/* ============================
   Teams CSS Variables
   ============================ */

:root {
    /* Teams Colors */
    --teams-purple: #6264A7;
    --teams-purple-light: #E8E8F5;
    --teams-gray-bg: #F5F5F5;
    --teams-gray-light: #EBEBEB;
    --teams-gray-dark: #242424;
    --teams-gray-text: #616161;
    --teams-white: #FFFFFF;

    /* Typography */
    --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Inter', sans-serif;
    --font-size-sm: 11px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;

    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-normal: 300ms ease;
}

/* ============================
   Global Styles
   ============================ */

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

html,
body {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--teams-gray-dark);
    background-color: var(--teams-gray-bg);
    min-height: 100vh;
    width: 100%;
}

.teams-layout {
    display: grid;
    grid-template-columns: 62px 1fr;
    grid-template-rows: auto 1fr;
    height: 100vh;
    overflow-x: hidden;
}

/* ============================
   Left Sidebar Styling
   ============================ */

.teams-sidebar {
    background-color: #ebebeb;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-md);
    border-right: 1px solid #ebebeb;
    overflow-y: auto;
    height: 100%;
    grid-column: 1;
    grid-row: 2;
    scrollbar-width: none;
}

.teams-sidebar::-webkit-scrollbar {
    display: none;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: absolute;
    left: var(--spacing-md);
}

.sidebar-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: #EBEBEB;
    transition: all var(--transition-fast);
    padding: 0;
}

.sidebar-icon:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
    flex: 1;
    padding: var(--spacing-md) 0;
}

.sidebar-nav-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 4px var(--spacing-md);
    gap: var(--spacing-xs);
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    color: #EBEBEB;
    transition: none;
    padding: 0;
}

.sidebar-nav-item:hover {
    background-color: transparent;
}

.sidebar-nav-item.active {
    background-color: transparent;
    color: #EBEBEB;
    border-radius: 0;
}

.sidebar-nav-icon {
    object-fit: contain;
    display: block;
}

.sidebar-label {
    display: block;
    font-size: 11px;
    font-weight: var(--font-weight-medium);
    color: #EBEBEB;
    text-align: center;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-separator {
    width: 70%;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.1);
    margin: var(--spacing-md) auto;
    align-self: center;
}

.sidebar-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    width: 100%;
}

.sidebar-admin {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: #EBEBEB;
    transition: all var(--transition-fast);
}

.sidebar-admin:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar-profile {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    margin-top: auto;
    padding: 0;
}

.profile-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6264A7 0%, #5455A1 100%);
    color: #fff;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

/* ============================
   Main Content Area
   ============================ */

.teams-main {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    grid-column: 2;
    grid-row: 2;
}

/* ============================
   Top Shell Bar
   ============================ */

.teams-shell-bar {
    background-color: #ebebeb;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    border-bottom: 1px solid #cccccc;
    position: relative;
    grid-column: 1 / -1;
    grid-row: 1;
}

.shell-bar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    position: absolute;
    left: 70px;
    top: 50%;
    transform: translateY(-50%);
}

.shell-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-purple);
    transition: all var(--transition-fast);
    padding: 0;
}

.shell-logo-icon {
    object-fit: contain;
    display: block;
    width: 100%;
    height: 100%;
}

.shell-search {
    display: flex;
    align-items: center;
    width: 400px;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--teams-gray-bg);
    border: 1px solid transparent;
    border-radius: 20px;
    transition: all var(--transition-fast);
    gap: var(--spacing-sm);
    flex: 1;
    max-width: 400px;
    margin: 0 var(--spacing-lg);
}

.shell-search:focus-within {
    border-color: var(--teams-purple);
    box-shadow: 0 0 0 3px rgba(98, 100, 167, 0.1);
}

.shell-search svg {
    color: var(--teams-gray-text);
    flex-shrink: 0;
}

.shell-search-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--teams-gray-text);
}

.shell-search-input {
    flex: 1;
    background: transparent;
    border: none;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--teams-gray-dark);
    outline: none;
}

.shell-search-input::placeholder {
    color: var(--teams-gray-text);
}

.shell-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: absolute;
    right: var(--spacing-lg);
}

.shell-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 0px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-gray-text);
    transition: all var(--transition-fast);
    padding: 0;
}

