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

:root {
    --bg-primary: #1a1d29;
    --bg-secondary: #252836;
    --bg-tertiary: #2d3142;
    --text-primary: #e4e6eb;
    --text-secondary: #b0b3b8;
    --accent: #5865f2;
    --accent-hover: #4752c4;
    --success: #43b581;
    --error: #f04747;
    --border: #3a3f52;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    font-size: 1rem;
    transition: all 0.2s;
}

.tab-btn.active {
    background: var(--accent);
    color: white;
}

.auth-form {
    display: none;
}

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

.auth-form h2 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.auth-form input {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--accent);
}

.auth-form button {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.auth-form button:hover {
    background: var(--accent-hover);
}

.error-message {
    color: var(--error);
    margin-top: 1rem;
    text-align: center;
    min-height: 1.5rem;
    display: none;
    padding: 0.5rem;
    background: rgba(240, 71, 71, 0.1);
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Chat App */
.chat-app {
    display: flex;
    height: 100vh;
}

.chat-app.hidden {
    display: none;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.logout-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.channels-section {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.icon-btn {
    width: 24px;
    height: 24px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.icon-btn:hover {
    background: var(--accent-hover);
}

.servers-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.server-item {
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.server-item:hover {
    background: var(--bg-primary);
}

.server-item.active {
    background: var(--accent);
    color: white;
}

.channels-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-height: 200px;
}

.channel-group {
    margin-top: 0.5rem;
}

.channel-group-header {
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    user-select: none;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.channel-group-header:hover {
    background: var(--bg-primary);
}

.channel-group.dragging .channel-group-header {
    opacity: 0.5;
}

.channel-group-toggle {
    font-size: 0.7rem;
    color: var(--text-secondary);
    transition: transform 0.2s;
    cursor: pointer;
    user-select: none;
}

.channel-group-name {
    font-size: 0.75rem;
    color: var(--text-secondary);
    flex: 1;
}

.drag-indent-indicator {
    transition: all 0.2s;
}

.channel-item {
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.channel-item:hover {
    background: var(--bg-primary);
}

.channel-item.active {
    background: var(--accent);
}

.channel-item.dragging {
    opacity: 0.5;
}

.channel-item-name {
    font-weight: 500;
}

.channel-item[data-indent-level="1"] {
    font-size: 0.85rem;
    opacity: 0.9;
    padding-left: 2rem;
}

.channel-item[data-indent-level="1"] .channel-item-name::before {
    content: "└ ";
    margin-right: 4px;
    opacity: 0.6;
}

.channel-item-joined {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.channel-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.channel-header {
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.channel-header > div:first-child {
    flex: 1;
}

.channel-header h2 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.typing-indicator {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    min-height: 1.2rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.typing-indicator.active {
    opacity: 1;
}

.online-users {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-right: 0.75rem;
    display: none;
}

.channel-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-secondary {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: var(--bg-primary);
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 0;
    max-width: 100%;
    box-sizing: border-box;
}

.message-input-container {
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform: translateY(0);
    opacity: 1;
}

.message-input-container.hidden {
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.5rem 0;
    min-width: 0;
    max-width: 100%;
    overflow-wrap: break-word;
    word-break: break-word;
}

.message-header {
    display: flex;
    gap: 0.5rem;
    align-items: baseline;
    position: relative;
}

.message-author {
    font-weight: 600;
    color: var(--accent);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.message-actions {
    display: flex;
    gap: 4px;
    margin-left: auto;
    opacity: 0;
    transition: opacity 0.2s;
}

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

.edit-message-btn,
.delete-message-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
    transition: transform 0.2s;
}

.edit-message-btn:hover {
    transform: scale(1.1);
}

.delete-message-btn:hover {
    transform: scale(1.1);
    filter: brightness(1.2);
}

.edited-badge {
    color: var(--text-secondary);
    font-size: 0.85em;
    font-style: italic;
    margin-left: 4px;
}

.message-edit-input {
    width: 100%;
    min-height: 60px;
    padding: 8px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    resize: vertical;
    background: var(--bg);
    color: var(--text);
}

.message-edit-actions {
    margin-top: 8px;
    display: flex;
    gap: 8px;
}

.edit-save-btn,
.edit-cancel-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.edit-save-btn {
    background-color: var(--accent);
    color: white;
}

.edit-save-btn:hover {
    opacity: 0.9;
}

.edit-cancel-btn {
    background-color: var(--border);
    color: var(--text);
}

.edit-cancel-btn:hover {
    background-color: var(--text-secondary);
}

/* Loading and Reconnecting Indicators */
.loading-indicator,
.reconnecting-indicator {
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin: 10px;
}

.loading-content,
.reconnecting-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.message-content {
    color: var(--text-primary);
    line-height: 1.5;
    word-wrap: break-word;
    word-break: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    white-space: pre-wrap;
}

