/* ========================================================
   chat.css — Chat area, messages, input, media, menus
   ======================================================== */

/* ─── Chat area ─── */
.chat {
    flex: 1; overflow-y: auto; padding: 20px 24px;
    display: flex; flex-direction: column; gap: 10px;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: #333 transparent;
}
.chat::-webkit-scrollbar { width: 6px; }
.chat::-webkit-scrollbar-track { background: transparent; }
.chat::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
.chat::-webkit-scrollbar-thumb:hover { background: #444; }

/* ─── Chat links ─── */
.chat-link {
    color: var(--blue);
    text-decoration: underline;
    text-underline-offset: 2px;
    word-break: break-all;
    transition: opacity 0.2s;
}
.chat-link:hover { opacity: 0.8; }
.message.user .chat-link { color: #fff; text-decoration-color: rgba(255,255,255,0.6); }
.post-text .chat-link { color: var(--blue); }

/* ─── Message styles ─── */
.message {
    max-width: 75%; padding: 12px 16px; border-radius: var(--radius);
    font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word;
    animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.message.user {
    align-self: flex-end; background: var(--accent); color: white;
    border-bottom-right-radius: 4px;
}
.message.assistant {
    align-self: flex-start; background: var(--bg-card); color: var(--text-primary);
    border-bottom-left-radius: 4px; border: 1px solid var(--border);
}
.message.assistant.streaming { border-color: var(--blue); box-shadow: 0 0 12px var(--blue-glow); }
.message.system {
    align-self: center; background: transparent; color: var(--text-muted);
    font-size: 12px; padding: 6px 12px;
}
.message.error {
    align-self: center; background: var(--red-bg); color: var(--red);
    border: 1px solid #7f1d1d; font-size: 13px;
}
.message.key-data {
    align-self: flex-start; background: var(--green-bg); border: 1px solid var(--green-border);
    color: var(--green); font-family: inherit;
    font-size: 14px; max-width: 420px; padding: 16px 18px; white-space: normal;
}
.message.key-data .key-title {
    font-weight: 600; font-size: 13px; margin-bottom: 10px; display: block;
}
.key-download-btn {
    display: flex; align-items: center; gap: 12px; width: 100%;
    margin: 6px 0; padding: 12px 16px;
    background: rgba(22,101,52,0.25); border: 1px solid var(--green-border);
    border-radius: var(--radius-xs); cursor: pointer;
    transition: all var(--transition); color: var(--green);
    font-family: inherit; font-size: 14px; font-weight: 500; text-align: left;
}
.key-download-btn:hover { background: rgba(22,101,52,0.45); border-color: var(--green); transform: translateY(-1px); }
.key-download-btn:active { transform: translateY(0); }
.key-download-btn .dl-icon {
    width: 36px; height: 36px; min-width: 36px; border-radius: 10px;
    background: rgba(22,101,52,0.4); display: flex; align-items: center; justify-content: center;
}
.key-download-btn .dl-info { flex: 1; }
.key-download-btn .dl-name { font-weight: 600; font-size: 14px; }
.key-download-btn .dl-hint { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
.key-copy-btn {
    display: flex; align-items: center; gap: 12px; width: 100%;
    margin: 6px 0; padding: 12px 16px;
    background: rgba(22,101,52,0.25); border: 1px solid var(--green-border);
    border-radius: var(--radius-xs); cursor: pointer;
    transition: all var(--transition); color: var(--green);
    font-family: inherit; font-size: 14px; font-weight: 500; text-align: left;
}
.key-copy-btn:hover { background: rgba(22,101,52,0.45); border-color: var(--green); transform: translateY(-1px); }
.key-copy-btn:active { transform: translateY(0); }
.key-copy-btn .dl-icon {
    width: 36px; height: 36px; min-width: 36px; border-radius: 10px;
    background: rgba(22,101,52,0.4); display: flex; align-items: center; justify-content: center;
}
.key-copy-btn .dl-info { flex: 1; }
.key-copy-btn .dl-name { font-weight: 600; font-size: 14px; }
.key-copy-btn .dl-hint { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* Admin reply (support) */
.message.admin-reply {
    align-self: flex-start; background: var(--bg-card); color: var(--text-primary);
    border-bottom-left-radius: 4px; border: 1px solid var(--border);
    border-left: 3px solid var(--blue);
}
.message.admin-reply::before {
    content: 'Поддержка'; display: block; font-size: 11px;
    color: var(--blue); margin-bottom: 4px; font-weight: 600;
}