.shell-icon-btn:hover {
    background-color: var(--teams-gray-bg);
    color: var(--teams-gray-dark);
}

.shell-icon {
    width: 50px;
    height: 50px;
    object-fit: contain;
    display: block;
}

.shell-user-profile {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.shell-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6264A7 0%, #5455A1 100%);
    color: var(--teams-white);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
}

.teams-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ============================
   Left Chat Panel
   ============================ */

.teams-chat-panel {
    width: 300px;
    background-color: #F5F5F5;
    border-right: 1px solid var(--teams-gray-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-panel-header {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--teams-gray-light);
}

.chat-panel-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--teams-gray-dark);
    margin: 0;
}

.chat-panel-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.chat-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-gray-text);
    transition: all var(--transition-fast);
}

.chat-action-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--teams-gray-dark);
}

.chat-search {
    padding: var(--spacing-md) var(--spacing-lg);
    position: relative;
}

.chat-search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 32px;
    background-color: var(--teams-white);
    border: 1px solid var(--teams-gray-light);
    border-radius: 20px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    color: var(--teams-gray-dark);
    outline: none;
    transition: all var(--transition-fast);
}

.chat-search-input:focus {
    border-color: var(--teams-purple);
    box-shadow: 0 0 0 3px rgba(98, 100, 167, 0.1);
}

.chat-search-input::placeholder {
    color: var(--teams-gray-text);
}

.chat-search svg {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--teams-gray-text);
    pointer-events: none;
}

.chat-tabs {
    display: flex;
    padding: var(--spacing-sm) var(--spacing-lg);
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--teams-gray-light);
}

.chat-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--teams-gray-text);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-tab:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--teams-gray-dark);
}

.chat-tab.active {
    background-color: var(--teams-purple);
    color: var(--teams-white);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.chat-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.chat-item:first-child {
    background-color: rgba(98, 100, 167, 0.08);
}

.chat-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.chat-item:active {
    background-color: rgba(98, 100, 167, 0.1);
}

.chat-avatar {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #D4C5E8;
    color: var(--teams-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    margin-right: var(--spacing-md);
}

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

.chat-item:nth-child(1) .chat-avatar {
    background: transparent;
}

.chat-item:nth-child(2) .chat-avatar {
    background: #E8D4C5;
    color: #333;
}

.chat-item:nth-child(3) .chat-avatar {
    background: #D4E8C5;
    color: #333;
}

.chat-item:nth-child(4) .chat-avatar {
    background: #C5D4E8;
    color: #333;
}

.chat-item:nth-child(5) .chat-avatar {
    background: #E8C5D4;
    color: #333;
}

.chat-item:nth-child(6) .chat-avatar {
    background: #D4E8E0;
    color: #333;
}

.chat-item:nth-child(7) .chat-avatar {
    background: #E8DCC5;
    color: #333;
}

.chat-avatar--group {
    background: #D4E8E0 !important;
    color: #333 !important;
}

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

.chat-name {
    font-weight: var(--font-weight-medium);
    color: var(--teams-gray-dark);
    font-size: var(--font-size-base);
    margin: 0 0 2px 0;
}

.chat-preview {
    font-size: var(--font-size-sm);
    color: var(--teams-gray-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.chat-time {
    flex-shrink: 0;
    font-size: var(--font-size-sm);
    color: var(--teams-gray-text);
    margin-left: var(--spacing-sm);
}

.teams-content-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ============================
   App Bar Styling (Top Header)
   ============================ */

.teams-app-bar {
    background-color: var(--teams-white);
    border-bottom: 1px solid var(--teams-gray-light);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.app-bar-left {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.app-bar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.app-bar-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.app-bar-user-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.app-bar-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--teams-gray-dark);
    margin: 0;
}

.app-bar-subtitle {
    font-size: var(--font-size-sm);
    color: var(--teams-gray-text);
    margin: 0;
}

.app-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-gray-text);
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--teams-gray-bg);
    color: var(--teams-gray-dark);
}

.app-bar-icon-btn {
    display: flex;
    align-items: left;
    justify-content: right;
    border-radius: 2px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-gray-text);
    transition: all var(--transition-fast);
    padding: 0;
}

