/* frontend/css/chat.css */

/* Панель выбора области поиска (направления/коллекции) над полем ввода */
.chat-scope-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.scope-picker {
    position: relative;
    flex: 0 0 auto;
}

.scope-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: var(--bg-glass);
    color: var(--text-secondary);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.scope-trigger:hover,
.scope-trigger.is-open {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.scope-trigger-label {
    font-weight: 500;
}

.scope-trigger-value {
    color: var(--text-muted);
}

.scope-trigger-value.is-active {
    color: var(--accent-primary);
    font-weight: 600;
}

.scope-caret {
    font-size: 0.7rem;
    transition: transform 0.2s ease;
}

.scope-trigger.is-open .scope-caret {
    transform: rotate(180deg);
}

/* Выпадающая панель со списком коллекций */
.scope-panel {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 0;
    z-index: 60;
    width: 19rem;
    max-width: min(19rem, calc(100vw - 2rem));
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    overflow: hidden;
    animation: scopePanelIn 0.14s ease-out;
}

.scope-panel[hidden] {
    display: none;
}

@keyframes scopePanelIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.scope-panel-search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-muted);
}

.scope-panel-search input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
}

.scope-options {
    max-height: 15rem;
    overflow-y: auto;
    padding: 0.35rem;
}

.scope-option {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.6rem;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.87rem;
    transition: background 0.15s ease;
}

.scope-option:hover {
    background: var(--bg-glass);
}

.scope-option input {
    accent-color: var(--accent-primary);
    width: 1rem;
    height: 1rem;
    flex: 0 0 auto;
    margin: 0;
    cursor: pointer;
}

.scope-option-name {
    overflow-wrap: anywhere;
}

.scope-empty {
    margin: 0;
    padding: 1rem 0.75rem;
    text-align: center;
    font-size: 0.83rem;
    color: var(--text-secondary);
}

.scope-panel-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    border-top: 1px solid var(--border-light);
}

.scope-foot-hint {
    font-size: 0.72rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

.scope-clear {
    background: transparent;
    border: none;
    color: var(--accent-primary);
    font-size: 0.78rem;
    cursor: pointer;
    padding: 0.2rem 0.35rem;
    border-radius: 6px;
}

.scope-clear:hover {
    background: var(--bg-glass);
}

/* Чипы выбранных коллекций рядом с кнопкой */
.scope-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    min-width: 0;
}

.scope-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.3rem 0.2rem 0.6rem;
    border-radius: 999px;
    background: rgba(99, 102, 241, 0.14);
    border: 1px solid rgba(99, 102, 241, 0.35);
    color: var(--text-primary);
    font-size: 0.76rem;
    max-width: 12rem;
}

.scope-chip button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.95rem;
    line-height: 1;
    padding: 0 0.2rem;
    border-radius: 50%;
}

.scope-chip button:hover {
    color: var(--text-primary);
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.chat-header h2 {
    min-width: 0;
    overflow-wrap: anywhere;
}

.chat-actions {
    display: flex;
    gap: 0.5rem;
    flex: 0 0 auto;
}

.feedback-row {
    margin-top: 0.5rem;
}
.feedback-row .btn-feedback {
    font-size: 0.8rem;
    padding: 0.25rem 0.6rem;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.welcome-message {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.welcome-card {
    text-align: center;
    max-width: 400px;
    padding: 2rem;
}

.ai-avatar {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.welcome-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.welcome-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.suggestions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.suggestion-chip {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
    background: var(--bg-glass);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.suggestion-chip:hover {
    background: var(--bg-glass-hover);
    border-color: var(--accent-primary);
}

.chat-input-container {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-light);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 0.6rem 0.75rem;
    backdrop-filter: blur(20px);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

