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

:root {
    --wa-green: #00a884;
    --wa-green-dark: #008f72;
    --wa-teal: #008069;
    --wa-bg: #111b21;
    --wa-panel: #202c33;
    --wa-panel-light: #2a3942;
    --wa-border: #313d45;
    --wa-text: #e9edef;
    --wa-text-secondary: #8696a0;
    --wa-msg-out: #005c4b;
    --wa-msg-in: #202c33;
    --wa-hover: #2a3942;
    --wa-input-bg: #2a3942;
    --wa-danger: #ea4335;
    --wa-warning: #f59e0b;
}

body {
    font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
    background: var(--wa-bg);
    color: var(--wa-text);
    line-height: 1.4;
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0b141a 0%, #1f2c34 50%, #0b141a 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: var(--wa-panel);
    border-radius: 12px;
    padding: 40px 32px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    text-align: center;
}

.login-logo { margin-bottom: 16px; }

.login-box h1 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 8px;
}

.login-subtitle {
    color: var(--wa-text-secondary);
    margin-bottom: 24px;
}

.login-form { text-align: left; }

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--wa-text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--wa-input-bg);
    border: 1px solid var(--wa-border);
    border-radius: 8px;
    color: var(--wa-text);
    font-size: 1rem;
    outline: none;
}

.form-group input:focus {
    border-color: var(--wa-green);
}

.login-hint {
    margin-top: 20px;
    font-size: 0.8rem;
    color: var(--wa-text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary {
    background: var(--wa-green);
    color: #fff;
}

.btn-primary:hover { background: var(--wa-green-dark); }

.btn-secondary {
    background: var(--wa-panel-light);
    color: var(--wa-text);
}

.btn-danger { background: var(--wa-danger); color: #fff; }
.btn-warning { background: var(--wa-warning); color: #fff; }
.btn-success { background: var(--wa-green); color: #fff; }

.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(234, 67, 53, 0.15);
    border: 1px solid var(--wa-danger);
    color: #ff8a80;
}

.alert-success {
    background: rgba(0, 168, 132, 0.15);
    border: 1px solid var(--wa-green);
    color: #69f0ae;
}

/* Admin Page */
.admin-page {
    min-height: 100vh;
    background: #f0f2f5;
    color: #111;
}

.admin-header {
    background: var(--wa-teal);
    color: #fff;
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h1 { font-size: 1.3rem; font-weight: 500; }

.admin-header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}

.admin-card {
    background: #fff;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.admin-card h2 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: #333;
}

.admin-form.inline-form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.admin-form.inline-form input {
    flex: 1;
    min-width: 150px;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 0.95rem;
}

.table-wrap { overflow-x: auto; }

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
    font-size: 0.9rem;
}

.admin-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
}

.actions-cell {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.empty-cell {
    text-align: center;
    color: #999;
    padding: 32px !important;
}

.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: #d4edda; color: #155724; }
.badge-danger { background: #f8d7da; color: #721c24; }

code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden { display: none; }

.modal-content {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 420px;
    color: #333;
}

.modal-content h3 { margin-bottom: 16px; }

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

.hidden { display: none !important; }

/* Chat App Layout */
.chat-page {
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    background: var(--wa-panel);
}

/* Sidebar */
.sidebar {
    width: 400px;
    min-width: 340px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--wa-border);
    background: var(--wa-panel);
}

.sidebar-header {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    background: var(--wa-panel-light);
    gap: 12px;
}

.user-avatar,
.contact-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    flex-shrink: 0;
}

.sidebar-header-info { flex: 1; }
.sidebar-username { font-weight: 500; }

.sidebar-search {
    padding: 8px 12px;
    background: var(--wa-panel);
}

.sidebar-search input {
    width: 100%;
    padding: 8px 16px;
    background: var(--wa-input-bg);
    border: none;
    border-radius: 8px;
    color: var(--wa-text);
    font-size: 0.9rem;
    outline: none;
}

.contacts-list {
    flex: 1;
    overflow-y: auto;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--wa-border);
    transition: background 0.15s;
    gap: 12px;
}

.contact-item:hover,
.contact-item.active {
    background: var(--wa-hover);
}

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

.contact-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.contact-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.contact-time {
    font-size: 0.75rem;
    color: var(--wa-text-secondary);
    flex-shrink: 0;
}

.contact-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.contact-preview {
    font-size: 0.85rem;
    color: var(--wa-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 260px;
}

.unread-badge {
    background: var(--wa-green);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    min-width: 20px;
    height: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
}

.loading {
    padding: 32px;
    text-align: center;
    color: var(--wa-text-secondary);
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #0b141a;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23182229' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 6px solid var(--wa-green);
}

.welcome-content {
    text-align: center;
    max-width: 560px;
    padding: 32px;
}

.welcome-content h2 {
    font-weight: 300;
    font-size: 2rem;
    margin: 28px 0 16px;
    color: var(--wa-text);
}

