/* public/css/style.css - Estilo Material Design Responsivo para o Chat Kronx AI */

/* 1. Importações e Variáveis Globais */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons');

:root {
    --primary-color: #6200EE; /* Roxo Material */
    --primary-variant: #3700B3;
    --secondary-color: #03DAC6; /* Ciano Material */
    --background-color: #121212; /* Fundo Dark */
    --surface-color: #1E1E1E; /* Cor de cartões e superfícies */
    --on-primary-color: #FFFFFF;
    --on-surface-color: #E0E0E0;
    --on-surface-variant: #BDBDBD;
    --error-color: #CF6679;

    --gradient-start: #4e54c8;
    --gradient-end: #8f94fb;
    
    --font-family: 'Roboto', sans-serif;
}

/* 2. Reset e Estilos Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--on-surface-color);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
}


/* 3. Layout Principal (Auth) */
.main-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

/* 4. Estilo de Cartão (Material Card) */
.card {
    background-color: var(--surface-color);
    border-radius: 8px;
    padding: 32px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px; /* Espaçamento geral entre elementos */
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
}
.card-subtitle {
    font-size: 14px;
    color: var(--on-surface-variant);
    text-align: center;
    margin-top: -12px;
    margin-bottom: 16px;
}

.form-title {
    font-size: 20px;
    font-weight: 500;
    text-align: center;
    margin-bottom: 16px;
}


/* 5. Formulários (Inputs, Botões) */
.form-group {
    position: relative;
    margin-bottom: 16px;
}

.form-input {
    width: 100%;
    padding: 12px 0 8px 0;
    border: none;
    border-bottom: 1px solid var(--on-surface-variant);
    background-color: transparent;
    color: var(--on-surface-color);
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-input:focus {
    border-bottom: 2px solid var(--primary-color);
}

.form-label {
    position: absolute;
    top: 12px;
    left: 0;
    font-size: 16px;
    color: var(--on-surface-variant);
    pointer-events: none;
    transition: all 0.3s ease;
}

.form-input:focus ~ .form-label,
.form-input:not(:placeholder-shown) ~ .form-label {
    top: -10px;
    font-size: 12px;
    color: var(--primary-color);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--on-surface-variant);
    margin-top: 8px;
    margin-bottom: 24px;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    color: var(--on-primary-color);
    cursor: pointer;
    text-transform: uppercase;
    transition: box-shadow 0.3s ease, transform 0.1s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.btn-gradient {
    background: linear-gradient(45deg, var(--gradient-end), var(--gradient-start));
}

.form-footer {
    text-align: center;
    font-size: 14px;
    margin-top: 24px;
}

.error-message {
    color: var(--error-color);
    background-color: rgba(207, 102, 121, 0.1);
    padding: 12px;
    border-radius: 4px;
    text-align: center;
    font-size: 14px;
    margin-bottom: 16px;
}

/* 6. Layout do Chat */
.chat-container {
    display: flex;
    flex-direction: row;
    width: 100vw;
    height: 100vh;
    max-width: none;
    padding: 0;
}

.sidebar {
    width: 300px;
    background-color: var(--surface-color);
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    transition: left 0.3s ease-in-out;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.sidebar-title {
    font-size: 18px;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--on-surface-variant);
    cursor: pointer;
    border-radius: 50%;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--on-surface-color);
}

#logout-btn { color: var(--on-surface-variant); }
#logout-btn:hover { color: var(--error-color); }


.conversation-list {
    flex-grow: 1;
    overflow-y: auto;
    list-style: none;
}
.conversation-list:empty::before {
    content: "Nenhuma conversa encontrada.";
    display: block;
    padding: 20px;
    text-align: center;
    color: var(--on-surface-variant);
}


.conversation-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    cursor: pointer;
    transition: background-color 0.2s;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    gap: 8px;
}

.conversation-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}
.conversation-item.active {
    background-color: var(--primary-variant);
}

.convo-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
}

.btn-delete-convo {
    color: var(--on-surface-variant);
    opacity: 0.5;
}
.conversation-item:hover .btn-delete-convo {
    opacity: 1;
}
.btn-delete-convo:hover {
    color: var(--error-color);
}


.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    padding: 0 16px;
    height: 65px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}
#chat-title {
    font-size: 18px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


.message-area {
    flex-grow: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 70%;
    line-height: 1.5;
    word-wrap: break-word;
}

.message.user {
    background-image: linear-gradient(45deg, var(--gradient-end), var(--gradient-start));
    color: var(--on-primary-color);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message.ai {
    background-color: var(--surface-color);
    box-shadow: 0 1px 2px rgba(0,0,0,0.3);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message.loading {
    align-self: flex-start;
}
.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--on-surface-variant);
    margin: 0 2px;
    animation: bounce 1.4s infinite ease-in-out both;
}
.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }
@keyframes bounce { 0%, 80%, 100% { transform: scale(0); } 40% { transform: scale(1.0); } }

.input-area {
    display: flex;
    padding: 16px;
    gap: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    align-items: center;
}

#message-input {
    flex-grow: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 24px;
    background-color: #333;
    color: var(--on-surface-color);
    font-size: 16px;
    outline: none;
}
#send-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    padding: 0;
    flex-shrink: 0;
}


/* 7. Responsividade */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.overlay.active {
    display: block;
    opacity: 1;
}


@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -300px;
        top: 0;
        bottom: 0;
        z-index: 1000;
    }
    .sidebar.open {
        left: 0;
        box-shadow: 4px 0 15px rgba(0,0,0,0.5);
    }
    
    #menu-btn { display: flex; }
    #close-menu-btn { display: flex; }
}

@media (min-width: 769px) {
    #menu-btn, #close-menu-btn {
        display: none;
    }
}