* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    height: 100vh;
    overflow: hidden;
}
.hidden { display: none !important; }


.auth-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: #f0f2f5;
    display: flex; justify-content: center; align-items: center;
    z-index: 9999;
}
.auth-box {
    background: white; padding: 40px 30px; border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    width: 100%; max-width: 360px; text-align: center;
}
.auth-logo img { width: 70px; border-radius: 16px; margin-bottom: 15px; }
#auth-title { margin-bottom: 20px; font-size: 22px; }
.auth-box input, .pref-select {
    width: 100%; padding: 14px; margin: 8px 0;
    border: 1px solid #ddd; border-radius: 12px;
    background: #fafafa; outline: none; font-size: 15px;
}
.auth-box input:focus, .pref-select:focus { border-color: #1ABC9C; background: #fff; }
.primary-btn {
    width: 100%; padding: 14px; background: #1ABC9C; color: white;
    border: none; border-radius: 12px; font-size: 16px; font-weight: 600;
    cursor: pointer; margin-top: 15px; transition: 0.2s;
}
.primary-btn:hover { background: #16a085; }
.forgot-link { font-size: 13px; color: #1ABC9C; cursor: pointer; margin: 5px 0 10px; text-align: right; }
#switch-action { color: #1ABC9C; cursor: pointer; font-weight: 600; }
.error-text { color: #e74c3c; font-size: 13px; margin-top: 15px; }


.modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); z-index: 5000;
    display: flex; justify-content: center; align-items: center;
}
.modal-content {
    background: white; width: 320px; border-radius: 20px;
    padding: 30px; position: relative; text-align: center;
}
.close-modal { position: absolute; top: 15px; right: 20px; font-size: 24px; cursor: pointer; color: #aaa; }
.avatar-circle { width: 70px; height: 70px; background: #e0f2f1; border-radius: 50%; margin: 0 auto 15px; }
.logout-btn-large {
    width: 100%; padding: 12px; margin-top: 25px;
    background: #fff5f5; color: #e74c3c; border: none; border-radius: 12px; cursor: pointer; font-weight: 600;
}

.app-wrapper { display: flex; width: 100vw; height: 100vh; }


.sidebar {
    width: 260px; background: #ffffff; border-right: 1px solid #e0e0e0;
    display: flex; flex-direction: column; z-index: 1000; transition: transform 0.3s;
}
.sidebar-header { padding: 20px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid #f0f0f0; }
.sidebar-logo { width: 32px; border-radius: 8px; }
.sidebar-title { font-weight: bold; font-size: 18px; }
.close-btn { background: none; border: none; font-size: 24px; cursor: pointer; margin-left: auto; }

.sidebar-content { padding: 20px; flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; }
.sidebar-btn {
    width: 100%; padding: 12px 15px; background: transparent; border: none;
    border-radius: 10px; text-align: left; font-size: 15px; cursor: pointer;
    display: flex; align-items: center; gap: 12px; color: #555;
}
.sidebar-btn:hover { background: #f5f5f5; }
.sidebar-btn.primary-action { background: #1ABC9C; color: white; font-weight: 600; }
.sidebar-divider { height: 1px; background: #eee; margin: 10px 0; }

.streak-box {
    display: flex; align-items: center; gap: 10px; padding: 12px 15px;
    background: #fff5e6; border-radius: 10px; border: 1px solid #ffe0b2; margin-top: 10px;
}
.streak-text { font-weight: 600; color: #e67e22; font-size: 14px;}

.sidebar-user-info { padding: 12px 15px; background: #fafafa; border-radius: 10px; border: 1px solid #eee; margin-top: 5px; }
.info-row { display: flex; justify-content: space-between; align-items: center; }
.info-row .label { font-size: 14px; color: #555; }
.tag { background: #eee; padding: 4px 10px; border-radius: 12px; font-size: 12px; font-weight: 700; color: #666; display: inline-block; }
.tag.pro { background: linear-gradient(135deg, #1ABC9C, #3498db); color: white; }

.dropdown-container { position: relative; }
.lang-dropdown { background: white; border: 1px solid #eee; border-radius: 10px; padding: 5px; margin-top: 5px; }
.lang-option { padding: 10px; font-size: 14px; cursor: pointer; border-radius: 6px; }
.lang-option:hover { background: #f0f2f5; }

/* ГЛАВНЫЙ КОНТЕЙНЕР */
.main-container { flex: 1; display: flex; flex-direction: column; background: #ffffff; position: relative; }
.top-bar { padding: 15px 20px; display: flex; align-items: center; border-bottom: 1px solid #f0f0f0; }
.burger-btn { background: none; border: none; cursor: pointer; color: #555; display: none; }
.burger-btn svg { width: 26px; height: 26px; }

.welcome-box { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 20px; }
.welcome-box.minimized { display: none; }
.logo-wrapper { width: 80px; margin-bottom: 20px; }
.logo { width: 100%; border-radius: 20px; }
.highlight { color: #1ABC9C; }