/* History date separator */
.message.history-sep {
    align-self: center; background: transparent; color: var(--text-muted);
    font-size: 11px; padding: 4px 10px;
}

/* Typing indicator */
.message.typing {
    align-self: flex-start; background: var(--bg-card); color: var(--text-secondary);
    border: 1px solid var(--border); font-size: 13px;
}
.message.typing::after {
    content: ''; display: inline-block; width: 4px; height: 4px;
    background: var(--blue); border-radius: 50%; margin-left: 6px;
    animation: blink 1s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.2; } }

/* ─── Inline buttons — standalone block in chat ─── */
.inline-buttons {
    align-self: stretch; display: flex; flex-direction: column; gap: 8px;
    padding: 14px 18px; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); max-width: 100%; animation: fadeIn 0.2s ease;
}
.inline-buttons .btn-row {
    display: grid; gap: 8px;
    grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 500px) {
    .inline-buttons .btn-row { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
}
.inline-buttons .btn-action {
    background: var(--accent); color: white; border: none;
    padding: 10px 14px; border-radius: var(--radius-xs); cursor: pointer;
    font-size: 13px; font-weight: 500; font-family: inherit; transition: all var(--transition);
    text-align: center; word-break: break-word;
}
.inline-buttons .btn-action:hover { background: var(--accent-hover); transform: translateY(-1px); }
.inline-buttons .btn-action:active { transform: translateY(0); }
.inline-buttons .btn-link {
    background: var(--bg-input); color: var(--blue); text-decoration: none;
    padding: 10px 14px; border-radius: var(--radius-xs); font-size: 13px;
    font-family: inherit; display: block; transition: all var(--transition);
    border: 1px solid var(--border); text-align: center;
    word-break: break-word;
}
.inline-buttons .btn-link:hover { background: var(--bg-hover); border-color: var(--blue); }

/* ─── Menu wrapper & toggle ─── */
.menu-wrapper {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}
.menu-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 8px;
    background: linear-gradient(135deg, rgba(59,130,246,0.12), rgba(147,51,234,0.10));
    border: none;
    color: var(--blue);
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: menuPulse 2.5s ease-in-out infinite;
}
/* Shimmer removed — too distracting per UX audit */
@keyframes menuPulse {
    0%, 100% { background: linear-gradient(135deg, rgba(59,130,246,0.12), rgba(147,51,234,0.10)); }
    50% { background: linear-gradient(135deg, rgba(59,130,246,0.22), rgba(147,51,234,0.18)); }
}
.menu-toggle:hover {
    color: var(--blue);
    background: linear-gradient(135deg, rgba(59,130,246,0.25), rgba(147,51,234,0.20));
    animation: none;
}
.menu-toggle.open { animation: none; }
.menu-toggle-icon { transition: transform 0.3s ease; }
.menu-toggle.open .menu-toggle-icon { transform: rotate(180deg); }

/* ─── Main menu — responsive grid ─── */
.main-menu {
    background: var(--bg-secondary); padding: 12px 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    flex-shrink: 0;
}
.main-menu.collapsed {
    max-height: 0;
    overflow: hidden;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.3s ease;
}
.main-menu.expanded {
    max-height: 300px;
    opacity: 1;
    transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.3s ease;
}
.main-menu button {
    background: var(--bg-input); color: var(--text-primary);
    border: 1px solid var(--border); padding: 10px 8px;
    border-radius: var(--radius-sm); cursor: pointer;
    font-size: 13px; font-family: inherit; font-weight: 500;
    transition: all var(--transition);
    text-align: center; word-break: break-word;
}
.main-menu button:hover { border-color: var(--blue); background: var(--bg-hover); color: var(--blue); }
.main-menu button:disabled { opacity: 0.4; cursor: not-allowed; }
@media (max-width: 800px) {
    .main-menu { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 500px) {
    .main-menu { grid-template-columns: repeat(2, 1fr); }
}

/* ─── Input area ─── */
.input-area {
    background: var(--bg-secondary); padding: 14px 24px;
    padding-bottom: max(14px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    display: flex; gap: 10px; flex-shrink: 0;
}
.input-area input {
    flex: 1; min-width: 0; background: var(--bg-input); border: 1px solid var(--border);
    color: var(--text-primary); padding: 12px 18px; border-radius: var(--radius-sm);
    font-size: 14px; font-family: inherit; transition: border-color var(--transition);
}
.input-area input:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 3px var(--blue-glow); }
.input-area input::placeholder { color: var(--text-muted); }
.input-area button {
    background: var(--blue); color: white; border: none;
    padding: 12px 24px; border-radius: var(--radius-sm); cursor: pointer;
    font-size: 14px; font-weight: 600; font-family: inherit;
    transition: all var(--transition); white-space: nowrap;
    flex-shrink: 0;
}
.input-area button:hover { background: var(--blue-hover); }
.input-area button:disabled { background: #333; color: #555; cursor: not-allowed; }
.input-area button svg { vertical-align: middle; }

