:root {
    --chat-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --chat-fast-transition: all 0.2s ease;
}

/* =========================
   FAB (Floating Action Button)
   ========================= */
.chat-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-ubam-dark-gray);
    color: var(--color-ubam-white);
    border: none;
    box-shadow: 0 4px 12px rgba(33, 33, 33, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: var(--chat-transition);
}

.chat-fab:hover {
    background: var(--color-ubam-dark-blue);
    box-shadow: 0 6px 16px rgba(33, 33, 33, 0.4);
    transform: scale(1.05);
}

.chat-fab:active {
    transform: scale(0.95);
}

.chat-fab.hidden {
    transform: scale(0);
    opacity: 0;
    pointer-events: none;
}

.chat-fab .notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 18px;
    height: 18px;
    background: var(--color-ubam-pink);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* =========================
   Icons Normalization
   ========================= */
.close-icon,
.control-icon,
.support-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.support-icon img {
    filter: brightness(0) invert(1);
    width: 24px;
    height: 24px;
}

.welcome-icon img {
    height: 5.4rem;
    width: 5.4rem;
}

.send-button .material-symbols-rounded,
.close-button .material-symbols-rounded,
.control-btn .material-symbols-rounded,
.support-icon .material-symbols-rounded {
    font-size: 24px;
    line-height: 1;
    margin: 0;
    display: block;
}

/* =========================
   Overlays
   ========================= */
.chat-overlay,
.clear-chat-modal,
.rate-limit-modal {
    position: fixed;
    inset: 0;
    background: rgba(33, 33, 33, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-overlay {
    z-index: 9998;
    opacity: 0;
    pointer-events: none;
    transition: var(--chat-transition);
}

.chat-overlay.visible {
    opacity: 1;
    pointer-events: all;
}

.clear-chat-modal {
    z-index: 10000;
    animation: fadeIn 0.2s ease;
}

.rate-limit-modal {
    z-index: 10001;
    animation: fadeIn 0.2s ease;
}

/* =========================
   Chat Container
   ========================= */
.chatbot-container {
    position: fixed;
    bottom: 90px;
    right: 16px;
    width: 380px;
    height: 550px;
    background: var(--color-ubam-white);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(33, 33, 33, 0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 9999;
    transform: scale(0) translateY(50px);
    opacity: 0;
    transform-origin: bottom right;
    transition: var(--chat-transition);
}

.chatbot-container.visible {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* =========================
   Header
   ========================= */
.chat-header {
    background: var(--color-ubam-dark);
    color: var(--color-ubam-white);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    min-height: 72px;
}

.chat-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ubam-white);
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.avatar img {
    width: 32px;
    height: 32px;
}

.chat-info {
    flex: 1;
    position: relative;
    z-index: 1;
    min-width: 0;
}

.chat-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-status {
    font-size: 12px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-indicator {
    width: 6px;
    height: 6px;
    background: var(--color-ubam-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.2);
    }
}

.conversation-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    position: relative;
    z-index: 1;
}

.control-btn,
.close-button {
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    color: var(--color-ubam-white);
    cursor: pointer;
    padding: 0;
    border-radius: 50%;
    transition: var(--chat-fast-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.control-btn:hover,
.close-button:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* =========================
   Messages Container
   ========================= */
.messages-container {
    flex: 1;
    padding: 12px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    scroll-behavior: smooth;
}

.messages-container::-webkit-scrollbar {
    width: 3px;
}

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

.messages-container::-webkit-scrollbar-thumb {
    background: var(--color-ubam-gray);
    border-radius: 2px;
}

/* =========================
   Message Bubbles
   ========================= */
.message {
    display: flex;
    gap: 6px;
    animation: messageSlideIn 0.3s ease-out;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 500;
    flex-shrink: 0;
}

.message.bot .message-avatar {
    background: var(--color-ubam-light-gray);
    color: var(--color-ubam-dark-gray);
}

.message.user .message-avatar {
    background: var(--color-ubam-pink);
    color: var(--color-ubam-white);
}

.message-content {
    max-width: 220px;
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 13px;
    line-height: 1.3;
    position: relative;
    word-wrap: break-word;
}

.message.bot .message-content {
    background: var(--color-ubam-light-gray);
    color: var(--color-ubam-dark);
    border-bottom-left-radius: 4px;
}

.message.user .message-content {
    background: var(--color-ubam-dark-blue);
    color: var(--color-ubam-white);
    border-bottom-right-radius: 4px;
}

