/* ===== Chat Page Styles ===== */

.chat-container {
    display: flex;
    height: calc(100vh - var(--topbar-height));
    width: 100%;
    overflow: hidden;
    background: var(--bg-primary);
}

/* Chat Sidebar (Contacts List) */
.chat-sidebar-panel {
    width: 320px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.chat-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-sidebar-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.chat-search {
    position: relative;
    width: 100%;
}

.chat-search input {
    width: 100%;
    padding: 10px 15px 10px 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all var(--transition-fast);
}

.chat-search input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.chat-search svg {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.chat-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    gap: 15px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    margin-bottom: 5px;
}

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

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

.chat-item-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
    position: relative;
    background-color: var(--bg-card);
}

.chat-item-status {
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #10b981;
    border: 2px solid var(--bg-secondary);
}

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

.chat-item-name {
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-last {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== Chat Empty State ===== */
.chat-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: var(--text-secondary);
    height: 100%;
}

.chat-empty-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-hover);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    margin-bottom: 20px;
}

.chat-empty-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.chat-empty-subtext {
    font-size: 13px;
    margin-bottom: 24px;
    line-height: 1.5;
}

.chat-empty-btn {
    background: var(--accent-gradient);
    color: var(--btn-primary-text);
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-empty-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* Chat Main Area */
.chat-main-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    position: relative;
}

/* No active chat placeholder */
.chat-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-muted);
}

.chat-placeholder svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.chat-placeholder h2 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

/* Active chat header */
.chat-header {
    padding: 15px 25px;
    border-bottom: 1px solid var(--border-color);
    display: none;
    /* Block when active */
    align-items: center;
    gap: 15px;
    background: var(--bg-secondary);
}

.chat-header-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-card);
}

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

.chat-header-name {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
}

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

.chat-header-actions {
    display: flex;
    gap: 15px;
}

.chat-header-btn {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.chat-header-btn:hover {
    color: var(--accent-primary);
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    padding: 25px;
    overflow-y: auto;
    display: none;
    /* flex when active */
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    max-width: 75%;
    animation: fadeIn 0.3s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.sent {
    align-self: flex-end;
}

.message.received {
    align-self: flex-start;
}

.message-bubble {
    padding: 12px 18px;
    border-radius: 20px;
    font-size: 14.5px;
    line-height: 1.4;
    word-break: break-word;
}

.message.sent .message-bubble {
    background: var(--accent-gradient);
    color: var(--btn-primary-text);
    border-bottom-right-radius: 4px;
}

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

.message-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 5px;
    align-self: flex-end;
}

/* Chat Input */
.chat-input-area {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    display: none;
    /* flex when active */
    gap: 15px;
    align-items: center;
}

.chat-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 8px 15px;
}

.chat-input-btn {
    color: var(--text-secondary);
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-input-btn:hover {
    color: var(--text-primary);
}

.chat-input {
    flex: 1;
    border: none;
    background: none;
    padding: 10px;
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    font-family: inherit;
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.chat-send-btn {
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: var(--btn-primary-text);
    transition: transform 0.2s, background 0.2s;
}

.chat-send-btn:hover {
    transform: scale(1.05);
    background: var(--accent-secondary);
}

/* Responsive */
@media (max-width: 900px) {
    .chat-container {
        position: relative;
    }

    .chat-sidebar-panel {
        width: 100%;
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 10;
        transition: transform 0.3s ease;
    }

    .chat-main-panel {
        width: 100%;
    }

    .chat-sidebar-panel.hidden {
        transform: translateX(-100%);
    }

    .chat-header-back {
        display: block !important;
        margin-right: 10px;
    }
}

.chat-header-back {
    display: none;
    color: var(--text-primary);
}

/* Add Friend Button in Sidebar Header */
.chat-add-friend-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

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

/* ===== Add Friend Modal ===== */
.chat-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.chat-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.chat-modal {
    background: var(--bg-primary);
    width: 90%;
    max-width: 480px;
    border-radius: var(--radius-xl);
    padding: 30px;
    position: relative;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.chat-modal-overlay.active .chat-modal {
    transform: translateY(0) scale(1);
}

.chat-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.chat-modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.chat-modal-header {
    margin-bottom: 25px;
    text-align: center;
}

.chat-modal-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.chat-modal-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.chat-modal-body {
    margin-bottom: 25px;
}

.chat-modal-input-group {
    display: flex;
    gap: 10px;
}

.chat-modal-input {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: border-color var(--transition-fast);
}

.chat-modal-input:focus {
    border-color: var(--accent-primary);
}

.chat-modal-submit-btn {
    background: var(--accent-gradient);
    border: none;
    color: var(--btn-primary-text);
    font-weight: 600;
    padding: 0 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-modal-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.chat-modal-submit-btn:active {
    transform: translateY(0);
}

.chat-modal-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.chat-modal-feedback {
    margin-top: 10px;
    font-size: 13px;
    text-align: center;
    min-height: 20px;
    font-weight: 500;
}

.chat-modal-feedback.error {
    color: #ef4444;
}

.chat-modal-feedback.success {
    color: #10b981;
}

.chat-modal-footer {
    display: flex;
    justify-content: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.chat-modal-my-id {
    background: var(--bg-secondary);
    padding: 10px 20px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.my-id-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.my-id-value {
    font-weight: 700;
    color: var(--text-primary);
    font-family: monospace;
    font-size: 15px;
    letter-spacing: 0.5px;
}