.app-bar-icon-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--teams-gray-dark);
}


.status-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #ccc;
}

.status-indicator--online {
    background-color: #31A24C;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.status-text {
    font-size: var(--font-size-sm);
    color: var(--teams-gray-text);
}

/* ============================
   Chat Container
   ============================ */

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--teams-white);
    min-height: 0;
}

.chat-intro {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
    transition: all 300ms ease;
}

.chat-intro.hidden {
    display: none;
    flex: 0;
}

.intro-icon {
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.intro-title {
    font-size: 24px;
    font-weight: var(--font-weight-semibold);
    color: var(--teams-gray-dark);
    margin: 0 0 var(--spacing-sm) 0;
}

.intro-subtitle {
    font-size: var(--font-size-base);
    color: var(--teams-gray-text);
    margin: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: none;
    margin: 0;
    width: 100%;
    scroll-behavior: smooth;
    min-height: 0;
}

/* ============================
   Message Bubbles
   ============================ */

.message-group {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    animation: slideUp 300ms ease forwards;
}

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

/* Bot Messages (Left-aligned) */
.message-group--bot {
    justify-content: flex-start;
    align-items: flex-end;
}

.message-avatar {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--teams-purple) 0%, #6B5FA6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--teams-white);
    font-weight: var(--font-weight-semibold);
    font-size: 14px;
    flex-shrink: 0;
    overflow: hidden;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-bubble {
    background-color: var(--teams-white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
    max-width: 600px;
    word-wrap: break-word;
}

.message-bubble p {
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.5;
}

.message-bubble p:last-child {
    margin-bottom: 0;
}

.message-bubble strong,
.message-bubble b {
    font-weight: var(--font-weight-semibold);
    color: var(--teams-purple);
}

.message-bubble em,
.message-bubble i {
    font-style: italic;
    color: var(--teams-gray-text);
}

.message-time {
    font-size: var(--font-size-sm);
    color: var(--teams-gray-text);
    margin-top: var(--spacing-xs);
}

/* User Messages (Right-aligned) */
.message-group--user {
    justify-content: flex-end;
    flex-direction: column;
    align-items: flex-end;
}

.message-bubble--user {
    background-color: var(--teams-purple);
    color: var(--teams-white);
    margin-left: auto;
}

.message-bubble--user strong,
.message-bubble--user b {
    font-weight: var(--font-weight-semibold);
    color: var(--teams-purple-light);
}

.message-bubble--user em,
.message-bubble--user i {
    color: var(--teams-purple-light);
}

.message-group--user .message-time {
    text-align: right;
    margin-right: 0;
    margin-top: var(--spacing-xs);
}

/* ============================
   Quick Reply Buttons
   ============================ */

.quick-replies {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    margin-left: 40px;
}

.quick-reply-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--teams-white);
    color: var(--teams-purple);
    border: 1.5px solid var(--teams-purple);
    border-radius: 20px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 40px;
    max-width: 400px;
    text-align: left;
    white-space: normal;
}

.quick-reply-btn:hover:not(:disabled) {
    background-color: var(--teams-purple-light);
    border-color: var(--teams-purple);
}

.quick-reply-btn:active:not(:disabled) {
    background-color: var(--teams-purple);
    color: var(--teams-white);
}

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

.quick-reply-btn:focus-visible {
    outline: 2px solid var(--teams-purple);
    outline-offset: 2px;
}

/* ============================
   Typing Indicator
   ============================ */

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--teams-white);
    border-radius: 8px;
    width: fit-content;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background-color: var(--teams-gray-text);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-10px);
    }
}

/* ============================
   CTA Buttons (For Endings)
   ============================ */

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    margin-left: 40px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--teams-purple);
    color: var(--teams-white);
    border: none;
    border-radius: 6px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    max-width: 400px;
    text-decoration: none;
}

.cta-btn:hover {
    background-color: #5455A1;
    box-shadow: 0 4px 8px rgba(98, 100, 167, 0.2);
}

.cta-btn:active {
    transform: scale(0.98);
}

.cta-btn:focus-visible {
    outline: 2px solid var(--teams-purple);
    outline-offset: 2px;
}

/* ============================
   Teams Footer / Message Input
   ============================ */