.message-time {
    font-size: 10px;
    opacity: 0.7;
    margin-top: 4px;
}

.whatsapp-phone-link {
    color: inherit;
    text-decoration: underline;
    font-weight: 600;
    padding: 2px 4px;
    border-radius: 4px;
    transition: var(--chat-fast-transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.whatsapp-phone-link::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2325D366'%3E%3Cpath d='M17.472 14.382c-.297-.149-1.758-.867-2.03-.967-.273-.099-.471-.148-.67.15-.197.297-.767.966-.94 1.164-.173.199-.347.223-.644.075-.297-.15-1.255-.463-2.39-1.475-.883-.788-1.48-1.761-1.653-2.059-.173-.297-.018-.458.13-.606.134-.133.298-.347.446-.52.149-.174.198-.298.298-.497.099-.198.05-.371-.025-.52-.075-.149-.669-1.612-.916-2.207-.242-.579-.487-.5-.669-.51-.173-.008-.371-.01-.57-.01-.198 0-.52.074-.792.372-.272.297-1.04 1.016-1.04 2.479 0 1.462 1.065 2.875 1.213 3.074.149.198 2.096 3.2 5.077 4.487.709.306 1.262.489 1.694.625.712.227 1.36.195 1.871.118.571-.085 1.758-.719 2.006-1.413.248-.694.248-1.289.173-1.413-.074-.124-.272-.198-.57-.347m-5.421 7.403h-.004a9.87 9.87 0 01-5.031-1.378l-.361-.214-3.741.982.998-3.648-.235-.374a9.86 9.86 0 01-1.51-5.26c.001-5.45 4.436-9.884 9.888-9.884 2.64 0 5.122 1.03 6.988 2.898a9.825 9.825 0 012.893 6.994c-.003 5.45-4.437 9.884-9.885 9.884m8.413-18.297A11.815 11.815 0 0012.05 0C5.495 0 .16 5.335.157 11.892c0 2.096.547 4.142 1.588 5.945L.057 24l6.305-1.654a11.882 11.882 0 005.683 1.448h.005c6.554 0 11.89-5.335 11.893-11.893a11.821 11.821 0 00-3.48-8.413Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    flex-shrink: 0;
}

.message.bot .whatsapp-phone-link:hover {
    background-color: rgba(37, 211, 102, 0.1);
}

.message.user .whatsapp-phone-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* =========================
   Typing Indicator
   ========================= */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 12px 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.typing-dots {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
    background: var(--color-ubam-light-gray);
    border-radius: 16px;
    border-bottom-left-radius: 4px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--color-ubam-dark-gray);
    border-radius: 50%;
    animation: typingAnimation 1.4s infinite;
}

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

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

@keyframes typingAnimation {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-8px);
    }
}

/* =========================
   Input Area
   ========================= */
.input-area {
    padding: 12px 16px;
    background: var(--color-ubam-white);
    border-top: 1px solid var(--color-ubam-light-gray);
}

.input-container {
    display: flex;
    gap: 8px;
    align-items: flex-end;
    background: var(--color-ubam-light-gray);
    border-radius: 24px;
    padding: 8px 8px 8px 16px;
    transition: var(--chat-fast-transition);
}

.input-container:focus-within {
    background: rgba(0, 106, 107, 0.05);
    box-shadow: 0 0 0 2px rgba(0, 106, 107, 0.1);
}

.message-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 14px;
    line-height: 1.4;
    resize: none;
    outline: none;
    max-height: 120px;
    overflow-y: auto;
    font-family: inherit;
    padding: 6px 0;
}

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

.message-input::-webkit-scrollbar {
    width: 4px;
}

.message-input::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 2px;
}

.message-input::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2px;
}

.message-input::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.4);
}

.send-button {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: var(--color-ubam-dark-blue);
    color: var(--color-ubam-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--chat-fast-transition);
    flex-shrink: 0;
}

.send-button:hover {
    background: var(--color-ubam-blue);
    transform: scale(1.05);
}

.send-button:active {
    transform: scale(0.95);
}

.send-button:disabled {
    background: var(--color-ubam-gray);
    cursor: not-allowed;
    transform: none;
}

/* =========================
   Welcome Message
   ========================= */
.welcome-message {
    text-align: center;
    padding: 20px 12px;
    color: var(--color-ubam-gray);
}

.welcome-icon {
    font-size: 36px;
    margin-bottom: 10px;
    color: var(--color-ubam-dark-blue);
}

.welcome-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--color-ubam-dark);
}

.welcome-subtitle {
    font-size: 12px;
    line-height: 1.3;
    margin-bottom: 12px;
}

#warning-message {
    text-align: center;
    color: var(--color-ubam-gray);
    font-size: 0.8rem;
    margin-top: 0.6rem;
}

