/* Mini-chat IA — canto inferior direito (desktop) / ecrã inteiro (mobile) */
.tb-ai-widget {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 1080;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

.tb-ai-widget-fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--tb-orange), var(--tb-orange2));
    color: #fff;
    font-size: 22px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, .22);
    cursor: pointer;
    transition: transform .15s, box-shadow .15s;
}

.tb-ai-widget-fab:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 22px rgba(244, 121, 32, .45);
}

.tb-ai-widget-panel {
    position: absolute;
    right: 0;
    bottom: 68px;
    width: min(360px, calc(100vw - 36px));
    height: min(480px, calc(100vh - 100px));
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .18);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--tb-border);
}

.tb-ai-widget-header {
    background: var(--tb-navy);
    color: #fff;
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-shrink: 0;
}

.tb-ai-widget-header strong {
    font-size: 14px;
}

.tb-ai-widget-header small {
    opacity: .85;
    font-size: 11px;
}

.tb-ai-widget-close {
    background: rgba(255, 255, 255, .12);
    border: none;
    color: #fff;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    flex-shrink: 0;
    padding: 0;
}

.tb-ai-widget-close:hover,
.tb-ai-widget-close:focus {
    background: rgba(255, 255, 255, .22);
    outline: none;
}

.tb-ai-widget-msgs {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: var(--tb-light);
    -webkit-overflow-scrolling: touch;
}

.tb-ai-widget-msg {
    max-width: 92%;
    padding: 8px 11px;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.5;
    word-break: break-word;
}

.tb-ai-widget-msg.user {
    align-self: flex-end;
    background: var(--tb-navy);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.tb-ai-widget-msg.bot {
    align-self: flex-start;
    background: #fff;
    border: 1px solid var(--tb-border);
    color: var(--tb-text);
    border-bottom-left-radius: 4px;
}

.tb-ai-widget-msg.tb-ai-widget-msg-error {
    background: #fff8f0;
    border-color: #f5d0a9;
    color: #8a5a20;
}

.tb-ai-widget-topics-wrap {
    flex-shrink: 0;
    background: var(--tb-light);
    border-top: 1px solid var(--tb-border);
}

.tb-ai-widget-topics-wrap.is-collapsed {
    display: none;
}

.tb-ai-widget-topics-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px 0;
    gap: 8px;
}

.tb-ai-widget-topics-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--tb-muted);
}

.tb-ai-widget-topics-hide {
    border: none;
    background: transparent;
    color: var(--tb-muted);
    font-size: 20px;
    line-height: 1;
    min-width: 36px;
    min-height: 36px;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.tb-ai-widget-topics-hide:hover,
.tb-ai-widget-topics-hide:focus {
    background: rgba(0, 0, 0, .06);
    color: var(--tb-navy);
    outline: none;
}

.tb-ai-widget-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 6px 12px 10px;
    background: var(--tb-light);
}

.tb-ai-widget-topic {
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--tb-border);
    background: #fff;
    color: var(--tb-navy);
    cursor: pointer;
}

.tb-ai-widget-topic:hover {
    border-color: var(--tb-orange);
    color: var(--tb-orange);
}

.tb-ai-widget-input {
    display: flex;
    gap: 8px;
    padding: 10px 12px;
    border-top: 1px solid var(--tb-border);
    background: #fff;
    flex-shrink: 0;
    /* iOS safe area quando teclado / home indicator */
    padding-bottom: max(10px, env(safe-area-inset-bottom, 0px));
}

.tb-ai-widget-input input {
    flex: 1;
    /* >=16px evita zoom automático do iOS nos inputs */
    font-size: 16px !important;
    line-height: 1.35;
    min-height: 44px;
}

.tb-ai-widget-input button {
    border: none;
    background: var(--tb-orange);
    color: #fff;
    border-radius: 10px;
    width: 44px;
    min-width: 44px;
    height: 44px;
    cursor: pointer;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

body.tb-ai-widget-open {
    overflow: hidden;
}

/* —— Mobile / tablet: painel a ecrã inteiro —— */
@media (max-width: 767.98px) {
    .tb-ai-widget {
        right: 14px;
        bottom: 14px;
    }

    .tb-ai-widget.is-open {
        inset: 0;
        right: 0;
        bottom: 0;
        left: 0;
        top: 0;
        z-index: 2000;
    }

    .tb-ai-widget.is-open .tb-ai-widget-panel {
        position: fixed;
        inset: 0;
        right: 0;
        bottom: 0;
        left: 0;
        top: 0;
        width: 100%;
        width: 100vw;
        height: 100%;
        height: 100dvh;
        max-height: none;
        border-radius: 0;
        border: none;
        box-shadow: none;
    }

    .tb-ai-widget.is-open .tb-ai-widget-fab {
        display: none;
    }

    .tb-ai-widget-header {
        padding: 14px 16px;
        padding-top: max(14px, env(safe-area-inset-top, 0px));
    }

    .tb-ai-widget-header strong {
        font-size: 15px;
    }

    .tb-ai-widget-close {
        min-width: 48px;
        min-height: 48px;
        font-size: 28px;
        border-radius: 12px;
        background: rgba(255, 255, 255, .18);
    }

    .tb-ai-widget-msgs {
        padding: 14px;
    }

    .tb-ai-widget-msg {
        font-size: 14px;
        max-width: 95%;
    }

    .tb-ai-widget-topics {
        padding: 8px 14px 12px;
        gap: 8px;
    }

    .tb-ai-widget-topic {
        font-size: 13px;
        padding: 8px 14px;
        min-height: 40px;
    }

    .tb-ai-widget-input {
        padding: 12px 14px;
        padding-bottom: max(12px, env(safe-area-inset-bottom, 0px));
        gap: 10px;
    }
}