.welcome-content p {
    color: var(--wa-text-secondary);
    font-size: 0.95rem;
}

.welcome-hint {
    margin-top: 12px;
    font-size: 0.85rem !important;
}

.chat-window {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    background: var(--wa-panel-light);
    gap: 12px;
    border-left: 1px solid var(--wa-border);
}

.chat-header-info { flex: 1; }

.chat-contact-name {
    display: block;
    font-weight: 500;
}

.chat-contact-status {
    font-size: 0.8rem;
    color: var(--wa-text-secondary);
}

.chat-contact-status.is-online {
    color: var(--wa-green);
}

.chat-contact-status.is-offline {
    color: var(--wa-text-secondary);
}

.chat-search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--wa-panel);
    border-left: 1px solid var(--wa-border);
}

.chat-search-bar input,
.chat-search-bar select {
    flex: 1;
    padding: 8px 12px;
    background: var(--wa-input-bg);
    border: 1px solid var(--wa-border);
    border-radius: 8px;
    color: var(--wa-text);
    font-size: 0.9rem;
    outline: none;
}

.chat-search-bar select {
    flex: 0 0 160px;
    max-width: 40%;
}

/* Messages */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 60px;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.message {
    max-width: 65%;
    padding: 6px 8px 8px 9px;
    border-radius: 8px;
    position: relative;
    word-wrap: break-word;
    margin-bottom: 2px;
}

.message.mine {
    align-self: flex-end;
    background: var(--wa-msg-out);
    border-top-right-radius: 0;
    cursor: default;
}

.message.mine:hover {
    filter: brightness(1.02);
}

.message.theirs {
    align-self: flex-start;
    background: var(--wa-msg-in);
    border-top-left-radius: 0;
}

.message-text {
    font-size: 0.9rem;
    line-height: 1.4;
    white-space: pre-wrap;
}

.message-meta {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 4px;
    margin-top: 2px;
}

.message-time {
    font-size: 0.68rem;
    color: rgba(255,255,255,0.6);
}

.message-edited {
    font-size: 0.65rem;
    color: rgba(255,255,255,0.5);
    font-style: italic;
    margin-right: 2px;
}

.message-forwarded {
    font-size: 0.72rem;
    color: rgba(255,255,255,0.55);
    margin-bottom: 4px;
    font-style: italic;
}

.message-status {
    font-size: 0.75rem;
    line-height: 1;
}

.tick-sent {
    color: rgba(255,255,255,0.5);
}

.tick-delivered {
    color: rgba(255,255,255,0.6);
}

.tick-read {
    color: #53bdeb;
}

.unread-divider {
    align-self: center;
    background: var(--wa-panel);
    color: var(--wa-text-secondary);
    font-size: 0.75rem;
    padding: 6px 14px;
    border-radius: 8px;
    margin: 12px auto;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.date-divider {
    align-self: center;
    background: rgba(42, 57, 66, 0.95);
    color: var(--wa-text-secondary);
    font-size: 0.75rem;
    padding: 6px 14px;
    border-radius: 8px;
    margin: 16px auto 8px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.message-audio {
    min-width: 220px;
    max-width: 280px;
    height: 36px;
    display: block;
}

.mic-btn.recording {
    color: #ea0038;
    background: rgba(234, 0, 56, 0.15);
    animation: pulse-mic 1s infinite;
}

@keyframes pulse-mic {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Message Info Modal */
.info-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 2500;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-modal-content {
    background: var(--wa-panel);
    border-radius: 8px;
    width: 90%;
    max-width: 360px;
    overflow: hidden;
}

.info-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--wa-border);
    font-weight: 500;
}

.info-modal-body {
    padding: 8px 0;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid var(--wa-border);
}

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

.info-label {
    color: var(--wa-text-secondary);
    font-size: 0.9rem;
}

.info-value {
    font-size: 0.85rem;
    text-align: right;
    max-width: 60%;
}

.message-image {
    max-width: 330px;
    border-radius: 6px;
    cursor: pointer;
    display: block;
}

.message-video {
    max-width: 330px;
    border-radius: 6px;
    display: block;
}

.message-doc {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 6px;
    text-decoration: none;
    color: var(--wa-text);
    min-width: 240px;
}

.message-doc:hover { background: rgba(0,0,0,0.3); }

.message-doc-previewable {
    cursor: pointer;
}

.doc-icon {
    width: 42px;
    height: 42px;
    background: var(--wa-green);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.doc-info { min-width: 0; }

.doc-name {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.message-caption {
    margin-top: 6px;
    font-size: 0.9rem;
}

/* Chat Input */
.chat-input-area {
    display: flex;
    align-items: flex-end;
    padding: 10px 16px;
    background: var(--wa-panel-light);
    gap: 8px;
    border-left: 1px solid var(--wa-border);
}

.attach-menu-wrapper { position: relative; }

.attach-menu {
    position: absolute;
    bottom: 50px;
    left: 0;
    background: var(--wa-panel);
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    min-width: 180px;
    z-index: 100;
}

