: 40px;
    width: 160px;
    font-size: 0.9rem;
    cursor: pointer;
    background-position: right 8px center; /* Ajuste na posição */
    background-size: 16px;
    padding-right: 35px; /* Aumento do padding para compensar */
}

.send-btn {
    padding: 8px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    height: 40px;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: background 0.2s;
}

.send-btn:hover {
    background: #5B4ACB;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 0.5rem;
    right: 2rem;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    z-index: 1000;
    transition: background 0.2s;
}

.theme-toggle:hover {
    background: #5B4ACB;
}

/* Scroll Button */
.scroll-bottom {
    position: absolute;
    bottom: 7rem;
    right: 2rem;
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    z-index: 100;
    transition: background 0.2s;
}

.scroll-bottom:hover{
    background: #5B4ACB;
}

.message {
    max-width: 85%;
    min-width: 30%;
    word-break: break-word;
}

.system-message {
    margin-right: 15px; /* Evita colar nas bordas */
}

.user-message {
    margin-left: 15px; /* Evita colar nas bordas */
}

.message p {
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: pre-wrap;
    word-break: break-word;
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: 40vh;
    }


    .sentiment-select,
    .send-btn {
        width: 100%;
        height: 50px; /* Altura uniforme */
        font-size: 1rem; /* Tamanho de fonte igual */
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .scroll-bottom {
        bottom: 190px;
        z-index: 1000;
        right: 1rem;
    }

 
    .message {
        max-width: 85%;
        max-height: none;
        overflow: visible;
    }

    .main-content {
        padding: 0 1rem;
        margin-top: 1rem;
    }

    .message-form {
        height: auto;
        min-height: 140px;
        padding: 1rem;
        gap: 0.8rem;
    }
 /* Garante espaço para a última mensagem */
 .system-message:last-child {
    margin-bottom: 120px;
 }
}

/* mensagens interativas */
.message-input::placeholder {
    color: var(--text);
    opacity: 0.6;
  }
  
  .system-message small {
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0.9;
  }
  
  .system-message small img {
    width: 18px;
    height: 18px;
  }
  
  .chat-item[data-active="true"] {
    background: var(--primary);
    color: white;
  }
  
  .chat-item[data-active="true"] .delete-btn {
    color: white;
  }

  /* Mobile Header */
.mobile-header {
    display: none;
    padding: 1rem;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.app-name {
    font-weight: 600;
    color: var(--primary);
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Sidebar */
.sidebar.mobile-active {
    transform: translateY(0);
}

.sidebar-footer {
    margin-top: auto;
    padding: 1rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

.copyright {
    font-size: 0.75rem;
    color: var(--text);
    opacity: 0.6;
    margin-top: 0.5rem;
}


/* mínimo mobile */
@media (min-width: 769px) {
    .theme-toggle {
      display: none;
    }

    .mobile-theme-toggle {
        display: block;
        margin: 1rem;
        padding: 0.5rem 1rem;
        background: var(--primary);
        color: white;
        border: none;
        border-radius: var(--radius);
        cursor: pointer;
        transition: background 0.2s;
      }
    
      .mobile-theme-toggle:hover {
        background: #5B4ACB;
      }
  }

  /* máximo mobile */
@media (max-width: 768px) {
    .theme-toggle {
        display: none;
    }

    .mobile-header {
        display: block;
    }

    .mobile-theme-toggle {
        display: block;
        position: fixed; /* Mantém o botão fixo na tela */
        bottom: 180px; /* Ajuste esta valor conforme necessário para ficar acima do copyright */
        left: 50%; /* Centraliza horizontalmente */
        transform: translateX(-50%); /* Ajusta o posicionamento para centro exato */
        margin: 0;
        padding: 0.5rem 1.5rem;
        background: var(--primary);
        color: white;
        border: none;
        border-radius: var(--radius);
        cursor: pointer;
        transition: background 0.2s;
        z-index: 1000; /* Garante que fique acima de outros elementos */
        font-size: 0.9rem; /* Opcional para melhor ajuste em mobile */
        white-space: nowrap; /* Evita quebra de texto */
    }

    .sidebar.mobile-active .mobile-theme-toggle {
        display: block;
    }

    .sidebar {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        height: calc(100vh - 64px);
        transform: translateY(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 999;
        border-right: none;
        padding-bottom: 80px; /* Espaço para o botão do tema */
    }

    .app-container {
        padding-top: 64px;
    }

    .main-content {
        padding: 1rem;
        margin-top: 2rem;
    }

    .chat-history {
        padding: 1rem 0;
        padding-bottom: 200px; 
        margin-top: 0.5rem;
        scroll-behavior: smooth;
        overscroll-behavior: contain;
    }

    .message-form {
        flex-direction: column;
        gap: 12px; /* Espaçamento entre elementos */
        justify-content: center;
        padding: 1.2rem;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--card-bg);
        box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
        min-height: 160px; 
        align-items: stretch;
    }

    .message-input {
        width: 100%;
        order: 1;
        min-height: 100px; 
        padding: 1rem; /* Espaçamento interno maior */
        font-size: 1rem; 
    }

    .sentiment-select {
        width: 50% !important; 
        max-width: 250px; /* Largura máxima */
        height: 45px !important; 
        margin: 0 auto; /* Centralização horizontal */
        font-size: 0.9rem; 
        background-position: right 8px center; 
        padding: 10px 30px 10px 15px !important;
    }

     /* Alinhamento das opções no dropdown */
     .sentiment-select option {
        width: 100%;
        max-width: 250px;
        margin: 0 auto;
        text-align: center;
        padding: 8px;
        background: var(--background);
        direction: ltr;
    }

    .send-btn {
        width: 100%;
        order: 3;
    }

    .chat-item {
        margin: 0.5rem 0;
    }

    .scroll-bottom {
        bottom: 300px;
        right: 1rem;
    }
    
    .sidebar-footer {
        position: relative;
        bottom: auto;
        background: var(--card-bg);
        padding-bottom: 2rem;
    }
    
    .copyright {
        font-size: 0.65rem;
    }
}