/* @budding */
/* --- 全局与主题样式 --- */
        :root {
            --bg-color: #fce4ec;
            --primary-color: #ff80ab;
            --secondary-color: #f48fb1;
            --accent-color: #90caf9;
            --text-color: #444;
            --white-color: #fff;
            --border-radius: 18px;
            --phone-corner-radius: 0px;
            --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --top-pinned-bg: #fff0f5;
            --online-status-color: #4CAF50;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-family);
            margin: 0;
            padding: 0;
            background: linear-gradient(135deg, #fce4ec, #f8bbd0);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
        }

        .phone-screen {
            width: 100%;
            max-width: 420px;
            height: 100vh;
            max-height: 850px;
            background-color: var(--white-color);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            border-radius: var(--phone-corner-radius);
            overflow: hidden;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .screen {
            display: none;
            flex-direction: column;
            width: 100%;
            height: 100%;
            animation: fadeIn 0.5s ease;
        }

        .screen.active {
            display: flex;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: scale(0.95);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .app-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 20px;
            background-color: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #eee;
            flex-shrink: 0;
            position: relative;
            z-index: 10;
        }

        .app-header .back-btn,
        .app-header .action-btn {
            background: none;
            border: none;
            font-size: 24px;
            font-weight: bold;
            color: var(--primary-color);
            cursor: pointer;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        #cancel-multi-select-btn {
            font-size: 14px !important;
            font-weight: 500 !important;
            color: var(--white-color) !important;
            background-color: var(--primary-color) !important;
            border-radius: 10px !important;
            padding: 5px 10px !important;
            width: auto !important;
            height: auto !important;
        }

        .app-header .action-btn-group {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .app-header .action-btn-group .action-btn {
            font-size: 16px;
            font-weight: 600;
            width: auto;
            padding: 6px 12px;
            border-radius: 10px;
        }

        .app-header .action-btn-group #create-group-btn {
            background-color: var(--primary-color);
            color: var(--white-color);
        }

        .app-header .action-btn-group #add-chat-btn {
            font-size: 28px;
            padding: 0;
            width: 40px;
            height: 40px;
            background-color: transparent;
            color: var(--primary-color);
            border-radius: 50%;
        }

        .app-header .action-btn img {
            width: 28px;
            height: 28px;
        }

        .app-header .title-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }

        .app-header .title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-color);
            margin: 0;
        }

        .app-header .subtitle {
            font-size: 12px;
            color: #888;
            display: flex;
            align-items: center;
            margin-top: 2px;
        }

        .online-indicator {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--online-status-color);
            margin-right: 5px;
        }

        .app-header .placeholder {
            width: 40px;
        }

        #home-screen {
            justify-content: space-between;
            background-size: cover;
            background-position: center;
            transition: background-image 0.5s ease-in-out;
            padding: 50px 0;
        }

        .time-widget {
            text-align: center;
            padding: 0 20px;
            color: var(--text-color);
        }

        .time-widget .time {
            font-size: 72px;
            font-weight: 600;
        }

        .time-widget .date {
            font-size: 18px;
            color: #666;
        }

        #home-screen.day-mode .time-widget,
        #home-screen.day-mode .time-widget .date,
        #home-screen.day-mode .app-icon .app-name {
            color: var(--white-color);
            text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
        }

        .app-grid {
            width: 100%;
            padding: 20px 40px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            justify-content: center;
            align-content: center;
            margin-top: 40px;
        }

        #home-screen.day-mode .time-widget,
        #home-screen.day-mode .time-widget .date,
        #home-screen.day-mode .app-icon .app-name {
            color: var(--white-color);
            text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
        }

        .dock {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 10px;
            background-color: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            margin: 0 20px;
            min-height: 80px;
            gap: 15px;
        }

        .app-icon {
            display: flex;
            flex-direction: column;
            align-items: center;
            cursor: pointer;
            text-decoration: none;
        }

        .icon-img {
            width: 60px;
            height: 60px;
            border-radius: 15px;
            margin-bottom: 8px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            transition: transform 0.2s ease;
            object-fit: cover;
        }