#message-input {
    /* Потолок авто-роста; JS читает эту переменную (см. Chat.autoResizeTextarea). */
    --chat-input-max: 260px;
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    resize: none;
    outline: none;
    max-height: var(--chat-input-max);
    min-height: 1.5rem;
    line-height: 1.5;
    padding: 0.35rem 0;
    overflow-y: hidden;
    scrollbar-width: thin;
}

#message-input::placeholder {
    color: var(--text-muted);
}

.chat-input-hint {
    margin: 0.4rem 0.25rem 0;
    font-size: 0.72rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

.send-btn {
    background: var(--accent-gradient);
    border: none;
    border-radius: 12px;
    width: 40px;
    height: 40px;
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.send-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Messages */
.message {
    margin-bottom: 1.5rem;
    animation: messageSlide 0.3s ease-out;
}

@keyframes messageSlide {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.assistant-message {
    display: flex;
    justify-content: flex-start;
}

.message-bubble {
    max-width: 70%;
    padding: 1rem 1.25rem;
    border-radius: 18px;
    position: relative;
}

.message-bubble.user {
    background: var(--accent-gradient);
    color: white;
    border-bottom-right-radius: 4px;
}

.message-bubble.assistant {
    background: var(--bg-glass);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-content {
    line-height: 1.5;
}

.message-content strong { font-weight: 600; }
.message-content em { font-style: italic; }
.message-content code {
    background: rgba(255,255,255,0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.875em;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-top: 0.5rem;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.typing-dots {
    display: flex;
    gap: 0.25rem;
}

.dot {
    width: 6px;
    height: 6px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

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

.message-sources {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.source-chip {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 12px;
    padding: 0.25rem 0.75rem;
    font-size: 0.85em;
}

[data-theme="light"] .source-chip {
    background: #e0e0e0;
    border-color: #ccc;
    color: #333;
}

/* === Мобильная версия чата === */
@media (max-width: 992px) {
    /* Прокручивается только лента сообщений — заголовок сверху и поле ввода
       снизу остаются на месте, а не уезжают за пределы экрана. */
    #chat-section.content-section {
        overflow: hidden;
        padding-bottom: 0.75rem;
    }

    .chat-messages {
        min-height: 0;
        gap: 1rem;
        padding: 0.5rem 0;
    }

    .chat-header {
        margin-bottom: 1rem;
        gap: 0.5rem;
    }

    .chat-header h2 {
        font-size: 1.15rem;
        line-height: 1.25;
    }

    .chat-actions .btn-secondary {
        padding: 0.45rem 0.6rem;
    }

    .message {
        margin-bottom: 0.75rem;
    }

    .message-bubble {
        max-width: 88%;
        padding: 0.75rem 0.9rem;
        border-radius: 14px;
    }

    /* Приветственный экран не должен растягивать ленту на всю высоту */
    .welcome-message {
        height: auto;
        padding: 1rem 0;
    }

    .welcome-card {
        padding: 1rem 0.5rem;
    }

    .ai-avatar {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .welcome-card h3 {
        font-size: 1.05rem;
    }

    .welcome-card p {
        font-size: 0.88rem;
        margin-bottom: 1rem;
    }

    .chat-input-container {
        padding-top: 0.75rem;
    }

    #message-input {
        /* Только px: значение читает JS через parseInt (Chat.autoResizeTextarea). */
        --chat-input-max: 160px;
        font-size: 16px; /* iOS не зумит поле при фокусе только от 16px */
    }

    .chat-scope-bar {
        gap: 0.4rem;
        margin-bottom: 0.5rem;
    }

    /* Панель коллекций во всю ширину контейнера, а не 19rem от края кнопки */
    .scope-picker {
        flex: 1 1 auto;
        min-width: 0;
    }

    .scope-trigger {
        width: 100%;
        justify-content: flex-start;
    }

    .scope-panel {
        width: auto;
        max-width: none;
        left: 0;
        right: 0;
    }

    .scope-chips {
        width: 100%;
    }

    .chat-input-hint {
        display: none;
    }
}