:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e9ecef;
    --primary-color: #3498db;
    --primary-hover: #2980b9;
    --success-color: #27ae60;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --shadow: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #444444;
    --primary-color: #2980b9;
    --primary-hover: #3498db;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --shadow: rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    height: 100vh;
    overflow: hidden;
    transition: background 0.3s ease;
}

[data-theme="dark"] body {
    background: var(--bg-primary);
}

/* Auth Container */
.auth-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: 30px 20px;
    border-radius: 0;
    box-shadow: 0 0 0 rgba(0, 0, 0, 0);
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: all 0.3s ease;
}

.auth-tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 15px 10px;
    text-align: center;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-primary);
}

.auth-tab.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-control:focus {
    border-color: var(--primary-color);
}

.btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-hover)
    );
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.alert {
    padding: 10px 12px;
    border-radius: 6px;
    margin-bottom: 15px;
    display: none;
    font-size: 14px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Chat Container */
.chat-container {
    width: 100%;
    height: 100vh;
    background: var(--bg-primary);
    display: none;
    flex-direction: column;
    transition: background 0.3s ease;
}

/* Mobile Header */
.mobile-header {
    display: none;
    padding: 15px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
}

.mobile-title {
    font-weight: 600;
    font-size: 18px;
}

.profile-header-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.profile-header-btn:hover {
    background: var(--bg-tertiary);
}

.profile-header-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
}

.profile-header-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.chats-panel {
    width: 350px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    height: 100vh;
    transition: transform 0.3s ease;
    border-right: 1px solid var(--border-color);
}

.chats-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chats-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.chat-tab {
    flex: 1;
    padding: 15px 10px;
    text-align: center;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-primary);
}

.chat-tab.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.search-container {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    display: none;
}

.search-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    outline: none;
    font-size: 14px;
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-results {
    max-height: 300px;
    overflow-y: auto;
}

.chat-list {
    list-style: none;
    flex: 1;
    overflow-y: auto;
}

.chat-item {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.chat-item:hover {
    background: var(--bg-tertiary);
}

.chat-item.active {
    background: var(--primary-color);
    color: white;
}

.chat-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    margin-right: 12px;
    object-fit: cover;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 18px;
    flex-shrink: 0;
}

.chat-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.chat-info {
    flex: 1;
    min-width: 0;
}

.chat-username {
    font-weight: 600;
    margin-bottom: 3px;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-phone {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.chat-last-message {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.8;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    flex-shrink: 0;
    margin-left: 10px;
}

.chat-time {
    font-size: 10px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.unread-badge {
    background: var(--error-color);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
}

.chat-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    height: 100vh;
    position: relative;
}

.chat-header {
    padding: 12px 15px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
    min-height: 64px;
}

.chat-header-info {
    display: flex;
    align-items: center;
    flex: 1;
}

.back-btn {
    display: none;
    background: none;
    border: none;
    font-size: 18px;
    margin-right: 10px;
    cursor: pointer;
    color: var(--primary-color);
}

.chat-header-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
    object-fit: cover;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 16px;
    flex-shrink: 0;
}

.chat-header-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.chat-header-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
}

.chat-header-username {
    font-weight: 600;
    font-size: 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.chat-header-phone {
    font-size: 12px;
    color: var(--text-secondary);
}

.chat-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.message {
    max-width: 85%;
    margin: 8px 0;
    padding: 12px 15px;
    border-radius: 18px;
    position: relative;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    animation: fadeIn 0.3s ease;
}

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

.incoming {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    align-self: flex-start;
    border-bottom-left-radius: 5px;
    box-shadow: 0 2px 5px var(--shadow);
    color: var(--text-primary);
}

.outgoing {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-hover)
    );
    color: white;
    align-self: flex-end;
    margin-left: auto;
    border-bottom-right-radius: 5px;
    box-shadow: 0 2px 5px rgba(52, 152, 219, 0.3);
}

.message-sender {
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 4px;
    opacity: 0.8;
}

.message-content {
    margin: 6px 0;
    line-height: 1.4;
    font-size: 14px;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message-time {
    font-size: 10px;
    text-align: right;
    opacity: 0.7;
    margin-top: 4px;
}

.chat-input-container {
    position: sticky;
    bottom: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 15px;
    z-index: 10;
}

.chat-input-area {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    max-height: 120px;
}

.message-input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    outline: none;
    font-size: 14px;
    transition: border-color 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: none;
    min-height: 44px;
    max-height: 100px;
    font-family: inherit;
    line-height: 1.4;
}

.message-input:focus {
    border-color: var(--primary-color);
}

.send-button {
    padding: 12px 20px;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-hover)
    );
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    flex-shrink: 0;
    min-height: 44px;
}

.send-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.send-button:disabled {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.add-button {
    padding: 12px 20px;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-hover)
    );
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    flex-shrink: 0;
    min-height: 44px;
}

.add-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.add-button:disabled {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.system-message {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    margin: 10px 0;
    font-size: 12px;
    padding: 8px;
    background: var(--bg-secondary);
    border-radius: 10px;
    align-self: center;
    max-width: 80%;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 30px 15px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.empty-state h3 {
    margin-bottom: 8px;
    font-weight: 300;
    font-size: 16px;
}

.empty-state p {
    font-size: 14px;
}

/* Стили для кнопки удаления сообщения */
.message-actions {
    position: absolute;
    top: 5px;
    right: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.message:hover .message-actions {
    opacity: 1;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
    border-radius: 3px;
}

.delete-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--error-color);
}

/* Стили для модального окна профиля */
.profile-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.profile-modal {
    background: var(--bg-primary);
    border-radius: 15px;
    padding: 0;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin: 20px;
    overflow: hidden;
}