        .app-icon:hover .icon-img {
            transform: translateY(-5px);
        }

        .app-icon .app-name {
            font-size: 12px;
            color: var(--text-color);
            font-weight: 500;
        }

        .content {
            flex-grow: 1;
            overflow-y: auto;
            padding: 20px;
            position: relative;
        }

        .placeholder-text {
            text-align: center;
            color: #aaa;
            margin-top: 50px;
        }

        .modal-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 100;
            display: none;
            align-items: center;
            justify-content: center;
            animation: fadeIn 0.3s ease;
        }

        .modal-overlay.visible {
            display: flex;
        }

        .modal-window {
            background: var(--white-color);
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
            width: 85%;
            max-width: 340px;
            animation: slideUp 0.4s ease-out;
        }

        .modal-window h3 {
            margin-top: 0;
            text-align: center;
            color: var(--primary-color);
        }

        @keyframes slideUp {
            from {
                transform: translateY(20px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        #edit-group-member-modal,
        #create-member-for-group-modal {
            z-index: 102;
        }

        #edit-group-member-modal .avatar-preview,
        #create-member-for-group-modal .avatar-preview {
            width: 80px;
            height: 80px;
        }

        .context-menu {
            position: fixed;
            z-index: 1000;
            background: white;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
            overflow: hidden;
            padding: 5px 0;
            animation: fadeIn 0.1s ease;
        }

        .context-menu-item {
            padding: 10px 20px;
            cursor: pointer;
        }

        .context-menu-item:hover {
            background-color: #f5f5f5;
        }

        .context-menu-item.danger {
            color: #e53935;
        }

        .action-sheet-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 200;
            display: none;
            align-items: flex-end;
            animation: fadeIn 0.3s ease;
        }

        .action-sheet-overlay.visible {
            display: flex;
        }

        .action-sheet {
            background: #f7f7f7;
            width: 100%;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            padding: 10px;
            padding-bottom: calc(10px + env(safe-area-inset-bottom));
            animation: slideUp 0.3s ease-out;
        }

        .action-sheet-button {
            width: 100%;
            background: white;
            border: none;
            padding: 15px;
            font-size: 16px;
            color: var(--primary-color);
            font-weight: 500;
            cursor: pointer;
            border-radius: 10px;
            margin-bottom: 8px;
        }

        .action-sheet-button.danger {
            color: #e53935;
        }

        .action-sheet-button:last-child {
            margin-bottom: 0;
        }

        #chat-list-screen .content,
        #world-book-screen .content {
            padding: 10px 0 0 0;
        }

        .list-container {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .list-item {
            display: flex;
            align-items: center;
            padding: 10px 20px;
            cursor: pointer;
            border-bottom: 1px solid #f0f0f0;
            transition: background-color 0.2s ease;
            position: relative;
        }

        .list-item:hover {
            background-color: #fdf6f8;
        }

        .chat-item.pinned {
            background-color: var(--top-pinned-bg);
        }

        .chat-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            margin-right: 15px;
            object-fit: cover;
            flex-shrink: 0;
            background-color: #eee;
        }

        .group-avatar {
            border-radius: 10px;
        }

        .item-details {
            flex-grow: 1;
            overflow: hidden;
        }

        .item-details-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .item-name {
            font-weight: 600;
            color: var(--text-color);
            font-size: 16px;
        }

        .item-preview-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 4px;
        }

        .item-preview {
            font-size: 14px;
            color: #888;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            flex-grow: 1;
        }

        .pin-badge {
            background-color: var(--primary-color);
            color: white;
            font-size: 10px;
            font-weight: bold;
            padding: 2px 6px;
            border-radius: 5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        #chat-room-screen {
            background-size: cover;
            background-position: center;
        }

        #chat-room-screen .content {
            display: flex;
            flex-direction: column;
            padding: 10px;
            padding-bottom: 10px;
            transition: padding-bottom 0.3s ease;
        }

        #chat-room-screen.multi-select-active .content {
            padding-bottom: 70px;
        }

        .message-area {
            flex-grow: 1;
            overflow-y: auto;
            padding: 0 10px;
            scroll-behavior: smooth;
        }

        .message-wrapper {
            display: flex;
            margin-bottom: 12px;
            align-items: flex-start;
            transition: background-color 0.2s;
            flex-direction: column;
        }

