/* Viber-like Chat App Styles */
:root {
    --viber-purple: #7360f2;
    --viber-purple-dark: #5d4ac7;
    --viber-purple-light: #8f7ff5;
    --viber-bg: #f5f5f7;
    --viber-white: #ffffff;
    --viber-text: #333333;
    --viber-text-light: #666666;
    --viber-border: #e0e0e0;
    --viber-green: #4caf50;
    --viber-red: #f44336;
    --message-sent: #7360f2;
    --message-received: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--viber-bg);
    color: var(--viber-text);
    -webkit-font-smoothing: antialiased;
}

/* Auth Pages */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--viber-purple) 0%, var(--viber-purple-dark) 100%);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 30px;
}

.viber-logo {
    width: 80px;
    height: 80px;
    background-color: var(--viber-white);
    color: var(--viber-purple);
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.auth-logo h1 {
    color: var(--viber-white);
    font-size: 28px;
}

.auth-form {
    background-color: var(--viber-white);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.auth-form h2 {
    margin-bottom: 25px;
    text-align: center;
    color: var(--viber-text);
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--viber-border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

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

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--viber-purple-dark);
}

.btn-block {
    width: 100%;
    display: block;
}

.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background-color: #ffebee;
    color: var(--viber-red);
    border: 1px solid #ffcdd2;
}

.alert-success {
    background-color: #e8f5e9;
    color: var(--viber-green);
    border: 1px solid #c8e6c9;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--viber-white);
}

.auth-footer a {
    color: var(--viber-white);
    font-weight: 600;
    text-decoration: none;
}

/* User Interface */
.app-container {
    max-width: 480px;
    margin: 0 auto;
    background-color: var(--viber-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.1);
}

/* Header */
.app-header {
    background-color: var(--viber-purple);
    color: var(--viber-white);
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.app-header h1 {
    font-size: 20px;
    font-weight: 600;
}

.header-user {
    font-size: 14px;
    opacity: 0.9;
}

/* Tab Bar */
.tab-bar {
    display: flex;
    background-color: var(--viber-white);
    border-top: 1px solid var(--viber-border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    bottom: 0;
    z-index: 100;
}

.tab-item {
    flex: 1;
    padding: 12px 5px;
    text-align: center;
    color: var(--viber-text-light);
    text-decoration: none;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.tab-item.active {
    color: var(--viber-purple);
    border-bottom-color: var(--viber-purple);
}

.tab-icon {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
    height: 28px;
}

.tab-icon svg {
    width: 24px;
    height: 24px;
}

.tab-label {
    font-size: 12px;
    display: block;
}

/* Content Area */
.app-content {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 60px;
}

/* Chat Messages */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 140px);
}

.messages-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background-color: #f8f8f8;
}

.message {
    margin-bottom: 15px;
    display: flex;
    animation: fadeIn 0.3s;
}

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

.message.sent {
    justify-content: flex-end;
}

.message-bubble {
    max-width: 70%;
    padding: 12px 45px 12px 16px;
    border-radius: 18px;
    position: relative;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message.sent .message-bubble {
    background-color: var(--message-sent);
    color: var(--viber-white);
    border-bottom-right-radius: 4px;
}

.message.received .message-bubble {
    background-color: var(--message-received);
    color: var(--viber-text);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--viber-border);
}

.message-content {
    word-wrap: break-word;
    font-size: 14px;
    line-height: 1.4;
}

.message-image img,
.message-video video {
    max-width: 100%;
    border-radius: 12px;
    display: block;
}

.message-time {
    font-size: 11px;
    opacity: 0.7;
    margin-top: 4px;
    text-align: right;
}

.pinned-message {
    padding: 12px 15px;
    margin: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

/* Admin pinned message (yellow) */
.pinned-message.admin-pin {
    background-color: #fff9e6;
    border-left: 4px solid #ffc107;
}