/* ─── Media in chat ─── */
.message.has-media { white-space: normal; }
.message .media-preview {
    max-width: 260px; max-height: 200px; border-radius: 8px;
    cursor: pointer; margin: 4px 0; display: block;
    object-fit: cover; border: 1px solid rgba(255,255,255,0.15);
}
.message.user .media-preview { border-color: rgba(255,255,255,0.25); }
.message .media-preview:hover { opacity: 0.85; }
.message .media-text { margin-top: 6px; white-space: pre-wrap; }
.message .media-placeholder {
    display: flex; align-items: center; gap: 8px;
    padding: 10px 14px; margin: 4px 0;
    background: rgba(0,0,0,0.15); border: 1px dashed rgba(255,255,255,0.2);
    border-radius: var(--radius-xs); color: rgba(255,255,255,0.6); font-size: 13px;
}
.message.admin-reply .media-placeholder {
    background: rgba(255,255,255,0.04); border-color: var(--border);
    color: var(--text-muted);
}
.message .file-attachment {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px; margin: 4px 0;
    background: rgba(255,255,255,0.06); border: 1px solid var(--border);
    border-radius: var(--radius-xs); cursor: pointer;
    text-decoration: none; color: inherit; transition: all var(--transition);
}
.message.user .file-attachment { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.2); }
.message .file-attachment:hover { background: rgba(255,255,255,0.1); border-color: var(--blue); }
.message .file-icon {
    width: 36px; height: 36px; min-width: 36px; border-radius: 8px;
    background: var(--bg-input); display: flex;
    align-items: center; justify-content: center; font-size: 18px;
}
.message.user .file-icon { background: rgba(255,255,255,0.15); }
.message .file-info { flex: 1; min-width: 0; }
.message .file-name {
    font-size: 13px; font-weight: 500;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.message .file-size { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
.message.user .file-size { color: rgba(255,255,255,0.7); }

/* ─── Attach button ─── */
.input-area .attach-btn {
    background: var(--bg-input); color: var(--text-secondary);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 8px 12px; cursor: pointer; display: flex;
    align-items: center; justify-content: center;
    transition: all var(--transition); flex-shrink: 0;
}
.input-area .attach-btn:hover { border-color: var(--blue); color: var(--blue); }
.input-area .attach-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ─── Upload preview ─── */
.upload-preview-strip {
    display: none; padding: 8px 24px;
    background: var(--bg-secondary); border-top: 1px solid var(--border);
}
.upload-preview-strip.visible { display: flex; align-items: center; gap: 10px; }
.upload-preview-strip .preview-thumb {
    width: 48px; height: 48px; border-radius: 6px;
    object-fit: cover; border: 1px solid var(--border);
}
.upload-preview-strip .preview-file-icon {
    width: 48px; height: 48px; border-radius: 6px;
    background: var(--bg-input); display: flex;
    align-items: center; justify-content: center; font-size: 20px;
}
.upload-preview-strip .preview-info { flex: 1; min-width: 0; }
.upload-preview-strip .preview-name {
    font-size: 13px; font-weight: 500;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.upload-preview-strip .preview-size { font-size: 11px; color: var(--text-muted); }
.upload-preview-strip .preview-remove {
    background: none; border: none; color: var(--red); cursor: pointer;
    font-size: 18px; padding: 4px 8px;
}

/* ─── TrustTunnel credentials card ─── */
.tt-credentials-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    width: 100%;
}
.tt-title {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 12px;
    color: var(--text);
}
.tt-fields {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.tt-field {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-input);
    border-radius: 8px;
    border: 1px solid var(--border);
}
.tt-label {
    font-size: 13px;
    color: var(--text-muted);
    flex-shrink: 0;
    margin-right: 12px;
}
.tt-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    font-family: 'Courier New', monospace;
    word-break: break-all;
    text-align: right;
}
.tt-copyable {
    cursor: pointer;
    transition: color 0.2s;
}
.tt-copyable:hover {
    color: var(--blue);
}
.tt-copyable.copied {
    color: var(--green);
}
.tt-hint {
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}