        .message-wrapper.group-message {
            margin-bottom: 18px;
        }

        .message-wrapper.sent {
            align-items: flex-end;
        }

        .message-wrapper.received {
            align-items: flex-start;
        }

        .message-wrapper.system-notification {
            align-items: center;
        }

        .message-bubble-row {
            display: flex;
            width: 100%;
            align-items: flex-start;
        }

        .message-wrapper.sent .message-bubble-row {
            flex-direction: row-reverse;
        }

        .message-wrapper.multi-select-selected {
            background-color: rgba(144, 202, 249, 0.2);
            border-radius: var(--border-radius);
        }

        .message-info {
            display: flex;
            flex-direction: column;
            align-items: center;
            position: relative;
        }

        .group-nickname {
            position: absolute;
            top: -15px;
            font-size: 11px;
            color: #888;
            white-space: nowrap;
            width: 70px;
            text-align: center;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .message-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            object-fit: cover;
        }

        .message-time {
            font-size: 9px;
            color: #aaa;
            margin-top: 3px;
        }

        .message-bubble {
            max-width: 260px;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            word-wrap: break-word;
            line-height: 1.4;
            backdrop-filter: blur(5px);
            -webkit-backdrop-filter: blur(5px);
            margin: 0 8px;
            cursor: pointer;
            font-size: 15px;
        }

        .message-bubble.sent {
            border-bottom-right-radius: 5px;
        }

        .message-bubble.received {
            border-bottom-left-radius: 5px;
        }

        .system-notification-bubble {
            background-color: rgba(200, 200, 200, 0.5);
            color: #666;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 10px;
            text-align: center;
        }

        .image-bubble {
            max-width: 120px;
            border-radius: var(--border-radius);
            margin: 0 8px;
            padding: 4px;
            background-color: rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(5px);
            -webkit-backdrop-filter: blur(5px);
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }

        .image-bubble img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: calc(var(--border-radius) - 4px);
        }

        .message-wrapper.sent .image-bubble {
            border-bottom-right-radius: 5px;
        }

        .message-wrapper.received .image-bubble {
            border-bottom-left-radius: 5px;
        }

        .voice-bubble {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            backdrop-filter: blur(5px);
            -webkit-backdrop-filter: blur(5px);
            margin: 0 8px;
            cursor: pointer;
            transition: all 0.2s ease;
            min-width: 90px;
            max-width: 200px;
        }

        .message-wrapper.sent .voice-bubble {
            border-bottom-right-radius: 5px;
            flex-direction: row-reverse;
        }

        .message-wrapper.received .voice-bubble {
            border-bottom-left-radius: 5px;
        }

        .voice-bubble .play-icon {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }

        .voice-bubble .duration {
            font-size: 13px;
            margin: 0 8px;
            white-space: nowrap;
        }

        .message-wrapper.sent .play-icon {
            transform: scaleX(-1);
        }

        .voice-transcript {
            font-size: 14px;
            color: #555;
            background-color: rgba(255, 255, 255, 0.7);
            padding: 8px 12px;
            margin-top: 5px;
            margin-left: 54px;
            margin-right: 54px;
            border-radius: 10px;
            line-height: 1.6;
            max-width: calc(100% - 108px);
            display: none;
            animation: fadeIn 0.3s ease;
        }

        .voice-transcript.active {
            display: block;
        }

        .message-wrapper.sent .voice-transcript {
            align-self: flex-end;
            margin-right: 54px;
            margin-left: auto;
        }

        .message-wrapper.received .voice-transcript {
            align-self: flex-start;
            margin-left: 54px;
            margin-right: auto;
        }

        .pv-card {
            width: 230px;
            aspect-ratio: 1 / 1;
            background-color: #f0f0f0;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            position: relative;
            cursor: pointer;
            margin: 0 8px;
        }

        .message-wrapper.sent .pv-card {
            border-bottom-right-radius: 5px;
        }

        .message-wrapper.received .pv-card {
            border-bottom-left-radius: 5px;
        }

        .pv-card-image-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            transition: opacity 0.5s ease-in-out;
            z-index: 2;
        }