.profile-header {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-hover)
    );
    padding: 30px 20px;
    text-align: center;
    color: white;
    position: relative;
}

.profile-avatar-large {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 15px;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 36px;
    font-weight: 600;
    border: 4px solid white;
    position: relative;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.profile-avatar-large:hover {
    transform: scale(1.05);
}

.profile-avatar-large img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-upload-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    color: white;
    font-size: 12px;
    text-align: center;
    padding: 10px;
}

.profile-avatar-large:hover .avatar-upload-overlay {
    opacity: 1;
}

.profile-name {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 5px;
}

.profile-phone {
    font-size: 14px;
    opacity: 0.9;
}

.profile-content {
    padding: 25px;
}

.profile-section {
    margin-bottom: 25px;
}

.profile-section-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-section-title i {
    font-size: 18px;
}

.profile-info {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 15px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.info-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.info-value {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.profile-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.profile-btn {
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-btn-primary {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-hover)
    );
    color: white;
}

.profile-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.profile-btn-danger {
    background: var(--error-color);
    color: white;
}

.profile-btn-danger:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
}

.profile-btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.profile-btn-secondary:hover {
    background: var(--border-color);
}

/* Стили для скрытого input file */
.avatar-input {
    display: none;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Desktop Layout */
.desktop-layout {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* Connection status */
.connection-status {
    position: fixed;
    top: 10px;
    right: 10px;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 1000;
    transition: all 0.3s ease;
}

.connection-status.connected {
    background: var(--success-color);
    color: white;
}

.connection-status.disconnected {
    background: var(--error-color);
    color: white;
}

.connection-status.connecting {
    background: var(--warning-color);
    color: white;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .auth-container {
        max-width: 100%;
        padding: 20px;
        border-radius: 0;
    }

    .desktop-layout {
        position: relative;
        height: 100%;
    }

    .chats-panel {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        z-index: 100;
        transform: translateX(-100%);
    }

    .chats-panel.active {
        transform: translateX(0);
    }

    .chat-panel {
        width: 100%;
        height: 100vh;
    }

    .mobile-header {
        display: flex;
    }

    .back-btn {
        display: block;
    }

    .message {
        max-width: 90%;
        margin: 6px 0;
    }

    .modal {
        margin: 15px;
    }

    .modal-buttons {
        flex-direction: column;
    }

    .modal-btn {
        width: 100%;
    }

    .chat-input-container {
        padding: 10px;
        padding-bottom: max(10px, env(safe-area-inset-bottom));
    }

    .chat-input-area {
        gap: 8px;
    }

    .message-input {
        padding: 10px 12px;
        min-height: 44px;
        font-size: 16px;
    }

    .send-button {
        padding: 10px 16px;
        min-height: 44px;
        font-size: 14px;
    }

    .connection-status {
        top: 60px;
        right: 10px;
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: 15px;
    }

    .auth-tab {
        padding: 12px 8px;
        font-size: 13px;
    }

    .form-control {
        padding: 10px 12px;
        font-size: 16px;
    }

    .btn {
        padding: 12px;
    }

    .chat-header {
        padding: 10px 12px;
        min-height: 60px;
    }

    .chat-messages {
        padding: 10px;
        padding-bottom: 70px;
    }

    .message {
        padding: 10px 12px;
        max-width: 95%;
        margin: 4px 0;
    }

    .message-content {
        font-size: 14px;
    }

    .chat-input-container {
        padding: 8px;
        padding-bottom: max(8px, env(safe-area-inset-bottom));
    }

    .message-input {
        padding: 8px 12px;
        font-size: 16px;
    }

    .send-button {
        padding: 8px 14px;
        font-size: 14px;
    }

    .mobile-title {
        font-size: 16px;
    }

    .chat-header-username {
        font-size: 15px;
    }
}

/* Very small screens */
@media (max-width: 320px) {
    .chat-avatar {
        width: 40px;
        height: 40px;
        font-size: 16px;
        margin-right: 8px;
    }

    .chat-header-avatar {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }

    .chat-item {
        padding: 10px 12px;
    }

    .chat-input-area {
        gap: 6px;
    }

    .message-input {
        padding: 8px 10px;
    }

    .send-button {
        padding: 8px 12px;
        min-width: 60px;
    }
}

/* Safe area support for notches */
@supports (padding: max(0px)) {
    .chat-input-container {
        padding-bottom: max(15px, env(safe-area-inset-bottom));
    }

    @media (max-width: 768px) {
        .chat-input-container {
            padding-bottom: max(10px, env(safe-area-inset-bottom));
        }
    }

    @media (max-width: 480px) {
        .chat-input-container {
            padding-bottom: max(8px, env(safe-area-inset-bottom));
        }
    }
}

/* Prevent body scroll when modal is open */
body.modal-open {
    overflow: hidden;
}

/* Theme transition */
* {
    transition:
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease;
}

/* Ensure messages are always fully visible */
.chat-messages-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    position: relative;
}

/* Стили для модального окна удаления */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal {
    background: var(--bg-primary);
    border-radius: 10px;
    padding: 20px;
    max-width: 350px;
    width: 90%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin: 20px;
}

.modal h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 18px;
}

.modal p {
    margin-bottom: 18px;
    color: var(--text-secondary);
    font-size: 14px;
}

.modal-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.modal-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
}

.modal-btn-cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-btn-cancel:hover {
    background: var(--border-color);
}

.modal-btn-delete {
    background: var(--error-color);
    color: white;
}

.modal-btn-delete:hover {
    background: #c0392b;
}

.modal-btn-delete-for-me {
    background: var(--primary-color);
    color: white;
}

.modal-btn-delete-for-me:hover {
    background: var(--primary-hover);
}