.teams-footer {
    background-color: var(--teams-white);
    border-top: 1px solid var(--teams-gray-light);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-gray-text);
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background-color: var(--teams-gray-bg);
    color: var(--teams-gray-dark);
}

.message-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.message-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--teams-gray-bg);
    border: 1px solid var(--teams-gray-light);
    border-radius: 20px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--teams-gray-dark);
    outline: none;
    transition: all var(--transition-fast);
}

.message-input:focus {
    border-color: var(--teams-purple);
    box-shadow: 0 0 0 3px rgba(98, 100, 167, 0.1);
}

.message-input::placeholder {
    color: var(--teams-gray-text);
}

.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--teams-purple);
    transition: all var(--transition-fast);
}

.send-btn:hover {
    background-color: var(--teams-gray-bg);
}

.send-btn:active {
    background-color: var(--teams-purple-light);
}

/* ============================
   Loading State
   ============================ */

.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 2px solid var(--teams-gray-light);
    border-top-color: var(--teams-purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================
   Responsive Design
   ============================ */

@media (max-width: 768px) {
    .teams-layout {
        grid-template-columns: 48px 1fr;
    }

    .teams-chat-panel {
        display: none;
    }

    .teams-content {
        flex-direction: column;
    }

    .teams-content-right {
        flex: 1;
    }

    .app-bar-left {
        min-width: 0;
    }

    .app-bar-title {
        font-size: var(--font-size-base);
    }

    .chat-messages {
        padding: var(--spacing-md);
    }

    .message-bubble {
        max-width: 85vw;
    }

    .quick-replies {
        margin-left: 0;
    }

    .cta-buttons {
        margin-left: 0;
    }
}

/* Portrait Tablet View (600px - 768px) */
@media (min-width: 481px) and (max-width: 768px) and (orientation: portrait) {
    .app-bar-right {
        display: none;
    }
}

@media (max-width: 480px) {
    .teams-shell-bar {
        padding: 4px var(--spacing-md);
        gap: var(--spacing-sm);
        display: grid;
        grid-template-columns: auto 1fr auto;
        grid-template-rows: auto auto;
        align-items: center;
    }

    .sidebar-header {
        position: static;
        grid-column: 1;
        grid-row: 1;
    }

    .shell-bar-left {
        gap: var(--spacing-sm);
        position: static;
        grid-column: 2;
        grid-row: 1;
        margin-left: -5px;
        align-self: flex-end;
        margin-bottom: -9px;
    }

    .shell-bar-right {
        position: static;
        grid-column: 3;
        grid-row: 1;
    }

    .shell-search {
        width: 140px;
        max-width: none;
        margin: 0 auto;
        margin-left: 50px;
        grid-column: 2;
        grid-row: 1;
        padding: var(--spacing-xs) var(--spacing-md);
        align-self: center;
    }

    .shell-search-icon {
        width: 14px;
        height: 14px;
        flex-shrink: 0;
    }

    .shell-search-input {
        font-size: var(--font-size-sm);
    }

    .shell-logo {
        width: 32px;
        height: 32px;
    }

    .teams-app-bar {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .app-bar-title {
        font-size: var(--font-size-base);
    }

    .app-bar-subtitle {
        font-size: 10px;
    }

    .app-bar-right {
        gap: var(--spacing-sm);
        display: none;
    }

    .chat-messages {
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    .chat-intro {
        padding: var(--spacing-lg);
    }

    .intro-icon svg {
        width: 80px;
        height: 80px;
    }

    .intro-title {
        font-size: 18px;
    }

    .message-group {
        margin-bottom: var(--spacing-sm);
    }

    .message-avatar {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .message-bubble {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .quick-reply-btn,
    .cta-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 13px;
        min-height: 40px;
    }

    .quick-replies,
    .cta-buttons {
        margin-left: var(--spacing-md);
    }

    .teams-footer {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ============================
   Accessibility
   ============================ */

@media (prefers-reduced-motion: reduce) {
    .message-group,
    .typing-dot,
    .quick-reply-btn,
    .cta-btn {
        animation: none;
        transition: none;
    }

    .status-indicator--online {
        animation: none;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--teams-purple);
    outline-offset: 2px;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--teams-gray-light);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--teams-gray-text);
}