        .pv-card-image-overlay.hidden {
            opacity: 0;
            pointer-events: none;
        }

        .pv-card-content {
            padding: 15px;
            height: 100%;
            overflow-y: auto;
            color: var(--text-color);
            line-height: 1.6;
            font-size: 15px;
            background-color: white;
            position: relative;
            z-index: 1;
        }

        .pv-card-footer {
            background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
            color: white;
            padding: 20px 10px 8px;
            font-size: 12px;
            display: flex;
            align-items: center;
            gap: 5px;
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            z-index: 3;
            pointer-events: none;
            transition: opacity 0.5s ease-in-out;
        }

        .pv-card-footer.hidden {
            opacity: 0;
        }

        .pv-card-footer svg {
            width: 14px;
            height: 14px;
            fill: white;
            flex-shrink: 0;
        }

        .transfer-card {
            width: 240px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 0 8px;
            overflow: hidden;
            position: relative;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            color: white;
        }

        .message-wrapper.sent .transfer-card {
            border-bottom-right-radius: 5px;
        }

        .message-wrapper.received .transfer-card {
            border-bottom-left-radius: 5px;
            cursor: pointer;
        }

        .transfer-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-size: cover;
            background-position: center;
            filter: blur(4px);
            transform: scale(1.1);
            z-index: 1;
        }

        .transfer-card.sent-transfer::before {
            background-image: url('https://i.postimg.cc/sxN893WF/IMG-20250712.png');
        }

        .transfer-card.received-transfer::before {
            background-image: url('https://i.postimg.cc/FzR8LY7g/IMG-20250712-170703.png');
        }

        .transfer-card .overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.3);
            z-index: 2;
            transition: background-color 0.5s ease;
        }

        .transfer-card.received .overlay {
            background-color: rgba(255, 182, 193, 0.4);
        }

        .transfer-card.returned .overlay {
            background-color: rgba(100, 100, 100, 0.5);
        }

        .transfer-content {
            position: relative;
            z-index: 3;
            padding: 20px;
            text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
        }

        .transfer-title {
            font-size: 14px;
            margin: 0 0 5px 0;
            opacity: 0.9;
        }

        .transfer-amount {
            font-size: 28px;
            font-weight: bold;
            margin: 0;
        }

        .transfer-remark {
            font-size: 14px;
            margin-top: 10px;
            opacity: 0.9;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .transfer-status {
            font-size: 12px;
            margin-top: 15px;
            padding-top: 10px;
            border-top: 1px solid rgba(255, 255, 255, 0.3);
            opacity: 0.8;
        }

        .gift-card {
            width: 230px;
            background-color: #fff;
            border: 2px solid #333;
            border-radius: var(--border-radius);
            box-shadow: 4px 4px 0px #ddd;
            padding: 10px;
            display: flex;
            align-items: center;
            cursor: pointer;
            margin: 0 8px;
            position: relative;
            overflow: hidden;
        }

        .message-wrapper.sent .gift-card {
            border-bottom-right-radius: 5px;
        }

        .message-wrapper.received .gift-card {
            border-bottom-left-radius: 5px;
        }

        .gift-card-icon {
            width: 50px;
            height: 50px;
            margin-right: 15px;
            flex-shrink: 0;
        }

        .gift-card-text {
            font-size: 16px;
            font-weight: bold;
            color: #333;
            font-family: 'Comic Sans MS', 'Chalkduster', 'Handwriting', cursive;
        }

        .gift-card-description {
            font-size: 14px;
            color: #555;
            background-color: rgba(240, 240, 240, 0.9);
            padding: 8px 12px;
            margin-top: 5px;
            margin-left: 54px;
            margin-right: 54px;
            border-radius: 10px;
            line-height: 1.6;
            max-width: calc(100% - 108px);
            display: none;
            animation: fadeIn 0.3s ease;
        }

        .gift-card-description.active {
            display: block;
        }

        .message-wrapper.sent .gift-card-description {
            align-self: flex-end;
            margin-right: 54px;
            margin-left: auto;
        }

        .message-wrapper.received .gift-card-description {
            align-self: flex-start;
            margin-left: 54px;
            margin-right: auto;
        }