.attach-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.15s;
}

.attach-option:hover { background: var(--wa-hover); }

.attach-option span {
    font-size: 0.9rem;
}

.message-input-wrapper {
    flex: 1;
    background: var(--wa-input-bg);
    border-radius: 8px;
    padding: 8px 12px;
}

.message-input-wrapper textarea {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--wa-text);
    font-size: 0.95rem;
    font-family: inherit;
    resize: none;
    outline: none;
    max-height: 120px;
    line-height: 1.4;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--wa-text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.icon-btn:hover {
    background: var(--wa-hover);
    color: var(--wa-text);
}

.send-btn {
    color: var(--wa-text-secondary);
}

.send-btn.active {
    color: var(--wa-green);
}

.mobile-back { display: none; }

/* Preview Modal */
.preview-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-modal-content {
    background: var(--wa-panel);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--wa-panel-light);
}

.preview-body {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    min-height: 200px;
    max-height: 50vh;
}

.preview-body img {
    max-width: 100%;
    max-height: 45vh;
    border-radius: 8px;
    object-fit: contain;
}

.preview-body video {
    max-width: 100%;
    max-height: 45vh;
    border-radius: 8px;
}

.preview-doc-preview {
    text-align: center;
    padding: 32px;
}

.preview-doc-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.preview-doc-name {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 8px;
    word-break: break-all;
}

.preview-doc-size {
    color: var(--wa-text-secondary);
    font-size: 0.85rem;
}

.preview-doc-type {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--wa-green);
    text-transform: uppercase;
}

.preview-caption {
    padding: 12px 16px;
    border-top: 1px solid var(--wa-border);
}

.preview-caption input {
    width: 100%;
    padding: 10px 14px;
    background: var(--wa-input-bg);
    border: none;
    border-radius: 8px;
    color: var(--wa-text);
    font-size: 0.95rem;
    outline: none;
}

.preview-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 12px 16px;
    border-top: 1px solid var(--wa-border);
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    background: none;
    border: none;
    color: #fff;
    font-size: 2.5rem;
    cursor: pointer;
    z-index: 3001;
}

.lightbox-content img,
.lightbox-content video {
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
}

.doc-preview-frame {
    width: 90vw;
    height: 90vh;
    border: none;
    background: #fff;
    border-radius: 4px;
}

.doc-preview-html {
    background: #fff;
    color: #111;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
    padding: 24px;
    border-radius: 8px;
}

.doc-preview-sheet table {
    border-collapse: collapse;
    font-size: 0.85rem;
}

.doc-preview-sheet td,
.doc-preview-sheet th {
    border: 1px solid #ddd;
    padding: 6px 10px;
}

.doc-preview-loading,
.doc-preview-error {
    color: #fff;
    font-size: 1rem;
    padding: 40px;
}

/* Context menu */
.msg-context-menu {
    position: fixed;
    z-index: 4000;
    background: var(--wa-panel);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
    min-width: 140px;
    overflow: hidden;
}

.msg-context-menu button {
    display: block;
    width: 100%;
    padding: 12px 16px;
    background: none;
    border: none;
    color: var(--wa-text);
    text-align: left;
    cursor: pointer;
    font-size: 0.9rem;
}

.msg-context-menu button:hover {
    background: var(--wa-hover);
}

/* Forward modal */
.forward-modal,
.edit-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 3500;
    display: flex;
    align-items: center;
    justify-content: center;
}

.forward-modal-content,
.edit-modal-content {
    background: var(--wa-panel);
    border-radius: 8px;
    width: 90%;
    max-width: 420px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.forward-modal-header,
.edit-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--wa-border);
    font-weight: 500;
}

.forward-search {
    padding: 12px 16px;
    border-bottom: 1px solid var(--wa-border);
}

.forward-search input {
    width: 100%;
    padding: 10px 14px;
    background: var(--wa-input-bg);
    border: none;
    border-radius: 8px;
    color: var(--wa-text);
    outline: none;
}

.forward-contacts {
    overflow-y: auto;
    max-height: 50vh;
}

.forward-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 1px solid var(--wa-border);
    color: var(--wa-text);
    cursor: pointer;
    text-align: left;
}

.forward-contact-item:hover {
    background: var(--wa-hover);
}

.edit-modal-content textarea {
    margin: 16px;
    width: calc(100% - 32px);
    padding: 12px;
    background: var(--wa-input-bg);
    border: 1px solid var(--wa-border);
    border-radius: 8px;
    color: var(--wa-text);
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    outline: none;
}

.edit-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 12px 16px;
    border-top: 1px solid var(--wa-border);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        min-width: unset;
    }

    .chat-area {
        display: none;
    }

    .app-container.chat-open .sidebar {
        display: none;
    }

    .app-container.chat-open .chat-area {
        display: flex;
        width: 100%;
    }

    .mobile-back { display: flex; }

    .messages-container {
        padding: 12px 16px;
    }

    .message { max-width: 85%; }
}