/* =========================
   Suggestions
   ========================= */
.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
}

.suggestion-chip {
    background: var(--color-ubam-white);
    color: var(--color-ubam-dark);
    border: 1px solid var(--color-ubam-light-gray);
    border-radius: 10px;
    padding: 4px 8px;
    font-size: 11px;
    cursor: pointer;
    transition: var(--chat-fast-transition);
}

.suggestion-chip:hover {
    background: var(--color-ubam-light-blue);
    border-color: var(--color-ubam-blue);
}

/* =========================
   Modal Content
   ========================= */
.clear-chat-content,
.rate-limit-content {
    background: var(--color-ubam-white);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 32px rgba(33, 33, 33, 0.3);
    width: 90%;
    animation: slideIn 0.3s ease;
    text-align: center;
}

.clear-chat-content {
    max-width: 320px;
}

.rate-limit-content {
    max-width: 380px;
}

.clear-chat-content h6,
.rate-limit-content h6 {
    margin: 0 0 12px;
    font-weight: 600;
    color: var(--color-ubam-dark);
}

.clear-chat-content h6 {
    font-size: 18px;
}

.rate-limit-content h6 {
    font-size: 20px;
}

.clear-chat-content p,
.rate-limit-content p {
    margin: 0 0 16px;
    color: var(--color-ubam-dark-gray);
    font-size: 14px;
    line-height: 1.45;
}

.clear-chat-content p {
    margin-bottom: 20px;
}

.clear-chat-actions,
.rate-limit-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.rate-limit-btn {
    background: var(--color-ubam-dark-blue);
    color: var(--color-ubam-white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    transition: background-color 0.2s ease;
    min-width: 80px;
}

.rate-limit-btn:hover {
    background: var(--color-ubam-blue);
}

.rate-limit-icon {
    width: 48px;
    height: 48px;
    background: var(--color-ubam-pink);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    color: var(--color-ubam-white);
}

.rate-limit-stats {
    background: var(--color-ubam-light-gray);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
}

.rate-limit-stat {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 13px;
}

.rate-limit-stat:last-child {
    margin-bottom: 0;
}

.rate-limit-stat-label {
    color: var(--color-ubam-dark-gray);
}

.rate-limit-stat-value {
    color: var(--color-ubam-dark);
    font-weight: 600;
}

.rate-limit-progress {
    margin: 16px 0;
}

.rate-limit-progress-bar {
    width: 100%;
    height: 6px;
    background: var(--color-ubam-light-gray);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
}

.rate-limit-progress-fill {
    height: 100%;
    background: var(--color-ubam-pink);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.rate-limit-progress-text {
    font-size: 12px;
    color: var(--color-ubam-dark-gray);
    margin-bottom: 4px;
}

/* =========================
   Animations
   ========================= */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* =========================
   Responsive
   ========================= */
@media (max-width: 768px) {
    .chat-fab {
        bottom: 20px;
        right: 20px;
        width: 52px;
        height: 52px;
    }

    .chatbot-container {
        bottom: 80px;
        right: 12px;
        width: 340px;
        height: 500px;
    }

    .message-content {
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    .chat-fab {
        bottom: 16px;
        right: 16px;
        width: 48px;
        height: 48px;
    }

    .chat-fab .notification-badge {
        width: 16px;
        height: 16px;
        font-size: 10px;
    }

    .chatbot-container {
        bottom: 0;
        right: 0;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        border-radius: 0;
        transform-origin: center;
    }

    .chat-header {
        padding: 12px 16px;
        min-height: 60px;
    }

    .avatar {
        width: 32px;
        height: 32px;
    }

    .chat-title {
        font-size: 15px;
    }

    .chat-status {
        font-size: 11px;
    }

    .messages-container {
        padding: 8px 12px;
        gap: 8px;
    }

    .message-content {
        max-width: calc(100vw - 80px);
        font-size: 14px;
        padding: 12px 16px;
    }

    .input-area {
        padding: 8px 12px 20px;
    }

    .input-container {
        padding: 6px 6px 6px 16px;
    }

    .message-input {
        font-size: 16px;
        padding: 10px 0;
    }

    .send-button {
        width: 40px;
        height: 40px;
    }

    .welcome-message {
        padding: 16px;
    }

    .suggestions {
        gap: 6px;
    }

    .suggestion-chip {
        padding: 6px 12px;
        font-size: 12px;
    }
}

@media (max-width: 320px) {
    .message-content {
        max-width: calc(100vw - 60px);
        font-size: 13px;
    }

    .input-container {
        padding: 4px 4px 4px 12px;
    }

    .send-button {
        width: 36px;
        height: 36px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}