        .gift-card-received-stamp {
            position: absolute;
            top: 5px;
            right: 5px;
            font-size: 14px;
            font-weight: bold;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            border-radius: 8px;
            padding: 2px 6px;
            transform: rotate(15deg);
            opacity: 0;
            transition: opacity 0.3s ease;
            font-family: 'Comic Sans MS', 'Chalkduster', 'Handwriting', cursive;
        }

        .gift-card.received .gift-card-received-stamp {
            opacity: 1;
        }

        .load-more-btn {
            background-color: #e0e0e0;
            color: #757575;
            border: none;
            padding: 8px 16px;
            margin: 10px auto;
            border-radius: 15px;
            cursor: pointer;
            display: block;
            font-size: 13px;
            font-weight: 500;
        }

        .load-more-btn:hover {
            background-color: #d1d1d1;
        }

        .typing-indicator {
            text-align: center;
            color: #aaa;
            font-style: italic;
            font-size: 14px;
            padding: 10px 0;
            display: none;
        }

        #sticker-bar {
            flex-shrink: 0;
            padding: 0 10px 5px;
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(10px);
        }

        .sticker-bar-btn {
            background: none;
            border: none;
            padding: 5px;
            cursor: pointer;
        }

        .sticker-bar-btn svg {
            width: 28px;
            height: 28px;
            fill: #888;
        }

        #sticker-modal {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 35%;
            max-height: 250px;
            background: #f7f7f7;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.1);
            z-index: 25;
            display: none;
            flex-direction: column;
        }

        #sticker-modal.visible {
            display: flex;
            animation: slideUp 0.3s ease-out;
        }

        #sticker-modal .header {
            padding: 10px 15px;
            font-weight: bold;
            color: var(--text-color);
            border-bottom: 1px solid #eee;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .sticker-grid {
            flex-grow: 1;
            overflow-y: auto;
            padding: 15px;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
            gap: 15px;
        }

        .sticker-item {
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
            cursor: pointer;
        }

        .sticker-item img {
            width: 60px;
            height: 60px;
            object-fit: contain;
        }

        .sticker-item span {
            font-size: 12px;
            color: #666;
            margin-top: 5px;
            text-align: center;
        }

        #add-sticker-modal .modal-window {
            max-width: 360px;
        }

        #sticker-preview {
            width: 100px;
            height: 100px;
            border: 2px dashed #ddd;
            border-radius: 10px;
            margin: 0 auto 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #aaa;
            background-color: #f9f9f9;
        }

        #sticker-preview img {
            max-width: 100%;
            max-height: 100%;
        }

        .chat-input-wrapper {
            flex-shrink: 0;
        }

        .message-input-area {
            display: flex;
            align-items: center;
            padding: 10px;
            padding-bottom: calc(10px + env(safe-area-inset-bottom));
            border-top: 1px solid #eee;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(10px);
            flex-shrink: 0;
            gap: 10px;
            border-bottom-left-radius: var(--phone-corner-radius);
            border-bottom-right-radius: var(--phone-corner-radius);
            overflow: hidden;
        }

        .message-input-area input {
            flex-grow: 1;
            border: none;
            padding: 12px;
            border-radius: 18px;
            background-color: #f0f0f0;
        }

        .message-input-area input:focus {
            outline: none;
        }

        .message-input-area .icon-btn {
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.2s;
        }

        .message-input-area .icon-btn:disabled {
            background-color: #cccccc;
            cursor: not-allowed;
        }

        .message-input-area .icon-btn svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .message-input-area .icon-btn.send-btn {
            font-size: 18px;
        }

        #multi-select-bar {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            display: none;
            justify-content: space-between;
            align-items: center;
            padding: 10px 20px;
            padding-bottom: calc(10px + env(safe-area-inset-bottom));
            border-top: 1px solid #eee;
            z-index: 20;
            border-bottom-left-radius: var(--phone-corner-radius);
            border-bottom-right-radius: var(--phone-corner-radius);
            animation: slideUp 0.3s ease-out;
        }

        #multi-select-bar.visible {
            display: flex;
        }

        .settings-sidebar {
            position: absolute;
            top: 0;
            right: -100%;
            width: 80%;
            height: 100%;
            background: #fff;
            box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
            transition: right 0.4s ease-in-out;
            z-index: 101;
            display: flex;
            flex-direction: column;
        }