/* Markdown styles */
.message-content strong {
    font-weight: 600;
}

.message-content em {
    font-style: italic;
}

.message-content del {
    text-decoration: line-through;
    opacity: 0.8;
}

.message-content u {
    text-decoration: underline;
}

.message-content code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--accent);
}

.message-content pre {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 0.5rem 0;
    border-left: 3px solid var(--accent);
}

.message-content pre code {
    background: transparent;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.9em;
}

.message-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 0.5rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.message-content blockquote.multi-line {
    background: var(--bg-tertiary);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin: 0.5rem 0;
}

.message-content ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
}

.message-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
    transition: opacity 0.2s;
}

.message-content a:hover {
    opacity: 0.8;
}

.message-content .spoiler {
    background: var(--bg-tertiary);
    color: var(--bg-tertiary);
    cursor: pointer;
    user-select: none;
    border-radius: 3px;
    padding: 0 0.2rem;
    transition: all 0.2s;
}

.message-content .spoiler:hover {
    background: var(--bg-primary);
}

.message-content .spoiler.revealed {
    background: transparent;
    color: var(--text-primary);
    cursor: default;
    user-select: text;
}

/* Text colors */
.message-content .text-color {
    font-weight: 500;
}

.message-content .text-color-red {
    color: #ef4444;
}

.message-content .text-color-orange {
    color: #f97316;
}

.message-content .text-color-yellow {
    color: #eab308;
}

.message-content .text-color-green {
    color: #22c55e;
}

.message-content .text-color-blue {
    color: #3b82f6;
}

.message-content .text-color-purple {
    color: #a855f7;
}

.message-content .text-color-pink {
    color: #ec4899;
}

.message-content .text-color-cyan {
    color: #06b6d4;
}

/* Images */
.message-content .message-image {
    max-width: 300px;
    width: auto;
    height: auto;
    border-radius: 6px;
    margin: 0.5rem 0;
    display: block;
    cursor: pointer;
    transition: transform 0.2s;
}

.message-content .message-image:hover {
    transform: scale(1.02);
}

.message-content .message-image.image-url {
    border: 1px solid var(--border);
}

.message-content .message-image.image-base64 {
    border: 1px solid var(--accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Link previews */
.message-content .link-preview-container {
    margin: 0.75rem 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-tertiary);
    transition: transform 0.2s, box-shadow 0.2s;
    max-width: 500px;
}

.message-content .link-preview-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.message-content .link-preview-content {
    display: flex;
    flex-direction: row;
    align-items: stretch;
}

.message-content .link-preview-image {
    flex-shrink: 0;
    width: 150px;
    min-height: 100px;
    background: var(--bg-primary);
    overflow: hidden;
}

.message-content .link-preview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content .link-preview-text {
    flex: 1;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.message-content .link-preview-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.4;
}

.message-content .link-preview-description {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.message-content .link-preview-url {
    color: var(--accent);
    font-size: 0.75rem;
    margin-top: auto;
    word-break: break-all;
}

.message-content .link-preview {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
    transition: opacity 0.2s;
}

.message-content .link-preview:hover {
    opacity: 0.8;
}


.message-input-container {
    position: relative;
}

.markdown-toolbar {
    display: flex;
    gap: 0.25rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.markdown-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem 0.6rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
}

.markdown-btn:hover:not(:disabled) {
    background: var(--bg-primary);
    border-color: var(--accent);
    transform: translateY(-1px);
}

.markdown-btn:active:not(:disabled) {
    transform: translateY(0);
}

.markdown-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.markdown-btn strong {
    font-weight: 700;
}

.markdown-btn em {
    font-style: italic;
}

.markdown-btn code {
    background: transparent;
    padding: 0;
    font-size: 0.85rem;
    color: var(--accent);
}

.markdown-separator {
    width: 1px;
    height: 20px;
    background: var(--border);
    margin: 0 0.25rem;
}

.color-picker-container {
    position: relative;
}

.color-picker-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.color-picker-btn:hover:not(:disabled) {
    background: var(--bg-primary);
    border-color: var(--accent);
}

.color-picker-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.color-picker {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 100;
}

.color-picker.hidden {
    display: none;
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
}

.color-option:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    border-color: var(--text-primary);
}

.message-input-container form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.message-input-container input {
    flex: 1;
    min-width: 0;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    max-width: calc(100% - 120px);
}

.message-input-container input:focus {
    outline: none;
    border-color: var(--accent);
}

.message-input-container input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.message-input-container button {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    flex-shrink: 0;
    white-space: nowrap;
}

.message-input-container button:hover:not(:disabled) {
    background: var(--accent-hover);
}

.message-input-container button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.modal-buttons {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.modal-buttons button {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-buttons button[type="submit"] {
    background: var(--accent);
    color: white;
}

.modal-buttons button[type="submit"]:hover {
    background: var(--accent-hover);
}

.modal-buttons button[type="button"] {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-buttons button[type="button"]:hover {
    background: var(--bg-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

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