.chat-box { flex: 1; padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 15px; max-width: 800px; margin: 0 auto; width: 100%; }
.message-wrapper { display: flex; flex-direction: column; width: 100%; }
.message { 
    padding: 12px 16px; 
    max-width: 85%; 
    line-height: 1.5; 
    font-size: 15px; 
    word-wrap: break-word; 
    position: relative;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.user-msg { 
    background: #1ABC9C; 
    color: white; 
    align-self: flex-end; 
    border-radius: 18px 18px 0 18px; 
}
.user-msg::after {
    content: ""; position: absolute; bottom: 0; right: -8px;
    width: 8px; height: 16px;
    background-color: #1ABC9C;
    border-bottom-right-radius: 16px;
    z-index: 1;
}
.user-msg::before {
    content: ""; position: absolute; bottom: 0; right: -10px;
    width: 10px; height: 20px;
    background-color: #ffffff; /* Цвет фона контейнера */
    border-bottom-left-radius: 10px;
    z-index: 2;
}

.ai-msg { 
    background: #f0f2f5; 
    color: #333; 
    align-self: flex-start; 
    border-radius: 18px 18px 18px 0; 
}
.ai-msg::after {
    content: ""; position: absolute; bottom: 0; left: -8px;
    width: 8px; height: 16px;
    background-color: #f0f2f5;
    border-bottom-left-radius: 16px;
    z-index: 1;
}
.ai-msg::before {
    content: ""; position: absolute; bottom: 0; left: -10px;
    width: 10px; height: 20px;
    background-color: #ffffff; /* Цвет фона контейнера */
    border-bottom-right-radius: 10px;
    z-index: 2;
}

.ai-msg pre { background: #282c34 !important; color: #eee; padding: 12px; border-radius: 8px; overflow-x: auto; font-size: 13px; margin: 10px 0;}

/* АНИМАЦИЯ ПЕЧАТИ */
.typing-indicator {
    display: inline-flex; align-items: center; gap: 4px; padding: 4px;
}
.typing-indicator span {
    width: 6px; height: 6px; background-color: #888; border-radius: 50%;
    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); }
}


.message-actions {
    display: flex; gap: 8px; margin-top: 6px; align-self: flex-start; margin-left: 10px;
}
.action-btn {
    background: transparent; border: none; cursor: pointer; color: #888;
    padding: 6px; border-radius: 6px; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s ease;
}
.action-btn:hover { background: #e0f2f1; color: #1ABC9C; }
.action-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }


/* НИЖНЯЯ ПАНЕЛЬ И ВВОД */
.bottom-panel { background: white; border-top: 1px solid #f0f0f0; padding-bottom: 20px; max-width: 800px; margin: 0 auto; width: 100%; }

#image-preview-container { padding: 10px 20px 0; }
.preview-wrapper { position: relative; display: inline-block; }
#image-preview { height: 60px; border-radius: 8px; border: 1px solid #ddd; object-fit: cover; }
#remove-image { position: absolute; top: -8px; right: -8px; background: #ff5252; color: white; border: none; border-radius: 50%; width: 20px; height: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 14px; }

.model-selector { display: flex; gap: 10px; padding: 15px 20px 10px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.model-selector::-webkit-scrollbar { display: none; }
.model-btn { background: #f5f5f5; border: none; border-radius: 20px; padding: 8px 14px; font-size: 13px; cursor: pointer; color: #666; white-space: nowrap; }
.model-btn.active { background: #e0f2f1; color: #1ABC9C; font-weight: 600; }

.input-area { padding: 5px 20px 0; display: flex; align-items: center; gap: 10px; }
#attach-btn { background: none; border: none; cursor: pointer; color: #888; padding: 5px; transition: color 0.2s; display: flex; justify-content: center; align-items: center;}
#attach-btn:hover { color: #1ABC9C; }
#user-input { flex: 1; padding: 14px 20px; border-radius: 25px; border: 1px solid #eee; background: #f9f9f9; font-size: 16px; outline: none; }
#user-input:focus { border-color: #1ABC9C; background: white; }
#send-btn { width: 46px; height: 46px; border-radius: 50%; background: #1ABC9C; border: none; color: white; display: flex; justify-content: center; align-items: center; cursor: pointer; flex-shrink: 0; }
#send-btn svg { width: 20px; height: 20px; }



.mobile-only { display: none; }
@media (max-width: 768px) {
    .burger-btn { display: block; }
    .mobile-only { display: block; }
    .top-bar-title { flex: 1; text-align: center; font-weight: bold; font-size: 16px; margin-right: 26px; }
    
    .sidebar { position: fixed; left: 0; top: 0; bottom: 0; transform: translateX(-100%); width: 280px; }
    .sidebar.open { transform: translateX(0); }
    
    .sidebar-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 999; }
    .sidebar-overlay.open { display: block !important; }

    /* Оптимизация инпутов на мобилках */
    .input-area { padding: 10px 15px; gap: 8px; }
    #user-input { font-size: 15px; padding: 12px 16px; }
    #send-btn { width: 40px; height: 40px; }
    .model-selector { padding: 10px 15px 5px; }
    .model-btn { padding: 6px 12px; font-size: 12px; }
    
    /* Сообщения в чате на мобилках */
    .chat-box { padding: 15px; }
    .message { max-width: 90%; font-size: 14px; }
}