        .settings-sidebar.open {
            right: 0;
        }

        .settings-sidebar .header {
            padding: 15px;
            border-bottom: 1px solid #eee;
            font-weight: bold;
            text-align: center;
            color: var(--primary-color);
        }

        .settings-sidebar .content {
            padding: 20px;
            overflow-y: auto;
            flex-grow: 1;
        }

        .settings-sidebar .form-group textarea {
            height: 100px;
            resize: vertical;
        }

        .settings-sidebar .avatar-setting {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .settings-sidebar .avatar-preview {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--primary-color);
            cursor: pointer;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--secondary-color);
            font-weight: 600;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #fce4ec;
            border-radius: 10px;
            background-color: #fff;
            transition: border-color 0.3s;
            font-family: var(--font-family);
            font-size: 14px;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }

        .form-group.radio-group {
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .form-group.radio-group label {
            margin-bottom: 0;
        }

        .btn {
            width: 100%;
            padding: 15px;
            border-radius: 10px;
            border: none;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            text-align: center;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: var(--white-color);
        }

        .btn-primary:hover {
            background-color: var(--secondary-color);
            box-shadow: 0 4px 15px rgba(255, 128, 171, 0.5);
        }

        label.btn-primary {
            color: var(--white-color) !important;
        }

        .btn-small {
            padding: 8px 16px;
            font-size: 14px;
            width: auto;
        }

        .btn-secondary {
            background-color: var(--accent-color);
            color: var(--white-color);
            margin-bottom: 15px;
        }

        .btn-secondary:hover {
            background-color: #64b5f6;
            box-shadow: 0 4px 15px rgba(144, 202, 249, 0.5);
        }

        .btn-neutral {
            background-color: #bdbdbd;
            color: var(--white-color);
        }

        .btn-neutral:hover {
            background-color: #9e9e9e;
        }

        .btn-danger {
            background-color: #ef5350;
            color: white;
        }

        .btn .spinner {
            display: none;
            width: 16px;
            height: 16px;
            border: 2px solid rgba(255, 255, 255, 0.5);
            border-top-color: var(--white-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        .btn.loading .spinner {
            display: block;
        }

        .btn.loading .btn-text {
            display: none;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .wallpaper-preview {
            width: 100%;
            aspect-ratio: 9 / 16;
            max-height: 400px;
            border-radius: var(--border-radius);
            margin-bottom: 25px;
            background-size: cover;
            background-position: center;
            border: 3px dashed var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary-color);
            font-style: italic;
            background-color: #fff8fa;
        }

        .toast {
            position: absolute;
            bottom: 80px;
            left: 50%;
            transform: translateX(-50%);
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 10px 20px;
            border-radius: 15px;
            font-size: 14px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.5s, visibility 0.5s;
            z-index: 1000;
        }

        .toast.show {
            opacity: 1;
            visibility: visible;
        }

        #world-book-selection-modal,
        #invite-member-modal,
        #group-recipient-selection-modal {
            z-index: 102;
        }

        #world-book-selection-modal .modal-window,
        #invite-member-modal .modal-window,
        #group-recipient-selection-modal .modal-window {
            width: 90%;
            max-width: 380px;
        }

        #world-book-selection-list,
        #invite-member-selection-list,
        #group-recipient-selection-list {
            list-style: none;
            padding: 0;
            margin: 0;
            max-height: 40vh;
            overflow-y: auto;
        }

        .world-book-select-item,
        .invite-member-select-item,
        .group-recipient-select-item {
            display: flex;
            align-items: center;
            padding: 12px 5px;
            border-bottom: 1px solid #f0f0f0;
        }

        .world-book-select-item:last-child,
        .invite-member-select-item:last-child,
        .group-recipient-select-item:last-child {
            border-bottom: none;
        }

        .world-book-select-item input[type="checkbox"],
        .invite-member-select-item input[type="checkbox"],
        .group-recipient-select-item input[type="checkbox"] {
            margin-right: 15px;
            width: 20px;
            height: 20px;
        }