.pinned-message.admin-pin strong {
    color: #ff9800;
}

/* User pinned message (blue) */
.pinned-message.user-pin {
    background-color: #e3f2fd;
    border-left: 4px solid #2196f3;
}

.pinned-message.user-pin strong {
    color: #1976d2;
}

.pinned-content {
    flex: 1;
}

.pinned-close {
    background: none;
    border: none;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 300;
}

.admin-pin .pinned-close {
    color: #ff9800;
}

.user-pin .pinned-close {
    color: #1976d2;
}

.pinned-close:hover {
    opacity: 0.7;
}

.pinned-close:active {
    transform: scale(0.9);
}

/* Message Input */
.message-input-area {
    padding: 15px;
    background-color: var(--viber-white);
    border-top: 1px solid var(--viber-border);
    display: flex;
    gap: 10px;
    align-items: center;
}

.message-input-area input[type="text"] {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--viber-border);
    border-radius: 20px;
    font-size: 14px;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--viber-purple);
    color: var(--viber-white);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    padding: 0;
}

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

.btn-icon:hover {
    background-color: var(--viber-purple-dark);
}

/* Call Page */
.call-container {
    padding: 30px 20px;
    text-align: center;
}

.admin-avatar {
    width: 120px;
    height: 120px;
    background-color: var(--viber-purple);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--viber-white);
}

.contact-info {
    margin-top: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background-color: var(--viber-white);
    border-radius: 12px;
    margin-bottom: 15px;
    text-decoration: none;
    color: var(--viber-text);
    border: 1px solid var(--viber-border);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--viber-purple);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--viber-white);
    font-size: 24px;
    margin-right: 15px;
}

.contact-details h3 {
    font-size: 16px;
    margin-bottom: 5px;
}

.contact-details p {
    font-size: 14px;
    color: var(--viber-text-light);
}

/* Promotions */
.promotion-list {
    padding: 20px;
}

.promotion-card {
    background-color: var(--viber-white);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.promotion-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.promotion-content {
    padding: 15px;
}

.promotion-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--viber-purple);
}

.promotion-content p {
    font-size: 14px;
    color: var(--viber-text-light);
    line-height: 1.6;
}

.promotion-date {
    font-size: 12px;
    color: var(--viber-text-light);
    margin-top: 10px;
}

/* Settings */
.settings-container {
    padding: 20px;
}

.settings-section {
    background-color: var(--viber-white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.settings-section h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--viber-purple);
}

/* Admin Styles */
.admin-container {
    display: flex;
    height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    background-color: var(--viber-white);
}

.admin-sidebar {
    width: 300px;
    background-color: #f8f9fa;
    border-right: 1px solid var(--viber-border);
    overflow-y: auto;
}

.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.admin-header {
    background-color: var(--viber-purple);
    color: var(--viber-white);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-list-item {
    padding: 15px 20px;
    border-bottom: 1px solid var(--viber-border);
    cursor: pointer;
    transition: background-color 0.2s;
}

.user-list-item:hover {
    background-color: #e9ecef;
}

.user-list-item.active {
    background-color: var(--viber-purple-light);
    color: var(--viber-white);
}

.user-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.user-info p {
    font-size: 13px;
    opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
    .admin-container {
        flex-direction: column;
    }

    .admin-sidebar {
        width: 100%;
        height: auto;
        max-height: 40vh;
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none !important;
}

/* Loading */
.loading {
    text-align: center;
    padding: 20px;
    color: var(--viber-text-light);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--viber-text-light);
}

.empty-state-icon {
    font-size: 64px;
    opacity: 0.3;
    margin-bottom: 15px;
}

/* Pin Button on Messages */
.message-bubble {
    position: relative;
}

.pin-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
    z-index: 10;
}

.message.sent .pin-btn {
    background: rgba(255, 255, 255, 0.3);
}

.pin-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.pin-btn:active {
    transform: scale(0.95);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 14px;
    z-index: 10001;
    opacity: 0;
    transition: all 0.3s ease-out;
    white-space: nowrap;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}