/* 1. DÉFINITION DES COULEURS (Variables) */
:root {
    /* Valeurs par défaut : MODE CLAIR */
    --bg-main: #ffffff;
    --bg-ai-message: #f7f7f8;
    --bg-user-message: #ffffff;
    --text-main: #374151;
    --border-color: rgba(0,0,0,0.1);
    --input-bg: #ffffff;
    --input-border: rgba(0, 0, 0, 0.24);
    --input-shadow: rgba(0,0,0,0.05);
    --input-text: #374151;
    --avatar-user: #7c3aed;
    --avatar-ai: #10a37f;
    --scroll-thumb: #c5c5d2;
}

/* 2. MODE SOMBRE (S'active automatiquement selon le système) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-main: #343541;
        --bg-ai-message: #444654;
        --bg-user-message: #343541;
        --text-main: #ececf1;
        --border-color: rgba(0,0,0,0.1);
        --input-bg: #40414f;
        --input-border: rgba(32,33,35,0.5);
        --input-shadow: rgba(0,0,0,0.2);
        --input-text: #ffffff;
        --scroll-thumb: #565869;
    }
}

/* 3. BASE DU DOCUMENT */
body {
    font-family: 'Söhne', 'ui-sans-serif', 'system-ui', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    margin: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    transition: background-color 0.3s ease;
}

#chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

/* Zone des messages */
#messages-box {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 150px;
    background-color: var(--bg-main);
    scroll-behavior: smooth;
}

/* Scrollbar Style */
#messages-box::-webkit-scrollbar { width: 8px; }
#messages-box::-webkit-scrollbar-thumb {
    background-color: var(--scroll-thumb);
    border-radius: 10px;
}

/* 4. DESIGN DES MESSAGES */
.message {
    width: 100%;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    padding: 24px 0;
}

.user-message { background-color: var(--bg-user-message); }
.ai-message { background-color: var(--bg-ai-message); }

.message-content {
    display: flex;
    gap: 20px;
    width: 100%;
    max-width: 48rem;
    padding: 0 20px;
}

/* Avatars */
.avatar {
    width: 30px;
    height: 30px;
    min-width: 30px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    color: white;
}
.user-message .avatar { background-color: var(--avatar-user); }
.ai-message .avatar { background-color: var(--avatar-ai); }

/* Texte */
.text {
    flex-grow: 1;
    font-size: 16px;
    line-height: 1.6;
    overflow-wrap: break-word;
}

/* 5. ZONE DE SAISIE (FLOTTANTE) */
#input-area {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    /* Gradient pour masquer les messages qui passent dessous */
    background: linear-gradient(180deg, transparent, var(--bg-main) 50%);
    padding: 20px 0 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.input-wrapper {
    position: relative;
    width: 90%;
    max-width: 48rem;
    background-color: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 12px;
    box-shadow: 0 0 15px var(--input-shadow);
    display: flex;
    align-items: center;
}

#user-input {
    width: 100%;
    background: transparent;
    border: none;
    padding: 14px 45px 14px 16px;
    color: var(--input-text);
    font-size: 16px;
    outline: none;
}

#send-button {
    position: absolute;
    right: 10px;
    background: transparent;
    border: none;
    color: #acacbe;
    cursor: pointer;
    padding: 5px;
    transition: all 0.2s;
}

#send-button:hover:not(:disabled) {
    background-color: var(--border-color);
    color: var(--text-main);
}

/* Markdown Specifics */
.ai-markdown pre {
    background-color: #000000;
    color: #ffffff;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
}

.model-toggle-btn {
    padding: 8px 16px;
    background-color: #444;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    margin: 10px;
}

.model-toggle-btn:hover {
    background-color: #555;
}

.model-toggle-btn:active {
    background-color: #666;
}