        .world-book-select-item label,
        .invite-member-select-item label,
        .group-recipient-select-item label {
            font-weight: 500;
            color: var(--text-color);
            display: flex;
            align-items: center;
            gap: 10px;
            width: 100%;
        }

        .invite-member-select-item img,
        .group-recipient-select-item img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
        }

        /* --- Group Chat Specific Styles --- */
        .member-selection-list {
            list-style: none;
            padding: 0;
            margin: 15px 0;
            max-height: 40vh;
            overflow-y: auto;
        }

        .member-selection-item {
            display: flex;
            align-items: center;
            padding: 10px 5px;
            border-bottom: 1px solid #f0f0f0;
        }

        .member-selection-item:last-child {
            border-bottom: none;
        }

        .member-selection-item input[type="checkbox"] {
            margin-right: 15px;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }

        .member-selection-item img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 10px;
        }

        .member-selection-item label {
            font-weight: 500;
            color: var(--text-color);
        }

        #group-settings-sidebar .group-avatar-setting {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        #group-settings-sidebar .group-avatar-preview {
            width: 60px;
            height: 60px;
            border-radius: 10px;
            object-fit: cover;
            border: 2px solid var(--primary-color);
            cursor: pointer;
        }

        #group-settings-sidebar .group-members-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
            gap: 15px;
            margin-top: 10px;
        }

        #group-settings-sidebar .group-member,
        #group-settings-sidebar .add-member-btn {
            display: flex;
            flex-direction: column;
            align-items: center;
            cursor: pointer;
        }

        #group-settings-sidebar .group-member img {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 5px;
            border: 2px solid #eee;
        }

        #group-settings-sidebar .add-member-btn .add-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            border: 2px dashed #ccc;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #ccc;
            margin-bottom: 5px;
            transition: all 0.2s ease;
        }

        #group-settings-sidebar .add-member-btn:hover .add-icon {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }

        #group-settings-sidebar .group-member span,
        #group-settings-sidebar .add-member-btn span {
            font-size: 12px;
            text-align: center;
            color: var(--text-color);
        }

        #customize-screen .icon-custom-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid #f0f0f0;
        }

        #customize-screen .icon-custom-item:last-child {
            border-bottom: none;
        }

        #customize-screen .icon-preview {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            object-fit: cover;
            flex-shrink: 0;
        }

        #customize-screen .icon-details {
            flex-grow: 1;
        }

        #customize-screen .icon-details p {
            margin: 0 0 8px 0;
            font-weight: 600;
        }

        #customize-screen .icon-details input {
            width: calc(100% - 70px);
        }

        #customize-screen .reset-icon-btn {
            background: #e0e0e0;
            color: #555;
            border: none;
            border-radius: 8px;
            padding: 8px 10px;
            font-size: 12px;
            cursor: pointer;
            margin-left: 10px;
        }

        /* --- Tutorial Screen Styles --- */
        .tutorial-item {
            margin-bottom: 15px;
            border: 1px solid #fce4ec;
            border-radius: 12px;
            overflow: hidden;
            background-color: #fff8fa;
        }

        .tutorial-header {
            padding: 12px 18px;
            font-weight: 600;
            color: var(--secondary-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .tutorial-header::after {
            content: '▼';
            font-size: 12px;
            transition: transform 0.3s ease;
        }

        .tutorial-item.open .tutorial-header::after {
            transform: rotate(180deg);
        }

        .tutorial-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease-in-out, padding 0.5s ease;
            padding: 0 10px;
        }

        .tutorial-item.open .tutorial-content {
            padding: 10px 10px;
            /* A large value to ensure it expands to fit the content */
            max-height: 5000px;
        }

        .tutorial-content img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            display: block;
        }
/* @budding */
.icon-grid-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    justify-content: flex-start;
    width: 100%;
}
#customize-form {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
}
.icon-grid-item {
    width: 33.333%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 0;
    cursor: pointer;
    box-sizing: border-box;
}
.icon-grid-item:active {
    opacity: 0.6;
}
.icon-grid-img {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    object-fit: cover;
    margin-bottom: 8px;
}
.icon-grid-name {
    font-size: 12px;
    color: #888;
    text-align: center;
}